CN211414893U

CN211414893U - Quick centering fixture for tire

Info

Publication number: CN211414893U
Application number: CN201922148167.3U
Authority: CN
Inventors: 朱晓鹰; 朱岩; 牛雪倩
Original assignee: Beijing Keji Jiade Intelligent Technology Co ltd
Current assignee: Beijing Keji Jiade Intelligent Technology Co ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-09-04
Anticipated expiration: 2029-12-04

Abstract

The utility model discloses a tire quick centering fixture, which comprises a fixture main body component, wherein the fixture main body component comprises a seat body and three guide rails extending outwards, a slide seat is arranged on each guide rail, and a clamping jaw for holding a tire tightly is fixed on each slide seat; the gear rack transmission mechanism comprises three racks, one end of each rack is fixedly connected with the sliding seat and is arranged in parallel with the guide rail in the opposite direction, a central shaft sleeve is arranged in the seat body, a gear is fixed on the central shaft sleeve, and the three racks are respectively in meshing transmission with the gear; the locking mechanism comprises a ratchet wheel, a positioning pin rod and a positioning pin telescopic component, the ratchet wheel is fixed on the central shaft sleeve, and the positioning pin telescopic component drives the positioning pin rod to be clamped with or separated from the ratchet wheel. The utility model discloses, adopt rack and pinion drive mechanism, can improve the regulation stroke of anchor clamps, the governing speed is fast, improves work efficiency, and locking mechanical system can be quick the rotation direction of control during operation rack and pinion drive mechanism and the clamping jaw that corresponds, unidirectional rotation improves the security.

Description

Quick centering fixture for tire

Technical Field

The utility model belongs to the technical field of auto wheel angular surveying, concretely relates to quick centering anchor clamps of tire.

Background

The rapid wheel center positioning clamp in the market mainly comprises a four-point type clamp and a three-point type clamp, and comprises a screw rod type, a 3-point or circular ring positioning mode, a two-claw tire-holding clamping mode and a three-claw tire-holding mode. Because most vehicles at present adopt aluminum alloy wheel hubs or wheel decorative covers, in order to ensure that the decoration of the wheel surface is not damaged during maintenance, more and more customers adopt a clamp in a three-claw tire holding mode. At present, a clamp adopting a three-jaw tire holding mode mostly adopts a crank connecting rod transmission mode, and synchronous centering of three jaws is guaranteed. The worm gear mode ensures locking or screw rod mode locking. The stroke is little, the speed of regulation is slow, and the anchor clamps structure is relatively complicated.

Therefore, the defects of small working stroke, low adjusting speed and the like of the conventional tire centering clamp exist in the prior technical scheme.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the prior art that tire centering anchor clamps working stroke is little, and governing speed shortcoming such as slow.

For this reason, the technical scheme who adopts is, the utility model discloses a quick centering fixture of tire, include:

the fixture main body assembly comprises a hollow cylindrical base body and three guide rails which are arranged along the circumference of the base body and extend outwards, a sliding seat is arranged on each guide rail, and a clamping jaw for tightly holding a tire is fixed on each sliding seat;

the gear rack transmission mechanism comprises three racks, one end of each rack is fixedly connected with the sliding seat and is arranged in parallel with the guide rail in the opposite direction, a central shaft sleeve is arranged in the seat body, a gear is fixed on the central shaft sleeve, the three racks are respectively in meshing transmission with the gear, and a hand wheel for driving the central shaft sleeve to rotate is arranged at the upper end of the central shaft sleeve;

the locking mechanism comprises a ratchet wheel, a positioning pin rod and a positioning pin telescopic component, the ratchet wheel is fixed on the central shaft sleeve and is arranged adjacent to the gear, and the positioning pin telescopic component drives the positioning pin rod to be clamped or separated with or from the ratchet wheel;

when the positioning pin rod is clamped with the ratchet wheel, the hand wheel is rotated to drive the central shaft sleeve to rotate in a single direction, the three racks rotate synchronously with the central shaft sleeve and drive the clamping jaw to clamp the tire, and when the positioning pin rod is separated from the ratchet wheel, the hand wheel is rotated to drive the central shaft sleeve, the racks and the clamping jaw to rotate freely.

Preferably, one end of the seat body is closed, the other end of the seat body is provided with an end cover, a through center hole is formed in the center of the end cover, and the center shaft sleeve penetrates through the center hole.

Preferably, the three guide rails are arranged in a Y shape, a penetrating wedge-shaped square hole is formed below each guide rail on the seat body, and the rack is inserted into the wedge-shaped square hole from the direction opposite to the extending direction of the guide rails and fixed on the corresponding slide seat.

Preferably, there is a height difference between the guide rails, and the thickness of the sliding seats on the guide rails is different to compensate for the height difference, so that the clamping jaws are located in the same horizontal plane.

Preferably, a guide part protrudes from the side surface of the seat body, a guide hole for the positioning pin rod to pass through is formed in the guide part, an annular clamping block protrudes from the front part of the positioning pin rod, and the annular clamping block is arranged in the guide hole.

Preferably, the front end of the positioning pin rod is provided with an engaging part engaged with the tooth back of the ratchet wheel, and the engaging part is in a slope shape.

Preferably, the locating pin telescopic member comprises a connecting plate fixedly connected with the base body, a concave wheel, a cam and a return spring, the concave wheel, the cam and the return spring are all arranged on the locating pin rod in a penetrating manner, the concave wheel and the cam are matched with each other, the concave wheel is fixed on the connecting plate,

one end of the reset spring is pressed on the lower plane of the concave wheel, the other end of the reset spring is pressed on a limit pin of the locating pin rod, and a bolt cap is fixed at the rear end of the locating pin rod.

Preferably, the concave wheel is provided with a plurality of concave inclined planes with a rotation angle, and the cam is provided with a convex inclined plane matched with the concave inclined planes.

Preferably, the cam is provided with an operating handle, the connecting plate is provided with an inclined groove for the operating handle to be clamped in, the operating handle is pulled to drive the convex inclined plane of the cam to rotate up or down along the concave inclined plane of the concave wheel, and then the positioning pin rod is driven to be separated from or clamped with the ratchet wheel.

Preferably, a handle is arranged at the upper end of one of the guide rails.

Preferably, the outer end of the clamping jaw is a clamping part, and friction bulges are uniformly arranged on the outer side surface of the clamping part contacting with the tire.

The utility model discloses technical scheme has following advantage: the utility model discloses an adopt rack and pinion drive mechanism, can improve the regulation stroke of anchor clamps, can calibrate or centering to the tire of different models and size, and the regulation speed is fast, and the work efficiency is improved, the direction of rotation of the control during operation rack and pinion drive mechanism that locking mechanical system can be quick and the clamping jaw that corresponds, one-way rotation, avoid the reversal to lead to the previous work to abandon, improve security and work validity, whole anchor clamps realize work through the hand wheel, simple easy operation, accord with the market demand, high practicality has.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

The technical solution of the present invention is further described in detail by the accompanying drawings and examples.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a cross-sectional view of the present invention;

FIG. 4 is a schematic view of the seat body with guide rails of the present invention;

FIG. 5 is a schematic view of the wedge-shaped square hole structure of the seat body of the present invention;

FIG. 6 is a schematic structural view of a positioning target mounting structure of the present invention;

fig. 7 is a schematic structural diagram of a locking mechanism of the present invention;

fig. 8 is an exploded view of the locking mechanism of the present invention;

FIG. 9 is a diagram illustrating a state where the ratchet is locked by the pin rod;

fig. 10 is a state diagram of the present invention in which the detent pin is separated from the ratchet.

The drawings are numbered as follows: 1-seat body, 2-rack, 3-slide seat, 4-clamping jaw, 41-clamping part, 42-friction bulge, 5-hand wheel, 6-positioning target seat structure, 7-locking mechanism, 8-guide rail, 9-wedge square hole, 10-end cover, 11-handle, 12-central shaft sleeve, 13-ratchet wheel, 14-gear, 15-support, 16-positioning target seat, 17-positioning pin rod, 171-annular clamping block, 172-clamping part, 18-guide part, 181-guide hole, 19-concave wheel, 191-concave slope, 20-cam, 201-operating handle, 202-convex slope, 21-connecting plate, 211-slope groove, 22-return spring and 23-bolt cap.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

In the description of the present application, it is to be understood that the terms "intermediate," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular orientation, and thus should not be construed as limiting the present application. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In addition, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean, for example, that there may be a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. 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.

Referring to fig. 1, 4, 5, the utility model provides a quick centering fixture of tire includes anchor clamps main part subassembly, rack and pinion drive mechanism, locking mechanical system 7, hand wheel subassembly etc.. Wherein anchor clamps main part subassembly includes pedestal 1 and follows 1 circumference interval arrangement of pedestal and three guide rails 8 of outside extension, and guide rail 8 and pedestal 1 can separately process, and the upper end of one of them guide rail 8 is provided with handle 11, conveniently gets when not using and puts. The base body 1 is in a hollow cylinder shape, one end of the base body 1 is closed, the other end of the base body is provided with an end cover 10, and the center of the end cover 10 is provided with a through center hole. A central shaft sleeve 12 is installed in the seat body 1, the central shaft sleeve 12 penetrates through a central hole, and bearings are respectively arranged on the seat body 1 and the end cover 10, are connected with the central shaft sleeve 12 and support the central shaft sleeve 12 to rotate.

In addition, the four-wheel positioning device also comprises a positioning target seat structure 6 which is composed of a positioning target seat 16 and a support 15, wherein the support 15 is fixed at the lower end of the seat body 1, a through hole is formed in the center of the central shaft sleeve 12, the support 15 penetrates through the through hole and is in movable fit with the central shaft sleeve 12, the positioning target seat is connected with the upper end of the support 15, when the central shaft sleeve 12 rotates, the positioning target seat 16 does not rotate along with the through hole, and a target is arranged on the positioning target seat 16 and used for measuring the wheel angle to perform four-wheel positioning. A hand wheel 5 is fixed on the upper end of the central shaft sleeve 12, and the hand wheel 5 is rotated to drive the central shaft sleeve 12 to rotate

Three guide rails 8 are installed along the direction of circumference to pedestal 1, and three guide rails 8 are the Y type setting, and this kind of mode of setting can avoid colliding with ground when rotatory tire work. Height difference exists between each guide rail 8, and every guide rail 8 all disposes slide 3, is fixed with the clamping jaw 4 that is used for holding tightly the tire on slide 3. In order to avoid the height difference of the guide rails 8 from affecting the clamping jaws 4, the sliding seats 3 on the guide rails 8 are designed to have different thicknesses so as to compensate for the height difference formed between the guide rails 8, and finally, the clamping jaws 4 are positioned in the same horizontal plane and can apply force uniformly when holding a tire.

The outer end of clamping jaw 4 is clamping part 41, evenly is equipped with friction protrusion 42 on the lateral surface that clamping part 41 and tire contacted, and friction between clamping part 41 and the tire has been improved in the setting of friction protrusion 42, avoids appearing the slippage phenomenon.

Referring to fig. 1, 2, 3 and 5, the rack-and-pinion transmission mechanism includes three racks 2, one end of each rack 2 is fixedly connected to the sliding base 3 and is arranged in parallel with the guide rail 8 in the opposite direction, specifically, a through wedge-shaped square hole 9 is formed below each guide rail 8 on the base 1, and the rack 2 is inserted into the wedge-shaped square hole 9 from the direction opposite to the extending direction of the guide rail 8 and is fixed on the corresponding sliding base 3. In the casting process of the base body 1, based on the three guide rails 8 which are not uniformly arranged, each wedge-shaped square hole 9 is also arranged by adopting a wedge-shaped angle, the casting mode is usually adopted when the base body is manufactured, namely, a wedge-shaped core is adopted, the core-pulling mode is adopted, the wedge-shaped core is ensured not to be broken in order to facilitate operation, the function of the wedge-shaped square hole is ensured, and the processing is simple and feasible. The wedge-shaped square hole 9 can also be formed by cutting.

The gear 14 is fixedly arranged on the central shaft sleeve 12, the three racks 2 are respectively meshed with the gear 14 for transmission, and the length of each rack 2 can be flexibly arranged relatively, so that compared with the existing crank connecting rod transmission mode or gear transmission mode, the stroke of the gear rack transmission can be in a larger range, and the integral size of a product is compact. This configuration enables the jaw 4 to be adapted to tires of different sizes and specifications, with a wider range of applications.

Referring to fig. 7, 8, 9 and 10, the locking mechanism 7 comprises a ratchet wheel 13, a positioning pin rod 17 and a positioning pin telescopic member, wherein the ratchet wheel 13 is fixed on the central shaft sleeve 12 and is arranged adjacent to the gear 14, and the ratchet wheel and the gear are arranged closely to each other, so that the overall size is reduced. The locating pin telescopic component drives the locating pin rod 17 to realize the clamping or separation with the ratchet wheel 13.

Specifically, a guide portion 18 protrudes from a side surface of the seat body 1, the guide portion 18 can be integrally formed with the seat body 1, and a guide hole 181 for the positioning pin 17 to pass through is formed in the guide portion 18. The annular fixture block 171 is protruded from the front part of the positioning pin rod 17, the annular fixture block 171 is arranged in the guide hole 181, the diameter of the annular fixture block 171 is slightly smaller than that of the guide hole 181, a guiding effect is achieved, the positioning pin rod 17 can be ensured to be stretched and retracted in the guide hole 181 smoothly, and large-angle inclination cannot occur.

The front end of the positioning pin rod 17 is provided with a clamping part 172 clamped with the tooth back of the ratchet wheel 13, the clamping part 172 is in a slope shape, when the clamping part 172 is in a clamping state with the ratchet wheel 13, according to the working principle of the ratchet wheel 13, the hand wheel 5 rotates to drive the central shaft sleeve 12 to rotate at the moment, and the central shaft sleeve 12 is fixed with the ratchet wheel 13, so that the central shaft sleeve 12 can only rotate in a single direction, the single-direction rotation can drive the clamp 4 to rotate in a single direction, namely, the single-direction rotation is towards the trend of clamping the tire, the phenomenon that the reversal leads to the final work is avoided, and the safety and the working.

The locating pin telescopic member comprises a connecting plate 21 fixedly connected with the base body 1, a concave wheel 19, a cam 20 and a return spring 22, the concave wheel 19, the cam 20 and the return spring 22 are all arranged on the locating pin rod 17 in a penetrating mode, the concave wheel 19 and the cam 20 are matched with each other, the concave wheel 19 is fixed on the connecting plate 21, one end of the return spring 22 is pressed on the lower plane of the concave wheel 19, the other end of the return spring is pressed on a limiting pin of the locating pin rod 17, and a bolt cap 23 is fixed at the rear end of the locating pin rod 17.

The concave wheel 19 is provided with a plurality of concave inclined planes 191 with a rotation angle, and the cam 20 is provided with a convex inclined plane 202 matched with the concave inclined planes 191. The cam 20 is provided with an operating handle 201, the connecting plate 21 is provided with an inclined groove 211, and the operating handle 201 is clamped in the inclined groove 211. When the operating handle 201 is pulled, the convex inclined surface 202 of the cam 20 rotates and rises along the concave inclined surface 191 of the concave wheel 19, the cam 20 pushes the nut 23 to drive the positioning pin rod 17 to move upwards synchronously, the positioning pin rod 17 is further driven to be separated from the ratchet wheel 13, and at the moment, the return spring 22 is compressed. When the lower end surface of the cam 20 rises to the upper plane of the recessed wheel 19, positioning is performed with the spring 22 in the maximum compression state.

When the operating handle 201 is pulled again, the cam 20 rotates clockwise around the detent pin 17, the detent pin 17 is reset by the elastic restoring force of the return spring 22, and the engaging portion 172 of the detent pin 17 and the ratchet 13 return to the engaged state.

This patent, can realize through the operating handle 201 that pulls cam 20 with the inseparable lock or stagger of concave wheel 19, and then drive the set pin pole 17 and ratchet 13 block or separation, simple structure, convenient operation.

The working principle of this patent is as follows:

when the tire needs to be centered or calibrated, the positioning clamp is taken for use through the handle 11, before the tire is not used, the distance between the three clamping jaws 4 and the central shaft sleeve 12 is adjusted according to the size of the tire, the handle 201 is rotated by hand, the cam 20 rotates by taking the positioning pin rod 17 as an axis, the convex inclined surface 202 of the cam 20 rotates and rises along the concave inclined surface 191 of the concave wheel 19, as mentioned above, the positioning pin rod 17 and the ratchet wheel 13 are in a separated state, at the moment, the hand wheel 5 can be rotated according to the specific conditions of the tire, the gear 14 is meshed and driven along the rack 2, after the proper position is adjusted, the handle 201 is rotated by hand, the positioning pin rod 17 returns to the inclined groove 211, at the moment, the positioning pin rod 17 is clamped with the ratchet wheel 13, and the hand wheel 5 can only drive the central shaft sleeve 12.

The centering fixture is aligned to a tire, the tire is clamped by the three clamping jaws 4, the hand wheel 5 is rotated, the hand wheel 5 drives the central shaft sleeve 12 to rotate in a single direction, the central shaft sleeve 12 drives the gear 14 to rotate along the rack 2, the clamping jaws 4 shrink along with the rotation to gradually clamp the tire, the rotation is stopped after a certain clamping force is reached, and due to the existence of the locking mechanism 7, the hand wheel 5 cannot be reversed even if the hand is loosened, so that the centering fixture is good in safety performance and higher in flexibility.

The utility model discloses, through adopting rack and pinion drive mechanism, can improve the regulation stroke of anchor clamps, can calibrate or centering to the tire of different models and size, and the regulation speed is fast, and the work efficiency is improved, the direction of rotation of the control during operation rack and pinion drive mechanism that locking mechanical system 7 can be quick and the clamping jaw that corresponds, one-way rotation, avoid the reversal to lead to the previous work to abandon, improve security and work validity, whole anchor clamps realize work through the hand wheel, simple easy operation, accord with the market demand, high practicality has.

It should be noted that the above embodiments are all preferred embodiments, relevant functional components may be replaced by other components, and the related units and modules are not necessarily required by the present application. The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

The tire quick centering fixture provided by the application is described in detail above, and specific examples are applied in the description to explain the principle and the implementation of the application, and the description of the above embodiments is only used to help understand the method and the core idea of the application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. A tire quick centering fixture, comprising:

2. A tire quick centering fixture as claimed in claim 1, wherein said base body is closed at one end and fitted with an end cap at the other end, said end cap having a central hole formed therethrough at the center thereof, said central boss passing through said central hole.

3. The tire quick centering fixture of claim 2, wherein three of said guide rails are arranged in a Y shape, a wedge-shaped square hole is formed in said base body below each of said guide rails, and said rack is inserted into said wedge-shaped square hole from a direction opposite to an extending direction of said guide rails and fixed on said corresponding slide base.

4. A tire quick centering fixture as claimed in claim 3, wherein there is a height difference between said rails, and said slide on said rails has different thickness to compensate for said height difference, so that each of said jaws is in the same horizontal plane.

5. The tire quick centering fixture of claim 1, wherein a guide portion protrudes from a side surface of the base body, the guide portion has a guide hole for the positioning pin to pass through, a front portion of the positioning pin protrudes with an annular block, and the annular block is disposed in the guide hole.

6. The tire quick centering fixture of claim 1, wherein the front end of the dowel bar is provided with a clamping portion clamped with the tooth back of the ratchet wheel, and the clamping portion is in a slope shape.

7. The tire fast centering fixture according to claim 1, wherein said locating pin retractable member comprises a connection plate fixedly connected to said base, a concave wheel, a cam and a return spring, said concave wheel, cam and said return spring are all disposed on said locating pin rod, said concave wheel and said cam are matched with each other and said concave wheel is fixed on said connection plate,

8. The tire quick centering fixture of claim 7, wherein said concave wheel is provided with a plurality of concave slopes of rotation angle, and said cam is provided with a convex slope adapted to said concave slopes.

9. The tire fast centering fixture according to claim 8, wherein the cam is provided with an operating handle, the connecting plate is provided with an inclined groove for the operating handle to be clamped in, the operating handle is pulled to drive the convex inclined surface of the cam to rotate up or down along the concave inclined surface of the concave wheel, and further drive the positioning pin rod to be separated from or clamped with the ratchet wheel.

10. A tire quick centering fixture as claimed in claim 1, wherein a handle is provided at an upper end of one of said rails.

11. The tire quick centering fixture of claim 1, wherein the outer end of the clamping jaw is a clamping portion, and the outer side surface of the clamping portion contacting with the tire is uniformly provided with friction protrusions.