Adjustable special vehicle crank arm drilling tool clamp

Abstract

The invention provides an adjustable special vehicle crank arm drilling tool clamp. The adjustable special vehicle crank arm drilling tool clamp comprises a support, a support, a placing plate, a lead screw, a sliding rail, a V-shaped block, a drilling sleeve, a first supporting seat and a second supporting seat. According to the distance between crank arm positioning holes, the first supporting base and the second supporting base are moved to proper positions on the sliding rail and then locked, and tensioning and loosening of the V-shaped block are achieved through the lead screw so as to tightly hold the outer circle of a crank arm to be machined. After the crank arm is fixed, the drill bit drills holes through the drill sleeve. In order to achieve one-time clamping, the tool clamp can turn over up and down, and turning-around machining is achieved on the premise that the crank arm to be machined is not disassembled. One-time clamping and positioning of the crank arm in the drilling process can be achieved, parts do not need to be disassembled repeatedly, and meanwhile machining of crank arm positioning holes with different center distances can be met; the crank arm drilling device can facilitate drilling of crank arms by operators, is simple and safe to operate, reduces labor intensity, and improves machining efficiency and machining precision of crank arm positioning holes.

Description

Technical Field

[0001] The invention belongs to the technical field of tooling fixtures, and in particular relates to an adjustable special vehicle crank arm drilling tooling fixture. Background Art

[0002] The crank arm is a key component of the special vehicle motion system. During processing, it is necessary to drill holes first as a positioning reference for subsequent processing. The position accuracy and center distance between the reference holes are the basis for ensuring the dimensions of other positions in the crank arm processing, which directly affects the final quality of the product. The traditional crank arm positioning hole processing adopts the method of manual marking and drilling, which requires multiple flipping of the parts during processing, resulting in poor processing accuracy and low processing efficiency. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] The present invention provides an adjustable special vehicle crank arm drilling tooling fixture to solve the technical problems of low machining efficiency and poor machining accuracy of crank arm positioning holes, realize tooling flexibility, and meet the machining needs of crank arm parts of different specifications.

[0005] (II) Technical solution

[0006] In order to solve the above technical problems, the present invention proposes an adjustable special vehicle crank arm drilling fixture, which includes a bracket, a support, a placement plate, a lead screw, a slide rail, a V-block, a drill sleeve, a first support seat and a second support seat; wherein,

[0007] Positioning plates are installed on the left and right sides of the placement plate, and the placement plate is rotatably connected to the brackets on both sides; the bottom of the bracket is fixed on the workbench of the drilling machine through a support;

[0008] Multiple sets of slide rails are installed on the plate surface of the placement plate; among them, the slide rails located at the upper and lower ends serve as drill sleeve mounting slide rails, on which a drill sleeve is installed to provide guidance for the drill bit; the slide rail located on the inner side of the two sets of drill sleeve mounting slide rails serves as the first support seat mounting slide rail, on which a first support seat is installed, and two V-shaped blocks arranged opposite to each other are installed inside the first support seat, and a lead screw for driving the V-shaped block to move horizontally is installed on the V-shaped block, and the lead screw can drive the V-shaped block to be tightened and loosened to hold the outer circular part of the curved arm to be drilled; the two sets of slide rails located on both sides of the rotating axis of the placement plate serve as the second support seat mounting slide rails, on which a second support seat is installed to install a drill sleeve for providing guidance for the drill bit.

[0009] Furthermore, positioning plates are respectively installed on the left and right sides of the placement plate, and the placement plate is rotatably connected to the brackets on both sides through the positioning plates.

[0010] Furthermore, a bracket end cover is arranged on the outer side of the connection between the positioning plate and the bracket.

[0011] Furthermore, a positioning pin is installed on the bracket for fixing the placement plate.

[0012] Furthermore, a plurality of sets of slide rails are installed on the board surface where the board is placed in a rotationally symmetrical manner.

[0013] Furthermore, the size of the second support base is smaller than that of the first support base.

[0014] (III) Beneficial effects

[0015] The present invention proposes an adjustable special vehicle crank arm drilling fixture, including a bracket, a support, a placement plate, a screw, a slide rail, a V-block, a drill sleeve, a first support seat and a second support seat. According to the distance between the crank arm positioning holes, the first support seat and the second support seat are moved to a suitable position on the slide rail and then locked, and the V-block is tightened and loosened by the screw to hold the outer circle of the crank arm to be processed. After the crank arm is fixed, the drill bit drills holes through the drill sleeve. In order to achieve only one clamping, the fixture of the present invention can be turned upside down to achieve U-turn processing without disassembling the crank arm to be processed. The present invention can realize one-time clamping and positioning of the crank arm during the drilling process, without the need for repeated disassembly of parts, and can also meet the processing of crank arm positioning holes with different center distances; it can facilitate operators to drill holes in the crank arm, the operation is simple and safe, the labor intensity is reduced, and the processing efficiency and processing accuracy of the crank arm positioning holes are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the adjustable special vehicle crank arm drilling fixture of the present invention;

[0017] Figure 2 It is a side view of the adjustable special vehicle crank arm drilling fixture of the present invention.

[0018] In the figure: 1- bracket, 2- support, 3- positioning plate, 4- placement plate, 5- positioning pin, 6- lead screw, 7- slide rail, 8- V-block, 9- drill sleeve, 10- first support seat, 11- second support seat, 12- bracket end cover. DETAILED DESCRIPTION

[0019] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0020] This embodiment provides an adjustable special vehicle crank arm drilling fixture, the structure of which is as follows: Figure 1 and 2 As shown, it mainly includes a bracket 1, a support 2, a positioning plate 3, a placement plate 4, a positioning pin 5, a lead screw 6, a slide rail 7, a V-block 8, a drill sleeve 9, a first support seat 10, a second support seat 11 and a bracket end cover 12.

[0021] Positioning plates 3 are installed on the left and right sides of the placement plate 4, respectively. The placement plate 4 is rotatably connected to the brackets 1 on both sides through the positioning plates 3. The placement plate 4 can rotate 360 ​​degrees on the bracket 1 with the positioning plates 3. A bracket end cover 12 is provided on the outside of the connection between the positioning plate and the bracket 1. The bottom of the bracket 1 is fixed to the workbench of the drilling machine through the support 2. A positioning pin 5 is installed on the bracket 1 to fix the placement plate 4, ensure the stability of the placement plate 4 on the bracket 1, and avoid shaking of the placement plate 4 due to external force during drilling.

[0022] A plurality of sets of slide rails 7 are installed on the plate surface of the placement plate 4 in a rotation axis symmetrical manner. Among them, the slide rails 7 located at the upper and lower ends serve as drill sleeve installation slide rails, on which a drill sleeve 9 is installed to provide guidance for the drill bit. The slide rail 7 located on the inner side of the two sets of drill sleeve installation slide rails serves as a first support seat installation slide rail, on which a first support seat 10 is installed, and two V-shaped blocks 8 arranged opposite to each other are installed inside the first support seat 10, and a lead screw 6 for driving the V-shaped block 8 to move horizontally is installed on the V-shaped block 8, and the lead screw 6 can drive the V-shaped block 8 to be tightened and loosened to hold the outer circular part of the curved arm to be drilled. The two sets of slide rails 7 located on both sides of the rotation axis of the placement plate 4 serve as second support seat installation slide rails, on which a second support seat 11 is installed. The size of the second support seat 11 is smaller than the first support seat 10, and is used to install the drill sleeve 9 for providing guidance for the drill bit.

[0023] The adjustable special vehicle crank arm drilling fixture of the present invention is designed with a slide rail mechanism to achieve the versatility of the fixture, taking into account the different sizes of different center holes of the crank arm. It can meet the processing of crank arms with different center distances. When in use, according to the distance between the positioning holes of the crank arm, the first support seat 10 and the second support seat 11 are moved to the appropriate position on the slide rail 7 and locked, and the V-block 8 is tightened and released by the lead screw 6 to hold the outer circle of the crank arm to be processed. After the crank arm is fixed, the drill bit drills holes through the drill sleeve 9. In order to achieve only one clamping, the fixture of the present invention can be turned upside down to achieve U-turn processing without disassembling the crank arm to be processed. After processing the two positioning holes at the upper end of the crank arm, the positioning pin 5 is pulled out, the positioning plate 3 and the crank arm are rotated 180 degrees, and the positioning pin 5 is reinserted for fixing, and the two positioning holes at the lower end of the crank arm can be processed continuously to ensure that the centers of the two positioning holes at the upper end are consistent with those of the two positioning holes at the lower end.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An adjustable special vehicle crank arm drilling fixture, characterized in that: The adjustable special vehicle crank arm drilling fixture includes a bracket, a support, a placement plate, a lead screw, a slide rail, a V-block, a drill sleeve, a first support seat and a second support seat; wherein, Positioning plates are installed on the left and right sides of the placement plate, respectively, and the placement plate is rotatably connected to the brackets on both sides; the bottom of the bracket is fixed on the workbench of the drilling machine through a support; Multiple groups of slide rails are installed on the surface of the placement plate; among them, the slide rails located at the upper and lower ends serve as drill sleeve mounting slide rails, on which a drill sleeve is installed for providing guidance for the drill bit; the slide rail located on the inner side of the two groups of drill sleeve mounting slide rails serves as a first support seat mounting slide rail, on which a first support seat is installed, and two V-shaped blocks arranged opposite to each other are installed inside the first support seat, and a lead screw for driving the V-shaped block to move horizontally is installed on the V-shaped block, and the lead screw can drive the V-shaped block to be tightened and loosened to hold the outer circular part of the curved arm to be drilled; the two groups of slide rails located on both sides of the rotating axis of the placement plate serve as second support seat mounting slide rails, on which a second support seat is installed for installing a drill sleeve for providing guidance for the drill bit.

2. The adjustable special vehicle crank arm drilling fixture as claimed in claim 1, characterized in that: Positioning plates are respectively installed on the left and right sides of the placement plate, and the placement plate is rotatably connected with the brackets on both sides through the positioning plates.

3. The adjustable special vehicle crank arm drilling fixture as claimed in claim 2, characterized in that: A bracket end cover is arranged outside the connection between the positioning plate and the bracket.

4. The adjustable special vehicle crank arm drilling fixture as claimed in claim 1, characterized in that: The bracket is provided with a positioning pin for fixing the placement plate.

5. The adjustable special vehicle crank arm drilling fixture as claimed in claim 1, characterized in that: A plurality of sets of slide rails are installed on the plate surface of the placement plate in a rotationally symmetrical manner.

6. The adjustable special vehicle crank arm drilling fixture as claimed in claim 1, characterized in that: The second support base is smaller in size than the first support base.

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