Actuator

Abstract

The utility model discloses an actuator, which relates to the technical field of actuators and comprises a motor, a first reducing mechanism and a second reducing mechanism. An output shaft of the motor is perpendicular to an input shaft of the second speed reducing mechanism; the first speed reducing mechanism comprises a first transmission part and a second transmission part, the first transmission part is installed on an output shaft of the motor, the second transmission part is installed on an input shaft of the second speed reducing mechanism, and a shaft of the first transmission part is perpendicular to a shaft of the second transmission part. The first transmission part is meshed with the second transmission part; and the second speed reducing mechanism adopts a one-stage or multi-stage planetary speed reducing mechanism. The utility model has the advantages that the volume of the actuator is reduced, the stability is improved, and the noise is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of actuators, in particular to an actuator. Background Art

[0002] An actuator refers to an integral component that integrates a driving power source with a power transmission mechanism. It is mainly used in places where the installation and operation space is compact, the transmission ratio is large, and the output torque is large. At present, common actuators generally adopt the form of a motor plus a planetary reducer. For example, the patent document with the announcement number CN220488241U discloses an actuator, in which the output of the motor is successively reduced by a first reduction mechanism and a second reduction mechanism to meet the working requirements of a rotating cutting tool. The output shaft of the existing actuator motor is arranged in parallel with the input shaft of the second reduction mechanism, and the transmission is realized through multiple pulleys or multiple gears whose shafts are parallel to each other. This method has a small transmission ratio, and the transmission ratio is only the diameter ratio of the pulley or gear, resulting in a still high output speed of the first reduction mechanism. In addition, the second reduction mechanism needs to use at least two-stage planetary reduction mechanisms to meet the requirements, and the volume of the actuator is still too large; due to the high speed, when the gear transmission is adopted, the gear will generate a large noise; when the pulley transmission is adopted, the belt will become fatigued after a long time of operation, causing the belt to fall off or slip, and the stability is low. Utility Model Content

[0003] The technical problem to be solved by the utility model is how to reduce the volume of the actuator, improve stability and reduce noise.

[0004] The utility model solves the above-mentioned technical problems through the following technical means: an actuator comprises a motor, a first reduction mechanism and a second reduction mechanism; the output shaft of the motor and the input shaft of the second reduction mechanism are perpendicular to each other; the first reduction mechanism comprises a first transmission member and a second transmission member, the first transmission member is installed on the output shaft of the motor, the second transmission member is installed on the input shaft of the second reduction mechanism, the axes of the first transmission member and the second transmission member are perpendicular to each other, and the first transmission member is meshed with the second transmission member; the second reduction mechanism adopts a single-stage or multi-stage planetary reduction mechanism.

[0005] Preferably, the first transmission member is a worm, and the second transmission member is a worm wheel.

[0006] Preferably, the first transmission member is a spur gear or a helical gear, and the second transmission member is a crown gear.

[0007] Preferably, the first transmission member and the second transmission member are both bevel gears, and the diameter of the first transmission member is smaller than the diameter of the second transmission member.

[0008] Preferably, the actuator further comprises a bracket, the first reduction mechanism is mounted at the bottom of the bracket, the second reduction mechanism is mounted at the top of the bracket, and the motor is mounted on the side of the bracket.

[0009] Preferably, the second reduction mechanism adopts a first-stage planetary reduction mechanism, including a transmission shaft, a sun gear, a planetary gear, a mounting frame, an actuator output shaft, a support cover and an inner gear ring; the transmission shaft is the input shaft of the second reduction mechanism, the transmission shaft passes through the support and is rotatably connected to the support; the second transmission member is installed at the end of the transmission shaft passing through the bottom of the support, and the sun gear is installed at the end of the transmission shaft passing through the top of the support; there are multiple planetary gears, each planetary gear surrounds the outer periphery of the sun gear and is respectively meshed with the sun gear, each planetary gear is respectively mounted on the connecting shaft at the bottom of the mounting frame, and the actuator output shaft is fixedly connected to the top of the mounting frame; the support cover is fixedly connected to the support, the actuator output shaft passes through the support cover and is rotatably connected to the support cover; the inner periphery of the support cover is provided with an inner gear ring, and each planetary gear is respectively meshed with the inner gear ring.

[0010] Preferably, the second reduction mechanism adopts a multi-stage planetary reduction mechanism, including a transmission shaft, a sun gear, a planetary gear, a mounting frame, an actuator output shaft, a support cover and an inner gear ring, and the sun gear, planetary gear and mounting frame are each provided with multiple groups; the transmission shaft is the input shaft of the second reduction mechanism, the transmission shaft passes through the bracket and is rotatably connected to the bracket; the second transmission member is installed at the end of the transmission shaft passing through the bottom of the bracket, and the first group of sun gears is installed at the end of the transmission shaft passing through the top of the bracket; each group of planetary gears is provided with multiple, each group of planetary gears surrounds the outer periphery of the corresponding group of sun gears and is respectively meshed with the corresponding group of sun gears, and each group of planetary gears is respectively installed on the connecting shaft at the bottom of the corresponding group of mounting frames, and each group of sun gears after the first group is respectively fixedly connected to the top of the previous group of mounting frames, and the actuator output shaft is fixedly connected to the top of the last group of mounting frames; each group of planetary gears is arranged at intervals up and down and each planetary gear is respectively meshed with the inner gear ring.

[0011] Preferably, the actuator also includes a bottom cover, a first mounting cavity is provided at the bottom of the bracket, the first transmission member and the second transmission member are both arranged in the first mounting cavity, and the bottom cover closes the opening of the first mounting cavity; a second mounting cavity is provided at the top of the bracket, the transmission shaft, the sun gear, the planetary gear and the mounting frame are all arranged in the second mounting cavity, and the support cover closes the opening of the second mounting cavity; a first connecting ear is distributed on the periphery of the support cover, and the support cover matches the shape of the second mounting cavity and is inserted into the second mounting cavity; a connecting column is provided at the bottom of the bracket corresponding to the position of the first connecting ear, and a second connecting ear is distributed on the periphery of the bottom cover, and the second connecting ear is sleeved on the outside of the connecting column; the bottom cover, the bracket and the support cover are fixed together by a connecting member passing through the corresponding second connecting ear, the connecting column and the first connecting ear.

[0012] Preferably, the second reduction mechanism further includes a gasket, which is sleeved on the outer circumference of the transmission shaft and is separated between the bracket and the sun gear.

[0013] Preferably, the second reduction mechanism further comprises a spacer sleeve, which is sleeved on the outer circumference of the actuator output shaft and is separated between the mounting frame and the support cover.

[0014] The advantages of the utility model are:

[0015] 1. The output speed and output torque of the motor are sequentially transmitted through the first reduction mechanism and the second reduction mechanism, thereby reducing the output speed and increasing the output torque. A small motor can be used to meet the low speed and high torque working requirements of the rotary cutting tool; the transmission ratio of the first transmission member and the second transmission member whose axes are perpendicular to each other is much larger than that of the parallel transmission pulley or gear, which greatly reduces the output speed of the first reduction mechanism. Therefore, the second reduction mechanism only needs to adopt a one-stage planetary reduction mechanism to meet the requirements that could only be met by a two-stage planetary reduction mechanism in the past, reducing the size of the actuator, improving stability and reducing noise.

[0016] 2. The number of planetary stages of the second reduction mechanism can be increased or decreased according to actual use requirements, and one or more planetary gear sets can be used to achieve different output transmission ratios, which is convenient and flexible.

[0017] 3. The arrangement of the bracket, the motor, the first reduction mechanism, the second reduction mechanism and the bottom cover is compact, easy to disassemble and assemble, small in size, and easy to adapt to different usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an axonometric view of an actuator according to Embodiment 1 of the present utility model.

[0019] Figure 2 This is an exploded view of an actuator according to Embodiment 1 of the present utility model.

[0020] Figure 3 This is an axonometric view of the actuator in the reverse state according to the first embodiment of the utility model.

[0021] Figure 4 This is an exploded view of the actuator in the reverse state according to the first embodiment of the present utility model.

[0022] Figure 5 This is an axonometric view of the first reduction mechanism in the reverse state of the second embodiment of the utility model.

[0023] Figure 6 This is an axonometric view of the first reduction mechanism in the reverse state of the third embodiment of the utility model.

[0024] Figure 7 This is an exploded view of the actuator of the fourth embodiment of the utility model. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described in combination with the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the utility model.

[0026] Embodiment 1

[0027] like Figures 1 to 4 As shown, this embodiment discloses an actuator, including a bracket 1, a motor 2, a first reduction mechanism 3, a second reduction mechanism 4 and a bottom cover 5.

[0028] The first reduction mechanism 3 is installed at the bottom of the bracket 1, and the bottom cover 5 cooperates with the bracket 1 to close the first reduction mechanism 3. The second reduction mechanism 4 is installed on the top of the bracket 1. The motor 2 is installed on the side of the bracket 1. The output shaft of the motor 2 and the input shaft of the second reduction mechanism 4 are perpendicular to each other. The output speed and output torque of the motor 2 are transmitted through the first reduction mechanism 3 and the second reduction mechanism 4 in turn, thereby reducing the output speed and increasing the output torque. A small motor can meet the low speed and high torque working requirements of the rotary cutting tool.

[0029] The first reduction mechanism 3 includes a first transmission member 301 and a second transmission member 302; the first transmission member 301 is installed on the output shaft of the motor 2, and the second transmission member 302 is installed on the input shaft of the second reduction mechanism 4, the axes of the first transmission member 301 and the second transmission member 302 are perpendicular to each other, and the first transmission member 301 and the second transmission member 302 are meshed; the first transmission member 301 adopts a worm, and the second transmission member 302 adopts a worm wheel.

[0030] The second reduction mechanism 4 adopts a first-stage planetary reduction mechanism, including a gasket 401, a transmission shaft 402, a sun gear 403, a planetary gear 404, a mounting frame 405, an actuator output shaft 406, a spacer 407, a support cover 408, an inner gear ring 409 and a first connecting ear 410; the transmission shaft 402 is the input shaft of the second reduction mechanism 4, the transmission shaft 402 passes through the bracket 1 and is rotatably connected to the bracket 1 through a bearing; the second transmission member 302 is installed at one end of the transmission shaft 402 passing through the bottom of the bracket 1, the sun gear 403 is installed at one end of the transmission shaft 402 passing through the top of the bracket 1, and the gasket 401 is sleeved on the outer periphery of the transmission shaft 402 and separated between the bracket 1 and the sun gear 403. There are three planetary gears 404, each of which surrounds the outer periphery of the sun gear 403 and meshes with the sun gear 403 respectively, and each of the planetary gears 404 is respectively mounted on the connecting shaft at the bottom of the mounting frame 405, and the actuator output shaft 406 is fixedly connected to the top of the mounting frame 405; the support cover 408 is fixedly connected to the bracket 1, the actuator output shaft 406 penetrates the support cover 408 and is rotatably connected to the support cover 408 through a bearing, and the spacer 407 is sleeved on the outer periphery of the actuator output shaft 406 and separated between the mounting frame 405 and the support cover 408; the inner periphery of the support cover 408 is provided with an inner gear ring 409, and each of the planetary gears 404 meshes with the inner gear ring 409 respectively.

[0031] The bottom of the bracket 1 is provided with a first installation cavity 101, the first transmission member 301 and the second transmission member 302 are both arranged in the first installation cavity 101, and the bottom cover 5 closes the opening of the first installation cavity 101; the support cover 408 matches the shape of the second installation cavity 102 and is inserted into the second installation cavity 102; the top of the bracket 1 is provided with a second installation cavity 102, the gasket 401, the transmission shaft 402, the sun gear 403, the planetary gear 404, the mounting frame 405 and the spacer 407 are all arranged in the second installation cavity 102, The support cover 408 closes the opening of the second installation cavity 102, and three first connecting ears 410 are evenly distributed on the periphery of the support cover 408; connecting columns 103 are respectively provided at the bottom of the bracket 1 corresponding to the positions of each first connecting ear 410, and three second connecting ears 501 are evenly distributed on the periphery of the bottom cover 5, and each second connecting ear 501 is respectively sleeved on the outside of the connecting column 103; the bottom cover 5, the bracket 1 and the support cover 408 are fixed together by connecting parts passing through the corresponding second connecting ears 501, the connecting columns 103 and the first connecting ears 410.

[0032] Working principle: the output shaft of the motor 2 drives the worm wheel to rotate through the worm, the worm wheel drives the sun gear 403 to rotate through the transmission shaft 402, and then drives the planetary gear 404 to rotate along the inner ring 409, the planetary gear 404 drives the actuator output shaft 406 to rotate through the mounting frame 405, and finally outputs a large transmission ratio of 1:500 through the actuator output shaft 406, and outputs a large torque of 30n.m at the same time. Since the transmission of the worm wheel and the worm is much larger than that of the parallel transmission pulley or gear, the output speed of the first reduction mechanism 3 is greatly reduced, so the second reduction mechanism 4 only needs to adopt a one-stage planetary reduction mechanism to meet the needs that could only be met by a two-stage planetary reduction mechanism in the past, reducing the size of the actuator, improving stability, and reducing noise.

[0033] Embodiment 2

[0034] like Figure 5 As shown, the difference between this embodiment and the first embodiment is that:

[0035] The first transmission member 301 is a spur gear or a helical gear, and the second transmission member 302 is a crown gear.

[0036] Working principle: the output shaft of the motor 2 drives the crown gear to rotate through the spur gear or the helical gear, the crown gear drives the sun gear 403 to rotate through the transmission shaft 402, and then drives the planetary gear 404 to rotate along the inner ring 409, the planetary gear 404 drives the actuator output shaft 406 to rotate through the mounting frame 405, and finally outputs a large transmission ratio of 1:500 through the actuator output shaft 406, and outputs a large torque of 30n.m at the same time. Since the transmission ratio of the spur gear or the helical gear and the crown gear is much larger than that of the parallel transmission pulley or gear, the output speed of the first reduction mechanism 3 is greatly reduced, so the second reduction mechanism 4 only needs to adopt a one-stage planetary reduction mechanism to meet the needs that could only be met by a two-stage planetary reduction mechanism in the past, reducing the size of the actuator, improving stability, and reducing noise.

[0037] Embodiment 3

[0038] like Figure 6 As shown, the difference between this embodiment and the first embodiment is that:

[0039] The first transmission member 301 and the second transmission member 302 are both bevel gears, and the diameter of the first transmission member 301 is smaller than the diameter of the second transmission member 302 .

[0040] Working principle: the output shaft of the motor 2 drives the large bevel gear to rotate through the small bevel gear, and the large bevel gear drives the sun gear 403 to rotate through the transmission shaft 402, and then drives the planetary gear 404 to rotate along the inner ring 409, and the planetary gear 404 drives the actuator output shaft 406 to rotate through the mounting frame 405, and finally outputs a large transmission ratio of 1:500 through the actuator output shaft 406, and outputs a large torque of 30n.m at the same time. Since the transmission ratio of the small bevel gear and the large bevel gear is much larger than that of the parallel transmission pulley or gear, the output speed of the first reduction mechanism 3 is greatly reduced, so the second reduction mechanism 4 only needs to adopt a one-stage planetary reduction mechanism to meet the needs that could only be met by a two-stage planetary reduction mechanism in the past, reducing the size of the actuator, improving stability, and reducing noise.

[0041] Embodiment 4

[0042] like Figure 7 As shown, the difference between this embodiment and the first embodiment is that:

[0043] The second reduction mechanism 4 adopts a multi-stage planetary reduction mechanism, such as a two-stage, three-stage, or four-stage planetary reduction mechanism, to achieve a larger output transmission ratio and a larger transmission torque.

[0044] The sun gear 403, the planetary gear 404 and the mounting frame 405 are each provided with multiple groups; the first group of sun gears 403 is installed at one end of the transmission shaft 402 passing through the top of the bracket 1; each group of planetary gears 404 is provided with three, each group of planetary gears 404 surrounds the outer periphery of the corresponding group of sun gears 403 and is respectively meshed with the corresponding group of sun gears 403, and each group of planetary gears 404 is respectively installed on the three connecting shafts at the bottom of the corresponding group of mounting frames 405, and each group of sun gears 403 after the first group is respectively fixedly connected to the top of the previous group of mounting frames 405, and the actuator output shaft 406 is fixedly connected to the top of the last group of mounting frames 405; each group of planetary gears 404 is arranged at intervals up and down and each planetary gear 404 is respectively meshed with the inner ring gear 409.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An actuator, characterized in that: It comprises a motor, a first reduction mechanism and a second reduction mechanism; the output shaft of the motor and the input shaft of the second reduction mechanism are perpendicular to each other; the first reduction mechanism comprises a first transmission member and a second transmission member, the first transmission member is mounted on the output shaft of the motor, the second transmission member is mounted on the input shaft of the second reduction mechanism, the axes of the first transmission member and the second transmission member are perpendicular to each other, and the first transmission member is meshed with the second transmission member; the second reduction mechanism adopts a single-stage or multi-stage planetary reduction mechanism; The actuator further comprises a bracket, the first reduction mechanism is mounted on the bottom of the bracket, the second reduction mechanism is mounted on the top of the bracket, and the motor is mounted on the side of the bracket; The second reduction mechanism adopts a single-stage or multi-stage planetary reduction mechanism, including a transmission shaft, a sun gear, a planetary gear, a mounting frame, an actuator output shaft, a support cover and an inner gear ring; the transmission shaft is the input shaft of the second reduction mechanism, the transmission shaft passes through the support and is rotatably connected to the support; the second transmission member is installed at one end of the transmission shaft passing through the bottom of the support; the support cover is fixedly connected to the support, the actuator output shaft passes through the support cover and is rotatably connected to the support cover, and an inner gear ring is provided on the inner periphery of the support cover; The sun gear is mounted on one end of the transmission shaft passing through the top of the bracket; there are multiple planetary gears, each planetary gear surrounds the outer circumference of the sun gear and meshes with the sun gear respectively, each planetary gear is mounted on a connecting shaft at the bottom of the mounting frame, and the actuator output shaft is fixedly connected to the top of the mounting frame; Each planetary gear is meshed with the inner gear ring respectively; Or the first group of sun gears is installed at one end of the transmission shaft passing through the top of the bracket; each group of planetary gears is provided with a plurality of planetary gears, each group of planetary gears surrounds the outer circumference of the corresponding group of sun gears and meshes with the corresponding group of sun gears respectively, each group of planetary gears is respectively installed on the connecting shaft at the bottom of the corresponding group of mounting frames, each group of sun gears after the first group is respectively fixedly connected to the top of the previous group of mounting frames, and the actuator output shaft is fixedly connected to the top of the last group of mounting frames; each group of planetary gears is arranged at intervals up and down and each planetary gear is respectively meshed with the inner gear ring; The actuator also includes a bottom cover, a first mounting cavity is provided at the bottom of the bracket, the first transmission member and the second transmission member are both arranged in the first mounting cavity, and the bottom cover closes the opening of the first mounting cavity; a second mounting cavity is provided at the top of the bracket, the transmission shaft, the sun gear, the planetary gear and the mounting frame are all arranged in the second mounting cavity, and the support cover closes the opening of the second mounting cavity; a first connecting ear is distributed on the periphery of the support cover, and the support cover matches the shape of the second mounting cavity and is inserted into the second mounting cavity; a connecting column is provided at the bottom of the bracket corresponding to the position of the first connecting ear, and a second connecting ear is distributed on the periphery of the bottom cover, and the second connecting ear is sleeved on the outside of the connecting column; the bottom cover, the bracket and the support cover are fixed together by a connecting member passing through the corresponding second connecting ear, the connecting column and the first connecting ear.

2. The actuator according to claim 1, characterized in that: The first transmission member is a worm, and the second transmission member is a worm wheel.

3. The actuator according to claim 1, characterized in that: The first transmission member is a spur gear or a helical gear, and the second transmission member is a crown gear.

4. The actuator according to claim 1, characterized in that: The first transmission member and the second transmission member are both bevel gears, and the diameter of the first transmission member is smaller than the diameter of the second transmission member.

5. The actuator according to claim 1, characterized in that: The second reduction mechanism further includes a gasket, which is sleeved on the outer circumference of the transmission shaft and is separated between the bracket and the sun gear.

6. The actuator according to claim 1, characterized in that: The second reduction mechanism further includes a spacer sleeve, which is sleeved on the outer circumference of the actuator output shaft and is separated between the mounting frame and the support cover.

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