Lifting device for lower die of dotter

Abstract

The utility model discloses a button punching machine lower die lifting device which comprises a fixing plate, a lifting assembly and a driving mechanism, the lifting assembly and the driving mechanism are installed on the upper side and the lower side of the fixing plate respectively, and the lifting assembly comprises a lifting mechanism and a button die installed on the lifting mechanism. The lifting mechanism comprises a cylindrical cam table connected with the driving mechanism and a limiting seat fixedly connected with the fixing plate, the cam table can rotate around the axis of the cam table under the action of the driving mechanism, and the top face of the cam table is in a spiral shape in smooth transition from bottom to top along the side wall of the cam table. According to the lower die lifting device of the dotter, combination is carried out through reasonable and ingenious structural configuration, the production cost of the device is reduced while the accuracy of the lifting height of the lower die is guaranteed so as to guarantee the consistency of stamping pressure, and the overall automation degree, the accuracy and the operation convenience are higher.

Description

Technical Field

[0001] The utility model relates to the technical field of button-making equipment, in particular to a lower die lifting device for a button-making machine. Background Art

[0002] A button-setting machine, also known as a button-attaching machine, is mainly used for binding various buttons. Its main principle is to use a stamping structure to press the sub-buttons and female buttons onto the fabric. Therefore, a button-setting machine often requires an upper mold and a lower mold to push the sub-buttons and female buttons, as well as a lifting device for driving the upper and lower molds.

[0003] At present, the lower die lifting device of conventional button punching generally adopts a simple sliding block or piston rod and other structures. Although it can also play a lifting role, for smaller products such as buttons, it is difficult to keep the lifting height completely consistent after each loading and unloading. This also causes the stamping pressure to change, which makes the stamping yield rate easily affected. If you want to ensure the consistency of the stamping pressure each time, the overall structure will be more complicated and the equipment production cost will be higher, which is difficult to meet the production and cost reduction needs of enterprises.

[0004] Therefore, in view of the above-mentioned technical problems, it is necessary to provide a new technical solution. Utility Model Content

[0005] The utility model aims to provide a lower die lifting device for a button punching machine which cleverly utilizes structural improvement to reduce production costs and ensures consistency of punching pressure.

[0006] In order to solve the above technical problems, the present invention provides a lower die lifting device for a button machine, and the specific technical solution is as follows:

[0007] The lifting device of the lower mold of a button-making machine comprises a fixed plate and a lifting assembly and a driving mechanism respectively installed on the upper and lower sides of the fixed plate. The lifting assembly comprises a lifting mechanism and a button mold installed on the lifting mechanism. The lifting mechanism comprises a cylindrical cam platform connected to the driving mechanism and a limit seat fixedly connected to the fixed plate. The cam platform can rotate around its own axis under the action of the driving mechanism. The top surface of the cam platform is a spiral shape that smoothly transitions from bottom to top along the side wall of the cam platform. The limit seat comprises a limiting sleeve fixed above the cam platform. A lifting column is fixedly connected to the bottom of the button mold. A through hole parallel to the axial direction of the cam platform and with a diameter adapted to the lifting column is opened in the center of the limiting sleeve. The lifting column extends through the through hole to the cam platform, and the bottom end of the lifting column is placed on the top surface of the cam platform.

[0008] Preferably, a plurality of cam steps are provided at the end of the top surface of the cam platform along the spiral direction of the top surface of the cam platform, and the cam steps are smoothly transitioned with circular arc chamfers.

[0009] Preferably, the lifting mechanism further comprises a connecting handle arranged parallel to the lifting column and located outside the cam platform, the top end of the connecting handle is fixedly connected to the bottom end of the lifting column, a spiral groove parallel to the top surface of the cam platform is provided on the outer wall of the cam platform, and a fixed wheel is rotatably fixed on the side of the connecting handle close to the cam platform, the fixed wheel is located in the spiral groove and the diameter of the fixed wheel is smaller than the width of the spiral groove.

[0010] Preferably, the limit seat also includes a strip-shaped limit frame arranged parallel to the lifting column and the connecting handle, the limit frame is located on the side of the cam platform, and the top end of the limit frame is connected and fixed to the limit sleeve, the bottom end of the limit frame is connected and fixed to the fixed plate, the connecting handle is located between the cam platform and the limit frame, and a strip hole parallel to the height direction of the cam platform is opened on the limit frame, and a limit wheel is rotatably fixedly installed on the side of the connecting handle close to the limit frame, the limit wheel is located in the strip hole and the diameter of the limit wheel is adapted to the strip hole.

[0011] Preferably, the connecting handle includes a strip-shaped handle body parallel to the limit frame in the height direction, the fixed wheel and the limiting wheel are respectively installed on two opposite planes of the handle body, and a transmission arm is integrally connected to one side of the handle body. The transmission arm extends outward along the width direction of the handle body and forms a transmission surface. A die cylinder is also fixedly installed on the bottom side of the limiting sleeve, and the telescopic end of the die cylinder points to the transmission surface of the transmission arm.

[0012] Preferably, a first fixing pin is fixedly provided on the limiting sleeve, a second fixing pin is fixedly provided on the connecting handle, and a tension spring is connected between the first fixing pin and the second fixing pin.

[0013] Preferably, the first fixing pin and the second fixing pin are both provided with an engaging groove, and the two ends of the tension spring are respectively engaged in the engaging grooves of the first fixing pin and the second fixing pin, the second fixing pin is located at the center of the connecting handle, and the limiting wheel is rotatably sleeved on the outside of the second fixing pin.

[0014] Preferably, a fixing groove is provided at the bottom end of the lifting column, and the top of the connecting handle is fastened in the fixing groove by at least two fixing bolts. The bottom end of the connecting handle is fixedly connected to a side surface close to the limit frame, and the limit column is located in the strip hole of the limit frame and the diameter of the limit column is smaller than the width of the strip hole.

[0015] Preferably, a mounting seat is also provided on the fixed plate, the bottom end of the limit frame is connected and fixed to the mounting seat, the cam platform is fixed on the mounting seat and the bottom center of the cam platform is fixedly connected to a transmission shaft that penetrates the mounting seat and the fixed plate, and the transmission shaft is connected to the driving mechanism to drive the cam platform to rotate.

[0016] Preferably, the driving mechanism is specifically a driving motor, and the driving shaft of the driving motor and the transmission shaft of the cam table are transmitted through a synchronous belt. A plurality of fixed blocks are also fixedly installed on the driving motor, and the fixed blocks are located on the circumference of the synchronous belt and the end of the fixed blocks away from the driving motor is connected and fixed to the fixed plate.

[0017] The utility model provides a lower die lifting device for a button-making machine, which has the following beneficial effects:

[0018] The lower die lifting device of the button punching machine of the utility model is combined through a reasonable and ingenious structural configuration, which ensures the accuracy of the lower die lifting height to ensure the consistency of the stamping pressure while reducing the production cost of the device, and the overall degree of automation, accuracy and ease of operation are all higher;

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a structural diagram of a lower die lifting device for a button sewing machine;

[0022] Figure 2 for Figure 1 Schematic diagram of the structure of the lower die lifting device of the middle button machine (excluding the fixed plate);

[0023] Figure 3 for Figure 1 Exploded diagram of the middle lift assembly;

[0024] Figure 4 for Figure 3 Schematic diagram of the structure of the connecting handle.

[0025] Among them, 1-fixed plate; 11-mounting seat; 2-lifting mechanism; 21-cam platform; 211-cam step; 212-spiral groove; 22-limiting seat; 221-limiting frame; 222-limiting sleeve; 2221-first fixing pin; 23-connecting handle; 231-handle body; 232-fixing wheel; 233-limiting wheel; 2331-second fixing pin; 234-limiting column; 235-transmission arm; 24-tension spring; 25-die cylinder; 3-driving mechanism; 31-synchronous belt; 32-fixed block; 4-button mold; 41-lifting column; 411-fixing groove. DETAILED DESCRIPTION

[0026] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0027] Example

[0028] See also Figures 1 to 4 , a lower mold lifting device for a button-making machine comprises a fixed plate 1 and a lifting assembly and a driving mechanism 3 respectively installed on the upper and lower sides of the fixed plate, the lifting assembly comprises a lifting mechanism 2 and a button mold 4 installed on the lifting mechanism, the lifting mechanism 2 comprises a cylindrical cam platform 21 connected to the driving mechanism and a limit seat 22 fixedly connected to the fixed plate, the cam platform can rotate around its own axis under the action of the driving mechanism, the top surface of the cam platform is a spiral shape that smoothly transitions from bottom to top along the side wall of the cam platform, the limit seat comprises a limit sleeve 222 fixed above the cam platform, a lifting column 41 is fixedly connected to the bottom of the button mold, and a through hole is opened in the center of the limit sleeve that is parallel to the axial direction of the cam platform and has a diameter adapted to the lifting column, the lifting column extends through the through hole to the cam platform, and the bottom end of the lifting column is placed on the top surface of the cam platform.

[0029] The end of the top surface of the cam platform 21 is provided with a plurality of cam steps 211 along the spiral direction of the top surface of the cam platform, and the cam steps are smoothly transitioned with circular arc chamfers.

[0030] The lifting mechanism 2 also includes a connecting handle 23 arranged parallel to the lifting column and located on the outside of the cam platform. The top end of the connecting handle is fixedly connected to the bottom end of the lifting column. A spiral groove 212 parallel to the top surface of the cam platform is provided on the outer wall of the cam platform. A fixed wheel 232 is rotatably fixed on the side of the connecting handle close to the cam platform. The fixed wheel is located in the spiral groove and the diameter of the fixed wheel is smaller than the width of the spiral groove.

[0031] The limit seat 22 also includes a strip-shaped limit frame 221 arranged parallel to the lifting column and the connecting handle. The limit frame is located on the side of the cam platform, and the top of the limit frame is connected and fixed to the limit sleeve 222, and the bottom end of the limit frame is connected and fixed to the fixed plate 1. The connecting handle is located between the cam platform and the limit frame. A strip hole parallel to the height direction of the cam platform is opened on the limit frame. A limit wheel 233 is rotatably fixedly installed on the side of the connecting handle close to the limit frame. The limit wheel is located in the strip hole and the diameter of the limit wheel is adapted to the strip hole.

[0032] The connecting handle 23 includes a strip-shaped handle body 231 parallel to the limit frame in the height direction. The fixed wheel 232 and the limiting wheel 233 are respectively installed on two opposite planes of the handle body. A transmission arm 235 is integrally connected to one side of the handle body. The transmission arm extends outward along the width direction of the handle body and forms a transmission surface. A die cylinder 25 is also fixedly installed on the bottom side of the limiting sleeve 222, and the telescopic end of the die cylinder points to the transmission surface of the transmission arm.

[0033] A first fixing pin 2221 is fixedly provided on the limiting sleeve 222 , a second fixing pin 2331 is fixedly provided on the connecting handle 23 , and a tension spring 24 is connected between the first fixing pin and the second fixing pin.

[0034] The first fixing pin 2221 and the second fixing pin 2331 are both provided with an engaging groove, and the two ends of the tension spring are respectively engaged in the engaging grooves of the first fixing pin and the second fixing pin. The second fixing pin is located at the center of the connecting handle, and the limiting wheel 233 is rotatably sleeved on the outside of the second fixing pin.

[0035] A fixing groove 411 is provided at the bottom end of the lifting column 41, and the top of the connecting handle 23 is fastened in the fixing groove by at least two fixing bolts. Two or more fixing bolts can effectively prevent the connecting handle from rotating relative to each other during operation, thereby reducing the lifting error. The bottom end of the connecting handle is fixedly connected to a side surface close to the limit frame 221. The limit column is located in the strip hole of the limit frame and the diameter of the limit column is smaller than the width of the strip hole. The limit column is conducive to reducing the difficulty of installing the connecting handle and improving the installation effect of the connecting handle.

[0036] The fixed plate 1 is also provided with a mounting seat 11, the bottom end of the limit frame 221 is connected and fixed to the mounting seat, the cam platform 21 is fixed on the mounting seat and the bottom center of the cam platform is fixedly connected to a transmission shaft that penetrates the mounting seat fixed plate, and the transmission shaft is connected to the driving mechanism to drive the cam platform to rotate.

[0037] The driving mechanism 3 is specifically a driving motor, and the driving shaft of the driving motor and the transmission shaft of the cam table are transmitted through a synchronous belt 31. A number of fixed blocks 32 are also fixedly installed on the driving motor. The fixed blocks are located on the circumference of the synchronous belt and the end of the fixed blocks away from the driving motor is connected and fixed to the fixed plate.

[0038] The working principle of the lower mold lifting device of the button-making machine in this embodiment is that a driving motor is used to drive the cam table to rotate. During the rotation, the bottom end of the lifting column 41 is placed on the top surface of the cam table. Since the top surface of the cam table is in a spiral upward shape, the lifting column can drive the button mold 4 to rise and fall by utilizing the forward and reverse rotation of the cam table. The step surface at the end of the top surface of the cam table can increase the contact area of ​​the lifting column to prevent uneven force.

[0039] However, when the button mold driven by the driving motor is changed after the stamping is completed, if the motor is reversed to perform fine-tuning of the descent, it is first necessary to wait for the motor to stop, which wastes work efficiency and easily affects the life of the motor. Therefore, the connecting handle 23 is used to control the slight descent of the button mold. Since the connecting handle can maintain synchronous movement with the lifting column through the movement of the fixed wheel 232 along the spiral groove 212, it is only necessary to use the die cylinder 25 to drive the transmission arm 235 to move downward, and use the bar hole of the limit frame 221 to limit the limiting wheel 233 on the connecting handle 23 to ensure that the connecting handle keeps moving downward in a straight line, thereby achieving the effect of avoiding feeding. Similarly, after the die cylinder retracts, the connecting handle drives the button mold to rise again to the stamping position under the action of the tension spring 24.

[0040] The beneficial effects of the present invention are: through a reasonable and ingenious structural configuration, the accuracy of the lower die lifting height is ensured to ensure the consistency of the stamping pressure while reducing the production cost of the device, and the overall degree of automation, accuracy and ease of operation are higher.

[0041] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify and modify the above embodiments within the scope of the present invention.

Claims

1. A lower die lifting device for a button-fastening machine, characterized in that: The invention comprises a fixed plate (1) and a lifting assembly and a driving mechanism (3) respectively mounted on the upper and lower sides of the fixed plate, wherein the lifting assembly comprises a lifting mechanism (2) and a button mold (4) mounted on the lifting mechanism, wherein the lifting mechanism (2) comprises a cylindrical cam platform (21) connected to the driving mechanism and a limiting seat (22) fixedly connected to the fixed plate, wherein the cam platform can rotate around its own axis under the action of the driving mechanism, wherein the top surface of the cam platform is in a spiral shape that smoothly transitions from bottom to top along the side wall of the cam platform, wherein the limiting seat comprises a limiting sleeve (222) fixed above the cam platform, wherein a lifting column (41) is fixedly connected below the button mold, wherein a through hole parallel to the axial direction of the cam platform and having a diameter matching that of the lifting column is provided at the center of the limiting sleeve, wherein the lifting column extends through the through hole toward the cam platform, and the bottom end of the lifting column is placed on the top surface of the cam platform.

2. The lower die lifting device of the button-fastening machine according to claim 1, characterized in that: The end of the top surface of the cam platform (21) is provided with a plurality of cam steps (211) along the spiral direction of the top surface of the cam platform, and the cam steps are smoothly transitioned with circular arc chamfers.

3. The lower die lifting device of the button-fastening machine according to claim 1, characterized in that: The lifting mechanism (2) further comprises a connecting handle (23) arranged parallel to the lifting column and located outside the cam platform, the top end of the connecting handle being fixedly connected to the bottom end of the lifting column, a spiral groove (212) parallel to the top surface of the cam platform is provided on the outer wall of the cam platform, and a fixed wheel (232) is rotatably fixed on a side of the connecting handle close to the cam platform, the fixed wheel being located in the spiral groove and having a diameter smaller than the width of the spiral groove.

4. The lower die lifting device of the button-fastening machine according to claim 3, characterized in that: The limit seat (22) further comprises a strip plate-shaped limit frame (221) arranged parallel to the lifting column and the connecting handle, the limit frame is located on the side of the cam platform, and the top end of the limit frame is connected and fixed to the limit sleeve (222), the bottom end of the limit frame is connected and fixed to the fixed plate (1), the connecting handle is located between the cam platform and the limit frame, the limit frame is provided with a strip hole parallel to the height direction of the cam platform, and a limit wheel (233) is rotatably fixedly installed on one side of the connecting handle close to the limit frame, the limit wheel is located in the strip hole and the diameter of the limit wheel is adapted to the strip hole.

5. The lower die lifting device of the button-fastening machine according to claim 4, characterized in that: The connecting handle (23) includes a strip-shaped handle body (231) parallel to the limiting frame in the height direction, the fixed wheel (232) and the limiting wheel (233) are respectively mounted on two opposite planes of the handle body, and a transmission arm (235) is integrally connected to one side of the handle body, and the transmission arm extends outward along the width direction of the handle body to form a transmission surface, and a die-pressing cylinder (25) is also fixedly mounted on the bottom side of the limiting sleeve (222), and the telescopic end of the die-pressing cylinder points to the transmission surface of the transmission arm.

6. The lower die lifting device of the button-fastening machine according to claim 5, characterized in that: A first fixing pin (2221) is fixedly provided on the limiting sleeve (222), a second fixing pin (2331) is fixedly provided on the connecting handle (23), and a tension spring (24) is connected between the first fixing pin and the second fixing pin.

7. The lower die lifting device of the button-fastening machine according to claim 6, characterized in that: The first fixing pin (2221) and the second fixing pin (2331) are both provided with an engaging groove, and the two ends of the tension spring are respectively engaged in the engaging grooves of the first fixing pin and the second fixing pin. The second fixing pin is located at the center of the connecting handle, and the limiting wheel (233) is rotatably sleeved on the outside of the second fixing pin.

8. The lower die lifting device of the button-fastening machine according to claim 4, characterized in that: A fixing groove (411) is provided at the bottom end of the lifting column (41), and the top of the connecting handle (23) is fastened in the fixing groove by at least two fixing bolts. A limiting column (234) is fixedly connected to a side surface of the bottom end of the connecting handle close to the limiting frame (221), and the limiting column is located in the strip hole of the limiting frame and the diameter of the limiting column is smaller than the width of the strip hole.

9. The lower die lifting device of the button-fastening machine according to claim 4, characterized in that: The fixing plate (1) is further provided with a mounting seat (11), the bottom end of the limiting frame (221) is connected and fixed to the mounting seat, the cam platform (21) is fixed on the mounting seat, and the center of the bottom of the cam platform is fixedly connected to a transmission shaft that penetrates the mounting seat fixing plate, and the transmission shaft is connected to a driving mechanism to drive the cam platform to rotate.

10. The lower die lifting device of the button-fastening machine according to claim 9, characterized in that: The driving mechanism (3) is specifically a driving motor, wherein a driving shaft of the driving motor and a transmission shaft of the cam table are driven by a synchronous belt (31), and a plurality of fixed blocks (32) are fixedly mounted on the driving motor, wherein the fixed blocks are located on the circumference of the synchronous belt and one end of the fixed blocks away from the driving motor is connected and fixed to the fixed plate.

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