Hydraulic fixture for processing of exit brake backing plate for vehicles

Abstract

The utility model discloses an export hydraulic clamp of brake bottom plate processing for vehicle, including brake bottom plate and the clamping body for clamping brake bottom plate, the utility model discloses, and the part main body compression is completed by two corner oil cylinder modules, and linear push cylinder module mainly plays the supplementary compression support effect, ensures the tool in the processing two pair of through -hole part does not vibrate and deformation, makes two pair of through -hole size and position tolerance satisfy high accuracy requirement, this clamp can complete the machining of center big reference hole, one end camshaft hole and the other end two pair of through -hole in one clamping, realizes the process concentration, and through the machining center makes every kind of hole realize the process of expansion, half -precision boring, precision boring to improve the position accuracy between hole series, satisfies the customer high accuracy requirement. The clamp has the advantages of high and stable product quality, low labor intensity, high production efficiency, fast and convenient clamping, high safety performance and the like.

Description

Technical Field

[0001] This utility model relates to the technical field of drilling and boring equipment for export vehicle brake base plates, and in particular to a jig for machining key holes in export vehicle brake base plates. Background Technology

[0002] Drum brakes are commonly used automotive braking components, especially in commercial vehicles, serving as the actuators for decelerating or stopping the vehicle. The brake backing plate is a major supporting component of the drum brake, upon which the brake shoes and camshaft are mounted. The braking performance of the brake is largely determined by the size and positional accuracy of its mounting holes. With increasing customer demands for driving comfort, higher requirements are being placed on the machining precision of the brake backing plate to improve braking reliability and smoothness, especially for export vehicles.

[0003] Currently, most methods for machining the hole system of brake base plates involve concentrated machining operations on machining centers, with manual clamping as the primary method. However, this method suffers from drawbacks. Manual clamping makes it difficult to control the clamping force, often resulting in microscopic deformation of the workpiece and unavoidable machining vibrations. While this method may barely meet the requirements for brake base plates with lower hole precision, it is completely inadequate for the high-precision requirements and thin-walled parts of this export vehicle brake base plate project. Therefore, we designed this hydraulic fixture, which not only meets the precision requirements of the parts but also significantly improves machining efficiency and reduces the labor intensity of workers. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a hydraulic clamp for processing brake base plates for export vehicles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a hydraulic clamp for processing brake base plates for export vehicles, comprising a brake base plate and a clamping body for clamping the brake base plate. The upper wall of the clamping body is provided with a boss, and the upper wall of the boss is provided with a planar support and positioning structure for supporting and positioning the brake base plate. The upper wall of the clamping body and located on the left and right sides of the boss are provided with clamping structures for pressing the brake base plate. The rear wall of the boss is provided with a rear positioning structure for pressing the brake base plate from the rear. The upper wall of the boss and near the center is provided with a moving positioning module for radially positioning the brake base plate. The upper wall of the boss and near the front wall is provided with an anti-rotation structure for limiting the rotational freedom of the brake base plate.

[0006] As a further description of the above technical solution:

[0007] The planar support positioning structure includes three sets of first positioning support plates and one set of second positioning support plates. The three sets of first positioning support plates and one set of second positioning support plates are all fixedly connected to the upper wall of the boss. The three sets of first positioning support plates are respectively close to the left side wall, rear wall and right side wall of the boss, and the second positioning support plate is close to the front wall of the boss. When the clamping body clamps the braking base plate, it performs planar support positioning through the three sets of first positioning support plates and one set of second positioning support plates.

[0008] As a further description of the above technical solution:

[0009] The clamping structure includes two sets of corner cylinder modules. Both sets of corner cylinder modules are fixedly connected to the upper wall of the clamping body and are located on the left and right sides of the boss respectively. A set of wide-head pressure plates is fixedly connected to the end of the drive shaft of each set of corner cylinder modules. The opposite ends of the two sets of wide-head pressure plates extend towards the center of the boss in the left and right direction.

[0010] As a further description of the above technical solution:

[0011] The rear positioning structure includes a linear push cylinder module and a linear pressure plate. The linear push cylinder module is mounted on the rear wall of the boss via a fixed seat. The fixed seat is fixedly connected to the rear wall of the boss. The linear push cylinder module is fixedly connected to the front wall of the fixed seat and located above the boss. The linear pressure plate is rotatably connected to the end of the drive shaft of the linear push cylinder module.

[0012] As a further description of the above technical solution:

[0013] The mobile positioning module consists of a positioning disk and a positioning sleeve. The positioning sleeve is rotatably connected to the upper wall of the boss via a pin, and the positioning disk is slidably connected to the outer wall of the positioning sleeve.

[0014] As a further description of the above technical solution:

[0015] The anti-rotation structure includes an anti-rotation positioning pin module and an elastic pressure component. The anti-rotation positioning pin module and the elastic pressure component are arranged in a left-right distribution and are fixedly connected to the upper wall of the boss, and are both close to the front wall of the boss. The anti-rotation positioning pin module and the elastic pressure component are respectively provided with an anti-rotation screw and a clamping screw on opposite sides. The anti-rotation screw and the clamping screw have collinear axes.

[0016] This utility model has the following beneficial effects:

[0017] Compared with existing technologies, this hydraulic fixture for machining automotive brake base plates utilizes two rotary cylinder modules for clamping the main body of the part, while a linear push cylinder module primarily serves as an auxiliary clamping and support module. This ensures that the part does not vibrate or deform when the tool is machining the two through holes, allowing the dimensional and positional tolerances of the two through holes to meet high-precision requirements. This fixture can complete the machining of the central large reference hole, one end camshaft hole, and the two through holes at the other end in a single setup, achieving process consolidation. Furthermore, the machining center enables each type of hole to undergo enlargement, semi-finish boring, and finish boring processes, thereby improving the positional accuracy between the hole systems and meeting customers' high-precision requirements. This fixture offers advantages such as high and stable product quality, low labor intensity, high production efficiency, quick and convenient clamping, and high safety performance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a hydraulic clamp for machining brake base plates for export vehicles, as proposed in this utility model.

[0019] Figure 2 This is a top view schematic diagram of a hydraulic clamp for machining brake base plates for export vehicles proposed in this utility model;

[0020] Figure 3 This is a side view of the clamping state of a hydraulic clamp for processing brake base plates for export vehicles, as proposed in this utility model.

[0021] Legend:

[0022] 1. Clamping body; 101. Boss; 2. Corner cylinder module; 201. Wide head pressure plate; 3. Linear push cylinder module; 301. Linear pressure plate; 4. Elastic pressure assembly; 401. Clamping screw; 5. Moving positioning module; 501. Positioning disc; 502. Positioning sleeve; 6. Anti-rotation positioning pin module; 601. Anti-rotation screw; 7. First positioning support plate; 8. Second positioning support plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1 to 3 The present invention provides a hydraulic clamp for processing brake base plates for export vehicles: including a brake base plate and a clamping body 1 for clamping the brake base plate, wherein a boss 101 is provided on the upper wall of the clamping body 1;

[0025] In order to achieve stable planar support and positioning of the brake base plate and avoid machining errors caused by uneven reference, the upper wall of the boss 101 is provided with a planar support and positioning structure for planar support and positioning of the brake base plate. The planar support and positioning structure includes three sets of first positioning support plates 7 and one set of second positioning support plates 8. The three sets of first positioning support plates 7 and one set of second positioning support plates 8 are all fixedly connected to the upper wall of the boss 101. The three sets of first positioning support plates 7 are close to the left side wall, rear wall and right side wall of the boss 101 respectively, and the second positioning support plate 8 is close to the front wall of the boss 101. When the clamping body 1 clamps the brake base plate, the planar support and positioning is achieved through the three sets of first positioning support plates 7 and one set of second positioning support plates 8.

[0026] The brake base plate is stably supported on a high-precision plane composed of three sets of first positioning support plates 7 and one set of second positioning support plates 8, which effectively restricts the vertical degree of freedom and part of the rotational degree of freedom of the part, providing a stable and reliable positioning reference for the subsequent precision machining of the hole system, and fundamentally reducing the risk of machining dimensional deviations caused by unstable positioning or deformation under force.

[0027] In order to achieve efficient, stable and controllable clamping force and overcome the problems of uneven manual clamping force and micro-deformation, a clamping structure for clamping the brake base plate is provided on the upper wall of the clamp body 1 and on the left and right sides of the boss 101. The clamping structure includes two sets of corner cylinder modules 2. The two sets of corner cylinder modules 2 are fixedly connected to the upper wall of the clamp body 1 and are located on the left and right sides of the boss 101 respectively. A set of wide head pressure plates 201 are fixedly connected to the end of the drive shaft of the two sets of corner cylinder modules 2. The opposite ends of the two sets of wide head pressure plates 201 extend towards the center of the boss 101 in the left and right direction.

[0028] When the two sets of rotating cylinder modules 2 are activated, they drive the wide head pressure plate 201 at their ends to rotate and press against the left and right sides of the brake base plate. The wide contact surface of the wide head pressure plate 201 ensures that the clamping force is evenly distributed, avoiding local stress concentration. The constant and adjustable clamping force provided by the hydraulic system effectively suppresses vibration during the processing and prevents micro-deformation of the thin-walled brake base plate due to improper clamping force, thereby ensuring the processing quality of the high-precision hole system.

[0029] In order to provide reliable auxiliary support and clamping force from the rear and ensure that the parts do not vibrate or deform during the machining of the perforation, the rear wall of the boss 101 is provided with a rear positioning structure for clamping the brake base plate from the rear. The rear positioning structure includes a linear push cylinder module 3 and a linear pressure plate 301. The linear push cylinder module 3 is set on the rear wall of the boss 101 through a fixed seat. The fixed seat is fixedly connected to the rear wall of the boss 101. The linear push cylinder module 3 is fixedly connected to the front wall of the fixed seat and located above the boss 101. The linear pressure plate 301 is rotatably connected to the end of the drive shaft of the linear push cylinder module 3.

[0030] The linear push cylinder module 3 drives the linear pressure plate 301 to move forward, applying a stable clamping force from the rear side of the brake base plate. This force, together with the front and lateral positioning and clamping forces, forms a complete constraint system. Especially when the tool is machining two through holes, this auxiliary support can effectively absorb the cutting force, prevent the parts from warping or vibrating, and ensure that the dimensional accuracy and positional tolerance of the two through holes meet the strict requirements of export vehicles.

[0031] In order to achieve rapid and accurate radial positioning of the center reference hole of the brake base plate and to adapt to possible dimensional changes and prevent circumferential movement during the processing, a moving positioning module 5 for radial positioning of the brake base plate is provided on the upper wall of the boss 101 near the center. The moving positioning module 5 consists of a positioning disk 501 and a positioning sleeve 502. The positioning sleeve 502 is rotatably connected to the upper wall of the boss 101 by a pin, and the positioning disk 501 is slidably connected to the outer wall of the positioning sleeve 502.

[0032] The moving positioning module 5 restricts the radial movement freedom of the part. The design of the moving positioning module 5 enables the fixture to adapt to a certain range of hole diameter or position deviation, ensuring that the brake base plate can be accurately positioned with the center hole as the reference during each clamping, laying a solid foundation for subsequent machining of other hole systems with this hole as the reference.

[0033] In order to completely restrict the rotational freedom of the brake base plate and prevent it from circumferentially moving during the processing, an anti-rotation structure is provided on the upper wall of the boss 101 near the front wall to limit the rotational freedom of the brake base plate. The anti-rotation structure includes an anti-rotation positioning pin module 6 and an elastic pressure component 4. The anti-rotation positioning pin module 6 and the elastic pressure component 4 are arranged in a left-right distribution and are fixedly connected to the upper wall of the boss 101 in sequence, and are both close to the front wall of the boss 101. An anti-rotation screw 601 and a clamping screw 401 are respectively provided on the opposite side of the anti-rotation positioning pin module 6 and the elastic pressure component 4. The anti-rotation screw 601 and the clamping screw 401 are coaxial.

[0034] The anti-rotation screw 601 on the anti-rotation positioning pin module 6 and the clamping screw 401 on the elastic pressure assembly 4 work together to act on a specific structure (such as a flange or groove) at the front of the brake base plate. The anti-rotation screw 601 provides rigid positioning to limit rotation, while the clamping screw 401 provides continuous clamping force under the action of the elastic element, further eliminating gaps. This rigid-flexible anti-rotation method ensures that the brake base plate will not move in any circumferential direction when subjected to cutting torque, and ensures the precise relative positional relationship between all machined holes.

[0035] Working principle: The brake base plate is stably supported on a high-precision plane composed of three sets of first positioning support plates 7 and one set of second positioning support plates 8, effectively restricting the vertical degree of freedom and some rotational degree of freedom of the part. This provides a stable and reliable positioning reference for the subsequent precision machining of the hole system, fundamentally reducing the risk of dimensional deviations caused by unstable positioning or deformation under stress. When the two sets of corner cylinder modules 2 are activated, they drive the wide-head pressure plate 201 at its end to rotate and press against the left and right sides of the brake base plate. The wide contact surface of the wide-head pressure plate 201 ensures uniform distribution of clamping force, avoiding local stress concentration. The constant and adjustable clamping force provided by the hydraulic system effectively suppresses vibration during the machining process and prevents micro-deformation of the thin-walled brake base plate due to improper clamping force, thereby ensuring the machining quality of the high-precision hole system. The linear push cylinder module 3 drives the linear pressure plate 301 to move forward, applying a stable clamping force from the rear side of the brake base plate. This force, together with the front and lateral positioning and clamping forces, constitutes a complete constraint system, especially... When machining two through holes, the auxiliary support effectively absorbs cutting forces, preventing warping or vibration of the parts and ensuring that the dimensional accuracy and positional tolerance of the two through holes meet the stringent requirements of export vehicles. The moving positioning module 5 restricts the radial movement freedom of the parts. The design of the moving positioning module 5 allows the fixture to adapt to a certain range of hole diameter or positional deviations, ensuring that the brake base plate can be accurately positioned with the center hole as the reference each time it is clamped, laying a solid foundation for subsequent machining of other hole systems with this hole as the reference. The anti-rotation positioning pin module 6 has an anti-rotation screw 601 that works in conjunction with the clamping screw 401 on the elastic pressure assembly 4, acting together on a specific structure (such as a flange or groove) at the front of the brake base plate. The anti-rotation screw 601 provides rigid positioning to limit rotation, while the clamping screw 401 provides continuous clamping force under the action of the elastic element, further eliminating gaps. This rigid-flexible anti-rotation method ensures that the brake base plate will not move circumferentially when subjected to cutting torque, ensuring the precise relative positional relationship between all machined hole systems.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A hydraulic clamp for machining brake base plates for exported vehicles, characterized in that: The device includes a brake base plate and a clamping body (1) for holding the brake base plate. The upper wall of the clamping body (1) is provided with a boss (101). The upper wall of the boss (101) is provided with a plane support positioning structure for supporting and positioning the brake base plate. The upper wall of the clamping body (1) and located on the left and right sides of the boss (101) are provided with a pressing structure for pressing the brake base plate. The rear wall of the boss (101) is provided with a rear positioning structure for pressing the brake base plate from the rear. The upper wall of the boss (101) and near the center position is provided with a moving positioning module (5) for radial positioning of the brake base plate. The upper wall of the boss (101) and near the front wall is provided with an anti-rotation structure for limiting the rotational freedom of the brake base plate.

2. The hydraulic clamp for machining brake base plates for export vehicles according to claim 1, characterized in that: The planar support positioning structure includes three sets of first positioning support plates (7) and one set of second positioning support plates (8). The three sets of first positioning support plates (7) and one set of second positioning support plates (8) are all fixedly connected to the upper wall of the boss (101). The three sets of first positioning support plates (7) are close to the left side wall, rear wall and right side wall of the boss (101) respectively. The second positioning support plate (8) is close to the front wall of the boss (101). When the clamping body (1) clamps the brake base plate, it performs planar support positioning through the three sets of first positioning support plates (7) and one set of second positioning support plates (8).

3. The hydraulic clamp for machining brake base plates for export vehicles according to claim 2, characterized in that: The clamping structure includes two sets of corner cylinder modules (2). Both sets of corner cylinder modules (2) are fixedly connected to the upper wall of the clamping body (1) and are located on the left and right sides of the boss (101). A set of wide head pressure plates (201) are fixedly connected to the end of the drive shaft of both sets of corner cylinder modules (2). The opposite ends of the two sets of wide head pressure plates (201) extend towards the center of the boss (101) in the left and right direction.

4. The hydraulic clamp for machining brake base plates for export vehicles according to claim 3, characterized in that: The rear positioning structure includes a linear push cylinder module (3) and a linear pressure plate (301). The linear push cylinder module (3) is mounted on the rear wall of the boss (101) via a fixed seat. The fixed seat is fixedly connected to the rear wall of the boss (101). The linear push cylinder module (3) is fixedly connected to the front wall of the fixed seat and located above the boss (101). The linear pressure plate (301) is rotatably connected to the end of the drive shaft of the linear push cylinder module (3).

5. A hydraulic clamp for machining brake base plates for export vehicles according to claim 4, characterized in that: The mobile positioning module (5) consists of a positioning disk (501) and a positioning sleeve (502). The positioning sleeve (502) is rotatably connected to the upper wall of the boss (101) by a pin, and the positioning disk (501) is slidably connected to the outer wall of the positioning sleeve (502).

6. The hydraulic clamp for machining brake base plates for export vehicles according to claim 5, characterized in that: The anti-rotation structure includes an anti-rotation positioning pin module (6) and an elastic pressure component (4). The anti-rotation positioning pin module (6) and the elastic pressure component (4) are arranged in a left-right distribution and are fixedly connected to the upper wall of the boss (101), and are both close to the front wall of the boss (101). The anti-rotation positioning pin module (6) and the elastic pressure component (4) are respectively provided with an anti-rotation screw (601) and a clamping screw (401) on opposite sides. The anti-rotation screw (601) and the clamping screw (401) are collinear.

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