CN220268220U

CN220268220U - Gap adjustment sliding structure and parallel clamping jaw

Info

Publication number: CN220268220U
Application number: CN202322026973.XU
Authority: CN
Inventors: 李占贵
Original assignee: Suzhou Jodell Robotics Co ltd
Current assignee: Suzhou Jodell Robotics Co ltd
Priority date: 2023-07-31
Filing date: 2023-07-31
Publication date: 2023-12-29
Anticipated expiration: 2033-07-31

Abstract

The utility model discloses a gap adjusting sliding structure and parallel clamping jaws. The gap adjusting sliding structure comprises a first sliding piece and a second sliding piece, wherein a groove for accommodating the second sliding piece is formed in the first sliding piece, a positioning hole is formed in the side face of the second sliding piece, rolling bodies are arranged in the positioning hole, and a groove extending along the sliding direction is formed in the groove; an adjusting hole extending along the sliding direction is formed in the second sliding part and communicated with the positioning hole, an adjusting part is arranged in the adjusting hole and comprises a central shaft and adjusting surfaces which are arranged at intervals along the central shaft and correspond to the rolling bodies, and the rolling bodies are limited between the adjusting surfaces and the grooves. When the adjusting piece rotates or moves along the central shaft, the adjusting surface can be in contact with the rolling body and eliminate the gap between the rolling body and the groove, so that the precise movement with low friction and small gap is realized by using a simple structure, the cost is reduced, and the precision of the parallel clamping jaw rolling guide rail such as an electric clamping hand is facilitated.

Description

Gap adjustment sliding structure and parallel clamping jaw

Technical Field

The utility model relates to the technical field of parallel clamping jaws, in particular to a gap adjusting sliding structure and a parallel clamping jaw.

Background

The existing rolling linear guide rail has gaps between the balls or rollers and the guide rail due to assembly, processing precision and other reasons, and most of the rolling linear guide rail is a linear ball or roller guide rail which is formed by directly implanting steel balls or rollers and a retainer matched with the steel balls or rollers as required into the guide rail gaps of the mutual moving body, but the gaps cannot be adjusted, so that the guide rail precision and strength are weakened.

The gap-adjustable guide rail seen in the market generally adopts a mode of penetrating a fastener through a spring or a side surface to adjust the gap, but the guide shaking error still occurs when the spring is used, the mode of adopting the fastener is complex in operation and increases the whole width dimension, and the gap of a plurality of steel balls or cylinders cannot be synchronously adjusted, so that the gap between the steel balls or cylinders and the guide rail is different, and the abrasion of the guide rail and the steel balls is aggravated.

Disclosure of Invention

Aiming at the technical problems, the utility model aims at: the clearance adjustment sliding structure and the parallel clamping jaw are provided, the problem of clearance adjustment between the upper sliding block of the parallel clamping jaw and the guide rail is solved, required machining precision is reduced, and sliding effect is improved.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the gap adjusting sliding structure comprises a first sliding part and a second sliding part which are in sliding connection, wherein grooves for accommodating the second sliding part are formed in the first sliding part, positioning holes which are arranged at intervals along the sliding direction are formed in the side face of the second sliding part, spherical or columnar rolling bodies are arranged in the positioning holes, grooves which extend along the sliding direction are formed in the grooves, and the positions of the grooves correspond to the positioning holes; the second sliding part is internally provided with an adjusting hole extending along the sliding direction, the adjusting hole is communicated with the positioning hole, the adjusting part is arranged in the adjusting hole and comprises a central shaft and an adjusting surface which is arranged along the central shaft and corresponds to the rolling body, the rolling body is limited between the adjusting surface and the groove, and when the adjusting part rotates or moves along the central shaft, the distance between the adjusting surface and the positioning hole is gradually increased or gradually decreased.

Preferably, the adjusting surface is a plurality of conical surfaces arranged at intervals along a central shaft, and the central shaft is a rotating shaft of the conical surfaces; or a plurality of eccentric cams are arranged on the central shaft at intervals, and the adjusting surface is the peripheral surface of the cams.

Preferably, the central shaft is provided with a protruding part extending along the axial direction, the radial distance from the surface of the protruding part to the central shaft is gradually increased from two ends to the center in the cross section of the adjusting piece, and the adjusting surface is the surface of the protruding part.

Preferably, the adjusting surface is an inclined surface, and the inclined surface always faces the positioning hole.

Preferably, the number of the adjusting surfaces corresponds to that of the rolling bodies, and all the adjusting surfaces can be obtained by translating the same adjusting surface along the central axis.

Preferably, at least one end of the adjusting element is connected to the inner wall of the adjusting bore by a self-locking thread.

Preferably, the adjusting member is inserted directly into the adjusting hole, at least one end of the adjusting member is connected to the adjusting hole, and the adjusting member has a degree of freedom of movement and rotation in the direction of the central axis thereof.

Preferably, the adjusting surface, the rolling body and the groove surface are subjected to wear-resistant hardening treatment, so that the precision of the small gap is improved, the good wear-resistant effect is achieved, and the effective service life of the adjusting mechanism is prolonged.

The utility model provides a parallel clamping jaw, includes clearance adjustment sliding construction, be provided with two parallel slots on the first slider, be provided with the second slider in the slot respectively, two one side that the second slider is close to each other is provided with the draw-in groove, be provided with the rack in the draw-in groove, be provided with the breach of two slots of intercommunication on the first slider, be provided with the gear in the breach, the gear respectively with the both sides the rack meshing, the gear is rotated by a drive arrangement drive.

Preferably, the number of grooves in each groove is 2, wherein one groove corresponds to the clamping groove, and the rolling body and the adjusting piece correspond to the upper part, the lower part or both sides of the clamping groove.

Preferably, at least two rollers are arranged in the notch, the side surfaces of the rollers are in rolling contact with the second sliding piece, the rollers are positioned at two sides of the gear, and the distance between the two rollers at two sides of the gear is larger than the effective stroke length of the rack; a positioning table is formed between the two grooves, and the diameter of the roller is larger than the width of the positioning table.

Preferably, the rack is clamped in the clamping groove.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

the gap adjusting sliding structure comprises a first sliding part and a second sliding part which are in sliding connection, wherein the first sliding part is provided with grooves for accommodating the second sliding part, the side surface of the second sliding part is provided with positioning holes which are arranged at intervals along the sliding direction, rolling bodies are arranged in the positioning holes, grooves which extend along the sliding direction are arranged in the grooves, the second sliding part is internally provided with adjusting holes which are communicated with the positioning holes, the adjusting parts are arranged in the adjusting holes, each adjusting part comprises a central shaft and adjusting surfaces which are arranged at intervals along the central shaft and correspond to the rolling bodies, balls are limited between the adjusting surfaces and the grooves, when the adjusting parts rotate along the central shaft or linearly move along the central shaft, gaps between the rolling bodies and the grooves are adjusted through the contact points of the adjusting surfaces with different sizes, so that the rolling bodies roll smoothly between the grooves and the adjusting surfaces, the accurate movement with low friction and small gaps is realized by using a simple structure, and the cost is reduced, and the gap adjusting structure is beneficial to the accurate rolling guide rails of parallel clamping jaws such as electric clamping hands and the power consumption of a low friction motor.

Drawings

The technical scheme of the utility model is further described below with reference to the accompanying drawings:

FIG. 1 is a perspective view of a gap-adjusting slide structure of the present utility model;

FIG. 2 is a front view of the gap-adjusting slide structure of the present utility model;

FIG. 3 is a top view of the gap-adjusting slide structure of the present utility model;

FIG. 4 is an exploded view of the gap-adjusting slide structure of the present utility model;

FIG. 5 is a cross-sectional view A-A of FIG. 2;

FIG. 6 is a cross-sectional view B-B of FIG. 2;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 2;

figure 8 is a perspective view of the parallel jaw of the present utility model.

Wherein: 1. a first slider; 11. a groove; 12. a groove; 13. a notch; 14. a positioning table; 2. a second slider; 21. positioning holes; 22. an adjustment aperture; 23. a clamping groove; 3. a ball; 4. an adjusting member; 41. a central shaft; 42. adjusting the surface; 5. a rack; 6. a gear; 7. a driving device; 8. rolling bodies.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

The gap adjusting sliding structure and the parallel clamping jaw according to the utility model are shown in fig. 1-4, and comprise a first sliding part 1 and a second sliding part 2 which are connected in a sliding way, wherein a groove 11 for accommodating the second sliding part 2 is formed in the first sliding part 1, positioning holes 21 which are arranged at intervals along the sliding direction are formed in the side surface of the second sliding part 2, spherical or columnar rolling bodies 3 are arranged in the positioning holes 21, the diameter of the positioning holes 21 is slightly larger than the diameter of the spherical or columnar rolling bodies 3, and the rolling of the rolling bodies 3 is not influenced while the axial movement of the rolling bodies 3 is limited. Grooves 12 extending in the sliding direction are formed in the grooves 11, and the positions of the grooves 12 correspond to the positioning holes 21. The second sliding part 2 is internally provided with an adjusting hole 22 extending along the sliding direction, the adjusting hole 22 is communicated with the positioning hole 21, the adjusting part 4 is inserted into the adjusting hole 22, the adjusting part 4 comprises a central shaft 41 and adjusting surfaces 42 which are arranged along the central shaft 41 at intervals and correspond to the rolling bodies 3, the rolling bodies 3 are limited between the adjusting surfaces 42 and the grooves 12 and respectively contact with the adjusting surfaces 42 and the grooves 12, when the adjusting part 4 rotates or moves along the central shaft 41, the adjusting surfaces 42 can contact with the rolling bodies 3 and eliminate gaps between the rolling bodies 3 and the grooves 12 or increase gaps between the rolling bodies 3 and the grooves 12, so that the rolling bodies 3 can smoothly roll in the grooves 12 without blocking when the second sliding part 2 slides, the play and friction of the second sliding part 2 during sliding are reduced, and the integral sliding precision is improved. The gap adjusting sliding structure can reduce the machining precision of the groove guiding parts of the first sliding piece and the second sliding piece, and can possibly reduce the profile cost of the first sliding piece and the second sliding piece.

As shown in fig. 5, in the present embodiment, the adjustment surface 42 is a conical surface, and the central axis 41 is a rotation axis of the conical surface. When the adjusting piece 4 is pushed in the axial direction, the distance between the groove 12 and the adjusting surface 42 changes, so that the adjusting surface 42 is propped against the rolling body 3, a gap between the rolling body 3 and the groove 12 is eliminated, and the groove 12 is always contacted with the rolling body 3 when the first sliding piece 1 and the second sliding piece 2 slide relatively. The number of adjustment surfaces 42 corresponds to the number of rolling bodies 3, and in order to ensure that the centres of all spherical rolling bodies 3 are collinear or that the axes of the cylindrical rolling bodies are coplanar, all adjustment surfaces 42 can be obtained by translating the same adjustment surface 42 along the central axis 41. Meanwhile, when the rolling bodies 3 are contacted with the small end of the conical surface or the cylindrical end connected with the small end of the conical surface, the second sliding piece 2 can be smoothly loaded into the groove 12 of the first sliding piece 1 with the rolling bodies 3.

In another embodiment, the adjustment surface 42 may be an inclined surface facing the positioning hole 21. When the adjustment surface 42 is a bevel, the clearance between the rolling elements 3 and the groove 12 is eliminated by pushing the adjustment surface 42 against the rolling elements 3 by pushing the adjustment member 4 in the axial direction as well. At the same time, when the rolling bodies 3 are contacted with the lowest end of the inclined plane or the plane end connected with the lowest end of the inclined plane, the second sliding piece 2 can be smoothly loaded into the groove 12 of the first sliding piece 1 by carrying the rolling bodies 3.

In yet another embodiment, a plurality of eccentric cams are formed on the central shaft 41 at intervals, and the adjusting surface 42 is an outer circumferential surface of the cam. When the central shaft 41 rotates, the distance between the cam and the corresponding positioning hole 21 axially changes, and at this time, the distance between the groove 12 and the adjusting surface 42 needs to be changed by rotating the adjusting member 4, so that the rolling bodies 3 roll smoothly in the groove 12 with a small gap.

In a further embodiment, the central shaft 41 is formed with axially extending projections, the length of which covers the extent of all the rolling bodies 3, the radial distance from the surface of which to the central shaft in the cross section of the adjustment member 4 increases gradually from both ends to the center, the adjustment surface 42 being the surface of which. When the central shaft 41 rotates, the distance of the surface of the boss corresponding to the positioning hole 21 changes axially, and at this time the distance between the groove 12 and the adjustment surface 42 is also changed by rotating the adjustment member 4. In this case, the boss is integrated without segmentation, and compared with the embodiment of a plurality of cams, the structure is simpler, and the processing is convenient.

The regulating member 4 is inserted straight into the regulating hole 22, at least one end portion of the regulating member 4 is connected to the regulating hole 22, and the regulating member 4 has a degree of freedom of movement and rotation in the direction of its central axis. At least one end of the adjusting piece 4 is connected to the inner wall of the adjusting hole 22 through threads, and part of the adjusting piece protrudes out of the adjusting hole 22, and the threads are in precise fit with the adjusting hole 22 and have a thread self-locking function so as to be convenient for adjusting and preventing loosening and failure after setting. The internal thread of the adjusting hole 22 has enough effective adjusting length, so that the basic requirement of the axial dimension of the gap adjusting purpose can be met by carrying the adjusting surface 42 when the screw end on the adjusting piece 4 rotates and moves, the adjusting piece 4 can be controlled to rotate in the adjusting hole 22 in a spiral way through the rotating protruding part, and therefore the adjusting surfaces 42 with different diameters can be propped against the rolling bodies 3, and the gap adjusting effect can be achieved.

In other embodiments, the adjusting hole 22 is a through hole, and two ends of the adjusting piece 4 are connected with the inner wall of the adjusting hole 22 through threads, so that the adjusting piece 4 can be rotated bidirectionally, the stability of the adjusting piece 4 is improved, the bending of the elongated adjusting piece 4 caused by uneven stress for a long time is avoided, the adjusting precision is reduced, and the adjusting effect is improved.

The utility model also provides a parallel clamping jaw, which comprises the gap adjusting sliding mechanism, wherein the first sliding part 1 is provided with two parallel grooves 11, the grooves 11 are respectively provided with the second sliding parts 2, one sides of the two second sliding parts 2, which are close to each other, are provided with clamping grooves 23, racks 5 are arranged in the clamping grooves 23, the racks 5 are clamped by interference fit or fixed in the clamping grooves 23 in an adhesive manner, reliable connection is ensured, the racks 5 can be manufactured into a profile shape in a standardized batch mode to reduce cost, and the racks are cut off and embedded into the clamping jaw according to stroke requirements. The rack 5 and the second sliding piece 2 can be made of different materials, and the sliding block can be shaped to reduce processing. The first sliding piece 1 is provided with a notch 13 which is communicated with the two grooves 11, a gear 6 is arranged in the notch 13, the gear 6 is respectively meshed with racks 5 on two sides, and as shown in figure 8, the gear 6 is driven to rotate by a driving device 7 to drive the second sliding pieces 2 on two sides to relatively move.

As shown in fig. 4, the number of grooves 12 in each groove 11 is 2, wherein one groove 12 corresponds to a clamping groove 23, and the rolling element 3 and the adjusting element 4 correspond to the upper side, the lower side or both sides of the clamping groove 23. As shown in fig. 7, the groove 12 is provided with the rolling bodies 3 for reducing friction force, and similarly, the second sliding parts 2 are respectively provided with an adjusting part 4 at two sides of the clamping groove 23 for adjusting the gap between the rolling bodies 3 at two sides of the clamping groove 23 and the groove 12, so that the movement is smoother. The rolling body 3 can be a linear rolling ball guide rail formed by spherical matched circular hole type positioning holes and semicircular arc grooves, or a linear roller guide rail formed by cylindrical columnar matched rectangular positioning holes and rectangular grooves, so as to realize different rolling linear bearing strength requirements. In order to ensure uniform clearance between each rolling element 3 and the corresponding groove 12, the inner bottom surface of the groove 12 of the first sliding element 1 needs to be equidistant from each rolling center or roller axis, and the bottom surface of the groove 12 is not allowed to incline relative to the mouth surface.

As shown in fig. 6, at least two rollers 8 are arranged in the notch 13, the side surfaces of the rollers 8 are in rolling contact with the second sliding piece 2, the rollers 8 are positioned on two sides of the gear 6, and the distance between the two rollers 8 on two sides of the gear 6 is larger than the effective stroke length of the rack 5. A positioning table 14 is formed between the two grooves 11 to assist in positioning the second sliding member 2, and the diameter of the roller 8 is larger than the width of the positioning table 14, so as to avoid interference caused by the sliding of the positioning table 14 to the second sliding member 2. In this embodiment, the first slider 1 and the positioning table 14 are integrally formed.

The gap adjusting sliding structure and the parallel clamping jaw aim at solving the problem that the gap between the first sliding part 1 and the second sliding part 2 of the parallel clamping jaw is adjustable, and the gap adjusting sliding structure and the parallel clamping jaw aim at solving the problems that the machining precision and the profile cost reduction are possible, and the inclined plane or the conical surface on the adjusting part 4 or the cam or the eccentric shaft is utilized to rotate so as to enable the rolling body 3 contacted with the inclined plane or the conical surface to move outwards along the positioning hole 21, thereby eliminating the gap between the rolling body 3 and the groove 12, ensuring the precise movement of the second sliding part 2 along the direction of the groove 12 with low friction and small gap, and bringing benefits to the precision of the rolling guide rail of the parallel clamping jaw such as an electric clamping hand and the power consumption of a low friction motor.

The second sliding part 2 realizes the positioning of the rolling bodies in the adjusting movement of the mounting holes through the side-opening positioning holes 21, realizes the function of the bearing retainer, simplifies the structure and reduces the cost, and avoids the mounting difficulty and high cost pressure caused by independently adopting the linear ball bearing or the roller bearing with the retainer.

The gap adjusting sliding structure can be applied to pneumatic and electric sliding rail structures and the like, the moving structure of the sliding member is not limited to the rack-and-pinion structure, and a linear motor or an air cylinder or a hydraulic cylinder can be used for driving the movement of the crank connecting rod structure or the grooved pulley structure so as to facilitate the movement of the second sliding member 2 along the groove 12 of the first sliding member 1.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related arts are included in the scope of the present utility model.

Claims

1. A gap-adjusting sliding structure, characterized in that: the sliding type sliding device comprises a first sliding part (1) and a second sliding part (2) which are in sliding connection, wherein a groove (11) for accommodating the second sliding part (2) is formed in the first sliding part (1), positioning holes (21) which are arranged at intervals along the sliding direction are formed in the side face of the second sliding part (2), spherical or columnar rolling bodies (3) are arranged in the positioning holes (21), a groove (12) which extends along the sliding direction is formed in the groove (11), and the position of the groove (12) corresponds to the positioning holes (21); be provided with in second slider (2) along slip direction extension's regulation hole (22), regulation hole (22) and locating hole (21) intercommunication, be provided with regulation piece (4) in regulation hole (22), regulation piece (4) include center pin (41) and along center pin (41) set up with rolling element (3) corresponding regulating surface (42), rolling element (3) are restricted between regulating surface (42) and recess (12), when regulation piece (4) rotate or remove along center pin (41), regulating surface (42) with the distance in locating hole increases gradually or reduces gradually.

2. The lash adjustment slide structure according to claim 1, characterized in that: the adjusting surfaces (42) are a plurality of conical surfaces arranged at intervals along a central shaft (41), and the central shaft (41) is a rotating shaft of the conical surfaces; or a plurality of eccentric cams are arranged on the central shaft (41) at intervals, and the adjusting surface (42) is the peripheral surface of the cams.

3. The lash adjustment slide structure according to claim 1, characterized in that: the central shaft (41) is provided with a protruding part extending along the axial direction, the radial distance from the surface of the protruding part to the central shaft (41) is gradually increased from two ends to the center in the cross section of the adjusting piece (4), and the adjusting surface (42) is the surface of the protruding part.

4. The lash adjustment slide structure according to claim 1, characterized in that: the adjusting surface (42) is an inclined surface, and the inclined surface always faces the positioning hole.

5. The lash adjustment slide structure according to claim 1, characterized in that: the number of the adjusting surfaces (42) corresponds to that of the rolling bodies (3), and all the adjusting surfaces (42) can be obtained by translating the same adjusting surface (42) along the central shaft (41).

6. The lash adjustment slide structure according to claim 1, characterized in that: at least one end of the adjusting piece (4) is connected to the inner wall of the adjusting hole (22) through self-locking threads.

7. The lash adjustment slide structure according to claim 1, characterized in that: the adjusting piece (4) is directly inserted into the adjusting hole (22), at least one end part of the adjusting piece (4) is connected with the adjusting hole (22), and the adjusting piece (4) has the freedom degree of movement and rotation along the central axis direction.

8. A parallel jaw comprising a gap-adjusting slide as claimed in any one of claims 1-7, characterized in that: be provided with two parallel slot (11) on first slider (1), be provided with second slider (2) in slot (11) respectively, two one side that second slider (2) are close to each other is provided with draw-in groove (23), be provided with rack (5) in draw-in groove (23), be provided with breach (13) of two slot (11) of intercommunication on first slider (1), be provided with gear (6) in breach (13), gear (6) respectively with both sides rack (5) meshing, gear (6) are rotated by a drive arrangement (7) drive.

9. The parallel jaw of claim 8, wherein: the number of grooves (12) in each groove (11) is 2, one groove (12) corresponds to the clamping groove (23), and the rolling body (3) and the adjusting piece (4) correspond to the upper part, the lower part or the two sides of the clamping groove (23).

10. The parallel jaw of claim 8, wherein: at least two rollers (8) are arranged in the notch (13), the side surfaces of the rollers are in rolling contact with the second sliding piece, the rollers (8) are positioned at two sides of the gear (6), and the distance between the two rollers (8) at two sides of the gear (6) is larger than the effective stroke length of the rack (5); a positioning table (14) is formed between the two grooves (11), and the diameter of the roller (8) is larger than the width of the positioning table (14).

11. The parallel jaw of claim 8, wherein: the rack (5) is clamped in the clamping groove (23).