CN215999528U

CN215999528U - Drilling positioning fixture for steering knuckle arm

Info

Publication number: CN215999528U
Application number: CN202121977150.XU
Authority: CN
Inventors: 钟晶晶; 王战兵; 李奎富; 甘龙; 肖烈; 杨国庆; 周润秋; 邴涵; 李海明; 杨军伟
Original assignee: Hubei Tri Ring Forging Co Ltd
Current assignee: Hubei Tri Ring Forging Co Ltd
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2022-03-11
Anticipated expiration: 2031-08-20

Abstract

The utility model relates to a punching positioning fixture for a knuckle arm, which is used for positioning and clamping a knuckle arm blank and comprises a bottom plate, a first end positioning assembly, a second end positioning assembly and a middle positioning assembly, wherein the bottom plate is provided with a first positioning hole and a second positioning hole; the upper end of the bottom plate is provided with a straight mounting surface, and the first end positioning assembly and the second end positioning assembly are mounted in parallel on the front part of the straight mounting surface; the first end positioning assembly comprises a V-shaped positioning block and a first pressing piece, a V-shaped groove is formed at the upper end of the V-shaped positioning block, and the first pressing piece is arranged above the V-shaped groove; the second end positioning assembly comprises an end supporting piece and two positioning clamping pieces which are oppositely arranged, the two positioning clamping pieces are arranged on the same side of the V-shaped positioning block at intervals from left to right, and the end supporting piece is arranged on the bottom plate; the middle positioning component is arranged at the rear part of the flat mounting surface and comprises a middle supporting piece and a second pressing piece.

Description

Drilling positioning fixture for steering knuckle arm

Technical Field

The utility model relates to processing technology equipment of a steering knuckle arm, in particular to a punching positioning clamp of the steering knuckle arm.

Background

The knuckle arm is the last level of power transmission part of the automobile steering transmission device, has the function of connecting a drag link and a knuckle and has a steering function. When the automobile is turned, a driver applies a steering torque to a steering wheel, the torque passes through a steering shaft, a transmission shaft and a steering gear in sequence, is amplified by the steering gear, is transmitted into a steering rocker arm, is transmitted to a steering knuckle and a steering knuckle arm on the steering knuckle through a steering drag link, and is transmitted into a wheel hub finally to deflect wheels.

Two connecting holes are required to be processed in the process of processing the knuckle arm to respectively connect the tie rod and the knuckle, a U-shaped knuckle arm exists in the market at present, the two connecting holes of the U-shaped knuckle arm are positioned on two different support arms, the processing of the two connecting holes in the prior art generally adopts a plurality of sets of different clamps to carry out clamping for a plurality of times and then adopts a plurality of procedures to respectively process, the accumulated error of the processing size is larger due to the clamping for a plurality of times, so the size of the workpiece in the same batch is unstable, in addition, the workpiece of the U-shaped knuckle arm is irregular in shape, the blank is easy to deform after heat treatment, the fall of the upper end surface and the lower end surface of the two connecting holes and the wall thickness of the two connecting holes are considered when a product is processed, the phenomenon of uneven wall thickness of the connecting holes and the phenomenon of black skin of the upper end surface and the lower end surface of the connecting holes are often caused by the clamping for a plurality of times, resulting in product scrap.

SUMMERY OF THE UTILITY MODEL

Based on the above description, the utility model provides a punching positioning fixture for a knuckle arm, so as to solve the technical problem that in the prior art, multiple clamping of multiple sets of fixtures is required for punching a connecting hole of a U-shaped knuckle arm, so that the size is unstable and even the product is scrapped.

The technical scheme for solving the technical problems is as follows:

a punching positioning clamp of a knuckle arm is used for positioning and clamping a knuckle arm blank and comprises a bottom plate, a first end positioning assembly, a second end positioning assembly and a middle positioning assembly;

the upper end of the bottom plate is provided with a straight mounting surface, and the first end positioning assembly and the second end positioning assembly are mounted in parallel on the front part of the straight mounting surface;

the first end positioning assembly comprises a V-shaped positioning block and a first pressing piece, a V-shaped groove is formed at the upper end of the V-shaped positioning block, and the first pressing piece is arranged above the V-shaped groove and used for pressing the first end of the knuckle arm blank placed in the V-shaped groove;

the second end positioning assembly comprises an end supporting piece and two opposite positioning clamping pieces, the two positioning clamping pieces are arranged on the same side of the V-shaped positioning block at intervals from left to right and used for clamping the second end of the knuckle arm blank, a position avoiding groove is formed in the position, corresponding to the position between the two positioning clamping pieces, of the bottom plate, the end supporting piece is installed on the bottom plate, and the upper end of the end supporting piece is used for supporting the knuckle arm blank;

the middle positioning assembly is arranged at the rear part of the straight mounting surface and comprises a middle supporting piece and a second pressing piece, the middle supporting piece is arranged at the middle part of the steering knuckle arm blank, which is supported by the bottom plate and the upper end of the bottom plate, and the second pressing piece is arranged above the middle supporting piece and used for pressing the middle part of the steering knuckle arm blank from the upper part.

Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:

the punching positioning fixture provided by the application can clamp the first end of a knuckle arm blank through the matching of a V-shaped positioning block and a first pressing piece, can position one end of the knuckle arm blank, which is provided with a taper shaft, by adopting a three-point positioning mode, and can clamp the second end of the knuckle arm blank through the matching of an end supporting piece and two oppositely arranged positioning clamping pieces, and leaves a corresponding spacing groove on a bottom plate, so that the fixing of the two ends of the knuckle arm blank is realized, then the middle part of the knuckle arm blank is fixed through the matching of a middle supporting piece and a second pressing piece, so that the integral fixing of the knuckle arm blank is realized, meanwhile, the punching positioning fixture can not generate interference on the punching of two connecting holes and the processing of hole end surfaces, so that one-time clamping is adopted, the punching of a central hole shaft end and two connecting holes and the processing of the upper and lower end surfaces can be realized, and good dimensional accuracy is ensured, accumulation of dimensional errors is avoided.

On the basis of the technical scheme, the utility model can be further improved as follows.

Furthermore, the second end positioning assembly further comprises a third pressing piece, and the third pressing piece is arranged above the end supporting piece and used for being matched with the end supporting piece to press the knuckle arm blank.

Further, the anti-shifting device comprises an anti-shifting assembly, wherein the anti-shifting assembly comprises at least two auxiliary supporting pieces which are arranged on the straight mounting surface and used for supporting the outer side of the knuckle arm blank.

Furthermore, one of the auxiliary supporting pieces is arranged at the rear end of the straight mounting surface and used for supporting the rear end of the outer side surface of the knuckle arm blank, and the other auxiliary supporting piece is arranged between the first end positioning assembly and the middle positioning assembly and corresponds to the position, to be punched, of the knuckle arm blank.

Furthermore, the first compressing part comprises two first upright columns and a first pressing block, the two first upright columns are respectively vertically arranged on two sides of the V-shaped positioning block, two ends of the first pressing block are respectively slidably sleeved on the two first upright columns, and a first nut located above the first pressing block is arranged on each first upright column.

Furthermore, the second compressing part comprises a second upright post and an L-shaped pressing block, the second upright post is vertically installed on the straight installation surface, the vertical section of the L-shaped pressing block is parallel to the second upright post, the horizontal section of the L-shaped pressing block is slidably sleeved on the second upright post, and a second nut located above the horizontal section is installed on the second upright post.

Furthermore, the third compressing part comprises two third upright columns and a third pressing block, the two third upright columns are vertically arranged on the straight installation surface, two ends of the third pressing block are respectively sleeved on the two third upright columns in a sliding mode, and a third nut located above the third pressing block is arranged on each third upright column.

Furthermore, cushion blocks are arranged on two side walls of the V-shaped groove.

Further, the end supporting pieces and the middle supporting piece are supporting screws which penetrate through the bottom plate from the lower end of the bottom plate.

Furthermore, the installation structure also comprises an auxiliary positioning plate which is vertically connected to the lower end of the bottom plate, and the auxiliary positioning plate is provided with an auxiliary positioning surface which is perpendicular to the straight installation surface.

Drawings

Fig. 1 is a schematic perspective view of a drilling positioning fixture for a knuckle arm according to an embodiment of the present invention;

FIG. 2 is a schematic top view of the device of FIG. 1 in use;

FIG. 3 is a schematic view of the front side of FIG. 1 from another perspective;

fig. 4 is a structural diagram of a rear view angle of fig. 1.

In the drawings, the components represented by the respective reference numerals are listed below:

1. a base plate; 2. a first end positioning assembly; 3. a second end positioning assembly; 4. a middle positioning assembly; 5. a tamper-resistant component; 11. a flat mounting surface; 12. a position avoiding groove; 13. an auxiliary positioning plate; 21. a V-shaped positioning block; 22. a first pressing member; 211. a V-shaped groove; 20. a knuckle arm blank; 221. a first upright post; 222. a first pressing block; 223. a first nut; 212. cushion blocks; 31. an end support; 32. positioning the clamping piece; 33. a third pressing member; 321. positioning blocks; 322. a set screw; 331. a third column; 332. a third pressing block; 333. a third nut; 41. a middle support; 42. a second pressing member; 421. a second upright post; 422. an L-shaped pressing block; 423. a second nut; 51. an auxiliary support; 131. and (5) auxiliary positioning surfaces.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application 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.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

It will be understood that spatial relationship terms, such as "under", "below", "beneath", "below", "over", "above", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary terms "under" and "under" can encompass both an orientation of above and below. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations) and the spatial descriptors used herein interpreted accordingly.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. The "connection" in the following embodiments is understood as "electrical connection", "communication connection", or the like if the connected circuits, modules, units, or the like have electrical signals or data transmission therebetween.

As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

As shown in fig. 1 to 4, the embodiment of the present application provides a drilling positioning fixture for a knuckle arm, which is used for positioning and clamping a knuckle arm blank 20, and comprises a base plate 1, a first end positioning assembly 2, a second end positioning assembly 3, a middle positioning assembly 4 and a tamper-proof assembly 5.

It should be noted that the knuckle arm blank 20 referred to in this application is a U-shaped knuckle arm blank workpiece, wherein one end thereof has a cylindrical shaft, referred to as a first end; the other end is used for punching a connecting hole and is called as a second end.

Wherein, the upper end of the bottom plate 1 is provided with a flat mounting surface 11, and the flat mounting surface 11 is used as a positioning surface of the whole clamp.

The first end positioning component 2 and the second end positioning component 3 are mounted in parallel on the front portion of the straight mounting surface 11, and the extending directions of the two ends of the knuckle arm blank 20 are defined as the front direction in the application.

Specifically, the first end positioning assembly 2 includes a V-shaped positioning block 21 and a first pressing member 22, a V-shaped groove 211 is formed at an upper end of the V-shaped positioning block 21, the first pressing member 22 is disposed above the V-shaped groove 211 and is configured to press a first end of the knuckle arm blank 20 placed in the V-shaped groove 211, and a three-point positioning manner is adopted to position an end of the knuckle arm blank 20 having a taper shaft.

The first pressing member 22 includes two first vertical columns 221 and a first pressing block 222, the two first vertical columns 221 are respectively vertically installed on two sides of the V-shaped positioning block 21, two ends of the first pressing block 222 are respectively slidably sleeved on the two first vertical columns 221, and a first nut 223 located above the first pressing block 222 is installed on each first vertical column 221; by adopting the arrangement of the two upright columns 221 and the first pressing block 222, the first pressing block 222 can ensure the effective compression of the first end of the knuckle arm blank 20.

More preferably, spacers 212 are mounted on both sidewalls of the V-shaped groove 211.

In this embodiment, the second end positioning assembly 3 includes an end support 31 and two positioning clamps 32 disposed opposite to each other, and the two positioning clamps 32 are spaced left and right and arranged on the same side of the V-shaped positioning block 21, and are configured to clamp the second end of the knuckle arm blank 20; the bottom plate 1 is provided with a clearance groove 12 corresponding to a position between the two positioning clamping pieces 32, and it can be understood that a clearance hole is correspondingly formed on the bottom plate 1 at the position where the connecting hole needs to be processed. The end support 31 is mounted to the base plate 1 and has an upper end for supporting the knuckle arm blank 20, and more specifically, the end support 31 supports a position at which the second end of the knuckle arm blank 20 is close to the rear side.

Preferably, the positioning clamp 32 includes positioning blocks 321 and positioning screws 322, the positioning blocks 321 are correspondingly installed at one side of the avoiding groove 12, and the positioning screws 322 extend from the outer sides of the positioning blocks 321 into the second ends of the knuckle arm blanks 20 located at the inner sides of the two positioning blocks 321.

For a better fixation of the second end, the second end positioning assembly 3 further comprises a third pressing member 33, the third pressing member 33 being arranged above the end support 31 for pressing the knuckle arm blank 20 in cooperation with the end support 31.

Preferably, similar to the first pressing member 22, the third pressing member 33 includes two third vertical columns 331 and a third pressing block 332, the two third vertical columns 331 are vertically installed on the flat installation surface 11, two ends of the third pressing block 332 are slidably sleeved on the two third vertical columns 331 respectively, and a third nut 333 located above the third pressing block 332 is installed on each third vertical column 331.

The second end of the knuckle arm blank 20 is clamped in a matched manner by the end support 31, the two oppositely arranged positioning clamping pieces 32 and the third pressing piece 33, and the corresponding avoiding groove 12 is reserved on the bottom plate 1, so that the second end of the knuckle arm blank 20 is fixed.

In this embodiment, the middle positioning assembly 4 is mounted at the rear of the flat mounting surface 11, and includes a middle supporting member 41 and a second pressing member 42, the middle supporting member 41 is mounted on the bottom plate 1, and the upper end of the middle supporting member is used for supporting the middle of the knuckle arm blank 20, the second pressing member 42 is disposed above the middle supporting member 41, and a corresponding clearance hole is reserved on the bottom plate 1 for pressing the middle of the knuckle arm blank 20 from above.

Specifically, the second pressing member 42 includes a second upright column 421 and an L-shaped pressing block 422, the second upright column 421 is vertically installed on the straight installation surface 11, a vertical section of the L-shaped pressing block 422 is parallel to the second upright column 421, a horizontal section of the L-shaped pressing block 422 is slidably sleeved on the second upright column 421, and a second nut 423 located above the horizontal section is installed on the second upright column 421.

In the preferred embodiment of the present application, the end supporting members 31 and the middle supporting member 41 are supporting screws passing through the bottom plate 1 from the lower end of the bottom plate 1, and the heights of the corresponding upper end surfaces can be adjusted by rotating the supporting screws, and during processing, the upper and lower end surfaces of the end supporting members 31 and the middle supporting member 41 to the two connecting holes should be generally adjusted to be parallel to the straight mounting surface 11.

The tamper-proof assembly 5 includes at least two auxiliary supports 51 mounted on the flat mounting surface 11 for supporting the outer side of the knuckle arm blank 20.

Preferably, one of the auxiliary supporting members 51 is disposed at the rear end of the flat mounting surface 11 for supporting the rear end position of the outer side surface of the knuckle arm blank 20, and the other auxiliary supporting member 51 is disposed between the first end positioning assembly 2 and the middle positioning assembly 4 and corresponding to a position to be punched in the middle of the knuckle arm blank 20.

The anti-shifting assembly 5 can effectively prevent the knuckle arm blank 20 from shifting back and forth in the machining and punching process.

More preferably, the punching positioning fixture further comprises an auxiliary positioning plate 13, wherein the auxiliary positioning plate 13 is vertically connected to the lower end of the bottom plate 1, and the auxiliary positioning plate 13 has an auxiliary positioning surface 131 vertically arranged with respect to the flat mounting surface 11.

Through the matching of the straight mounting surface 11 and the auxiliary positioning surface 131, the central axis of the cylindrical shaft at the first end of the knuckle arm blank 20 can be parallel to the straight mounting surface 11 and the auxiliary positioning surface 131 at the same time, and further the machining precision of the subsequent process is ensured.

After the steering knuckle arm blank 20 is fixed and positioned by the punching positioning fixture, the punching of the two connecting holes and the processing of the two end faces of the holes cannot be interfered, and the punching of the shaft end central hole and the two connecting holes and the processing of the upper end face and the lower end face are realized by one-time clamping, so that good dimensional precision is ensured, and the accumulation of dimensional errors is avoided.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A punching positioning clamp of a knuckle arm is used for positioning and clamping a knuckle arm blank and is characterized by comprising a bottom plate, a first end positioning assembly, a second end positioning assembly and a middle positioning assembly;

2. The track arm punch-positioning fixture of claim 1 wherein the second end positioning assembly further includes a third hold-down member disposed above the end support member for cooperating with the end support member to hold down the track arm blank.

3. The track arm punch setting fixture of claim 1 further including a tamper assembly including at least two secondary supports mounted on the flat mounting surface for supporting the outboard side of the track arm blank.

4. The drilling positioning fixture for the knuckle arm as claimed in claim 3, wherein one of the auxiliary supporting members is disposed at a rear end of the flat mounting surface for supporting a rear end position of an outer side surface of the knuckle arm blank, and the other of the auxiliary supporting members is disposed between the first end positioning member and the middle positioning member and corresponds to a position to be drilled of the knuckle arm blank.

5. The drilling positioning fixture for the knuckle arm according to claim 1, wherein the first pressing member comprises two first vertical posts and a first pressing block, the two first vertical posts are vertically mounted on two sides of the V-shaped positioning block respectively, two ends of the first pressing block are slidably sleeved on the two first vertical posts respectively, and a first nut is mounted on each first vertical post and located above the first pressing block.

6. The punching positioning fixture for the knuckle arm according to claim 1, wherein the second pressing member comprises a second upright post and an L-shaped pressing block, the second upright post is vertically mounted on the flat mounting surface, a vertical section of the L-shaped pressing block is parallel to the second upright post, a horizontal section of the L-shaped pressing block is slidably sleeved on the second upright post, and a second nut located above the horizontal section is mounted on the second upright post.

7. The drilling positioning fixture for the knuckle arm according to claim 2, wherein the third pressing member comprises two third vertical posts and a third pressing block, the two third vertical posts are vertically mounted on the flat mounting surface, two ends of the third pressing block are slidably sleeved on the two third vertical posts respectively, and a third nut located above the third pressing block is mounted on each third vertical post.

8. The track arm punch setting fixture of claim 1 wherein spacers are mounted to both sidewalls of the V-shaped groove.

9. The track arm punch setting fixture of claim 1 wherein the end support and the middle support are each support screws that pass through the bottom plate from a lower end thereof.

10. The perforating positioning fixture of a knuckle arm as claimed in claim 1, further comprising an auxiliary positioning plate vertically connected to a lower end of the base plate, the auxiliary positioning plate having an auxiliary positioning surface disposed perpendicular to the flat mounting surface.