CN212744911U

CN212744911U - Transmission and lifting mechanism

Info

Publication number: CN212744911U
Application number: CN202021176116.8U
Authority: CN
Inventors: 刘义民
Original assignee: Xi'an Leitong Science & Technology Co ltd
Current assignee: Xi'an Leitong Science & Technology Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-03-19
Anticipated expiration: 2030-06-22

Abstract

The disclosure provides a transmission device and a lifting mechanism, and relates to the technical field of mechanical transmission. This transmission includes axis of rotation, locating part, regulating part and elastic component, wherein: the surface of the rotating shaft is provided with a thread; the limiting piece is sleeved on the periphery of the rotating shaft and is connected with the rotating shaft through threads; the adjusting piece is in threaded connection with the periphery of the rotating shaft and can move to one side close to the limiting piece by rotating the adjusting piece; and the elastic assembly is connected between the limiting part and the adjusting part and is used for applying elastic force to the limiting part and the adjusting part when the adjusting part moves to one side close to the limiting part. The transmission device and the lifting mechanism can improve transmission precision.

Description

Transmission and lifting mechanism

Technical Field

The disclosure relates to the technical field of mechanical transmission, in particular to a transmission device and a lifting mechanism.

Background

The transmission device is a device for converting a rotational motion into a linear motion, and is widely applied to a lifting mechanism to realize the reciprocating motion of the lifting mechanism along with the development of manufacturing technology. The transmission device mainly realizes transmission through the matching of the transmission shaft and the adjusting piece, however, the axial clearance between the transmission shaft and the adjusting piece of the existing transmission device is larger, and the transmission precision is lower.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

The present disclosure aims to overcome the above-mentioned deficiencies in the prior art, and provides a transmission device and a lifting mechanism, which can improve the transmission precision.

According to one aspect of the present disclosure, there is provided a transmission comprising:

the surface of the rotating shaft is provided with a thread;

the limiting piece is sleeved on the periphery of the rotating shaft and is connected with the rotating shaft through threads;

the adjusting piece is in threaded connection with the periphery of the rotating shaft, and can move to one side close to the limiting piece by rotating the adjusting piece;

and the elastic assembly is connected between the limiting part and the adjusting part and used for applying acting force to the limiting part and the adjusting part when the adjusting part moves to one side close to the limiting part.

In an exemplary embodiment of the present disclosure, the adjusting member has at least one first fixing hole, and the first fixing hole penetrates in an axial direction of the adjusting member;

the limiting piece is provided with at least one second fixing hole, and the second fixing hole extends along the axial direction of the limiting piece;

the elastic component comprises a fixing pin, and the fixing pin penetrates through the first fixing hole and the second fixing hole, so that the limiting part and the axial distance between the internal thread of the adjusting part and the external thread of the rotating shaft are reduced.

In an exemplary embodiment of the disclosure, the elastic component is a spring, and the spring is clamped between the adjusting member and the limiting member and can apply an elastic force to the limiting member and the adjusting member when the adjusting member moves to a side close to the limiting member.

In an exemplary embodiment of the present disclosure, the first fixing holes are plural, and each of the first fixing holes is uniformly distributed along a circumferential direction of the adjusting member; the second fixing holes are uniformly distributed along the circumferential direction of the limiting piece, and the second fixing holes are arranged in one-to-one correspondence with the first fixing holes.

In an exemplary embodiment of the disclosure, the number of the fixing pins is multiple, and each of the fixing pins is correspondingly inserted into each of the first fixing holes and each of the second fixing holes.

In an exemplary embodiment of the present disclosure, the spring is annularly sleeved on an outer circumference of the rotating shaft.

In an exemplary embodiment of the present disclosure, the transmission further includes:

the sleeve is sleeved outside the rotating shaft, one end of the sleeve is fixedly connected with the limiting part, the other end of the sleeve is detachably connected with the adjusting part, and the spring is located between the sleeve and the rotating shaft.

In an exemplary embodiment of the disclosure, a first boss extending outward in a radial direction is disposed on an outer circumference of one end of the adjusting member close to the sleeve, and the sleeve is clamped between the first boss and the limiting member.

In an exemplary embodiment of the disclosure, the sleeve has a second boss extending inward in a radial direction of the sleeve, the stopper extends deep into the sleeve and abuts against the second boss, and the transmission device further includes:

and the positioning pin penetrates through the sleeve and the limiting part and is in threaded connection with the sleeve and the limiting part.

According to an aspect of the present disclosure, there is provided a lifting mechanism comprising the transmission device of any one of the above.

According to the transmission device and the lifting mechanism, the adjusting piece can be rotated to one side close to the limiting piece in the process of rotating the adjusting piece, so that the distance between the limiting piece and the adjusting piece is reduced, acting force is applied to the limiting piece and the adjusting piece through the elastic component between the limiting piece and the adjusting piece respectively, the side wall of the thread inside the limiting piece is contacted with the side wall of the thread outside the rotating shaft, and therefore the gap between the internal thread of the limiting piece and the external thread of the rotating shaft in the axial direction is reduced; simultaneously, make the lateral wall of the inside screw thread of adjusting part and the outside screw thread of axis of rotation lateral wall contact to reduce the internal thread of adjusting part and the external screw thread of axis of rotation clearance in the axial, avoid the axis of rotation to scurry in the axial at the rotation in-process, improve transmission accuracy.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

FIG. 1 is a schematic illustration of a transmission according to a first embodiment of the present disclosure.

FIG. 2 is a schematic view of a transmission according to a second embodiment of the present disclosure.

Fig. 3 is an enlarged schematic view of the area a in fig. 2.

In the figure: 1. a rotating shaft; 2. a limiting member; 21. a flange; 3. an adjustment member; 31. a first fixing hole; 32. a first boss; 4. a fixing pin; 5. a spring; 6. a sleeve; 61. a second boss; 7. and a positioning pin.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.

Although relative terms, such as "upper" and "lower," may be used in this specification to describe one element of an icon relative to another, these terms are used in this specification for convenience only, e.g., in accordance with the orientation of the examples described in the figures. It will be appreciated that if the device of the icon were turned upside down, the element described as "upper" would become the element "lower". When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.

The terms "a," "an," "the," and "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. The terms "first" and "second" are used merely as labels, and are not limiting on the number of their objects.

The disclosed embodiments provide a transmission device, as shown in fig. 1 and 2, the transmission device may include a rotation shaft 1, a limiting member 2, an adjusting member 3, and an elastic component, wherein:

the surface of the rotating shaft 1 can be provided with threads;

the limiting piece 2 can be sleeved on the periphery of the rotating shaft 1 and can be connected with the rotating shaft 1 through threads;

the adjusting piece 3 can be in threaded connection with the periphery of the rotating shaft 1, and the adjusting piece 3 can move to one side close to the limiting piece 2 by rotating the adjusting piece 3;

the elastic component may be connected between the limiting member 2 and the adjusting member 3, and may be configured to apply an acting force to the limiting member 2 and the adjusting member 3 when the adjusting member 3 moves to a side close to the limiting member 2.

According to the transmission device, the adjusting piece 3 can be rotated to one side close to the limiting piece 2 in the process of rotating the adjusting piece 3, so that the distance between the limiting piece 2 and the adjusting piece 3 is reduced, acting force is respectively applied to the limiting piece 2 and the adjusting piece 3 through the elastic assembly between the limiting piece 2 and the adjusting piece 3, the side wall of the thread inside the limiting piece 2 is contacted with the side wall of the thread outside the rotating shaft 1, and therefore the axial gap between the internal thread of the limiting piece 2 and the external thread of the rotating shaft 1 is reduced; simultaneously, make the lateral wall of the inside screw thread of adjusting part 3 and the outside screw thread of axis of rotation 1 contact to reduce the internal thread of adjusting part 3 and the external screw thread of axis of rotation 1 at ascending clearance in the axial, avoid axis of rotation 1 scurring in the axial at the rotation in-process, improve the transmission precision.

The following provides a detailed description of the various portions of the transmission of the embodiments of the present disclosure:

the rotating shaft 1 may have a rod shape, a cross section of which may be circular or elliptical, and a material of which may be metal, alloy, stainless steel, or the like, and the cross section shape and the material of the rotating shaft 1 are not particularly limited. The surface of the rotating shaft 1 may be provided with threads, for example, the rotating shaft 1 may be a lead screw or a screw rod.

The limiting member 2 can be sleeved on the periphery of the rotating shaft 1, can be connected with the rotating shaft 1 through threads, and can move along the axial direction of the rotating shaft 1 in the rotating process of the rotating shaft 1. The limiting member 2 may be a ring-shaped structure, and the cross section of the inner circumferential surface thereof may be a circle or an ellipse, which is not limited herein. The position-limiting member 2 may be made of a rigid material, for example, a metal, an alloy or stainless steel, and is not particularly limited.

The inner circumferential surface of the limiting member 2 may be provided with a screw thread, and the screw thread may be engaged with the screw thread on the surface of the rotating shaft 1, so that the limiting member 2 can move along the axial direction of the rotating shaft 1 during the rotation of the rotating shaft 1. For example, the limiting member 2 may be a nut or a nut, or may be other members, and is not particularly limited herein.

In an embodiment of the present disclosure, one end of the limiting member 2 may be provided with a flange 21 extending outward in a radial direction, the flange 21 may be a flange structure so as to be fixedly connected with an external structure, the flange 21 may be an integral structure with the limiting member 2, and of course, the flange 21 may also be fixedly connected with the limiting member 2 by welding, bolting, or other methods, which is not limited herein.

In one embodiment of the present disclosure, the position-limiting member 2 may have at least one second fixing hole, which may be a straight hole with the same diameter at each position, and the second fixing hole may be a circular hole, which may have threads inside. For example, it may be a screw hole. The second fixing hole may extend in the axial direction of the limiting member 2. For example, the through hole may be a through hole with two ends penetrating, or may be a blind hole, which is not limited herein. The second fixing holes may be plural, and the plural second fixing holes may be uniformly distributed along the circumferential direction of the limiting member 2. For example, the number of the second fixing holes may be 2, 3, 4, 5 or 6, and of course, other numbers may be used, which are not listed here.

The adjusting member 3 may be sleeved on the periphery of the rotating shaft 1 and may be located at one side of the limiting member 2. The adjusting member 3 may have a ring-shaped configuration, and the cross-section of the inner circumferential surface thereof may be circular or elliptical, which is not particularly limited herein. The adjusting member 3 may be made of a rigid material, for example, a metal, an alloy or stainless steel, and is not particularly limited.

The adjusting member 3 may be threadedly coupled to an outer circumferential surface of the rotating shaft 1, and specifically, the inner circumferential surface of the adjusting member 3 may be provided with a screw thread that is engaged with a screw thread on a surface of the rotating shaft 1, so that the adjusting member 3 can be moved to a side close to the limiting member 2 by rotating the adjusting member 3. For example, the limiting member 2 may be a nut or a nut, or may be other members, and is not particularly limited herein.

In one embodiment of the present disclosure, the adjusting member 3 may have at least one first fixing hole 31, and the first fixing hole 31 may be a circular hole, and may have threads formed therein. The first fixing hole 31 may penetrate in the axial direction of the adjuster 3. For example, it may be a through hole.

In an embodiment, the first fixing hole 31 may include a plurality of hole segments abutting against each other, and a thread may be provided at least inside the hole segment closest to the limiting member 2, or of course, a thread may be provided in each hole segment, which is not particularly limited herein. In two adjacent hole segments, the hole diameter of the hole segment close to the side of the limiting member 2 may be smaller than the hole diameter of the hole segment far from the side of the limiting member 2.

For example, the first fixing hole 31 may include a first hole section and a second hole section that are butted with each other, the first hole section is located on a side of the second hole section away from the limiting member 2, an aperture of the first hole section is larger than an aperture of the second hole section, and a thread structure is disposed inside the second hole section. For example, the first fixing hole 31 may be a stepped hole, and the first fixing hole 31 may be a straight hole having both ends penetrating therethrough, which is not particularly limited herein.

The first fixing holes 31 may be plural, and the plural first fixing holes 31 may be uniformly distributed along the circumferential direction of the adjusting member 3. For example, the number of the first fixing holes 31 may be 2, 3, 4, 5 or 6, or other numbers, which are not listed here.

It should be noted that the first fixing holes 31 may be disposed corresponding to the second fixing holes one by one, and the first fixing holes 31 may have the same shape and the same number as the second fixing holes, and the aperture of the first fixing holes 31 near the limiting member 2 may be equal to the aperture of the second fixing holes, so as to connect the limiting member 2 and the adjusting member 3 together through the first fixing holes 31 and the second fixing holes.

The elastic assembly can be connected between the limiting member 2 and the adjusting member 3, and can be used for applying acting force to the limiting member 2 and the adjusting member 3 when the adjusting member 3 moves to one side close to the limiting member 2, so that the side wall of the thread inside the limiting member 2 is contacted with the side wall of the thread outside the rotating shaft 1, and the gap between the internal thread of the limiting member 2 and the external thread of the rotating shaft 1 in the axial direction is reduced; simultaneously, make the lateral wall of the inside screw thread of adjusting part 3 and the outside screw thread of axis of rotation 1 contact to reduce the internal thread of adjusting part 3 and the external screw thread of axis of rotation 1 at ascending clearance in the axial, avoid axis of rotation 1 scurring in the axial at the rotation in-process, improve the transmission precision.

In a first embodiment of the present disclosure, as shown in fig. 1, the elastic assembly may include a fixing pin 4, the fixing pin 4 may be disposed through the first fixing hole 31 and the second fixing hole and may be in threaded connection with the first fixing hole 31 and the second fixing hole, the fixing pin 4 may be pushed up by adjusting a depth at which the fixing pin 4 is connected with the second fixing hole, and when the fixing pin 4 is pushed up, the fixing pin 4 may respectively generate a pulling force on the limiting member 2 and the adjusting member 3, so that the adjusting member 3 moves to a side close to the limiting member 2, thereby reducing an axial distance between an internal thread of the adjusting member 3 and an external thread of the rotating shaft 1; make locating part 2 to the one side removal that is close to regulating part 3 simultaneously to make locating part 2 to the one side removal that is close to locating part 2, and then make the internal thread of locating part 2 and the axial interval of the external screw thread of axis of rotation 1 reduce, avoid axis of rotation 1 to scurry in the axial at the rotation in-process, improve the transmission precision.

The fixing pin 4 may be in a strip shape, and may include a fixing rod and an extension portion located at one end of the fixing rod, the extension portion may be in an integral structure with the fixing portion, and the material of the extension portion may be metal, alloy or other materials, as long as the material is a hard structure.

The fixing rod may be provided with a thread, and an end portion of the fixing rod, which is far away from the extending portion, may be inserted into the first fixing hole 31 and the second fixing hole from an opening of one end of the first fixing hole 31, which is far away from the limiting member 2, and may be fixed with the first fixing hole 31 and the second fixing hole through the thread. When the first fixing hole 31 and the second fixing hole are both straight holes, the extending portion can cover a side of the first fixing hole 31 away from the limiting member 2, so as to prevent the fixing pin 4 from penetrating through the first fixing hole 31, and the limiting member 2 and the adjusting member 3 cannot be fixedly connected. When the first fixing hole 31 is a stepped hole, because the hole diameter of the hole section near one side of the limiting member 2 is smaller than the hole diameter of the hole section far from one side of the limiting member 2 in two adjacent hole sections of the stepped hole, the extending portion can be hung at the end part of the hole section nearest one side of the limiting member 2 far from the limiting member 2, so that the fixing pin 4 is prevented from penetrating out of the first fixing hole 31, and the limiting member 2 and the adjusting member 3 cannot be fixedly connected.

For example, the fixing pin 4 may be a screw or a bolt, or may be other components, which are not limited herein.

The number of the fixing pins 4 may be plural, for example, it may be 2, 3, 4, 5 or 6, or, of course, it may be other numbers, which are not listed here. The number of the fixing pins 4 may be equal to the number of the first fixing holes 31 and the second fixing holes, and the fixing pins may be correspondingly inserted into the first fixing holes 31 and the second fixing holes.

It should be noted that the fixing pin 4 should not be too tight to avoid reducing the transmission efficiency, the fixing pin 4 is inserted into the first fixing hole 31 and the second fixing hole, and the damping force between the rotating shaft 1 and the limiting member 2 and between the rotating member 3 can be detected in real time in the process of rotating and jacking the fixing pin 4, when the damping force is a preset value, the rotating fixing pin 4 can be stopped, at this moment, it can be considered that the internal thread of the limiting member 2 and the axial gap between the internal thread of the adjusting member 3 and the external thread of the rotating shaft 1 are eliminated, and the transmission efficiency can be ensured. The preset value may be set according to specific materials of the rotating shaft 1, the limiting member 2 and the adjusting member 3, and is not particularly limited herein.

In addition, in order to reduce the friction force in the rotating process, lubricating grease can be coated on the threads on the surface of the rotating shaft 1 in the rotating process, so that the internal threads of the adjusting part 3 and the limiting part 2 and the external threads of the rotating shaft 1 are fully lubricated, the mechanical friction force is reduced, and the mechanical efficiency of transmission is ensured.

In a second embodiment of the present disclosure, as shown in fig. 2, the elastic component may be a spring 5, the spring 5 may be clamped between the adjusting part 3 and the limiting part 2, and the spring 5 may be compressed when the adjusting part 3 moves to a side close to the limiting part 2 to generate an elastic force, and the elastic force may act on the limiting part 2, so that the limiting part 2 moves slightly to a side away from the adjusting part 3, and further a sidewall of an internal thread of an inner circumferential surface of the limiting part 2 contacts a sidewall of an external thread of the rotating shaft 1, thereby reducing an axial distance between the limiting part 2 and the rotating shaft 1, and improving a transmission precision of the limiting part 2. Meanwhile, the elastic force can also act on the adjusting piece 3, so that the adjusting piece 3 slightly moves towards one side far away from the limiting piece 2, and then the side wall of the internal thread on the inner circumferential surface of the adjusting piece 3 is contacted with the side wall of the thread on the outer circumference of the rotating shaft 1, thereby reducing the axial distance between the adjusting piece 3 and the rotating shaft 1 and improving the transmission precision of the adjusting piece 3.

In one embodiment, the spring 5 may be annularly sleeved on the outer circumference of the rotating shaft 1, and may be a circular ring, a square ring or other rings, which is not limited herein. The spring 5 can be located between the adjusting part 3 and the limiting part 2, when the adjusting part 3 moves to one side close to the limiting part 2, the spring 5 can be in contact with the adjusting part 3 and can move to one side close to the limiting part 2 along with the adjusting part 3, and when the distance between the adjusting part 3 and the limiting part 2 is smaller than the length of the spring 5, the spring 5 can be compressed to generate elastic force. For example, two ends of the spring 5 may be respectively connected to the limiting member 2 and the adjusting member 3 in a contact manner, or two ends of the spring 5 may be respectively connected to the limiting member 2 and the adjusting member 3 in a clamping manner, a welding manner, or an adhesion manner, and no particular limitation is imposed herein.

The transmission device according to the embodiment of the present disclosure may further include a sleeve 6, where the sleeve 6 may be sleeved outside the rotating shaft 1 and may be wrapped around the outer circumference of the spring 5, that is, the spring 5 may be located between the sleeve 6 and the rotating shaft 1. After the axial clearance between the limiting part 2 and the adjusting part 3 and the rotating shaft 1 is eliminated under the action of the elastic force of the spring 5, one end of the sleeve 6 can be fixedly connected with the limiting part 2, and the other end of the sleeve can be detachably connected with the adjusting part 3, so that the limiting part 2 and the adjusting part 3 are fixed.

The sleeve 6 may have a cylindrical structure with two ends penetrating, and the cross section of the inner circumferential surface may be circular or rectangular, which is not particularly limited herein. In one embodiment, the inner circumferential surface of the sleeve 6 near one end of the adjuster 3 may have the same shape as the outer circumferential surface of the adjuster 3, and the sleeve 6 may be fitted over the outer circumference of the adjuster 3; the shape of the inner circumferential surface of the end close to the stopper 2 may be the same as the shape of the outer circumferential surface of the stopper 2, and the sleeve 6 may be attached to the outer circumference of the stopper 2. The material of the sleeve 6 may be a metal or an alloy, and is not particularly limited as long as it is a material having high rigidity.

In one embodiment, the sleeve 6 can be detachably connected to the adjusting member 3, so that the sleeve 6 can be detached for maintenance when the transmission accuracy of the transmission device is reduced or the transmission damping force is large. Specifically, the adjusting member 3 may have a first boss 32 on an outer periphery of an end thereof near the sleeve 6, the first boss 32 may extend radially outward, the sleeve 6 may be clamped between the first boss 32 and the limiting member 2, and the sleeve 6 may be bonded to the first boss 32 by bonding, so as to prevent the sleeve 6 from loosening from the first boss 32 during use. The first boss 32 may be a circular truncated cone or a truncated pyramid, and may be integrated with the adjusting member 3.

As shown in fig. 3, the sleeve 6 may have a second boss 61, the second boss 61 may be located in a middle portion of the sleeve 6 and may extend inward along a radial direction of the sleeve 6, and an end portion of the limiting member 2 away from the flange 21 may extend into the sleeve 6 and may abut against the second boss 61, for example, the second boss 61 may be a circular truncated cone or a truncated pyramid, and may be integrated with the sleeve 6.

The transmission device according to the embodiment of the present disclosure may further include a positioning pin 7, and the sleeve 6 may be provided with a first positioning hole, and the first positioning hole may be provided in a portion where the sleeve 6 overlaps the limiting member 2. The limiting member 2 may have a second positioning hole, and when the limiting member 2 extends into the sleeve 6, the first positioning hole and the second positioning hole are opposite to each other. The positioning pin 7 can sequentially penetrate through the first positioning hole and the second positioning hole to be connected with the sleeve 6 and the limiting part 2, so that the sleeve 6 is fixed with the limiting part 2, the adjusting part 3, the limiting part 2, the spring 5 and the sleeve 6 are connected together, a structure formed by the adjusting part 3, the limiting part 2, the spring 5 and the sleeve 6 can be regarded as a whole, and the whole can be used as an anti-backlash screw.

The number of the first positioning holes can be multiple, and the multiple first positioning holes can be uniformly distributed along the circumferential direction of the sleeve 6; for example, there may be 2, 3, 4 or 5, and of course, there may be other numbers, which are not listed here. The number of the second positioning holes can be multiple, the second positioning holes can be uniformly distributed along the circumferential direction of the limiting part 2, the number of the second positioning holes can be equal to that of the first positioning holes, and each second positioning hole can be arranged in one-to-one correspondence with each first positioning hole; the positioning pins 7 can also be multiple, and the positioning pins 7 can correspondingly penetrate through the first positioning holes and the second positioning holes one by one.

The positioning pin 7 may be strip-shaped, may have threads thereon, and may be connected to the sleeve 6 and the limiting member 2 through threads, and may be made of metal, alloy or other materials as long as it is a hard structure. The positioning pin 7 may be a bolt, for example, but may be other members.

Embodiments of the present disclosure also provide a lifting mechanism, which may include the transmission device of any of the above embodiments. The structure and the beneficial effects of the lifting mechanism can be referred to the transmission device in the above embodiment, and will not be described in detail here. For example, the lifting mechanism may be a lifting table, a lifting column, or the like.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A transmission, comprising:

the surface of the rotating shaft is provided with a thread;

2. The transmission device according to claim 1, wherein the adjusting member has at least a first fixing hole, the first fixing hole passing through in an axial direction of the adjusting member;

3. The transmission according to claim 1, wherein the elastic member is a spring, and the spring is clamped between the adjusting member and the limiting member and can apply an elastic force to the limiting member and the adjusting member when the adjusting member moves to a side close to the limiting member.

4. The transmission device according to claim 2, wherein the first fixing holes are plural, and each of the first fixing holes is uniformly distributed along a circumferential direction of the adjusting member; the second fixing holes are uniformly distributed along the circumferential direction of the limiting piece, and the second fixing holes are arranged in one-to-one correspondence with the first fixing holes.

5. The transmission according to claim 4, wherein the number of the fixing pins is plural, and each of the fixing pins is correspondingly inserted into the first fixing hole and the second fixing hole.

6. The transmission device as claimed in claim 3, wherein the spring is annularly sleeved on the outer periphery of the rotating shaft.

7. The transmission of claim 3, further comprising:

8. The transmission device according to claim 7, wherein a first boss extending radially outward is provided on an outer periphery of one end of the adjusting member near the sleeve, and the sleeve is engaged between the first boss and the limiting member.

9. The transmission of claim 8, wherein the sleeve has a second boss extending inward in a radial direction of the sleeve, the stop extends into the sleeve and abuts against the second boss, and the transmission further comprises:

10. A lifting mechanism comprising a transmission as claimed in any one of claims 1 to 9.