Leather stretching device

Abstract

A leather stretching device comprises a main frame, a thrust device and a plurality of claw units. The main frame is in a G-shaped structure as a whole, and the lower end of the main frame is provided with an operation platform, and the operation platform is provided with a plurality of circumferentially distributed sliding grooves, and the sliding grooves are symmetrical in pairs, and the sliding grooves are radially outwardly extended with a virtual circle as the center. The thrust device is arranged above the operation platform, and the thrust device comprises a thrust cylinder and a thrust rod connected with the thrust cylinder, and the end of the thrust rod is provided with a hinged end. The claw unit comprises an elastic telescopic rod and a clamping block assembly, a plurality of the elastic telescopic rods are circumferentially hingedly connected to the periphery of the hinged end, the clamping block assembly comprises an upper clamping block and a lower clamping block which are matched with each other, the lower clamping block is slidably matched with the sliding groove, and the upper clamping block and the lower clamping block are provided with a clamping gap for clamping and fixing the leather.

Description

Technical Field

[0001] This invention relates to the field of leather processing, and more specifically to a leather stretching device. Background Technology

[0002] Before the production of leather products, the leather to be processed needs to be flattened to ensure a smooth surface without wrinkles and to ensure the high quality of the produced leather. However, the current leather flattening devices are not ideal in terms of flattening effect and cannot meet the actual production and processing needs. Therefore, a leather stretching and flattening device for leather product production is provided to solve the above-mentioned technical problems.

[0003] Existing technology, application number 2022203695483, discloses a leather stretching and flattening device for leather product manufacturing. Specifically, it includes a worktable, a stretching component, a moving component, and a flattening component. The flattening component includes a second motor housing, a positioning plate, a second drive motor, a rotating rod, an adjusting rod, a connecting block, and a pressure block. The positioning plate is fixedly connected to the moving component, and the second motor housing is fixedly connected to the positioning plate. The second drive motor is fixedly disposed within the second motor housing, and its output end rotatably passes through the second motor housing and is fixedly connected to the rotating rod. A through-hole corrugated groove is fixedly provided on the positioning plate. One end of the connecting block is hinged to the adjusting rod, and the other end of the connecting block slidably passes through the corrugated groove and is fixedly connected to the pressure block. Although the above technical solution can achieve the stretching and flattening function of leather products, it does not have the corresponding elastic function. In actual stretching processes, excessive rigid stretching force can easily lead to leather breakage and excessive deformation. Summary of the Invention

[0004] To address the above problems, the present invention provides a leather stretching device:

[0005] A leather stretching device, comprising

[0006] The main frame has a G-shaped structure. An operating platform is provided at the upper part of the lower part of the main frame. Multiple circumferentially distributed sliding grooves are provided on the operating platform. The multiple sliding grooves are symmetrical in pairs and extend outward along the radius length direction with a virtual circle as the center.

[0007] A thrust device is located directly above the operating platform. The thrust device includes a thrust cylinder and a thrust rod connected to the thrust cylinder. The end of the thrust rod is provided with a hinged end.

[0008] Multiple claw units, each claw unit including an elastic telescopic rod and a clamping pressure block assembly, wherein the multiple elastic telescopic rods are circumferentially hinged to the periphery of the hinge end, and the clamping pressure block assembly includes an upper pressure block and a lower pressure block that clamp and fit together. The lower end face of the upper pressure block is provided with an upper pressure surface, and the lower pressure block is slidably fitted with a sliding groove. The upper end of the lower pressure block is provided with a lower pressure surface, and a clamping gap for clamping and fixing leather is provided between the upper pressure surface and the lower pressure surface.

[0009] When the thrust cylinder drives the thrust rod to push outward, the claw unit clamps the leather through the upper and lower pressure blocks and slides outward along the groove, thereby performing corresponding elastic stretching work on the leather.

[0010] Preferably, the elastic telescopic rod includes an upper sleeve rod and a lower sleeve rod. The upper end of the upper sleeve rod is hinged, and the lower end of the upper sleeve rod has an outwardly protruding core rod. The core rod and the shaft hole at the upper end of the lower sleeve rod form a guide rail fit. A thrust spring is sleeved on the core rod. The upper and lower ends of the thrust spring abut against the lower end face of the upper sleeve rod and the upper end face of the lower sleeve rod, respectively. The lower end of the core rod has a square limiting slider, which forms a sliding limiting fit with a square cavity inside the lower sleeve rod. The thrust spring provided in this application can provide a corresponding elastic force for the elastic telescopic rod, and the core rod enables the elastic telescopic rod itself to have a corresponding telescopic function. The combination of the thrust spring and the core rod allows the elastic telescopic rod to have both elastic and telescopic functions simultaneously. The square limiting slider can be used to limit the relative displacement stroke of the upper sleeve rod and the lower sleeve rod, preventing the lower sleeve rod from separating from the upper sleeve rod.

[0011] Preferably, the upper pressing surface of the upper pressing block is provided with a magnetic surface layer, and the lower pressing block is made of ferrous metal material, and the magnetic surface layer and the lower pressing block form a magnetic attraction.

[0012] Preferably, the upper pressing surface is provided with an outwardly arrayed array of first serrated anti-slip patterns, and the lower pressing surface is provided with second serrated anti-slip patterns that mesh with the first serrated anti-slip patterns. The serrated anti-slip patterns can significantly improve the interlocking force between the upper and lower pressing blocks, preventing the leather fabric from detaching.

[0013] Preferably, the lower part of the hinge end is provided with multiple circumferentially distributed mounting grooves, each corresponding to a claw unit. An arc-shaped locking groove is provided inside the mounting groove, and a magnetic layer is provided on the surface of the arc-shaped locking groove. The upper end of the upper sleeve rod is provided with an arc-shaped locking end that forms a detachable movable limit with the arc-shaped locking groove, and the arc-shaped locking end and the magnetic layer form a magnetic attraction engagement. First, the arc-shaped locking end can rotate relative to the arc-shaped locking groove, thereby allowing the upper sleeve rod to flip relative to the hinge end. Second, the mounting grooves and arc-shaped locking grooves allow for very convenient detachment of the arc-shaped locking end, improving flexibility. Finally, the magnetic layer ensures that the arc-shaped locking end has a detachable function while preventing it from falling off.

[0014] Preferably, the outer side of the arc-shaped locking groove is provided with a relatively protruding limiting protrusion, the limiting protrusion corresponds to the groove opening of the mounting groove, and the limiting protrusion and the arc-shaped locking end form a limiting abutment cooperation.

[0015] Beneficial effects: The thrust cylinder drives the thrust rod to move down, the thrust rod drives the hinge end to move down, the hinge end causes the claw unit to spread out and move, and the distance between the two symmetrical clamping pressure block components is relatively extended, thereby generating a corresponding tensile force on the leather itself. The present application adopts an elastic telescopic rod structure, so it has a corresponding elastic force in stretching the leather itself, which can effectively avoid damage to the leather fabric due to rigid stretching. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment.

[0017] Figure 2 This is a front view schematic diagram of an embodiment.

[0018] Figure 3 This is a schematic diagram of the operating platform.

[0019] Figure 4 This is a cross-sectional schematic diagram of an elastic telescopic rod.

[0020] Figure 5 for Figure 4 Enlarged diagram of point A in the diagram.

[0021] Reference numerals in the attached drawings: 1. Main frame; 2. Operating platform; 3. Slide groove; 4. Thrust cylinder; 5. Thrust rod; 6. Hinge end; 7. Elastic telescopic rod; 71. Upper sleeve rod; 72. Lower sleeve rod; 73. Core rod; 74. Thrust spring; 75. Square limiting slider; 8. Upper pressure block; 9. Lower pressure block; 10. Mounting groove; 11. Arc-shaped locking groove; 12. Arc-shaped locking end; 13. Magnetic layer; 14. Limiting protrusion. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-5 The present invention will be further illustrated by the embodiments.

[0023] Example: Figure 1-2 As shown, a leather stretching device includes a main frame 1, a thrust device, and multiple claw units. The main frame 1 has an overall G-shaped structure. An operating platform 2 is provided at the upper lower part of the main frame 1. The operating platform 2 is provided with multiple circumferentially distributed sliding grooves 3, which are symmetrical in pairs and extend outwards radially from a virtual circle as the center. The thrust device is located directly above the operating platform 2. The thrust device includes a thrust cylinder 4 and a thrust rod 5 connected to the thrust cylinder 4. The end of the thrust rod 5 is provided with a hinged end 6.

[0024] like Figure 1 As shown, the claw unit includes elastic telescopic rods 7 and clamping block assemblies. Multiple elastic telescopic rods 7 are circumferentially hinged to the periphery of the hinge end 6. The clamping block assembly includes an upper clamping block 8 and a lower clamping block 9 that clamp and fit together. The lower end face of the upper clamping block 8 has an upper pressing surface. The lower clamping block 9 has a sliding fit with the sliding groove 3. The upper end of the lower clamping block 9 has a lower pressing surface. A clamping gap for clamping and fixing the leather is provided between the upper and lower pressing surfaces. The upper pressing surface of the upper clamping block 8 has a magnetic surface layer. The lower clamping block 9 is made of ferrous metal, and the magnetic surface layer and the lower clamping block 9 form a magnetic attraction fit. The upper pressing surface has an outwardly arrayed array of first serrated anti-slip patterns, and the lower pressing surface has second serrated anti-slip patterns that mesh with the first serrated anti-slip patterns. The serrated anti-slip patterns significantly improve the clamping force between the upper clamping block 8 and the lower clamping block 9, preventing the leather from detaching.

[0025] like Figure 4 As shown, the elastic telescopic rod 7 includes an upper sleeve rod 71 and a lower sleeve rod 72. The upper end of the upper sleeve rod 71 is hinged to a hinge end 6, and the lower end of the upper sleeve rod 71 is provided with an outwardly protruding core rod 73. The core rod 73 and the shaft hole provided at the upper end of the lower sleeve rod 72 form a guide rail cooperation. A thrust spring 74 is sleeved on the core rod 73. The upper and lower ends of the thrust spring 74 abut against the lower end face of the upper sleeve rod 71 and the upper end face of the lower sleeve rod 72, respectively. The lower end of the core rod 73 is provided with a square limiting slider 75. The square limiting slider 75 and the square cavity provided in the lower sleeve rod 72 form a sliding limiting cooperation. The thrust spring 74 provided in this application can provide a corresponding elastic force for the elastic telescopic rod 7, and the setting of the core rod 73 enables the elastic telescopic rod 7 to have a corresponding telescopic function. The setting of the thrust spring 74 and the core rod 73 enables the elastic telescopic rod 7 to have both elastic and telescopic functions at the same time. The square limiting slider 75 can be used to limit the relative displacement stroke of the upper sleeve rod 71 and the lower sleeve rod 72, so as to prevent the lower sleeve rod 72 from separating from the upper sleeve rod 71.

[0026] like Figure 5 As shown, the lower part of the hinge end 6 is provided with multiple circumferentially distributed mounting grooves 10, each mounting groove 10 corresponding to a claw unit. An arc-shaped locking groove 11 is provided inside the mounting groove 10, and a magnetic layer 13 is provided on the surface of the arc-shaped locking groove 11. The upper end of the upper sleeve rod 71 is provided with an arc-shaped locking end 12 that forms a detachable movable limit with the arc-shaped locking groove 11. The arc-shaped locking end 12 and the magnetic layer 13 form a magnetic attraction engagement. First, the arc-shaped locking end 12 can rotate relative to the arc-shaped locking groove 11, thereby allowing the upper sleeve rod 71 to flip relative to the hinge end 6. Second, the mounting grooves 10 and the arc-shaped locking grooves 11 allow for very convenient detachment of the arc-shaped locking end 12, improving flexibility. Finally, the magnetic layer 13 allows the arc-shaped locking end 12 to have a detachable function while preventing it from falling off. The outer side of the arc-shaped locking groove 11 is provided with a relatively protruding limiting protrusion 14, which corresponds to the opening of the mounting groove 10. The limiting protrusion 14 and the arc-shaped locking end 12 form a limiting abutment fit. In actual use, the user can adopt the following... Figure 1 The diagram shows the simultaneous operation of all four jaw units. When only unidirectional stretching of the leather fabric is required, two jaw units can be removed, allowing stretching of the leather fabric to be achieved solely through the remaining two jaw units.

[0027] Operating principle: The thrust cylinder 4 drives the thrust rod 5 to push outward, and the thrust rod 5 drives the hinge end 6 to move downward. The hinge end 6 causes each claw unit to spread out and move, and the distance between the two symmetrical clamping pressure block assemblies is relatively extended. The claw unit clamps the leather through the upper pressure block 8 and the lower pressure block 9 and slides outward along the slide groove 3 to perform corresponding elastic stretching work on the leather.

[0028] Obviously, the above embodiments of the present invention are merely illustrative examples and not intended to limit the implementation of the invention. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. However, these obvious variations or modifications derived from the essential spirit of the present invention still fall within the scope of protection of the present invention.

Claims

1. A leather stretching device, characterized in that, include The main frame (1) has a G-shaped structure. An operating platform (2) is provided at the upper part of the lower part of the main frame (1). Multiple circumferentially distributed sliding grooves (3) are provided on the operating platform (2). The multiple sliding grooves (3) are symmetrical in pairs and extend outward along the radius length direction with the virtual circle as the center. The thrust device is located directly above the operating platform (2). The thrust device includes a thrust cylinder (4) and a thrust rod (5) connected to the thrust cylinder (4). The end of the thrust rod (5) is provided with a hinge end (6). Multiple claw units, each claw unit includes an elastic telescopic rod (7) and a clamping block assembly. The multiple elastic telescopic rods (7) are circumferentially hinged to the periphery of the hinge end (6). The clamping block assembly includes an upper pressing block (8) and a lower pressing block (9) that clamp and fit together. The lower end face of the upper pressing block (8) is provided with an upper pressing surface. The lower pressing block (9) forms a sliding fit with the slide groove (3). The upper end of the lower pressing block (9) is provided with a lower pressing surface. A clamping gap for clamping and fixing leather is provided between the upper pressing surface and the lower pressing surface. The elastic telescopic rod (7) includes an upper sleeve rod (71) and a lower sleeve rod (72). The upper end of the upper sleeve rod (71) is hinged to a hinge end (6). The lower end of the upper sleeve rod (71) is provided with an outwardly protruding core rod (73). The core rod (73) and the shaft hole provided at the upper end of the lower sleeve rod (72) form a guide rail fit. The core rod (73) is sleeved with a thrust spring (74). The upper and lower ends of the thrust spring (74) respectively abut against and connect the lower end face of the upper sleeve rod (71) and the upper end face of the lower sleeve rod (72). The lower end of the core rod (73) is provided with a square limiting slider (75). The square limiting slider (75) and the square cavity provided in the lower sleeve rod (72) form a sliding limiting fit. The upper pressing surface is provided with a first serrated anti-slip pattern that protrudes outwardly, and the lower pressing surface is provided with a second serrated anti-slip pattern that meshes with the first serrated anti-slip pattern. When the thrust cylinder (4) drives the thrust rod (5) to push outward, the claw unit clamps the leather through the upper pressure block (8) and the lower pressure block (9) and slides outward along the slide groove (3) to perform corresponding elastic stretching work on the leather.

2. The leather stretching device according to claim 1, characterized in that: The upper pressing surface of the upper pressing block (8) is provided with a magnetic surface layer, and the lower pressing block (9) is made of ferrous metal. The magnetic surface layer and the lower pressing block (9) form a magnetic attraction.

3. The leather stretching device according to claim 1, characterized in that: The upper pressing surface is provided with an outwardly arrayed array of first sawtooth anti-slip patterns, and the lower pressing surface is provided with a second sawtooth anti-slip pattern that meshes with the first sawtooth anti-slip pattern.

4. The leather stretching device according to claim 1, characterized in that: The lower part of the hinge end (6) is provided with a plurality of circumferentially distributed mounting grooves (10), the mounting grooves (10) correspond to the claw unit, the inner side of the mounting groove (10) is provided with an arc-shaped locking groove (11), the surface of the arc-shaped locking groove (11) is provided with a magnetic layer (13), the upper end of the upper sleeve rod (71) is provided with an arc-shaped locking end (12) that forms a detachable movable limit with the arc-shaped locking groove (11), the arc-shaped locking end (12) and the magnetic layer (13) form a magnetic attraction fit.

5. A leather stretching device according to claim 4, characterized in that: The outer side of the arc-shaped locking groove (11) is provided with a relatively protruding limiting protrusion (14), the limiting protrusion (14) corresponds to the groove opening of the mounting groove (10), and the limiting protrusion (14) and the arc-shaped locking end (12) form a limiting abutment cooperation.

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