Positioning device for machining inner hole of chassis support

Abstract

The utility model relates to a chassis support inner hole machining positioning device which comprises a bottom plate, a positioning seat, supporting seats and adjusting seats are arranged on the bottom plate, a positioning shaft is arranged on the positioning seat, hollow supporting parts are arranged on the tops of the two adjusting seats and the tops of the supporting seats, a first jacking assembly is arranged on one side of one supporting seat, and a second jacking assembly is arranged on the other side of the supporting seat. A second jacking assembly is arranged on one side of the adjusting seat, and a pressing assembly is arranged between the two supporting seats and the positioning seat. The degree of freedom of a workpiece in the horizontal direction is limited through cooperation of the positioning shaft and the two jacking assemblies, the pressing assembly is arranged between the two supporting bases and the positioning base, and the degree of freedom of the workpiece in the vertical direction is limited through cooperation of the pressing assembly, the positioning base, the supporting bases and the adjusting base. The top of the adjusting seat and the top of the supporting seat are each provided with the hollow supporting part, the hollow supporting parts cannot affect machining of the inner hole, and therefore convenience and stability are provided for machining of the inner hole of the workpiece, and the machining precision is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile chassis bracket processing, in particular to a chassis bracket inner hole processing positioning device. Background Art

[0002] The chassis bracket of the automobile is mainly made of castings, which need to be machined after casting to improve the dimensional accuracy. Due to the irregular shape of the chassis bracket, it cannot be directly clamped on the workbench of the CNC center for machining. In order to prevent the bracket from shaking or even shifting during the machining process, it is necessary to use a fixture to position and fix it. Especially when expanding the inner hole, how to design a fixture that can meet the requirements of workpiece fixation and positioning without affecting the expansion process is an urgent problem to be solved. Utility Model Content

[0003] The utility model provides a chassis bracket inner hole processing positioning device to ensure the processing accuracy of the chassis bracket.

[0004] To achieve the above-mentioned purpose, the utility model provides a chassis bracket inner hole processing positioning device, the chassis bracket inner hole processing positioning device comprises a base plate, a positioning seat, a support seat and an adjustment seat are arranged on the base plate, the positioning seat and the adjusting seat are respectively arranged at two ends of the base plate, and a positioning shaft coaxially arranged therewith is arranged on the positioning seat, the adjusting seat can be raised and lowered on the base plate, and hollow supporting parts are arranged on the tops of the adjusting seat and the support seat, and the two support seats are fixedly arranged between the positioning seat and the adjustment seat, and the positions of the two support seats and the adjustment seats correspond to the holes to be processed in the workpiece, a first tightening assembly is arranged on one side of one of the support seats, a second tightening assembly opposite to the first tightening assembly is arranged on one side of the adjusting seat, and a clamping assembly is arranged between the two support seats and the positioning seats.

[0005] The above technical solution limits the freedom of the workpiece in the horizontal direction by cooperating with the positioning shaft, the first clamping assembly and the second clamping assembly. A clamping assembly is provided between the two support seats and the positioning seat. The clamping assembly, the positioning seat, the support seat and the adjustment seat limit the freedom of the workpiece in the vertical direction, thereby positioning the workpiece. In addition, a hollow support portion is provided on the top of the adjustment seat and the support seat to support the workpiece to be processed. The hollow support portion will not affect the processing of the inner hole, thereby providing convenience and stability for the processing of the inner hole of the workpiece and ensuring its processing accuracy.

[0006] Furthermore, the cross section of the support seat is circular, and the bottom end thereof is fixedly connected to the bottom plate, and the support seat and the support part are an integral structure. With such a design, the support part can be milled out by CNC using round steel, which is easy to process.

[0007] Furthermore, the adjustment seat and the support part are an integrated structure, the adjustment seat is cylindrical, and is mounted on the base plate by a stud, the bottom end of the stud is fixedly connected to the base plate, and the stud is threadedly connected to the adjustment seat to form a thread pair. The height of the adjustment seat is adjusted by rotating the stud, so that the adjustment seat and the two fixed seats form a plane positioning.

[0008] Furthermore, the support portion is composed of three arc-shaped support blocks, which are arranged at intervals along the circumferential outer edge of the top surface of the corresponding support seat / adjustment seat, and are arranged radially with the center of the top surface of the corresponding support seat / adjustment seat as the center, and the thickness of the support block is less than the radius of the corresponding support seat / adjustment seat. The support portion of the mechanism is composed of three separate support blocks, which can better provide planar support for the workpiece.

[0009] Furthermore, the first tightening assembly includes a fixing plate and a first tightening stud, the fixing plate is fixed on the side of the base plate, the first tightening stud is threadedly connected to the fixing plate to form a threaded pair, one end of which faces the second tightening assembly and the other end is fixedly connected to an adjustment handle.

[0010] Furthermore, the second tightening assembly includes a fixing column and a second tightening stud, the bottom end of the fixing column is fixedly connected to the base plate, and the top end thereof is fixedly connected to a fixing nut, the second tightening stud passes through the fixing nut toward one end of the first tightening assembly and is threadedly connected to the fixing nut, and the other end is fixedly connected to an adjustment handle.

[0011] The first clamping assembly and the second clamping assembly of the above solution have simple structures, and the clamping and positioning of the workpiece can be achieved by adjusting the clamping studs.

[0012] Furthermore, the clamping assembly includes a pressing plate and two connecting shafts, the two connecting shafts are arranged between the positioning seat and the supporting seat, two connecting grooves are provided on the pressing plate, the notches of the two connecting grooves both penetrate one side of the pressing plate, a connecting rod coaxially arranged therewith is provided on the top surface of the connecting shaft, the bottom end of which is mounted on the bottom plate through a fixing nut, the fixing nut is fixed on the bottom plate, an external thread is provided on the connecting rod, the connecting groove is clamped with the connecting rod and is locked by a clamping nut threadedly connected to the connecting rod so that the pressing plate clamps the workpiece to be processed. The clamping assembly of this structure can adjust the distance between its side and the workpiece as needed, and is convenient to use.

[0013] Furthermore, a positioning portion consisting of an arc-shaped groove adapted to the workpiece is provided in the middle of the side of the pressure plate provided with the notch. The positioning portion enables the pressure plate to better contact with the workpiece, so that it is better positioned, thereby improving the performance of the utility model.

[0014] Compared with the prior art, the utility model has the following technical effects:

[0015] 1. The utility model limits the freedom of the workpiece in the horizontal direction by cooperating with the positioning shaft, the first clamping assembly and the second clamping assembly. A clamping assembly is arranged between the two support seats and the positioning seat. The clamping assembly, the positioning seat, the support seat and the adjustment seat limit the freedom of the workpiece in the vertical direction, thereby positioning the workpiece to prevent it from shaking during processing and improve the processing accuracy.

[0016] 2. The utility model provides a hollow support portion on the top of the adjustment seat and the support seat to support the workpiece to be processed. The hollow support portion does not affect the processing of the inner hole, thereby providing convenience and stability for the inner hole processing of the workpiece and ensuring the processing accuracy of the workpiece;

[0017] 3. The arrangement of the pressing plate, the connecting groove and the connecting rod of the utility model, wherein the connecting groove is in an oblong shape, can conveniently adjust the position of the pressing plate during use, thus improving the convenience of use;

[0018] 4. The pressing plate of the utility model is provided with a positioning portion consisting of an arc-shaped groove, through which the pressing plate can better contact with the workpiece, so that it can be better limited, thereby improving the performance of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute a part of this specification and are used to further understand the present utility model, illustrate preferred embodiments of the present utility model and are used together with the specification to illustrate the principle of the present utility model. In the drawings:

[0020] Figure 1 This is a schematic diagram of the exploded structure of the chassis bracket inner hole processing and positioning device of the utility model;

[0021] Figure 2 It is a schematic diagram of the main structure of the chassis bracket inner hole processing and positioning device of the utility model.

[0022] Numbers in the figure: 1, bottom plate, 2, positioning seat, 3, support seat, 4, adjustment seat, 5, positioning shaft, 6,

[0023] Support part, 7, first tightening assembly, 8, second positioning assembly, 9, pressing assembly, 10, adjusting handle, 11, stud;

[0024] Among them, 601 is a positioning block, 701 is a first tightening screw, 702 is a fixing plate, 801 is a second tightening screw, 803 is a fixing screw barrel, 803 is a fixing column, 901 is a pressure plate, 902 is a connecting shaft, 903 is a connecting groove, 904 is a connecting rod, 905 is a tightening nut, and 906 is a positioning part. DETAILED DESCRIPTION

[0025] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0026] Example: Figure 1 The shown chassis bracket inner hole processing positioning device comprises a base plate 1, on which a positioning seat 2, a support seat 3 and an adjustment seat 4 are arranged, the positioning seat 2 and the adjustment seat 4 are respectively arranged at the two ends of the base plate 1, a positioning shaft 5 coaxially arranged therewith is arranged on the positioning seat 2, the adjustment seat 4 can be raised and lowered on the base plate 1, a hollow support portion 6 is arranged on the top of the adjustment seat 4 and the support seat 3, two support seats 3 are fixedly arranged between the positioning seat 2 and the adjustment seat 4, the two support seats 3 and the adjustment seat 4 are at the three vertices of a triangle, that is, the projections of the two support seats 3 and the adjustment seat 4 on the base plate 1 are located on a triangle and are respectively located at the vertices of the triangle, and the two support seats 3 and the adjustment seat 4 respectively correspond to the holes to be processed in the workpiece. A first tightening assembly 7 is arranged on one side of one of the support seats 3, and a second tightening assembly 8 opposite to the first tightening assembly 7 is arranged on one side of the adjustment seat 4. The positioning shaft 5 and the first clamping assembly 7 and the second clamping assembly 8 cooperate to limit the freedom of the workpiece in the horizontal direction. A clamping assembly 9 is arranged between the two support seats 3 and the positioning seat 2. The clamping assembly 9 and the positioning seat 2 and the support seat and the adjustment seat cooperate to limit the freedom of the workpiece in the vertical direction, thereby positioning the workpiece. In addition, a hollow support portion 6 is arranged on the top of the adjustment seat 4 and the support seat 3 to support the workpiece to be processed. The hollow support portion 6 will not affect the processing of the inner hole, thereby providing convenience and stability for the processing of the inner hole of the workpiece and ensuring its processing accuracy.

[0027] It should be noted that the use of terms such as "first" and "second" to define the clamping components is only for the convenience of distinguishing them, and the above terms have no special meanings.

[0028] In this embodiment, the support seat 3 is a cylinder, the bottom end of the support seat 3 is fixedly connected to the bottom plate 1, and a support portion 6 is arranged on the top surface thereof, and the support seat 3 and the support portion 6 are an integral structure. The support portion 6 is three arc-shaped support blocks 601, and the three support blocks 601 are arranged at intervals along the circumference of the outer edge of the corresponding top surface of the support seat 3. The outer side surfaces of the three support blocks 601 and the surface of the support seat 3 are located on the same cylindrical surface, and the three support blocks are arranged radially with the center of the circle of the top surface of the support seat 3 as the center. The thickness of the support block 601 is less than the radius of the support seat 3, so that the circle in which the three support blocks are arranged is hollow to avoid the tool for reaming. In order to facilitate the installation of the support seat 3, the two support seats 3 are connected and fixed to the bottom plate 1 by screws. In other embodiments, the support blocks 601 can also be set to 3 or 4 and other integers greater than 3. Because the triangle has stability, it is preferred that the support blocks 601 are set to 3.

[0029] The adjustment seat 4 is installed on the base plate 1 through the stud 9. The adjustment seat 4 is a cylinder. The bottom end of the stud 11 is fixedly connected to the base plate 1. The stud 11 is threadedly connected to the adjustment seat 4 to form a threaded pair. The support part 6 is arranged on the top surface of the adjustment seat 4 and is an integral structure with the adjustment seat 4.

[0030] The support portion 6 is composed of three arc-shaped support blocks 601, which are arranged at intervals along the circumference of the outer edge of the top surface of the adjustment seat 4, and are arranged radially with the center of the top surface of the adjustment seat 4 as the center. The thickness of the support block 601 is smaller than the radius of the adjustment seat 4.

[0031] like Figure 2 As shown, the structure of the first tightening assembly of this embodiment is as follows: the first tightening assembly 7 includes a fixing plate 702 and a fixing plate 701, the fixing plate 702 is fixed on the side of the base plate 1, the fixing plate 701 is threadedly connected with the fixing plate 702 to form a threaded pair, one end of which faces the second tightening assembly 8, and the other end is fixedly connected with an adjustment handle 10.

[0032] See also Figure 1 and Figure 2 The second tightening assembly 8 of this embodiment includes a fixing column 803 and a second tightening stud 801. The bottom end of the fixing column 803 is fixedly connected to the base plate 1, and the top end thereof is fixedly connected to a fixing screw sleeve 802. One end of the second tightening stud 801 passes through the fixing screw sleeve 802 toward the first tightening assembly 7 and is threadedly connected to the fixing screw sleeve 802, and the other end is fixedly connected to an adjusting handle 10.

[0033] In this embodiment, the structure of the clamping assembly is as follows: Figure 1 The clamping assembly 9 includes a pressing plate 901 and two connecting shafts 902. The pressing plate 901 is a rectangular steel plate. The two connecting shafts 902 are arranged between the positioning seat 2 and the supporting seat 3. Two connecting grooves 903 are provided on the pressing plate 901. The notches of the two connecting grooves 903 both penetrate one side of the pressing plate 901. The connecting groove 903 is an elongated circular groove formed by a rectangular and semicircular projection on the horizontal plane. A connecting rod 904 coaxially arranged therewith is provided on the top surface of the connecting shaft 902. The bottom end of the connecting rod 904 is mounted on the bottom plate 1 through a fixing nut 12. The fixing nut 12 is fixed on the bottom plate 1. An external thread is provided on the connecting rod 904. The connecting groove 903 is engaged with the connecting rod 904 and is locked by a clamping nut 905 threadedly connected to the connecting rod 904 so that the pressing plate 901 clamps the workpiece to be processed. In this embodiment, in order to increase the contact area between the clamping nut 905 and the pressing plate 1 , a pressing sheet is provided between the clamping nut 905 and the pressing plate 901 , and the pressing sheet is fixedly connected to the clamping nut 905 .

[0034] In order to make the side of the pressing plate 1 fit the workpiece and better limit the position, a positioning portion 906 consisting of an arc groove adapted to the workpiece is provided in the middle of the side of the pressing plate 1 with a notch. When in use, the positioning portion 906 is contacted with the side wall of the workpiece by adjusting the position of the pressing plate 1.

[0035] When the chassis bracket inner hole machining positioning device of the above embodiment is applied, refer to Figure 2 First, clamp the base plate onto the workbench of the CNC center, place the bracket to be processed on the positioning seat 1, the support seat 3 and the adjustment seat 4, and make the positioning shaft 5 fit into the corresponding hole of the bracket. By adjusting the height of the adjustment seat 4, the two support seats 3 and the adjustment seat 4 form a plane support and positioning for the bracket. The pressure plate 901 is connected to the connecting rod 904 through the clamping nut 905 to clamp the bracket. The bracket is fixed in the vertical direction by the pressure plate 901, the positioning seat 1, the support seat 3 and the adjustment seat 4. The handle 10 is rotated so that the first tightening stud 701 and the second tightening stud 801 tighten the workpiece, thereby positioning the bracket in the horizontal direction. The cooperation of the first tightening assembly 7, the second tightening assembly 8 and the positioning shaft 5 limits the horizontal freedom of the bracket, and fixes it in a limited position to prevent shaking during the processing and ensure the processing quality.

[0036] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A chassis bracket inner hole processing positioning device, comprising a bottom plate, characterized in that: A positioning seat, a supporting seat and an adjusting seat are arranged on the base plate, the positioning seat and the adjusting seat are respectively arranged at two ends of the base plate, a positioning shaft coaxially arranged therewith is arranged on the positioning seat, the adjusting seat can be raised and lowered on the base plate, hollow supporting parts are arranged on the tops of the adjusting seat and the supporting seat, the two supporting seats are fixedly arranged between the positioning seat and the adjusting seat, the positions of the two supporting seats and the adjusting seat correspond to the holes to be processed in the workpiece, a first clamping assembly is arranged on one side of one of the supporting seats, a second clamping assembly opposite to the first clamping assembly is arranged on one side of the adjusting seat, and a clamping assembly is arranged between the two supporting seats and the positioning seats.

2. The chassis bracket inner hole processing and positioning device according to claim 1, characterized in that: The cross section of the support seat is circular, and the bottom end thereof is fixedly connected to the bottom plate. The support seat and the support part are an integral structure.

3. The chassis bracket inner hole processing and positioning device according to claim 2, characterized in that: The adjustment seat and the support part are an integral structure. The adjustment seat is cylindrical and is installed on the base plate through a stud. The bottom end of the stud is fixedly connected to the base plate. The stud is threadedly connected to the adjustment seat to form a threaded pair.

4. The chassis bracket inner hole processing and positioning device according to claim 3, characterized in that: The support portion is three arc-shaped support blocks, which are arranged at circumferential intervals along the outer edge of the top surface of the corresponding support seat / adjustment seat, and are arranged radially with the center of the top surface of the corresponding support seat / adjustment seat as the center, and the thickness of the support block is smaller than the radius of the corresponding support seat / adjustment seat.

5. The chassis bracket inner hole processing and positioning device according to claim 1, characterized in that: The first tightening assembly includes a fixing plate and a first tightening stud, wherein the fixing plate is fixed on the side of the base plate, the first tightening stud is threadedly connected with the fixing plate to form a thread pair, one end of which faces the second tightening assembly and the other end is fixedly connected with an adjustment handle.

6. The chassis bracket inner hole processing and positioning device according to claim 5, characterized in that: The second tightening assembly includes a fixing column and a second tightening stud, the bottom end of the fixing column is fixedly connected to the base plate, and the top end is fixedly connected to a fixing screw sleeve, the second tightening stud passes through the fixing screw sleeve toward one end of the first tightening assembly and is threadedly connected to the fixing screw sleeve, and the other end is fixedly connected to an adjustment handle.

7. The chassis bracket inner hole processing and positioning device according to claim 1, characterized in that: The clamping assembly includes a pressing plate and two connecting shafts, the two connecting shafts are arranged between the positioning seat and the supporting seat, two connecting grooves are provided on the pressing plate, the notches of the two connecting grooves both pass through one side of the pressing plate, a connecting rod coaxially arranged therewith is provided on the top surface of the connecting shaft, the bottom end of the connecting rod is mounted on the base plate through a fixing nut, the fixing nut is fixed on the base plate, an external thread is provided on the connecting rod, the connecting groove is clamped with the connecting rod and is locked by a clamping nut threadedly connected to the connecting rod so that the pressing plate clamps the workpiece to be processed.

8. The chassis bracket inner hole processing and positioning device according to claim 7, characterized in that: The middle part of the side surface of the pressing plate with the notch is provided with a positioning portion consisting of an arc-shaped groove adapted to the workpiece.

Images