Two-way threaded column transmission type grab disc fatigue life detection device

Abstract

The application discloses a bidirectional threaded column transmission type grab disc fatigue life detection device, wherein the bidirectional threaded column is rotatably arranged on a rack and has a closed ring-shaped bidirectional threaded sliding slot; a driving motor drives the bidirectional threaded column to rotate; the reciprocating frame is linearly movably arranged on the rack and has a sliding block in the threaded sliding slot; the double-parabolic guiding disc is fixed on the reciprocating frame and has double-parabolic guiding rails; the linear guiding disc is stacked with the double-parabolic guiding disc on the rack and has leftward and rightward extending linear guiding rails, and the linear guiding rails always intersect with the double-parabolic guiding rails when viewed from above; the fixed disc is stacked below the linear guiding disc and the double-parabolic guiding disc, the fixed disc is used for mounting the grab disc to be detected, the fixed disc is provided with a sliding rod, and the sliding rod is inserted into the double-parabolic guiding rails and the linear guiding rails; the fixed disc is driven by the bidirectional threaded column, the reciprocating frame, the double-parabolic guiding disc and the linear guiding disc to make forward and backward and leftward and rightward reciprocating movement, so that the detection work is quickly and conveniently completed.

Description

Technical Field

[0001] This invention relates to a bidirectional threaded column drive type gripper fatigue life detection device, which is suitable for automated processing and production in industries such as injection molding. Background Technology

[0002] With the development of science and technology, especially the emergence and widespread application of computers, manufacturing has placed increasingly higher demands on automation technology. Automation is developing towards complex system control and advanced intelligent control, and is widely used in various fields such as national defense, scientific research and economy, realizing large-scale automation.

[0003] In automated manufacturing, workpiece gripping is a crucial technology. The fatigue resistance (i.e., fatigue life) of the gripper used to grip the workpiece is a vital indicator to ensure the workpiece does not fall during gripping. However, currently, there is no dedicated device in the industry for testing the fatigue life of grippers. Therefore, based on extensive experience in manufacturing and processing research, the inventors have designed a specialized device that simulates actual processing scenarios to test the fatigue life of grippers. Summary of the Invention

[0004] The purpose of this invention is to provide a bidirectional threaded column drive type gripper fatigue life testing device, which can quickly and conveniently complete the testing work.

[0005] To achieve the above objectives, the solution of the present invention is as follows:

[0006] A fatigue life testing device for a bidirectional threaded column drive gripper includes a frame, a drive motor, a bidirectional threaded column, a reciprocating frame, a double parabolic guide plate, a linear guide plate, and a fixed plate. The bidirectional threaded column is rotatably mounted on the frame. The drive motor is connected to the end of the bidirectional threaded column and drives it to rotate. The bidirectional threaded column has two intersecting threaded grooves that are connected at both ends, forming a closed annular bidirectional threaded groove. The reciprocating frame is mounted on the frame and can move linearly back and forth. The reciprocating frame has a slider located in the threaded groove. The slider, in cooperation with the threaded groove, drives the rotating bidirectional threaded column to move... The reciprocating motion frame performs linear motion; the double parabolic guide plate is fixed on the reciprocating motion frame and has double parabolic guide rails; the linear guide plate is stacked together with the double parabolic guide plate and is fixed on the frame. The linear guide plate has left and right extending linear guide rails, and when viewed from above, the linear guide rails always intersect with the double parabolic guide rails; the fixed plate is stacked below the linear guide plate and the double parabolic guide plate. The fixed plate is used to install the gripper to be tested. The fixed plate has a slide rod that passes through the double parabolic guide rails and the linear guide rails. With the help of the slide rod and the double parabolic guide rails and the linear guide rails, the reciprocating motion frame drives the fixed plate to perform reciprocating motion in all directions.

[0007] The frame has guide cylinders on both sides of the bidirectional threaded column, and the reciprocating motion frame has a corresponding guide rod. The guide rod is inserted into the guide cylinder, and a bearing is installed between the guide rod and the guide cylinder.

[0008] The double parabolic guide rail is composed of two semi-parabolic segments smoothly connected together.

[0009] The reciprocating motion frame consists of an upper frame and a lower frame. The lower frame is mounted on the frame in a linearly movable manner. The slider is located at the front end of the upper frame. The double parabolic guide plate is fixed at the rear end of the lower frame. The rear end of the upper frame is fixedly stacked on the double parabolic guide plate, and a gap is formed between the upper frame and the double parabolic guide plate. The linear guide plate is located in the gap between the upper frame and the double parabolic guide plate.

[0010] Guide rods are formed on both sides of the lower frame, and guide cylinders are provided on both sides of the bidirectional threaded column of the frame. The guide rods are inserted into the guide cylinders, and bearings are installed between the guide rods and the guide cylinders.

[0011] The fixed plate has several slots, on which the gripper to be tested is installed.

[0012] The lower end of the slide rod of the fixed plate is installed on the fixed plate. The slide rod extends upward and passes through the double parabolic guide rail and the linear guide rail. A wear-resistant pad is installed in the middle section of the slide rod. The wear-resistant pad is located between the linear guide plate and the double parabolic guide plate.

[0013] The device also includes a control circuit, a timer, and a gravity sensor. The gravity sensor is mounted on a fixed disk. The control circuit is connected to the timer, the gravity sensor, and the drive motor. The control circuit controls the drive motor to make the device move. The gravity sensor is used to sense whether the gripping of the detection disk on the fixed disk has failed. The gravity sensor transmits the sensing information to the control circuit, and the control circuit controls the timer to record the detection time.

[0014] With the above scheme, during operation, the gripper to be tested is mounted on a fixed plate. The gripper picks up a standard workpiece, the drive motor is started, and the bidirectional threaded column rotates. The bidirectional threaded slide guides the slider, causing the reciprocating frame and the double parabolic guide plate to perform uniform linear reciprocating motion. The slide rod is then guided by the double parabolic guide rail and the linear guide rail. The double parabolic design generates uniform acceleration, which in turn generates uniform inertial force. Furthermore, the double parabolic design makes the acceleration controllable, thus controlling the magnitude of the inertial force. This causes the fixed plate to perform a composite motion of uniform reciprocating motion and uniformly accelerated reciprocating motion, thereby driving the gripper to perform a composite reciprocating motion. The time it takes for the workpiece to fall off the gripper is recorded to obtain the fatigue life of the gripper. By defining the testing conditions (testing basis) during testing, the test results are more reliable.

[0015] This invention enables the detection of the fatigue life of the gripper disc by driving it to reciprocate in the direction of forward, backward, left and right, and to perform a mixture of uniform and accelerated motion in terms of speed, forming a composite motion that simulates automated operation. This allows for a fast and convenient detection process. Attached Figure Description

[0016] Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 ;

[0017] Figure 2 This is a three-dimensional illustration of the present invention. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the structure of the bidirectional threaded column of the present invention;

[0019] Figure 4 This is a schematic diagram of the reciprocating motion frame of the present invention;

[0020] Figure 5 This is a schematic diagram of the structure of the double parabolic guide disk of the present invention;

[0021] Figure 6 This is a schematic diagram of the slide bar of the fixed plate of the present invention.

[0022] Label Explanation:

[0023] Frame 1, guide cylinder 11;

[0024] Drive motor 2;

[0025] Bidirectional threaded column 3, threaded groove 31;

[0026] Reciprocating motion frame 4, slider 41, upper frame 42, lower frame 43, guide rod 44;

[0027] Double parabolic guide disk 5, double parabolic guide rail 51, parabola L1, parabola L2;

[0028] Linear guide plate 6, linear guide rail 61;

[0029] Fixed plate 7, slide bar 71, locking position 72, wear-resistant pad 73. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] This invention provides a bidirectional threaded column drive type gripper fatigue life detection device, such as... Figures 1 to 6 As shown, it includes a frame 1, a drive motor 2, a bidirectional threaded column 3, a reciprocating motion frame 4, a double parabolic guide plate 5, a linear guide plate 6, and a fixed plate 7.

[0032] The frame 1 is used to install and fix other parts of the entire device, so that the entire device is integrated together.

[0033] The bidirectional threaded column 3 is rotatably mounted on the frame 1. The drive motor 2 is connected to the end of the bidirectional threaded column 3 and drives the bidirectional threaded column 3 to rotate. The bidirectional threaded column 3 has two intersecting threaded grooves 31, and the two threaded grooves 31 are connected at both ends to form a closed annular bidirectional threaded groove 31.

[0034] The reciprocating motion frame 4 is mounted on the frame 1 in a manner that allows it to move linearly back and forth. The reciprocating motion frame 4 has a slider 41, which is located in the threaded groove 31. By means of the cooperation between the slider 41 and the threaded groove 31, the rotating bidirectional threaded column 3 can drive the reciprocating motion frame 4 to make linear motion.

[0035] The double parabolic guide disk 5 is fixed on the reciprocating motion frame 4, and the double parabolic guide disk 5 has a double parabolic guide rail 51. Specifically, the double parabolic guide rail 5 can be formed by smoothly connecting two half-parabolic curves L1 and L2. The double parabolic guide disk 5 can move linearly together with the reciprocating motion frame 4.

[0036] The linear guide disk 6 and the double parabolic guide disk 5 are stacked together. The linear guide disk 6 is fixed on the frame 1. The linear guide disk 6 has a linear guide rail 61 extending to the left and right. When viewed from above, the linear guide rail 61 always intersects with the double parabolic guide rail 51.

[0037] The fixed plate 7 is stacked below the linear guide plate 6 and the double parabolic guide plate 5. The fixed plate 7 is used to install the gripper to be tested (the gripper is not shown in the figure). The fixed plate 7 may have several locking positions 72, on which the gripper to be tested is installed, so that multiple grippers can be tested at once. The fixed plate 7 has a slide rod 71, which passes through the double parabolic guide rail 51 and the linear guide rail 61. With the cooperation of the slide rod 71 with the double parabolic guide rail 51 and the linear guide rail 61, the reciprocating motion frame 4 can drive the fixed plate 7 to perform reciprocating motion in the front, back and left and right directions.

[0038] When this invention is used for testing, the gripper to be tested is mounted on the fixed plate 7, and the gripper further grips the standard workpiece for testing. The standard workpiece can be a workpiece selected from the gripping range of the gripper. Start the drive motor 2, which drives the bidirectional threaded column 3 to rotate. The bidirectional threaded groove 31 guides the slider 41, which slides back and forth between the front and rear ends of the bidirectional threaded groove 31. This causes the reciprocating motion frame 4 and the double parabolic guide plate 5 to perform uniform linear reciprocating motion. The double parabolic guide rail 51 and the linear guide rail 61 then guide the slide rod 71, which slides back and forth between the leftmost and rightmost ends of the double parabolic guide rail 51. Because the double parabolic guide rail 51 causes the slide rod 71 to produce uniform acceleration, the uniform acceleration generates a uniform inertial force. Moreover, the double parabola makes the acceleration controllable, thus making the magnitude of the inertial force controllable. As a result, the fixed plate 7 performs a compound motion of uniform acceleration in reciprocating left and right and uniform speed in reciprocating back and forth. In turn, this drives the gripper plate to be tested on the fixed plate 7 to perform a compound motion of reciprocating back and forth left and right, forming a compound motion simulating automated operation. Observe and record the time it takes for the workpiece to fall off the gripper plate to obtain the fatigue life of the gripper plate. Thus, under defined testing conditions, this invention completes the testing of the fatigue life of the gripper disc, making the testing process fast, convenient, and the results more reliable.

[0039] The optimized design of this invention is that the reciprocating motion frame 4 consists of an upper frame 42 and a lower frame 43. The lower frame 43 is mounted on the frame 1 in a linearly movable manner. Specifically, guide rods 44 can be formed on both sides of the lower frame 43. The frame 1 has guide cylinders 11 on both sides of the bidirectional threaded column 3. The guide rods 44 are inserted into the guide cylinders 11. The guide cylinders 11 and guide rods 44 cooperate to guide the linear movement of the reciprocating motion frame 4 on the frame 1. A bearing (not shown in the figure) can also be installed between the guide rods 44 and the guide cylinders 11 to make the movement smoother. A slider 41 is provided at the front end of the upper frame 42. The reciprocating motion frame 4 is driven to move linearly by the threaded groove 31 cooperating with the slider 41. The double parabolic guide disk 5 is fixed to the rear end of the lower frame 43. The rear end of the upper frame 42 is fixedly stacked on the double parabolic guide disk 5, and a gap is formed between the upper frame 42 and the double parabolic guide disk 5. A linear guide disk 6 is disposed in the gap between the upper frame 42 and the double parabolic guide disk 5. Furthermore, the lower end of the slide rod 71 of the fixed disk 7 is mounted on the fixed disk 7, and the slide rod 71 extends upward and passes through the double parabolic guide rail 51 and the linear guide rail 61. A wear-resistant pad 73 is installed in the middle section of the slide rod 71, and the wear-resistant pad 73 is located between the linear guide disk 6 and the double parabolic guide disk 5. In this way, the entire device has a compact structure and smooth transmission.

[0040] This invention further optimizes the design by including a control circuit, a timer, and a gravity sensor. Since these are common components, they are not shown in the figures. The gravity sensor is mounted on the fixed disk 7 and is used to sense whether the gripper on the fixed disk 7 has failed to grasp the workpiece (the grasped workpiece has fallen). The control circuit is connected to the timer, gravity sensor, and drive motor 2. The control circuit controls the drive motor 2 to move the device. The gravity sensor transmits the sensing information to the control circuit, which then controls the timer to record the detection time. When the gravity sensor detects that the gripper on the fixed disk 7 has failed, the time recorded by the timer is the fatigue life of the gripper. Thus, this invention enables automatic detection.

[0041] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0042] The directional terms such as up, down, left, right, front, back, front, back, top, and bottom mentioned or possibly used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the design of this case. All equivalent changes made based on the key design features of this case shall fall within the protection scope of this case.

Claims

1. A bidirectional screw column transmission type grab disc fatigue life detection device, characterized in that: The device comprises a frame, a driving motor, a bidirectional threaded column, a reciprocating frame, a double-parabolic guiding disc, a linear guiding disc and a fixed disc; the bidirectional threaded column is rotatably arranged on the frame, the driving motor is connected to the end of the bidirectional threaded column and drives the rotation of the bidirectional threaded column, the bidirectional threaded column has two thread grooves intersecting with each other and communicating at both ends, forming a closed ring-shaped bidirectional threaded groove; the reciprocating frame is linearly movably arranged on the frame, and has a sliding block in the thread groove; the double-parabolic guiding disc is fixed on the reciprocating frame and has a double-parabolic guiding rail; the linear guiding disc is stacked with the double-parabolic guiding disc, and has a linear guiding rail extending leftward and rightward; the fixed disc is stacked below the linear guiding disc and the double-parabolic guiding disc, and is used for mounting a to-be-detected grabbing disc; the fixed disc has a sliding rod inserted in the double-parabolic guiding rail and the linear guiding rail, and the reciprocating frame drives the fixed disc to move back and forth.

2. The bidirectional threaded post drive type grab bucket fatigue life testing device according to claim 1, characterized in that: The frame is provided with guiding cylinders on both sides of the bidirectional threaded column, and the reciprocating frame is correspondingly provided with guiding rods inserted in the guiding cylinders, and bearings are arranged between the guiding rods and the guiding cylinders.

3. The bidirectional threaded post drive type grab bucket fatigue life testing device according to claim 1, characterized in that: The double-parabolic guiding rail is formed by two half-parabolic lines smoothly connected.

4. The bi-directional threaded post drive type grab bucket fatigue life testing device according to claim 1, characterized in that: The reciprocating frame is composed of an upper frame and a lower frame, the sliding block is arranged at the front end of the upper frame, the lower frame is linearly movably arranged on the frame, the double-parabolic guiding disc is fixed at the rear end of the lower frame, the rear end of the upper frame is fixedly stacked on the double-parabolic guiding disc, and a gap is formed between the upper frame and the double-parabolic guiding disc, and the linear guiding disc is arranged in the gap.

5. The bi-directional threaded post drive type grab claw fatigue life testing device according to claim 4, characterized in that: The lower frame is provided with guiding rods on both sides, the frame is provided with guiding cylinders on both sides of the bidirectional threaded column, and the guiding rods are inserted in the guiding cylinders, and bearings are arranged between the guiding rods and the guiding cylinders.

6. The bi-directional threaded post drive type fatigue life testing device for a grab bucket according to claim 1, wherein: The fixed disc is provided with a plurality of clamping positions, and the to-be-detected grabbing disc is arranged on the clamping positions.

7. The bi-directional threaded post drive type grab claw fatigue life testing device according to claim 1, characterized in that: The lower end of the sliding rod of the fixed disc is arranged on the fixed disc, the sliding rod extends upward and is inserted in the double-parabolic guiding rail and the linear guiding rail, a wear-resistant gasket is arranged in the middle of the sliding rod, and the wear-resistant gasket is located between the linear guiding disc and the double-parabolic guiding disc.

8. The bi-directional threaded post drive type grab claw fatigue life testing device according to claim 1, characterized in that: The device further comprises a control circuit and a timer, and a gravity sensor, the gravity sensor is arranged on the fixed disc, the control circuit is connected with the timer, the gravity sensor and the driving motor, the control circuit controls the driving motor to work and drive the device to move, the gravity sensor senses whether the to-be-detected grabbing disc is invalid, the gravity sensor transmits sensing information to the control circuit, and the control circuit controls the timer to record the detection time.

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