Clamp for forklift cantilever machining

Abstract

The fixture comprises the forklift cantilever and a base, the forklift cantilever comprises a crank arm, a cylindrical part and a [-shaped part, the cylindrical part and the [-shaped part are correspondingly and integrally connected to the two ends of the crank arm respectively, and a circular cover part is integrally connected to the outer wall of the end, close to the [-shaped part, of one side of the crank arm. The base is fixedly connected with two vertical plates which are arranged face to face in parallel, and a first positioning assembly, a second positioning assembly and a third positioning assembly are sequentially fixed to each vertical plate from bottom to top and are correspondingly used for supporting and positioning the cylindrical part, the positioning crank arm and the positioning circular cover part respectively. According to the structure characteristics of the forklift cantilevers, two forklift cantilevers can be clamped at a time, the forklift cantilevers can be machined at a time through one-time clamping and one-time positioning, repeated clamping is not needed, and on the basis that the machining precision and the machining size consistency can be guaranteed, the machining efficiency is improved, and the machining period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of forklift cantilever processing, and specifically relates to a fixture for forklift cantilever processing. Background Technique

[0002] As a component in the forklift steering system, the forklift cantilever has a relatively complex structure and high spatial dimension requirements. As Figure 3 、 4 shown, the forklift cantilever mainly includes a curved arm 101, a cylindrical part 102 and a C-shaped part 103 which are integrally connected to both ends of the curved arm 101 respectively. On one side of the curved arm 101, a circular cover part 104 is integrally connected to the outer wall near one end of the C-shaped part 103. After being cast and formed, boring processing is carried out on a machining center to machine holes A and B.

[0003] From the above content and Figure 3 、 4 it can be known that since the forklift cantilever is a special-shaped structure, and the central line of hole A and the central line of hole B form an angle of about 94.59° in space. Therefore, it is often necessary to clamp the forklift cantilever at least twice to machine holes A and B respectively. However, each clamping requires positioning of the forklift cantilever once. Such repeated clamping will cause a large positioning error, poor accuracy, low processing efficiency, and increase the production cycle. Content of the Utility Model

[0004] The purpose of the utility model is to overcome the defects and deficiencies existing in the prior art, and provide a fixture for forklift cantilever processing, which can clamp two forklift cantilevers at one time, and can carry out one-step processing on the forklift cantilever through one-time clamping and one-time positioning, without repeated clamping. On the basis of ensuring the machining accuracy and the consistency of machining dimensions, the processing efficiency is improved and the processing cycle is shortened.

[0005] To achieve the above purpose, the utility model provides the following technical solution:

[0006] A fixture for forklift cantilever processing includes a forklift cantilever and a base. The forklift cantilever includes a curved arm, a cylindrical part and a C-shaped part which are integrally connected to both ends of the curved arm respectively. A circular cover part is integrally connected to the outer wall of one side of the curved arm near one end of the C-shaped part. It is characterized in that: two vertical plates are fixedly connected to the base and are arranged parallel to each other face to face. On each vertical plate, a first positioning component, a second positioning component and a third positioning component are fixedly arranged from bottom to top, which are respectively used to support and position the cylindrical part, position the curved arm and position the circular cover part.

[0007] ​Furthermore, the first positioning assembly includes a first L-shaped positioning member, two first positioning cross bars and two limiting cross bars. The vertical portion of the first L-shaped positioning member is arranged vertically upward, and the two first positioning cross bars and the two limiting cross bars are respectively located on both sides of the first L-shaped positioning member, and are respectively fixedly connected to the bottom of the vertical plate. The upper outer circular surfaces of the two first positioning cross bars are respectively abutted against the lower outer circular surface of the cylindrical member, so as to support and position the cylindrical member from the bottom; the end faces of the two limiting cross bars and the inner side faces of the vertical portion of the first L-shaped positioning member are respectively abutted against the outer circular surfaces on both sides of the cylindrical member, so as to position the cylindrical member from both sides.

[0008] Furthermore, the inner side surface of the vertical portion of the first L-shaped positioning member is an arc-shaped concave surface at the position in contact with the cylindrical member.

[0009] Furthermore, the bottom of each vertical plate is fixedly connected to a first cross bar, and the vertical portion of the first L-shaped positioning member is damped and slidably mounted on the corresponding first cross bar.

[0010] Furthermore, the second positioning assembly includes a second positioning cross bar, a fixing seat and a positioning screw, the second positioning cross bar is fixedly connected to the upper part of the vertical plate, the outer circular surface of the second positioning cross bar abuts against the upper part of the outer curved surface of the curved arm, and is used to position the curved arm from one side; the fixing seat is fixedly connected to the lower part of the vertical plate, and a screw hole is provided on the fixing seat, the front end of the positioning screw is screwed into the screw hole and extends out, and abuts against the lower part of the inner curved surface of the curved arm, and is used to position the curved arm from the other side.

[0011] Furthermore, the third positioning assembly includes a second L-shaped positioning member, the transverse portion of which is inclined downward along the radial direction of the circular cover, and the inner side surface of the transverse portion of the second L-shaped positioning member abuts against the edge of the circular cover for positioning the circular cover.

[0012] Furthermore, the top of each vertical plate is fixedly connected to a second cross bar, and the transverse part of the second L-shaped positioning member is damped and slidably installed on the corresponding second cross bar.

[0013] Furthermore, connecting upright plates are fixedly connected between the two sides of the two upright plates respectively, and the bottom ends of the connecting upright plates are fixedly connected to the base.

[0014] Furthermore, the base is provided with an assembly hole for fixedly mounting on a turntable of a machining center.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] In view of the structural characteristics of the forklift cantilever, the utility model can clamp two forklift cantilevers at one time, and can carry out the first-order processing of the forklift cantilever (that is, process hole A and hole B in the first order) through one clamping and one positioning, without repeated clamping. On the basis of ensuring the machining accuracy and the consistency of machining dimensions, the machining efficiency is improved and the machining cycle is shortened. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic structural diagram of the utility model.

[0018] Figure 2 It is the front view of the structure of the utility model.

[0019] Figure 3 It is a schematic structural diagram of the forklift cantilever in the utility model.

[0020] Figure 4 It is the front view of the structure of the forklift cantilever in the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] See Figure 1-4 , a fixture for machining a forklift cantilever, which includes a forklift cantilever 1 and a base 2. The forklift cantilever 1 includes a curved arm 101 and a cylindrical part 102 and a C-shaped part 103 respectively integrally connected to both ends of the curved arm 101. On one side of the curved arm 101, a circular cover part 104 is integrally connected to the outer wall near one end of the C-shaped part 103. Two vertical plates 3 are fixedly connected to the base 2 and arranged in parallel face to face. On each vertical plate 3, a first positioning component 4, a second positioning component 5 and a third positioning component 6 are fixedly arranged in sequence from bottom to top, which are respectively used to support and position the cylindrical part 102, position the curved arm 101 and position the circular cover part 104.

[0023] In the utility model, the first positioning assembly 4 includes a first L-shaped positioning member 41, two first positioning cross bars 42 and two limiting cross bars 43. The vertical portion of the first L-shaped positioning member 41 is vertically arranged upward, and the two first positioning cross bars 42 and the two limiting cross bars 43 are respectively located on both sides of the first L-shaped positioning member 41, and are respectively fixedly connected to the bottom of the vertical plate 3. The upper outer cylindrical surfaces of the two first positioning cross bars 42 are respectively abutted against the lower outer cylindrical surfaces of the cylindrical member 102, which are used to support and position the cylindrical member 102 from the bottom; the end faces of the two limiting cross bars 43 and the inner side faces of the vertical portion of the first L-shaped positioning member 41 are respectively abutted against the outer cylindrical surfaces on both sides of the cylindrical member 102, which are used to position the cylindrical member 102 from both sides.

[0024] Therefore, the cylindrical member 102 is supported and positioned by the two first positioning cross bars 42 , and the cylindrical member 102 is positioned by the two limiting cross bars 43 and the first L-shaped positioning member 41 , so that the cylindrical member 102 is supported and positioned.

[0025] In the present invention, the inner side surface of the vertical portion of the first L-shaped positioning member 41 is an arc-shaped concave surface at the position in contact with the cylindrical member 102, which is matched with the outer cylindrical surface of the cylindrical member 102, so as to achieve a better positioning effect.

[0026] In the present invention, the bottom of each vertical plate 3 is fixedly connected to a first cross bar 7 , and the vertical portion of the first L-shaped positioning member 41 is damped and slidably mounted on the corresponding first cross bar 7 .

[0027] Therefore, by moving the first L-shaped positioning member 41 inward along the first cross bar 7, the end faces of the two limiting cross bars 43 and the inner side faces of the vertical portion of the first L-shaped positioning member 41 are respectively abutted against the outer circular surfaces on both sides of the cylindrical member 102, thereby positioning the cylindrical member 102; by moving the first L-shaped positioning member 41 outward along the first cross bar 7, the positioning of the cylindrical member 102 can be released after the processing is completed.

[0028] In the utility model, the second positioning assembly 5 includes a second positioning cross bar 51, a fixing seat 52 and a positioning screw 53. The second positioning cross bar 51 is fixedly connected to the upper part of the vertical plate 3, and the outer circular surface of the second positioning cross bar 51 abuts against the upper part of the outer curved surface of the curved arm 101, which is used to position the curved arm 101 from one side; the fixing seat 52 is fixedly connected to the lower part of the vertical plate 3, and a screw hole is provided on the fixing seat 52. The front end of the positioning screw 53 is screwed into the screw hole and extends out, and abuts against the lower part of the inner curved surface of the curved arm 101, which is used to position the curved arm 101 from the other side.

[0029] Thus, one side of the crank arm 101 is positioned by the second positioning cross bar 51 , and the other side of the crank arm 101 is positioned by the positioning screw 53 , thereby achieving the positioning of the cylindrical crank arm 101 .

[0030] In the utility model, the third positioning assembly 6 includes a second L-shaped positioning member, the transverse portion of the second L-shaped positioning member 6 is arranged to be inclined downward along the radial direction of the circular cover 104, and the inner side surface of the transverse portion of the second L-shaped positioning member 6 abuts against the edge of the circular cover 104 for positioning the circular cover 104.

[0031] In the utility model, the top of each vertical plate 3 is fixedly connected with a second cross bar 8 , and the transverse part of the second L-shaped positioning member 6 is damped and slidably installed on the corresponding second cross bar 8 .

[0032] Therefore, by moving the second L-shaped positioning member 6 inward along the second cross bar 8, the inner side surface of its transverse portion abuts against the edge of the circular cover 104, thereby positioning the circular cover 104; by moving the second L-shaped positioning member 6 outward along the second cross bar 8, the circular cover 104 can be released from the positioning after the processing is completed.

[0033] In the utility model, connecting upright plates 9 are respectively fixedly connected between the two sides of the two upright plates 3, and the bottom ends of the connecting upright plates 9 are fixedly connected to the base 2, so as to play a role in auxiliary support of the two upright plates 3, which is conducive to keeping the two upright plates 3 perpendicular to the base 2, thereby better ensuring the processing accuracy and processing size consistency.

[0034] In the present invention, the base 2 is provided with an assembly hole 10 for fixedly mounting on a turntable (not shown in the figure) of a machining center, so that the turntable of the machining center drives the entire fixture to rotate.

[0035] The utility model is further described below in conjunction with the accompanying drawings:

[0036] During clamping and positioning, first place a forklift cantilever 1 against the vertical plate 3 on one side, and then move the first L-shaped positioning member 41 inward along the first cross bar 7, so that the end faces of the two limiting cross bars 43 and the inner side faces of the vertical portion of the first L-shaped positioning member 41 respectively correspond to the outer cylindrical surfaces on both sides of the cylindrical member 102, thereby positioning the cylindrical member 102.

[0037] At this time, the outer circumferential surface of the second positioning cross bar 51 abuts against the upper part of the outer curved surface of the crank arm 101, thereby positioning the crank arm 101 from one side. Next, the positioning screw 53 is rotated downward so that its front end abuts against the lower part of the inner curved surface of the crank arm 101, thereby positioning the crank arm 101 from the other side.

[0038] Then, the second L-shaped positioning member 6 is moved inwardly along the second cross bar 8 so that the inner side surface of the transverse portion thereof abuts against the edge of the circular cover member 104 , thereby realizing the positioning of the circular cover member 104 .

[0039] The clamping and positioning of the other forklift cantilever 1 are the same as above and will not be described in detail here.

[0040] After clamping and positioning are completed, the machining center performs boring processing. After processing hole A, the turntable of the machining center drives the entire fixture to rotate 94.59° counterclockwise, and then processes hole B. Through one clamping and one positioning, the two forklift cantilevers can be processed in one sequence, that is, holes A and B are processed in one sequence.

[0041] After the processing is completed, the first L-shaped positioning member 41 is moved outward along the first cross bar 7 to release the positioning of the cylindrical member 102; at the same time, the positioning screw 53 is rotated upward to release the positioning of the curved arm 101; in addition, the second L-shaped positioning member 6 is moved outward along the second cross bar 8 to release the positioning of the circular cover member 104.

[0042] At this point, the processed forklift cantilever 1 can be removed.

[0043] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0044] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A fixture for processing a forklift cantilever, comprising a forklift cantilever and a base. The forklift cantilever includes a curved arm and a cylindrical part and a U-shaped part integrally connected to both ends of the curved arm respectively. On one side of the curved arm, a circular cover part is integrally connected to the outer wall near one end of the U-shaped part. It is characterized in that: The base is fixedly connected to two vertical plates arranged face to face and in parallel, and each vertical plate is fixed with a first positioning component, a second positioning component and a third positioning component in sequence from bottom to top, which are respectively used to support and position the cylindrical part, position the curved arm and position the circular cover.

2. A forklift cantilever processing fixture according to claim 1, characterized in that: The first positioning assembly includes a first L-shaped positioning member, two first positioning cross bars and two limiting cross bars. The vertical portion of the first L-shaped positioning member is arranged vertically upward. The two first positioning cross bars and the two limiting cross bars are respectively located on both sides of the first L-shaped positioning member and are respectively fixedly connected to the bottom of the vertical plate. The upper outer circular surfaces of the two first positioning cross bars are respectively abutted against the lower outer circular surface of the cylindrical member for supporting and positioning the cylindrical member from the bottom; the end faces of the two limiting cross bars and the inner side faces of the vertical portion of the first L-shaped positioning member are respectively abutted against the outer circular surfaces on both sides of the cylindrical member for positioning the cylindrical member from both sides.

3. A forklift cantilever processing fixture according to claim 2, characterized in that: The inner side surface of the vertical portion of the first L-shaped positioning member is an arc-shaped concave surface at the position in contact with the cylindrical member.

4. The forklift cantilever processing fixture according to claim 2, characterized in that: The bottom of each vertical plate is fixedly connected to a first cross bar, and the vertical part of the first L-shaped positioning member is damped and slidably installed on the corresponding first cross bar.

5. The forklift cantilever processing fixture according to claim 1, characterized in that: The second positioning assembly includes a second positioning cross bar, a fixing seat and a positioning screw. The second positioning cross bar is fixedly connected to the upper part of the vertical plate where it is located, and the outer circular surface of the second positioning cross bar abuts against the upper part of the outer curved surface of the curved arm, which is used to position the curved arm from one side; the fixing seat is fixedly connected to the lower part of the vertical plate where it is located, and a screw hole is provided on the fixing seat. The front end of the positioning screw is screwed into the screw hole and extends out, and abuts against the lower part of the inner curved surface of the curved arm, which is used to position the curved arm from the other side.

6. The forklift cantilever processing fixture according to claim 1, characterized in that: The third positioning assembly includes a second L-shaped positioning member, the transverse portion of which is inclined downward along the radial direction of the circular cover, and the inner side surface of the transverse portion of the second L-shaped positioning member abuts against the edge of the circular cover for positioning the circular cover.

7. The forklift cantilever processing fixture according to claim 6, characterized in that: The top of each vertical plate is fixedly connected with a second cross bar, and the transverse part of the second L-shaped positioning member is damped and slidably installed on the corresponding second cross bar.

8. The forklift cantilever processing fixture according to claim 1, characterized in that: Connecting upright plates are respectively fixedly connected between the two sides of the two upright plates, and the bottom ends of the connecting upright plates are fixedly connected to the base.

9. The forklift cantilever processing fixture according to claim 1, characterized in that: The base is provided with an assembly hole for fixedly mounting on a turntable of a machining center.

Images