Pneumatic last positioning jig

Abstract

The utility model discloses a kind of pneumatic type last positioning clamps, including clamp base, the bottom end lower surface of clamp base is fixedly installed with driving cylinder, the output end of driving cylinder is provided with telescopic air pressure rod, the upper surface of clamp base is fixedly installed with upper support by bolt, the upper surface center position of upper support is fixedly installed with expansion sleeve, telescopic pull rod is inserted in the inside of expansion sleeve, telescopic pull rod and expansion sleeve are slidably connected, the top end of telescopic pull rod is fixedly installed with conical head, the bottom end of telescopic pull rod is fixedly connected with the air pressure rod of driving cylinder and passes through upper support, telescopic pull rod and conical head adopt integrally formed structure design, the utility model can effectively improve the positioning stability of shoe tree by expansion sleeve, avoid shoe tree to move up and down on expansion sleeve, so as to effectively avoid the sliding phenomenon of last when clamping, improve the overall stability of the utility model positioning clamp when clamping, improve use effect.

Description

Technical Field

[0001] This utility model relates to the field of last clamping technology, specifically a pneumatic last positioning clamp. 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 core mold in footwear production, and its three-dimensional shape directly determines the appearance, fit, and functionality of the shoe. As the "mother body" of the shoe, it needs to balance foot shape characteristics and process requirements in both static and dynamic states to ensure that the shoe is both beautiful and comfortable.

[0004] The shoe last not only determines the shape and style of the shoe, but also determines whether the shoe fits well and can protect the feet. When the shoe last is produced and used, positioning clamps are needed to position and fix the last to ensure the fixed production effect of the shoe.

[0005] However, most existing positioning clamps can only fix and hold the outer side of the shoe last. In actual use, due to the curved surface characteristics of the shoe last, the outer clamping plate is prone to sliding up and down when clamping, which affects the clamping stability and has certain shortcomings. Therefore, this utility model proposes a pneumatic last positioning clamp. Utility Model Content

[0006] The purpose of this utility model is to provide a pneumatic last positioning fixture to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a pneumatic last positioning fixture, comprising a fixture base, a drive cylinder fixedly mounted on the lower surface of the fixture base, a telescopic pneumatic rod provided at the output end of the drive cylinder, an upper bracket fixedly mounted on the upper surface of the fixture base by bolts, an expansion sleeve fixedly mounted at the center of the upper surface of the upper bracket, a telescopic pull rod inserted inside the expansion sleeve, the telescopic pull rod slidingly connected to the expansion sleeve, a conical head fixedly mounted at the top end of the telescopic pull rod, and the bottom end of the telescopic pull rod passing through the upper bracket and fixedly connected to the pneumatic rod of the drive cylinder.

[0008] Preferably, the upper support adopts an inverted U-shaped structure design.

[0009] Preferably, the telescopic rod is slidably connected to the upper bracket.

[0010] Preferably, the telescopic rod and the conical head adopt an integrated molding structure design.

[0011] 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.

[0012] Preferably, the outer walls of both the left and right clamping plates are fixedly connected to the output rod of the cylinder.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention effectively improves the positioning stability of the shoe last by using an expanding sleeve, preventing the shoe last from moving up and down on the sleeve. This effectively prevents the shoe last from sliding up and down during clamping, improving the overall stability of the positioning clamp and enhancing the performance. Furthermore, this invention uses a pneumatic cylinder to extend and retract the sleeve via a telescopic rod, making its working principle simpler and its structure more concise. This effectively reduces the complexity of the mechanism, improves the performance, and reduces manufacturing difficulty, resulting in a simple and practical design that significantly improves usability.

[0015] After the expansion sleeve expands and limits the center hole of the shoe last, the cylinders of the left and right clamps can be activated. When the cylinders are working, they drive the left and right clamps to move closer together through the output rod. In this way, the two clamps that move closer together can position and clamp the outside of the shoe last from left to right, preventing the shoe last from rotating and improving clamping stability. By using the expansion structure in conjunction with this utility model, the positioning clamp can complete the expansion and fixation of the last and the clamping fixation from left to right. It has a dual positioning and clamping effect, which can effectively prevent the last from moving up and down or left and right. It has a better positioning and clamping effect and is more practical. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front planar structure of the positioning fixture according to an embodiment of the present utility model;

[0017] Figure 2 This is a side view of the internal cross-sectional structure of the positioning fixture according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the connection structure between the expansion sleeve and the telescopic rod in an embodiment of this utility model;

[0019] Figure 4 This is a schematic diagram of the telescopic rod in the extended state according to an embodiment of the present invention.

[0020] In the diagram: 1. Fixture base; 2. Drive cylinder; 3. Pneumatic rod; 4. Upper bracket; 5. Expansion sleeve; 6. Telescopic rod; 7. Conical head; 8. Left clamping plate; 9. Right clamping plate. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] Please see Figure 1-4 An embodiment of this utility model is provided: a pneumatic last positioning fixture, including a fixture base 1, a drive cylinder 2 is fixedly installed on the lower surface of the bottom end of the fixture base 1, and a telescopic air pressure rod 3 is provided at the output end of the drive cylinder 2.

[0025] An upper bracket 4 is fixedly installed on the upper surface of the clamp base 1 by bolts. An expansion sleeve 5 is fixedly installed at the center of the upper surface of the upper bracket 4. The upper bracket 4 can be used as a plug-in bracket structure for the last. A telescopic rod 6 is inserted inside the expansion sleeve 5. The telescopic rod 6 and the expansion sleeve 5 are slidably connected up and down. A conical head 7 is fixedly installed at the top of the telescopic rod 6. The telescopic rod 6 and the conical head 7 adopt an integrated molding structure design.

[0026] Furthermore, in order to drive the telescopic rod 6 to extend and retract vertically, the bottom end of the telescopic rod 6 passes through the upper bracket 4 and is fixedly connected to the pneumatic rod 3 of the drive cylinder 2, and the telescopic rod 6 and the upper bracket 4 are slidably connected vertically.

[0027] Based on the above structure, when the positioning clamp of this utility model is used, a central hole for insertion and positioning is opened at the center position of the last of this utility model. The shoe last can be inserted into the outside of the expansion sleeve 5 through the central hole to complete the initial shoe last positioning and insertion work.

[0028] The drive cylinder 2 of this utility model can drive the telescopic rod 6 to extend and retract through its pneumatic rod 3. Since the top of the telescopic rod 6 is integrally connected to a conical head 7, when the telescopic rod 6 retracts downward under the action of the pneumatic rod 3, it can simultaneously drive the conical head 7 at the top to descend. In this way, the descending conical head 7 can open the tension sleeve 5, so that the tension sleeve 5 is in an expanded and open state. In this way, the opened tension sleeve 5 can tighten and fix the center hole of the shoe last inserted outside it, thereby effectively preventing the shoe last from coming off the tension sleeve 5, which has a good shoe last limiting effect and prevents the shoe last from sliding up and down.

[0029] In this embodiment, in order to improve the structural performance, the upper support 4 adopts an inverted U-shaped structure design.

[0030] In this embodiment, in order to perform external lateral clamping work on the side of the shoe last, a left clamping plate 8 is provided on one side of the upper bracket 4, and a right clamping plate 9 is provided on the other side of the upper bracket 4. The outer walls of the left clamping plate 8 and the right clamping plate 9 are fixedly connected to the output rod of the cylinder.

[0031] The cylinders of the left clamping plate 8 and the right clamping plate 9 can drive the two clamping plates to move closer to each other. The left clamping plate 8 and the right clamping plate 9, which move closer to each other, can clamp and fix the two sides of the last head from the outside, preventing the last head from expanding and rotating, and have a certain positioning effect.

[0032] Working principle: When the positioning clamp of this utility model is used, a central hole for insertion and positioning is opened at the center position of the last of this utility model. The shoe last can be inserted into the outside of the expansion sleeve 5 through the central hole to complete the initial shoe last positioning and insertion work.

[0033] The drive cylinder 2 of this invention can drive the telescopic rod 6 to extend and retract via its pneumatic rod 3. Since the top of the telescopic rod 6 is integrally connected to a conical head 7, when the telescopic rod 6 retracts downward under the action of the pneumatic rod 3, it can simultaneously drive the conical head 7 at the top to descend. In this way, the descending conical head 7 can open the tension sleeve 5, so that the tension sleeve 5 is in an expanded and open state. In this way, the opened tension sleeve 5 can tighten and fix the shoe last center hole inserted outside it, thereby effectively preventing the shoe last from coming off the tension sleeve 5, and has a good shoe last limiting effect, preventing the shoe last from sliding up and down. In practical use, this structure can effectively improve the positioning stability of the shoe last by tightening the expansion sleeve 5, preventing the shoe last from moving up and down on the expansion sleeve 5. This can effectively prevent the shoe last from sliding up and down when clamped, improve the overall stability of the positioning clamp of this utility model, and improve the use effect. Moreover, this utility model can drive the expansion sleeve 5 to tighten by pneumatic extension and retraction of the cylinder through the telescopic rod 6. Its working principle is simpler and the structure is more concise, effectively reducing the complexity of the mechanism, improving the use effect, reducing the manufacturing difficulty, and has good simplicity and practicality, effectively improving the performance of use.

[0034] When the expansion sleeve 5 expands and limits the center hole of the shoe last, the cylinders of the left clamping plate 8 and the right clamping plate 9 can work. When the cylinders work, they drive the left clamping plate 8 and the right clamping plate 9 to move closer to each other through the output rod. In this way, the two clamping plates that move closer to each other can position and clamp the outside of the shoe last from left to right, preventing the shoe last from rotating and improving clamping stability. By using the expansion structure in conjunction with this utility model, the positioning clamp can complete the expansion and fixation of the last and the clamping fixation from left to right. It has a dual positioning and clamping effect, which can effectively prevent the last from moving up and down and left and right. It has a better positioning and clamping effect and is more practical.

[0035] 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 pneumatic last positioning fixture, comprising a fixture base (1), characterized in that, A drive cylinder (2) is fixedly installed on the lower surface of the bottom end of the clamp base (1). A telescopic pneumatic rod (3) is provided at the output end of the drive cylinder (2). An upper bracket (4) is fixedly installed on the upper surface of the clamp base (1) by bolts. An expansion sleeve (5) is fixedly installed at the center of the upper surface of the upper bracket (4). A telescopic pull rod (6) is inserted inside the expansion sleeve (5). The telescopic pull rod (6) is slidably connected to the expansion sleeve (5) up and down. A conical head (7) is fixedly installed at the top of the telescopic pull rod (6). The bottom end of the telescopic pull rod (6) passes through the upper bracket (4) and is fixedly connected to the pneumatic rod (3) of the drive cylinder (2).

2. The pneumatic last positioning fixture according to claim 1, characterized in that: The upper support (4) adopts an inverted U-shaped structure design.

3. A pneumatic last positioning fixture according to claim 1, characterized in that: The telescopic rod (6) is slidably connected to the upper bracket (4).

4. A pneumatic last positioning fixture according to claim 1, characterized in that: The telescopic rod (6) and the conical head (7) adopt an integrated molding structure design.

5. A pneumatic last positioning fixture according to claim 1, characterized in that: A left clamping plate (8) is provided on one side of the upper bracket (4), and a right clamping plate (9) is provided on the other side of the upper bracket (4).

6. A pneumatic last positioning fixture according to claim 5, characterized in that: The output rod of the cylinder is fixedly connected to the outer walls of both the left clamp (8) and the right clamp (9).

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