Cross lock pin hole machining clamp
By designing a cross lock pin hole machining fixture for processing lightweight automotive shock absorber brackets, the combined structure of guide splines and positioning pins is used to achieve accurate positioning and processing, solving the problem of low machining accuracy of existing fixtures and improving the safety and quality of the product.
Patent Information
- Application Number
- CN202420572178.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-24
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-03-24
AI Technical Summary
The existing cross locking pin hole fixtures are not positioned accurately when processing lightweight automotive shock absorber brackets, resulting in poor positioning of pin holes after processing, unable to guarantee product quality, and there are loose clamping and safety hazards.
A cross locking pin hole processing fixture is designed, including a base, support plate and drilling plate. It uses guide splines to combine with the machine tool to achieve locking in the XY direction through the support plate and positioning pin, and the middle positioning plate and locking pin realize the movement of the Z direction. The drill sleeve on the drilling plate is used to drill holes to ensure accurate positioning and simple structure.
This fixture can ensure processing quality, increase safety factor, greatly improve product production efficiency, reduce manufacturing costs, solve the problem of low machining accuracy of existing fixtures, and ensure product safety and quality.
Smart Images
Figure CN222643818U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bracket processing auxiliary tools, and more specifically, to a cross lock pin hole processing fixture. Background Art
[0002] In the prior art, the rear axle system of an automobile usually adopts an integral drive axle with a multi-link plus coil spring suspension structure, and the shock absorber fixing bracket is mainly used for the integral drive axle with a multi-link plus coil spring suspension structure, and is welded to the bridge tube using carbon dioxide shielded welding. Its main function is to connect with the shock absorber assembly, connecting the automobile drive axle and the shock absorber as a whole, playing the purpose of supporting and buffering energy absorption, so that the vehicle maintains good comfort and handling stability.
[0003] When the car is driving, the shock absorber bracket is subjected to a complex force condition of bending and torsion due to the multiple constraints of the drive axle, shock absorber and the alternating changes of road load. The greater the impact of the road on the wheel, the stronger the bending and torsion of the bracket. Therefore, there are certain design requirements for the strength, rigidity, torsion resistance and weld penetration of the shock absorber bracket. Otherwise, the shock absorber bracket will produce fatigue cracks due to various driving conditions of the car.
[0004] In order to solve the above problems, our company invented a lightweight automobile shock absorber bracket 6. For the specific structure, please refer to Figure 4 and Figure 5 As shown, for the above structure, a cross lock pin hole fixture is needed to perform drilling.
[0005] However, due to its complex structure, the existing fixture has a large gap between the positioning pin and the hole and the weight of the part, which leads to excessive positioning of the pin hole after processing, and the product quality cannot be guaranteed. This positioning method may also cause the clamping to become loose, and the product safety factor is low, posing certain safety hazards.
[0006] Therefore, the drilling fixture is continuously improved to meet practical needs. Utility Model Content
[0007] The utility model provides a cross lock pin hole processing fixture, which can ensure processing quality, increase safety factor, greatly improve product production efficiency, and reduce manufacturing cost, so as to solve the problem that the existing fixture has low processing accuracy for lightweight automobile shock absorber bracket and is difficult to meet actual needs.
[0008] According to one aspect of the utility model, a cross lock pin hole processing fixture is provided, including a base, a support plate and a drill plate, the support plate is installed in parallel on the base and its top is connected through the drill plate, two drill sleeves are arranged at intervals on the drill plate, a positioning pin is installed on the support plate, and a middle positioning plate is installed on the drill plate, a locking pin is arranged on the middle positioning plate, and the middle positioning plate is located on one side between the two support plates, and a groove for avoiding the drill bit is arranged on the positioning pin.
[0009] Preferably, based on the above solution, a guide spline is provided at the bottom of the base.
[0010] Preferably, based on the above scheme, a movable weight is also included.
[0011] Preferably, based on the above solution, the perpendicularity between the center line of the drill sleeve and the end surface of the base is not greater than 0.1 mm.
[0012] Preferably, based on the above solution, the hardness of the drill sleeve is HRC58-64.
[0013] The utility model discloses a processing fixture which adopts a bottom plate as an installation base and utilizes a guide key on the bottom plate. The structure combined with a machine tool can be placed at different positions of a machine tool workbench by changing the position of the guide key. If the position is sufficient, the fixture of the product previously processed on the machine tool can be placed at the same time.
[0014] On the other hand, the support plates are arranged at intervals to form mutual positioning and locking with the holes in the middle of the shock absorber bracket. The locking in the XY directions can be achieved by combining with the positioning pin in the middle, and the movement in the Z direction can be achieved by using the locking pin on the middle positioning plate. The drill sleeve on the drill plate can be used to drill holes. The operation is convenient and the structure is simple with precise positioning. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0016] Attached photos:
[0017] Figure 1 It is a front view of the cross lock pin hole processing fixture of the utility model;
[0018] Figure 2 It is a left side view of the cross lock pin hole processing fixture of the utility model;
[0019] Figure 3 It is a right side view of the cross lock pin hole processing fixture of the utility model;
[0020] Figure 4 It is a three-dimensional diagram of the lightweight automobile shock absorber bracket of the utility model;
[0021] Figure 5 Another view of the lightweight automobile shock absorber bracket of the utility model;
[0022] Description of Figure Numbers:
[0023] Base 1, support plate 2, positioning pin 21, groove 22, drill plate 3, drill sleeve 31, middle positioning plate 4, locking pin 41. DETAILED DESCRIPTION
[0024] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0025] It should be understood that when used in this specification and the appended claims, the term "comprising" indicates the presence of described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections.
[0026] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".
[0027] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.
[0028] In the embodiments shown in the drawings, the directions (such as up, down, left, right, front and back) used to explain the structure and movement of the various components of the present invention are not absolute but relative. These descriptions are appropriate when the components are in the positions shown in the drawings. If the description of the positions of the components changes, the directions also change accordingly.
[0029] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.
[0031] See also Figure 1 , and combined with Figure 2 and Figure 3 As shown, a cross lock pin hole processing fixture of the utility model comprises a base 1, a support plate 2 and a drill plate 3, the support plate 2 is mounted on the base 1 in parallel, the top of the support plate 2 is connected through the drill plate 3, two drill sleeves 31 are arranged at intervals on the drill plate 3, a positioning pin 21 is mounted on the support plate 2, and a middle positioning plate 4 is mounted on the drill plate 3, a locking pin 41 is arranged on the middle positioning plate 4, and the middle positioning plate 4 is located on one side between the two support plates 2, and a groove 22 for avoiding the drill bit is arranged on the positioning pin 21.
[0032] When in use, the base 1 is installed on the machine tool through the guide spline provided at the bottom, the shock absorber fixing bracket is installed on the processing fixture of the present application, the front hole of the shock absorber fixing bracket is locked and positioned through the middle positioning plate 4, and the positioning pins 21 on the support plates 2 on both sides are used to fix it to the middle part of the shock absorber fixing bracket, and the shock absorber fixing bracket can be drilled through the drill sleeve 31 on the drill plate 3.
[0033] Furthermore, the utility model also includes a movable pressure iron, which can be used to connect the parts and the clamp to ensure the stability of the connection.
[0034] In order to ensure the accuracy of drilling, the verticality between the center line of the drill sleeve 31 of the utility model and the end face of the base 1 is not greater than 0.1mm, and the hardness of the drill sleeve 31 is HRC58-64. Among them, the coaxiality of the positioning pin 21 installed on the support plate 2 is 0.02mm, and the parallelism with the bottom surface is 0.1mm. After the movable pressure iron is locked, the fixture plane where the large and small positioning pins 21 on the left side are located should have a certain gap with the parts, and during use, the positioning pins 21 and the drill sleeve 31 need to be checked regularly to prevent wear and deformation, and replaced in time if problems are found.
[0035] The utility model discloses a processing fixture which adopts a bottom plate as an installation base and utilizes a guide key on the bottom plate. The structure combined with a machine tool can be placed at different positions of a machine tool workbench by changing the position of the guide key. If the position is sufficient, the fixture of the product previously processed on the machine tool can be placed at the same time.
[0036] On the other hand, the support plate 2 is arranged at intervals to form mutual positioning and locking with the hole in the middle of the shock absorber bracket. Combined with the middle positioning pin 21, it can be locked in the XY direction, and the locking pin 41 on the middle positioning plate 4 can be used to achieve movement in the Z direction. The drill sleeve 31 on the drill plate 3 can be used to drill holes. The operation is convenient and easy, the structure is simple, and the positioning is accurate.
[0037] First, the fixture is hoisted onto the machine tool workbench, and the two guide keys are typed into the slots of the workbench, and then the fixture is fixed on the machine tool workbench. The two Φ30 holes of the workpiece pass through the two large locating pins 21, and the Φ15 hole passes through the small locating pin 21. Insert the movable pressure iron at the screw connecting the large locating pin 21 on the right side of the part, and lock the movable pressure block.
[0038] Issues to note:
[0039] 1. The large positioning pin 21 must be provided with a groove 22 to avoid drilling. Figure 2 The large locating pin 21 on the right side is 22 in length, which is convenient for inserting the movable weight.
[0040] 2. The coaxiality of the two large positioning pins 21 is 0.02 and the parallelism with the bottom surface is 0.1.
[0041] 3. After the movable pressure iron is locked, there should be a certain gap between the fixture plane where the left side large and small positioning pins 21 are located and the parts.
[0042] 4. Check the positioning pin 21 and the drill sleeve 31 regularly to prevent wear and deformation. If any problems are found, replace them in time.
[0043] Finally, the method of this application is only a preferred implementation scheme and is not intended to limit the protection scope of the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A cross lock pin hole processing fixture, characterized in that: It includes a base, a support plate and a drill plate, wherein the support plate is installed parallel to the base and the top of the support plate is connected to the drill plate, two drill sleeves are arranged at intervals on the drill plate, a positioning pin is installed on the support plate, and a middle positioning plate is installed on the drill plate, a locking pin is arranged on the middle positioning plate, and the middle positioning plate is located on one side between the two support plates, and a groove for avoiding the drill bit is arranged on the positioning pin.
2. A cross lock pin hole processing fixture as claimed in claim 1, characterized in that: The bottom of the base is provided with a guide spline.
3. A cross lock pin hole processing fixture as claimed in claim 1, characterized in that: Also includes a movable weight.
4. A cross lock pin hole processing fixture as claimed in claim 1, characterized in that: The verticality between the center line of the drill sleeve and the end surface of the base is not greater than 0.1 mm.
5. A cross lock pin hole processing fixture as claimed in claim 1, characterized in that: The hardness of the drill sleeve is HRC58-64.