Auxiliary expansion clamp for leather sheath

Abstract

The auxiliary expanding clamp for the leather sheath comprises a base plate, an installation plate is fixedly arranged on the front end face of the base plate, a power assembly is fixedly arranged on the rear end face of the base plate, a flaring assembly is fixedly arranged on the front end face of the installation plate, and the flaring assembly comprises a rotating disc piece and a flaring rod piece arranged on the periphery of the rotating disc piece in a surrounding mode. According to the auxiliary expansion clamp, a rigid supporting structure is formed through stable connection of the base plate and the mounting plate, and the coaxial direct-drive design of a motor part and a rotating disc part in the power assembly is combined, so that high efficiency and operation stability of power transmission are achieved; according to the flaring assembly, the uniformity of circumferential stress in the flaring process is ensured, deformation or damage caused by local stress concentration of the leather sheath is effectively avoided, the overall structure has compactness and function integration degree, expansion requirements of leather sheaths of different specifications can be met, the operation efficiency is greatly improved through automatic flaring, meanwhile, the manual operation intensity is reduced, and the production cost is reduced. And the production cost is reduced on the basis of ensuring the flaring quality consistency.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, specifically to an auxiliary expansion clamp for leather cases. Background Technology

[0002] As described in the published patent CN108819211B, before the finished product is produced, a workpiece 2 (leather sleeve) needs to be fitted onto the outside of the workpiece 1 (plastic ring). This leather sleeve is a rubber product with a certain degree of elasticity, thereby protecting the workpiece 1. Since the inner diameter of the leather sleeve is less than or equal to the outer diameter of the workpiece 1 under normal conditions, assembly is not possible. The common method is to expand the leather sleeve and then assemble it onto the workpiece 1. However, the current leather sleeve assembly equipment has a complex structure and high cost. Therefore, how to improve a leather sleeve assembly device with a simple and reasonable structure and low cost has become a technical problem that the industry urgently needs to solve.

[0003] In summary, a leather sleeve needs to be put on the outside of the cylindrical workpiece before it is finished. The current production method of manually putting on the leather sleeve has the problem of assembly difficulties, while purchasing leather sleeve assembly equipment has the problem of high production costs. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution for an auxiliary expansion clamp for leather cases that can solve the aforementioned problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An auxiliary expansion clamp for a leather case includes a base plate, a mounting plate fixed to the front end face of the base plate, a power assembly fixed to the rear end face of the base plate, and a flaring assembly fixed to the front end face of the mounting plate.

[0007] The flaring assembly includes a turntable and flaring rods surrounding the turntable. A through-hole is provided on the mounting plate, and the turntable rotates within the mounting hole. Multiple equidistant grooves are provided on the front end face of the mounting plate, surrounding the turntable. The axis of the grooves passes through the center of the turntable, and the flaring rods slide within the grooves. Multiple arc-shaped protrusions are formed equidistantly on the periphery of the turntable, and the multiple arc-shaped protrusions slide and abut against the multiple flaring rods respectively.

[0008] The power assembly includes a motor component fixedly mounted on the rear end face of the base plate, and the working shaft of the motor component is fixedly connected to the turntable component.

[0009] As a further scheme of the utility model: a plurality of through lifting installation holes are formed on the mounting plate, the plurality of lifting installation holes are equidistantly arranged around the periphery of the rotating disc part, the flaring assembly further comprises a lifting rod part installed in the lifting installation hole, and the power assembly further comprises a telescopic cylinder part fixedly arranged on the rear end surface of the base plate, a working shaft of the telescopic cylinder part is fixedly arranged with the lifting rod part, and the lifting rod part is in abutting cooperation with the inner ring of the leather sheath.

[0010] As a further scheme of the utility model: a first arc-shaped positioning groove recessed downward is arranged on the outer wall of the flaring rod part, the first arc-shaped positioning groove extends downward from the upper end of the flaring rod part, and a first round corner is arranged at the joint of the first arc-shaped positioning groove and the upper end of the flaring rod part.

[0011] As a further scheme of the utility model: a second arc-shaped positioning groove of S type is arranged on the outer wall of the lifting rod part, the second arc-shaped positioning groove extends downward from the upper end of the lifting rod part, and a second round corner is arranged at the joint of the second arc-shaped positioning groove and the upper end of the lifting rod part.

[0012] As a further scheme of the utility model: a through gap slot is arranged on the inner wall of the lifting rod part, and the outer edge of the rotating disc part is accommodated in the gap slot.

[0013] As a further scheme of the utility model: an elastic abutting hole is formed on the rotating disc part, a wave bead screw part is fixedly arranged in the elastic abutting hole, a plurality of limiting holes are equidistantly formed on the front end surface of the mounting plate, and the wave bead screw part is in elastic abutting cooperation in the limiting hole.

[0014] As a further scheme of the utility model: round corner parts are arranged on the two sides of the inner wall of the flaring rod part, and the round corner parts are in abutting cooperation with the arc-shaped protrusions.

[0015] As a further scheme of the utility model: mounting blocks protruding rearward are formed on the two sides of the rear end surface of the base plate.

[0016] Compared with the prior art, the utility model has the advantages of the following:

[0017] The auxiliary expansion clamp is firmly connected with the mounting plate to form a rigid support structure, the motor part and the rotating disc part in the power assembly are coaxially directly driven, the efficiency of power transmission and the operation stability are realized, the flaring assembly ensures the uniformity of circumferential stress in the flaring process, deformation or damage caused by local stress concentration of the leather sheath is effectively avoided, the overall structure is compact and has high functional integration, the expansion demand of different specifications of leather sheaths can be met, the operation efficiency is greatly improved through automatic flaring, the manual operation strength is reduced, the production cost is reduced on the basis of ensuring the consistency of flaring quality. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the structure perspective view of the utility model;

[0019] Figure 2 is another structural perspective view of the utility model;

[0020] Figure 3 is a top view of the utility model;

[0021] Figure 4 is Figure 3 sectional view along direction A-A;

[0022] The reference signs and names in the drawings are as follows:

[0023] Base plate 100, mounting plate 101, power assembly 102, flared assembly 103, turntable piece 104, flared rod 105, turntable mounting hole 106, sliding groove 107, arc-shaped protrusion 108, motor piece 109, lifting mounting hole 111, lifting rod piece 112, telescopic cylinder piece 113, first arc-shaped positioning groove 114, first round corner 115, second arc-shaped positioning groove 116, second round corner 117, give-way groove 118, elastic abutment hole 119, wave bead screw piece 120, limiting hole 121, round corner part 122, mounting block 123. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. 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 those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Please refer to Figures 1-4 A kind of auxiliary expansion clamp for leather sheath, including base plate 100, the front end surface of base plate 100 is fixedly provided with mounting plate 101, the rear end surface of base plate 100 is fixedly provided with power assembly 102, the front end surface of mounting plate 101 is fixedly provided with flared assembly 103;

[0026] Flared assembly 103 includes turntable piece 104 and flared rod 105 piece around the circumference of turntable piece 104, mounting plate 101 is provided with the through turntable mounting hole 106, turntable piece 104 is rotationally fitted in turntable mounting hole 106, the front end surface of mounting plate 101 is provided with multiple equidistantly around the circumference of turntable piece 104 sliding groove 107, the axis of sliding groove 107 passes through the center of turntable piece 104, flared rod 105 piece is slidingly installed in sliding groove 107, multiple arc-shaped protrusions 108 are equidistantly formed on the circumference of turntable piece 104, and the multiple arc-shaped protrusions 108 and multiple flared rod 105 pieces are respectively slidingly abutted and fitted;

[0027] The power assembly 102 comprises a motor piece 109 fixed on the rear end surface of the base plate 100, and the working shaft of the motor piece 109 is fixedly connected with the rotating disc piece 104;

[0028] The auxiliary expansion clamp has the advantages that the system structure design, the precise motion control and the high-efficiency power transmission are combined;

[0029] The base plate 100 and the mounting plate 101 are connected through high-strength rigid connection to form a stable three-dimensional support frame, which not only provides a deformation-resistant mechanical basis for the expansion operation, but also realizes integrated design of motion guidance and load bearing through the radial slide grooves 107 group on the front end surface of the mounting plate 101, the axis of the slide grooves 107 passes through the center of the rotating disc, so that the expansion rod 105 is always linearly displaced along the preset geometric track during the radial movement, and the friction loss and positioning deviation caused by lateral deviation are eliminated.

[0030] The power assembly 102 adopts the coaxial direct drive structure of the motor piece 109 and the rotating disc piece 104, realizes instantaneous response and linear controllability of power output, and combines the arc-shaped blocks 108 group distributed at equal angles on the periphery of the rotating disc, so that the arc-shaped block 108 profile converts the rotary motion into smooth radial thrust of the expansion rod 105 at the moment of contact, and the thrust curve is smooth and continuous, avoiding damage of impact load to the sheath material.

[0031] The expansion rod 105 array realizes high-precision synchronization under the cooperation of the rotating disc-arc-shaped block 108-slide groove 107, the radial displacement deviation of all expansion rods 105 is small, the sheath is uniformly expanded at all points in the circumferential direction, and the problems of uneven material stretching, local wrinkling or stress cracking caused by expansion are avoided.

[0032] The modular design of the expansion assembly 103 supports quick replacement of rotating discs and expansion rod 105 combinations of different diameter specifications, and through adjustment of the curvature radius of the arc-shaped block 108 and the length of the slide groove 107, the sheath of multiple specifications can be covered.

[0033] The overall structure adopts a composite material scheme of wear-resistant hard alloy and self-lubricating bearing, which can still maintain the stability of the motion pair gap in long-term high-frequency operation, and cooperates with the protective shell and the intelligent overload protection mechanism to significantly improve the service life and operation safety of the equipment.

[0034] The utility model discloses auxiliary expansion clamp passes through the stable connection of base plate 100 and mounting plate 101 and forms rigid support structure, and the coaxial direct drive design of motor piece 109 and carousel piece 104 in power assembly 102 is combined, realizes the high efficiency and operating stability of power transmission, and the flaring assembly 103 ensures the uniformity of circumferential stress in the flaring process, effectively avoids the deformation or damage caused by local stress concentration of the sheath, and the overall structure has compactness and function integration, which can adapt to the expansion demand of different specifications of sheath, greatly improve the operation efficiency through automatic flaring, reduce the manual operation strength, reduce the production cost on the basis of guaranteeing the consistency of flaring quality.

[0035] In the embodiment of the utility model, a plurality of through lifting installation holes 111 are formed on the mounting plate 101, and the plurality of lifting installation holes 111 are arranged equidistantly around the periphery of the carousel piece 104, the flaring assembly 103 further comprises a lifting rod piece 112 installed in the lifting installation hole 111, and the power assembly 102 further comprises a telescopic cylinder piece 113 fixedly arranged on the rear end surface of the base plate 100, the working shaft of the telescopic cylinder piece 113 is fixedly arranged with the lifting rod piece 112, and the lifting rod piece 112 is in abutting cooperation with the inner ring of the sheath.

[0036] The utility model discloses through the collaborative working mechanism of lifting rod piece 112 and telescopic cylinder piece 113, on the basis of radial flaring, the axial expansion dimension is superimposed, the multi-stage composite flaring effect is formed, and the forming precision and structural stability of the complex sheath are significantly improved.

[0037] The concentric layout of the equidistantly distributed lifting installation holes 111 on the mounting plate 101 and the carousel piece 104 forms a spatially staggered mechanical action network of the lifting rod piece 112 and the flaring rod 105, wherein the telescopic cylinder piece 113 pushes the lifting rod piece 112 to accurately lift along the axis of the lifting installation hole 111 through the rigid direct drive mode, after the flaring rod 105 completes radial flaring, the lifting rod piece 112 inserts into the inner ring of the sheath with a preset stroke and applies radial expansion force, and the problem of over-tightness in the sheath material joint process is effectively eliminated through radial multi-directional superimposed expansion.

[0038] The end of the lifting rod adopts involute curved surface design and forms progressive contact with the inner wall of the sheath, and the closed-loop regulation of the cylinder pressure and displacement of the servo control system ensures that the pressure gradient during the expansion process is always lower than the material yield threshold, avoiding the inner wall scratching or tearing.

[0039] The time and space action sequence of the lifting rod and the flaring rod 105 is optimized kinematically, and the cylinder synchronous action is triggered when the carousel rotates to the specified angle, ensuring seamless connection of the two-stage flaring action.

[0040] The modular design of the lifting assembly allows for quick replacement of lifting rods of different diameters. By adjusting the ratio between the cylinder stroke and the radial displacement of the 105-piece flaring rod, adaptive flaring control can be achieved from thin-walled elastomers to thick-walled composite materials. This composite flaring mechanism is particularly suitable for the precision assembly of asymmetrical irregular-shaped leather sleeves.

[0041] In this embodiment of the utility model, the outer wall of the flared rod 105 is provided with a recessed first arc-shaped positioning groove 114. The first arc-shaped positioning groove 114 extends downward from the upper end of the flared rod 105, and a first rounded corner 115 is provided at the junction of the first arc-shaped positioning groove 114 and the upper end of the flared rod 105.

[0042] In this embodiment of the invention, the first arc-shaped positioning groove 114 and the first rounded corner 115 structure provided on the outer wall of the flaring rod 105 significantly improve the positioning accuracy and equipment reliability of the flaring operation through the synergistic optimization of geometric morphology.

[0043] The first arc-shaped positioning groove 114 extends along the axial direction of the flared rod 105 and forms a continuous and close contact with the outer wall of the sleeve. This allows the sleeve material to extend evenly along the groove surface during the flaring process, effectively suppressing the deviation caused by circumferential sliding, eliminating the stress concentration effect of traditional right-angle edges, avoiding indentations or micro-cracks on the sleeve surface when the flared rod 105 moves repeatedly, and reducing the risk of fatigue failure of the rod itself under alternating loads.

[0044] During the flaring stage, the leather sleeve is positioned using the first arc-shaped positioning groove 114.

[0045] In this embodiment of the utility model, the outer wall of the lifting rod 112 is provided with an S-shaped second arc-shaped positioning groove 116. The second arc-shaped positioning groove 116 extends downward from the upper end of the lifting rod 112, and a second rounded corner 117 is provided at the junction of the second arc-shaped positioning groove 116 and the upper end of the lifting rod 112.

[0046] In this embodiment of the invention, the S-shaped second arc-shaped positioning groove 116 and the second rounded corner 117 structure provided on the outer wall of the lifting rod 112 significantly enhance the dynamic stability and material adaptability of the flared opening through biomimetic curved surface design and stress optimization.

[0047] The second arc-shaped positioning groove 116 with continuous S-shaped curvature forms a gradual guide trajectory along the axial direction of the lifting rod 112. Its three-dimensional curved surface structure can guide the inner wall material of the sleeve to flow orderly along the preset path during the lifting process, effectively offsetting the torsional deformation caused by non-expansion, and making the flaring process smoother.

[0048] It is especially suitable for high-precision flaring operations on difficult-to-process leather sleeves such as super-elastic silicone and multi-layer composite materials.

[0049] In this embodiment of the utility model, the inner wall of the lifting rod 112 is provided with a through clearance groove 118, and the outer edge of the turntable 104 is accommodated in the clearance groove 118.

[0050] By setting the clearance groove 118, interference between the lifting rod 112 and the turntable 104 is avoided.

[0051] In this embodiment of the utility model, the turntable 104 is provided with an elastic abutment hole 119, and a ball screw 120 is fixedly installed in the elastic abutment hole 119. A ring of limiting holes 121 are provided at equal intervals on the front end face of the mounting plate 101, and the ball screw 120 is elastically abutted and engaged in the limiting hole 121.

[0052] By using ball screws 120, the position of the mounting plate 101 can be maintained after it is rotated to the predetermined position, making the flaring process more stable.

[0053] In this embodiment of the utility model, rounded corner portions 122 are provided on both sides of the inner wall of the flared rod 105, and the rounded corner portions 122 abut against the arc-shaped protrusion 108.

[0054] The abutting engagement between the rounded corner 122 and the arc-shaped protrusion 108 makes the radial flaring sliding of the flaring rod 105 smoother.

[0055] In this embodiment of the present invention, mounting blocks 123 protruding rearward are respectively formed on both sides of the rear end face of the substrate 100.

[0056] This facilitates the mounting, fixing, and circumferential positioning of the substrate 100 on the worktable.

[0057] 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. An auxiliary expansion jig for a skin cover, characterized by, The application relates to a power-driven flaring device, which comprises a base plate (100), a mounting plate (101) fixed to the front end surface of the base plate (100), a power assembly (102) fixed to the rear end surface of the base plate (100), and a flaring assembly (103) fixed to the front end surface of the mounting plate (101). The flaring assembly (103) comprises a rotating disc part (104) and flaring rods (105) arranged around the periphery of the rotating disc part (104), the mounting plate (101) is provided with a rotating disc mounting hole (106) penetrating through the mounting plate (101), the rotating disc part (104) is rotationally arranged in the rotating disc mounting hole (106), the front end surface of the mounting plate (101) is provided with a plurality of slide grooves (107) equidistantly arranged around the periphery of the rotating disc part (104), the axis of the slide grooves (107) passes through the center of the rotating disc part (104), the flaring rods (105) are slidingly arranged in the slide grooves (107), and a plurality of arc-shaped protrusions (108) are equidistantly formed on the periphery of the rotating disc part (104) and are in sliding abutting connection with the flaring rods (105) respectively. The power assembly (102) comprises a motor part (109) fixed to the rear end surface of the base plate (100), and the working shaft of the motor part (109) is fixedly connected with the rotating disc part (104).

2. A secondary expansion jig for a holster according to claim 1, wherein, The mounting plate (101) is provided with a plurality of lifting mounting holes (111) penetrating through the mounting plate (101), the lifting mounting holes (111) are equidistantly arranged around the periphery of the rotating disc part (104), the flaring assembly (103) further comprises lifting rods (112) arranged in the lifting mounting holes (111), and the power assembly (102) further comprises a telescopic air cylinder part (113) fixed to the rear end surface of the base plate (100), the working shaft of the telescopic air cylinder part (113) is fixedly arranged with the lifting rods (112), and the lifting rods (112) are in abutting connection with the inner ring of the sheath.

3. A secondary expansion jig for a holster according to any of claims 1-2, wherein, The outer wall of the flaring rod (105) is provided with a first arc-shaped positioning groove (114) concave downward, the first arc-shaped positioning groove (114) extends downward from the upper end of the flaring rod (105), and the first arc-shaped positioning groove (114) is provided with a first round corner (115) at the joint with the upper end of the flaring rod (105).

4. A secondary expansion jig for a holster according to claim 3, wherein, The outer wall of the lifting rod (112) is provided with a second arc-shaped positioning groove (116) in S shape, the second arc-shaped positioning groove (116) extends downward from the upper end of the lifting rod (112), and the second arc-shaped positioning groove (116) is provided with a second round corner (117) at the joint with the upper end of the lifting rod (112).

5. A secondary expansion jig for a holster according to claim 4, wherein, The inner wall of the lifting rod (112) is provided with a through letting-in groove (118), and the outer edge of the rotating disc part (104) is accommodated in the letting-in groove (118).

6. A secondary expansion jig for a holster according to claim 1 or 2 or 5, wherein, The rotating disc part (104) is provided with elastic abutting holes (119), the elastic abutting holes (119) are fixedly arranged with wave bead screws (120), and the front end surface of the mounting plate (101) is provided with a ring of limiting holes (121) equidistantly arranged, the wave bead screws (120) are in elastic abutting connection in the limiting holes (121).

7. A secondary expansion jig for a holster according to claim 6, wherein, The inner wall of the flaring rod (105) is provided with round corner parts (122) on both sides, and the round corner parts (122) are in abutting connection with the arc-shaped protrusions (108).

8. A secondary expansion jig for a holster according to claim 7, wherein, Respectively, the back end face of the substrate (100) is shaped with the mounting block (123) which protrudes backward.

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