Servo pressing machine

Abstract

The utility model provides a servo press-fitting machine which comprises a press-fitting machine body provided with a press-fitting platform. A transmission mechanism is arranged on the press-fitting machine and is provided with a first input end, a second input end and an output end, and the output end is connected with a press-fitting head; the transmission mechanism can be used for converting rotary motion of the first input end and the second input end into linear motion of the output end, so that the press-fitting head is used for press-fitting a workpiece; a first driving mechanism and a second driving mechanism are further arranged, the driving end of the first driving mechanism is connected with the first input end, and the driving end of the second driving mechanism is connected with the second input end; the first driving mechanism and the second driving mechanism are arranged to drive the first input end and the second input end correspondingly, the rotating speed of one driving mechanism is set to be higher than that of the other driving mechanism, the high-rotating-speed driving mechanism is used for driving when the press-fitting head is pressed downwards to be close to a workpiece, and the machining efficiency can be improved; and during press fitting, a low-rotating-speed driving mechanism is used for driving, so that the control on press-in displacement can be ensured, and an efficient and accurate press fitting procedure is further realized.

Description

Technical Field

[0001] This application relates to the technical field of press-fitting machines, and particularly to a servo press-fitting machine. Background Art

[0002] In modern industrial production, the requirements for the precision of assembly are getting higher and higher. Existing press-fitting machines usually adopt the transmission mode of screw and nut. A servo motor is used to drive the screw to rotate, and the thread fit between the screw and the nut is utilized to achieve precise control of the press-fitting displacement of the press-fitting machine. However, due to the transmission mode of thread fit, the rotation speed of the screw often determines the moving speed of the nut, and its acceleration and speed are limited by the load inertia. The press-fitting head usually performs press-fitting at a fixed speed, making it difficult to meet the requirements of modern high-speed machining. Summary of the Utility Model

[0003] The purpose of this application is to address the above problems by providing a servo press-fitting machine, including:

[0004] A press machine body, the bottom of the press machine body has a press-fitting platform;

[0005] A transmission mechanism, the transmission mechanism is arranged on the press machine body, having a first input end, a second input end and an output end, and the output end is connected with a press-fitting head; the transmission mechanism can respectively convert the rotational motion of the first input end and the second input end into the linear motion of the output end, so that the press-fitting head presses the workpiece on the press-fitting platform;

[0006] A first driving mechanism, the first driving mechanism is arranged on the press machine body, and its driving end is connected with the first input end, and is used to drive the first input end to rotate;

[0007] A second driving mechanism, the second driving mechanism is arranged on the transmission mechanism, and its driving end is connected with the second input end, and is used to drive the second input end to rotate.

[0008] According to the technical solution provided by some embodiments of this application, the transmission mechanism includes a rotating component and a sliding component. The rotating component includes a lead screw, and the lead screw is the first input end. The lead screw is arranged on the press machine body in the vertical direction and is rotatably connected with the press machine body. A braking component is arranged at the bottom end of the lead screw, and the braking component can lock the lead screw; a nut is in threaded fit with the lead screw, and the nut is the second input end. A housing is sleeved outside the nut, and the housing is rotatably connected with the nut and is connected with the sliding component. The sliding component has the output end and can slide in the vertical direction on the press machine body.

[0009] According to the technical solutions provided by certain embodiments of the present application, slide rails are symmetrically arranged on both sides of the press body along the first horizontal direction, and the two slide rails extend along the vertical direction; the sliding assembly includes a mounting plate, which is the output end, and the mounting plate is fixedly connected to the housing. Both ends of the mounting plate along the first horizontal direction are respectively connected with sliders, and the two sliders are respectively embedded in the corresponding slide rails and slidably connected to the slide rails. The bottom of the mounting plate is connected to the pressing head.

[0010] According to the technical solutions provided by certain embodiments of the present application, the braking assembly includes a turntable and a brake caliper. The turntable is sleeved on the bottom end of the lead screw, and the brake caliper is arranged on the press body. The brake caliper can clamp the turntable to lock the lead screw.

[0011] According to the technical solutions provided by certain embodiments of the present application, a limiting device is arranged on the slide rail, and the limiting device is used to limit the sliding of the mounting plate along the vertical direction.

[0012] According to the technical solutions provided by certain embodiments of the present application, the first driving mechanism includes a first driving motor. The first driving motor is arranged on the top of the press body, and its driving shaft extends along the vertical direction and is coaxially connected to the lead screw through a connecting member.

[0013] According to the technical solutions provided by certain embodiments of the present application, the second driving mechanism includes a second driving motor. The second driving motor is arranged on the housing, and its driving shaft extends along the vertical direction and is sleeved with a driving gear. A transmission gear is rotatably connected to the outer circumference of the lead screw, and the transmission gear is fixedly connected to the nut. A transmission belt is sleeved on the outer circumferences of the driving gear and the transmission gear together.

[0014] According to the technical solutions provided by certain embodiments of the present application, the press body includes a base and a press frame. The pressing platform is arranged on the base, and the transmission mechanism and the first driving mechanism are arranged on the press frame.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows: The present application provides a servo press-fitting machine, including a press body, and a press-fitting platform is provided at the bottom of the press body; a transmission mechanism is provided on the press body, which has a first input end, a second input end and an output end, and a press-fitting head is connected to the output end; the transmission mechanism can respectively convert the rotational motion of the first input end and the second input end into a linear motion of the output end, so that the press-fitting head presses the workpiece on the press-fitting platform; a first driving mechanism and a second driving mechanism are also provided, the driving end of the first driving mechanism is connected to the first input end, and the driving end of the second driving mechanism is connected to the second input end; by setting the first driving mechanism and the second driving mechanism to drive the first input end and the second input end respectively, the first input end and the second input end can be independently controlled, and the rotational speed of one of the driving mechanisms is set to be higher than that of the other driving mechanism. When the press-fitting head presses down close to the workpiece to be press-fitted, the driving mechanism with a high rotational speed is used to drive, which can improve the processing efficiency; when press-fitting, the driving mechanism with a low rotational speed is used to drive, which can ensure the control of the press-in displacement. By switching the use of the first driving mechanism and the second driving mechanism, an efficient and precise press-fitting process can be achieved simultaneously.

[0016] It should be understood that the description of technical features, technical solutions, beneficial effects or similar languages in the present application does not imply that all features and advantages can be achieved in any single embodiment. On the contrary, it can be understood that the description of features or beneficial effects means that at least one embodiment includes specific technical features, technical solutions or beneficial effects. Therefore, the description of technical features, technical solutions or beneficial effects in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and beneficial effects described in this embodiment can be combined in any appropriate manner. Those skilled in the art will understand that an embodiment can be implemented without one or more specific technical features, technical solutions or beneficial effects of a specific embodiment. In other embodiments, additional technical features and beneficial effects can also be identified in specific embodiments that do not embody all embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 It is the front view of a servo press-fitting machine provided by an embodiment of the present application;

[0019] Figure 2 It is the internal structure schematic diagram of a servo press-fitting machine provided by an embodiment of the present application;

[0020] Figure 3 A side cross-sectional view of a servo press provided by an embodiment of the present application;

[0021] Figure 4 A schematic structural diagram of a braking assembly of a servo press provided by an embodiment of the present application.

[0022] The text annotations in the figure are indicated as:

[0023] 1. Press body; 2. Transmission mechanism; 3. First driving mechanism; 4. Second driving mechanism; 5. Pressing head; 11. Base; 12. Press frame; 13. Pressing platform; 14. Slide rail; 15. Stopper; 21. Rotating assembly; 22. Sliding assembly; 23. Braking assembly; 31. First driving motor; 32. Coupling; 41. Second driving motor; 42. Driving gear; 43. Transmission gear; 44. Transmission belt; 211. Lead screw; 212. Nut; 213. Housing; 221. Mounting plate; 222. Slide block; 231. Turntable; 232. Brake caliper. Detailed implementation manners

[0024] In order to enable those skilled in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. The descriptions in this part are only exemplary and explanatory, and should not have any restrictive effect on the protection scope of the present application. Specifically, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0026] As mentioned in the background art, in view of the problems in the prior art, the present embodiment provides a servo press, including:

[0027] A press body 1, and a pressing platform 13 is provided at the bottom of the press body 1;

[0028] The transmission mechanism 2 is provided on the press body 1 and has a first input end, a second input end, and an output end. A pressing head 5 is connected to the output end. The transmission mechanism 2 can respectively convert the rotational motion of the first input end and the second input end into the linear motion of the output end, so that the pressing head 5 presses the workpiece on the pressing platform 13.

[0029] The first driving mechanism 3 is provided on the press body 1, and its driving end is connected to the first input end for driving the first input end to rotate.

[0030] The second driving mechanism 4 is provided on the transmission mechanism 2, and its driving end is connected to the second input end for driving the second input end to rotate.

[0031] As Figure 1 shown, the first horizontal direction is Figure 3 the direction perpendicular to the paper surface in the figure. The press body 1 includes a base 11 and a press frame 12. The base 11 is approximately a cuboid structure, and a pressing platform 13 is provided on the base 11. The press frame 12 includes a fixed shell and a connecting frame. The fixed shell is a cuboid shell with a first open end. The connecting frame is used to connect the fixed shell and the base 11. The transmission mechanism 2 is provided on the fixed shell. The first input end of the transmission mechanism 2 is connected to the driving end of the first driving mechanism 3, the second input end is connected to the driving end of the second driving mechanism 4, and the output end is connected to the pressing head 5. The first driving mechanism 3 can drive the first input end to rotate, so that the output end drives the pressing head 5 to perform a linear motion to press the workpiece on the pressing platform 13. The second driving mechanism 4 can drive the second input end to rotate, so that the output end drives the pressing head 5 to perform a linear motion to press the workpiece on the pressing platform 13.

[0032] By setting the first driving mechanism 3 and the second driving mechanism 4 to drive the first input end and the second input end respectively, the first input end and the second input end can be independently controlled. Set the rotational speed of one driving mechanism to be higher than that of the other driving mechanism. When the pressing head 5 presses down and approaches the workpiece to be pressed, use the driving mechanism with a high rotational speed to drive, which can improve the processing efficiency. When pressing, use the driving mechanism with a low rotational speed to drive, which can ensure the control of the pressing displacement. By switching the use of the first driving mechanism 3 and the second driving mechanism 4, an efficient and precise pressing process can be achieved simultaneously.

[0033] In a preferred embodiment, the transmission mechanism 2 includes a rotating assembly 21 and a sliding assembly 22. The rotating assembly 21 includes a lead screw 211, which is the first input end. The lead screw 211 is arranged vertically on the press body 1 and is rotatably connected to the press body 1. A braking assembly 23 is provided at the bottom end of the lead screw 211, and the braking assembly 23 can lock the lead screw 211. A nut 212 is in threaded engagement with the lead screw 211, and the nut 212 is the second input end. A housing 213 is sleeved outside the nut 212. The housing 213 is rotatably connected to the nut 212 and is connected to the sliding assembly 22. The sliding assembly 22 has an output end and can slide vertically on the press body 1.

[0034] As Figure 2 and 3 As shown, the lead screw 211 is arranged vertically on the fixed housing, and its top end and bottom end are respectively rotatably connected to the top and bottom of the fixed housing. A nut 212 is in threaded engagement with the lead screw 211. When the first driving mechanism 3 drives the lead screw 211 to rotate, due to the interaction between the threads of the lead screw 211 and the nut 212, the nut 212 rotates and moves vertically at the same time. A deep groove ball bearing is provided between the nut 212 and the housing 213, and it can rotate in the housing 213. The housing 213 is fixed to the sliding assembly 22 and is limited by the sliding assembly 22 to only move vertically. Then, the sliding assembly 22 is driven by the housing 213 to slide vertically, so that the pressing head 5 presses the workpiece; when the second driving mechanism 4 drives the nut 212 to rotate, the braking assembly 23 can lock the lead screw 211 to prevent the lead screw 211 from rotating. Due to the interaction between the threads, the nut 212 also rotates in the housing 213 and drives the sliding assembly 22 to slide vertically through the housing 213, so that the pressing head 5 presses the workpiece.

[0035] In a preferred embodiment, slide rails 14 are symmetrically arranged on both sides of the press body 1 along the first horizontal direction, and the two slide rails 14 extend vertically; the sliding assembly 22 includes a mounting plate 221, and the mounting plate 221 is the output end. The mounting plate 221 is fixedly connected to the housing 213. The two ends of the mounting plate 221 along the first horizontal direction are respectively connected with sliders 222, and the two sliders 222 are respectively embedded in the corresponding slide rails 14 and are slidably connected to the slide rails 14. The bottom of the mounting plate 221 is connected to the pressing head 5.

[0036] As Figure 1 and Figure 2As shown, on both sides of the first open end of the fixed housing along the first horizontal direction, slide rails 14 are symmetrically arranged. The slide rails 14 extend in the vertical direction. The mounting plate 221 is a rectangular flat plate and is fixed to the housing 213. At both ends of the mounting plate 221 along the first horizontal direction, sliders 222 are respectively connected. A pressing head 5 is connected to its bottom. In this embodiment, two sliders 222 are connected to each end of the mounting plate 221. The sliders 222 can be slidably engaged with the slide rails 14 so that the mounting plate 221 can slide vertically on the fixed housing to drive the pressing head 5 to perform pressing.

[0037] In a preferred embodiment, the braking assembly 23 includes a turntable 231 and a brake caliper 232. The turntable 231 is sleeved on the bottom end of the lead screw 211. The brake caliper 232 is arranged on the press body 1. The brake caliper 232 can clamp the turntable 231 to lock the lead screw 211.

[0038] As Figure 3 and Figure 4 shown, the turntable 231 and the brake caliper 232 adopt a brake disc and a brake caliper in the prior art. The turntable 231 is sleeved on the bottom end of the lead screw 211. The brake caliper 232 is arranged in the fixed housing. When the second driving mechanism 4 drives the nut 212 to rotate, the brake caliper 232 clamps the turntable 231, thereby locking the lead screw 211 to prevent the lead screw 211 from rotating; when the first driving mechanism 3 drives the lead screw 211 to rotate, the brake caliper 232 releases the restriction on the turntable 231, so that the lead screw 211 can rotate freely.

[0039] In a preferred embodiment, a limiting device is arranged on the slide rail 14. The limiting device is used to limit the vertical sliding of the mounting plate 221.

[0040] As Figure 2 shown, the limiting device adopts stoppers 15. Four stoppers 15 are respectively arranged at the upper and lower ends of the two slide rails 14 to limit the upper and lower positions of the mounting plate 221 sliding along the slide rails.

[0041] In a preferred embodiment, the first driving mechanism 3 includes a first driving motor 31. The first driving motor 31 is arranged on the top of the press body 1. Its driving shaft extends in the vertical direction and is coaxially connected to the lead screw 211 through a connecting member.

[0042] As Figure 2 shown, the first driving motor 31 adopts a servo motor in the prior art. At the same time, a speed reducer is provided to increase the torque output. The first driving motor 31 and the speed reducer are arranged on the top of the fixed housing. Its driving shaft penetrates through the top of the fixed housing in the vertical direction and extends into the fixed housing, and is coaxially connected to the lead screw 211 through a coupling 32.

[0043] In a preferred embodiment, the second driving mechanism 4 includes a second driving motor 41. The second driving motor 41 is disposed on the housing 213. Its driving shaft extends in the vertical direction and is sleeved with a driving gear 42. The outer circumference of the lead screw 211 is rotatably connected with a transmission gear 43. The transmission gear 43 is fixedly connected with the nut 212. A transmission belt 44 is sleeved on the outer circumferences of the driving gear 42 and the transmission gear 43.

[0044] As Figure 2 shown, the second driving motor 41 adopts a servo motor in the prior art and is also provided with a speed reducer to increase the torque output. The second driving motor 41 and the speed reducer are fixedly arranged on the housing 213 together. Its driving shaft extends in the vertical direction and is sleeved with a driving gear 42. The outer circumference of the lead screw 211 is rotatably connected with a transmission gear 43. The transmission gear 43 is fixedly connected to the top of the nut 212. A transmission belt 44 is sleeved on the outer circumferences of the driving gear 42 and the transmission gear 43. The second driving motor 41 drives the driving gear 42 to rotate, drives the transmission gear 43 through the transmission belt 44, and then makes the nut 212 rotate. At the same time, when the nut 212 moves in the vertical direction, the second driving mechanism 4 fixed on the housing 213 can move synchronously with the nut 212.

[0045] In this embodiment, a pressure sensor is arranged on the press head 5 to detect the pressure received by the workpiece during pressing. An opposed photoelectric switch is arranged on the fixed housing to detect the position of the mounting plate 221 relative to the fixed housing. A microswitch is arranged at the stop block 15 and can be triggered when the mounting plate 221 contacts the stop block 14. A PLC controller is also provided, which is electrically connected to the pressure sensor, the opposed photoelectric switch and the microswitch respectively, and is respectively control-connected to the first driving motor 31 and the second driving motor 41. Therefore, precise control during the pressing process can be realized. At the same time, through the corresponding control system, the first driving motor 31 and the second driving motor 41 can be synchronously controlled, so that the lead screw 211 and the nut 212 can cooperate coordinately to realize synchronous rotation.

[0046] Working principle: First, set the first driving motor 31 to high speed and the second driving motor 41 to low speed. During press-fitting, first start the first driving motor 31. The first driving motor 31 drives the lead screw 211 to rotate through the coupling 32. Through the interaction between the external thread of the lead screw 211 and the internal thread of the nut 212, while the nut 212 rotates, it descends along the lead screw 211. Then, it drives the mounting plate 221 through the housing 213, so that the mounting plate 221 slides along the guide rail 14, and the press-fitting head 5 moves downward to approach the workpiece on the press-fitting platform 13; when the press-fitting head 5 approaches the workpiece and is about to start press-fitting, turn off the first driving motor 31 and at the same time, the brake caliper 232 clamps the turntable 231 to lock the lead screw 211, and start the second driving motor 41. The second driving motor 41 drives the driving gear 42 to rotate, drives the driven gear 43 through the transmission belt 44, and makes the nut 212 rotate. Since the lead screw 211 is fixed, the nut 212 is subjected to the force between its thread and the lead screw 211, rotates and descends along the lead screw 211 at the same time, and drives the mounting plate 221 to continue sliding along the guide rail 14, so that the press-fitting head 5 presses the workpiece.

[0047] In this article, specific examples are used to elaborate on the principle and implementation manner of this application. The description of the above embodiments is only used to help understand the method and its core idea of this application. The above is only the preferred implementation manner of this application. It should be noted that due to the limited nature of written expression and objectively infinite specific structures, for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements, refinements or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, shall all be regarded as the protection scope of this application.

Claims

1. A servo press machine, characterized in that: include: A press body (1), wherein the bottom of the press body (1) is provided with a press-fitting platform (13); a transmission mechanism (2), the transmission mechanism (2) being arranged on the press body (1), and having a first input end, a second input end and an output end, the output end being connected to a press head (5); the transmission mechanism (2) can respectively convert the rotational motion of the first input end and the second input end into the linear motion of the output end, so that the press head (5) can press the workpiece on the press platform (13); A first driving mechanism (3), the first driving mechanism (3) being arranged on the press body (1), and having a driving end connected to the first input end, and being used for driving the first input end to rotate; A second driving mechanism (4), wherein the second driving mechanism (4) is arranged on the transmission mechanism (2), and a driving end thereof is connected to the second input end, and is used for driving the second input end to rotate.

2. A servo press machine according to claim 1, characterized in that: The transmission mechanism (2) comprises a rotating assembly (21) and a sliding assembly (22). The rotating assembly (21) comprises a lead screw (211), the lead screw (211) being the first input end. The lead screw (211) is arranged on the press body (1) along the vertical direction and is rotatably connected to the press body (1). A brake assembly (23) is arranged at the bottom end of the lead screw (211), and the brake assembly (23) can lock the lead screw (211). A nut (212) is threadedly engaged on the lead screw (211), and the nut (212) is the second input end. A cover shell (213) is sleeved on the outside of the nut (212), and the cover shell (213) is rotatably connected to the nut (212) and is connected to the sliding assembly (22). The sliding assembly (22) has the output end and can slide on the press body (1) along the vertical direction.

3. A servo press machine according to claim 2, characterized in that: The press body (1) is symmetrically provided with slide rails (14) on both sides along the first horizontal direction, and the two slide rails (14) extend in the vertical direction; the sliding assembly (22) includes a mounting plate (221), and the mounting plate (221) is the output end. The mounting plate (221) is fixedly connected to the cover shell (213), and the mounting plate (221) is respectively connected to sliders (222) at both ends along the first horizontal direction. The two sliders (222) are respectively embedded in the corresponding slide rails (14) and are slidably connected to the slide rails (14), and the bottom of the mounting plate (221) is connected to the press head (5).

4. A servo press machine according to claim 2, characterized in that: The brake assembly (23) comprises a rotating disk (231) and a brake caliper (232); the rotating disk (231) is sleeved on the bottom end of the lead screw (211); the brake caliper (232) is arranged on the press body (1); and the brake caliper (232) can clamp the rotating disk (231) to lock the lead screw (211).

5. The servo press machine according to claim 3, characterized in that: The slide rail (14) is provided with a limiting device, and the limiting device is used to limit the sliding of the mounting plate (221) in the vertical direction.

6. The servo press machine according to claim 2, characterized in that: The first driving mechanism (3) comprises a first driving motor (31), which is arranged on the top of the press body (1), and its driving shaft extends in a vertical direction and is coaxially connected to the lead screw (211) through a connecting member.

7. The servo press machine according to claim 2, characterized in that: The second driving mechanism (4) comprises a second driving motor (41), which is arranged on the housing (213), and a driving shaft of which extends in a vertical direction and is sleeved with a driving gear (42), the outer periphery of the lead screw (211) is rotatably connected with a transmission gear (43), the transmission gear (43) is fixedly connected to the nut (212), and a transmission belt (44) is sleeved on the outer peripheries of the driving gear (42) and the transmission gear (43).

8. The servo press machine according to claim 1, characterized in that: The press body (1) comprises a base (11) and a press frame (12); the base (11) is provided with the press-fitting platform (13); the press frame (12) is provided with the transmission mechanism (2) and the first drive mechanism (3).

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