Shoe tree centering and positioning mechanism

Abstract

The utility model provides a shoe tree centering and positioning mechanism which comprises a machine frame and a positive and negative tooth screw rod, the two ends of the positive and negative tooth screw rod are rotationally installed on the machine frame through bearings, and the positive and negative tooth screw rod is provided with a positive tooth screw rod section and a negative tooth screw rod section which are symmetrical to each other and are in threaded linkage with a positive tooth nut sleeve and a negative tooth nut sleeve respectively. The right-hand thread nut sleeve and the left-hand thread nut sleeve are in linkage with a first centering block and a second centering block respectively, the right-hand thread and left-hand thread lead screw is driven by a rotation driving mechanism to rotate, the first centering block and the second centering block are made to be close to each other or separated from each other, and centering positioning of a shoe tree is achieved. The rack is further provided with a detachable shoe last limiting block and a shoe last guide plate so that the shoe last can be further positioned. The rotation driving mechanism is linked with the positive and negative tooth lead screw through a chain, the first centering block and the second centering block are connected with the nut sleeve through the linkage block, the sliding block and the sliding rail, and the moving stability is improved. And the centering block is provided with a transverse centering plate, so that the centering accuracy is improved. The whole mechanism is low in cost, rapid centering and clamping can be achieved, and shoe tree positioning holes can be conveniently machined.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shoe tree centering positioning mechanism. BACKGROUND

[0002] A shoe tree is a model used for making shoes, and through the shoe tree, the shape and structure of the shoes can be maintained during the making process, ensuring that the shoes maintain the correct shape during the production process and provide a comfortable fit in the final form.

[0003] As disclosed in the Chinese utility model patent file with the publication number "CN207444402U", a through-hole structure injection shoe tree is disclosed, which is provided with two groups of positioning holes 2 on the shoe tree body. Figures 2 to 5 The positions of the positioning holes 2 can be clearly seen. These two groups of positioning holes are structures that must be processed during the manufacturing of the shoe tree, and the positioning holes are used to fix the mechanical arm with the shoe tree body, realizing the automatic operation of the shoe tree body movement. This is not only for the convenience of processing the shoe tree, but also for the need of the positioning holes in the process of using the shoe tree to produce shoes.

[0004] When the existing shoe tree is processed with the positioning holes, firstly, the upper end of the shoe tree must be exposed. Secondly, the plane of the upper end must be kept horizontal, otherwise the positioning holes processed will be inclined relative to the shoe tree, directly affecting the quality of the shoes. Therefore, when designing the corresponding shoe tree positioning mechanism, the above-mentioned factors must be considered. UTILITY MODEL CONTENT

[0005] The utility model provides a shoe tree longitudinal reference surface centering positioning mechanism, which can facilitate the processing of the positioning holes, has a simple structure, is low in overall mechanism cost, and realizes rapid centering and clamping.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a shoe tree centering positioning mechanism, comprising a rack, characterized by further comprising a forward and reverse toothed rod rotatably mounted on the rack through bearings, the forward and reverse toothed rod is sequentially provided with a forward toothed rod segment and a reverse toothed rod segment along the axial direction of the forward and reverse toothed rod, the forward toothed rod segment and the reverse toothed rod segment are symmetrically arranged, the forward toothed rod segment is threadedly connected with a forward toothed nut sleeve, the reverse toothed rod segment is threadedly connected with a reverse toothed nut sleeve, the forward toothed nut sleeve is connected with a first centering block, the reverse toothed nut sleeve is connected with a second centering block, the forward and reverse toothed rod is connected with a rotary driving mechanism capable of driving the forward and reverse toothed rod to rotate, when the rotary driving mechanism drives the forward and reverse toothed rod to rotate, the first centering block and the second centering block can approach or separate from each other.

[0007] The rotating driving mechanism (such as a motor, a hydraulic motor, etc.) is started to drive the positive and negative toothed lead screws to rotate. With the rotation of the positive and negative toothed lead screws, the positive and negative nut sleeves move on the positive and negative screw rod segments, respectively. Due to the opposite directions of the threads (the positive screw rod segment and the negative screw rod segment are symmetrically arranged), the two nut sleeves move in opposite directions, and the positive and negative nut sleeves are linked with the first and second centering blocks, respectively. Therefore, when the nut sleeves move, the centering blocks also move. When the positive and negative toothed lead screws rotate to make the two nut sleeves move towards each other, the two centering blocks also move towards each other until the shoe tree is clamped and positioned. Conversely, when the positive and negative toothed lead screws rotate to make the two nut sleeves move away from each other, the two centering blocks move away from each other to release the shoe tree. Through the shoe tree centering and positioning mechanism designed in the application, the upper end of the shoe tree is exposed, the positioning hole can be conveniently machined, the structure is simple, the whole mechanism has low cost, and quick centering and clamping can be realized.

[0008] The shoe tree centering and positioning mechanism can be further provided with a heel limiting block distributed below the middle part of the positive and negative toothed lead screws on the rack, and the heel limiting block is detachably connected with the rack through a screw.

[0009] The heel limiting block positions the heel part of the shoe tree in the horizontal plane, thereby preliminarily positioning the shoe tree in the correct position. The heel limiting block cooperates with the two sets of centering guiding and positioning blocks to realize multi-directional positioning of the shoe tree. The heel limiting block is detachably connected with the rack through a screw, thereby realizing quick disassembly and assembly of the heel limiting block to adapt to shoe trees of different specifications and types.

[0010] The shoe tree centering and positioning mechanism can be further provided with a shoe tree guiding plate below the heel limiting block, a strip-shaped positioning groove below the heel limiting block of the shoe tree guiding plate, the strip-shaped positioning groove extending towards the side edge of the shoe tree guiding plate, and the end part of the strip-shaped positioning groove being in an open shape.

[0011] The lower part of the shoe tree is provided with a guiding and positioning block that can be matched with the strip-shaped positioning groove. When the shoe tree is placed on the centering mechanism, the guiding and positioning block is inserted into the strip-shaped positioning groove of the shoe tree guiding plate. On the one hand, the shoe tree guiding plate can align the shoe tree, thereby further realizing guiding and positioning of the shoe tree. On the other hand, the guiding and positioning block is provided with a positioning reference plane on both sides, the shoe tree can be pressed by hand until the positioning reference planes on both sides of the guiding and positioning block contact with the plane of the shoe tree guiding plate, thereby ensuring that the upper end surface of the shoe tree is horizontal and ensuring that the two sets of positioning holes on the upper end of the shoe tree can be accurately machined.

[0012] The shoe tree centering and positioning mechanism can be further provided with a rotating driving mechanism including a driven sprocket linked with the end part of the positive and negative toothed lead screws, a driving sprocket linked with the driven sprocket through a chain, a hydraulic motor linked with the driving sprocket, and a body of the hydraulic motor mounted on the rack.

[0013] When the shoe last needs to be positioned, the hydraulic motor is started. The hydraulic motor drives the driving sprocket to rotate, and the driving sprocket is linked with the driven sprocket through the chain. When the driving sprocket rotates, the chain drives the driven sprocket to rotate synchronously, thereby driving the positive and negative tooth screw rod to rotate, and the two sets of centering blocks are close to each other, thereby positioning the shoe last.

[0014] The shoe last centering positioning mechanism can be further provided with a first linkage block sleeved on the outer periphery of the positive tooth nut sleeve, a first sliding block detachably connected to one side of the first linkage block through a screw, a sliding rail slidably matched with the first sliding block, the sliding rail being fixed on the rack and being parallel to the positive and negative tooth screw rod, and the other side of the first linkage block being detachably connected with the first centering block through a screw. The second linkage block is sleeved on the outer periphery of the negative tooth nut sleeve, a second sliding block is detachably connected to one side of the second linkage block through a screw, the second sliding block is slidably matched with the sliding rail, and the other side of the second linkage block is detachably connected with the second centering block through a screw.

[0015] The linkage block is an intermediate component connecting the nut sleeve and the sliding block, and can convert the movement of the nut sleeve into the movement of the sliding block. At the same time, the linkage block is detachably connected with the centering block through a screw, which facilitates the installation and disassembly of the centering block. Through the sliding rail, the first sliding block and the second sliding block, the stress on the positive and negative tooth screw rod is reduced, and the movement stability of the two sets of centering blocks is improved.

[0016] The shoe last centering positioning mechanism can be further provided with a first linkage block sleeved on the outer periphery of the positive tooth nut sleeve, a first sliding block detachably connected to one side of the first linkage block through a screw, a sliding rail slidably matched with the first sliding block, the sliding rail being fixed on the rack and being parallel to the positive and negative tooth screw rod, and the other side of the first linkage block being detachably connected with the first centering block through a screw.

[0017] The horizontal centering plate is provided to reduce the contact area between the centering block and the shoe last as much as possible, thereby improving the centering accuracy.

[0018] The shoe last centering positioning mechanism can be further provided with a first linkage block sleeved on the outer periphery of the positive tooth nut sleeve, a first sliding block detachably connected to one side of the first linkage block through a screw, a sliding rail slidably matched with the first sliding block, the sliding rail being fixed on the rack and being parallel to the positive and negative tooth screw rod, and the other side of the first linkage block being detachably connected with the first centering block through a screw.

[0019] The shoe last centering positioning mechanism can be further provided with a first linkage block sleeved on the outer periphery of the positive tooth nut sleeve, a first sliding block detachably connected to one side of the first linkage block through a screw, a sliding rail slidably matched with the first sliding block, the sliding rail being fixed on the rack and being parallel to the positive and negative tooth screw rod, and the other side of the first linkage block being detachably connected with the first centering block through a screw.

[0020] The shoe last centering positioning mechanism can be further provided with a first linkage block sleeved on the outer periphery of the positive tooth nut sleeve, a first sliding block detachably connected to one side of the first linkage block through a screw, a sliding rail slidably matched with the first sliding block, the sliding rail being fixed on the rack and being parallel to the positive and negative tooth screw rod, and the other side of the first linkage block being detachably connected with the first centering block through a screw. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the assembly state schematic view of the embodiment one of the utility model;

[0022] Figure 2 It is the explosion schematic view of the embodiment two of the utility model;

[0023] Figure 3 It is the working state schematic view of the embodiment two of the utility model;

[0024] Figure 4 It is the first pair of centering block partial structure explosion schematic view of the embodiment one, two of the utility model;

[0025] Figure 5 It is the shoe tree mentioned in the embodiment one, two of the utility model schematic view;

[0026] Label annotation: shoe tree a, guide positioning block a1, positioning reference plane a2;Positive and negative tooth screw rod 1, positive tooth screw segment 2, negative tooth screw segment 3, negative tooth nut sleeve 4, positive tooth nut sleeve 5, first centering block 6, vertical mounting plate 6a, horizontal centering plate 6b, second centering block 7, last heel limiting block 8, driven sprocket 9, driving sprocket 10, hydraulic motor 11, first linkage block 12, first mounting hole 12a, screw hole 12b, first sliding block 13, slide rail 14, second linkage block 15, second sliding block 16, shoe tree guide plate 17, strip-shaped positioning groove 17a. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] Embodiment one: the shoe tree a centering positioning mechanism shown in Figure 1 、 4 , including rack, two ends are rotationally installed on the rack through bearing positive and negative tooth screw rod 1, positive and negative tooth screw rod 1 is sequentially provided with positive tooth screw segment 2, negative tooth screw segment 3 along the axis direction of itself, positive tooth screw segment 2 and negative tooth screw segment 3 are symmetrically arranged, positive tooth screw segment 2 is threadedly linked with positive tooth nut sleeve 5, negative tooth screw segment 3 is threadedly linked with negative tooth nut sleeve 4, positive tooth nut sleeve 5 is linked with first centering block 6, negative tooth nut sleeve 4 is linked with second centering block 7, positive and negative tooth screw rod 1 is linked with the rotation driving mechanism capable of driving positive and negative tooth screw rod 1 to rotate, when the rotation driving mechanism drives positive and negative tooth screw rod 1 to rotate, first centering block 6 and second centering block 7 can approach or separate each other.

[0029] The rotation driving mechanism (such as a motor, a hydraulic motor, etc.) is started to drive the positive and negative toothed lead screw 1 to rotate. With the rotation of the positive and negative toothed lead screw 1, the positive and negative nut sleeves 5 and 4 move on the positive and negative screw rod segments 2 and 3 respectively. Since the thread directions are opposite (the positive and negative screw rod segments 2 and 3 are symmetrically arranged), the two nut sleeves will move in opposite directions, and the positive and negative nut sleeves 5 and 4 are linked with the first and second centering blocks 6 and 7 respectively. Therefore, when the nut sleeves move, the centering blocks will also move. When the positive and negative toothed lead screw 1 rotates to make the two nut sleeves move towards each other, the two centering blocks will also move towards each other until the shoe tree a is clamped and positioned. Conversely, when the positive and negative toothed lead screw 1 rotates to make the two nut sleeves move away from each other, the two centering blocks will move away from each other to release the shoe tree a. Through the shoe tree a centering and positioning mechanism provided in the embodiment, the upper end of the shoe tree a is exposed, the positioning hole can be conveniently machined, the structure is simple, the entire mechanism has low cost, and rapid centering and clamping can be realized.

[0030] The rack is also provided with a last heel limiting block 8 distributed below the middle part of the positive and negative toothed lead screw 1, which is detachably connected with the rack by screws. The last heel limiting block 8 positions the heel part of the shoe tree a in the horizontal plane, thereby preliminarily positioning the shoe tree a in the correct position. The last heel limiting block 8 cooperates with the two sets of centering guide positioning blocks a1 to realize multi-directional positioning of the shoe tree a. The last heel limiting block 8 is detachably connected with the rack by screws, so that the last heel limiting block 8 can be quickly disassembled to adapt to shoe trees a of different specifications and types.

[0031] The rotation driving mechanism includes a driven sprocket 9 linked with the end part of the positive and negative toothed lead screw 1. The driven sprocket 9 is linked with a driving sprocket 10 through a chain (not shown in the figure), and the driving sprocket 10 is linked with a hydraulic motor 11. The body of the hydraulic motor 11 is installed on the rack. When it is needed to position the shoe tree a, the hydraulic motor 11 is started. The hydraulic motor 11 drives the driving sprocket 10 to rotate, and the driving sprocket 10 is linked with the driven sprocket 9 through the chain. When the driving sprocket 10 rotates, the chain drives the driven sprocket 9 to rotate synchronously, thereby driving the positive and negative toothed lead screw 1 to rotate, and the two sets of centering blocks move towards each other to center and position the shoe tree a.

[0032] A first linkage block 12 is fitted around the outer periphery of the orthogonal threaded nut sleeve 5. A first slider 13 is detachably connected to one side of the first linkage block 12 via screws. The first slider 13 is slidably engaged with a slide rail 14, which is fixed to the frame and parallel to the orthogonal and reversible threaded rods 1. The other side of the first linkage block 12 is detachably connected to a first centering block 6 via screws. A second linkage block 15 is fitted around the outer periphery of the reversible threaded nut sleeve 4. A second slider 16 is detachably connected to one side of the second linkage block 15 via screws. The second slider 16 is slidably engaged with the slide rail 14. The other side of the second linkage block 15 is detachably connected to a second centering block 7 via screws. As an intermediate component connecting the nut sleeve and the slider, the linkage block converts the movement of the nut sleeve into the movement of the slider. Simultaneously, the linkage block is detachably connected to the centering block via screws, facilitating the installation and removal of the centering block. Through the slide rail 14, the first slider 13, and the second slider 16, the stress on the orthogonal and reversible threaded rods 1 is reduced, while the movement stability of the two sets of centering blocks is improved.

[0033] The first centering block 6 includes a vertical mounting plate 6a and a horizontal centering plate 6b. The vertical mounting plate is detachably connected to the first linkage block 12 by screws. The horizontal centering plate 6b is distributed above one side of the vertical mounting plate 6a and the two are integrally formed. The horizontal centering plate 6b is set to minimize the contact area between the centering block and the shoe last a, thereby improving the centering accuracy.

[0034] The first linkage block 12 has a first mounting hole 12a extending through it. The first mounting hole 12a is arranged parallel to the axis of the positive and negative threaded rod 1. The positive threaded nut sleeve 5 is inserted into the first mounting hole 12a. The first linkage block 12 also has screw holes 12b symmetrically distributed on both sides of the first mounting hole 12a. The second linkage block 15 has a second mounting hole extending through it. The second mounting hole is arranged parallel to the axis of the positive and negative threaded rod 1. The negative threaded nut sleeve 4 is inserted into the second mounting hole. The second linkage block 15 also has screw holes 12b symmetrically distributed on both sides of the second mounting hole. This facilitates the disassembly, assembly, and positioning of the nut sleeve and the linkage block.

[0035] Example 1 Operation method: Place the shoe last a between the two sets of centering blocks, and make the heel part of the shoe last a contact with the heel limiting block 8. Then, the hydraulic motor 11 drives the positive and negative threaded rods 1 to rotate, and the two sets of centering blocks move closer to each other until the upper end of the shoe last a is clamped.

[0036] Example 2: Figures 2 to 4 The shoe last a centering and positioning mechanism shown includes all the technical features of Embodiment 1, and further includes the following: a shoe last guide plate 17 is provided below the heel limiting block 8, and a strip positioning groove 17a is provided below the heel limiting block 8 on the shoe last guide plate 17. The strip positioning groove 17a extends toward the side of the shoe last guide plate 17 and its end is open. Figure 5As shown, the lower part of the shoe tree a is provided with a guide positioning block a1 which can be fitted with the strip-shaped positioning slot 17a, when the shoe tree a is placed on the centering mechanism, the guide positioning block a1 will be inserted into the strip-shaped positioning slot 17a of the shoe tree guide plate 17. On the one hand, the shoe tree guide plate 17 can align the shoe tree a, further realizing the guidance and positioning of the shoe tree a; on the other hand, the guide positioning block a1 is provided with a positioning reference plane a2 on both sides, which can be pressed down by hand until the positioning reference plane a2 on both sides of the guide positioning block a1 is in contact with the plane of the shoe tree guide plate 17, ensuring that the upper end surface of the shoe tree a is horizontal, ensuring that the upper end of the shoe tree a can accurately process two sets of positioning holes.

[0037] The operation method of embodiment two is as follows: the shoe tree a is placed between the two sets of centering blocks, and the heel part of the shoe tree a is in contact with the tree heel limiting block 8. At the same time, the guide positioning block a1 below the shoe tree a is inserted into the strip-shaped positioning slot 17a of the shoe tree guide plate 17, at this time the strip-shaped positioning slot 17a aligns the shoe tree a. Then the hydraulic motor 11 drives the forward and reverse toothed rod 1 to rotate, the two sets of centering blocks move closer to each other, until the upper end of the shoe tree a is clamped, and the shoe tree a is centered.

[0038] In summary, compared with embodiment one, embodiment two can guide and position the shoe tree a in multiple directions.

Claims

1. A last centering positioning mechanism comprising a frame, characterized in that: Also include two ends through the bearing rotationally mounted to the rack positive and negative tooth screw rod, the positive and negative tooth screw rod along the axis direction in turn provided with positive tooth screw segment, negative tooth screw segment, the positive tooth screw segment and negative tooth screw segment are symmetrically arranged, the positive tooth screw segment is threadedly linked with the positive tooth nut sleeve, the negative tooth screw segment is threadedly linked with the negative tooth nut sleeve, the positive tooth nut sleeve is linked with the first centering block, the negative tooth nut sleeve is linked with the second centering block, the positive and negative tooth screw rod is linked with the rotary drive mechanism capable of driving the positive and negative tooth screw rod to rotate, when the rotary drive mechanism drives the positive and negative tooth screw rod to rotate, the first centering block and the second centering block can be close to each other or separate.

2. The last centering positioning mechanism of claim 1, wherein: The rack is also provided with a last heel limiting block distributed below the middle part of the positive and negative tooth screw rod, and the last heel limiting block is detachably connected to the rack by screws.

3. The last centering positioning mechanism of claim 2, wherein: A shoe last guide plate is arranged below the last heel limiting block, and a strip-shaped positioning groove is arranged below the last heel limiting block of the shoe last guide plate, the strip-shaped positioning groove extends towards the side edge of the shoe last guide plate, and the end of the strip-shaped positioning groove is in an open shape.

4. The last centering positioning mechanism according to any one of claims 1 to 3, characterized in that: The rotary drive mechanism comprises a driven sprocket linked with the end of the positive and negative tooth screw rod, the driven sprocket is linked with a driving sprocket through a chain, the driving sprocket is linked with a hydraulic motor, and the body of the hydraulic motor is mounted on the rack.

5. The last centering positioning mechanism of claim 4, wherein: A first linkage block is arranged on the outer periphery of the positive tooth nut sleeve, one side of the first linkage block is detachably connected to a first sliding block by screws, the first sliding block is slidingly fitted with a sliding rail, the sliding rail is fixed to the rack and parallel to the positive and negative tooth screw rod, and the other side of the first linkage block is detachably connected to the first centering block by screws; a second linkage block is arranged on the outer periphery of the negative tooth nut sleeve, one side of the second linkage block is detachably connected to a second sliding block by screws, the second sliding block is slidingly fitted with the sliding rail, and the other side of the second linkage block is detachably connected to the second centering block by screws.

6. The last centering positioning mechanism of claim 5, wherein: The first centering block comprises a vertical mounting plate and a horizontal centering plate, the vertical mounting plate is detachably connected to the first linkage block by screws, and the horizontal centering plate is arranged above one side of the vertical mounting plate and integrally formed with the vertical mounting plate.

7. The last centering positioning mechanism of claim 5, wherein: A first mounting hole is arranged in the first linkage block, the first mounting hole is arranged in parallel to the axis direction of the positive and negative tooth screw rod, the positive tooth nut sleeve is inserted into the first mounting hole, screw holes are symmetrically arranged on the first linkage block and located on both sides of the first mounting hole; a second mounting hole is arranged in the second linkage block, the second mounting hole is arranged in parallel to the axis direction of the positive and negative tooth screw rod, the negative tooth nut sleeve is inserted into the second mounting hole, and screw holes are symmetrically arranged on the second linkage block and located on both sides of the second mounting hole.

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