A lower frame clamping device

Abstract

This utility model relates to the field of undercarriage clamping technology and discloses an undercarriage clamping device, including: a clamping seat, a hydraulic cylinder fixedly mounted on the top of the clamping seat, buffer rods provided at the four corners of the telescopic rod of the hydraulic cylinder, a connecting round seat fixedly mounted at the bottom of the telescopic rod and the buffer rods, a clamping assembly provided below the connecting round seat, the connecting round seat and the clamping assembly being fixedly connected by bolts, the top of the clamping seat being an L-shaped curved column, the clamping seat being used to provide support for the clamping assembly, the hydraulic cylinder being used to control the lifting and lowering of the clamping assembly, the buffer rods being used to provide buffering force when the clamping assembly is lifted and lowered under the action of the hydraulic cylinder, and the clamping assembly being used to clamp and fix the undercarriage; the clamping seat and the clamping assembly can automatically clamp and fix the undercarriage, reducing manual intervention, reducing labor costs, and thus improving transfer efficiency.

Description

Technical Field

[0001] This utility model relates to the field of underframe clamping technology, specifically to an underframe clamping device. Background Technology

[0002] In the fields of automobile manufacturing and construction machinery assembly, the underframe is a critical load-bearing component. Due to its large size and heavy weight, it requires transfer after production to be transported to the subsequent final assembly station or storage area. Currently, the industry commonly uses a traditional bundled transfer method for underframe transfer.

[0003] Specifically, existing undercarriage clamping devices typically involve first using multiple sets of chains to manually wrap and bind the undercarriage, ensuring that the chains can securely restrain the undercarriage. Then, a crane hook is used to hook the chain connection point, and the crane lifts the bound undercarriage. The crane is then moved above the transport vehicle, and the undercarriage is slowly lowered until it is placed on the transport vehicle for unloading.

[0004] However, this method of transportation relying on multiple sets of chain bindings has significant drawbacks. Firstly, it is extremely labor-intensive. The entire binding process requires multiple workers to work together, not only precisely adjusting the chain winding position but also repeatedly checking the binding's security to prevent the undercarriage from loosening during lifting. This undoubtedly increases labor costs significantly and prolongs preparation time before transportation. Secondly, it poses extremely poor safety risks. Chains are prone to wear and corrosion over long-term use. If these issues are not detected in time, the chain may break during the lifting of the undercarriage, causing it to fall, damaging the equipment, or even leading to a serious safety accident. Furthermore, manual binding makes it difficult to ensure even chain stress. The undercarriage may tilt or sway during lifting due to unbalanced forces, further increasing safety hazards and failing to meet the demands of efficient and safe transportation in modern production. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a lower frame clamping device.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A lower frame clamping device includes: a clamping seat, a hydraulic cylinder fixedly mounted on the top of the clamping seat, buffer rods provided at the four corners of the telescopic rod of the hydraulic cylinder, a connecting round seat fixedly provided at the bottom of the telescopic rod and the buffer rods, a clamping assembly provided below the connecting round seat, the connecting round seat and the clamping assembly being fixedly connected by bolts, the top of the clamping seat being an L-shaped curved column, the clamping seat being used to provide support for the clamping assembly, the hydraulic cylinder being used to control the lifting and lowering of the clamping assembly, the buffer rods being used to provide buffering force when the clamping assembly is lifted and lowered under the action of the hydraulic cylinder, and the clamping assembly being used to clamp and fix the lower frame.

[0008] Preferably, the clamping assembly includes: a connecting top plate, with supporting side beams 1 fixedly installed on the left and right sides of the bottom of the connecting top plate by bolts, supporting side beams 2 fixedly installed on the front and rear sides of the bottom of the supporting side beams 1, rotating shafts installed on the left and right sides of the supporting side beams 2 on the front and rear sides, arc-shaped plates movably installed on the rotating shafts, gripper discs fixedly installed at the bottom of the arc-shaped plates, pressure plates arranged laterally on the gripper discs, rotating shaft seats fixedly installed on the left and right sides of the supporting side beams 1, and hydraulic cylinders movably installed on the rotating shafts of the rotating shaft seats, with the top of the telescopic rod of the hydraulic cylinder movably connected to the top of the arc-shaped plate, and the hydraulic cylinders are used to extend and retract to drive the arc-shaped plate to rotate, clamping the lower frame between the gripper discs and pressure plates on the left and right sides.

[0009] Preferably, the gripper disc includes a horizontal plate, on which multiple sets of L-shaped bends are fixedly mounted.

[0010] Preferably, the bottom of the clamping seat is provided with multiple sets of circular threaded holes, which are used to fix the clamping seat to the plane by screws or bolts.

[0011] Compared with the prior art, the present invention provides a lower frame clamping device, which has the following advantages:

[0012] The transfer of the undercarriage is achieved through the coordinated action of the clamping seat and clamping components, eliminating the need for manual binding with multiple chains as in traditional methods. The clamping seat provides stable support for the entire device, and its L-shaped curved column structure at the top can precisely accommodate the installation of hydraulic cylinders, ensuring stable and reliable lifting and lowering of the subsequent clamping components.

[0013] The clamping assembly automatically clamps and fixes the underframe through the cooperation of the connecting top plate, supporting side beam one, supporting side beam two, arc plate, and gripper plate.

[0014] The entire process requires only a small number of staff to operate and monitor the equipment, reducing manual intervention and labor costs. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a three-dimensional structural diagram of the clamping component in this utility model;

[0017] Figure 3 This is a top view of the clamping component in this utility model.

[0018] Figure 4 This is a partial three-dimensional structural diagram of the clamping component in this utility model.

[0019] The components are: 1. Clamping seat; 2. Hydraulic cylinder; 201. Buffer rod; 202. Connecting round seat; 3. Clamping assembly; 301. Supporting side beam two; 302. Supporting side beam one; 303. Gripper plate; 304. Arc plate; 305. Rotating shaft; 306. Oil cylinder; 3061. Rotating shaft seat; 308. Pressure plate; 309. Connecting top plate; 101. Circular threaded hole. Detailed Implementation

[0020] 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.

[0021] Reference Figures 1-4 As shown, a vehicle frame clamping device according to this embodiment includes a clamping seat. The bottom of the clamping seat is provided with multiple sets of circular threaded holes. The circular threaded holes are used to fix the clamping seat to a plane such as the ground or workbench by screws or bolts. This fixing method can ensure that the clamping seat will not be displaced during subsequent clamping and lifting of the vehicle frame, providing a stable support foundation for the entire device.

[0022] The clamping seat features an L-shaped curved column at the top, with a hydraulic cylinder fixedly fitted inside the horizontal section of the L-shaped column. This fitting enhances the connection between the hydraulic cylinder and the clamping seat, preventing swaying during the lifting and lowering of the clamping assembly and ensuring stability of the lifting action. Buffer rods are located at all four corners of the hydraulic cylinder's telescopic rod. The top of each buffer rod is fixedly connected to the bottom of the hydraulic cylinder body, and the bottom is fixedly connected to the top of the connecting round seat. Simultaneously, the bottom of the hydraulic cylinder's telescopic rod is also fixedly connected to the center of the top of the connecting round seat. This symmetrically distributed buffer rod structure evenly distributes impact force during the lifting and lowering of the clamping assembly, preventing severe vibrations caused by excessive lifting speed or the weight of the lower frame, thus protecting the lower frame and device components.

[0023] A clamping assembly is located below the connecting round base. The connecting round base and the top plate of the clamping assembly are fixedly connected by multiple sets of bolts. This bolt connection method facilitates subsequent disassembly, maintenance, or replacement of the clamping assembly, reducing maintenance costs. Supporting side beams are bolted to the left and right sides of the bottom of the top plate, with the first support beams being longitudinally distributed. Supporting side beams are also bolted to the front and rear sides of the bottom of the first support beam, with the second support beams being transversely distributed. The first and second support beams form a "well"-shaped support structure, providing a stable installation foundation for subsequent components such as the curved plate and gripper disc, and enhancing the overall structural strength of the clamping assembly.

[0024] The left and right bottom sides of the second support beams on both the front and rear sides are equipped with pivots. The pivots are movably connected to the second support beams via bearings. An arc-shaped plate is fixedly fitted onto the pivot, ensuring that the arc-shaped plate can rotate flexibly around the pivot. A gripper plate is fixedly installed at the bottom of the arc-shaped plate. The gripper plate includes a horizontal plate and multiple sets of L-shaped bends fixed to the horizontal plate. The bending direction of the L-shaped bends faces the underframe, allowing for better fit with the edge contour of the underframe and improving the gripping fit. A pressure plate is horizontally installed on the horizontal plate of the gripper plate. The pressure plate is fixedly connected to the horizontal plate with bolts. The installation height of the pressure plate can be adjusted according to the thickness of the underframe to ensure that the underframe can be limited from above.

[0025] A pivot seat is fixedly installed on the left and right sides of the supporting side beam. A hydraulic cylinder is movably installed on the pivot of the pivot seat. The top of the extension rod of the hydraulic cylinder is movably connected to the top of the arc plate through a pin. This movable connection structure can adapt to the angle change when the arc plate rotates. When the hydraulic cylinder extends or retracts, it can drive the arc plate to rotate around the pivot, thereby driving the gripper disc to move and clamp the lower frame between the gripper discs and pressure plates on the left and right sides, so as to achieve a stable clamping of the lower frame.

[0026] In some examples, the buffer bar has a built-in shock-absorbing spring. The top end of the spring is fixedly connected to the inner top wall of the buffer bar, and the bottom end is fixedly connected to the top end of the telescopic rod of the buffer bar. When the clamping assembly lowers the lower frame, the telescopic rod of the buffer bar is compressed and contracts. The shock-absorbing spring is further compressed and generates a counter-elastic force, which can more effectively absorb the impact force generated during descent and reduce the vibration amplitude of the clamping assembly and the lower frame. Compared with a simple rigid buffer bar, a buffer bar with a shock-absorbing spring can adapt to lower frames of different weights, improve the adaptability of the device to lower frames of different specifications, extend the service life of the buffer bar, and reduce the frequency of component replacement.

[0027] The working principle of this utility model is as follows:

[0028] When using this undercarriage clamping device, the first step is to select a flat installation location with sufficient load-bearing capacity, based on the dimensions and specifications of the undercarriage and the surrounding environment. Place the clamping seat stably in this location and secure it to the ground, workbench, or other flat surface using screws or bolts through the multiple sets of circular threaded holes on the bottom of the clamping seat. The L-shaped curved column structure at the top of the clamping seat provides a precise installation reference for the hydraulic cylinder. The hydraulic cylinder is fitted and fixed inside the horizontal section of the L-shaped curved column, ensuring a secure connection between the hydraulic cylinder and the clamping seat, preventing wobbling during operation, and providing a stable support foundation for the entire device.

[0029] Next, the clamping assembly is assembled and tested. First, the connecting round seat and the connecting top plate of the clamping assembly are fixedly connected with multiple sets of bolts to ensure a tight connection. At the same time, the buffer rods at the four corners of the hydraulic cylinder telescopic rod are checked to confirm that the top of the buffer rod is fixed to the bottom of the hydraulic cylinder body, and the bottom end is fixed to the top of the connecting round seat. The bottom end of the hydraulic cylinder telescopic rod is reliably connected to the center position of the top of the connecting round seat, ensuring that the buffer rod can evenly distribute the impact force during subsequent lifting operations. Then, based on the thickness of the lower frame, the installation height of the pressure plate is determined by adjusting the bolt connection position between the pressure plate and the cross plate of the gripper disc, ensuring that the pressure plate can effectively limit the lower frame from above. The hydraulic cylinder on the side pivot seat of the support beam is checked to confirm that the pin connection between the top of the hydraulic cylinder telescopic rod and the top of the arc plate is flexible, ensuring that the arc plate can rotate smoothly around the pivot at the bottom of the support beam.

[0030] Once the device is installed and debugged, it can be started to clamp the lower frame. The operator sends a command to the hydraulic cylinder through the external control system. Upon receiving the signal, the hydraulic cylinder extends, and its extension rod pushes the arc-shaped plate to rotate inward around the axis, thereby causing the gripper plate at the bottom of the arc-shaped plate to move synchronously towards the lower frame. Since there are multiple sets of L-shaped bends fixed on the horizontal plate of the gripper plate, and the bending direction of the L-shaped bends is towards the lower frame, as the gripper plate moves, the L-shaped bends will gradually fit against the edge contour of the lower frame. When the gripper plate contacts the surface of the lower frame, the hydraulic cylinder continues to extend slightly until the lower frame is tightly clamped between the gripper plates and pressure plates on both sides.

[0031] After the lower frame is clamped, the operator activates the hydraulic cylinder via the control system. The cylinder's telescopic rod retracts, causing the connecting seat and the clamping assembly fixed to it to rise synchronously. During this process, the buffer rod circumferentially extending and retracts synchronously with the rising connecting seat. The shock-absorbing springs inside the buffer rod absorb the impact force generated by the weight of the lower frame and the lifting speed, reducing the vibration amplitude between the clamping assembly and the lower frame, ensuring a smooth lifting process. When the clamping assembly, carrying the lower frame, rises to the preset height, the hydraulic cylinder stops working, maintaining the current height.

[0032] At this point, drive the transport vehicle directly beneath the clamping assembly, ensuring the transport vehicle's cargo compartment is aligned with the unloading position of the lower frame. The operator sends a reverse command to the hydraulic cylinder via the control system. The cylinder's extension rod retracts, pulling the arc-shaped plate to rotate outwards around the axis. The gripper disc then moves away from the lower frame, gradually releasing its grip. Once the gripper disc is completely separated from the lower frame, activate the hydraulic cylinder, causing its extension rod to slowly extend, lowering the clamping assembly to its initial position. The lower frame then smoothly lands on the transport vehicle under gravity, completing the unloading and transfer of the lower frame.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lower frame clamping device, characterized in that, include: A clamping seat (1) is fitted with a hydraulic cylinder (2) on its top. Buffer rods (201) are provided at the four corners of the telescopic rod of the hydraulic cylinder (2). A connecting round seat (202) is fixedly provided at the bottom of the telescopic rod and the buffer rod (201) of the hydraulic cylinder (2). A clamping assembly (3) is provided below the connecting round seat (202). The connecting round seat (202) and the clamping assembly (3) are fixedly connected by bolts. The top of the clamping seat (1) is set as an L-shaped curved column. The clamping seat (1) is used to provide support for the clamping assembly (3). The hydraulic cylinder (2) is used to control the lifting and lowering of the clamping assembly (3). The buffer rods (201) are used to provide buffering force when the clamping assembly (3) is lifted and lowered under the action of the hydraulic cylinder (2). The clamping assembly (3) is used to clamp and fix the lower frame.

2. The undercarriage clamp of claim 1, wherein, The clamping assembly (3) includes: a connecting top plate (309), with supporting side beams (302) fixedly installed on the left and right sides of the bottom of the connecting top plate (309) by bolts, and supporting side beams (301) fixedly installed on the front and rear sides of the bottom of the supporting side beams (302), with rotating shafts (305) installed on the bottom of the left and right sides of the supporting side beams (301) on the front and rear sides, and arc-shaped plates (304) movably installed on the rotating shafts, with a gripper plate (303) fixedly installed at the bottom of the arc-shaped plates (304). The gripper disc (303) is horizontally provided with a pressure plate (308). A rotating shaft seat (3061) is fixedly provided on the left and right sides of the supporting side beam (302). A hydraulic cylinder (306) is movably provided on the rotating shaft of the rotating shaft seat (3061). The top of the telescopic rod of the hydraulic cylinder (306) is movably connected to the top of the arc plate (304). The hydraulic cylinder (306) is used to extend and retract to drive the arc plate (304) to rotate, clamping the lower frame between the gripper disc (303) and the pressure plate (308) on the left and right sides.

3. The undercarriage clamp of claim 1, wherein: The gripper plate (303) includes: a horizontal plate, on which multiple sets of L-shaped bends are fixedly installed.

4. The undercarriage clamp of claim 1, wherein: The bottom of the clamping seat (1) is provided with multiple sets of circular threaded holes (101), which are used to fix the clamping seat (1) on the plane by screws or bolts.

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