Adjustable stroke precision cross arm down press

Abstract

The utility model discloses a precision cross arm down -pressing device of adjustable stroke including frame body, lift platform and install on the motor of frame body, synchronous belt drive mechanism, screw drive mechanism and cross joint arm assembly, synchronous belt drive mechanism installs the output of motor, screw drive mechanism installs the output of synchronous belt drive mechanism, cross joint arm assembly installs the output of screw drive mechanism, lift platform with cross joint arm assembly is connected, synchronous belt drive mechanism drives and links to each other under the drive of motor and drives screw drive mechanism transmission, cross joint arm assembly moves under the transmission of screw drive mechanism, and the lift of lift platform is driven by the movement of cross joint arm assembly.

Description

Technical Field

[0001] This utility model relates to the technical field of precision mechanical control, and in particular to a precision crossarm pressing device with adjustable stroke. Background Technology

[0002] In industrial equipment such as semiconductor packaging equipment and precision stamping machines, a four-bar rigid mechanism is often used, with the stroke range (±0.5mm) fixed by physical limit blocks. The drive system uses a combination of stepper motor and gear reducer, and the position feedback relies on mechanical contact switches. However, in actual applications, it has been found that its accuracy is low and cannot meet the current production needs.

[0003] To solve the above problems, it is necessary to provide a precision crossarm pressing device with adjustable stroke. Utility Model Content

[0004] The purpose of this invention is to provide a precision crossarm pressing device with adjustable stroke that integrates a motor, a lead screw transmission mechanism, and a crossarm linkage structure to achieve sub-millimeter stroke adjustment accuracy.

[0005] To achieve the above objectives, the adjustable stroke precision crossarm pressing device provided by this utility model includes a frame, a lifting platform, and a motor, a synchronous belt drive mechanism, a lead screw drive mechanism, and a crossarm assembly mounted on the frame. The synchronous belt drive mechanism is mounted at the output end of the motor, the lead screw drive mechanism is mounted at the output end of the synchronous belt drive mechanism, and the crossarm assembly is mounted at the output end of the lead screw drive mechanism. The lifting platform is connected to the crossarm assembly. The synchronous belt drive mechanism drives the motor and drives the lead screw drive mechanism. The crossarm assembly moves under the drive of the lead screw drive mechanism, and the movement of the crossarm assembly drives the lifting platform to rise and fall.

[0006] Preferably, the lead screw drive mechanism, the cross joint arm assembly, and the lifting platform are provided in two sets. The two sets of lead screw drive mechanisms and the two sets of cross joint arm assemblies are located on both sides of the synchronous belt drive mechanism, and the synchronous belt drive mechanism synchronously drives the transmission of the two sets of lead screw drive mechanisms and the movement of the cross joint arm assemblies.

[0007] Specifically, the synchronous belt drive mechanism includes a driving pulley, a driven pulley, and a synchronous belt. The output end of the motor has a transmission pulley. A driving pulley is provided on both sides of the transmission pulley. Each of the lead screw drive mechanisms on both sides is connected to a driven pulley. The synchronous belt is wound between the transmission pulley, the driving pulley, and the driven pulley. The transmission of the transmission pulley, the driving pulley, and the driven pulley enables the lead screw drive mechanisms on both sides to drive synchronously under the drive of the motor.

[0008] Preferably, the cross-arm assembly includes a bottom fixing member, a first link, a second link, a lifting member, a third link, and a fourth link. The bottom fixing member is mounted on the frame. The first end of the first link is pivotally connected to one side of the bottom fixing member. The second end of the first link is pivotally connected to the first end of the second link. The second end of the second link is pivotally connected to the first end of the lifting member. The second end of the lifting member is pivotally connected to the first end of the third link. The second end of the third link is pivotally connected to the first end of the fourth link. The second end of the fourth link is pivotally connected to the other side of the bottom fixing member. The pivot point of the third and fourth links is connected to the output end of the lead screw drive mechanism. The lifting member is connected to the lifting platform.

[0009] Preferably, the lead screw drive mechanism includes a lead screw and a lead screw nut. The lead screw is connected to the output end of the synchronous belt drive mechanism. The lead screw and the lead screw nut cooperate with each other. The lead screw nut is connected to the cross joint arm assembly. The lead screw rotates under the drive of the synchronous belt drive mechanism and drives the lead screw nut to move. The movement of the lead screw nut on the lead screw drives the cross joint arm assembly to move.

[0010] Preferably, the adjustable stroke precision crossarm pressing device further includes a guide assembly, which is provided between the frame and the lifting platform. The guide assembly includes a guide sleeve and a guide rod. The guide sleeve is installed on the frame, one end of the guide rod is connected to the lifting platform, and the other end of the guide rod is slidably disposed on the guide sleeve.

[0011] Specifically, the guide components are located at the four corners of the lifting platform.

[0012] Preferably, the motor is a servo motor.

[0013] Specifically, the diameter of the drive wheel is 39.8 mm, the tooth pitch of the drive wheel is 5 mm, and the number of teeth of the drive wheel is 25. The diameter of the driven wheel is 79.6 mm, and the number of teeth of the driven wheel is 50.

[0014] Preferably, the lead screw transmission mechanism is a double ball screw mechanism with a lead of 5 mm and an accuracy of C3 grade.

[0015] Compared with existing technologies, the adjustable stroke precision cross arm pressing device of this utility model combines multiple mechanisms such as a motor, a synchronous belt drive mechanism, a lead screw drive mechanism, and a cross articulated arm assembly. The motor drives the synchronous belt drive mechanism, which in turn drives the lead screw drive mechanism to move the cross articulated arm assembly, thereby achieving the precise pressing motion of the lifting platform. The speed reduction achieved by the synchronous belt drive mechanism replaces the traditional multi-stage gearbox. Combined with a real-time closed-loop compensation algorithm, the dynamic positioning accuracy is improved from ±0.15mm in the existing technology to ±0.03mm (a 5-fold improvement), which greatly improves its transmission accuracy and achieves sub-millimeter level stroke precision adjustment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the adjustable stroke precision cross arm pressing device of this utility model.

[0017] Figure 2 This is a three-dimensional structural diagram of the adjustable stroke precision cross arm pressing device of this utility model from another angle.

[0018] Figure 3 This is a front view of the adjustable stroke precision cross arm pressing device of this utility model, with the cross joint arm assembly in the retracted state.

[0019] Figure 4 This is a front view of the adjustable stroke precision cross arm pressing device of this utility model, with the cross joint arm assembly in the extended state.

[0020] Figure 5 This is a schematic diagram of the internal structure of the adjustable stroke precision cross arm pressing device of this utility model.

[0021] Figure 6 This is a schematic diagram of the internal structure of the adjustable stroke precision cross arm pressing device of this utility model from another angle. Detailed Implementation

[0022] To explain in detail the technical content, structural features, and effects achieved by this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0023] Please see Figures 1 to 6The adjustable stroke precision crossarm pressing device 100 of this utility model includes a frame 1, a lifting platform 2, a motor 3, a synchronous belt drive mechanism 4, a lead screw drive mechanism 5, and a cross articulated arm assembly 6. The motor 3, the synchronous belt drive mechanism 4, the lead screw drive mechanism 5, and the cross articulated arm assembly 6 are all mounted on the frame 1. The synchronous belt drive mechanism 4 is mounted on the output end of the motor 3, the lead screw drive mechanism 5 is mounted on the output end of the synchronous belt drive mechanism 4, and the cross articulated arm assembly 6 is mounted on the output end of the lead screw drive mechanism 5. The lifting platform 2 is connected to the cross articulated arm assembly 6. The synchronous belt drive mechanism 4 is driven by the motor 3 and drives the lead screw drive mechanism 5. The cross articulated arm assembly 6 moves under the drive of the lead screw drive mechanism 5, and the movement of the cross articulated arm assembly 6 drives the lifting platform 2 to rise and fall. The synchronous belt drive mechanism 4, driven by motor 3, drives the lead screw drive mechanism 5, which in turn drives the cross joint arm assembly 6, thereby achieving the precise downward movement of the lifting platform 2. The speed reduction achieved by the synchronous belt drive mechanism 4 replaces the traditional multi-stage gearbox. Combined with a real-time closed-loop compensation algorithm, the dynamic positioning accuracy is improved from ±0.15mm in the existing technology to ±0.03mm (a 5-fold improvement), significantly enhancing its transmission accuracy and achieving sub-millimeter level stroke precision adjustment. More specifically, as follows: Please see Figures 5 to 6The lifting platform 2 is provided with two sets of screw drive mechanisms 5, cross articulated arm assemblies 6, and lifting platform 2. The two sets of screw drive mechanisms 5 and the two sets of cross articulated arm assemblies 6 are located on both sides of the synchronous belt drive mechanism 4. The synchronous belt drive mechanism 4 synchronously drives the transmission of the two sets of linkage drive mechanisms and the movement of the cross articulated arm assemblies 6. Specifically, the lifting platform 2 is a plate with a rectangular cross-section. The motor 3 is located in the middle of the front side of the lifting platform 2. The synchronous belt drive mechanism 4 extends from the motor 3 to both sides and connects to the screw drive mechanisms 5 on both sides. The cross articulated arm assemblies 6 correspond one-to-one with the screw drive mechanisms 5. That is, one set of screw drive mechanisms 5 is perpendicular to the synchronous belt drive mechanism 4, and the other set of screw drive mechanisms 5 is perpendicular to the synchronous belt drive mechanism 4. This forms a layout in which the cross articulated arm assemblies 6, screw drive mechanisms 5, and cross articulated arm assemblies 6 are arranged around the lifting platform 2, thereby creating a large accommodating space in the middle to meet actual usage needs. Specifically, the synchronous belt drive mechanism 4 includes a driving pulley 41, a driven pulley 42, and a synchronous belt 43. The output end of the motor 3 has a transmission pulley 31, with a driving pulley 41 on each side of the transmission pulley 31. Each of the two sides of the screw drive mechanism 5 is connected to a driven pulley 42. The synchronous belt 43 is wound around the transmission pulley 31, the driving pulley 41, and the driven pulley 42. Through the transmission of the transmission pulley 31, the driving pulley 41, and the driven pulley 42, the two sides of the screw drive mechanism 5 are synchronously driven by the motor 3. In this embodiment, the motor 3 is a servo motor 3. The servo motor 3 (0.01° accuracy) drives the driving pulley 41 (Φ39.8mm, 25 teeth), which in turn drives the driven pulley 42 (Φ79.6mm, 50 teeth, speed ratio 1:2). That is, the smaller synchronous pulley drives the larger synchronous pulley, which, through the two sides of the screw drive mechanism 5 (in this embodiment, a double ball screw (5mm lead) links two sections of the cross-arm assembly 6), achieving precise downward movement of the cross arm. A servo motor 3 directly drives a synchronous belt transmission mechanism 4 (speed ratio 1:2). Through single-stage reduction to eliminate accumulated gearbox errors, the transmission error of the synchronous belt 43 is verified to be < ±0.03mm. The precise meshing of the small synchronous pulley (Φ39.8mm, 25 teeth) with the large synchronous pulley (Φ79.6mm, 50 teeth) improves the transmission efficiency to 98% (compared to 82% efficiency of a gear reducer). The 180° mirror distribution of the double lead screw transmission mechanism 5 allows for the vector superposition and cancellation of thermal deformation torques.

[0024] Please see Figures 5 to 6The cross-arm assembly 6 includes a bottom fixing member 61, a first connecting rod 62, a second connecting rod 63, a lifting member 64, a third connecting rod 65, and a fourth connecting rod 66. The bottom fixing member 61 is mounted on the frame 1. The first end of the first connecting rod 62 is pivotally connected to one side of the bottom fixing member 61. The second end of the first connecting rod 62 is pivotally connected to the first end of the second connecting rod 63. The second end of the second connecting rod 63 is pivotally connected to the first end of the lifting member 64. The second end of the lifting member 64 is pivotally connected to the first end of the third connecting rod 65. The second end of the third connecting rod 65 is pivotally connected to the first end of the fourth connecting rod 66. The second end of the fourth connecting rod 66 is pivotally connected to the other side of the bottom fixing member 61. The pivot points of the third connecting rod 65 and the fourth connecting rod 66 are connected to the output end of the screw drive mechanism 5. The lifting member 64 is connected to the lifting platform 2. The bottom fixing component 61, the first link 62, the second link 63, the lifting component 64, the third link 65, and the fourth link 66 together form a multi-link mechanism. The drive of the screw transmission mechanism 5 causes the multi-link mechanism to deform, thereby driving the lifting platform 2 to rise and fall. Preferably, the cross joint arm assembly 6 is a quick-release universal joint according to ISO 9409-1 standard. The module replacement time is reduced from 4.5 man-hours to 30 minutes, and the overall efficiency is improved by 9 times.

[0025] Please see Figures 4 to 6 The lead screw drive mechanism 5 includes a lead screw 51 and a lead screw nut 52. The lead screw 51 is connected to the output end of the synchronous belt drive mechanism 4. The lead screw 51 and the lead screw nut 52 cooperate with each other. The lead screw nut 52 is connected to the cross joint arm assembly 6. The lead screw 51 rotates under the drive of the synchronous belt drive mechanism 4, which in turn drives the lead screw nut 52 to move. The movement of the lead screw nut 52 on the lead screw 51 drives the movement of the cross joint arm assembly 6. Preferably, the lead screw 51 and the lead screw nut 52 are made of 45# steel, and the yield strength of the lead screw 51 and the lead screw nut 52 is greater than or equal to 355MPa, thereby meeting higher strength requirements.

[0026] Please see Figures 4 to 6 The adjustable-stroke precision crossarm pressing device 100 also includes a guide assembly 7. The guide assembly 7 is located between the frame 1 and the lifting platform 2. The guide assembly 7 includes a guide sleeve 71 and a guide rod 72. The guide sleeve 71 is mounted on the frame 1, one end of the guide rod 72 is connected to the lifting platform 2, and the other end of the guide rod 72 is slidably disposed on the guide sleeve 71. Preferably, the guide assembly 7 is located at the four corners of the lifting platform 2, but is not limited thereto.

[0027] Please see Figures 5 to 6 The transmission wheel 31 has a diameter of 39.8 mm, a tooth pitch of 5 mm, and 25 teeth. The driven wheel 42 has a diameter of 79.6 mm and 50 teeth, which improves the overall transmission accuracy.

[0028] Please see Figures 1 to 6The lead screw transmission mechanism 5 is a double ball screw mechanism with a lead of 5 mm and a precision of C3 grade, thereby achieving better transmission accuracy and improving the lifting accuracy of the lifting platform to meet actual needs.

[0029] Please refer to the following: Figures 1 to 6 The working process of the adjustable stroke precision crossarm pressing device 100 of this utility model is as follows: The servo motor 3 rotates, driving the synchronous belt transmission mechanism 4de via the servo motor 3 (0.01° precision). The driving wheel 41 (Φ39.8mm, 25 teeth) drives the driven wheel 42 (Φ79.6mm, 50 teeth, speed ratio 1:2). That is, the small synchronous wheel drives the large synchronous wheel, which is then driven by the screw transmission mechanism 5 on both sides. In this embodiment, the movement of the two cross joint arm assemblies 6 is linked by double ball screws (lead 5mm) to achieve the precise downward movement of the cross arms. The movement of the cross joint arm assemblies 6 drives the lifting platform 2 to rise and fall.

[0030] Compared with the prior art, the adjustable stroke precision cross arm pressing device 100 of this utility model combines multiple mechanisms such as motor 3, synchronous belt transmission mechanism 4, lead screw transmission mechanism 5 and cross joint arm assembly 6. The synchronous belt transmission mechanism 4 drives the synchronous belt transmission mechanism 4, which in turn drives the lead screw transmission mechanism 5 to move the cross joint arm assembly 6, thereby realizing the precise pressing motion of the lifting platform 2. The speed reduction achieved by the synchronous belt transmission mechanism 4 replaces the traditional multi-stage gearbox. Combined with the real-time closed-loop compensation algorithm, the dynamic positioning accuracy is improved from ±0.15mm in the prior art to ±0.03mm (a 5-fold improvement), which greatly improves its transmission accuracy and achieves sub-millimeter level stroke precision adjustment.

[0031] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model application shall still fall within the scope of the present utility model.

Claims

1. A precision crossarm pressing device with adjustable stroke, characterized in that, The device includes a frame, a lifting platform, and a motor, a synchronous belt drive mechanism, a lead screw drive mechanism, and a cross-arm assembly mounted on the frame. The synchronous belt drive mechanism is mounted at the output end of the motor, the lead screw drive mechanism is mounted at the output end of the synchronous belt drive mechanism, and the cross-arm assembly is mounted at the output end of the lead screw drive mechanism. The lifting platform is connected to the cross-arm assembly. The synchronous belt drive mechanism drives the motor and in turn drives the lead screw drive mechanism. The cross-arm assembly moves under the drive of the lead screw drive mechanism, thereby raising and lowering the lifting platform.

2. The adjustable stroke precision crossarm pressing device as described in claim 1, characterized in that, The screw drive mechanism, the cross joint arm assembly, and the lifting platform are provided in two sets. The two sets of screw drive mechanisms and the two sets of cross joint arm assemblies are located on both sides of the synchronous belt drive mechanism. The synchronous belt drive mechanism synchronously drives the transmission of the two sets of screw drive mechanisms and the movement of the cross joint arm assemblies.

3. The adjustable stroke precision crossarm pressing device as described in claim 2, characterized in that, The synchronous belt drive mechanism includes a driving pulley, a driven pulley, and a synchronous belt. The output end of the motor has a transmission pulley. A driving pulley is provided on both sides of the transmission pulley. Each of the lead screw drive mechanisms on both sides is connected to a driven pulley. The synchronous belt is wound between the transmission pulley, the driving pulley, and the driven pulley. The transmission of the transmission pulley, the driving pulley, and the driven pulley enables the lead screw drive mechanisms on both sides to drive synchronously under the drive of the motor.

4. The adjustable stroke precision crossarm pressing device as described in claim 1, characterized in that, The cross-arm assembly includes a bottom fixing member, a first link, a second link, a lifting member, a third link, and a fourth link. The bottom fixing member is installed on the frame. The first end of the first link is pivotally connected to one side of the bottom fixing member. The second end of the first link is pivotally connected to the first end of the second link. The second end of the second link is pivotally connected to the first end of the lifting member. The second end of the lifting member is pivotally connected to the first end of the third link. The second end of the third link is pivotally connected to the first end of the fourth link. The second end of the fourth link is pivotally connected to the other side of the bottom fixing member. The pivot point of the third and fourth links is connected to the output end of the lead screw drive mechanism. The lifting member is connected to the lifting platform.

5. The adjustable stroke precision crossarm pressing device as described in claim 1, characterized in that, The lead screw transmission mechanism includes a lead screw and a lead screw nut. The lead screw is connected to the output end of the synchronous belt transmission mechanism. The lead screw and the lead screw nut cooperate with each other. The lead screw nut is connected to the cross joint arm assembly. The lead screw rotates under the drive of the synchronous belt transmission mechanism and drives the lead screw nut to move. The movement of the lead screw nut on the lead screw drives the cross joint arm assembly to move.

6. The adjustable stroke precision crossarm pressing device as described in claim 1, characterized in that, It also includes a guide assembly, which is provided between the frame and the lifting platform. The guide assembly includes a guide sleeve and a guide rod. The guide sleeve is installed on the frame, one end of the guide rod is connected to the lifting platform, and the other end of the guide rod is slidably disposed on the guide sleeve.

7. The adjustable stroke precision crossarm pressing device as described in claim 6, characterized in that, The guide components are located at the four corners of the lifting platform.

8. The adjustable stroke precision crossarm pressing device as described in claim 1, characterized in that, The motor is a servo motor.

9. The adjustable stroke precision crossarm pressing device as described in claim 3, characterized in that, The transmission wheel has a diameter of 39.8 mm, a tooth pitch of 5 mm, and 25 teeth. The driven wheel has a diameter of 79.6 mm and 50 teeth.

10. The adjustable stroke precision crossarm pressing device as described in claim 1, characterized in that, The lead screw drive mechanism is a double ball screw mechanism with a lead of 5 mm and an accuracy of C3 grade.

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