Transmission device capable of automatically compensating gear clearance

Abstract

The invention discloses a transmission device capable of automatically compensating gear clearance, which comprises a driving gear, a driven gear, a compensation gear, a driving shaft, an arc-shaped groove and a driving assembly, the driving assembly comprises a wedge-shaped sliding block arranged on the end face of the driving gear in a sliding mode in the first direction, a mounting base arranged on the end face of the driving gear in a protruding mode, an elastic piece with the two ends abutting against the mounting base and the wedge-shaped sliding block respectively, and a limiting piece arranged on the end face of the driving gear in a protruding mode and used for abutting against one side of the wedge-shaped sliding block. The wedge-shaped sliding block, the elastic piece and the installation base are sequentially arranged in the first direction. The other side of the wedge-shaped sliding block is an abutting inclined face used for abutting against the circumferential face of the driving shaft, an included angle theta is formed between the abutting inclined face and the first direction, theta is larger than 0 and smaller than or equal to 30 degrees, the wedge-shaped sliding block is gradually narrowed in the direction pointing to the circumference along the circle center, and the abutting inclined face is used for preventing the driving shaft from sliding and resetting. According to the transmission device capable of automatically compensating the gear clearance, the clearance can be automatically compensated, the machining difficulty is small, and the machining cost is low.

Description

Technical Field

[0001] This invention relates to the field of mechanical transmission, and in particular to a transmission device that can automatically compensate for gear backlash. Background Technology

[0002] When bottles are transferred between various transmission components of the filling equipment, there is backlash between the transmission gears, and this backlash will increase as the transmission gears wear. This can cause misalignment of the bottles during the transfer process, resulting in bottle dropping and making it difficult to meet the customer's requirements for continuous and stable production. Backlash can also cause impact when the equipment starts up, reducing the service life of the transmission components.

[0003] In the prior art, in order to solve the above problems, one method is to stack the driving gear and the compensating gear, and use an adjusting nut in conjunction with an axially set elastic element to elastically press the compensating gear against the driving gear. After wear, the angle of misalignment between the gears is adjusted by the mutual rotation between the helical surfaces on the driving gear and the compensating gear, thereby automatically eliminating the backlash generated relative to the driven gear. This device is difficult to process and has a relatively high processing cost for the driving gear and the compensating gear. Summary of the Invention

[0004] The purpose of this invention is to provide a transmission device that can automatically compensate for gear backlash. It can not only achieve automatic compensation for backlash, but also has lower processing difficulty and processing cost for the driving gear and the compensating gear.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A transmission device capable of automatically compensating for gear backlash includes a driving gear and a driven gear that mesh with each other and are rotatable about their own axes, and a compensating gear that is coaxial with the driving gear and rotatable relative to the driving gear about its own axis. The compensating gear and the driven gear mesh with each other. The end face of the compensating gear is provided with a drive shaft parallel to its axial direction. The end face of the driving gear is provided with an arc-shaped groove whose center is located on the axis of the driving gear. The drive shaft can slide through the arc-shaped groove along its length.

[0007] The transmission device further includes a drive assembly for driving the drive shaft to slide unidirectionally in the arc-shaped groove. The drive assembly includes a wedge-shaped slider slidably disposed on the end face of the drive gear along a first direction, a mounting seat protruding from the end face of the drive gear, an elastic element with its two ends respectively abutting against the mounting seat and the wedge-shaped slider, and a limiting element protruding from the end face of the drive gear and used to abut against one side of the wedge-shaped slider. The wedge-shaped slider, the elastic element and the mounting seat are arranged sequentially along the first direction.

[0008] The other side of the wedge-shaped slider is an abutting inclined surface for abutting the circumferential surface of the drive shaft. The abutting inclined surface has an angle θ with the first direction, where 0 < θ ≤ 30°. The wedge-shaped slider gradually narrows along the direction from the center to the circumference. The abutting inclined surface is used to prevent the drive shaft from sliding and resetting.

[0009] Preferably, the first direction is parallel to the radial direction of the drive gear.

[0010] Preferably, the transmission device further includes a first rotating shaft fixedly inserted in the drive gear, and the mounting seat is sleeved on the first rotating shaft.

[0011] More preferably, the compensating gear is rotatably mounted on the first rotating shaft about its own axis.

[0012] Preferably, the driving gear and the compensating gear abut against each other along their axial direction.

[0013] Preferably, the wedge-shaped slider is used to abut against one side of the limiting member parallel to the first direction.

[0014] Preferably, a pressure plate is provided on the outer end face of the limiting member, and the pressure plate presses against the wedge-shaped slider along the axial direction of the driving gear.

[0015] Preferably, there are at least two limiting members, which are arranged sequentially along the first direction.

[0016] Preferably, the wedge-shaped slider has a protrusion for mounting the elastic element.

[0017] Preferably, the elastic extension direction of the elastic element is parallel to the first direction, and the mounting base is used to abut against one side of the elastic element perpendicular to the first direction.

[0018] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The transmission device of the present invention can automatically compensate for gear backlash. A wedge-shaped slider that can slide along a first direction is provided on the end face of the driving gear. When backlash occurs, the drive shaft is driven to slide along its length direction in the arc-shaped groove by the abutting inclined surface of the wedge-shaped slider in cooperation with the elastic element, thereby realizing automatic compensation for backlash. The rotation of the compensating gear relative to the driving gear is achieved only by providing a drive shaft and an arc-shaped groove on both, respectively. The machining difficulty of the driving gear and the compensating gear is relatively small, and the machining cost is relatively low. Attached Figure Description

[0019] Appendix Figure 1 This is a schematic diagram of the transmission device according to a specific embodiment of the present invention;

[0020] Appendix Figure 2This is a schematic diagram of the structure without clearance compensation;

[0021] Appendix Figure 3 For the appendix Figure 2 Enlarged structural diagram at point A;

[0022] Appendix Figure 4 This is a schematic diagram of the structure after clearance compensation;

[0023] Appendix Figure 5 For the appendix Figure 4 A magnified structural diagram at point B in the middle.

[0024] Among them: 1. Driving gear; 11. Arc groove; 2. Driven gear; 3. Compensating gear; 31. Drive shaft; 4. Drive assembly; 41. Wedge slider; 411. Abutting inclined surface; 412. Protrusion; 42. Mounting base; 43. Elastic element; 44. Limiting element; 441. Pressure plate. Detailed Implementation

[0025] The technical solution of the present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0026] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the embodiments of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0027] In the description of the embodiments of the present invention, it should be understood that the terms "length", "inner", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of the present invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0030] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0031] The following disclosure provides many different implementations or examples for carrying out different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.

[0032] See Figure 1 As shown, this embodiment provides a transmission device that can automatically compensate for gear backlash, including a driving gear 1 and a driven gear 2 that mesh with each other and can rotate about their own axis, and a compensation gear 3 that is coaxially arranged with the driving gear 1. The compensation gear 3 can rotate relative to the driving gear 1 about its own axis, and the axes of the driving gear 1 and the driven gear 2 are parallel to each other.

[0033] In this embodiment, the transmission device further includes a first rotating shaft fixedly inserted in the drive gear 1, and a compensating gear 3 rotatably mounted on the first rotating shaft about its own axis, with the drive gear 1 and the compensating gear 3 abutting against each other along their axial direction.

[0034] The compensating gear 3 and the driven gear 2 mesh with each other. A drive shaft 31, parallel to the axial direction of the driving gear 1, protrudes from the end face of the compensating gear 3 facing the driving gear 1. An arc-shaped groove 11, centered on the axis of the driving gear 1, is formed on the end face of the driving gear 1. The drive shaft 31 can slide within the arc-shaped groove 11 along its length. When the compensating gear 3 rotates relative to the driving gear 1, the drive shaft 31 slides within the arc-shaped groove 11.

[0035] The aforementioned transmission device further includes a drive assembly 4 for driving the drive shaft 31 to slide unidirectionally in the arc-shaped groove 11. The drive assembly 4 includes a wedge-shaped slider 41 slidably disposed on the end face of the drive gear 1 along a first direction, a mounting base 42 protruding from the end face of the drive gear 1, an elastic member 43 with its two ends respectively abutting against the mounting base 42 and the wedge-shaped slider 41, and a limiting member 44 protruding from the end face of the drive gear 1 and used to abut against one side of the wedge-shaped slider 41. The first direction is parallel to the end face of the drive gear 1, and the wedge-shaped slider 41, the elastic member 43, and the mounting base 42 are arranged sequentially along the first direction. The wedge-shaped slider 41 is provided with a protrusion 412 for mounting the elastic member 43.

[0036] In this embodiment, the mounting base 42 is sleeved on the first rotating shaft; the first direction is parallel to the radial direction of the driving gear 1, the elastic extension and contraction direction of the elastic member 43 is parallel to the first direction, and the mounting base 42 is used to abut against one side of the elastic member 43 perpendicular to the first direction.

[0037] There are at least two limiting members 44, arranged sequentially along the first direction. In this embodiment, the wedge-shaped slider 41 is used to abut against one side of the limiting member 44 parallel to the first direction, and there are two limiting members 44, which are spaced apart along the first direction.

[0038] The other side of the wedge slider 41 is an abutting inclined surface 411 for abutting the circumferential surface of the drive shaft 31. The abutting inclined surface 411 has an angle θ with the first direction, where 0 < θ ≤ 30°. The wedge slider 41 gradually narrows along the direction from the center to the circumference. The abutting inclined surface 411 is used to prevent the drive shaft 31 from sliding and resetting.

[0039] In this embodiment, the included angle θ is 5°. This setting enables the compensating gear 3 to self-lock, preventing it from moving in the opposite direction and pushing the wedge-shaped slider 41 downward. After the compensating gear 3 has been properly compensated, it can be regarded as a whole relative to the driving gear 1, and the two can still maintain synchronous rotation.

[0040] In another embodiment, the included angle θ is 15°.

[0041] In this embodiment, a pressure plate 441 is provided on the outer end face of the limiting member 44. The pressure plate 441 presses against the wedge slider 41 along the axial direction of the driving gear 1 to prevent the wedge slider 41 from displacing along the axial direction of the driving gear 1.

[0042] See Figure 2-3 As shown, at this time, the backlash between the gears is not compensated. Under the action of the elastic element 43, the wedge-shaped slider 41 tends to slide upward. During the automatic upward sliding process, the wedge-shaped slider 41 pushes the drive shaft 31 to move outward along the arc-shaped groove 11 through the abutting inclined surface 411, causing the compensating gear 3 to rotate counterclockwise relative to the driving gear 1 until the backlash compensation is completed, that is, the compensation is achieved. Figure 4-5 The state shown.

[0043] It can be seen that during the operation of this transmission device, when the gear surface wears and produces new backlash, the wedge slider 41 can automatically slide outward in the first direction under the drive of the elastic element 43, thereby driving the compensation gear 3 to rotate relative to the driving gear 1, so as to complete the active compensation of backlash.

[0044] This transmission device is used to transfer bottles between various transmission components of the filling equipment. It can meet the customer's requirements for continuous and stable production, eliminate the impact that accompanies the start-up of the equipment, improve the stability of the equipment, and extend the maintenance cycle and service life of the transmission components.

[0045] The working process of this embodiment is described in detail below:

[0046] During operation, when the gear surface wears and produces backlash, the wedge-shaped slider 41 slides in the first direction toward the circumference under the action of the elastic element 43, while simultaneously pressing the drive shaft 31 outward, so that the compensating gear 3 rotates counterclockwise relative to the driving gear 1 until the backlash is eliminated and the relative rotation stops.

[0047] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A transmission device capable of automatically compensating for gear backlash, comprising a driving gear and a driven gear meshing with each other and rotatable about their own axes, and a compensating gear coaxially arranged with the driving gear and rotatable relative to the driving gear about its own axis, wherein the compensating gear and the driven gear mesh with each other, characterized in that: The end face of the compensating gear is provided with a drive shaft parallel to its axial direction, and the end face of the driving gear is provided with an arc-shaped groove with the center located on the axis of the driving gear. The drive shaft can slide through the arc-shaped groove along the length direction of the arc-shaped groove. The transmission device further includes a drive assembly for driving the drive shaft to slide unidirectionally in the arc-shaped groove. The drive assembly includes a wedge-shaped slider slidably disposed on the end face of the drive gear along a first direction, a mounting seat protruding from the end face of the drive gear, an elastic element with its two ends respectively abutting against the mounting seat and the wedge-shaped slider, and a limiting element protruding from the end face of the drive gear and used to abut against one side of the wedge-shaped slider. The wedge-shaped slider, the elastic element and the mounting seat are arranged sequentially along the first direction. The other side of the wedge-shaped slider is an abutting inclined surface for abutting the circumferential surface of the drive shaft. The abutting inclined surface has an angle θ with the first direction, where 0 < θ ≤ 30°. The wedge-shaped slider gradually narrows along the direction from the center to the circumference. The abutting inclined surface is used to prevent the drive shaft from sliding and resetting.

2. The transmission device capable of automatically compensating for gear backlash according to claim 1, characterized in that: The first direction is parallel to the radial direction of the drive gear.

3. The transmission device capable of automatically compensating for gear backlash according to claim 1, characterized in that: The transmission device further includes a first rotating shaft fixedly inserted in the drive gear, and the mounting seat is sleeved on the first rotating shaft.

4. The transmission device capable of automatically compensating for gear backlash according to claim 3, characterized in that: The compensating gear is rotatably mounted on the first rotating shaft about its own axis.

5. The transmission device capable of automatically compensating for gear backlash according to claim 1, characterized in that: The driving gear and the compensating gear abut against each other along their axial direction.

6. The transmission device capable of automatically compensating for gear backlash according to claim 1, characterized in that: The wedge-shaped slider is used to abut against one side of the limiting member, which is parallel to the first direction.

7. The transmission device capable of automatically compensating for gear backlash according to claim 1, characterized in that: The outer end face of the limiting member is provided with a pressure plate, which presses against the wedge-shaped slider along the axial direction of the driving gear.

8. The transmission device capable of automatically compensating for gear backlash according to claim 1, characterized in that: There are at least two limiting members, and they are arranged sequentially along the first direction.

9. The transmission device capable of automatically compensating for gear backlash according to claim 1, characterized in that: The wedge-shaped slider is provided with a protrusion for mounting the elastic element.

10. The transmission device capable of automatically compensating for gear backlash according to claim 1, characterized in that: The elastic extension direction of the elastic element is parallel to the first direction, and the mounting base is used to abut against one side of the elastic element perpendicular to the first direction.

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