A mold changing vehicle with variable universal wheels

Abstract

The present invention relates to the field of mechanical processing technology, specifically a mold-changing vehicle with variable universal wheels, comprising a vehicle frame, variable universal wheels, a connecting mechanism, and a fixing mechanism. The connecting mechanism and the fixing mechanism are quickly connected to achieve quick connection between the vehicle frame and equipment. The connecting mechanism is provided with a connecting block connected to a limit buckle and a support block for disconnection, wherein the support block can be quickly operated by a single person via a first connecting rod and a second connecting rod. A plurality of variable universal wheels are provided at the bottom of the vehicle frame. The variable universal wheels can be used as both universal wheels and fixed wheels by providing limit blocks. Furthermore, the first bearing replaces an ordinary wheel, greatly reducing the rolling resistance caused by the heavy mold. By using the present invention, the efficiency and flexibility of using a mold-changing vehicle to replace molds can be greatly improved, and the labor intensity of the operator can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical processing, in particular to a die-changing vehicle with variable universal wheels. Background Art

[0002] When performing mechanical processing such as ultrasonic welding, it is often necessary to use a mold changing cart to replace the mold. Currently, mold changing carts on the market generally do not have alignment and connection mechanisms, which requires operators to spend a lot of time and physical effort to align the mold and equipment during operation. Otherwise, the mold cannot be replaced or the mold and equipment may be damaged. Mold changing carts are generally equipped with two fixed wheels and two universal wheels for easy pushing and steering. The wheels are generally made of rubber, polyurethane, PVC or nylon. For some large molds, the use of wheels made of these materials will generate greater resistance, increase the labor intensity of the operator, and are not conducive to rapid transportation and adjustment of the mold changing cart's position. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for solving the problems raised in the above background technology that cannot be solved by the existing technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a mold changing vehicle with variable universal wheels, comprising a vehicle frame, at least three variable universal wheels and a connecting mechanism disposed at the bottom of the vehicle frame, a fixing mechanism disposed on opposite sides of the connecting mechanism, and the fixing mechanism being fixedly mounted on the equipment where the mold needs to be changed;

[0005] The fixing mechanism includes a first mounting seat, a limiting clip movably mounted on the front end of the first mounting seat, and an elastic element, wherein the limiting clip is symmetrically arranged and has an inverted structure on its inner side; the elastic element is arranged between the outer side of the limiting clip and the side of the first mounting seat, and the first mounting seat is fixedly arranged on the equipment where the mold needs to be replaced.

[0006] The connecting mechanism includes a second connecting rod, a support block fixedly arranged at the front end of the second connecting rod, a second mounting seat and a connecting block fixedly arranged in front of the second mounting seat, wherein the second mounting seat is fixedly connected to the front end of the bottom of the frame, the second connecting rod is movably embedded in the second mounting seat, and the support block is located in front of the second mounting seat; the connecting block and the support block are both arranged on opposite sides of the limiting buckle, the front end of the connecting block is closer to the limiting buckle, the width of the connecting block is smaller than the width of the support block, and undercut structures are provided on the left and right sides of the front end of the connecting block to match the limiting buckle.

[0007] Preferably, the connecting block is embedded in the second mounting seat and the supporting block, wherein the rear end of the connecting block is fixedly connected to the second mounting seat, and the middle end can slide relative to the supporting block.

[0008] Preferably, a support rod is provided at the rear end of the support block, one end of the support rod is embedded in the second mounting seat and fixedly connected to the support block, and the other end extends to the rear of the second mounting seat and is provided with a spring seat; a return spring is provided on the support rod, one end of the return spring acts on the spring seat, and the other end acts on the second mounting seat.

[0009] Preferably, the other end of the second connecting rod relative to the connecting block is embedded in the third mounting seat, and the third mounting seat is fixedly arranged at the bottom of the rear end of the frame; a first connecting rod is arranged on the third mounting seat, the upper end of the first connecting rod extends to the rear of the frame, the middle part is movably mounted on the third mounting seat, and the lower end extends to the rear of the second connecting rod. When the upper end of the first connecting rod is pulled backward, its lower end acts on the second connecting rod to push the second connecting rod to move forward.

[0010] Preferably, the front ends of the connecting block and the supporting block are chamfered, and the inner side of the front end of the limit buckle is chamfered; the elastic element is a coil spring. Preferably, the inner side of the clamping arm is provided with a groove, and the two ends of the elastic element are respectively embedded in the grooves of the clamping arm on both sides.

[0011] Preferably, rollers are provided on the left and right sides of the top of the frame, and a handle is provided on the rear side of the top.

[0012] Preferably, the variable universal wheel includes a fourth mounting seat, a steering shaft, and a wheel mounting frame arranged from top to bottom, wherein the fourth mounting seat is fixedly connected to the vehicle frame; the upper end of the steering shaft is fixedly mounted on the fourth mounting seat, and the lower end is movably connected to the top of the wheel mounting frame; a first bearing is movably provided at the bottom of the wheel mounting frame, and the first bearing is in vertical contact with the ground; a limit block is provided on the side of the wheel mounting frame to limit its rotation, and the limit block is fixedly connected to the fourth mounting seat.

[0013] Preferably, the steering shaft is embedded in the top of the wheel mounting frame and is movably connected via a bearing; the first bearing is a deep groove ball bearing.

[0014] Preferably, the cross section of the limiting block is L-shaped.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the present invention realizes the rapid connection of the mold changing vehicle and the equipment through the rapid connection of the connecting mechanism and the fixing mechanism, and the movably installed limit buckle has a certain position tolerance relative to the connecting block, which can greatly improve the speed and success rate of the connection; the support block is driven by the first connecting rod and the second connecting rod, and only a single person is required to operate to achieve the connection contact, which greatly improves the production efficiency; the variable universal wheel can realize the conversion between the universal wheel and the directional wheel, which greatly improves the flexibility of the present invention during use, and by replacing the ordinary wheel with the first bearing, the rolling resistance caused by the heavy mold is greatly reduced, thereby reducing the labor intensity of the operator and improving the speed and efficiency of conveying and replacing the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the present invention from a three-dimensional perspective;

[0017] Figure 2 This is a structural schematic diagram of another three-dimensional perspective of the present invention;

[0018] Figure 3 It is a structural schematic diagram of the connection state of the connecting mechanism and the fixing mechanism in the present invention from a three-dimensional perspective;

[0019] Figure 4 A bottom view of the connection state of the connecting mechanism and the fixing mechanism in the present invention;

[0020] Figure 5 for Figure 4 Magnified view at P in the middle;

[0021] Figure 6 for Figure 4 Cross-sectional view at AA in the middle;

[0022] Figure 7 for Figure 6 Magnified view at O in the middle;

[0023] Figure 8 A schematic structural diagram of a variable universal wheel according to the present invention in a three-dimensional perspective;

[0024] Figure 9 It is a cross-sectional view of the variable universal wheel of the present invention.

[0025] In the figure: 1. frame; 2. variable universal wheel; 3. connecting mechanism; 4. fixing mechanism; 101. handle; 102. roller; 201. fourth mounting seat; 202. steering shaft; 203. limit block; 204. wheel mounting frame; 205. first bearing; 301. second mounting seat; 302. connecting block; 303. support block; 304. second connecting rod; 305. support rod; 306. spring seat; 307. return spring; 308. third mounting seat; 309. first connecting rod; 401. first mounting seat; 402. elastic element; 403. limit buckle. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The present invention provides a technical solution, a mold changing vehicle with variable universal wheels, Figure 1 and attached Figure 2 It is mainly composed of a frame 1, a variable universal wheel 2, a connecting mechanism 3 and a fixing mechanism 4, wherein the fixing mechanism 4 is arranged at the bottom of the equipment (hereinafter referred to as the equipment) that needs to replace the mold. The frame 1 is fixedly connected to the equipment through the connection between the connecting mechanism 3 and the fixing mechanism 4, thereby ensuring that the two are in a relatively stable state when replacing the mold, and can quickly perform alignment and mold replacement.

[0028] Reference Attachment Figure 3 To the attached Figure 7 The connection between the connecting mechanism 3 and the fixing mechanism 4 is primarily achieved through the undercut structures on the left and right sides of the connecting block 302 and the undercut structure on the inner side of the position-limiting buckle 403. The connecting block 302 is rigidly connected to the vehicle frame 1 via the second mounting base 301, while the position-limiting buckle 403 is connected to the device via the first mounting base 401. The position-limiting buckle 403 is movably mounted on the first mounting base 401 and, through the action of the elastic element 402, adheres to the left and right sides of the front end of the connecting block 302, achieving a stable connection between the vehicle frame 1 and the device.

[0029] The support block 303 is used to disconnect the connecting mechanism 3 from the fixing mechanism 4. The support block 303 and the connecting block 302 are located on opposite sides of the position-limiting buckle 403. The support block 303 is fixed to the front end of the second connecting rod 304. The second connecting rod 304 can slide back and forth relative to the second mounting base 301, thereby linking the support block 303 to move relative to the connecting block 302. When the connecting block 302 and the position-limiting buckle 403 are connected, the front end of the support block 303 is located behind the connection between the connecting block 302 and the position-limiting buckle 403.

[0030] When the connection between the connecting block 302 and the limiting buckle 403 needs to be released, the second connecting rod 304 is pushed forward, and the second connecting rod 304 drives the supporting block 303 to move forward. Since the width of the connecting block 302 is smaller than the width of the supporting block 303, when the front end of the supporting block 303 moves to the connection point between the connecting block 302 and the limiting buckle 403, the two ends of the supporting block 303 contact the inner side of the limiting buckle 403 and generate an outward force, causing the limiting buckle 403 to flip outward, thereby causing the connecting block 302 to disengage from the limiting buckle 403; at this time, the frame 1 is pulled backward to complete the connection release between the connecting mechanism 3 and the fixing mechanism 4.

[0031] The second connecting rod 304 is arranged at the bottom of the frame 1. To facilitate the operation of the second connecting rod 304, the other end of the second connecting rod 304 opposite to the connecting block 302 is embedded in the third mounting seat 308, and the second connecting rod 304 is driven by the first connecting rod 309 movably mounted on the third mounting seat 308.

[0032] The middle portion of the first connecting rod 309 is movably mounted on the third mounting base 308. By pulling the upper end of the first connecting rod 309, the connection point between the first connecting rod 309 and the third mounting base 308 serves as a fulcrum, and the lower end acts on the second connecting rod 304 to push the second connecting rod 304. Preferably, the length of the upper end of the first connecting rod 309 relative to the connection point can be set to be greater than the length of the upper end of the first connecting rod 309 relative to the connection point, thereby reducing the operator's labor intensity through the principle of leverage.

[0033] After the connection between the connecting mechanism 3 and the fixing mechanism 4 is released, a return spring 307 is provided at the rear end of the support block 303 to quickly reset the support block 303 and the second connecting rod 304. The return spring 307 is fitted onto the support rod 305, with one end acting on the second mounting seat 301 and the other end acting on the spring seat 306. When the operator drives the support block 303 forward via the first connecting rod 309 and the second connecting rod 304, the support rod 305 embedded in the second mounting seat 301 moves relative to the second mounting seat 301, causing the spring seat 306 and the second mounting seat 301 to compress the return spring 307. When the operator releases the first connecting rod 309, the compressed return spring 307 expands, pushing the spring seat 306 away from the second mounting seat 301, thereby pulling the support block 303 backward and driving the second connecting rod 304 to return to their original position.

[0034] During operation, the operator pushes the mold-changing cart and simply aligns the connecting block 302 of the connecting mechanism 3 with the position between the limiting buckles 403 of the fixing mechanism 4 and snaps the connecting block 302 into the limiting buckles 403 to complete the quick connection. Because the limiting buckles 403 are movably mounted on the first mounting seat, there is a certain degree of error tolerance for the position of the connecting block 302 when it is snapped into the limiting buckle 403, allowing it to smoothly snap into place and achieve connection even with certain positional deviations. After the mold change is completed, the support block can be manipulated to release the connection by operating the first connecting rod. This operation can be performed by one person, eliminating the need for multiple people to coordinate, greatly improving the efficiency of mold changes.

[0035] Preferably, the connecting block 302 is embedded within the second mounting base 301 and the support block 303, and the support block 303 can move forward and backward relative to the connecting block 302. This structural design can make the overall structure of the mechanism more compact and reduce the overall material cost of the mechanism. If the support block 303 is placed above or below the connecting block 302, although the same function can be achieved, the structure is not compact enough and the size of the limit buckle 403 needs to be increased, which increases the material cost.

[0036] Preferably, chamfers are provided on both sides of the front end of the connecting block 302 and the supporting block 303, and a chamfer is provided on the inner side of the front end of the limiting buckle 403. The provision of chamfers can help guide the connection between the connecting block 302 and the limiting buckle 403, and the supporting block 303 to open the limiting buckle 403, thereby further improving the operation success rate of the present invention during use and improving efficiency.

[0037] Reference Attachment Figure 2 , Attachment Figure 8 and attached Figure 9 Four variable universal wheels 2 are provided at the bottom of the vehicle frame 1. These wheels can function as universal wheels without the stop blocks 203, or as fixed wheels with the upper stop blocks 203 installed. During use, two of the four variable universal wheels 2 can be converted into fixed wheels as needed, providing exceptional flexibility. The variable universal wheels 2 utilize first bearings 205 in place of conventional wheels, significantly reducing the resistance associated with transporting heavy molds and, consequently, operator fatigue.

[0038] In practice, using a mold-changing cart equipped with fixed fixed and universal wheels often results in significant inconvenience in transportation and position adjustment due to site limitations, leading to low production efficiency and excessive labor intensity. The present invention allows operators to adjust the variable universal wheels from universal wheels to fixed wheels, or vice versa, depending on the specific site conditions, greatly improving operational flexibility.

[0039] The top of the wheel mounting bracket 204 is movably connected to the fourth mounting seat 201 via a bearing, providing the structural foundation for the steering of the first bearing 205. The first bearing 205 is in perpendicular contact with the bottom surface, resulting in a higher radial load and lower axial load, making a deep groove ball bearing a more suitable and cost-effective option. The L-shaped cross-section of the stop block 203 allows for contact between the stop block 203 and the fourth mounting seat 201 on two sides, making it easier to position the stop block 203 during installation.

[0040] The operator uses the handle 101 provided at the rear end of the frame 1 to push the present invention to move, and the mold is placed on the rollers 102 on the left and right sides of the top of the frame 1 to reduce resistance and facilitate pushing by the operator.

[0041] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A mold changing vehicle with variable universal wheels, comprising a vehicle frame (1), characterized in that: The bottom of the frame (1) is provided with at least three variable universal wheels (2) and a connecting mechanism (3); a fixing mechanism (4) is provided on the opposite side of the connecting mechanism (3), and the fixing mechanism (4) is fixedly provided on the equipment where the mold needs to be replaced; rollers (102) are provided on the left and right sides of the top of the frame (1), and a handle (101) is provided on the rear side of the top; The fixing mechanism (4) comprises a first mounting seat (401), a limiting buckle (403) movably mounted on the front end of the first mounting seat (401), and an elastic element (402), wherein the limiting buckle (403) is symmetrically arranged and has an undercut structure on its inner side; the elastic element (402) is arranged between the outer side of the limiting buckle (403) and the side of the first mounting seat (401), and the first mounting seat (401) is fixedly arranged on the equipment where the mold needs to be replaced; The connecting mechanism (3) comprises a second connecting rod (304), a support block (303) fixedly arranged at the front end of the second connecting rod (304), a second mounting seat (301), and a connecting block (302) fixedly arranged at the front side of the second mounting seat (301), wherein the second mounting seat (301) is fixedly connected to the front end of the bottom of the frame (1), the second connecting rod (304) is movably embedded in the second mounting seat (301), and the support block (303) is located at the front side of the second mounting seat (301); the connecting block (302) and the support block (303) are connected to each other. ) are arranged on the opposite side of the limiting buckle (403), the front end of the connecting block (302) is closer to the limiting buckle (403), the width of the connecting block (302) is smaller than the width of the supporting block (303), and the left and right sides of the front end of the connecting block (302) are provided with an undercut structure, which matches the limiting buckle (403); the connecting block (302) is embedded in the second mounting seat (301) and the supporting block (303), wherein the rear end of the connecting block (302) is fixedly connected to the second mounting seat (301), and the middle end can slide relative to the supporting block (303).

2. A mold changing vehicle with variable universal wheels according to claim 1: a support rod (305) is provided at the rear end of the support block (303), one end of the support rod (305) is embedded in the second mounting seat (301) and is fixedly connected to the support block (303), and the other end extends to the rear of the second mounting seat (301) and is provided with a spring seat (306); a return spring (307) is provided on the support rod (305), one end of the return spring (307) acts on the spring seat (306), and the other end acts on the second mounting seat (301).

3. A mold-changing vehicle with variable universal wheels according to claim 1: the other end of the second connecting rod (304) relative to the connecting block (302) is embedded in the third mounting seat (308), and the third mounting seat (308) is fixedly arranged at the bottom of the rear end of the frame (1); a first connecting rod (309) is arranged on the third mounting seat (308), the upper end of the first connecting rod (309) extends to the rear of the frame (1), the middle part is movably mounted on the third mounting seat (308), and the lower end extends to the rear of the second connecting rod (304). When the upper end of the first connecting rod (309) is pulled backward, its lower end acts on the second connecting rod (304) to push the second connecting rod (304) forward.

4. A mold changing vehicle with variable universal wheels according to claim 1: chamfers are provided on both sides of the front ends of the connecting block (302) and the supporting block (303), and a chamfer is provided on the inner side of the front end of the limiting buckle (403); the elastic element (402) is a coil spring.

5. A mold-changing vehicle with a variable universal wheel according to claim 1: the variable universal wheel (2) comprises a fourth mounting seat (201), a steering shaft (202), and a wheel mounting frame (204) arranged from top to bottom, wherein the fourth mounting seat (201) is fixedly connected to the vehicle frame (1); the upper end of the steering shaft (202) is fixedly mounted on the fourth mounting seat (201), and the lower end is movably connected to the top of the wheel mounting frame (204); a first bearing (205) is movably provided at the bottom of the wheel mounting frame (204), and the first bearing (205) is in vertical contact with the ground; a limit block (203) is provided on the side of the wheel mounting frame (204) to limit its rotation, and the limit block (203) is fixedly connected to the fourth mounting seat (201).

6. A mold changing vehicle with variable universal wheels according to claim 5: the steering shaft (202) is embedded in the top of the wheel mounting frame (204) and is movably connected via a bearing; the first bearing (205) is a deep groove ball bearing.

7. A mold changing vehicle with variable universal wheels according to claim 6: the cross section of the limiting block (203) is L-shaped.

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