CN111006705A - High protection grade flame proof driven encoder subassembly - Google Patents

Abstract

Translated fromChinese

一种高防护等级隔爆传动的编码器组件，属于编码器技术领域，以解决现有的编码器在使用时需要在电机小轴与编码器小轴之间增加传动用的联轴器以及定位用的过渡法兰，因此，也存在结构复杂、成本较高、同轴度不好保证的问题。本发明包括过渡轴、编码器、过渡轴套、外壳和隔爆密封锁紧接头；编码器和过渡轴套设置在外壳内，外壳上加工有螺纹孔，外壳上的螺纹孔内设有隔爆密封锁紧接头，且隔爆密封锁紧接头与壳体之间密封配合，编码器上的导线从隔爆密封锁紧接头穿出到壳体的外部，过渡轴套与外壳之间固定连接，外壳的内部与过渡轴套之间设有第一配合面，外壳的第一配合面与过渡轴套的第一配合面之间的间隙为0‑0.104mm。本发明适用于防爆场合的使用。

A high-protection-grade explosion-proof transmission encoder assembly belongs to the technical field of encoders, so as to solve the need to add a transmission coupling and positioning between a motor small shaft and an encoder small shaft when the existing encoder is used. Therefore, there are also the problems of complex structure, high cost, and poor coaxiality guarantee. The invention includes a transition shaft, an encoder, a transition shaft sleeve, a casing and an explosion-proof sealing locking joint; the encoder and the transition shaft sleeve are arranged in the casing, the casing is machined with threaded holes, and the threaded holes on the casing are provided with explosion-proof sealing The joint is sealed and locked, and the flameproof sealed joint is sealed with the housing, the wire on the encoder is passed from the flameproof sealed joint to the outside of the shell, and the transition shaft sleeve and the shell are fixedly connected. A first matching surface is provided between the inside of the housing and the transition shaft sleeve, and the gap between the first matching surface of the housing and the first matching surface of the transition shaft sleeve is 0‑0.104 mm. The present invention is suitable for use in explosion-proof occasions.

Description

High protection grade flame proof driven encoder subassembly

Technical Field

The invention relates to an encoder assembly, in particular to a high-protection-level explosion-proof transmission encoder assembly.

Background

An encoder is a device that compiles, converts, and/or formats signals or data into a form of signals that can be used for communication transmission and storage. The motor protection device is applied to a motor, can be used for detecting whether the motor runs according to the direction and the rotating speed of system design, and plays a role in monitoring and protecting. In recent years, the number of products ordered by the explosion-proof series motors of our company is gradually increased, and more products with explosion-proof encoders are required by users. The explosion-proof encoder can be produced by fewer manufacturers in the existing encoder manufacturers on the market, and the types of the explosion-proof encoder are fewer and the price is high. The explosion-proof encoder produced by the existing encoder manufacturer is actually used by installing a small-shaft non-explosion-proof encoder in an explosion-proof shell, so that the explosion-proof function is realized. When the structure is used, a user needs to add a coupling for transmission and a transition flange for positioning between the small shaft of the motor and the small shaft of the encoder, so that the problems of complex structure, high cost and poor guarantee of coaxiality exist.

Disclosure of Invention

The invention provides an encoder component for high-protection-level explosion-proof transmission in order to solve the problems.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a high-protection-level explosion-proof transmission encoder component comprises a transition shaft, an encoder, a transition shaft sleeve, a shell and an explosion-proof sealing locking joint;

the encoder and the transition shaft sleeve are arranged in the shell, a threaded hole is processed on the shell, a flame-proof sealing locking connector is arranged in the threaded hole on the shell, the flame-proof sealing locking connector is in sealing fit with the shell, a conducting wire on the encoder penetrates out of the shell from the flame-proof sealing locking connector, the transition shaft sleeve is fixedly connected with the shell, a first matching surface is arranged between the interior of the shell and the transition shaft sleeve, a gap between the first matching surface of the shell and the first matching surface of the transition shaft sleeve is 0-0.104mm, the length of the first matching surface is greater than or equal to 12.5mm, the transition shaft is rotatably arranged in the transition shaft sleeve, the transition shaft is in sealing fit with the shell, a second matching surface is arranged between the transition shaft and the transition shaft sleeve, the gap between the second matching surface of the transition shaft and the second matching surface of the transition shaft sleeve is 0.09-0.15mm, and the length of the second, the transition shaft is provided with a connecting hole, the connecting hole and the shaft sleeve on the encoder are coaxially arranged, and the shaft sleeve on the encoder and the transition shaft as well as the shell on the encoder and the transition shaft sleeve are fixedly connected.

Compared with the prior art, the invention has the following beneficial effects:

the encoder is connected with the transition shaft through the transition shaft sleeve, and an integrated structure is formed when the encoder leaves a factory, so that a user can directly connect the encoder with a motor according to a required model, the problems that the cost is increased due to the fact that a coupler and a transition flange need to be additionally arranged when the user purchases the encoder, the connection coaxiality is poor, and the connection precision is reduced can be solved.

The explosion-proof sealing device is provided with a first matching surface, a second matching surface and an explosion-proof sealing locking joint, the length of the first matching surface is larger than or equal to 12.5mm, the gap between the first matching surface of the shell and the first matching surface of the transition shaft sleeve is 0-0.104mm, the gap between the second matching surface of the transition shaft and the second matching surface K of the transition shaft sleeve is 0.09-0.15mm, and the length of the second matching surface is larger than or equal to 9.5mm, so that the explosion is prevented from being transmitted to the outside of the shell, and the explosion-proof grade is improved. Through tests, the explosion-proof grade of the invention is ExdIICT5Gb, and meets the regulations of explosion-proof regulations GB 3836.1 and GB 3836.2.

The explosion-proof sealing locking joint is in sealing fit with the shell to play a role in water and dust prevention, and the transition shaft is in sealing fit with the shell to play a role in water, dust and oil prevention so as to improve the protection grade of the explosion-proof sealing locking joint.

Fourthly, the volume of theshell 4 is less than 500cm³In this case.

Drawings

FIG. 1 is a schematic of the present invention.

Detailed Description

Example 1: as shown in fig. 1, an encoder assembly for high-protection-level explosion-proof transmission comprises a transition shaft 1, anencoder 2, atransition shaft sleeve 3, ashell 4 and an explosion-proof sealing locking joint 5;

theencoder 2 and thetransition shaft sleeve 3 are arranged in theshell 4, a threaded hole is processed on theshell 4, an explosion-proof sealing locking connector 5 is arranged in the threaded hole on theshell 4, the explosion-proof sealing locking connector 5 is in sealing fit with the shell, a conducting wire on theencoder 2 penetrates out of theshell 4 from the explosion-proof sealing locking connector 5, thetransition shaft sleeve 3 is fixedly connected with theshell 4, a first matching surface H is arranged between the interior of theshell 4 and thetransition shaft sleeve 3, a gap between the first matching surface H of theshell 4 and the first matching surface H of thetransition shaft sleeve 3 is 0-0.104mm, the length of the first matching surface H is larger than or equal to 12.5mm, the transition shaft 1 is rotatably arranged in thetransition shaft sleeve 3, the transition shaft 1 is in sealing fit with theshell 4, a second matching surface K is arranged between the transition shaft 1 and thetransition shaft sleeve 3, a gap between the second matching surface K of the transition shaft 1 and the second matching surface K of thetransition shaft sleeve 3 is 0.09-, the length of second fitting surface K is greater than or equal to 9.5mm, and processing has connectinghole 11 on the transition axle 1, and connectinghole 11 and the coaxial setting of the axle sleeve on theencoder 2 are fixed connection between the axle sleeve on theencoder 2 and the transition axle 1 and between casing and thetransition axle sleeve 3 on theencoder 2.

The first mating surface H refers to the first mating surface H of thehousing 4 or the first mating surface H of thetransition sleeve 3.

The second matching surface K refers to the second matching surface K of the transition shaft 1 or the second matching surface K of thetransition shaft sleeve 3.

The specific structure of the sealing fit between the transition shaft 1 and thehousing 4 may be: an oil seal groove is processed on theshell 4, anoil seal 6 is arranged in the oil seal groove, and the oil seal is in sealing fit with the transition shaft 1.

The threaded hole in thehousing 4 is to meet the requirement of explosion-proof grade during manufacturing.

Example 2: as shown in fig. 1, the present embodiment is different from embodiment 1 in that: in this embodiment, a connectingflange 42 is processed on one side of thehousing 4 on which the transition shaft 1 is disposed, and apositioning boss 41 concentric with the connectingflange 42 is disposed on the connectingflange 42. Thepositioning boss 41 is used for ensuring the coaxiality between the connectinghole 11 and an external motor shaft, so as to ensure that the mounting precision meets the requirement.

Example 3: as shown in fig. 1, the present embodiment is different from embodiment 1 in that: in the embodiment, a sealing groove is processed on the circumference of the threaded hole in theshell 4, afirst sealing ring 8 is arranged on the sealing groove, and the flameproof sealing locking joint 5 is screwed into the thread of theshell 4 and is in sealing fit with thefirst sealing ring 8 on the sealing groove.

Example 4: as shown in fig. 1, the present embodiment is different from embodiment 1 in that: in the embodiment, the transition shaft 1 is further processed with a threaded hole, the threaded hole in the transition shaft 1 is communicated with the connectinghole 11, and ajackscrew 10 is arranged in the threaded hole in the transition shaft 1. In the embodiment, the shaft of the motor can be fixed by thejackscrew 10, and the rotating speed output by the shaft of the motor is transmitted to theencoder 2.

Example 5: as shown in fig. 1, the present embodiment is different from embodiment 1 in that: in the embodiment, a key groove is further processed in the connecting hole on the transition shaft 1.

The shaft of the external motor can also be connected with the connectinghole 11 of the invention through a key to transmit power.

Example 6: as shown in fig. 1, the present embodiment is different from embodiment 1 in that: the connection between the shaft sleeve on theencoder 2 and the transition shaft 1 in the embodiment is a key connection.

Adopt the key-type connection to be used for transmitting power, also can be with the longer some of the axle sleeve setting in theencoder 2 to processing the screw hole on the axle sleeve, at the downthehole jackscrew of installing of screw, can adopt the connected mode of jackscrew to fix between axle sleeve in theencoder 2 and the transition axle 1.

Example 7: as shown in fig. 1, the present embodiment is different fromembodiments 1, 2, 3, 4, 5, or 6 in that: the high-protection-level explosion-proof transmission encoder component in the embodiment further comprises anend cover 7;

the encoder is characterized in that an opening used for installing theencoder 2 and thetransition shaft sleeve 3 is formed in theshell 4, anend cover 7 is arranged at the opening of theshell 4, theshell 4 is connected with theend cover 7 in a detachable and sealing mode, a third matching surface F is arranged between theend cover 7 and theshell 4, a gap between the third matching surface F on theend cover 7 and the third matching surface F on theshell 4 is 0-0.104mm, and the length of the third matching surface is larger than or equal to 12.5 mm.

Theend cover 7 is arranged, so that theencoder 2 and thetransition shaft sleeve 3 can be conveniently installed in theshell 4, theend cover 7 is arranged for installation, meanwhile, the sealing performance between theend cover 7 and theshell 4 is guaranteed, the waterproof and dustproof effects are achieved, and the protection grade of the invention is improved. The sealing structure may preferably be: theend cover 7 is provided with a sealing groove, asecond sealing ring 9 is arranged in the sealing groove on theend cover 7, and thesecond sealing ring 9 on theend cover 7 is in sealing fit with theshell 4. Thesecond seal ring 9 in this embodiment and thefirst seal ring 8 inembodiment 3 may be made of silicon rubber.

Claims (8)

Translated fromChinese

1.一种高防护等级隔爆传动的编码器组件，其特征在于：它包括过渡轴(1)、编码器(2)、过渡轴套(3)、外壳(4)和隔爆密封锁紧接头(5)；1. A high-protection-grade flameproof encoder assembly, characterized in that: it comprises a transition shaft (1), an encoder (2), a transition shaft sleeve (3), a casing (4) and an explosion-proof seal locking connector (5);编码器(2)和过渡轴套(3)设置在外壳(4)内，外壳(4)上加工有螺纹孔，外壳(4)上的螺纹孔内设有隔爆密封锁紧接头(5)，且隔爆密封锁紧接头(5)与壳体之间密封配合，编码器(2)上的导线从隔爆密封锁紧接头(5)穿出到壳体4的外部，过渡轴套(3)与外壳(4)之间固定连接，外壳(4)的内部与过渡轴套(3)之间设有第一配合面(H)，外壳(4)的第一配合面(H)与过渡轴套(3)的第一配合面(H)之间的间隙为0-0.104mm，第一配合面(H)的长度大于或等于12.5mm，过渡轴(1)转动设置在过渡轴套(3)内，且过渡轴(1)与外壳(4)之间密封配合，过渡轴(1)与过渡轴套(3)之间设有第二配合面(K)，过渡轴(1)的第二配合面(K)与过渡轴套(3)的第二配合面(K)之间的间隙为0.09-0.15mm，第二配合面(K)的长度大于或等于9.5mm，过渡轴(1)上加工有连接孔(11)，连接孔(11)与编码器(2)上的轴套同轴设置，编码器(2)上的轴套与过渡轴(1)之间和编码器(2)上的壳体与过渡轴套(3)之间均为固定连接。The encoder (2) and the transition shaft sleeve (3) are arranged in the outer casing (4), the outer casing (4) is machined with threaded holes, and the threaded holes on the outer casing (4) are provided with an explosion-proof sealing locking joint (5) , and the flameproof seal locking joint (5) is sealed with the housing, the wire on the encoder (2) passes from the flameproof seal locking joint (5) to the outside of the housing 4, and the transition sleeve ( 3) Fixed connection with the shell (4), a first mating surface (H) is provided between the interior of the shell (4) and the transition shaft sleeve (3), and the first mating surface (H) of the shell (4) is The gap between the first mating surfaces (H) of the transition shaft sleeve (3) is 0-0.104mm, the length of the first mating surface (H) is greater than or equal to 12.5mm, and the transition shaft (1) is rotatably arranged on the transition shaft sleeve (3), and the transition shaft (1) and the outer casing (4) are in sealing fit, a second mating surface (K) is provided between the transition shaft (1) and the transition shaft sleeve (3), and the transition shaft (1) The gap between the second mating surface (K) and the second mating surface (K) of the transition sleeve (3) is 0.09-0.15mm, the length of the second mating surface (K) is greater than or equal to 9.5mm, and the transition shaft (1) A connecting hole (11) is machined on it, and the connecting hole (11) is coaxially arranged with the shaft sleeve on the encoder (2). Both the housing on the device (2) and the transition shaft sleeve (3) are fixedly connected.2.根据权利要求1所述的编码器组件，其特征在于：所述外壳(4)上设有过渡轴(1)的一侧加工有连接法兰(42)，连接法兰(42)上设有与连接法兰(42)同心的定位凸台(41)。2. The encoder assembly according to claim 1, characterized in that a connecting flange (42) is processed on the side of the casing (4) where the transition shaft (1) is provided, and the connecting flange (42) is on the side. There is a positioning boss (41) concentric with the connecting flange (42).3.根据权利要求1所述的编码器组件，其特征在于：外壳(4)上的螺纹孔的圆周上加工有密封槽，密封槽上设有第一密封圈(8)，隔爆密封锁紧接头(5)旋拧入外壳(4)的螺纹内，并且与密封槽上的第一密封圈(8)密封配合。3. The encoder assembly according to claim 1, characterized in that: a sealing groove is machined on the circumference of the threaded hole on the casing (4), a first sealing ring (8) is provided on the sealing groove, and an explosion-proof sealing lock The tight fitting (5) is screwed into the thread of the housing (4), and is in sealing fit with the first sealing ring (8) on the sealing groove.4.根据权利要求1所述的编码器组件，其特征在于：所述外壳(4)上加工有油封槽，油封槽内设有油封(6)，油封与过渡轴(1)之间密封配合。4. The encoder assembly according to claim 1, characterized in that: an oil seal groove is machined on the casing (4), an oil seal (6) is arranged in the oil seal groove, and the oil seal and the transition shaft (1) are in a sealing fit. .5.根据权利要求1所述的编码器组件，其特征在于：过渡轴(1)上还加工有螺纹孔，过渡轴(1)上的螺纹孔与连接孔(11)相互贯通，过渡轴(1)上的螺纹孔内设有顶丝(10)。5. The encoder assembly according to claim 1, characterized in that: the transition shaft (1) is further machined with threaded holes, the threaded holes on the transition shaft (1) and the connecting hole (11) communicate with each other, and the transition shaft ( 1) There is a jack screw (10) in the threaded hole.6.根据权利要求1所述的编码器组件，其特征在于：过渡轴(1)上的连接孔内还加工有键槽。6. The encoder assembly according to claim 1, wherein a keyway is also processed in the connecting hole on the transition shaft (1).7.根据权利要求1所述的编码器组件，其特征在于：它还包括端盖(7)；7. The encoder assembly according to claim 1, characterized in that: it further comprises an end cap (7);所述外壳(4)上设有用于安装编码器(2)和过渡轴套(3)的开口，外壳(4)的开口处设有端盖(7)，外壳(4)与端盖(7)之间的连接为可拆卸的密封连接，端盖(7)与外壳(4)之间设有第三配合面(F)，端盖(7)上的第三配合面(F)与外壳(4)上的第三配合面(F)之间的间隙为0-0.104mm，第三配合面的长度大于或等于12.5mm。The casing (4) is provided with an opening for installing the encoder (2) and the transition shaft sleeve (3), an end cover (7) is arranged at the opening of the casing (4), and the casing (4) is connected with the end cover (7). ) is a detachable sealed connection, a third mating surface (F) is provided between the end cover (7) and the outer shell (4), and the third mating surface (F) on the end cover (7) is connected to the outer shell (4). The gap between the third mating surfaces (F) on (4) is 0-0.104mm, and the length of the third mating surface is greater than or equal to 12.5mm.8.根据权利要求7所述的编码器组件，其特征在于：所述端盖(7)上加工有密封槽，端盖(7)上的密封槽内设有第二密封圈(9)，端盖(7)上的第二密封圈(9)与外壳(4)之间密封配合。8. The encoder assembly according to claim 7, wherein a sealing groove is machined on the end cover (7), and a second sealing ring (9) is arranged in the sealing groove on the end cover (7), The second sealing ring (9) on the end cover (7) is in sealing fit with the casing (4).

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