A shoe last clamp

Abstract

The utility model relates to a kind of shoe tree clamps, including base, the base one side jaw assembly, the base one side is equipped with driving element, driving element is equipped with telescopic rod in rack, driving element can drive telescopic rod reciprocating telescopic motion, telescopic rod end is equipped with swing arm, swing arm one end is connected with telescopic rod other end and jaw assembly connection, telescopic rod drives swing arm swing, to make jaw assembly move towards or relative motion, driving telescopic rod drives swing arm swing by driving element, realize the efficient synchronous movement towards or relative motion of jaw assembly, swing arm replaces multiple hinged connecting rod, eliminates gap cumulative error, ensure that two jaws are stressed evenly, motion synchronization.

Description

Technical Field

[0001] This utility model relates to the field of equipment clamps, specifically to a shoe last clamp. Background Technology

[0002] Shoe lasts, a traditional Chinese shoemaking tool, are also known as shoe toes. Modern shoe lasts are basically made of metal and are processed in CNC machine tools, processing equipment, shoe mold engraving machines, etc. The equipment is usually equipped with clamps that fit the shoe lasts.

[0003] Publication number CN211459053U discloses a chip-mounted shoe last and its clamp, comprising a shoe last body and a clamp for clamping the shoe last body. The shoe last body has an annular groove and a gripping groove on its upper side. The clamp includes a fixed base, a left clamping block, and a right clamping block. The fixed base has a positioning pin at its upper end that mates with a positioning hole in the shoe last body. The fixed base has near-circular grooves on both sides. The left and right clamping blocks each have rotating protrusions that match the near-circular grooves. The left and right clamping blocks swing back and forth around the rotating protrusions. The upper ends of both the left and right clamping blocks are provided with… The hook is used to insert into the annular groove of the shoe last body. A chip is set at the bottom of the shoe last to store the information of the shoe last, which can be read during the shoe making process. The processing equipment can perform corresponding processing according to the read shoe last information, making the processing process more intelligent. This technology uses a connecting rod as the transmission of the gripper. The connecting rod transmits power through multiple hinge points. Under long-term use, gaps or wear at the hinge points will cause the movement trajectory to deviate, affecting the synchronization of the two grippers, resulting in uneven clamping force or shoe last skew. At the same time, the connecting rod may undergo elastic deformation when subjected to large forces. Therefore, this technology still has some room for improvement. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a shoe last clamp in view of the shortcomings of the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a shoe last clamp, including a base and a gripper assembly on one side of the base, characterized in that: a driving member is provided on one side of the base, the driving member is mounted on a frame with a telescopic rod, the driving member can drive the telescopic rod to reciprocate and extend, a swing arm is provided at the end of the telescopic rod, one end of the swing arm is connected to the telescopic rod and the other end is connected to the gripper assembly, the telescopic rod drives the swing arm to swing, causing the gripper assembly to move towards or relative to each other.

[0006] By adopting the above technical solution, the telescopic rod is driven by the driving component to drive the swing arm to swing, thereby realizing the efficient synchronous opposite or relative movement of the gripper assembly. The swing arm replaces the multi-hinged connecting rod, eliminating the cumulative error of the gap, ensuring that the two grippers are evenly stressed and move synchronously, avoiding gripping offset caused by wear or deformation. At the same time, the swing arm directly transmits the driving force, reducing the risk of elastic deformation.

[0007] The aforementioned shoe last clamp can be further configured as follows: the frame is provided with connecting flanges at both ends of the telescopic rod, the connecting flanges are provided with abutment grooves for the swing arm to abut, the telescopic rod is provided with a connecting member through the connecting flange at one end facing the gripper assembly, the connecting member is provided with a first insertion groove at both ends for the swing arm to insert, and the gripper assembly is provided with a second insertion groove for the other end of the swing arm to insert.

[0008] Using the above technical solution, the frame is equipped with connecting flanges at both ends of the telescopic rod, and abutment grooves are opened on the connecting flanges. When the telescopic rod drives the swing arm to swing, the swing arm abuts against the abutment groove, which can withstand the force generated by the swing arm movement. The connecting flange is inserted through the end of the telescopic rod facing the gripper assembly and a connector is provided. The first insertion groove at both ends of the connector is for the swing arm to be inserted. The gripper assembly is provided with a second insertion groove to be inserted into the other end of the swing arm. This can accurately convert the linear motion of the telescopic rod into the swing of the swing arm, so that the gripper assembly can achieve stable opposite or relative movement.

[0009] The aforementioned shoe last clamp can be further configured such that: the connecting flange is provided with a guide plate on the side facing the clamping claw assembly, the guide plate is provided with a guide groove in the axial direction, the clamping claw assembly includes a guide block slidably connected to the guide groove, and a clamping claw is fixedly provided on one side of the guide block.

[0010] Using the above technical solution, a guide plate is provided on the side of the connecting flange facing the gripper assembly, and a guide groove is provided on the guide plate in the axial direction. The guide block of the gripper assembly is slidably connected to the guide groove, so that when the grippers move towards or relative to each other, they can only move along the direction of the guide groove, which effectively avoids lateral displacement of the grippers during the movement.

[0011] The aforementioned shoe last clamp can be further configured such that: the guide plate has an installation cavity for mounting the swing arm, both the swing arm and the installation cavity have hinge holes, and the swing arm is hinged in the installation cavity.

[0012] The above technical solution includes a mounting cavity for the swing arm, which is housed within the guide plate. Both the swing arm and the guide plate have hinge holes within the mounting cavity. The swing arm is hinged within the mounting cavity through these hinge holes, providing a stable support point for its movement. This makes the swing arm more stable during its swing. The hinged connection accurately converts the linear motion of the telescopic rod into the swing of the swing arm, thereby driving the gripper assembly to move in opposite or relative directions, ensuring the accuracy and stability of the gripper assembly's movement.

[0013] The aforementioned shoe last clamp can be further configured such that: the clamping claw has a limiting groove on the side facing the guide block; the guide block has a limiting block that engages with the limiting groove; both the limiting block and the clamping claw have mounting holes; the limiting block has an abutting block on the side of the clamping claw that abuts against the clamping claw; and the clamping claw has a clamping groove on the side away from the abutting block.

[0014] Using the above technical solution, the limiting groove opened on the side of the gripper facing the guide block is engaged with the limiting block on the guide block. The mounting holes opened on both the limiting block and the gripper can be further fixed by bolts or other connecting parts, ensuring that there will be no loosening or displacement between the gripper and the guide block when the gripper moves towards or relative to each other, thus ensuring the stability of the gripper movement. The abutment block set on the side of the limiting block can abut tightly with the gripper. When the gripper applies clamping force to the shoe last, the abutment block can share part of the pressure.

[0015] The aforementioned shoe last clamp can be further configured such that: the guide block has sliding grooves at both ends, and the guide groove is provided with a sliding block within the sliding groove.

[0016] By adopting the above technical solution, the cooperation between the sliding block and the sliding groove reduces the friction between the guide block and the guide groove, making the entire movement process smoother. At the same time, the sliding of the sliding block in the sliding groove provides more stable support and guidance for the movement of the guide block.

[0017] The aforementioned shoe last clamp can be further configured such that the driving component is a hydraulic cylinder.

[0018] By adopting the above technical solution, the hydraulic cylinder can generate a large thrust, which can provide strong power to the telescopic rod, thereby driving the swing arm and the gripper assembly. When clamping the shoe last, it can provide a sufficiently large clamping force to ensure that the shoe last is firmly fixed. At the same time, the hydraulic cylinder can precisely control the extension speed, stroke and position of the telescopic rod through the hydraulic system. The operator can flexibly adjust the working parameters of the hydraulic cylinder according to the specific clamping requirements of different shoe lasts, so that the gripper assembly can accurately complete the opposite or relative movement.

[0019] The beneficial effects of this utility model are as follows: the telescopic rod is driven by the driving component to drive the swing arm to swing, thereby realizing the efficient synchronous movement of the gripper assembly in opposite directions or relative to each other. The swing arm replaces the multi-hinged connecting rod, eliminating the cumulative error of the gap and ensuring that the two grippers are subjected to uniform force and move synchronously. Attached Figure Description

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

[0021] Figure 2 This is an exploded view of the structure of this utility model.

[0022] Figure 3 This is a structural diagram of the guide plate of this utility model.

[0023] Figure 4 This is a structural diagram of the guide block of this utility model.

[0024] Label annotations: 1-Base, 2-Drive component, 3-Telescopic rod, 4-Swing arm, 5-Connecting flange, 6-Abutment groove, 7-Connector, 8-First insertion groove, 9-Second insertion groove, 10-Guide plate, 11-Guide groove, 12-Guide block, 13-Gripper, 14-Mounting cavity, 15-Hinge hole, 16-Limiting groove, 17-Limiting block, 18-Mounting hole, 19-Abutment block, 20-Clamping groove, 21-Sliding groove, 22-Sliding block. Detailed Implementation

[0025] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0026] like Figure 1-4A shoe last clamp is disclosed, comprising a base 1, a rotating shaft 2 on the base 1, and a shoe last fixing mechanism on the rotating shaft 2. The shoe last fixing mechanism includes a rotating seat 3 that can rotate with the rotating shaft. The rotating seat 3 includes a clamping part 15, and clamping blocks are provided on both sides of the clamping part. The two clamping blocks are connected by a connecting assembly to clamp or release the shoe last. The characteristic feature is that a height adjustment assembly is provided between the rotating seat 3 and the clamping part 15, which is linked to the rotating seat 3. One end of the height adjustment assembly is connected to the rotating seat 3, and the other end is connected to the clamping part 15, so that a height difference is formed between the rotating seat 3 and the clamping part 15. In the above technical solution, the clamping part 15 is installed on the rotating base 3 via a height adjustment device, creating a height difference between the rotating shaft 2 and the clamping part 15. When the equipment needs to process the shoe toe, the clamp drives the height adjustment component via the rotating base 3, making the clamping part 14 lower than the rotating shaft 2, thus ensuring that the height of the shoe toe remains coaxial with the rotating shaft. When processing the shoe heel, since the sleeve to the shoe heel is basically coaxial, the clamp drives the height adjustment component via the rotating base 3, making the clamping part 15 higher than the rotating shaft 2. The shoe last will only be slightly higher than the clamp, eliminating the need to increase the height of the processing table, greatly reducing the manufacturing cost of the equipment. The height adjustment device includes one end that is connected to the rotating base 3. A connecting member 4 is rotatably connected to form a first connecting part. The other end of the connecting member 4 away from the rotating seat 3 is fixedly connected to the clamping part 15 to form a second connecting part. The first connecting part and the second connecting part form a height difference. When the first connecting part is higher than the second connecting part, the shoe last with the toe facing upward is fixed to the clamping part 15, ensuring that the height of the shoe last will not be much higher than the clamp. The processing table does not need to be raised to process the shoe toe, reducing the manufacturing cost of the processing equipment. The first connecting part includes a first through hole 5 provided at one end of the connecting member 4 for the rotating shaft 2 to be sleeved and connected. The through hole 5 is surrounded by multiple connecting holes 6 that are fixedly connected to the rotating seat. The connector 4 is sleeved on the rotating shaft 2 through the first through hole 5 and fixedly connected to the rotating seat 3 through the multiple connecting holes 6. The rotating shaft 2 drives the rotating seat 3 and the connector 4 to rotate, so that the shoe last can be processed at multiple angles. The second connecting part includes a clamping base 7 provided at the end of the clamping part 15 facing the connector 4. The end of the connector 4 away from the rotating seat 3 and the clamping base 7 are both provided with mounting holes 8 for fixing. The second connecting part, including the clamping base 7 and the connector 4, is fixedly connected to the connector 4 through multiple mounting holes 8, so that the connection of the clamping part 15 is more stable.

[0027] like Figure 1-4The shoe last clamp shown can be further configured as follows: the connecting member 4 has a second through hole 9 at the end away from the rotating seat 3 for the positioning block 10 to be fitted; the clamping part base 7 has a positioning groove 11 for the positioning block 10 to abut against; the positioning block 10 between the connecting member 4 and the clamping part base 7 can quickly and accurately position the installation position of the clamping part 15, facilitate the installation of the clamping part 15, and further limit the clamping part 15, making the installation of the clamping part 15 more stable; the positioning block 10 has an annular protrusion 12; the second through hole 9 has an annular groove 13 for the annular protrusion 12 to abut against; the positioning block 10 also has a plurality of positioning holes 14 to facilitate fixed connection with the connecting member 4; the positioning block uses the annular protrusion 12 to abut against the annular groove 13 of the second through hole 9; the positioning block has a plurality of positioning holes 14 to strengthen the connection between the positioning block 14 and the connecting member 4, so that it will not loosen or shift during use, making the equipment structure more stable and increasing the stability of the equipment.

[0028] The beneficial effects of this utility model are as follows: The clamping part 15 is installed on the rotating seat 3 through the height adjustment device, so that the clamping part 15 and the rotating shaft 2 form a certain height difference. However, when it is necessary to process the shoe toe, the clamping part 15 is lower than the rotating shaft 2, and the shoe last will not be much higher than the clamp. There is no need to increase the height of the processing equipment, which greatly reduces the production cost.

Claims

1. A shoe last clamp comprising a base, a side jaw assembly on one side of the base, characterized by: A drive unit is provided on one side of the base. The drive unit passes through a telescopic rod on the frame. The drive unit can drive the telescopic rod to reciprocate. A swing arm is provided at the end of the telescopic rod. One end of the swing arm is connected to the telescopic rod and the other end is connected to the gripper assembly. The telescopic rod drives the swing arm to swing, causing the gripper assembly to move towards or relative to each other.

2. A last clamp according to claim 1, characterized in that: The frame is provided with connecting flanges at both ends of the telescopic rod. The connecting flanges have abutment grooves for the swing arm to abut. The telescopic rod passes through the connecting flange at one end facing the gripper assembly and is provided with a connector. The connector has a first insertion groove at both ends for the swing arm to insert into. The gripper assembly has a second insertion groove for the other end of the swing arm to insert into.

3. A last clamp according to claim 2, wherein: The connecting flange is provided with a guide plate on the side facing the gripper assembly. The guide plate has a guide groove axially opened. The gripper assembly includes a guide block that is slidably connected to the guide groove. A gripper is fixedly provided on one side of the guide block.

4. A last clamp according to claim 3, wherein: The guide plate has a mounting cavity for mounting the swing arm. Both the swing arm and the mounting cavity have hinge holes, and the swing arm is hinged in the mounting cavity.

5. A last clamp according to any one of claims 1-4, characterized in that: The gripper has a limiting groove on the side facing the guide block. The guide block has a limiting block that engages with the limiting groove. Both the limiting block and the gripper have mounting holes. The limiting block is located on the side of the gripper and has an abutment block that abuts against the gripper. The gripper has a clamping groove on the side away from the abutment block.

6. A last clamp according to claim 5, wherein: The guide block has sliding grooves at both ends, and a sliding block is provided inside the guide groove.

7. A last clamp according to claim 1, wherein: The driving component is a hydraulic cylinder.

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