Speed reduction device

Abstract

The utility model provides a speed reducer, and belongs to the technical field of speed reducer parts. The speed reducer solves the problem of how to reduce the influence of a gear shaft on the speed reducer. A speed reducer comprises a shell, a gear shaft and a driven wheel are arranged in the shell, one end of the gear shaft is inserted into the shell and rotationally connected with the shell, and the speed reducer is characterized in that a plurality of helical teeth are arranged on the gear shaft, the helical teeth incline towards the insertion end of the gear shaft, an abutting portion and a buffer bearing are arranged at the insertion end, and the driven wheel is arranged on the abutting portion. The buffer bearing comprises an outer ring and an inner ring, a movable gap exists between the end face of the insertion end and the baffle and between the inner ring and the baffle, and when the gear shaft drives the driven wheel to rotate, the abutting portion can be tightly attached to the inner ring of the bearing. By buffering the matching error on the bearing and the movable gap between the baffle and the gear shaft, direct contact between the baffle and the gear shaft is avoided, and the influence of the axial force of the gear shaft on the speed reducer is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of reducer components, and in particular relates to a reduction device. Background Art

[0002] As a device that matches the speed and transmits torque between the prime mover and the working machine or actuator, the reducer is often used in environments where high-speed rotating power is transmitted to low-speed and high-torque, such as wind turbines, ship propulsion devices, and industrial machinery. Among them, the reduction mechanism can be divided into gear reducers and worm reduction mechanisms according to the transmission method. Among them, the worm reducer consists of a worm and a worm wheel to achieve the purpose of reducing the speed and increasing the torque. However, due to the low transmission efficiency of the worm reduction equipment, the equipment generates a lot of heat, is prone to wear, and is difficult to produce.

[0003] In order to solve the above problems, the prior art provides a staggered axis gear transmission device, which ensures that the two rotation axes are perpendicular to each other by arranging a number of helical teeth on the gear shaft and the gear, thereby avoiding the placement of the drive motor and the equipment being affected by changes in the transmission structure of the reduction mechanism, and adopts helical teeth for transmission, thereby ensuring the load-bearing capacity while reducing the heat generated during the operation of the reducer and the difficulty of processing the internal components of the reducer. However, due to the use of helical gears, the device will generate a certain axial force during operation. During use, it is affected by the axial force, causing the end face of the gear shaft to collide with the reduction mechanism and rub against it. Utility Model Content

[0004] The purpose of this utility model is to solve the above problems in the existing technology and propose a reduction device. The technical problem to be solved by this utility model is: how to reduce the influence of the gear shaft on the reduction device.

[0005] The purpose of the present utility model can be achieved through the following technical solutions: a reduction device, comprising a housing, a gear shaft and a driven wheel are provided in the housing, one end of the gear shaft is inserted into the housing and is rotatably connected to the housing, and is characterized in that a plurality of helical teeth are provided on the gear shaft, the helical teeth are inclined toward the insertion end of the gear shaft, and an abutment portion and a buffer bearing are provided on the insertion end, the buffer bearing comprises an outer ring and an inner ring, and there is a movable gap between the end face of the insertion end and the inner ring and the baffle, and when the gear shaft drives the driven wheel to rotate, the abutment portion can fit tightly with the inner ring of the bearing.

[0006] A gear shaft having a plurality of helical teeth and a driven wheel are disposed within the housing of the present application. The gear shaft drives the driven wheel to rotate and mesh with each other to complete the transmission of torque from the drive motor to the driven device. The helical teeth of the gear shaft are inclined toward the insertion end of the gear shaft, thereby adjusting the direction of the axial force acting on the helical teeth. This prevents the gear shaft from being separated from the housing due to the axial force during the torque transmission process. A movable gap is provided between the end face of the insertion end and the baffle on the housing to prevent the insertion end from being tightly attached to the inner surface of the baffle due to the axial force, thereby reducing the resistance increased by direct contact between the end face and the inner side of the baffle, and reducing the impact of axial force on the transmission efficiency of the gear shaft. By buffering the fitting error in the bearing, the inner ring can move forward and backward within a small range relative to the outer ring. This, in combination with the movable gap, prevents axial impact from causing wear due to direct contact between the end face of the insertion end and the baffle, thereby reducing the impact of the axial force of the gear shaft on the reduction gear. It should be noted that the fitting error is small, so the movement range is small and not easily observed by the naked eye.

[0007] In the above reduction gear, the several helical teeth on the gear shaft cooperate to form an engaging portion, which can engage with the driven wheel to transmit torque and push the inner ring to move a distance toward the baffle through the abutment portion.

[0008] In the above-mentioned reduction gear, the other end of the gear shaft is also provided with a bearing, and the meshing portion is located between the two bearings. By arranging the meshing portion between the two bearings, the rotation center of the gear shaft is ensured, and the stability of the gear shaft during rotation is improved.

[0009] In the aforementioned reduction gear, the baffle is provided with a groove, and the clearance between the bottom of the groove and the end face of the insertion end is the movable clearance. The groove in the baffle prevents relative displacement of the bearing outer ring while maintaining a certain clearance between the baffle and the end face of the insertion end, preventing them from fitting tightly under the action of axial force.

[0010] In the above-mentioned reduction gear, a rolling element is provided between the inner ring and the outer ring, and the rolling element can ensure that the insertion end can be rotatably connected to the housing after the inner ring moves a certain distance.

[0011] In the above-mentioned reduction gear, the gear shaft and driven pulley are located within the inner cavity of the housing. A retaining ring is sleeved on the other end of the gear shaft, which covers an opening on one side of the housing and forms a relatively sealed inner cavity. By providing a retaining ring covering the opening on one side of the housing, thereby forming a relatively sealed inner cavity, dust and other impurities are prevented from entering the meshing area between the gear shaft and the driven pulley, thereby extending the service life of the reduction gear.

[0012] In the above-mentioned reduction gear, fins for heat dissipation are provided outside the inner cavity.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. This application mainly connects the insertion end of the gear shaft to the housing through a buffer bearing, and utilizes the errors generated during the production and installation of the rolling bearing to allow the inner ring to undergo a small displacement, thereby bearing a certain range of axial forces, and slots are cut on the baffle to form a movable gap to avoid the end face of the insertion end colliding with the baffle of the housing and repeated friction causing damage to the reduction mechanism, reducing the impact of the axial force of the gear shaft on the reduction device and improving the service life of the reduction mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the reduction gear;

[0016] Figure 2 It is an exploded three-dimensional schematic diagram of the deceleration device;

[0017] Figure 3 It is a cross-sectional schematic diagram of the reduction gear;

[0018] In the figure, 1 is the housing; 1a is the baffle; 1a 1 is the groove; 1b is the flange; 1c is the heat sink; 1d is the cover; 1e is the cavity; 2 is the gear shaft; 2a is the meshing portion; 2a 1 is the helical tooth; 2b is the insertion end; 2b 1 is the abutment portion; 2c is the connection end; 2c 1 is the keyway; 2c 2 is the mounting hole; 2d is the retaining ring; 3 is the driven pulley; 4 is the buffer bearing; 4a is the outer ring; 4b is the inner ring; 4c is the rolling element; 5 is the meshing portion; 6 is the driven pulley; 6b is the output shaft; 7 is the movable clearance; DETAILED DESCRIPTION

[0019] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0020] like Figure 1 as well as Figure 2 As shown, the reduction gear comprises a housing 1, a gear shaft 2 and a driven wheel 63 located within the housing 1. The gear shaft 2 and the driven wheel 63 are arranged perpendicularly to each other, and the gear shaft 2 is located on the driven wheel 63. One end of the gear shaft 2 is inserted into the housing 1 and is provided with a buffer bearing 4. The other end is provided with a keyway 2c1 on the inner side and protrudes from the housing 1. The end with the keyway 2c1 is provided with a retaining ring 2d. The housing 1 has a baffle 1a at the front end and a flange 1b at the rear end. The gear shaft 2 is inserted from the end with the flange 1b on the housing 1 into the baffle 1a. The keyway 2c1 is used to connect to a drive component capable of outputting torque, such as an electric motor, pneumatic motor, or hydraulic motor. The above-mentioned drive components are of conventional design and will not be described in detail here.

[0021] It is worth mentioning that Figure 2 As shown, a buffer bearing 4 is also sleeved on one end of the gear shaft 2 having a keyway 2c1, the meshing portion 52a on the gear shaft 2 is located between the two buffer bearings 4, and an outwardly protruding abutting portion 2b1 is provided between the meshing portion 52a and the buffer bearing 4 sleeved on the insertion end 2b, the driven wheel 63 is sleeved on the output shaft 6b, and the driven wheel 63 is installed in the cavity 1e of the housing 1 through the output shaft 6b and the cover plate 1d located on one side of the housing 1, the meshing portion 52a on the gear shaft 2 and the driven wheel 63 are both provided with a plurality of helical teeth 2a1, and the helical teeth 2a1 on the gear shaft 2 and the helical teeth 2a1 on the driven wheel 63 are in a certain proportional relationship, wherein the helical teeth 2a1 on the meshing portion 52a are inclined toward the baffle 1a.

[0022] like Figure 3 As shown, the gear shaft 2 of the present application is arranged along the length direction of the housing 1 and is located directly above the driven wheel 63, and one end of the gear shaft 2 extends outward from the housing 1 and is provided with a retaining ring 2d, which cooperates with the housing 1 to form a relatively closed cavity 1e, while the other end of the gear shaft 2 is located in the housing 1 and cooperates with one of the bearings to form an insertion end 2b, the outer ring 4a of the above-mentioned bearing abuts against the baffle 1a on the housing 1, and the inner ring 4b fits against the abutment portion 2b1 protruding from the insertion end 2b, and the baffle 1a is provided with a groove 1a1, and the groove 1a A clearance 7 is defined between the bottom of the groove of the gear shaft 1 and the inner ring 4b of the aforementioned buffer bearing 4 and the end surface of the insertion end 2b. The end of the gear shaft 2 with the retaining ring 2d serves as the connecting end 2c, which is fitted with another buffer bearing 4. The buffer bearing 4 fitted on the insertion end 2b is smaller than the buffer bearing 4 on the connecting end 2c. The meshing portion 52a, which engages with the driven wheel 63, is located between the two bearings. The connecting end 2c is provided with a mounting hole 2c2 and a keyway 2c1 for connecting to a drive component. Furthermore, cooling fins 1c are provided on the outer wall of the housing 1, located on the front and rear sides and the bottom of the housing 1.

[0023] In summary, the present application transmits the torque output by the motor to the driven equipment through the cooperation between the meshing portion 52a of the gear shaft 2 and the driven wheel 63, so that it can work normally. A number of helical teeth 2a1 are respectively provided on the meshing portion 52a of the gear shaft 2 and the outside of the driven wheel 63. By adopting the helical teeth 2a1 for transmission, the axes of the gear shaft 2 and the driven wheel 63 can be perpendicular to each other, thereby adapting to more usage environments, and a retaining ring 2d is provided on the outer sleeve of the connecting end 2c on the gear shaft 2. The retaining ring 2d forms a relatively closed space in the cavity 1e of the housing 1 for setting the driven wheel 63 and the gear shaft 2, thereby avoiding wear caused by the entry of external dust and the escape of internal lubricating oil during operation, thereby improving the service life of the reduction mechanism.

[0024] The cam 24 has a plurality of cams 26 which are engaged with the driven wheel 63 to transmit torque, and the cam 24 has a plurality of cams 27 which are engaged with the driven wheel 63 to transmit torque, thereby preventing the cam 24 from being separated from the housing 1 during transmission and causing transmission failure. 1 pushes the inner ring 4b to move slightly back and forth relative to the outer ring 4a, and cooperates with the remaining movable gap 7 to prevent the end of the gear shaft 2 from impacting the inner wall of the housing 1 during use and causing damage, thereby improving the service life of the reduction gear. It should be noted that the so-called abutment portion 2b 1 in this application pushes the inner ring 4b to move a certain distance at the microscopic level. The main reason for its movement is that there are certain errors on the rolling element 4c and the inner ring 4b and outer ring 4a of the bearing. Due to the small assembly error, it is difficult to directly observe it with the naked eye during use.

[0025] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0026] Although this document frequently uses terms such as 1, housing; 1a, baffle; 1a1, groove; 1b, flange; 1c, heat sink fin; 1d, cover; 1e, cavity; 2, gear shaft; 2a, meshing portion; 2a1, helical teeth; 2b, insertion end; 2b1, abutment portion; 2c, connection end; 2c1, keyway; 2c2, mounting hole; 2d, retaining ring; 3, driven pulley; 4, buffer bearing; 4a, outer ring; 4b, inner ring; 4c, rolling element; 5, meshing portion; 6, driven pulley; 6b, output shaft; 7, free clearance, etc. in the figures, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A reduction gear, comprising a housing (1), wherein a gear shaft (2) and a driven wheel (6) are provided in the housing (1), wherein one end of the gear shaft (2) is inserted into the housing (1) and is rotatably connected to the housing (1), characterized in that: The gear shaft (2) is provided with a plurality of helical teeth (2a1), and the helical teeth (2a1) are inclined toward the insertion end of the gear shaft (2). The insertion end is provided with a supporting portion (2b1) and a buffer bearing (4). The buffer bearing (4) includes an outer ring (4a) and an inner ring (4b). There is a movable gap (7) between the end face of the insertion end and the inner ring (4b) and the baffle (1a). When the gear shaft (2) drives the driven wheel (6) to rotate, the supporting portion (2b1) can fit tightly with the inner ring (4b) of the bearing.

2. The reduction gear according to claim 1, characterized in that: A plurality of helical teeth (2a1) on the gear shaft (2) cooperate to form an engaging portion (2a), which can engage with the driven wheel (6) to transmit torque and push the inner ring (4b) toward the baffle (1a) for a distance through the abutting portion (2b1).

3. The deceleration device according to claim 2, characterized in that: The other end of the gear shaft (2) is also provided with a buffer bearing (4), and the meshing portion (2a) is located between the two buffer bearings (4).

4. The reduction gear according to claim 3, characterized in that: A groove (1a1) is provided on the baffle (1a), and a gap between the bottom of the groove (1a1) and the end surface of the insertion end is a movable gap (7).

5. The reduction gear according to any one of claims 1 to 4, characterized in that: A rolling element (4c) is provided between the inner ring (4b) and the outer ring (4a), and the rolling element (4c) can ensure that the insertion end can be rotatably connected to the housing (1) after the inner ring (4b) moves a certain distance.

6. The reduction gear according to claim 5, characterized in that: The gear shaft (2) and the driven wheel (6) are located in the cavity (1e) of the housing (1); a retaining ring is sleeved on the other end of the gear shaft (2); the retaining ring covers an opening on one side of the housing (1) and forms a relatively closed cavity (1e).

7. The reduction gear according to claim 1, characterized in that: Heat dissipation fins (1c) are provided outside the housing (1).

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