CN115570413A

CN115570413A - Positioning fixture of knuckle arm

Info

Publication number: CN115570413A
Application number: CN202211297022.XA
Authority: CN
Inventors: 张运军; 肖烈; 王战兵; 汪拥进; 张宏涛; 席小龙; 甘龙; 李奎富; 张得飞; 刘佳
Original assignee: Hubei Tri Ring Forging Co Ltd
Current assignee: Hubei Tri Ring Forging Co Ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-01-06

Abstract

The invention discloses a positioning fixture of a steering knuckle arm, relating to the technical field of processing tools, and the device comprises: the positioning base is provided with at least two positioning chutes in a group mode, an XOY rectangular coordinate system is defined by a plane where the positioning base is located, and the two positioning chutes are arranged along the X direction and the Y direction respectively; the two positioning pin devices are respectively arranged in the two positioning chutes and can move in the corresponding positioning chutes so as to adjust the distance and the direction of the positioning points of the two positioning pin devices. The position of locating clip among this application scheme can visual regulation locating pin, and compromise the different centre-to-centre spacing in the location straight hole of various knuckle arms, promote the commonality and the repacking time of anchor clamps greatly, reduce the input cost of anchor clamps.

Description

Positioning fixture of knuckle arm

Technical Field

The invention relates to the technical field of machining tools, in particular to a positioning clamp of a steering knuckle arm.

Background

The clamp is a technological device used for quickly fastening a workpiece during processing so as to keep a machine tool, a cutter and the workpiece at correct relative positions. The clamp is an indispensable part for machining, and is driven by the development of the machine tool technology in the directions of high speed, high efficiency, precision, composition, intelligence and environmental protection, the clamp technology is developing in the directions of high precision, high efficiency, module, combination, universality and economy. When machining a workpiece on a machine tool, a jig must be used in order to achieve the dimensions, geometry and mutual positional accuracy with other surfaces of the workpiece as specified in the drawing.

In the related art, the center distance of the positioning pin of the drilling and milling clamp is integrally manufactured according to the center distance of the straight hole of the product, so that the clamp cannot be universal, and the input amount of the product clamp is increased. The automobile steering knuckle arms are various in types, and the center distances of a plurality of straight holes of different types of steering knuckle arms are different. Meanwhile, the positioning pin needs to be in clearance fit with the assembly size of the straight hole, and errors are generated in the clearance fit process, so that unstable clamping is caused. Therefore, providing a universal clamp for a knuckle arm is a difficult problem that practitioners are demanding to solve.

Disclosure of Invention

The positioning fixture to the straight hole of knuckle arm among the prior art to the relatively poor problem of not unidimensional knuckle arm adaptability, this application provides a positioning fixture of knuckle arm, includes:

the positioning base is provided with at least two positioning chutes in a group mode, an XOY rectangular coordinate system is defined by a plane where the positioning base is located, and the two positioning chutes are arranged along the X direction and the Y direction respectively;

the two positioning pin devices are respectively arranged in the two positioning chutes and can move in the corresponding positioning chutes so as to adjust the distance and the direction of the positioning points of the two positioning pin devices.

In some embodiments, the dowel pin means is adapted to be a clearance fit with the knuckle arm, and the cross-sectional area of the portion of the dowel pin means that engages the knuckle arm is adjustable.

In some embodiments, the dowel assembly comprises:

the driving assembly is arranged in the positioning sliding groove;

and the positioning pin block is connected with the driving assembly, and the driving assembly is used for driving the positioning pin block to be close to or far away from the knuckle arm.

In some embodiments, a positioning column is disposed on the positioning pin block, and a positioning head having a funnel-shaped structure is disposed at one end of the positioning column away from the positioning chute.

In some embodiments, a positioning column is arranged on the positioning pin block, and a positioning head of the positioning column is in a conical structure.

In some embodiments, the drive assembly comprises:

the driving screw rod is assembled in the positioning sliding groove and connected with the positioning pin block, and the driving screw rod is used for rotating to drive the positioning pin block to move along the positioning sliding groove;

and the locking nut is connected with the driving screw rod and used for locking the driving screw rod.

In some embodiments, the positioning chute is provided with a size scale.

In some embodiments, a positioning sliding seat is disposed on the positioning base, a sliding channel is disposed on the positioning sliding seat to mount the positioning sliding groove, and the positioning sliding seat can slide on the positioning base.

In some embodiments, the two positioning sliding grooves are connected to form an integral structure on the positioning sliding seat.

In some embodiments, the positioning fixture further comprises: and the pressing and holding device is assembled on the positioning base and is used for pressing the steering knuckle arm.

Compared with the prior art, the invention has the advantages that:

the position of locating clip among this application scheme can visual regulation locating pin, and compromise the different centre-to-centre spacing in the location straight hole of various knuckle arms, promote the commonality and the repacking time of anchor clamps greatly, reduce the input cost of anchor clamps. Meanwhile, the positioning pin adopts a diameter variable structure of the linkage pressing device, the diameter variable structure can be self-adapted to the diameter of a straight hole of a workpiece during clamping, the product is fixed, meanwhile, the positioning pin is in precise fit with the product to the maximum extent, and machining errors caused by assembly are reduced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of a positioning fixture according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a second perspective of the positioning fixture according to the embodiment of the present invention;

fig. 3 is an exploded view of a locating pin block of a locating jig according to an embodiment of the present invention.

In the figure: 1. positioning the chute; 11. dimension calibration; 2. a locating pin device; 21. a drive assembly; 211. driving a lead screw; 212. locking the nut; 22. positioning the pin block; 221. a positioning column; 222. positioning the head; 223. a vibration damping telescopic mechanism; 224. a gasket; 3. a knuckle arm; 4. a positioning base; 5. a positioning slide seat; 6. and a pressing and holding device.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. 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 application.

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. The positioning clamp aims at the problem that the positioning clamp for the straight hole of the knuckle arm in the related art is poor in adaptability to knuckle arms of different sizes. As shown in fig. 1, the present application provides a positioning jig for a knuckle arm, including: a positioning base 4 and at least two positioning pin devices 2; wherein,

the positioning device comprises a positioning base 4, wherein at least two positioning chutes 1 are arranged on the positioning base 4 in a group mode, an XOY rectangular coordinate system is defined by a plane where the positioning base 4 is located, and the two positioning chutes 1 are arranged along the X direction and the Y direction respectively; the positioning pin devices 2 are respectively arranged in the two positioning chutes 1, and the two positioning pin devices 2 can move in the corresponding positioning chutes 1 to adjust the distance and the orientation of the positioning points of the two positioning pin devices 2.

It is worth mentioning that in the present application, the straight hole is adapted to different positions of different types of said knuckle arm 3 by being movable along the positioning runner 1.

Further, the dowel pin device 2 needs to be in clearance fit with the assembling size of the knuckle arm 3, but the dowel pin device and the knuckle arm are easy to generate errors during clearance fit, so that clamping failure is caused. In this application, locating pin device 2 is used for with 3 clearance fit of knuckle arm, just locating pin device 2 be used for with 3 cooperation parts's of knuckle arm sectional area size is adjustable.

Specifically, the positioning pin device 2 includes: a drive assembly 21 and a dowel block 22; wherein,

a drive assembly 21 disposed in the positioning chute 1; a dowel block 22 connected to the drive assembly 21, the drive assembly 21 being adapted to drive the dowel block 22 towards and away from the track arm 3. The dowel block 22 includes: a positioning column 221, wherein a positioning head 222 with a funnel-shaped structure is arranged at one end of the positioning column 221 away from the positioning chute 1.

Preferably, the positioning head 222 of the positioning post 221 is tapered so that the cross-sectional area of the positioning pin block 22 that fits into the straight hole of the knuckle arm 3 can be adjusted by raising and lowering the positioning pin block in the vertical direction.

Furthermore, as shown in fig. 3, in order to prevent the positioning column 221 from falling off during operation or being positioned inaccurately due to vibration, a vibration damping telescopic mechanism 223 is provided inside the positioning pin block 22, and a gasket 224 is detachably provided on the upper end surface of the positioning pin block 22. In addition to driving positioning column 221 to move up and down in the direction perpendicular to positioning base 4, vibration damping telescopic mechanism 223 also damps vibration of positioning column 221 through an elastic member on vibration damping telescopic mechanism 223. While the inside of the spacer 224 is provided with a step structure for clamping the positioning post 221, only one positioning head 222 for extending or retracting the positioning post 221 is provided to the spacer 224. And because the gasket 224 is detachable and convenient to replace, the gasket 224 can be directly replaced after being worn, and the whole positioning pin block 22 does not need to be replaced integrally.

In some specific embodiments, as shown in fig. 2, the driving assembly 21 includes: a drive screw 211 and a lock nut 212; wherein,

the driving screw 211 is assembled in the positioning chute 1, the driving screw 211 is connected with the positioning pin block 22, and the driving screw 211 is used for rotating to drive the positioning pin block 22 to move along the positioning chute 1; and the locking nut 212 is connected with the driving lead screw 211, and the locking nut 212 is used for locking the driving lead screw 211. The positioning sliding groove 1 is provided with size scales 11 so as to facilitate adjustment of an operator.

Preferably, as shown in fig. 1, a positioning sliding seat 5 is arranged on the positioning base 4, a sliding way is arranged on the positioning sliding seat 5 to mount the positioning sliding groove 1, and the positioning sliding seat 5 can slide on the positioning base 4. So set up for locating pin device 2 that is arranged in location spout 1 in this application can more nimble adjustment position.

In some embodiments, for convenience of manufacturing process, the two positioning sliding grooves 1 are connected to the positioning sliding base 5 to form an integral T-shaped groove structure, the two positioning pin blocks 22 are adjusted by driving the lead screw 211 to slide along the X direction or the Y direction, and after the adjustment is completed, the two positioning pin blocks are locked and fixed by the locking nut 212.

Furthermore, the positioning base 4 is further provided with at least one pressing device 6, and the pressing device 6 is used for pressing and fixing the steering knuckle arm 3 after the steering knuckle arm is positioned and aligned.

To sum up, the position of locating pin can visual regulation to positioning fixture in this application scheme, and compromise the different centre-to-centre spacing in the straight hole of location of various knuckle arms, promotes the commonality and the time of reloading of anchor clamps greatly, reduces the input cost of anchor clamps. Meanwhile, the positioning pin adopts a diameter variable structure of the linkage pressing device, the diameter variable structure can be self-adapted to the diameter of a straight hole of a workpiece during clamping, the product is fixed, the precision matching with the product is greatly limited, and the machining error caused by assembly is reduced.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly and encompass, for example, both fixed and removable coupling as well as integral coupling; 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.

It is noted that, in this application, relational terms such as "first" and "second," and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A positioning jig for a knuckle arm, comprising:

the positioning device comprises a positioning base (4), wherein at least two positioning sliding chutes (1) are formed in the positioning base (4) in a group mode, an XOY rectangular coordinate system is defined by a plane where the positioning base (4) is located, and the two positioning sliding chutes (1) are arranged along the X direction and the Y direction respectively;

the positioning pin device comprises at least two positioning pin devices (2), wherein the two positioning pin devices (2) are respectively arranged in the two positioning chutes (1), and the two positioning pin devices (2) can move in the corresponding positioning chutes (1) so as to adjust the distance and the direction of positioning points of the two positioning pin devices (2).

2. The positioning jig according to claim 1, characterized in that the dowel pin means (2) is adapted to be clearance-fitted with the knuckle arm (3), and the cross-sectional area of the portion of the dowel pin means (2) adapted to be fitted with the knuckle arm (3) is adjustable in size.

3. The positioning jig according to claim 2, characterized in that the positioning pin device (2) comprises:

a drive assembly (21) arranged in the positioning chute (1);

a dowel block (22) connected to the drive assembly (21), the drive assembly (21) being adapted to drive the dowel block (22) towards or away from the track arm (3).

4. The positioning fixture according to claim 3, wherein a positioning column (221) is disposed on the positioning pin block (22), and a positioning head (222) having a funnel-shaped structure is disposed at an end of the positioning column (221) away from the positioning chute (1).

5. The positioning fixture according to claim 3, wherein a positioning column (221) is disposed on the positioning pin block (22), and a tapered positioning head (222) is disposed at an end of the positioning column (221) away from the positioning chute (1).

6. The positioning clamp according to claim 3, characterized in that said drive assembly (21) comprises:

the driving lead screw (211) is assembled in the positioning sliding groove (1), the driving lead screw (211) is connected with the positioning pin block (22), and the driving lead screw (211) is used for rotating to drive the positioning pin block (22) to move along the positioning sliding groove (1);

and the locking nut (212) is connected with the driving screw rod (211), and the locking nut (212) is used for locking the driving screw rod (211).

7. The positioning clamp according to claim 1, characterized in that the positioning chute (1) is provided with a size scale (11).

8. Positioning fixture according to claim 1, characterized in that a positioning slide (5) is provided on the positioning base (4), that a slide is provided on the positioning slide (5) for mounting the positioning chute (1), and that the positioning slide (5) is slidable on the positioning base (4).

9. The positioning clamp according to claim 8, characterized in that the two positioning runners (1) are connected in one piece on the positioning slide (5).

10. The positioning jig of claim 8, further comprising: and the pressing and holding device (6) is assembled on the positioning base (4), and the pressing and holding device (6) is used for pressing the steering knuckle arm (3).