CN114321327A - Axial displacement adjusting device - Google Patents

Abstract

The invention belongs to the technical field of mechanical transmission, and discloses an axial displacement adjusting device which comprises a driving shaft, a driven member and a displacement adjusting assembly. The driven part is connected to the driving shaft and can rotate around the axis of the driving shaft synchronously, and the displacement adjusting assembly is used for adjusting the axial displacement of the driven part on the driving shaft. The displacement adjusting assembly comprises a rotating piece and a displacement adjusting piece, the displacement adjusting piece is sleeved outside the driving shaft at intervals and is coaxial with the driving shaft, the rotating piece is in threaded connection with the displacement adjusting piece, and the rotating piece is rotated to enable the displacement adjusting piece to move along the axial direction of the driving shaft. That is, the displacement regulating member can convert the rotational motion of the rotation member into the linear motion of the displacement regulating member. The displacement adjusting piece is connected with the driven piece, and then the driven piece is driven to move along the axial direction of the driving shaft. The axial displacement adjusting device provided by the invention has the advantages of high adjusting precision, large displacement adjustable range, simple structure and low manufacturing cost.

Description

Axial displacement adjusting device

Technical Field

The invention relates to the technical field of mechanical transmission, in particular to an axial displacement adjusting device.

Background

In mechanical transmission mechanisms, it is sometimes necessary to adjust the axial displacement of parts rotating around an axis, for example, common fork mechanisms are often used in manual operation or clutch application.

In the prior art, the mechanisms for adjusting the axial displacement of the parts are generally two types, one type is based on a lead screw and nut mechanism, and the rotary motion of a driving part is converted into the axial motion of the driven parts, but the method can only be used for small parts and cannot realize the displacement adjustment of large parts; the other method is based on a cam structure, the connecting rod assembly is arranged in the circumferential direction of the cam, and when the cam rotates, the output end of the connecting rod assembly is driven to do linear motion.

Disclosure of Invention

The invention aims to provide an axial displacement adjusting device which is wide in application range, high in adjusting precision, large in displacement adjustable range, simple in structure and low in manufacturing cost.

In order to achieve the purpose, the invention adopts the following technical scheme:

an axial displacement adjustment device comprising:

a drive shaft;

a driven member connected to the drive shaft and capable of rotating around an axis thereof in synchronization with the drive shaft;

the displacement adjustment assembly, the displacement adjustment assembly is including rotating piece and displacement adjustment spare, displacement adjustment spare spacer sleeve is located outside the driving shaft, and with the driving shaft is coaxial, rotate the piece with displacement adjustment spare threaded connection, the displacement adjustment spare with the follower links to each other, rotates the piece can make the displacement adjustment spare drives the follower is followed the axial displacement of driving shaft.

Optionally, the displacement adjusting assembly further comprises a shell and a limiting shaft, the shell is covered on the rotating piece and is located outside the displacement adjusting piece, the limiting shaft penetrates through the displacement adjusting piece and is parallel to the driving shaft, and the limiting shaft is connected with the shell.

Optionally, the rotating part is sleeved outside the displacement adjusting part at intervals, and is coaxial with the displacement adjusting part, an internal thread is arranged on the inner wall of the rotating part in the circumferential direction, and an external thread capable of being matched with the internal thread is arranged on the periphery of the displacement adjusting part.

Optionally, the displacement adjustment assembly further comprises a driving member, a fixed end of the driving member is connected to the housing, an output end of the driving member is connected to the rotating member, and the output end of the driving member can drive the rotating member to rotate around the axis of the driving shaft.

Optionally, a positioning structure is disposed on the housing, and the positioning structure is configured to fix a position between the rotating member and the housing.

Optionally, the displacement adjusting assembly further comprises a shaft sleeve and a bearing set, the shaft sleeve is sleeved outside the driving shaft and connected with the driven member, and the bearing set is connected with the displacement adjusting member and the shaft sleeve.

Optionally, the displacement adjusting assembly further comprises a positioning ring, a first limiting step is arranged on the displacement adjusting member, one end of the bearing set abuts against the first limiting step, and the other end of the bearing set is fixedly connected with the displacement adjusting member through the positioning ring.

Optionally, the displacement adjusting assembly further comprises a limit nut, a second limit step is arranged on the shaft sleeve, one end of the bearing set abuts against the second limit step, and the other end of the bearing set is fixedly connected with the shaft sleeve through the limit nut.

Optionally, the driving shaft support device further comprises a support piece, wherein a first through hole is formed in the support piece, and the driving shaft penetrates through the first through hole.

Optionally, a spline pair is formed between the driving shaft and the driven member.

The invention has the beneficial effects that:

the invention provides an axial displacement adjusting device which comprises a driving shaft, a driven member and a displacement adjusting assembly. The driven part is connected on the driving shaft, and can rotate around its axis with the driving shaft is synchronous, and the displacement adjusting part is used for adjusting the axial displacement of driven part on the driving shaft, does not restrict the size of driven part, as long as it can connect all can carry out axial displacement's regulation on the driving shaft, and application scope is wide. Specifically, this displacement adjustment subassembly includes and rotates piece and displacement adjustment spare, and displacement adjustment spare interval cover is located outside the driving shaft, and coaxial with the driving shaft, rotates the piece and displacement adjustment spare threaded connection, rotates the piece, can make the axial displacement of displacement adjustment spare along the driving shaft. That is, the displacement regulating member can convert the rotational motion of the rotation member into the linear motion of the displacement regulating member. The displacement adjusting piece is connected with the driven piece, and then the driven piece is driven to move along the axial direction of the driving shaft. The axial displacement adjusting device provided by the invention has the advantages of high adjusting precision, large displacement adjustable range, simple structure and low manufacturing cost.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of an axial displacement adjustment device provided in an embodiment of the present invention;

fig. 2 is a sectional view of an axial displacement adjustment device provided in an embodiment of the present invention.

In the figure:

1. a drive shaft;

2. a driven member;

3. a displacement adjustment assembly; 31. a rotating member; 32. a displacement adjustment member; 321. a first limit step; 33. a housing; 331. a first positioning step; 332. a sealing cover; 34. a limiting shaft; 35. a drive member; 36. a shaft sleeve; 361. a second limit step; 37. a bearing set; 38. a positioning ring; 39. a limit nut;

4. a support member; 41. a first bearing;

5. a connecting member;

6. a fastener.

Detailed Description

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Example one

The present embodiment provides an axial displacement adjustment device for adjusting the axial displacement of a component rotating about an axis in a mechanical transmission. Specifically, as shown in fig. 1, the axial displacement adjusting device includes a driving shaft 1, a driven member 2, and a displacement adjusting assembly 3.

Wherein, follower 2 is connected on driving shaft 1, and can rotate around its axis with driving shaft 1 is synchronous, and displacement adjustment assembly 3 is used for adjusting the axial displacement of follower 2 on driving shaft 1. The size of the driven part 2 is not limited, and the axial displacement can be adjusted as long as the driven part can be connected to the driving shaft 1, so that the application range is wide.

Specifically, this displacement adjustment subassembly 3 includes rotating piece 31 and displacement adjustment piece 32, and displacement adjustment piece 32 interval cover is located outside driving shaft 1, and is coaxial with driving shaft 1, and rotating piece 31 and displacement adjustment piece 32 threaded connection rotate rotating piece 31, can make displacement adjustment piece 32 along the axial displacement of driving shaft 1. That is, the displacement regulating assembly 3 can convert the rotational motion of the rotation piece 31 into the linear motion of the displacement regulating piece 32. The displacement adjusting member 32 is connected to the driven member 2, and drives the driven member 2 to move in the axial direction of the drive shaft 1. The axial displacement adjusting device provided by the invention has the advantages of high adjusting precision, large displacement adjustable range, simple structure and low manufacturing cost.

Alternatively, as shown in fig. 2, a spline pair is formed between the driving shaft 1 and the driven member 2, and the driving shaft 1 drives the driven member 2 to synchronously rotate through the spline pair. In this embodiment, a spline groove is formed on the driving shaft 1, and a spline matched with the spline groove is formed on the driven member 2. The spline connection is reliable in connection and high in strength, and the driving shaft 1 and the driven part 2 are stressed uniformly and can bear larger load. Of course, in other embodiments, a spline may be provided on the driving shaft 1, and a spline groove may be provided on the driven member 2, both of which may function to rotate the driven member 2 and the driving shaft 1 synchronously.

Optionally, as shown in fig. 1 and fig. 2, the axial displacement adjusting device further includes a support member 4, a first through hole is formed in the support member 4, the driving shaft 1 penetrates through the first through hole, and the driving shaft 1 is further supported by the support member 4. Specifically, in the present embodiment, the first bearing 41 is also mounted on the support 4. An installation groove is formed in the inner wall of the first through hole of the support member 4, the first bearing 41 is clamped in the installation groove, the diameter of the inner ring of the first bearing 41 is the same as that of the first through hole, and the driving shaft 1 penetrates through the first bearing 41 and the first through hole. The axle shaft 1 is supported by the first bearing 41 while limiting the axial displacement of the axle shaft 1.

Optionally, as shown in fig. 2, the displacement adjusting assembly 3 further includes a housing 33, a second through hole is opened on the housing 33, the driving shaft 1 penetrates through the second through hole, and the housing 33 covers the rotating member 31 and the displacement adjusting member 32 to protect the rotating member 31 and the displacement adjusting member 32. In the present embodiment, the housing 33 is provided with a positioning structure for fixing the position between the rotating member 31 and the housing 33. Specifically, housing 33 includes a first housing half and a sealing cover 332, which first housing half and sealing cover 332 are capable of cooperating to form a closed housing 33. The first half shell is provided with an opening communicated with the inner cavity of the first half shell, the rotating piece 31 and the displacement adjusting piece 32 both enter the inner cavity of the first half shell through the opening, and the sealing cover 332 blocks the opening. The inner wall of the first half shell is provided with a first positioning step 331, one end of the rotating member 31 abuts against the first positioning step 331, and the other end abuts against the sealing cover 332. The position of the rotation member 31 relative to the housing 33 is fixed by the first positioning step 331 and the seal cover 332, so that the rotation member 31 can only rotate in the housing 33 and cannot move in the axial direction of the drive shaft 1.

Optionally, with continued reference to fig. 2, the rotating member 31 is disposed outside the displacement adjusting member 32 at an interval, and is coaxial with the displacement adjusting member 32, an internal thread is disposed along the inner wall circumference of the rotating member 31, and an external thread capable of matching with the internal thread is disposed on the outer circumference of the displacement adjusting member 32. When the rotating part 31 rotates around the axis of the driving shaft 1, the rotating motion of the rotating part 31 is converted into the linear motion of the displacement adjusting part 32 under the action of the internal thread and the external thread, and then the displacement adjusting part 32 is driven to move along the axial direction of the driving shaft 1.

Optionally, as shown in fig. 2, the displacement adjusting assembly 3 further includes a driving member 35, a fixed end of the driving member 35 is connected to the housing 33, an output end of the driving member 35 is connected to the rotating member 31 in a meshing manner, and an output end of the driving member 35 can drive the rotating member 31 to rotate around the axis of the driving shaft 1. In this embodiment, the rotating member 31 may be a worm gear structure, and the output end of the driving member 35 is connected with a worm to form a worm gear. The worm gear has large transmission ratio, compact structure, stable transmission and low noise. Illustratively, the driving member 35 may be selected as a motor, which has a large output power and is easy to control. Of course, in other embodiments, the rotating member 31 may alternatively be a gear structure, and the output end of the driving member 35 drives the gear to rotate, so as to drive the displacement adjusting member 32 to move, and further drive the driven member 2 to move along the axial direction of the driving shaft 1.

Optionally, as shown in fig. 2, the displacement adjusting assembly 3 further includes a limiting shaft 34, the limiting shaft 34 penetrates through the displacement adjusting member 32 and is parallel to the driving shaft 1, and the limiting shaft 34 is connected to the housing 33. In the embodiment, since the position of the rotating member 31 is fixed in the housing 33, the rotating member 31 can only rotate around the axis of the axle shaft 1 under the driving of the output end of the driving member 35, the displacement adjusting member 32 is connected with the rotating member 31 through threads, and the displacement adjusting member 32 moves along the axial direction of the axle shaft 1 under the action of the thread transmission. In order to further prevent the displacement adjusting member 32 from rotating, a stopper shaft 34 is provided, and the stopper shaft 34 penetrates the displacement adjusting member 32 and is coupled to the housing 33 so that the displacement adjusting member 32 can move only in the axial direction of the driveshaft 1. Preferably, the limiting shaft 34 can be arranged in a plurality at intervals along the circumferential direction of the driving shaft 1, so that the limiting effect is better. The two ends of the limiting shaft 34 extend out of the shell 33 and are fixedly connected with the shell 33 through nuts.

Optionally, as shown in fig. 2, the displacement adjusting assembly 3 further includes a shaft sleeve 36 and a bearing set 37, the shaft sleeve 36 is sleeved outside the driving shaft 1 and connected to the driven member 2, and the bearing set 37 connects the displacement adjusting member 32 and the shaft sleeve 36. Specifically, the outer race of the bearing set 37 is mounted within the displacement adjuster 32 and the inner race is coupled to the sleeve 36. The bearing set 37 can bear axial force, and when the displacement adjusting member 32 moves along the axial direction of the driving shaft 1, the bearing set 37 is driven to move, and then the shaft sleeve 36 and the driven member 2 connected with the shaft sleeve are driven to move.

Optionally, as shown in fig. 2, the displacement adjusting assembly 3 further includes a positioning ring 38, a first limit step 321 is disposed on the displacement adjusting element 32, one end of the bearing set 37 abuts against the first limit step 321, and the other end of the bearing set 37 is fixedly connected to the displacement adjusting element 32 through the positioning ring 38. The relative position between the bearing set 37 and the displacement adjusting member 32 is fixed by the first limit step 321 and the positioning ring 38, so that the displacement adjusting member 32 can drive the bearing set 37 to move synchronously, and the adjusting precision of the axial displacement adjusting device is further ensured.

Optionally, with reference to fig. 2, the displacement adjusting assembly 3 further includes a limiting nut 39, a second limiting step 361 is disposed on the shaft sleeve 36, one end of the bearing set 37 abuts against the second limiting step 361, and the other end of the bearing set 37 is fixedly connected to the shaft sleeve 36 through the limiting nut 39. The relative position between the bearing set 37 and the shaft sleeve 36 is fixed through the second limit step 361 and the limit nut 39, so that the bearing set 37 can drive the shaft sleeve 36 to move synchronously, and the adjustment precision of the axial displacement adjusting device is also guaranteed.

Optionally, as shown in fig. 1 and 2, the axial displacement adjustment device further comprises a connecting member 5 for connecting the sleeve 36 and the driven member 2. Specifically, the connecting member 5 is annular, and is sleeved outside the driving shaft 1 and sandwiched between the shaft sleeve 36 and the driven member 2. One end of the connecting piece 5 is connected with the shaft sleeve 36, and the other end is connected with the driven piece 2.

Preferably, as shown in fig. 2, the axial displacement adjusting means further includes a fastening member 6, and both ends of the connecting member 5 are connected to the sleeve 36 and the follower 2 through the fastening members 6, respectively. Exemplarily, in the present embodiment, the fastener 6 may be selected as a bolt or a screw. The connecting piece 5 is provided with a second through hole, the shaft sleeve 36 and the driven piece 2 are correspondingly provided with threaded holes, and the fastening piece 6 penetrates through the second through hole and is in threaded connection with the threaded holes. Threaded connection's joint strength is high, and the good reliability, and can dismantle, be favorable to improving this axial displacement adjusting device's application scope.

Example two

The present embodiment provides an axial displacement adjusting device, and the difference between the present embodiment and the first embodiment is that, in the present embodiment, the rotating member 31 is a gear structure, the output end of the driving member 35 is connected with an output gear, and a gear transmission is formed between the output gear and the rotating member 31. The gear transmission has the advantages of high transmission precision, high efficiency, compact structure, reliable work and long service life. The output gear is driven to rotate by the output end of the driving part 35, and the output gear is meshed with the rotating part 31 to drive the rotating part 31 to rotate around the axis of the driving shaft 1. When the rotating part 31 rotates around the axis of the driving shaft 1, the rotating motion of the rotating part 31 is converted into the linear motion of the displacement adjusting part 32 under the action of the internal thread and the external thread, and then the displacement adjusting part 32 is driven to move along the axial direction of the driving shaft 1, so that the driven part 2 is driven to move along the axial direction of the driving shaft 1 through the displacement adjusting part 32, and the position adjustment of the driven part 2 in the axial direction of the driving shaft 1 is completed.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. An axial displacement adjustment device, comprising:

a drive shaft (1);

a driven member (2) connected to the drive shaft (1) and capable of rotating around the axis thereof in synchronization with the drive shaft (1);

displacement adjusting part (3), displacement adjusting part (3) are including rotating piece (31) and displacement adjusting part (32), displacement adjusting part (32) space sleeve is located outside driving shaft (1), and with driving shaft (1) is coaxial, rotate piece (31) with displacement adjusting part (32) threaded connection, displacement adjusting part (32) with follower (2) link to each other, rotate piece (31), can make displacement adjusting part (32) drive follower (2) are followed the axial displacement of driving shaft (1).

2. The axial displacement adjustment device of claim 1, wherein the displacement adjustment assembly (3) further comprises a housing (33) and a limiting shaft (34), the housing (33) is covered outside the rotating member (31) and the displacement adjustment member (32), the limiting shaft (34) penetrates through the displacement adjustment member (32) and is parallel to the driving shaft (1), and the limiting shaft (34) is connected with the housing (33).

3. The axial displacement adjusting device according to claim 2, wherein the rotating member (31) is sleeved outside the displacement adjusting member (32) at intervals, is coaxial with the displacement adjusting member (32), is provided with an internal thread along the circumferential direction of the inner wall of the rotating member (31), and is provided with an external thread capable of being matched with the internal thread on the periphery of the displacement adjusting member (32).

4. The axial displacement adjustment device of claim 3, wherein the displacement adjustment assembly (3) further comprises a driving member (35), a fixed end of the driving member (35) is connected to the housing (33), an output end of the driving member (35) is connected to the rotation member (31), and the output end of the driving member (35) can drive the rotation member (31) to rotate around the axis of the driving shaft (1).

5. An axial displacement adjustment device according to claim 3, characterized in that a positioning structure is provided on the housing (33) for fixing the position between the rotary member (31) and the housing (33).

6. The axial displacement adjustment device of claim 1, wherein the displacement adjustment assembly (3) further comprises a bushing (36) and a bearing set (37), the bushing (36) is sleeved outside the driving shaft (1) and connected with the driven member (2), and the bearing set (37) connects the displacement adjustment member (32) and the bushing (36).

7. The axial displacement adjustment device of claim 6, wherein the displacement adjustment assembly (3) further comprises a positioning ring (38), the displacement adjustment member (32) is provided with a first limit step (321), one end of the bearing set (37) abuts against the first limit step (321), and the other end of the bearing set (37) is fixedly connected with the displacement adjustment member (32) through the positioning ring (38).

8. The axial displacement adjusting device of claim 6, wherein the displacement adjusting assembly (3) further comprises a limit nut (39), a second limit step (361) is disposed on the shaft sleeve (36), one end of the bearing set (37) abuts against the second limit step (361), and the other end of the bearing set (37) is fixedly connected with the shaft sleeve (36) through the limit nut (39).

9. The axial displacement adjusting device of claim 1, further comprising a support member (4), wherein the support member (4) is provided with a first through hole, and the driving shaft (1) penetrates through the first through hole.

10. Axial displacement adjustment device according to any one of claims 1-9, characterized in that a spline pair is formed between the drive shaft (1) and the driven member (2).

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