Bidirectional adjustable speed reducer

Abstract

The utility model discloses a bidirectional adjustable speed reducer which comprises a shell, an input shaft, a worm, an output shaft and a worm gear. The connecting position of the input shaft and the worm on the shell can be adjusted in the axial direction of the input shaft. The connection position of the output shaft and the worm gear on the shell can be adjusted in the radial direction of the input shaft. The worm gear adjusting device has the advantages that the adjusting range of the gap between the worm gear and the worm is enlarged, and the designed gap can be better covered; 2, the structure is simple, the operation is convenient, and various adjustment requirements of common and enveloping worms can be simultaneously met through bidirectional adjustment; and 3, after the adjustment is finished, the positions of the input shaft and the output shaft on the shell can be well kept stable.

Description

Technical Field

[0001] The utility model relates to a speed reducer, in particular to a bidirectional adjustable speed reducer. Background Art

[0002] In the commonly used worm and worm wheel form of a speed reducer, a worm is arranged on the input shaft, and a worm wheel is arranged on the output shaft. Through the transmission between the worm and the worm wheel, the deceleration from input to output is completed. There are tolerances in the processing of components such as the housing, input shaft, and output shaft of the speed reducer. After the assembly is completed, the accumulated tolerances will make the clearance between the worm and the worm wheel larger or smaller than the designed clearance. Whether the clearance between the worm and the worm wheel is too large or too small may cause the speed reducer to run smoothly or even be damaged. It can be seen that the clearance between the worm and the worm wheel is a very important parameter for the efficiency and service life of the speed reducer. Therefore, after the speed reducer is assembled, it is necessary to adjust the clearance between the worm and the worm wheel to make it meet the designed clearance. At present, in the speed reducer, the adjustment method of the clearance between the worm and the worm wheel is mainly: the relative position between one of the worm and the worm wheel and the housing is adjusted unidirectionally; the existing problem is that the adjustment range is relatively small and the versatility is limited. Summary of the Utility Model

[0003] This application provides a bidirectional adjustable speed reducer, which can solve the existing problem that when adjusting the clearance between the worm and the worm wheel of the speed reducer, the adjustable range is relatively small.

[0004] In this application, a bidirectional adjustable speed reducer is provided, including:

[0005] A housing;

[0006] An input shaft, rotatably connected to the housing and capable of adjusting its connection position in the housing along its own axial direction;

[0007] A worm, fixedly connected to the input shaft;

[0008] An output shaft, rotatably connected to the housing and capable of adjusting its connection position in the housing along its own radial direction;

[0009] A worm wheel, fixedly connected to the output shaft and meshing with the worm.

[0010] In some embodiments, among the two first installation positions of the housing corresponding to the input shaft:

[0011] A first bearing for installing the input shaft is installed at one of the first installation positions; at least one of the two between the first bearing and the housing and between the first bearing and the input shaft can slide relative to each other in the axial direction of the input shaft;

[0012] Another first installation position is detachably and fixedly connected with a first installation block, and the first installation block can adjust its fixed position on the housing along the axial direction of the input shaft; the first installation block is provided with a second bearing for installing the input shaft; neither between the second bearing and the first installation block nor between the second bearing and the input shaft can they slide relative to each other in the axial direction of the input shaft.

[0013] In some embodiments, in two second installation positions corresponding to the output shaft on the housing: both are fixedly connected with second installation blocks, and the second installation blocks can adjust their fixed positions on the housing around a first axis; the second installation blocks are provided with third bearings for installing the output shaft, and the axis of the output shaft is eccentric with the first axis.

[0014] In some embodiments, gaskets that are pressed and fixed together can also be added between the first installation block and the housing, and the number of gaskets can be changed.

[0015] In some embodiments, the second installation blocks are evenly provided with a plurality of installation hole positions in a circular array around the first axis.

[0016] In some embodiments, the number of the second bearings is two, and the first installation block has a first annular protrusion for positioning between the two second bearings.

[0017] In summary, in the present application, a bidirectional adjustable speed reducer includes a housing, an input shaft, a worm, an output shaft and a worm gear. The input shaft and the worm can adjust their connection positions on the housing along the axial direction of the input shaft. The output shaft and the worm gear can adjust their connection positions on the housing along the radial direction of the input shaft. The beneficial effects are as follows: 1. Increase the adjustment range of the gap between the worm and the worm gear, and better cover the designed gap; 2. The structure is simple and the operation is convenient. The bidirectional adjustment can meet various adjustment requirements of ordinary and enveloping worms at the same time; 3. After the adjustment is completed, the positions of the input shaft and the output shaft on the housing can be well maintained stable. Description of the Drawings

[0018] In order to better and clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

[0019] Figure 1 It is a schematic diagram of the present application;

[0020] Figure 2 It is a front view of the present application;

[0021] Figure 3 It is Figure 2 The cross-sectional view along A-A in

[0022] Figure 4 It is Figure 3 The enlarged schematic diagram of part A in

[0023] Figure 5 For Figure 2 Cross-sectional view along B-B in the middle.

[0024] In the figure,

[0025] 1. Housing; 1a. First mounting position; 1a1. First bearing; 1b. First mounting block; 1b1. Second bearing; 1b2. Second bolt; 1b3. First annular protrusion; 1c. Second mounting position; 1d. Second mounting block; 1d1. Third bearing; 1d2. Mounting hole position; 1d3. Third bolt;

[0026] 2. Input shaft;

[0027] 3. Worm;

[0028] 4. Output shaft;

[0029] 5. Worm gear;

[0030] 6. Gasket. Specific implementation manner

[0031] The following is a further description with reference to the accompanying drawings. The accompanying drawings are only examples and are not drawn strictly to scale. Some parts in the drawings are simple schematic diagrams and are not the specific physical outer shape structures. Unless otherwise defined, the technical terms or scientific terms used in this disclosure should have the ordinary meaning understood by those of ordinary skill in the field to which this disclosure belongs. The "first", "second" and similar terms used in this disclosure do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "including" or "comprising" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly. Without conflict, the embodiments in this application can be combined with each other.

[0032] Please refer to Figure 1 , Figure 2 and Figure 3 , a bidirectional adjustable speed reducer, including a housing 1, an input shaft 2, a worm 3, an output shaft 4 and a worm gear 5.

[0033] The housing 1 can adopt a honeycomb structure for reinforcement and heat dissipation optimization to meet the requirements of high rigidity, high precision and high-speed rotation.

[0034] The input shaft 2 is rotatably connected to the housing 1 and can also adjust its connection position on the housing 1 along its own axis. For the convenience of subsequent description, the connection positions of both ends of the input shaft 2 on the housing 1 are set as the first installation positions 1a.

[0035] In some embodiments, for the two first installation positions 1a on the housing 1:

[0036] Please refer to Figure 3 , at one of the first installation positions 1a, a first bearing 1a1 is installed, and the inner ring of the first bearing 1a1 is used for connecting one end of the input shaft 2. At least one of the two between the first bearing 1a1 and the housing 1 and between the first bearing 1a1 and the input shaft 2 can slide relative to each other in the axial direction of the input shaft 2.

[0037] More specifically, for the space between the first bearing 1a1 and the housing 1, the first installation position 1a can be a stepped installation hole. The outer ring of the first bearing 1a1 is in transitional fit with the installation hole and can abut against the annular inner wall of the installation hole. No corresponding hole retaining ring is provided in the installation hole to limit the outer ring of the first bearing 1a1.

[0038] More specifically, for the space between the first bearing 1a1 and the input shaft 2, this end of the input shaft 2 can be stepped, in transitional fit with the inner ring of the first bearing 1a1, and the shaft shoulder can abut against the inner ring of the first bearing 1a1. No corresponding shaft retaining ring is provided on the input shaft 2 to limit the inner ring of the first bearing 1a1.

[0039] Please refer to Figure 1 and Figure 3 , at the other first installation position 1a, a first mounting block 1b is detachably and fixedly connected, and the first mounting block 1b can also adjust its fixed position on the housing 1 along the axial direction of the input shaft 2.

[0040] The first mounting block 1b is installed with a second bearing 1b1, and the inner ring of the second bearing 1b1 is used for connecting the other end of the input shaft 2. Neither of the two between the second bearing 1b1 and the first mounting block 1b and between the second bearing 1b1 and the input shaft 2 can slide relative to each other in the axial direction of the input shaft 2.

[0041] In some embodiments, the adjustment method of the first mounting block 1b at the fixed position on the housing 1 can be: there is a set of guide posts on the housing 1, the first mounting block 1b slides along the guide posts, and a first bolt that can press and fix itself on the guide posts is bolted.

[0042] Please refer to Figure 1 , Figure 3 and Figure 4, Preferably, the adjustment method of the first mounting block 1b at the fixed position of the housing 1 can also be: a fixing gasket 6 can be added between the first mounting block 1b and the housing 1, and the number of these added gaskets 6 can also be changed.

[0043] More specifically, the first mounting block 1b can be fixedly connected to the housing 1 through a plurality of second bolts 1b2, and the gasket 6 has through holes for these second bolts 1b2 to pass through. In addition, it should be noted that: the number of added gaskets 6 can be zero; when there is more than one added gasket 6, the thicknesses of these gaskets 6 can be the same or different. That is to say, a plurality of gaskets 6 can be designed in a matching manner, and according to the position to which the first mounting block 1b is to be adjusted, an appropriate number of gaskets 6 are selected and added between the first mounting block 1b and the housing 1.

[0044] In some embodiments, the arrangement between the second bearing 1b1 and the first mounting block 1b and between the second bearing 1b1 and the input shaft 2 can be: referring to the arrangement between the first bearing 1a1 and the housing 1 and between the first bearing 1a1 and the input shaft 2 above, the difference is that hole-type retaining rings and shaft-type retaining rings are added.

[0045] Please refer to Figure 4 , Preferably, the arrangement between the second bearing 1b1 and the first mounting block 1b and between the second bearing 1b1 and the input shaft 2 can also be: the number of second bearings 1b1 is two, and the first mounting block 1b has a first annular protrusion 1b3 for positioning between the two second bearings 1b1. That is to say, for the second bearing 1b1 and the input shaft 2, axial relative sliding on the input shaft 2 is still restricted by the shaft shoulder cooperating with the shaft-type retaining ring or the stop block; for the second bearing 1b1 and the first mounting block 1b, axial relative sliding on the input shaft 2 is restricted by the two second bearings 1b1 respectively abutting against the two end faces of the first annular protrusion 1b3.

[0046] Please refer to Figure 2 , The worm 3 is fixedly connected to the input shaft 2. In addition, for the input shaft 2, it can be in the form of one-end input, that is, among the two ends of the input shaft 2, the end installed in the first bearing 1a1 is used for connection with the motor. Correspondingly, the housing 1 also has a mounting block for the motor to be installed at the corresponding first mounting position 1a at this end.

[0047] Please refer to Figure 1 , The output shaft 4 is rotatably connected to the housing 1 and can also be adjusted radially in its connection position on the housing 1. For the convenience of subsequent description, the connection positions of the two ends of the output shaft 4 on the housing 1 are set as the second mounting positions 1c.

[0048] Please refer to Figure 2 and Figure 5, in some embodiments, second mounting blocks 1d are fixedly connected to the two second mounting positions 1c on the housing 1, and the second mounting blocks 1d can adjust their fixed positions on the housing 1 around the first axis. More specifically, there are holes provided on the housing 1, and the second mounting blocks 1d have second annular protrusions that are inserted into the corresponding holes. The first axis is the axis corresponding to the second annular protrusions. The second mounting blocks 1d are provided with third bearings 1d1 for mounting the output shaft 4, and the axis of the output shaft 4 is eccentric to the first axis. More specifically, the second mounting blocks 1d may have grooves for mounting the third bearings 1d1, and the axis of the groove is eccentric to the first axis. Correspondingly, after the third bearings 1d1 are mounted in the grooves, the axis of the inner ring is eccentric to the first axis. After the output shaft 4 is mounted on the inner ring of the third bearings 1d1, the axis of the output shaft 4 is also eccentric to the first axis.

[0049] By synchronously adjusting the fixed positions of the two second mounting blocks 1d on the housing 1, the output shaft 4 can adjust its connection position on the housing 1 along its own radial direction.

[0050] , in some embodiments, the adjustment method of the fixed positions of the second mounting blocks 1d on the housing 1 may be: the second mounting blocks 1d have a plurality of fan-shaped grooves, and the axes corresponding to these fan-shaped grooves are all the first axis; a plurality of third bolts 1d3 first pass through the plurality of fan-shaped grooves in sequence and then are threadedly connected to the housing 1.

[0051] Please refer to Figure 1 and Figure 2 , preferably, the adjustment method of the fixed positions of the second mounting blocks 1d on the housing 1 may also be: the second mounting blocks 1d are provided with a plurality of mounting holes 1d2, and these mounting holes 1d2 are arranged in a circular array around the first axis, and the angle (marked as the first angle) corresponding to any two adjacent mounting holes 1d2 is also the same. That is to say, when the second mounting blocks 1d are adjusted to their fixed positions on the housing 1, the rotation angle around the first axis is an integer multiple of the first angle.

[0052] Please refer to Figure 5 , the worm gear 5 is fixedly connected to the output shaft 4 and meshes with the worm 3. In addition, for the output shaft 4, it can be in the form of single-end output or double-end output.

Claims

1. A bidirectional adjustable reducer, characterized in that: include: Housing (1); An input shaft (2) is rotatably connected to the housing (1) and can also adjust its connection position on the housing (1) along its own axial direction; A worm (3) fixedly connected to the input shaft (2); An output shaft (4) is rotatably connected to the housing (1) and can also adjust its connection position on the housing (1) along its radial direction; The worm wheel (5) is fixedly connected to the output shaft (4) and meshes with the worm (3).

2. A bidirectional adjustable reducer according to claim 1, characterized in that: The housing (1) is in two first installation positions (1a) corresponding to the input shaft (2): A first bearing (1a1) for mounting the input shaft (2) is installed at a first installation position (1a); at least one of the first bearing (1a1) and the housing (1) and the first bearing (1a1) and the input shaft (2) can slide relative to each other in the axial direction of the input shaft (2); Another first mounting position (1a) is detachably fixedly connected with a first mounting block (1b), and the first mounting block (1b) can be adjusted along the axial direction of the input shaft (2) to be fixed at the housing (1); the first mounting block (1b) is installed with a second bearing (1b1) for mounting the input shaft (2); the second bearing (1b1) and the first mounting block (1b) and the second bearing (1b1) and the input shaft (2) cannot slide relative to each other in the axial direction of the input shaft (2).

3. A bidirectional adjustable reducer according to claim 1, characterized in that: The housing (1) is fixedly connected to two second installation positions (1c) corresponding to the output shaft (4), and the second installation block (1d) can be adjusted around the first axis to be fixed in the housing (1); the second installation block (1d) is installed with a third bearing (1d1) for mounting the output shaft (4), and the axis of the output shaft (4) is eccentric to the first axis.

4. A bidirectional adjustable reducer according to claim 2, characterized in that: A gasket (6) can be added between the first mounting block (1b) and the housing (1) to be pressed and fixed together, and the number of the gaskets (6) can be changed.

5. A bidirectional adjustable reducer according to claim 3, characterized in that: The second mounting block (1d) is evenly provided with a plurality of mounting holes (1d2) in a circular array around the first axis.

6. A bidirectional adjustable reducer according to claim 2, characterized in that: The number of the second bearings (1b1) is two, and the first mounting block (1b) has a first annular protrusion (1b3) for positioning between the two second bearings (1b1).

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