A hydraulic clamp special for machining axle housing assembly

Abstract

A kind of hydraulic fixture special for axle housing assembly processing, including installation base, the upper end face of the installation base is provided with clamp device on left and right sides, the inner side of clamp device is provided with V-shaped support seat, the upper end face of installation base is provided with pressure support device in the center, the clamp device includes single-double tire switching mechanism, single-double tire switching valve and double-tire clamp mechanism and single-tire clamp mechanism provided on the upper end face of single-double tire switching mechanism, the lower end of single-double tire switching mechanism is slidably connected with installation base by slide rail, the pressure support device includes mounting plate fixedly connected with installation base, the middle part of mounting plate is provided with axial support device, multiple pressure devices and lateral support devices are provided on the two sides of axial support device, the both ends of workpiece are clamped by clamp device, and the middle part of workpiece is supported and pressed by pressure support device.

Description

Technical Field

[0001] This invention relates to the field of automotive rear axle housing processing technology, specifically to a special hydraulic fixture for processing axle housing assemblies. Background Technology

[0002] Drive axle products are widely used in off-road vehicles, high-end SUVs, passenger cars (mini), pickup trucks, and commercial vehicles due to their good load-bearing capacity and driving performance. Traditionally, when machining the rear axle housing assembly's center hole and the main reduction gear's transmission position, a dedicated hydraulic clamping mechanism needs to be designed for single-tire and dual-tire rear axle products. This mechanism, controlled by a PLC, levels the reinforcing ring plane and positions the left and right connecting discs / wheel hub tubes. The intermediate mechanism then clamps the assembly, and machining is performed using a special machine or vertical machining center. However, because the market demand for drive axle products is diverse but the quantity of individual products is small, the rear axle housing assembly's center height is 35~52.5mm, and the hole diameter is Ø145~Ø 235mm, with a central hole support positioning range of Ø180~Ø320mm, and left and right positioning references divided into inner hole and outer diameter dimensions of Ø40~Ø90mm (connecting disc and wheel hub tube structure). Traditional dedicated hydraulic fixtures cannot adapt to the positioning and main reduction connecting hole size processing of single tire (connecting disc) / double tire (wheel hub tube) structures with multiple varieties, multiple structures, multiple supports, multiple quantities and different specifications. This results in high investment costs for dedicated hydraulic fixtures, approximately 150,000 RMB per set. Currently, with 10 machining centers, at least 20 sets of dedicated hydraulic fixtures are required. Furthermore, changeover is complex, and ineffective operation time within the line is long. Changeover and debugging time is approximately 7 hours per instance. The existing production line structure cannot meet market demand plans. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a dedicated hydraulic fixture for machining axle housing assemblies. This hydraulic fixture can achieve one-time clamping of all rear axle housing assemblies, completing the positioning of both ends of single-ticket and dual-ticket axle housings, alignment of the reinforcing ring plane, side support of the center hole, bottom support of the back cover, and clamping of the reinforcing ring plane.

[0004] The objective of this invention is achieved through the following solution: a hydraulic fixture for machining axle housing assemblies, comprising a mounting base, clamping devices on the left and right sides of the upper end face of the mounting base, a V-shaped support seat on the inner side of the clamping devices, and a clamping support device at the center of the upper end face of the mounting base. The clamping devices include a single / double tire switching mechanism, a single / double tire switching valve, and a double tire clamping mechanism and a single tire clamping mechanism on the upper end face of the single / double tire switching mechanism. The lower end of the single / double tire switching mechanism is slidably connected to the mounting base via a slide rail. The clamping support device includes a mounting plate fixedly connected to the mounting base, an axial support device in the middle of the mounting plate, and multiple clamping devices and lateral support devices on both sides of the axial support device. The two ends of the workpiece are clamped by the clamping devices, and the middle of the workpiece is supported and clamped by the clamping support device.

[0005] The single / dual tire switching mechanism includes a housing with a switching positioning reference hole on the upper surface of the housing. A switching screw is installed in the housing and is perpendicular to the slide rail. The front and rear ends of the switching screw are connected to the front and rear ends of the housing. A switching handwheel is provided at the rear end of the switching screw. A switching nut is connected and fixed to the switching screw. The upper end of the switching nut is connected and fixed to the mounting base plate. A dual tire clamping mechanism and a single tire clamping mechanism are provided on the upper surface of the mounting base plate.

[0006] The single / dual tire switching includes a switching cylinder at the bottom, and a switching handle is provided at the upper end of the switching cylinder.

[0007] The dual-tire clamping mechanism includes a dual-tire clamping cylinder, which is connected to the switching cylinder of the single / dual-tire switching valve via an oil passage. The telescopic rod of the dual-tire clamping cylinder is fixedly connected to the connecting block. The front end of the connecting block is fixedly connected to the V-shaped pressure block. A V-shaped support block is provided below the V-shaped pressure block. The two sides of the dual-tire workpiece are positioned between the V-shaped pressure block and the V-shaped support block.

[0008] The single-tire clamping mechanism includes a single-tire clamping cylinder, which is connected to the switching cylinder of the single / double tire switching valve through an oil passage. The telescopic rod of the single-tire clamping cylinder is connected to one end of the piston, and the other end of the piston is connected and fixed to the positioning mandrel.

[0009] The V-shaped support includes a support base, and a V-shaped block is provided on the upper surface of the support base to support the workpiece.

[0010] The axial support device includes an axial support base, with multiple axial support columns provided on the upper end face of the axial support base, and an axial support device provided on the left and right sides of the upper end face of the mounting plate.

[0011] The clamping device includes a clamping cylinder, the telescopic rod of which is connected to a tilting arm. The upper end of the tilting arm is connected and fixed to a clamping plate. The front end of the clamping plate is connected and fixed to a clamping column. The clamping column clamps the workpiece. The lateral support device includes a lateral support base. A lateral support cylinder is installed on the lateral support base. The lateral support cylinder is connected and fixed to a lateral support column. The lateral support column supports the side of the middle part of the workpiece.

[0012] The axial support device is provided with three lateral support devices on the front and rear sides respectively. The three lateral support devices on the front and rear sides are symmetrical to each other, and a clamping device is provided on both sides of each of the three lateral support devices.

[0013] The mounting plate and the mounting base are both equipped with screw connecting seats in the middle of their left and right sides. The front end of a displacement screw passes through the housing and the support base and connects to the screw connecting seat on the side of the mounting plate. The rear end of the displacement screw connects to the screw connecting seat on the side of the mounting base. A handwheel is provided at the rear end of the displacement screw. The displacement screw is positioned below the switching screw and parallel to the slide rail. The displacement nut is connected and fixed to the displacement screw. The side of the displacement nut is connected and fixed to the side of the housing. Rotating the displacement screw drives the clamping device to move.

[0014] The advantages of this invention are: this hydraulic clamp can achieve one-time clamping of all rear axle housing assemblies, and by switching the clamp, it can complete the positioning of both ends of single-tired and double-tired axle housings, the alignment of the reinforcing ring plane, the side support of the central hole, the bottom support of the back cover, and the pressing of the reinforcing ring plane; and by adjusting the position of the clamp, workpieces of different specifications can be clamped. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a side view of the present invention; Figure 4 This is a schematic diagram of the single / double tire switching mechanism. Figure 5 This is a schematic diagram of clamping a workpiece. Detailed Implementation

[0016] like Figures 1 to 5As shown, a hydraulic fixture for machining axle housing assemblies includes a mounting base 1. Clamping devices are arranged on the left and right sides of the upper end face of the mounting base 1. A V-shaped support seat 6 is arranged inside the clamping devices. The V-shaped support seat 6 includes a support base 6-1, and a V-shaped block 6-2 is arranged on the upper end face of the support base 6-1 to support the workpiece. A clamping support device is arranged in the center of the upper end face of the mounting base 1. The clamping devices include a single / double tire switching mechanism 8, a single / double tire switching valve 13, and a double tire clamping mechanism 2 and a single tire clamping mechanism 7 arranged on the upper end face of the single / double tire switching mechanism 8. The single / double tire switching valve 13 includes a switching cylinder at the bottom, and a switching handle is arranged at the upper end of the switching cylinder. The single / dual tire switching mechanism 8 includes a housing 8-5, with a switching positioning reference hole on the upper surface of the housing 8-5. A switching screw 8-3 is installed in the housing 8-5, and the switching screw 8-3 is perpendicular to the slide rail 9. The front and rear ends of the switching screw 8-3 are connected to the front and rear ends of the housing 8-5. A switching handwheel 8-2 is provided at the rear end of the switching screw 8-3. A switching nut 8-4 is connected and fixed to the switching screw 8-3. The upper end of the switching nut 8-4 is connected and fixed to the mounting base plate 8-1. A dual tire clamping mechanism 2 and a single tire clamping mechanism 7 are provided on the upper surface of the mounting base plate 8-1. The dual-tire clamping mechanism 2 includes a dual-tire clamping cylinder 2-1, which is connected to the switching cylinder of the single / dual-tire switching valve 13 via an oil passage. The telescopic rod of the dual-tire clamping cylinder 2-1 is fixedly connected to the connecting block 2-2. The front end of the connecting block 2-2 is fixedly connected to the V-shaped pressure block 2-3. A V-shaped support block 2-4 is provided below the V-shaped pressure block 2-3. The two sides of the dual-tire workpiece are positioned between the V-shaped pressure block 2-3 and the V-shaped support block 2-4. The single-tire clamping mechanism 7 includes a single-tire clamping cylinder 7-1, which is connected to the switching cylinder of the single / dual-tire switching valve 13 via an oil passage. The telescopic rod of the single-tire clamping cylinder 7-1 is connected to one end of the piston 7-2, and the other end of the piston 7-2 is fixedly connected to the positioning mandrel 7-3. The lower end of the single / dual tire switching mechanism 8 is slidably connected to the mounting base 1 via a slide rail 9. The clamping support device includes a mounting plate 14 that is fixedly connected to the mounting base 1. An axial support device 5 is provided in the middle of the mounting plate 14. The axial support device 5 includes an axial support base 5-1. Multiple axial support columns 5-2 are provided on the upper surface of the axial support base 5-1. An axial support device 5 is provided on the left and right sides of the upper surface of the mounting plate. Multiple clamping devices 3 and lateral support devices 4 are provided on both sides of the axial support device 5. The clamping device 3 includes a clamping cylinder 3-1. The telescopic rod of the clamping cylinder 3-1 is connected to the flipping pressure arm 3-3. The upper end of the flipping pressure arm 3-3 is connected and fixed to the clamping plate 3-2. The front end of the clamping plate 3-2 is connected and fixed to the clamping column 3-4. The clamping column 3-4 clamps the workpiece. The lateral support device 4 includes a lateral support base. A lateral support cylinder 4-1 is provided on the lateral support base. The lateral support cylinder 4-1 is connected and fixed to the lateral support column 4-2. The lateral support column 4-2 supports the side of the middle part of the workpiece.Three lateral support devices 4 are respectively provided on the front and rear sides of the axial support device 5. The three lateral support devices 4 are symmetrical to each other. A clamping device 3 is provided on each side of the three lateral support devices 4. The two ends of the workpiece are clamped by the clamping device, and the middle of the workpiece is supported and clamped by the clamping support device. The left and right sides of the mounting plate 14 are provided with screw connecting seats 12. The left and right sides of the mounting base 1 are provided with screw connecting seats 12. The front end of a displacement screw 11 passes through the housing 8-5 and the support base 6-1 and is connected to the screw connecting seat 12 on the side of the mounting plate 14. The rear end of the displacement screw 11 is connected to the screw connecting seat 12 on the side of the mounting base 1. A handwheel is provided at the rear end of the displacement screw 11. The displacement screw 11 is located below the switching screw 8-3 and parallel to the slide rail 9. The displacement nut 10 is connected and fixed to the displacement screw 11. The side of the displacement nut 10 is connected and fixed to the side of the housing 8-5. The clamping device is moved by rotating the displacement screw 11.

[0017] Different clamping fixtures are required to clamp different workpieces. When clamping a single-feed workpiece, the fixture needs to be switched to the single-feed clamping mechanism 7. When clamping a double-feed workpiece, the fixture needs to be switched to the double-feed clamping mechanism 2.

[0018] The following is the fixture switching process: Rotating the switching handwheel 8-2 causes the switching nut 8-4 on the switching screw 8-3 to move the mounting base plate 8-1. After the movement, rotating the handle of the single / double tire switching valve controls the connection between the switching cylinder and the double tire fixture cylinder 2-1 and the single tire fixture cylinder 7-1. The single / double tire fixture is then moved to the required position to clamp both ends of the workpiece. The axial support device 5, the lateral support device 4, and the clamping device 3 support and clamp the middle of the workpiece. When clamping workpieces of different specifications, the displacement handwheel can be rotated to adjust the displacement screw 11, causing the entire fixture device to move and clamp both ends of the workpiece.

[0019] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. A hydraulic fixture for machining axle housing assembly, comprising a mounting base (1), characterized in that: The mounting base (1) has clamping devices on the left and right sides of its upper end face. A V-shaped support seat (6) is provided on the inner side of the clamping device. A pressing support device is provided in the center of the upper end face of the mounting base (1). The clamping device includes a single / double tire switching mechanism (8), a single / double tire switching valve (13), and a double tire clamping mechanism (2) and a single tire clamping mechanism (7) provided on the upper end face of the single / double tire switching mechanism (8). The lower end of the single / double tire switching mechanism (8) is slidably connected to the mounting base (1) via a slide rail (9). The pressing support device includes a mounting plate (14) that is fixed to the mounting base (1). An axial support device (5) is provided in the middle of the mounting plate (14). Multiple pressing devices (3) and lateral support devices (4) are provided on both sides of the axial support device (5). The two ends of the workpiece are clamped by the clamping device, and the middle of the workpiece is supported and pressed by the pressing support device.

2. The hydraulic fixture for machining axle housing assembly according to claim 1, characterized in that: The single / dual tire switching mechanism (8) includes a housing (8-5), with a switching positioning reference hole on the upper surface of the housing (8-5). A switching screw (8-3) is installed in the housing (8-5), and the switching screw (8-3) is perpendicular to the slide rail (9). The front and rear ends of the switching screw (8-3) are connected to the front and rear ends of the housing (8-5). A switching handwheel (8-2) is provided at the rear end of the switching screw (8-3). A switching nut (8-4) is connected and fixed to the switching screw (8-3). The upper end of the switching nut (8-4) is connected and fixed to the mounting base plate (8-1). A dual tire clamping mechanism (2) and a single tire clamping mechanism (7) are provided on the upper surface of the mounting base plate (8-1).

3. The hydraulic fixture for machining axle housing assembly according to claim 1, characterized in that: The single / double tire switching (13) includes a switching cylinder at the bottom, and a switching handle is provided at the upper end of the switching cylinder.

4. The hydraulic fixture for machining axle housing assembly according to claim 1, characterized in that: The dual-tire clamping mechanism (2) includes a dual-tire clamping cylinder (2-1). The dual-tire clamping cylinder (2-1) is connected to the switching cylinder of the single / dual-tire switching valve (13) through an oil passage. The telescopic rod of the dual-tire clamping cylinder (2-1) is connected and fixed to the connecting block (2-2). The front end of the connecting block (2-2) is connected and fixed to the V-shaped pressure block (2-3). A V-shaped support block (2-4) is set below the V-shaped pressure block (2-3). The two sides of the dual-tire workpiece are set between the V-shaped pressure block (2-3) and the V-shaped support block (2-4).

5. The hydraulic fixture for machining axle housing assembly according to claim 1, characterized in that: The single-tire clamping mechanism (7) includes a single-tire clamping cylinder (7-1). The single-tire clamping cylinder (7-1) is connected to the switching cylinder of the single / double tire switching valve (13) through an oil passage. The telescopic rod of the single-tire clamping cylinder (7-1) is connected to one end of the piston (7-2), and the other end of the piston (7-2) is connected and fixed to the positioning spindle (7-3).

6. The hydraulic fixture for machining axle housing assembly according to claim 1, characterized in that: The V-shaped support (6) includes a support base (6-1), and a V-shaped block (6-2) is provided on the upper surface of the support base (6-1) to support the workpiece.

7. The hydraulic fixture for machining axle housing assembly according to claim 1, characterized in that: The axial support device (5) includes an axial support base (5-1), a plurality of axial support columns (5-2) are provided on the upper end face of the axial support base (5-1), and an axial support device (5) is provided on the left and right sides of the upper end face of the mounting plate.

8. The hydraulic fixture for machining axle housing assembly according to claim 1, characterized in that: The clamping device (3) includes a clamping cylinder (3-1), the telescopic rod of the clamping cylinder (3-1) is connected to the flipping pressure arm (3-3), the upper end of the flipping pressure arm (3-3) is connected and fixed to the clamping plate (3-2), the front end of the clamping plate (3-2) is connected and fixed to the clamping column (3-4), and the clamping column (3-4) clamps the workpiece. The lateral support device (4) includes a lateral support base, a lateral support cylinder (4-1) is provided on the lateral support base, the lateral support cylinder (4-1) is connected and fixed to the lateral support column (4-2), and the lateral support column (4-2) supports the side of the middle part of the workpiece.

9. The hydraulic fixture for machining axle housing assembly according to claim 7, characterized in that: The axial support device (5) is provided with three lateral support devices (4) on the front and rear sides respectively. The three lateral support devices (4) on the front and rear sides are symmetrical to each other. A clamping device (3) is provided on each side of the three lateral support devices (4).

10. The hydraulic fixture for machining axle housing assembly according to claim 1, characterized in that: The mounting plate (14) is provided with a screw connecting seat (12) in the middle of the left and right sides. The mounting base (1) is provided with a screw connecting seat (12) in the middle of the left and right sides. The front end of a displacement screw (11) passes through the box (8-5) and the support base (6-1) and is connected to the screw connecting seat (12) on the side of the mounting plate (14). The rear end of the displacement screw (11) is connected to the screw connecting seat (12) on the side of the mounting base (1). A handwheel is provided at the rear end of the displacement screw (11). The displacement screw (11) is located below the switching screw (8-3) and parallel to the slide rail (9). The displacement nut (10) is connected and fixed to the displacement screw (11). The side of the displacement nut (10) is connected and fixed to the side of the box (8-5). The clamping device is moved by rotating the displacement screw (11).

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