Explosion-proof mounting structure of traction machine encoder

Abstract

An explosion-proof mounting structure of a traction machine encoder, the encoder is mounted on the end of the traction machine motor shaft, characterized by: including an encoder sleeve and an encoder cover, which are installed in one body to form an encoder mounting cavity inside, the encoder sleeve includes a sleeve and a sleeve mounting part, the inner hole of the sleeve is provided with a plurality of inner ring surfaces with different inner diameters, one end of the sleeve is provided with a cover mounting inner ring for the cover to extend into, the other end of the sleeve is provided with a copper sleeve mounting inner ring and an oil seal mounting inner ring, a copper sleeve and an oil seal are respectively mounted between the copper sleeve mounting inner ring and the oil seal mounting inner ring and the motor shaft, the cover includes a cover sleeve, a mounting boss and a cover cap, the cover cap is closed at one end of the cover sleeve, the mounting boss is fixedly arranged on the outer ring of the cover sleeve, the part of the cover sleeve extending beyond the mounting boss extends into the cover mounting inner ring, and the sleeve mounting part is matched with the mounting boss and fixed together. Advantage: avoid encoder damage; the encoder is closed in the mounting cavity, reducing the possibility of being ignited, improving the protection level and safety.

Description

Technical Field

[0001] This utility model belongs to the field of traction machine technology, specifically relating to an explosion-proof installation structure for a traction machine encoder. Background Technology

[0002] In today's society, with rapid industrial development, the demand for traction machines in various factories, mines, and chemical enterprises is increasing. These factories often store large quantities of flammable and explosive materials, and the air may be filled with various volatile, flammable, and explosive gases or dust. Working in such a hazardous environment, traditional traction machines may generate electrical sparks and high temperatures during operation due to the operation of electrical equipment and friction between mechanical parts. These could potentially ignite flammable and explosive materials, leading to explosions and causing serious casualties and property damage. Therefore, to ensure the safe operation of factories, traction machines need to be explosion-proof. However, the encoders installed on ordinary traction machines are exposed to the external environment and have a low protection level, failing to meet explosion-proof requirements.

[0003] In view of the aforementioned existing technology, it is necessary to make reasonable improvements to the encoder mounting structure of the existing traction machine. To this end, the applicant has made a beneficial design, and the technical solution described below is a product of this background. Utility Model Content

[0004] The objective of this invention is to provide an explosion-proof mounting structure for a traction machine encoder, which completely encloses the encoder within the mounting cavity, preventing potential electrical sparks from coming into contact with flammable and explosive substances in the external environment, reducing the possibility of ignition, and improving the protection level and safety.

[0005] The present invention achieves its objective as follows: An explosion-proof mounting structure for a traction machine encoder, comprising an encoder and an encoder connecting shaft, wherein the encoder is mounted on the encoder connecting shaft, and the encoder connecting shaft is mounted on the end of the motor shaft of the traction machine. The explosion-proof encoder structure further comprises an encoder sleeve and an encoder cover, wherein the encoder sleeve and encoder cover are fitted together as a single unit and, when mounted on the traction machine, form an encoder mounting cavity inside; the encoder sleeve comprises a sleeve and a sleeve mounting portion, wherein the inner ring of the sleeve has multiple inner ring surfaces with different inner diameters. One end of the sleeve is provided with a cover mounting inner ring for the encoder cover to extend into and for guiding and fixing purposes. The other end of the sleeve is provided with a copper sleeve mounting inner ring and an oil seal mounting inner ring. The copper sleeve mounting inner ring and the oil seal mounting inner ring are respectively installed between the copper sleeve and the outer ring of the motor shaft end. The encoder cover includes a cover cylinder, a mounting boss and a cover cover. The cover cover is closed at one end of the cover cylinder. The mounting boss is fixed to the outer ring of the cover cylinder. The part of the cover cylinder extending through the mounting boss extends into the cover mounting inner ring. The cylinder mounting part cooperates with the mounting boss and is fixed together with fasteners.

[0006] In a specific embodiment of this utility model, the protruding mounting shaft of the encoder is embedded in the encoder connecting shaft, and the encoder connecting shaft is fixedly mounted to the end of the motor shaft by fasteners.

[0007] In another specific embodiment of this utility model, the inner ring surface with the smallest inner diameter in the middle of the sleeve is a guide surface, and the guide surface corresponds to the encoder and has a gap between it and the encoder.

[0008] In another specific embodiment of this utility model, the inner ring of the oil seal is located near the outermost end of the sleeve.

[0009] In another specific embodiment of this utility model, the copper sleeve and the inner ring of the copper sleeve are configured with an interference fit.

[0010] In another specific embodiment of this utility model, a gap is left between the copper sleeve and the motor shaft.

[0011] In a further specific embodiment of this utility model, the cylinder mounting part is formed by extending outward from one end of the sleeve, and the cylinder mounting part is connected to a fixed component on the traction machine, which is a motor housing or a brake.

[0012] In a further specific embodiment of this utility model, a cable introduction device is provided in the middle of the cover to facilitate the introduction of the cable into the encoder mounting cavity and connection with the encoder, so as to output the encoder's detection results.

[0013] Due to the above-mentioned structure, this utility model has the following advantages: First, the encoder is securely installed and placed in the inner ring of the guide surface inside the encoder sleeve, which can prevent the encoder from being damaged by vibration; Second, the encoder is completely enclosed in the mounting cavity formed by the encoder sleeve and the encoder cover, preventing flammable and explosive gases, dust and other hazardous substances in the external environment from entering, thereby avoiding contact between possible electrical sparks and flammable and explosive substances, reducing the possibility of ignition, and improving the protection level and safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the explosion-proof installation structure of the traction machine encoder described in this utility model.

[0015] In the diagram: 1. Encoder; 11. Protruding mounting shaft; 2. Encoder connecting shaft; 3. Encoder sleeve; 31. Sleeve; 311. Guide surface; 312. Inner ring for cover mounting; 313. Inner ring for copper sleeve mounting; 314. Inner ring for oil seal mounting; 32. Cylinder mounting part; 4. Encoder cover; 41. Cover cylinder; 42. Mounting boss; 43. Cover; 431. Cable entry device; 5. Motor shaft; 6. Copper sleeve; 7. Oil seal. Detailed Implementation

[0016] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the applicant's description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes based on the concept of this utility model should be considered within the scope of protection of this utility model.

[0017] In the following description, all directional or orientational concepts involving up, down, left, right, front, and back are based on the positions shown in the corresponding figures, and therefore should not be construed as a special limitation on the technical solution provided by this utility model.

[0018] Please see Figure 1 This utility model relates to an explosion-proof mounting structure for a traction machine encoder. The explosion-proof mounting structure is installed at one end of the traction machine and specifically includes an encoder 1, an encoder connecting shaft 2, an encoder sleeve 3, and an encoder cover 4. When the encoder sleeve 3 and encoder cover 4 are fitted together and installed on the traction machine, an internal mounting cavity for the encoder 1 is formed. The protruding mounting shaft 11 of the encoder 1 is embedded in the encoder connecting shaft 2, and the encoder connecting shaft 2 is fixedly mounted to the end of the motor shaft 5 by fasteners.

[0019] The encoder sleeve 3 includes a sleeve 31 and a sleeve mounting part 32. The inner hole of the sleeve 31 is machined with multiple inner ring surfaces of different inner diameters. The inner ring surface with the smallest inner diameter in the middle is a guide surface 311. The guide surface 311 corresponds to the encoder 1 and leaves a gap between it and the encoder 1. One end of the sleeve 31 is provided with a cover mounting inner ring 312 for the encoder cover 4 to extend into it and for guiding and fixing. The other end of the sleeve 31 is provided with a copper sleeve mounting inner ring 313 and an oil seal mounting inner ring 314. A copper sleeve 6 and an oil seal 7 are respectively installed between the copper sleeve mounting inner ring 313 and the outer ring of the motor shaft 5. The oil seal mounting inner ring 314 is located at the outermost end of the sleeve 31. The copper sleeve 6 and the inner ring 313 of the copper sleeve mounting hole are configured with an interference fit. A gap is left between the copper sleeve 6 and the motor shaft 5, so that even if the two collide, it is not easy to generate sparks when the copper sleeve 6 rubs against the motor shaft 5. The oil seal 7 prevents dust, grease, and flammable and explosive gases from entering the mounting cavity of the encoder 1.

[0020] The sleeve mounting part 32 is formed by extending outward from one end of the sleeve 31. The sleeve mounting part 32 is connected to a fixed component on the traction machine, which is a motor housing or a brake.

[0021] The encoder cover 4 includes a cover cylinder 41, a mounting boss 42, and a cover 43. The cover 43 is closed at one end of the cover cylinder 41. The mounting boss 42 is fixed to the outer ring of the cover cylinder 41. The portion of the cover cylinder 41 extending past the mounting boss 42 extends into the inner ring 312 of the cover mounting cylinder. The cylinder mounting portion 32 stops on the mounting boss 42. The cylinder mounting portion 32 and the mounting boss 42 cooperate and are fixed together with fasteners. A cable introduction device 431 is provided in the middle of the cover 43 to facilitate the introduction of the cable into the encoder mounting cavity to connect with the encoder 1 and output the detection result of the encoder 1.

[0022] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of this utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

[0023] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the invention task, and accurately realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. An explosion-proof mounting structure for a traction machine encoder, comprising an encoder (1) and an encoder connecting shaft (2), wherein the encoder (1) is mounted on the encoder connecting shaft (2), and the encoder connecting shaft (2) is mounted on the end of the motor shaft (5) of the traction machine, characterized in that: The explosion-proof installation structure also includes an encoder sleeve (3) and an encoder cover (4). When the encoder sleeve (3) and the encoder cover (4) are installed together as a whole and installed on the traction machine, an mounting cavity for the encoder (1) is formed inside. The encoder sleeve (3) includes a sleeve (31) and a sleeve mounting part (32). The inner hole of the sleeve (31) is machined with multiple inner ring surfaces with different inner diameters. At one end of the sleeve (31), a cover mounting inner ring (312) is provided for the encoder cover (4) to extend into it and to guide and fix it. At the other end of the sleeve (31), a copper sleeve mounting inner ring (313) and an oil seal mounting inner ring (314) are provided. The inner ring (313) of the copper sleeve and the inner ring (314) of the oil seal are respectively installed between the outer ring of the motor shaft (5) and the end ring of the motor shaft (5). The encoder cover (4) includes a cover cylinder (41), a mounting boss (42) and a cover (43). The cover (43) is closed at one end of the cover cylinder (41). The mounting boss (42) is fixed to the outer ring of the cover cylinder (41). The part of the cover cylinder (41) extending through the mounting boss (42) extends into the inner ring (312) of the cover. The cylinder mounting part (32) cooperates with the mounting boss (42) and is fixed together with fasteners.

2. The explosion-proof installation structure of a traction machine encoder according to claim 1, characterized in that: The protruding mounting shaft (11) of the encoder (1) is embedded in the encoder connecting shaft (2), and the encoder connecting shaft (2) is fixedly mounted to the end of the motor shaft (5) by fasteners.

3. The explosion-proof installation structure of a traction machine encoder according to claim 1, characterized in that: The inner ring surface with the smallest inner diameter in the middle of the sleeve (31) is the guide surface (311), which corresponds to the encoder (1) and has a gap between it and the encoder (1).

4. The explosion-proof installation structure of a traction machine encoder according to claim 1, characterized in that: The inner ring (314) of the oil seal is located near the outermost end of the sleeve (31).

5. The explosion-proof installation structure of a traction machine encoder according to claim 1, characterized in that: The copper sleeve (6) and the inner ring (313) of the copper sleeve are configured as an interference fit.

6. The explosion-proof installation structure of a traction machine encoder according to claim 1, characterized in that: A gap is left between the copper sleeve (6) and the motor shaft (5).

7. The explosion-proof installation structure of a traction machine encoder according to claim 1, characterized in that: The cylinder mounting part (32) is formed by extending outward from one end of the sleeve (31). The cylinder mounting part (32) is connected to a fixed component on the traction machine, which is a motor housing or a brake.

8. The explosion-proof installation structure of a traction machine encoder according to claim 1, characterized in that: The cover (43) has a cable introduction device (431) in the middle, which facilitates the cable to be introduced into the encoder mounting cavity and connected to the encoder (1) to output the detection result of the encoder (1).

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