Force value monitoring device for elastic cylindrical pin assembly

Abstract

The invention discloses a force value monitoring device for assembling an elastic cylindrical pin, which is characterized in that a plurality of contact rods are abutted against assembling devices with different shapes, so that the contact rods at different parts are extruded by different contact surfaces of the devices to move into a storage cylinder for different distances, and under the elastic force of a reciprocating spring, the elastic cylindrical pin can be automatically assembled. When the device is placed stably, the electric field box is started to form an electric field around the electric field box, the liquid electrorheological fluid in the electric field box is converted into a solid state, the position of the contact rod is fixed, and therefore the device is clamped.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical assembly detection, and in particular to a force value monitoring device for elastic cylindrical pin assembly. Background Art

[0002] The force monitoring device for elastic cylindrical pin assembly is a device used to experiment, monitor and record the force applied to the elastic cylindrical pin during the assembly process. This device can ensure the quality control and safety of the assembly process, and also helps to optimize the assembly process and improve production efficiency. The main components of the monitoring device include sensors, assembly frames for fixing sensors and assembly devices, data acquisition systems, alarm systems, and recording and storage systems.

[0003] During the experiment or assembly process, the elastic cylindrical pin is affected by certain external forces such as pressure, tension and friction. Sensors are required to convert these force values ​​into electrical signals and process and record them through the data acquisition system. Operators can view the force value change curve in real time through the display screen and adjust and control it as needed. When the force value exceeds the preset safety range, the alarm system will sound an alarm to remind the operator to pay attention.

[0004] During use, attention should be paid to calibration and testing of the sensor to ensure its accuracy and stability. During assembly, the connection between the sensor and the elastic cylindrical pin should be firm and reliable to avoid loosening or falling off. Operators should be familiar with the use and operation procedures of the monitoring device so that they can correctly monitor and record, and regularly maintain and service the monitoring device to ensure its long-term stable operation. However, the existing monitoring devices use too simple fixtures to fix assembly devices of different shapes, especially for special-shaped devices, which cannot be effectively fixed, resulting in loosening of the device during assembly and displacement between the elastic cylindrical pin, affecting the monitoring data. Summary of the invention

[0005] The present application proposes a force monitoring device for elastic cylindrical pin assembly, which has multiple contact rods that abut different surfaces of a device for multi-point contact fixation. The contact rods are squeezed and moved by the device surface to push the hydraulic oil to squeeze other contact rods to abut the device surface that is difficult to contact. The liquid electrorheological fluid is converted into a solid state under the action of the electric field to fix and clamp the contact rod of the contact device. The moving contact rod squeezes the electrorheological fluid to flow and stir and mix. This is used to solve the problem that the existing force monitoring device for elastic cylindrical pin assembly cannot cope with devices of different shapes when clamping the device.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical scheme: a force monitoring device for assembling elastic cylindrical pins, comprising a monitoring frame and four clamps installed on the monitoring frame; the clamp comprises a back plate, an electric field box connected to one end of the back plate, and a sealing plate connected to one side of the electric field box; a uniformly distributed storage tube is provided on the end of the back plate facing the electric field box; a contact rod is provided in the storage tube and extends out of the sealing plate to the outside of the electric field box for clamping the contact device; a reciprocating spring is fixedly connected to one end of the contact rod located in the storage tube for providing force to squeeze the device to the contact rod; the electric field box is filled with electrorheological fluid for fixing the contact rod after movement.

[0007] Preferably, a crossbeam is provided at the top center of the monitoring frame, and a sensor mounting frame is provided at the bottom end of the crossbeam for stably mounting the monitoring sensor.

[0008] Preferably, a symmetrical slide is provided on the bottom top plane of the monitoring frame, and hydraulic cylinders are symmetrically arranged at both ends of the long sides of the slide. A hydraulic rod is arranged in the hydraulic cylinder, and the end of the hydraulic rod away from the hydraulic cylinder is connected to a limit block, and the limit block is connected to the bottom end of the electric field box to drive the clamp to perform reciprocating linear motion.

[0009] Preferably, the contact rod is provided with evenly distributed inwardly sunken annular grooves for stirring the surrounding electrorheological fluid and fixing the contact rod after the electrorheological fluid solidifies.

[0010] Preferably, adjacent storage cylinders are connected with interconnecting tubes, and the storage cylinders are filled with hydraulic oil for pressing the squeezed hydraulic oil into the storage cylinders connected to the contact rods of the empty rows.

[0011] Preferably, evenly distributed movable holes are opened in the back plate, and connecting holes are opened between the bottoms of adjacent movable holes. A vertical flow hole is opened in the center of the connecting hole and connected to the inner cavity of the electric field box to provide a channel for the flow of electrorheological fluid.

[0012] Preferably, one end of a single movable hole facing the inner cavity of the electric field box is connected to the inner cavity of one of the storage tubes, a piston is provided in the movable hole, one end of the piston facing the contact rod is connected to an end of a reciprocating spring away from the contact rod, for receiving the force of the contact rod movement.

[0013] Preferably, two limiting rings are provided on one side of the inner cavity of the storage cylinder close to the back plate, and the interconnection tube is located between the two limiting rings for limiting the moving distance of the piston and the contact rod.

[0014] Preferably, hanging springs are respectively arranged at the four corners of the top of the inner cavity of the electric field box, and the bottom ends of the hanging springs are fixedly connected with blocking plates to provide more flow directions and spaces for the electrorheological fluid.

[0015] The present application provides a force monitoring device for elastic cylindrical pin assembly, which abuts against assembly devices of different shapes through multiple contact rods, so that the contact rods at different positions are squeezed by different contact surfaces of the device and move different distances into the storage tube, and under the elastic force of the reciprocating spring, the contact rods at different positions are always in contact with different contact surfaces of the device. When the device is placed stably, the electric field box is started to form an electric field around the electric field box, so that the liquid electrorheological fluid in the electric field box is converted into a solid state, the position of the contact rod is fixed, and the device is clamped.

[0016] At the same time, when the contact rod moves into the storage cylinder, the hydraulic oil in the storage cylinder will be squeezed and flow to other storage cylinders through the interconnecting tubes connected to the adjacent storage cylinders, especially the storage cylinder connected to the contact rod that is located in the recessed part of the device and cannot contact the bottom of the recessed part of the device. More hydraulic oil will be pressed into the storage cylinder, pushing the contact rod here to move toward the direction of the device, so that the contact rod here can abut against the part of the device that was originally incontactable, thereby increasing the clamping point between the device and the clamp, improving the clamping effect, and reducing clamping damage.

[0017] At the same time, when the contact rod moves into the storage cylinder, the hydraulic oil in the storage cylinder squeezes the piston to move away from the storage cylinder, so that the electrorheological fluid in the active hole enters the connecting hole under the squeeze, and impacts with the electrorheological fluid in other active holes and enters the connecting hole to be stirred and mixed, and finally discharged into the electric field box through the flow hole, pushing the electrorheological fluid in the electric field box to flow, so that the electrorheological fluid in the electric field box flows between the storage cylinder and the contact rod, disperses and converges, thereby eliminating the sedimentation and stratification of the electrorheological fluid in the electric field box, and avoiding the performance degradation of the electrorheological fluid due to long-term non-flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application.

[0019] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which: Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the structure distribution of the present invention; Figure 3 It is a schematic diagram of the structure of the electric field box of the present invention; Figure 4 This is a schematic diagram of the internal structure distribution of the electric field box of the present invention; Figure 5 This is a schematic diagram of the backplane structure of the present invention; Figure 6 For the present invention Figure 5A partial enlarged schematic diagram of the structure at point A in the middle.

[0020] Among them: 1. Monitoring frame; 2. Crossbeam; 3. Sensor mounting frame; 4. Slide; 5. Hydraulic cylinder; 51. Hydraulic rod; 6. Limit block; 7. Back plate; 8. Electric field box; 9. Sealing plate; 10. Movable hole; 11. Connecting hole; 12. Flow hole; 13. Piston; 14. Storage cylinder; 15. Contact rod; 151. Recessed annular groove; 16. Reciprocating spring; 17. Interconnection tube; 18. Limit ring; 19. Blocking plate; 20. Suspension spring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. Embodiment 1

[0022] See also Figure 1 to Figure 2 , a force monitoring device for elastic cylindrical pin assembly, comprising a monitoring frame 1, a crossbeam 2 is fixedly connected to the top center of the monitoring frame 1, and a sensor mounting frame 3 is fixedly connected to the bottom end of the crossbeam 2, and the monitoring sensor is stably mounted on the sensor mounting frame 3, and is in stable contact with the assembly device clamped by the clamp below. A symmetrical slide 4 is opened on the top plane of the bottom of the monitoring frame 1, and a hydraulic cylinder 5 is fixedly sleeved at both ends of the long side of the slide 4, and a hydraulic rod 51 is movably sleeved in the hydraulic cylinder 5. The end of the hydraulic rod 51 away from the hydraulic cylinder 5 is fixedly connected to a limit block 6, and the limit block 6 is movably sleeved in the slide 4, and the side wall of the limit block 6 is in contact with the side wall of the slide 4, and the bottom end of the limit block 6 is in contact with the bottom end of the slide 4, so that when the hydraulic cylinder 5 is started, the limit block can be driven by the hydraulic rod 51 to perform reciprocating linear motion under the restriction of the slide 4, thereby driving the clamp to perform reciprocating linear motion, and contacting and extruding assembly devices of different sizes.

[0023] See also Figures 1 to 4 The top of the limit block 6 is fixedly connected to an electric field box 8, which is filled with electrorheological fluid. The electric field box 8 is provided with winding wires, so that when the wires in the electric field box 8 are energized, an electric field can be formed around the electric field box 8, so that the liquid electrorheological fluid is converted into a solid state. When the clamp releases the device, the wires will be powered off, the electric field will disappear, and the solid electrorheological fluid will be converted into a liquid again. The end of the electric field box 8 close to the hydraulic cylinder 5 is fixedly connected to a back plate 7, and the end of the electric field box 8 away from the hydraulic cylinder 5 is bolted with a sealing plate 9. The electric field box 8 is sealed by the back plate 7 and the sealing plate 9 to prevent leakage of the electrorheological fluid.

[0024] See also Figures 4 to 6 , one end of the back plate 7 facing the inside of the electric field box 8 is fixedly connected with a uniformly distributed storage tube 14, and a contact rod 15 is movably sleeved in the storage tube 14. One end of the contact rod 15 located in the storage tube 14 is fixedly connected with a reciprocating spring 16, and the other end of the contact rod 15 passes through the sealing plate 9 to the outside of the electric field box 8, so that when the end of the contact rod 15 on the outside follows the movement of the fixture to approach the assembly device, this end of the contact rod 15 can be squeezed on the outer surface of the device. As the fixture continues to move, the contact rod 15 moves toward the storage tube 14 under the reaction force, compressing the reciprocating spring 16, so that the contact rod 15 abuts against the device surface under the elastic force of the compressed reciprocating spring 16, so that the contact rods 15 at different parts abut against the outer surface of the device at different positions, and the outer surface of the special-shaped device can still be contact-extruded. After the electrorheological fluid is converted into a solid state, the moved contact rod 15 is fixed in position, so The device is clamped, and when the electrorheological fluid is converted into liquid again, the clamp is driven away from the device by the hydraulic rod 51, and the compressed reciprocating spring 16 will push the contact rod 15 to move and reset. The contact rod 15 is located in the electric field box 8 and is provided with evenly distributed sunken annular grooves 151. The sunken annular grooves 151 do not separate from the electric field box 8, so that when the contact rod 15 reciprocates in the electric field box 8, the sunken annular grooves 151 can scrape the nearby electrorheological fluid, causing the surrounding electrorheological fluid to flow, thereby stirring the electrorheological fluid to a certain extent, eliminating the sedimentation and stratification of the electrorheological fluid in the electric field box, and avoiding the performance degradation of the electrorheological fluid due to long-term non-flow. After the electrorheological fluid becomes solid, the sunken annular grooves 151 will form a fixed socket with the solid electrorheological fluid, hindering the linear reciprocating motion of the contact rod 15, further ensuring that the position of the contact rod 15 remains unchanged at this time, and the device cannot be effectively displaced at this time. Embodiment 2

[0025] See also Figures 4 to 6On the basis of the first embodiment, an interconnection tube 17 is fixedly connected between adjacent storage tubes 14, and the storage tube 14 is filled with hydraulic oil, so that when the contact rod 15 moves into the storage tube 14, the hydraulic oil in the storage tube 14 will be squeezed and flowed into other storage tubes 14 through the interconnection tube 17 connected to the adjacent storage tube 14, especially in the storage tube 14 connected to the contact rod 15 located in the recessed part of the device and unable to contact the bottom of the recessed part of the device, more hydraulic oil will be pressed into the storage tube 14, pushing the contact rod 15 here to move in the direction of the device, so that the contact rod 15 here can abut against the part of the device that was originally unable to contact. At this time, the reciprocating spring 16 here is stretched, thereby increasing the clamping point between the device and the clamp, improving the clamping effect, and reducing the clamping damage. In this process, there is a part of the contact rod 15 and another part of the contact rod 15 moving in opposite directions. At this time, the inner recessed annular groove 151 on the contact rod 15 pushes the flow direction of the electrorheological fluid to be opposite, so that the electrorheological fluids flowing in opposite directions impact each other, thereby further improving the mixing and stirring effect of the electrorheological fluid.

[0026] When the electrorheological fluid is converted into liquid again, the clamp is driven away from the device by the hydraulic rod 51, and the reciprocating spring 16 stretched here will pull the contact rod 15 to move and reset. Embodiment 3

[0027] See also Figure 5 to Figure 6On the basis of the second embodiment, the back plate 7 is provided with uniformly distributed active holes 10, and the bottoms of adjacent active holes 10 are provided with interconnecting connecting holes 11, and the center of the connecting hole 11 is provided with a vertical flow hole 12 connected to the inner cavity of the electric field box 8, so that the electrorheological fluid in the electric field box 8 can enter the active holes 10 through the flow hole 12 and the connecting hole 11 when in a liquid state, and vice versa, and the electrorheological fluid in all active holes 10, especially the adjacent active holes 10, can be contacted, mixed and exchanged through the connecting hole 11, and one end of a single active hole 10 facing the inner cavity of the electric field box 8 is connected to one of the storage tubes 14. The inner cavity is connected, and a piston 13 is movably sleeved in the movable hole 10. The end of the piston 13 facing the contact rod 15 is fixedly connected to the end of the reciprocating spring 16 away from the contact rod 15, so that when the contact rod 15 moves into the storage tube 14, it can squeeze the reciprocating spring 16, so that the reciprocating spring 16 pushes the piston 13 to move in the same direction, so that the piston 13 squeezes the electrorheological fluid in the movable hole 10 into the connecting hole 11, and impacts with the electrorheological fluid in the connecting hole 11 from other movable holes 10 to stir and mix, and finally discharges into the electric field box 8 through the flow hole 12, pushing the electrorheological fluid in the electric field box 8 to flow. The electrorheological fluid in the electric field box 8 flows between the storage tube 14 and the contact rod 15 to disperse and merge, thereby eliminating the sedimentation and stratification of the electrorheological fluid in the electric field box 8 and avoiding the performance degradation of the electrorheological fluid due to long-term non-flow. It should be noted that in this process, when the electrorheological fluid fills the inner cavity of the electric field box 8, the size of the flowable space of the electrorheological fluid is fixed. At this time, the storage tube 14 connected to the contact rod 15 without contact devices will be back-pressed into the excess hydraulic oil in other storage tubes 14, and new electrorheological fluid will also be pressed into the active hole 10 connected to this storage tube 14. At this time, the pressure The injected hydraulic oil applies pressures of the same magnitude and opposite directions to the contacting piston 13 and contact rod 15. The pressure of the newly injected electrorheological fluid comes from the pressure provided by the other contact rod 15 moving toward the direction of the piston 13. That is to say, the force exerted by the injected electrorheological fluid on the piston 13 at this time is opposite to the force exerted by the hydraulic oil, which will offset the force exerted by the hydraulic oil on the piston 13. The contact rod 15 here will move toward the device direction under the push of the injected hydraulic oil, and the piston 13 here will also move toward the device direction under the push of the injected electrorheological fluid, thereby extending the distance that the contact rod 15 here can move toward the device direction.

[0028] See also Figure 6 Two limit rings 18 are fixedly sleeved on one side of the inner cavity of the storage cylinder 14 close to the back plate 7, and the interconnection tube 17 is located between the two limit rings 18, so that when the piston 13 moves toward the storage cylinder 14, it will be hindered by the adjacent limit rings 18 and cannot continue to move. The same is true for the contact rod 15, so that the electrorheological fluid in the movable hole 10 will not be connected to the interconnection tube 17, resulting in the problem of mixing of the electrorheological fluid and the hydraulic oil. Embodiment 4

[0029] See also Figure 4 On the basis of the third embodiment, the four corners of the top of the inner cavity of the electric field box 8 are fixedly connected with hanging springs 20, and the bottom end of the hanging spring 20 is fixedly connected with a blocking plate 19. The side wall of the blocking plate 19 is in contact with the inner wall of the electric field box 8, and a sealing ring is provided. The space above the blocking plate 19 is vacant, and the space below the blocking plate 19 is filled with electrorheological fluid. When the electrorheological fluid in the active hole 10 is pressed, most of the electrorheological fluid will be pressed into the space below the blocking plate 19. At this time, the pressed electrorheological fluid will push the blocking plate 19 upward, so that the blocking plate 19 is lifted and the hanging spring 20 is compressed, so that most of the electrorheological fluid can flow between the storage tube 14 and the contact rod 15 for dispersion, convergence and stirring. At this time, since the blocking plate 19 can move upward, a certain space is provided for the discharge of the electrorheological fluid in the active hole 10, and there is no contact device in the storage tube 14 connected to the contact rod 15. , and the excess hydraulic oil in other storage cylinders 14 is pressed back into the active hole 10 connected to this storage cylinder 14, and the electrorheological fluid pressed into it will be reduced. At this time, the hydraulic oil pressed in exerts pressures of the same magnitude and opposite directions on the contacting piston 13 and contact rod 15. The force exerted by the pressed electrorheological fluid on the piston 13 is opposite to the force exerted by the hydraulic oil, and can only offset a part of the force exerted by the hydraulic oil on the piston 13. Only after the suspension spring 20 completely blocks the baffle plate 19 from continuing to move upward, can the excess electrorheological fluid be pressed into these active holes 10 more, avoiding the problem that most of the contact rods 15 contact the device, resulting in a large amount of electrorheological fluid being pressed out of the active hole 10 and having nowhere to flow. After the clamp releases the device, the suspension spring 20 will push the baffle plate 19 downward to squeeze the electrorheological fluid, and flow back into the active hole 10, pushing the piston 13 to reset, providing sufficient flow space for the next piston to squeeze the electrorheological fluid.

[0030] It should be noted that in the above process, the lifting of the baffle plate 19 is staged. When the suspension spring 20 is compressed to a certain extent, the downward force applied to the baffle plate 19 will offset the upward force of the electrorheological fluid. At this time, since some of the contact rods 15 have not yet contacted the device, the electrorheological fluid will be pressed into the movable holes 10 behind these contact rods 15, pushing the piston 13 to move. As the number of contact rods contacting the device gradually increases, the number of movable holes 10 that can carry the electrorheological fluid gradually decreases. At this time, the baffle plate 19 will move up again, and the suspension spring 20 will be compressed again until it can no longer be compressed. This staged movement will cause the flow of the electrorheological fluid to be more complex and changeable.

Claims

1. A force monitoring device for elastic cylindrical pin assembly, characterized in that: It comprises a monitoring frame (1) and four fixtures installed on the monitoring frame (1); The clamp comprises a back plate (7), an electric field box (8) connected to one end of the back plate (7), and a sealing plate (9) connected to one side of the electric field box (8); a uniformly distributed storage tube (14) is arranged on one end of the back plate (7) facing the electric field box (8); a contact rod (15) is arranged in the storage tube (14) and extends out of the sealing plate (9) to the outside of the electric field box (8) for contacting a device for clamping; a reciprocating spring (16) is fixedly connected to one end of the contact rod (15) located in the storage tube (14) for providing a force for squeezing the device to the contact rod (15); and an electrorheological fluid is filled in the electric field box (8) for fixing the contact rod (15) after it moves.

2. A force monitoring device for elastic cylindrical pin assembly according to claim 1, characterized in that: A crossbeam (2) is arranged at the top centre of the monitoring frame (1), and a sensor mounting frame (3) is arranged at the bottom end of the crossbeam (2) for stably mounting a monitoring sensor.

3. A force monitoring device for elastic cylindrical pin assembly according to claim 1, characterized in that: A symmetrical slideway (4) is provided on the top plane of the bottom of the monitoring frame (1), and hydraulic cylinders (5) are symmetrically arranged at both ends of the long sides of the slideway (4). A hydraulic rod (51) is arranged in the hydraulic cylinder (5), and one end of the hydraulic rod (51) away from the hydraulic cylinder (5) is connected to a limit block (6), and the limit block (6) is connected to the bottom end of the electric field box (8) and is used to drive the clamp to perform reciprocating linear motion.

4. A force monitoring device for elastic cylindrical pin assembly according to claim 1, characterized in that: The contact rod (15) is provided with evenly distributed inwardly sunken annular grooves (151) for stirring the surrounding electrorheological fluid and fixing the contact rod (15) after the electrorheological fluid solidifies.

5. A force monitoring device for elastic cylindrical pin assembly according to claim 1, characterized in that: An interconnecting tube (17) is connected between adjacent storage cylinders (14), and the storage cylinders (14) are filled with hydraulic oil for pressing the squeezed hydraulic oil into the storage cylinder (14) connected to the empty contact rod (15).

6. A force monitoring device for elastic cylindrical pin assembly according to claim 5, characterized in that: The back plate (7) is provided with evenly distributed movable holes (10), the bottoms of adjacent movable holes (10) are provided with interconnected communication holes (11), and the centers of the communication holes (11) are provided with vertical flow holes (12) connected to the inner cavity of the electric field box (8) to provide a channel for the flow of electrorheological fluid.

7. A force monitoring device for elastic cylindrical pin assembly according to claim 6, characterized in that: One end of a single movable hole (10) facing the inner cavity of the electric field box (8) is connected to the inner cavity of one of the storage tubes (14); a piston (13) is arranged in the movable hole (10); one end of the piston (13) facing the contact rod (15) is connected to an end of a reciprocating spring (16) away from the contact rod (15) for receiving the force of the movement of the contact rod (15).

8. A force monitoring device for elastic cylindrical pin assembly according to claim 7, characterized in that: Two limiting rings (18) are arranged on one side of the inner cavity of the storage cylinder (14) close to the back plate (7), and the interconnection tube (17) is located between the two limiting rings (18) and is used to limit the movement distance of the piston (13) and the contact rod (15).

9. A force monitoring device for elastic cylindrical pin assembly according to claim 8, characterized in that: Hanging springs (20) are respectively arranged at the four corners of the top end of the inner cavity of the electric field box (8), and the bottom ends of the hanging springs (20) are fixedly connected to blocking plates (19) for providing more flow directions and spaces for the electrorheological fluid.

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