Lifting speed reducer

Abstract

The utility model provides a lifting speed reducer, and belongs to the technical field of speed reducers. The technical problem that the installation distance between an output shaft of an existing lifting speed reducer and the output end of a motor is not stable is solved. A lifting speed reducer comprises a motor and a speed reduction box, the motor comprises a machine shell, a stator, a rotor and a rotating shaft are installed in the machine shell, the speed reduction box comprises a box body, the box body is provided with an installation opening, a first limiting step protrudes out of the inner circumference of the installation opening, the installation opening is further provided with a concave clamping groove, a clamping pad is arranged in the clamping groove, and the clamping pad is arranged in the clamping groove. A first bearing is installed in the installation opening, the two ends of an outer ring of the first bearing abut against the first limiting step and the clamping pad respectively, the machine shell is fixedly connected with the box body, an inner cavity of the machine shell is directly communicated with the installation opening, and the rotating shaft penetrates through the inner ring of the first bearing, stretches into the box body and abuts against the inner ring of the first bearing. According to the utility model, the stable mounting distance between the output shaft and the output end of the motor is ensured, and the higher transmission precision of the speed reducer is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of reducers, in particular to a lifting reducer. Background Art

[0002] Lightweighting is an important trend in the current reducer production. The significance of lightweighting reducers is to directly reduce weight, improve power density and load-bearing capacity, and reduce energy consumption. In order to achieve energy conservation and emission reduction and reduce the deadweight of lifting structures, the demand for lightweight core components continues to increase.

[0003] For example, the patent number is 2015202819845, which discloses a motor, a reducer and an output shaft for connecting a drum, wherein the reducer includes a housing and a transmission input assembly, a medium-speed transmission assembly and a transmission output assembly, which are all arranged in the housing and mesh with each other. The output end of the motor is linked with the transmission input assembly, and the transmission output assembly is linked with the output shaft. By changing the medium-speed transmission assembly to achieve different transmission ratios, it occupies a small effective space and meets the requirements of lightweight lifting equipment; and after multi-stage transmission, the interaxial distance between the output shaft and the output end of the motor is opened, which is convenient for the staff to install a larger diameter drum, so that the crane lifting range adapted by the reducer is wider. However, it still has the following defects: due to the increase in the interaxial distance between the output shaft of the reducer and the output end of the motor, it is inevitable that there will be some errors when the output end of the motor is installed in the motor housing, so that the installation spacing from the output shaft to the output end of the motor is not very stable, thereby affecting the transmission accuracy of the reducer. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a lifting reducer. The technical problem to be solved by the utility model is: how to solve the problem that the installation distance between the output shaft and the output end of the motor in the existing lifting reducer is unstable and affects the transmission accuracy of the reducer.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a lifting reducer, including a motor and a reduction box, the motor including a casing, a stator, a rotor and a rotating shaft are installed in the casing, the reduction box includes a box body, the box body has a mounting opening, a limiting step 1 protrudes on the inner circumference of the mounting opening, the mounting opening also has a recessed groove, a gasket is arranged in the groove, a bearing 1 is installed in the mounting opening, the two ends of the outer ring of the bearing 1 respectively abut against the limiting step 1 and the gasket, the casing is fixedly connected to the box body, the inner cavity of the casing is directly connected to the mounting opening, the rotating shaft passes through the inner ring of the bearing 1, extends into the box body and abuts against the inner ring of the bearing 1.

[0006] Furthermore, the card pad has a stepped fixing part and a abutting part. The outer peripheral diameter of the abutting part is smaller than the inner peripheral diameter of the mounting opening. The abutting part abuts against the outer ring of the first bearing, and the fixing part is clamped with the side wall of the card slot and fixedly connected through a fixing piece.

[0007] Furthermore, a first mounting groove, a second mounting groove and a third mounting groove parallel to the axis of the mounting opening are arranged in the box body. A first-stage gear set is installed in the first mounting groove, a second-stage gear set is installed in the second mounting groove, and a third-stage gear set is installed in the third mounting groove. The third-stage gear set includes an output shaft, and the output shaft extends out of the box body and is in the same direction as the motor.

[0008] Furthermore, a second limiting step protrudes from the inner circumference of the first limiting step. A sealing member is arranged on the inner circumference of the first limiting step. The upper end of the sealing member abuts against the second limiting step, the inner circumference of the sealing member abuts against the rotating shaft, and one end of the rotating shaft extending into the box body is in meshing transmission with the first-stage gear set.

[0009] Furthermore, an annular groove coaxial with the mounting opening is arranged on the box body. The annular groove communicates with the inner cavity of the machine shell and is arranged opposite to the stator. A circular ring mounting part protrudes from the outer peripheral wall of the annular groove towards the motor, and the circular ring mounting part is fixedly connected with the machine shell.

[0010] Furthermore, a fixing groove coaxial with the mounting opening is recessed inward from the outer wall of the circular ring mounting part. An annular positioning part protrudes upward from the machine shell, and the annular positioning part is matched with the fixing groove.

[0011] Furthermore, a shock-absorbing pad is fixedly connected between the upper end of the annular positioning part and the fixing groove.

[0012] Furthermore, the motor further includes an end cover fixedly connected with the machine shell. A second bearing opposite to the first bearing is arranged in the end cover. The rotating shaft passes through the inner ring of the second bearing and abuts against the inner ring of the second bearing.

[0013] Furthermore, the box body is made of aluminum alloy.

[0014] Furthermore, the card pad is a circlip, and the circlip is embedded in the card slot.

[0015] Compared with the prior art, the technical effects of the present utility model are as follows:

[0016] 1. The first bearing is installed on the box body, and the rotating shaft is positioned and supported by the first bearing and the second bearing. During processing, only one-time tooling clamping is required for processing to ensure accuracy. By ensuring the axial distance between the mounting opening, the first mounting groove, the second mounting groove and the third mounting groove of the box body, a stable mounting distance from the output shaft to the output end of the motor can be ensured, and high transmission accuracy of the speed reducer can be ensured.

[0017] 2. The outer ring of bearing one is fixed by the limit step one and the clamping pad to prevent the axial movement of the bearing, improve the transmission accuracy between the rotating shaft and the first-stage gear set. Adding the shock-absorbing pad can make the rotating shaft better abut against the inner ring of bearing one, ensuring a high transmission accuracy of the speed reducer.

[0018] 3. The housing is made of aluminum alloy material, making the whole machine lighter in weight and stronger in corrosion resistance.

[0019] 4. The motor rotating shaft is directly meshed with the first-stage gear set for transmission, then the first-stage gear set is meshed with the second-stage gear set for transmission, and then the second-stage gear set is meshed with the third-stage gear set for transmission. The output shaft extends out of the housing and is in the same direction as the motor, which can reduce the installation space while ensuring enough space for the drum.

[0020] 5. The machine shell is directly fixedly connected to the housing, and the inner cavity of the machine shell is directly connected to the installation port, which can save the axial distance between the motor and the speed reducer and reduce the installation space of the whole machine.

[0021] 6. The clamping pad is provided with a stepped fixing part and abutting part. The abutting part is located at the uppermost end of the clamping pad and has the smallest outer diameter. The outer diameter of the abutting part is also smaller than the inner diameter of the installation port. After the fixing part is fixed to the housing, it can ensure that the abutting part better abuts against the outer ring of bearing one to prevent the axial movement of the bearing. Description of the Drawings

[0022] Figure 1 is a cross-sectional view of the present utility model.

[0023] Figure 2 is an enlarged view of A-A of the present utility model.

[0024] Reference Numerals in the Drawings: 1. Motor; 10. Machine Shell; 11. Stator; 12. Rotor; 13. Rotating Shaft; 14. End Cover; 2. Speed Reducer; 20. Housing; 201. Installation Port; 202. Limit Step One; 203. Installation Groove One; 204. Installation Groove Two; 205. Installation Groove Three; 206. Card Slot; 207. Limit Step Two; 208. Annular Groove; 209. Ring Installation Part; 210. Fixing Groove; 21. First-Stage Gear Set; 22. Second-Stage Gear Set; 23. Third-Stage Gear Set; 231. Output Shaft; 3. Clamping Pad; 31. Fixing Part; 32. Abutting Part; 4. Bearing One; 5. Sealing Element; 6. Shock-Absorbing Pad; 7. Bearing Two. Detailed Description of the Invention

[0025] The following are specific embodiments of the present utility model in combination with the drawings, further describing the technical solutions of the present utility model, but the present utility model is not limited to these embodiments.

[0026] According to Figure 1 and Figure 2As shown, a lifting reducer includes a motor 1 and a reduction box 2, the reduction box 2 includes a housing 20, the housing 20 is preferably made of aluminum alloy, a primary gear set 21, a secondary gear set 22 and a tertiary gear set 23 are installed in the housing 20, the primary gear set 21 is meshed with the output end of the motor 1, and the tertiary gear includes an output shaft 231 of the reduction box 2, and the output shaft 231 is connected to an external reel. The motor 1 includes a housing 10, a stator 11, a rotor 12 and a rotating shaft 13 are installed in the housing 10, and the rotating shaft 13 is fixed in the middle of the rotor 12 and rotates relative to the stator 11.

[0027] In order to ensure a stable installation distance between the output shaft 231 and the output end of the motor 1, an installation opening 201 and installation grooves 1 203, 204 and 205 parallel to the axis of the installation opening 201 are opened on the box body 20. Since they are all arranged on the box body 20, the box body 20 only needs to be clamped once during machining to complete the processing at one time, thereby reducing the distance error between the installation opening 201 and the installation grooves 1 203, 204 and 205 as much as possible, thereby ensuring the installation distance between them.

[0028] The first stage gear set 21 is installed in the installation slot 1 203 , the second stage gear set 22 is installed in the installation slot 204 , and the third stage gear set 23 is installed in the installation slot 3 205 . The output shaft 231 extends out of the housing 20 and is in the same direction as the motor 1 .

[0029] In order to prevent axial movement, a limiting step 202 is protruded on the inner circumference of the installation port 201, and a recessed groove 206 is set at the end portion of the installation port 201, that is, the diameter of the groove 206 is larger than the diameter of the installation port 201 and larger than the diameter of the inner shaft of the limiting step 202. The bearing 4 is firmly installed in the installation port 201, and the gasket 3 is installed in the groove 206. The two ends of the outer ring of the bearing 4 are respectively against the limiting step 202 and the gasket 3.

[0030] The housing 10 is directly fixedly connected to the box body 20. The inner cavity of the housing 10 is directly connected to the installation opening 201. The rotating shaft 13 passes through the inner ring of the first bearing 4 and extends into the box body 20 and abuts against the inner ring of the first bearing 4. The box body 20 is provided with an annular groove 208 coaxial with the installation opening 201. The annular groove 208 is directly connected to the inner cavity of the housing 10 and is arranged opposite to the stator 11. The outer peripheral wall of the annular groove 208 protrudes towards the motor 1 to form a circular ring installation part 209. The circular ring installation part 209 is fixedly connected to the housing 10. A second limiting step 207 protrudes on the inner circumference of the first limiting step 202. A sealing member 5 is arranged on the inner circumference of the first limiting step 202. The upper end of the sealing member 5 abuts against the second limiting step 207. The inner circumference of the sealing member 5 abuts against the rotating shaft 13. One end of the rotating shaft 13 extending into the box body 20 is meshed and driven with the first-stage gear set 21. The outer wall of the circular ring installation part 209 is recessed inward to form a fixing groove 210 coaxial with the installation opening 201. The housing 10 protrudes upward to form an annular positioning part 101. The annular positioning part 101 cooperates with the fixing groove 210. A shock-absorbing pad 6 is fixedly connected between the upper end of the annular positioning part 101 and the fixing groove 210.

[0031] In order to make the clamping pad 3 better play the role of preventing axial movement, the clamping pad 3 is provided with a fixing part 31 and an abutting part 32 in a stepped shape. The abutting part 32 is located at the uppermost end of the clamping pad 3 and has the smallest outer diameter, and the outer diameter of the abutting part 32 is also smaller than the inner diameter of the installation opening 201. The abutting part 32 abuts against the outer ring of the first bearing 4, that is, the abutting part 32 only contacts the outer ring of the first bearing 4. The fixing part 31 is clamped with the side wall of the clamping groove 206 and is fixedly connected through a fixing member. The fixing member can preferably be a bolt or a screw. After the fixing part 31 is fixed to the box body 20, it can ensure that the abutting part 32 better abuts against the outer ring of the first bearing 4 and prevent the axial movement of the bearing.

[0032] The motor 1 further includes an end cover 14 fixedly connected to the housing 10. A second bearing 7 opposite to the first bearing 4 is arranged inside the end cover 14. The rotating shaft 13 passes through the inner ring of the second bearing 7 and abuts against the inner ring of the second bearing 7.

[0033] Regarding the clamping pad 3, a circlip can also be selected. The clamping groove 206 is made into a groove adapted to the circlip, and the circlip is embedded in the clamping groove 206.

[0034] The above embodiments are only the preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of the present invention should be covered within the protection scope defined by the claims of the present invention.

Claims

1. A hoisting speed reducer, comprising a motor (1) and a speed reduction box (2), the motor (1) includes a casing (10), a stator (11), a rotor (12) and a rotating shaft (13) are installed inside the casing (10), the speed reduction box (2) includes a box body (20), and is characterized in that: The housing (20) has an installation opening (201). A first limiting step (202) protrudes on the inner circumference of the installation opening (201). The installation opening (201) also has a sunken card slot (206). A card pad (3) is arranged in the card slot (206). A first bearing (4) is installed in the installation opening (201). Both ends of the outer ring of the first bearing (4) are respectively abutted against the first limiting step (202) and the card pad (3). The machine shell (10) is fixedly connected to the housing (20). The inner cavity of the machine shell (10) is directly communicated with the installation opening (201). The rotating shaft (13) passes through the inner ring of the first bearing (4) and extends into the housing (20) and abuts against the inner ring of the first bearing (4). A first installation groove (203), a second installation groove (204) and a third installation groove (205) parallel to the axis of the installation opening (201) are arranged in the housing (20). A first-stage gear set (21) is installed in the first installation groove (203), a second-stage gear set (22) is installed in the second installation groove (204), and a third-stage gear set (23) is installed in the third installation groove (205). The third-stage gear set (23) includes an output shaft (231). The output shaft (231) extends out of the housing (20) and is in the same direction as the motor (1). The motor (1) further includes an end cover (14) fixedly connected to the machine shell (10). A second bearing (7) opposite to the first bearing (4) is arranged in the end cover (14). The rotating shaft (13) passes through the inner ring of the second bearing (7) and abuts against the inner ring of the second bearing (7).

2. The hoisting speed reducer according to claim 1, wherein: The card pad (3) has a stepped fixing part (31) and an abutting part (32). The outer diameter of the abutting part (32) is smaller than the inner diameter of the installation opening (201). The abutting part (32) abuts against the outer ring of the first bearing (4). The fixing part (31) is clamped with the side wall of the card slot (206) and is fixedly connected through a fixing piece.

3. The lifting speed reducer according to claim 2, characterized in that: A second limiting step (207) protrudes on the inner circumference of the first limiting step (202). A sealing member (5) is arranged on the inner circumference of the first limiting step (202). The upper end of the sealing member (5) abuts against the second limiting step (207). The inner circumference of the sealing member (5) abuts against the rotating shaft (13). One end of the rotating shaft (13) extending into the housing (20) is in meshing transmission with the first-stage gear set (21).

4. The hoisting speed reducer according to claim 3, characterized in that: An annular groove (208) coaxial with the installation opening (201) is arranged on the housing (20). The annular groove (208) is directly communicated with the inner cavity of the machine shell (10) and is arranged opposite to the stator (11). An annular installation part (209) protrudes from the outer peripheral wall of the annular groove (208) towards the motor (1). The annular installation part (209) is fixedly connected to the machine shell (10).

5. The hoisting speed reducer according to claim 4, wherein: A fixing groove (210) coaxial with the installation opening (201) is recessed in the outer wall of the annular installation part (209). An annular positioning part (101) protrudes upwards from the machine shell (10). The annular positioning part (101) cooperates with the fixing groove (210).

6. The hoisting speed reducer according to claim 5, characterized in that: A shock pad (6) is fixedly connected between the upper end of the annular positioning portion (101) and the fixing groove (210).

7. A hoisting speed reducer according to claim 1, characterized in that: The box body (20) is made of aluminum alloy.

8. The hoisting speed reducer according to claim 1, characterized in that: The clamping pad (3) is a circlip, and the circlip is embedded in the clamping groove (206).

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