A side gap adjustable end face logarithmic spiral movable tooth transmission device

Abstract

The application provides a side gap adjustable end face logarithmic spiral movable tooth transmission device, which comprises a transmission assembly, a shell allowing the movable tooth to pass through, and a lubricating assembly comprising an elastic expansion piece and an abutting assembly. The elastic expansion piece is arranged in a lubricating hole and can abut against the hole wall of the lubricating hole. The abutting assembly is connected with one end of the elastic expansion piece and abuts against the shell with the other end. The surface abutting against the shell with the other end is a slope. The movable tooth rotation area in the circumferential direction comprises a top area and a bottom area. When the movable tooth drives the lubricating assembly to rotate in the bottom area, the lubricating assembly restores the deformation and is elongated to push the abutting assembly to approach the slope, thereby releasing space for the lubricating oil to enter the lubricating hole. When the movable tooth drives the lubricating assembly to rotate in the top area, the lubricating assembly is compressed by the slope, so that the elastic expansion piece is shortened and the abutting assembly moves to the lubricating hole to extrude the lubricating oil in the lubricating hole and make it be discharged to the meshing tooth surface of the inner gear ring.

Description

Technical Field

[0001] This application relates to the field of mechanical transmission technology, and in particular to a helical tooth transmission device with adjustable backlash and a number of end faces. Background Technology

[0002] End-face number helical reducers, due to their unique transmission characteristics, possess advantages such as zero backlash (theoretically), compact structure, high load capacity, and wide speed range, and have broad application prospects. The meshing transmission between the moving gear and the internal gear ring is the key link in realizing power transmission. Typically, both the moving gear and the internal gear ring are made of materials with high rigidity to ensure structural stability and transmission accuracy under high load conditions. Because there are many contact points and a large contact area during meshing, significant friction and wear are easily generated during long-term operation, placing high demands on lubrication conditions.

[0003] Currently, oil lubrication is a common method to improve gear meshing performance, reduce wear, and extend service life. However, in certain transmission devices with specific structures, especially those where the internal gear ring is fixed to the frame and the cage operates at low speeds, the supply of lubricating oil faces significant challenges. Due to the low rotational speed of the cage, its ability to carry lubricating oil is limited, making it difficult to effectively deliver lubricating oil to the upper region of the internal gear ring. Under stable operation without severe shaking, lubricating oil mainly accumulates in the lower part of the internal gear ring, resulting in insufficient lubrication in the upper region. This uneven lubrication means that the moving teeth and the internal gear ring lack effective oil film protection in the upper meshing area, leading to localized dry friction, abnormal wear, and even tooth surface scuffing or pitting, severely affecting transmission accuracy and device reliability. Summary of the Invention

[0004] In view of this, this application provides a helical gear transmission device with adjustable backlash and a number of end faces, which overcomes the problem of lack of effective oil film protection between the moving teeth and the internal gear ring in the upper meshing area, improves transmission accuracy, and extends the service life of the device.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A helical gear transmission device with adjustable backlash and a number of end faces, comprising:

[0007] The transmission assembly includes a movable tooth, a cage that rotates synchronously with the movable tooth, and an internal gear ring that meshes with the movable tooth. The cage has a lubrication hole and a fixing hole that allows the movable tooth to pass through. The lubrication hole is located on the outer periphery of the fixing hole.

[0008] The housing allows the movable teeth to pass through;

[0009] The lubricating assembly comprises an elastic telescopic member and an abutting assembly, the elastic telescopic member is arranged in the lubricating hole and can abut against the hole wall of the lubricating hole, one end of the abutting assembly is connected with the end of the elastic telescopic member, and the other end of the abutting assembly abuts against the inclined surface, and the surface of the housing abutting against the other end is an inclined surface;

[0010] The region where the movable tooth rotates in the circumferential direction comprises a top region and a bottom region, when the movable tooth drives the lubricating assembly to rotate in the bottom region, the lubricating assembly restores the deformation and is elongated to push the abutting assembly to be close to the inclined surface, so that the length of the abutting assembly in the lubricating hole is reduced to release space for the lubricating oil to enter the lubricating hole; when the movable tooth drives the lubricating assembly to rotate in the top region, the lubricating assembly is compressed by the inclined surface, so that the elastic telescopic member is shortened, and the abutting assembly moves into the lubricating hole, so that the length of the abutting assembly in the lubricating hole is increased to extrude the lubricating oil in the lubricating hole and make it be discharged to the meshing tooth surface of the inner gear ring.

[0011] Optionally, in the side gap adjustable face-to-face helical movable tooth transmission device, the lubricating assembly comprises:

[0012] The elastic telescopic member is arranged in the lubricating hole and can abut against the hole wall of the lubricating hole;

[0013] The abutting assembly is connected with one end of the elastic telescopic member and abuts against the other end of the inclined surface.

[0014] Optionally, in the side gap adjustable face-to-face helical movable tooth transmission device, the abutting assembly comprises:

[0015] The abutting part is in surface contact with the inclined surface;

[0016] The connecting part is hingedly connected with the abutting part at one end and fixedly connected with the elastic telescopic member at the other end.

[0017] Optionally, in the side gap adjustable face-to-face helical movable tooth transmission device, the transmission assembly further comprises a groove cam, and the outer peripheral wall of the groove cam is provided with a groove;

[0018] When the movable tooth rotates in a first direction, the first side wall of the groove pushes the movable tooth; when the movable tooth rotates in a second direction, the second side wall of the groove pulls the movable tooth, the first direction is opposite to the second direction, and the first side wall and the second side wall are oppositely arranged.

[0019] Optionally, in the side clearance adjustable face-tooth logarithmic spiral movable tooth transmission device, the movable tooth comprises a first end engaged in transmission with the inner gear ring, and a second end arranged away from the first end, and the movable tooth is connected with a roller bearing which is rollably accommodated in the groove.

[0020] Optionally, in the side clearance adjustable face-tooth logarithmic spiral movable tooth transmission device, the side clearance adjustable face-tooth logarithmic spiral movable tooth transmission device further comprises a clearance adjusting assembly for adjusting the clearance between the inner gear ring and the movable tooth.

[0021] Optionally, in the side clearance adjustable face-tooth logarithmic spiral movable tooth transmission device, the outer peripheral wall of the inner gear ring is provided with a first external thread.

[0022] The clearance adjusting assembly comprises:

[0023] a mounting frame for fixing the inner gear ring in the circumferential direction, and the outer peripheral wall of the mounting frame is provided with a second external thread;

[0024] a screwing piece comprising a first part screwed with the inner gear ring, and a second part screwed with the mounting frame, and the first part and the second part are connected;

[0025] wherein the pitches of the first external thread and the second external thread are different.

[0026] Optionally, in the side clearance adjustable face-tooth logarithmic spiral movable tooth transmission device, the pitch of the first external thread is 1.45 mm, and the pitch of the second external thread is 1.5 mm.

[0027] Optionally, in the side clearance adjustable face-tooth logarithmic spiral movable tooth transmission device, the inner gear ring and the mounting frame are connected by spline.

[0028] Optionally, in the side clearance adjustable face-tooth logarithmic spiral movable tooth transmission device, a line in the groove and equidistant from the first side wall and the second side wall is a theoretical profile line, the theoretical profile line is a logarithmic spiral line, the groove is formed by axially sweeping the theoretical profile line, the first end face of the movable tooth and the second end face of the inner gear ring are both engagement faces formed based on the logarithmic spiral line, and the first end face and the second end face are engaged in transmission.

[0029] The application provides a side gap adjustable end face logarithmic helical movable tooth transmission device, a fixed hole allowing the movable tooth to pass through and a lubricating hole for lubricating assembly extension are arranged on the retainer, and the surface for abutting against the lubricating assembly is a slope arranged on the shell, when the movable tooth passes through the fixed hole and drives the lubricating assembly to rotate in the bottom area, the lubricating assembly restores deformation and extends to push the abutting assembly to the slope to release space for lubricating oil entering the lubricating hole, when the movable tooth drives the lubricating assembly to rotate in the top area, the lubricating assembly is compressed by the slope, the elastic extension part is shortened, and the abutting assembly moves to the lubricating hole to extrude the lubricating oil in the lubricating hole and make the lubricating oil be discharged to the meshing tooth surface of the inner gear ring. The movable tooth drives the lubricating assembly to move circularly between the top area and the bottom area, thus, the problem that the movable tooth and the inner gear ring lack effective oil film protection in the top meshing area is solved, the transmission precision is improved, and the service life of the device is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on the provided drawings.

[0031] Figure 1 The application provides a schematic diagram of a partial section of the device;

[0032] Figure 2 The application provides a schematic diagram of the structure of the transmission assembly;

[0033] Figure 3 The application provides a schematic diagram of the structure of the gap adjusting assembly;

[0034] Figure 4 The application provides a schematic diagram of the groove cam;

[0035] Figure 5 The application provides a schematic diagram of the inner gear ring;

[0036] Figure 6 The application provides a schematic diagram of the structure of the roller bearing and the movable tooth;

[0037] Figure 7 The application provides a schematic diagram of the retainer;

[0038] Figure 8 The application provides a schematic diagram of the section; Figure 7

[0039] Figure 9 The application provides a schematic diagram of the structure of the retainer provided with the lubricating assembly.​

[0040] In Figures 1-9 the present application, a side gap adjustable end face logarithmic spiral movable tooth transmission device is provided.

[0041] 1, movable tooth; 2, retainer; 3, inner gear ring; 4, lubricating hole; 5, fixing hole; 6, lubricating assembly; 7, shell; 8, groove cam; 9, groove; 10, roller bearing; 11, mounting frame; 12, screw; 13, lock nut; 14, first housing; 15, second housing; 16, first angular contact bearing; 17, second angular contact bearing; 18, crossed roller bearing; 19, end cover. DETAILED DESCRIPTION

[0042] The present application provides a side gap adjustable end face logarithmic spiral movable tooth transmission device, which overcomes the problem of lack of effective oil film protection in the top meshing area of the movable tooth and the inner gear ring, improves the transmission precision, and prolongs the service life of the device.

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0044] As Figures 1-9 shown, the present application provides a side gap adjustable end face logarithmic spiral movable tooth transmission device, which includes: a transmission assembly, including a movable tooth 1, a retainer 2 rotating synchronously with the movable tooth 1, and an inner gear ring 3 meshing with the movable tooth 1 for transmission, the retainer 2 is provided with a lubricating hole 4 and a fixing hole 5 allowing the movable tooth 1 to pass through, the lubricating hole 4 is located at the outer periphery of the fixing hole 5; a shell 7 allowing the movable tooth 1 to pass through; a lubricating assembly 6 including an elastic expansion piece and an abutting assembly, the elastic expansion piece is arranged in the lubricating hole 4 and can abut against the hole wall of the lubricating hole 4, the abutting assembly is connected to one end of the elastic expansion piece and abuts against the shell 7 at the other end, and the surface of the shell 7 abutting against the other end is an inclined surface; wherein the region of the movable tooth 1 rotating in the circumferential direction includes a top region and a bottom region, when the movable tooth 1 drives the lubricating assembly 6 to rotate in the bottom region, the lubricating assembly 6 restores deformation and elongates to push the abutting assembly to approach the inclined surface, so that the length of the abutting assembly located in the lubricating hole 4 is reduced to release space for the lubricating oil entering the lubricating hole 4; when the movable tooth 1 drives the lubricating assembly 6 to rotate in the top region, the lubricating assembly 6 is compressed by the inclined surface, so that the elastic expansion piece is shortened and the abutting assembly moves towards the lubricating hole 4, so that the length of the abutting assembly located in the lubricating hole 4 is increased to squeeze the lubricating oil in the lubricating hole 4 and make it discharge to the meshing tooth surface of the inner gear ring 3.

[0045] It should be noted that the side gap adjustable end face pair of logarithmic spiral movable tooth transmission device has lubricating oil, in the transmission device static state, and in the vertical direction, the bottom area refers to the area where the inner ring gear 3 is in contact with the lubricating oil, and the top area refers to the area where the inner ring gear 3 is not in contact with the lubricating oil. It can also be understood that, under the premise that the transmission device is not provided with a lubricating assembly 6, when the transmission device is in transmission, the area where the movable tooth 1 and the inner ring gear 3 mesh has lubricating oil, and the area where the movable tooth 1 and the inner ring gear 3 mesh does not have lubricating oil.

[0046] As shown in Figure 1 , the holder 2 is an approximately symmetrical part as a whole, both sides of the holder 2 are machined with shaft shoulders to cooperate with the angular contact bearings (the first angular contact bearing 16 and the second angular contact bearing 17) in the vertical direction, a threaded hole is opened on the right side of the holder 2 to be fixed with the output end through bolts, that is, the holder 2 serves as an output end to transmit output torque, a fixed hole 5 is opened in the middle of the holder 2 to cooperate with the movable tooth 1 to realize the radial fixation of the movable tooth 1. The lubricating hole 4 is arranged on the outer periphery of the fixed hole 5, and the lubricating assembly 6 is arranged in the lubricating hole 4. The lubricating assembly 6 can be an elastic bag type lubricating assembly 6 or a composite structure composed of capillary porous material and elastomer. Specifically, when the lubricating assembly 6 is an elastic bag type lubricating assembly, the elastic bag type lubricating assembly includes a flexible elastic bag body arranged in the lubricating hole 4, a one-way oil inlet valve (only inlet but no outlet) arranged at the first end of the flexible elastic bag body, and a compression assembly arranged at the second end of the flexible elastic bag body. The compression assembly includes a spring and an end face fixedly connected with the spring, the end face is used to abut against the inclined surface, the flexible elastic bag body is connected with the one-way oil inlet valve and allows the lubricating oil to flow into the flexible elastic bag body from the one-way oil inlet valve.

[0047] Due to the rotation of the movable tooth 1 and the weight of the lubricating assembly 6, the lubricating assembly 6 generates a centrifugal force in the rotating process, and the direction of the centrifugal force is radially outward. At the same time, the end of the lubricating assembly 6 is in contact with the inclined surface of the housing 7, and the lubricating assembly 6 is subjected to the centrifugal force in the radial outward direction, which can be decomposed into two forces. The first component force: presses the lubricating assembly 6 towards the inclined surface, and the second component force: the force in the direction of abutting against the inclined surface, the second component force is offset by the restraining action of the lubricating hole 4 on the lubricating assembly 6. In this way, the end of the lubricating assembly 6 can always abut against the inclined surface and move without leaving the inclined surface.

[0048] More specifically, as shown in Figure 2 , Figure 8 and Figure 9As shown, the holder 2 is provided with a fixed hole 5 allowing the movable tooth 1 to pass through, and a lubricating hole 4 for the lubricating assembly 6 to extend and retract. The housing 7 is provided with a slope, and the slope direction can be understood as a slope formed by counterclockwise rotation of a vertical plane, and the counterclockwise rotation angle is less than 90° (here, the rotation angle is not specifically limited, and is only limited to helping understand the slope direction). When the movable tooth 1 rotates to the bottom region, the lubricating assembly 6 abuts against the slope of the housing 7 located in the bottom region, and at this time, the distance between the slope and the wall of the holder 2 provided with the lubricating hole 4 and facing the slope is a first distance. The lubricating assembly 6 in the lubricating hole 4 is subjected to a first component force, and due to the presence of the slope, the whole lubricating assembly 6 moves relative to the lubricating hole 4, as shown in Figure 1 As shown, the lubricating assembly 6 moves to the left, and thus, the lubricating assembly 6 releases space for the lubricating oil to enter the lubricating hole 4. The lubricating oil enters the lubricating hole 4. As the movable tooth 1 rotates to the top region, the distance between the slope and the wall of the holder 2 provided with the lubricating hole 4 and facing the slope is a second distance, which is less than the first distance. Under the extrusion of the slope, the length of the part of the lubricating assembly 6 in the lubricating hole 4 increases, that is, the lubricating assembly 6 moves relative to the lubricating hole 4, as shown in Figure 1 As shown, the lubricating assembly 6 moves to the right, and thus, the lubricating assembly 6 extrudes the lubricating oil, so that the previously entered lubricating oil is discharged to the meshing tooth surface of the movable tooth 1 and the inner tooth ring 3. In this way, the problem of lack of effective oil film protection of the movable tooth 1 and the inner tooth ring 3 in the upper meshing region is overcome, the transmission accuracy is improved, and the service life of the device is prolonged.

[0049] It should be noted that when stationary, one end of the lubricating assembly 6 abuts against the lubricating hole 4, and the other end abuts against the slope. The holder 2 of the lubricating assembly 6 is circumferentially provided with a plurality of.

[0050] The first housing 14, the housing 7, and the second housing 15 are fixed by bolt connection. The cross roller bearing 18 is fixed by the first housing 14, the housing 7, the end cover 19, and the groove cam 8.

[0051] As shown in Figure 1 The lubricating assembly 6 includes: an elastic extension member arranged in the lubricating hole 4 and capable of abutting against the hole wall of the lubricating hole 4; and an abutting assembly having one end connected to the end of the elastic extension member and the other end abutting against the slope. The elastic extension member is a spring. Firstly, the elastic extension member is used to buffer the abutment of the lubricating assembly 6 and the lubricating hole 4, and prolong the service life of the device. Secondly, the elastic extension member has a certain volume, which can extend and retract under the action of centrifugal force, and makes a certain contribution to the entry and exit of the lubricating oil. The end of the abutting assembly abutting against the slope can be a slope or a circular protrusion.

[0052] The above structure is simple, and when the movable tooth 1 rotates, the extension principle is also relatively simple and reliable.

[0053] More specifically, the abutting assembly comprises: an abutting part in surface contact with the inclined surface; a connecting part hingedly connected to the abutting part at one end and fixedly connected to the elastic telescopic part at the other end.

[0054] It is understood that the abutting part is an inclined end surface, specifically, the abutting part comprises two parallel vertical walls provided by the end surface and the protruding end surface, and a first hole is formed on each of the two vertical walls. The shape of the end surface can be circular, square or irregular, etc. The surface contact between the inclined surface and the abutting part increases the contact area with the inclined surface of the housing 7, thereby increasing the reliability of the lubricating assembly 6.

[0055] As shown in Figure 9 , the connecting part is a protruding part comprising a columnar part and a protruding columnar part, the protruding part is protrudingly arranged along the length direction of the columnar part, and a second hole is formed in the protruding part. A threaded member such as a bolt or a screw is inserted through the first hole and the second hole, and a fastener such as a nut is connected to the threaded member (the threaded region of the bolt or screw is limited to ensure the hinged connection between the connecting part and the abutting part). Alternatively, to improve the reliability of the lubricating assembly 6, a pin shaft can be inserted through the first hole and the second hole, and the fastener is welded on the pin shaft. In this way, the abutting part and the connecting part are hingedly connected, which increases the flexibility of the lubricating assembly 6 and reduces wear.

[0056] The other end of the connecting part is fixedly connected to the elastic telescopic part, thereby increasing the firmness of the lubricating assembly 6.

[0057] In an optional embodiment, as shown in Figure 2 and Figure 4 , the transmission assembly further comprises a groove cam 8, and an outer peripheral wall of the groove cam 8 is provided with a groove 9. When the movable tooth 1 rotates in a first direction, a first side wall of the groove 9 pushes the movable tooth 1. When the movable tooth 1 rotates in a second direction, a second side wall of the groove 9 pulls the movable tooth 1. The first direction is opposite to the second direction, and the first side wall and the second side wall are oppositely arranged. It should be noted that the first direction is one of the clockwise direction and the counterclockwise direction, and the second direction is the other of the clockwise direction and the counterclockwise direction. The first side wall (as a driving surface) refers to the wall surface away from the meshing end of the movable tooth 1, and the second side wall (as a return surface) refers to the wall surface closer to the meshing end of the movable tooth 1 than the first side wall.

[0058] In the prior art, the movable tooth 1 may be stuck in the return phase of engagement with the inner tooth ring 3, because the groove cam 8 exerts a pushing force on the movable tooth 1 in the pushing phase. The meshing-in phase of the movable tooth 1 is strictly implemented according to the design scheme, but the movable tooth 1 does not have a special force in the return phase, so the movable tooth 1 may be stuck. Therefore, the groove 9 structure is provided, so that the movable tooth 1 not only receives a pushing force in the pushing phase, but also receives a pulling force in the return phase, thereby avoiding the sticking problem in the original design return phase and improving the accuracy of transmission.

[0059] Wherein, the movable tooth 1 comprises a first end engaged with the inner ring gear 3, and a second end arranged away from the first end, and the movable tooth 1 is connected with the roller bearing 10 which is rollably accommodated in the groove 9. The roller bearing 10 is sleeved and connected with a rod-shaped fixing member which is fixedly connected with the inner wall of the roller bearing 10. In this way, the flexibility of the device is improved, and the friction is reduced.

[0060] As shown in Figure 2 , the meshing section of the movable tooth 1 and the inner ring gear 3 is described in detail. The roller bearing 10 connected with the movable tooth 1 is in the leftmost position, i.e. the trough position, in the groove 9. With the rotation of the groove cam 8, the logarithmic spiral groove 9 in the groove cam 8 moves from the trough position to the peak position at the contact position with the roller bearing 10. The rollers on the roller bearing 10 are pushed by the left side of the raceway and have a tendency to move in the right side axial direction. However, due to the meshing of the tooth surface of the movable tooth 1 and the tooth surface of the inner ring gear 3, the movable tooth 1 can only move along the tooth surface direction of the inner ring gear 3. This movement has a circumferential direction component which is opposite to the direction of the groove cam 8. Since the tooth side of the movable tooth 1 is in the hole of the retainer 2, the circumferential direction movement of the movable tooth 1 drives the retainer 2 to move, thereby achieving deceleration.

[0061] In addition, the side gap adjustable end face logarithmic spiral movable tooth transmission device further comprises a gap adjusting assembly for adjusting the gap between the inner ring gear 3 and the movable tooth 1. The machining error, assembly error and wear problem after long time operation of the parts such as the movable tooth 1 and the inner ring gear 3 in the production process will affect the theoretical zero side gap transmission, produce meshing tooth impact vibration and affect the transmission accuracy. The setting of the gap adjusting assembly can avoid the above problems.

[0062] Wherein, the outer peripheral wall of the inner ring gear 3 is provided with a first external thread; the gap adjusting assembly comprises a mounting bracket 11 for fixing the inner ring gear 3 in the circumferential direction, and a second external thread is arranged on the outer peripheral wall of the mounting bracket 11; a screw member 12 comprises a first part screwed with the inner ring gear 3, and a second part screwed with the mounting bracket 11, and the first part and the second part are connected; wherein, the pitches of the first external thread and the second external thread are different. As shown in Figure 3 , the first part is located on the left side of the second part. In the initial state, the internal thread of the first part is engaged with the leftmost side of the first external thread of the inner ring gear 3, and the internal thread of the second part is engaged with the leftmost side of the second external thread of the mounting bracket 11. When the screw member 12 is rotated and moves to the right side, i.e. moves to the right relative to the inner ring gear 3 and the mounting bracket 11, due to the difference in the pitches of the first external thread and the second external thread, the inner ring gear 3 moves to the left relative to the mounting bracket 11, so as to compensate for the tooth side gap caused by wear or machining, thereby improving the accuracy of the transmission.

[0063] It should be noted that the specific pitches of the first external thread and the second external thread are set according to requirements.

[0064] In a certain example, the pitch of the first external thread is 1.45 mm, and the pitch of the second external thread is 1.5 mm. Since there is a pitch difference between the inner thread pitch of the first part of the screw piece 12, which is 1.45 mm, and the inner thread pitch of the second part, which is 1.5 mm, when the screw piece 12 is rotated to move it to the right, i.e., to move it to the right relative to the inner ring 3 and the mounting frame 11, the inner ring 3 moves to the left relative to the mounting frame 11 by 0.05 mm due to the different pitches of the first external thread and the second external thread. When there is a tooth side gap between the movable tooth 1 and the inner ring 3 of the end face logarithmic spiral tooth transmission device due to machining, installation or wear, the tooth side gap can be reduced by rotating the screw piece 12, and after adjustment, the locking nut 13 arranged on the right side of the screw piece 12 can be used for locking. The second housing 15 is designed in a detachable form to facilitate the adjustment of the gap.

[0065] More specifically, the inner ring 3 and the mounting frame 11 are connected by spline connection. This connection mode limits the rotation of the inner ring 3 in the circumferential direction of the mounting frame 11, but allows it to move in the axial direction.

[0066] This connection mode is simple and reliable.

[0067] In an optional embodiment, the line located in the groove 9 and equidistant from the first side wall and the second side wall is a theoretical profile line, the theoretical profile line is a logarithmic spiral line, and the groove 9 is formed by sweeping the theoretical profile line in the axial direction. The first end face of the movable tooth 1 and the second end face of the inner ring 3 are both meshing surfaces formed based on a logarithmic spiral line, and the first end face and the second end face are in meshing transmission. It should be noted that the parameters of the logarithmic spiral line forming the groove 9 are matched with the parameters of the logarithmic spiral line forming the first end face and the second end face. The specific parameters include the wave number of the groove cam 8, the number of teeth of the inner ring 3, the spiral angle of the logarithmic spiral line, the base circle radius, and the reference radius. Preferably, the high-order polynomial modification method can be used to make the curves at the peaks and valleys of the profile line of the groove 9 continuously smooth, and the speed and acceleration do not change suddenly.

[0068] The basic principles of the present application are described above in conjunction with specific embodiments, but it should be noted that the advantages, advantages, effects, etc. mentioned in the present application are only examples and not limitations, and these advantages, advantages, effects, etc. cannot be considered as the must-have of each embodiment of the present application. In addition, the above specific details are only for the purpose of example and understanding, and not for limitation, and the above details do not limit the present application to the above specific details.

[0069] The block diagrams of the devices, apparatuses, equipment, systems referred to in this application are only illustrative examples and are not intended to require or imply that the connection, arrangement, configuration must be as shown in the block diagrams. These devices, apparatuses, equipment, systems can be connected, arranged, configured in any way as will be appreciated by those skilled in the art. Words such as "include", "contain", "have", and the like are open-ended words, mean "including but not limited to", and can be used interchangeably with each other. The words "or" and "and" used herein mean the word "and / or", and can be used interchangeably with each other, unless the context clearly indicates otherwise. The word "such as" used herein means the phrase "such as but not limited to", and can be used interchangeably with each other.

[0070] It should also be noted that in the devices, apparatuses and boxes of the present application, each component or each step can be disassembled and / or reassembled. These disassembly and / or reassembly should be considered as equivalent solutions of the present application.

[0071] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0072] It should be understood that the adjectives "first", "second", "third", "fourth", "fifth" and "sixth" used in the embodiments of the present application are only used for a clearer description of the technical solutions and cannot be used to limit the protection scope of the present application.

[0073] The above description has been given for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A side gap adjustable face-tooth logarithmic spiral motion transmission device, characterized in that, The transmission assembly comprises a movable tooth, a retainer rotating synchronously with the movable tooth, and an inner gear ring meshing with the movable tooth, the retainer is provided with a lubricating hole and a fixing hole allowing the movable tooth to pass through, and the lubricating hole is located at the outer periphery of the fixing hole. The housing allows the movable tooth to pass through. The lubricating assembly comprises an elastic telescopic member and an abutting assembly, the elastic telescopic member is arranged in the lubricating hole and can abut against the hole wall of the lubricating hole, one end of the abutting assembly is connected with the end of the elastic telescopic member, and the other end of the abutting assembly abuts against the housing, and the surface of the housing abutting against the other end is an inclined surface. The region where the movable tooth rotates circumferentially comprises a top region and a bottom region, when the movable tooth drives the lubricating assembly to rotate in the bottom region, the lubricating assembly restores deformation and elongates to push the abutting assembly to approach the inclined surface, so that the length of the abutting assembly in the lubricating hole is reduced to release space for the lubricating oil to enter the lubricating hole, and when the movable tooth drives the lubricating assembly to rotate in the top region, the lubricating assembly is compressed by the inclined surface, so that the elastic telescopic member is shortened, the abutting assembly moves into the lubricating hole, and the length of the abutting assembly in the lubricating hole is increased to squeeze the lubricating oil in the lubricating hole and make it discharge to the meshing tooth surface of the inner gear ring. The abutting assembly comprises:

2. The side gap adjustable face-to-face logarithmic spiral oscillating tooth gear transmission device according to claim 1, characterized in that, an abutting part in surface contact with the inclined surface; a connecting part hingedly connected with the abutting part at one end and fixedly connected with the elastic telescopic member at the other end. The transmission assembly further comprises a groove cam, and the outer peripheral wall of the groove cam is provided with a groove.

3. The side gap adjustable face-to-face logarithmic spiral oscillating tooth gear transmission device according to claim 1, characterized in that, When the movable tooth rotates in a first direction, the first side wall of the groove pushes the movable tooth, and when the movable tooth rotates in a second direction, the second side wall of the groove pulls the movable tooth, the first direction is opposite to the second direction, and the first side wall and the second side wall are oppositely arranged. The movable tooth comprises a first end meshing with the inner gear ring and a second end arranged away from the first end, the movable tooth is connected with a roller bearing close to the second end, and the roller bearing is rollably accommodated in the groove.

4. The side gap adjustable face-to-face logarithmic spiral oscillating tooth gear transmission device according to claim 3, characterized in that, Further comprising a clearance adjusting assembly for adjusting the gap between the inner gear ring and the movable tooth.

5. The adjustable back lash face-toothed spiral drive of claim 1, wherein, The outer peripheral wall of the inner gear ring is provided with a first external thread.

6. The adjustable-backlash face-toothed star transmission according to claim 5, characterized in that The clearance adjusting assembly comprises: a mounting rack for fixing the inner gear ring in the circumferential direction, and a second external thread is arranged on the outer peripheral wall of the mounting rack; a screwing member comprising a first part screwing with the inner gear ring and a second part screwing with the mounting rack, and the first part and the second part are connected; wherein the pitches of the first external thread and the second external thread are different. The pitch of the first external thread is 1.45 mm, and the pitch of the second external thread is 1.5 mm.

7. The adjustable-backlash face-toothed star transmission according to claim 6, characterized in that The inner gear ring and the mounting rack are connected by splines.

8. The adjustable back lash face-toothed spiral drive as set forth in claim 6, wherein ​ 9. The adjustable back lash face-toothed spiral drive as set forth in claim 4, wherein The line located in the groove and equidistant from the first side wall and the second side wall is a theoretical profile line, the theoretical profile line is a logarithmic spiral line, and the groove is formed by axially sweeping the theoretical profile line, the first end surface of the movable tooth and the second end surface of the inner tooth ring are both meshing surfaces based on a logarithmic spiral line, and the first end surface and the second end surface are in meshing transmission.

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