Threaded last positioning jig

Abstract

The utility model discloses a thread formula last positioning clamp, including clamp base plate, the upper surface one side of clamp base plate is equipped with driving wheel through bearing, the upper surface other side of clamp base plate is equipped with driven wheel through bearing, and the transmission connection through synchronous belt between driving wheel and driven wheel, the upper surface center position fixed mounting of driven wheel has big pull rod, and the inside of the top end of big pull rod is inserted with small pull rod, and the screw connection between big pull rod and small pull rod, the top end of small pull rod is provided with expansion head, and expansion head adopts conical structure design, and the outside of the top end of small pull rod and located expansion head is equipped with expansion sleeve, the utility model discloses a thread transmission mode can drive small pull rod and carry out telescopic processing, and the expansion of expansion sleeve can be driven through the telescopic of small pull rod, and the expansion of expansion sleeve is completed, has good practical use effect, can be tensioned positioning processing to the central hole of last, and the positioning stability is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of last positioning equipment, specifically a threaded last positioning fixture. Background Technology

[0002] A shoe last, also known as a shoe toe, is a wooden, plastic, or metal mold designed according to the shape of the foot. It is used in footwear production to fix the upper and shape the shoe.

[0003] The shoe last is the foundation of a shoe; it's the mold that shapes the shoe. The shoe last not only determines the shoe's shape and style but also its fit and its ability to protect the foot. Therefore, shoe last design must be based on foot shape, but it cannot be identical to the foot shape. This is because the shape, size, and stress of the foot change in static and dynamic states. Furthermore, the type, style, manufacturing process, properties of raw materials, and wearing environment and conditions all vary, making it impossible for the shoe last's shape and dimensions to perfectly match the foot shape.

[0004] Existing shoe lasts require alignment and positioning during production. However, most traditional last positioning clamps can only perform positioning and clamping work on both sides of the last, and cannot limit the middle of the last. In actual production, this can easily lead to unstable clamping of the shoe last and vertical movement. Therefore, this utility model proposes a threaded last positioning clamp. Utility Model Content

[0005] The purpose of this utility model is to provide a threaded last positioning fixture to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a threaded last positioning fixture, comprising a fixture base plate, a drive wheel mounted on one side of the upper surface of the fixture base plate via a bearing, and a driven wheel mounted on the other side of the upper surface of the fixture base plate via a bearing. The drive wheel and the driven wheel are connected by a synchronous belt drive. A large pull rod is fixedly mounted at the center of the upper surface of the driven wheel. A small pull rod is inserted into the top of the large pull rod. The large pull rod and the small pull rod are threaded together. A tightening head is provided at the top of the small pull rod. The tightening head adopts a conical structure design. An expansion sleeve is fitted around the top of the small pull rod and outside the tightening head.

[0007] Preferably, the upper surface of the fixture base plate is fixedly mounted with a fixture upper plate via a column.

[0008] Preferably, an upper bracket is fixedly installed on the upper surface of the clamp plate and on one side of the small pull rod.

[0009] Preferably, the upper support adopts a U-shaped structure design, and the upper surface of the upper support is fixedly connected to the lower surface of the expansion sleeve.

[0010] Preferably, a left clamping plate is provided on one side of the upper bracket, and a right clamping plate is provided on the other side of the upper bracket.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] When the small pull rod retracts downward under the action of the screw rotation, it can abut against the expansion sleeve to open. In this way, the opening expansion sleeve can tighten and fix the last head, which has a good tightening and limiting fixation effect, prevents the last head from moving up and down, and improves the overall stability of the positioning fixture. The specific state is shown in the attached figure of the instruction manual.

[0013] After the expansion sleeve tightens and fixes the shoe last, the cylinders on both sides can drive their output rods to extend, so that the left and right clamping plates can move closer to each other. Thus, the two clamping plates that are close to each other can perform lateral clamping on the outer walls of both sides of the last. By using the expansion and tightening structure, the positioning clamp of this utility model can complete the expansion and tightening fixation of the last and the left and right clamping fixation. It has a practical effect of dual positioning and clamping, which can effectively prevent the last from moving up and down and left and right, improve the stability of clamping, and has a better positioning and clamping effect, making it more practical.

[0014] This utility model uses a threaded transmission to drive a small pull rod to extend and retract, thereby causing the expansion sleeve to open and tighten. It has good practical effect and can tighten and position the center hole of the last, improving positioning stability. At the same time, the positioning and tightening structure is simpler and more practical, with low manufacturing difficulty, making it suitable for implementation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the positioning clamp and the last clamping state in an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the positioning clamp assembly structure according to an embodiment of the present utility model;

[0017] Figure 3 This is a schematic diagram of the upper support structure according to an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of the tie rod connection structure according to an embodiment of the present utility model.

[0019] In the diagram: 1. Fixture base plate; 2. Drive wheel; 3. Driven wheel; 4. Synchronous belt; 5. Large tie rod; 6. Small tie rod; 7. Expansion sleeve; 8. Fixture upper plate; 9. Upper bracket; 10. Left clamping plate; 11. Right clamping plate. 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] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] Please see Figure 1-4 An embodiment of this utility model is provided: a threaded last positioning fixture, including a fixture base plate 1, a drive wheel 2 is mounted on one side of the upper surface of the fixture base plate 1 via a bearing, and a driven wheel 3 is mounted on the other side of the upper surface of the fixture base plate 1 via a bearing. The drive wheel 2 and the driven wheel 3 are connected by a synchronous belt 4.

[0024] In practical use, the bottom of the drive wheel 2 can be connected to a motor for driving rotation. The output shaft of the motor can drive the drive wheel 2 to rotate. When the drive wheel 2 is rotating, it can be driven to rotate synchronously by the drive wheel 3 through the synchronous belt 4.

[0025] A large pull rod 5 is fixedly installed at the center of the upper surface of the driven wheel 3. A small pull rod 6 is inserted inside the top of the large pull rod 5. The large pull rod 5 and the small pull rod 6 are threaded together. With this structural design, when the driven wheel 3 rotates, it synchronously drives the large pull rod 5 to rotate. Since the large pull rod 5 and the small pull rod 6 are threaded together, when the large pull rod 5 rotates clockwise or counterclockwise, the small pull rod 6 connected inside can be extended or retracted within the large pull rod 5.

[0026] In order to tighten and limit the last, the top of the small pull rod 6 is provided with a tightening head. The tightening head adopts a conical structure design, and the top of the small pull rod 6 and the outside of the tightening head are fitted with an expansion sleeve 7.

[0027] With this structural design, when the small pull rod 6 retracts downward under the action of the screw rotation, it can push the expansion sleeve 7 open through the expansion head at the top. In this way, the last can be tightened and fixed by the opened expansion sleeve 7, which has a good tightening and limiting fixing effect, prevents the last from moving up and down, and improves the overall stability of the positioning fixture.

[0028] In this embodiment, in order to improve the integrity of the positioning fixture, the upper surface of the fixture base plate 1 is fixedly installed with the fixture upper plate 8 by the column, and the upper surface of the fixture upper plate 8 and the side of the small tie rod 6 are fixedly installed with the upper bracket 9.

[0029] The upper bracket 9 adopts a U-shaped structure design, and the upper surface of the upper bracket 9 is fixedly connected to the lower surface of the expansion sleeve 7, that is, the expansion sleeve 7 is fixedly installed on the upper surface of the upper bracket 9.

[0030] In this embodiment, in order to perform lateral clamping of the last, a left clamping plate 10 is provided on one side of the upper bracket 9, and a right clamping plate 11 is provided on the other side of the upper bracket 9.

[0031] In practical use, the left clamping plate 10 and the right clamping plate 11 can be connected to the output rod of the cylinder, thereby driving the two clamping plates to move relative to each other through the output rod of the cylinder, thus completing the left and right clamping and positioning of the last and improving stability.

[0032] Working principle: In actual use, the positioning clamp of this utility model can connect the drive wheel 2 to the output shaft of the motor, while the left clamping plate 10 and the right clamping plate 11 can be connected to the output rod of the cylinder respectively.

[0033] When it is necessary to position and clamp the shoe last, the shoe last with a pre-drilled hole in the middle can be inserted into the expansion sleeve 7, that is, the expansion sleeve 7 is inserted into the pre-drilled expansion and positioning hole of the shoe last. Then, the output shaft of the motor can drive the drive wheel 2 to rotate. When the drive wheel 2 rotates, it can drive the driven wheel 3 to rotate synchronously through the synchronous belt 4. When the driven wheel 3 rotates, it synchronously drives the large pull rod 5 to rotate. Since the large pull rod 5 and the small pull rod 6 are threadedly connected, when the large pull rod 5 rotates clockwise or counterclockwise, the small pull rod 6 with its internal thread can be extended or retracted within the large pull rod 5.

[0034] When the small pull rod 6 retracts downwards due to the rotation of the thread, its top tightening head abuts against the expansion sleeve 7, causing it to open. This open expansion sleeve 7 tightens and secures the last, providing a good tightening and limiting effect, preventing the last from moving up and down, and improving the overall stability of the positioning fixture. For specific details, please refer to the appendix of the instruction manual. Figure 1 As shown;

[0035] After the expansion sleeve 7 tightens and fixes the shoe last, the cylinders on both sides can drive their output rods to extend, so that the left clamping plate 10 and the right clamping plate 11 can move closer to each other. Thus, the two clamping plates that are close to each other can perform lateral clamping on the outer walls of both sides of the last. By using the expansion and tightening structure, the positioning clamp of this utility model can complete the expansion and tightening and left and right clamping of the last. It has a dual positioning and clamping effect, which can effectively prevent the last from moving up and down and left and right, improve the stability of clamping, and has a better positioning and clamping effect, making it more practical.

[0036] This utility model uses a threaded transmission to drive the small pull rod 6 to extend and retract, thereby causing the expansion sleeve 7 to open and tighten. This has a good practical effect, and can tighten and position the center hole of the last, improving positioning stability. At the same time, the positioning and tightening structure is simpler and more practical, with low manufacturing difficulty, making it suitable for implementation.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A threaded last positioning fixture, comprising a fixture base plate (1), characterized in that, A drive wheel (2) is mounted on one side of the upper surface of the fixture base plate (1) via a bearing, and a driven wheel (3) is mounted on the other side of the upper surface of the fixture base plate (1) via a bearing. The drive wheel (2) and the driven wheel (3) are connected by a synchronous belt (4). A large pull rod (5) is fixedly mounted at the center of the upper surface of the driven wheel (3). A small pull rod (6) is inserted inside the top of the large pull rod (5). The large pull rod (5) and the small pull rod (6) are threaded together. A tensioning head is provided at the top of the small pull rod (6). The tensioning head adopts a conical structure design. An expansion sleeve (7) is sleeved on the top of the small pull rod (6) and outside the tensioning head.

2. The threaded last positioning fixture according to claim 1, characterized in that: The upper surface of the clamp base plate (1) is fixedly mounted with the clamp upper plate (8) by a column.

3. A threaded last positioning fixture according to claim 2, characterized in that: An upper bracket (9) is fixedly installed on the upper surface of the clamp plate (8) and on one side of the small pull rod (6).

4. A threaded last positioning fixture according to claim 3, characterized in that: The upper bracket (9) adopts a U-shaped structure design, and the upper surface of the upper bracket (9) is fixedly connected to the lower surface of the expansion sleeve (7).

5. A threaded last positioning fixture according to claim 3, characterized in that: A left clamping plate (10) is provided on one side of the upper bracket (9), and a right clamping plate (11) is provided on the other side of the upper bracket (9).

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