Automobile energy absorption box processing clamp

Abstract

The utility model discloses an automobile energy absorption box processing clamp relates to automobile energy absorption box processing technical field, including base, L type side plate and workpiece positioning plate, and L type side plate is connected clamping device through first air cylinder, and clamping device is composed by drive mechanism and executive mechanism, and the centripetal synchronous movement of multiple clamping rods is realized through the closed loop transmission of steel wire rope, and the diagonal locating pin cooperation double limiting boss of workpiece positioning plate ensures workpiece positioning accuracy, and the design of guide pulley and gyro wheel promotes transmission efficiency and motion stability, the utility model solves the problem that traditional clamp is not stable to the special-shaped energy absorption box clamping, the space interference, has the characteristics such as clamping uniform, small space occupation, high welding efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automotive energy-absorbing box processing technology, and in particular to an automotive energy-absorbing box processing fixture. Background Technology

[0002] Automotive energy-absorbing boxes are usually installed together with the longitudinal beams of the vehicle. Since the energy-absorbing boxes are mostly integrally molded, they need to be connected to the longitudinal beams of the vehicle through a base plate. Therefore, a welding process is required for the energy-absorbing boxes. During the welding process, the energy-absorbing boxes and the base plate need to be fixed.

[0003] To meet the needs of collapsible energy absorption and the installation of other automotive components, automotive energy-absorbing boxes are increasingly characterized by irregular contours. This makes it difficult for traditional universal clamps, such as vises and spring clamps, to fully fit the complex sides of the energy-absorbing box and achieve stable clamping. While using multiple universal clamps in combination can partially solve the clamping problem, it leads to a more complex overall structure, significantly increases the space occupied, and severely interferes with the movement path of the laser welding torch. This results in frequent situations during the welding process where the welding torch has to avoid obstacles and reposition itself, which not only significantly reduces production efficiency but also greatly increases production and time costs.

[0004] Therefore, it is necessary to develop an energy-absorbing box that can clamp irregular contours, while simultaneously meeting the requirement of small footprint during the welding process of the energy-absorbing box, and providing sufficient movement space for the laser welding gun to improve welding efficiency. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this utility model is to provide a processing fixture for automotive energy-absorbing boxes, which can clamp irregularly shaped energy-absorbing boxes during the welding process while reducing the area occupied.

[0006] The technical solution of this utility model is as follows:

[0007] A car energy-absorbing box processing fixture includes a base, an L-shaped side plate on one side of the base, a workpiece positioning plate on the base for supporting the car energy-absorbing box to be processed, a first cylinder on the horizontal plate of the L-shaped side plate, and a clamping device connected to the piston rod of the first cylinder, the clamping device including a driving mechanism and a holding mechanism.

[0008] The holding mechanism includes a steel wire rope and a pressure plate. The pressure plate has multiple radially distributed grooves spaced circumferentially. Each groove has a clamping rod inserted into it. The clamping rod is connected to the inner wall of the centrifugal end of the groove through an elastic reset member. When no external force is applied, the elastic reset member keeps the clamping rod in its initial position. The steel wire rope winds around each clamping rod to form a closed-loop transmission structure, providing a power transmission path for the movement of the clamping rod.

[0009] The drive structure includes a second cylinder, which is slidably mounted on the vertical plate of the L-shaped side plate. The piston rod of the second cylinder is connected to a rack. A gear that meshes with the rack is rotatably mounted on the pressure plate. A reel for winding the wire rope is coaxially connected to the gear. The extension and retraction of the second cylinder drives the rack to move, thereby driving the gear to rotate, thus enabling the reel to wind up and unwind the wire rope.

[0010] Furthermore, the workpiece positioning plate is provided with two positioning pins, which are respectively set at diagonal positions on the workpiece positioning plate to form a diagonal constraint structure. This structure can position the bottom plate of the energy-absorbing box placed on the workpiece positioning plate, restricting its movement and rotation on the plane and ensuring processing accuracy.

[0011] Furthermore, each clamping rod has a double limiting boss at the point where it passes through the pressure plate. These bosses act as limiting parts, abutting against the two sides of the pressure plate to prevent the clamping rod from sliding out axially or swinging radially, thus ensuring the stability and accuracy of the clamping rod during movement. Each clamping rod has a guide wheel that rotates coaxially above the double limiting bosses. The guide wheel has an annular groove on its outer circumference. The wire rope wraps around the annular groove to form a rolling contact pair. This design reduces friction between the wire rope and the clamping rod, improves power transmission efficiency, and helps to achieve centripetal tension transmission during closed-loop wire rope transmission.

[0012] Furthermore, the pressure plate is provided with guide posts. One end of the wire rope is fixed to the reel, and the other end is wound around each of the clamping rods and then fixed to the guide posts to form a closed-loop transmission structure. The guide posts are used to limit the end fixing point of the wire rope to ensure the stability of the winding path of the wire rope.

[0013] Furthermore, a vertical groove is provided on the vertical plate of the L-shaped side plate, and a mounting bracket is slidably connected in the groove. The second cylinder is horizontally mounted on the mounting bracket, and rollers are provided on both sides of the mounting bracket. The rollers roll and abut against the side wall of the groove. This design makes the mounting bracket slide more smoothly in the groove and reduces friction.

[0014] Furthermore, the pressure plate and the mounting frame are connected by a connecting rod, which is connected to the free end of the piston rod of the first cylinder, forming a system where the first cylinder drives the clamping device to move vertically along the slide groove.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This utility model uses a circumferentially and centripetally distributed clamping rod and a wire rope closed-loop transmission structure to simultaneously apply uniform clamping force to the polygonal irregular side of the energy-absorbing box, solving the problem that traditional clamps cannot fit irregular curved surfaces and avoiding positional displacement caused by workpiece slippage during welding; the double limiting bosses restrict the swing of the clamping rods, further ensuring clamping accuracy.

[0017] 2. This utility model adopts a compact transmission chain of cylinder-gear-wire rope, which greatly reduces the space occupied compared with the multi-clamp combination structure, reserves sufficient circumferential movement space for laser welding gun, eliminates the need for welding gun to avoid obstacles, and realizes continuous welding operation.

[0018] 3. The first cylinder of this utility model drives the clamping device to lift vertically, and combined with the centripetal adaptive adjustment of the clamping rod, it can be compatible with automotive energy-absorbing boxes of different heights and sizes. No core components need to be replaced; multiple workpiece models can be adapted with only minor adjustments, reducing equipment investment costs for enterprises and improving the flexibility of fixture use.

[0019] 4. The guide wheel and the wire rope of this utility model form a rolling contact pair, which, together with the precise transmission of the gear and rack, reduces friction loss and power attenuation; the elastic reset component and the closed-loop wire rope structure realize automatic reset of clamping and releasing, reducing wear of mechanical parts, extending the service life of the clamp, and reducing the frequency of maintenance. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the installation structure of the clamping device of this utility model.

[0022] Figure 3 This is a schematic diagram of the installation structure of the holding mechanism and the driving mechanism of this utility model.

[0023] Figure 4 This is a schematic diagram of the holding mechanism structure of this utility model.

[0024] Figure 5 This is a schematic diagram of the clamping rod structure of this utility model.

[0025] Figure 6 This is a schematic diagram of the installation structure of the base, L-shaped side plate, and workpiece positioning plate of this utility model.

[0026] Reference numerals: 1. Base; 2. L-shaped side plate; 3. Workpiece positioning plate; 3-1. Positioning pin; 4. Automotive energy-absorbing box; 5. First cylinder; 6. Drive mechanism; 6-1. Second cylinder; 6-2. Rack; 6-3. Gear; 6-3.1. Reel; 6-4. Mounting bracket; 6-4.1. Roller; 7. Holding mechanism; 7-1. Wire rope; 7-2. Pressure plate; 7-2.1. Slide groove; 7-2.2. Guide post; 7-3. Clamping rod; 7-3.1. Limiting boss; 7-3.2. Guide wheel; 7-4. Elastic reset component; 8. Connecting rod. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] like Figure 1-6 As shown, a car energy-absorbing box processing fixture includes a base 1, an L-shaped side plate 2 on one side of the base 1, a workpiece positioning plate 3 on the base 1 for supporting the car energy-absorbing box 4 to be processed, a first cylinder 5 on the horizontal plate of the L-shaped side plate 2, and a clamping device connected to the piston rod of the first cylinder 5. The clamping device includes a drive mechanism 6 and a holding mechanism 7.

[0029] The holding mechanism 7 includes a wire rope 7-1 and a pressure plate 7-2. The pressure plate 7-2 has multiple radially distributed grooves 7-2.1 spaced along its circumference. Each groove 7-2.1 has a clamping rod 7-3 inserted into it. The clamping rod 7-3 is connected to the inner wall of the centrifugal end of the groove 7-2.1 through an elastic reset member 7-4. When no external force is applied, the elastic reset member 7-4 keeps the clamping rod 7-3 in its initial position. The wire rope 7-1 winds around each clamping rod 7-3 to form a closed-loop transmission structure, providing a power transmission path for the movement of the clamping rod 7-3.

[0030] The drive structure includes a second cylinder 6-1, which is slidably mounted on the vertical plate of the L-shaped side plate 2. The piston rod of the second cylinder 6-1 is connected to a rack 6-2. A gear 6-3 that meshes with the rack 6-2 is rotatably mounted on the pressure plate 7-2. A reel 6-3.1 for winding the wire rope 7-1 is coaxially connected to the gear 6-3. The extension and retraction of the second cylinder 6-1 drives the rack 6-2 to move, thereby driving the gear 6-3 to rotate, realizing the winding and unwinding of the wire rope 7-1 by the reel 6-3.1. The pressure plate 7-2 is provided with a support member for supporting and limiting the rack 6-2, maintaining the position and stability of the rack 6-2.

[0031] Furthermore, the workpiece positioning plate 3 is provided with two positioning pins 3-1, which are respectively set at the diagonal positions of the workpiece positioning plate 3 to form a diagonal constraint structure. This structure can position the bottom plate of the car energy-absorbing box 4 placed on the workpiece positioning plate 3, restrict its movement and rotation on the plane, and ensure processing accuracy.

[0032] Furthermore, the clamping rod 7-3 is provided with double limiting bosses 7-3.1 at the point where it passes through the pressure plate 7-2. These bosses act as limiting parts and abut against the two sides of the pressure plate 7-2. The lower limiting boss is integrally formed, and the upper limiting boss is screwed onto the clamping rod 7-3 from top to bottom. The section of the clamping rod 7-3 with the upper limiting boss is threaded. The lower limiting boss is semi-circular to avoid interfering with clamping. The double limiting bosses 7-3.1 prevent the clamping rod 7-3 from sliding out axially or swinging radially, ensuring the stability and accuracy of the clamping rod 7-3 during movement. The clamping rod 7-3 is located above the double limiting bosses 7-3.1 and is coaxially equipped with guide wheels 7-3.2. The guide wheels 7-3.2 are engaged with the clamping rod 7-3. The clamping rod 7-3 section that engages with the guide wheels 7-3.2 has a groove. The outer circumference of the guide wheels 7-3.2 has an annular groove. The wire rope 7-1 is wound around the annular groove to form a rolling contact pair. This design reduces the friction between the wire rope 7-1 and the clamping rod 7-3, improves the power transmission efficiency, and helps to realize the centripetal tension transmission when the wire rope 7-1 is in closed-loop transmission.

[0033] Furthermore, the pressure plate 7-2 is provided with a guide post 7-2.2. One end of the wire rope 7-1 is fixed to the reel 6-3.1, and the other end is wound around each clamping rod 7-3 and then fixed to the guide post 7-2.2 to form a closed-loop transmission structure. The guide post 7-2.2 is used to limit the end fixing point of the wire rope 7-1 to ensure the stability of the winding path of the wire rope 7-1.

[0034] Furthermore, a vertical groove is provided on the vertical plate of the L-shaped side plate 2, and a mounting bracket 6-4 is slidably connected in the groove. The mounting bracket 6-4 is installed from the top to the bottom of the vertical plate of the L-shaped side plate 2. The L-shaped plate has a matching mounting notch. A second cylinder 6-1 is horizontally installed on the mounting bracket 6-4. Two rollers 6-4.1 are symmetrically arranged on both sides of the mounting bracket 6-4. The rollers 6-4.1 roll against the side wall of the groove. This design makes the sliding of the mounting bracket 6-4 in the groove smoother and reduces friction.

[0035] Furthermore, the pressure plate 7-2 and the mounting bracket 6-4 are connected by a connecting rod 8, which is connected to the free end of the piston rod of the first cylinder 5, forming a system where the first cylinder 5 drives the pressure plate 7-2 and the mounting bracket 6-4 via the connecting rod 8, thereby causing the clamping device to move vertically along the slide groove.

[0036] The working principle of this utility model is as follows:

[0037] The car energy-absorbing box 4 is placed on the workpiece positioning plate 3, and its base plate position is fixed by the diagonally distributed positioning pins 3-1. Then, the energy-absorbing box 4 is placed on the base plate and initially positioned. The first cylinder 5 is started, which drives the clamping device to descend to the pressing height. Subsequently, the second cylinder 6-1 is activated, the piston rod extends and drives the rack 6-2 to move. The rack 6-2 meshes with the gear 6-3, causing the gear 6-3 to rotate, which in turn drives the coaxial reel 6-3.1 to wind up the wire rope 7-1.

[0038] Under the pull of the reel 6-3.1, the wire rope 7-1 winds around the clamping rods 7-3, causing the clamping rods 7-3 to overcome the resistance of the elastic reset member 7-4 and move radially along the radial groove 7-2.1 on the pressure plate 7-2, thereby clamping the car energy-absorbing box 4. During this process, the guide wheel 7-3.2 rotates synchronously under the drive of the wire rope 7-1. Its annular groove and the rolling contact pair with the wire rope 7-1 effectively reduce friction and ensure uniform transmission of clamping force. The double limiting boss 7-3.1 restricts the movement range of the clamping rods 7-3, preventing them from slipping out or swinging, and ensuring the stability of clamping.

[0039] After processing is completed, the piston rod of the second cylinder 6-1 retracts, the reel 6-3.1 releases the wire rope 7-1, and under the action of the elastic reset member 7-4, the clamping rod 7-3 moves centrifugally along the slide groove 7-2.1, releasing the automotive energy-absorbing box 4. Finally, the first cylinder 5 drives the clamping device to rise and reset, so as to perform the next clamping operation.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A machining fixture for an automotive energy-absorbing box, comprising a base, an L-shaped side plate on one side of the base, a workpiece positioning plate on the base, and a first cylinder on the horizontal plate of the L-shaped side plate, characterized in that... The piston rod of the first cylinder is connected to a clamping device, which includes a driving mechanism and a holding mechanism. The holding mechanism includes a steel wire rope and a pressure plate. The pressure plate has multiple radially distributed grooves spaced along the circumference. Each groove is equipped with a clamping rod. The clamping rod is connected to the inner wall of the centrifugal end of the groove through an elastic reset member. The steel wire rope passes through each clamping rod to form a closed-loop transmission structure. The driving mechanism includes a second cylinder, which is slidably mounted on the vertical plate of the L-shaped side plate. The piston rod of the second cylinder is connected to a rack. A gear that meshes with the rack is rotatably mounted on the pressure plate. A reel for winding the wire rope is coaxially connected to the gear.

2. The automotive energy-absorbing box processing fixture according to claim 1, characterized in that, The workpiece positioning plate is provided with two positioning pins, which are respectively set at opposite corners of the workpiece positioning plate to form a diagonal constraint structure.

3. The automotive energy-absorbing box processing fixture according to claim 1, characterized in that, The clamping rods are provided with double limiting bosses at the points where they pass through the pressure plate. These bosses act as limiting parts that abut against the two sides of the pressure plate, preventing the clamping rods from sliding out axially or swinging radially.

4. The automotive energy-absorbing box processing fixture according to claim 3, characterized in that, The clamping rods are coaxially rotatable above the double limiting bosses and are equipped with guide wheels. The guide wheels have annular grooves on their outer circumferences. The wire ropes are wound around the annular grooves to form a rolling contact pair, so as to realize the centripetal tension transmission during the closed-loop transmission of the wire ropes.

5. A machining fixture for an automotive energy-absorbing box according to claim 1, characterized in that, The pressure plate is provided with guide posts. One end of the wire rope is fixed to the reel, and the other end is wound around each of the clamping rods and then fixed to the guide posts to form a closed-loop transmission structure. The guide posts are used to define the end fixing point of the wire rope.

6. The automotive energy-absorbing box processing fixture according to claim 1, characterized in that, The vertical plate of the L-shaped side plate has a vertical groove, and a mounting bracket is slidably connected in the groove. The second cylinder is horizontally mounted on the mounting bracket, and rollers are provided on both sides of the mounting bracket. The rollers roll and abut against the side wall of the groove.

7. A machining fixture for an automotive energy-absorbing box according to claim 6, characterized in that, The pressure plate and the mounting frame are connected by a connecting rod, which is connected to the free end of the piston rod of the first cylinder. This forms a system where the first cylinder drives the clamping device to move vertically along the slide groove, and the transmission of power from the first cylinder to the pressure plate and the mounting frame is transmitted through the connecting rod.

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