A servo motor cylinder endurance experiment device

Abstract

The utility model discloses a kind of servo electric cylinder endurance experimental device, comprising: a frame, connecting bottom plate is installed on it;Multiple front guide rods, end portion is connected with the frame;Front lower support plate, length direction can be moved along multiple front guide rods, and trunnion fixing seat for fixing electric cylinder end portion is equipped on front lower support plate;Chain wheel suite, setting on frame, chain wheel suite is equipped with chain, and one end of chain is connected with the front lower support plate;And multiple groups of counterweight suite, setting on connecting bottom plate, and being connected with the other end of chain.The utility model structure is simple, through the configuration multiple groups adjustable counterweight suite and pull rod collaborative work, can flexibly adjust loading load according to the thrust demand of different servo electric cylinder, and counterweight adjustment range is big, can cover multiple working condition conditions.Simultaneously, test bench structure design gives consideration to compatibility, and electric cylinder of different specifications and stroke is facilitated to install, and the applicability and versatility of equipment are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of servo electric cylinder experimental devices, specifically a servo electric cylinder durability testing device. Background Technology

[0002] A servo electric cylinder is an actuator that uses a servo motor as a drive source and converts rotary motion into linear reciprocating motion through precision transmission mechanisms such as lead screws and ball screws. Due to its advantages of high positioning accuracy, fast response, programmable control, and clean and efficient operation, it has been widely used in automated production lines, construction machinery, and logistics handling equipment—fields with high motion control requirements. As the application scenarios of servo electric cylinders continue to expand, the requirements for their service life and operational reliability are also increasing. In the process of new product development, performance verification, and quality inspection, conducting durability tests is a crucial step in evaluating their long-term service performance under different loads and operating conditions.

[0003] However, existing servo electric cylinder durability testing benches generally have many shortcomings. Most testing devices apply loads using a fixed counterweight, making it difficult to flexibly adjust the loading force and failing to realistically simulate the varying load conditions in actual working conditions. Furthermore, some test benches suffer from insufficient structural rigidity and low precision in their guiding mechanisms, which can easily lead to uneven loading or motion jamming during testing, affecting transmission stability and the accuracy of test results. Therefore, a servo electric cylinder durability testing device is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a servo electric cylinder durability testing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a servo electric cylinder durability testing device, comprising: A frame on which a connecting base plate is mounted; Multiple front guide rods, the ends of which are connected to the frame; The front lower support plate can move along the length direction of multiple front guide rods, and the front lower support plate is provided with a trunnion fixing seat for fixing the end of the electric cylinder; A sprocket assembly, mounted on the frame, having a chain on the assembly, one end of which is connected to the front lower support plate; and Multiple sets of counterweight components are mounted on a connecting base plate and connected to the other end of a chain. The connecting base plate is also provided with multiple sets of pull rods whose ends pass through the multiple sets of counterweight components, and limit blocks are installed at the ends of the multiple sets of pull rods to limit the position of the multiple sets of counterweight components. The limit blocks can be adjusted along the length of the pull rods to fix different numbers of counterweight components.

[0006] As a further embodiment of this utility model: the connecting base plate is connected to the T-shaped base plate by bolts, and a pad is installed on the connecting base plate.

[0007] As a further embodiment of this utility model: the two ends of the front guide rod are respectively provided with an upper guide sleeve and a lower guide sleeve, wherein the upper guide sleeve is connected to the frame and the lower guide sleeve is connected to the connecting base plate.

[0008] As a further embodiment of this utility model: the counterweight kit includes a first counterweight and a second counterweight. Both the first and second counterweights are provided with protrusions, and the protrusions on the first and second counterweights are staggered. Each protrusion has a longitudinal through hole for the end of the pull rod to pass through. Both sides of the first and second counterweights have U-shaped through holes with overlapping positions. The first counterweight has a threaded mounting hole.

[0009] As a further embodiment of this utility model: a V-shaped wheel fixing seat is installed on the counterweight at the position of the threaded mounting hole, a V-shaped wheel is installed on the V-shaped wheel fixing seat, an angle steel that meshes with the V-shaped wheel is installed on the frame, and a rear guide rod located in the U-shaped through hole is also installed on the frame.

[0010] As a further embodiment of this utility model: the sprocket kit includes a fixed seat mounted on the frame and a sprocket shaft disposed on the fixed seat. An anti-rotation block is installed on the fixed seat, and a sprocket is sleeved on the outer circumferential surface of the sprocket shaft. One end of the chain is connected to a counterweight after passing over the sprocket, and the other end is connected to the front lower support plate.

[0011] As a further embodiment of this utility model: the first counterweight has a through hole for the end of the chain to pass through, and the second counterweight has a round hole. The end of the chain passes through the through hole and extends into the round hole, and is fixed by a nut to limit its position.

[0012] As a further embodiment of this utility model: the front guide rod has several through holes along its length, and the upper end of the front guide rod is provided with a front upper support plate assembly connected to it by screws. A sensor is installed on the front upper support plate assembly, and the sensor is connected to the end of the electric cylinder.

[0013] As a further embodiment of this utility model, it further includes an electrical control cabinet, which is electrically connected to the sensor.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This application utilizes multiple adjustable counterweight kits that work in conjunction with tie rods to flexibly adjust the load according to the thrust requirements of different servo electric cylinders. The counterweight adjustment range is wide, covering various working conditions. Furthermore, the test bench's structural design prioritizes compatibility, facilitating the installation of electric cylinders of different specifications and strokes, thus enhancing the equipment's applicability and versatility. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the servo electric cylinder durability testing device of this utility model; Figure 2 This is a side view of the frame of this utility model; Figure 3 This is a top view of the frame of this utility model; Figure 4 This is a schematic diagram of the internal structure of the frame of this utility model; Figure 5 This is a schematic diagram of the framework of this utility model; Figure 6 This is a schematic diagram of the front upper support plate assembly of this utility model; Figure 7 This is a schematic diagram of the counterweight of this utility model; Figure 8 This is a schematic diagram of the second counterweight of this utility model; In the diagram: 1. T-shaped base plate; 2. Connecting base plate; 3. Counterweight assembly; 301. Counterweight block one; 302. Counterweight block two; 303. Protrusion; 304. Through hole; 305. U-shaped through hole; 306. Threaded mounting hole; 307. Through hole; 308. Round hole; 4. V-shaped wheel; 5. Frame; 6. Front lower support plate; 7. Chain; 8. Front guide rod; 9. Sprocket shaft; 10. Fixing seat; 11. Pressure plate; 12. Longitudinal... 13. Front upper support plate assembly; 131. Upper support plate; 132. Longitudinal connecting plate; 133. Transverse connecting plate; 14. Angle steel; 15. Rear guide rod; 16. Electric cylinder; 17. Trunnion fixing seat; 18. Tooling base plate; 19. Tie rod; 20. V-wheel fixing seat; 21. Lower guide sleeve; 22. Pad block; 23. Fixing plate; 24. Anti-rotation block; 25. Sprocket; 26. Upper guide sleeve; 27. Electrical control cabinet. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-8 In this embodiment of the utility model, a servo electric cylinder durability testing device includes: A frame 5, on which a connecting base plate 2 is installed; Specifically, frame 5 is a steel structure frame with a diagonal bracing structure. The top of frame 5 is the main load-bearing area, and a fixing plate 23 is installed at the bottom of frame 5 to ensure its overall strength and prevent deformation after long-term use. The bottom of frame 5 is connected to the top of the connecting base plate 2 to provide stable support for frame 5.

[0018] Multiple front guide rods 8, the ends of which are connected to the frame 5; Specifically, the number of front guide rods 8 is not limited. In this embodiment, preferably, there are two front guide rods 8, which are arranged side by side on the connecting base plate 2, and the two front guide rods 8 are parallel to each other.

[0019] The front lower support plate 6 can move along the length direction of multiple front guide rods 8. The front lower support plate 6 is provided with a trunnion fixing seat 17 for fixing the end of the electric cylinder 16. Specifically, the lower front support plate 6 is sleeved on the outer periphery of the two front guide rods 8, and can move up and down along the length of the two front guide rods 8 to adapt to the stroke of different models of electric cylinders 16. A tooling base plate 18 is fixedly installed on the lower front support plate 6, and a trunnion fixing seat 17 is installed on the tooling base plate 18. The trunnion fixing seat 17 is connected to the trunnion at the end of the electric cylinder 16 to fix the electric cylinder 16.

[0020] A sprocket assembly, mounted on frame 5, includes a chain 7, one end of which is connected to the front lower support plate 6. Furthermore, two sets of sprocket assemblies are provided, both fixedly mounted on the top of frame 5. Multiple sets of counterweight kits 3 are set on the connecting base plate 2 and connected to the other end of the chain 7. The connecting base plate 2 is also provided with multiple sets of pull rods 19 with their ends passing through the multiple sets of counterweight kits 3. Limiting blocks are installed at the ends of the multiple sets of pull rods 19 to limit the position of the multiple sets of counterweight kits 3. The limiting blocks can be adjusted along the length of the pull rods 19 to fix different numbers of counterweight kits 3.

[0021] Specifically, the lower ends of multiple sets of pull rods 19 are in contact with the connecting base plate 2, and the lower end of the pull rod 19 is provided with a protrusion block. This protrusion block can support multiple sets of counterweight kits 3 and prevent them from falling off the lower end of the pull rod 19. The outer circumferential surface of the pull rod 19 is provided with external threads, and the limiting block is specifically a threaded sleeve. This threaded sleeve is adapted to the external threads on the pull rod 19 and can be adjusted along the pull rod 19 to adapt to different numbers of counterweight kits 3 and achieve effective limiting.

[0022] Through the above technical solution, the experimental device is equipped with multiple sets of tie rods 19 that can assemble multiple sets of counterweight kits 3, which can flexibly adjust the load according to the thrust requirements of different electric cylinders 16, and the counterweight adjustment range is large, so that the experimental platform can cover a variety of working conditions.

[0023] Please see Figure 1 In one embodiment, preferably, the connecting base plate 2 is connected to the T-shaped base plate 1 by bolts, and a pad 22 is installed on the connecting base plate 2. Further, the pad 22 is made of rubber, forming a certain gap between the connecting base plate 2 and the counterweight assembly 3, wherein the counterweight assembly 3 does not contact the pull rod 19. On the one hand, this facilitates the installation of the bottom nut of the pull rod 19 by the staff, and on the other hand, it can better protect the connecting base plate 2 and reduce the noise made when the counterweight assembly 3 falls. In addition, the setting of the T-shaped base plate 1 can ensure that the experimental device will not tilt during use. The T-shaped base plate 1 can be fixed to the ground by screws.

[0024] Please see Figure 1 In one embodiment, preferably, the two ends of the front guide rod 8 are respectively provided with an upper guide sleeve 26 and a lower guide sleeve 21, wherein the upper guide sleeve 26 is connected to the frame 5 and the lower guide sleeve 21 is connected to the connecting base plate 2. Further, the two ends of the front guide rod 8 are respectively inserted into the interior of the upper guide sleeve 26 and the lower guide sleeve 21, and then the upper guide sleeve 26 and the lower guide sleeve 21 are fixed to the frame 5 and the connecting base plate 2 respectively by bolts, thereby fixing the positions of the two front guide rods 8.

[0025] Please see Figure 1 In one embodiment, preferably, the counterweight kit 3 includes a first counterweight block 301 and a second counterweight block 302. Both the first counterweight block 301 and the second counterweight block 302 are provided with protrusions 303, and the protrusions 303 are integrally formed with the first counterweight block 301 and the second counterweight block 302 respectively. The protrusions 303 on the first counterweight block 301 and the second counterweight block 302 are staggered. Each protrusion 303 is provided with a longitudinal through hole 304 for the end of the pull rod 19 to pass through. Both sides of the first counterweight block 301 and the second counterweight block 302 are provided with U-shaped through holes 305 that overlap in position. The first counterweight block 301 is provided with a threaded mounting hole 306.

[0026] Specifically, the side of counterweight 301 has four protrusions 303, and counterweight 302 also has four protrusions 303. The four protrusions 303 of counterweight 301 and the four protrusions 303 of counterweight 302 are staggered, and each of the eight protrusions 303 has a through hole 304. A pull rod 19 is inserted into each through hole 304. Multiple sets of counterweight blocks 301 and 302 are connected in series by a pull rod 19, and nuts are tightened at both ends of the pull rod 19 to form a stable whole for the entire counterweight assembly 3. Thus, the end of the chain 7 only needs to be connected to the uppermost counterweight block 301 to drive all the counterweight blocks to rise and fall synchronously. When the counterweight needs to be replaced, a pull rod 19 of different length can be used depending on the weight of the counterweight. Because the protrusions 303 on counterweight blocks 301 and 302 are arranged in an alternating manner, gaps are left between adjacent counterweight blocks 301 or adjacent counterweight blocks 302. These gaps provide space for the installation and operation of the nuts at the lower end of the pull rod 19. Ample space facilitates assembly and disassembly, improving maintenance efficiency. Two symmetrically arranged rear guide rods 15 are installed on the frame 5, located on both sides of the counterweight assembly 3, and inserted into the U-shaped through holes 305 on the first counterweight block 301 and the second counterweight block 302. On the one hand, they provide lateral constraints during the lifting and lowering of the counterweight assembly 3, improving the stability of the movement. On the other hand, after adjusting the counterweight, a portion of the counterweight assembly 3 is constrained by the rear guide rods 15 to prevent forward or backward or left or right displacement due to vibration or other reasons. In addition, the first counterweight block 301 is provided with threaded mounting holes 306, which can be used to fix the V-shaped wheel fixing seat 20 to achieve its positioning and installation.

[0027] Please see Figure 1 In one embodiment, preferably, a V-shaped wheel fixing seat 20 is installed on the counterweight 301 at the position of the threaded mounting hole 306. A V-shaped wheel 4 is installed on the V-shaped wheel fixing seat 20. An angle steel 14 that meshes with the V-shaped wheel 4 is installed on the frame 5. A rear guide rod 15 located in the U-shaped through hole 305 is also installed on the frame 5. Furthermore, the V-shaped wheel fixing seat 20 is connected to the counterweight 301 by screws. The V-shaped wheel 4 is fixedly installed on the V-shaped wheel fixing seat 20. With the cooperation of the V-shaped wheel 4 and the angle steel 14, the counterweight assembly 3 is effectively constrained during the up and down movement, which significantly improves the stability and force balance of the movement process, thereby avoiding structural damage or test errors caused by off-center loading.

[0028] Please see Figure 1 In one embodiment, preferably, the sprocket assembly includes a fixed seat 10 mounted on the frame 5 and a sprocket shaft 9 disposed on the fixed seat 10. An anti-rotation block 24 is installed on the fixed seat 10, and a sprocket 25 is sleeved on the outer circumferential surface of the sprocket shaft 9. One end of the chain 7 is connected to a counterweight block 301 after passing around the sprocket 25, and the other end is connected to the front lower support plate 6.

[0029] Specifically, the sprocket assembly is fixed to the top of the frame 5 by the longitudinal beam 12. Both ends of the sprocket shaft 9 are milled to form a flat position. The fixing seat 10 is composed of two detachable upper and lower sections. The upper and lower sections together form a limiting cavity for accommodating the end of the sprocket shaft 9. The upper and lower sections of the fixing seat 10 are connected and fastened by screws, thereby fixing and limiting the sprocket shaft 9 in the limiting cavity. The upper section of the fixing seat 10 is provided with an anti-rotation block 24. The anti-rotation block 24 keeps in contact with the milled flat area of ​​the sprocket shaft 9 to prevent the sprocket shaft 9 from rotating. The sprocket 25 is installed on the outer peripheral surface of the sprocket shaft 9 and can rotate freely around its axis. The chain 7 is a plate chain that passes around the outer peripheral surface of the sprocket 25 and performs transmission.

[0030] Please see Figure 1 In one embodiment, preferably, the first counterweight 301 has a through hole 307 for the end of the chain 7 to pass through, and the second counterweight 302 has a round hole 308. The end of the chain 7 passes through the through hole 307 and extends into the round hole 308, and is fixed by a nut to limit its position and ensure that the chain 7 is tightly connected to the first counterweight 301.

[0031] Please see Figure 1 In one embodiment, preferably, the front guide rod 8 has several adjustment holes along its length, and the upper end of the front guide rod 8 is provided with a front upper support plate assembly 13 connected to it by screws. With the cooperation of several adjustment holes and screws, the position of the front upper support plate assembly 13 can be adjusted and fixed. A pressure plate 11 is also installed on the top of the frame 5. The front upper support plate assembly 13 includes two upper support plates 131 and two longitudinal connecting plates 132 disposed between the two upper support plates 131. A transverse connecting plate 133 connected to the two upper support plates 131 is provided between the two longitudinal connecting plates 132. The spacing between the two upper support plates 131 is greater than the width of the front guide rod 8, which facilitates the smooth insertion of the front guide rod 8 between the two upper support plates 131, enabling rapid assembly and positioning. A sensor is installed on the front upper support plate assembly 13, and the sensor is connected to the end of the electric cylinder 16. The sensor is a force sensor. The assembly further includes an electric control cabinet 27, which is electrically connected to the sensor. The electric control cabinet 27 can control the electric cylinder 16 and collect the data collected by the force sensor. It can accurately collect and monitor data such as thrust, displacement, and number of cycles generated during the experiment, and can realize visualization display and data storage, which is convenient for experimental personnel to conduct subsequent analysis and performance evaluation.

[0032] The working principle and usage process of this utility model are as follows: When the electric control cabinet 27 controls the electric cylinder 16 to extend the piston rod outward, since the front upper support plate assembly 13 is fixed, the bottom of the electric cylinder pushes the front lower support plate 6 to slide down along the front guide rod 8. Since the left and right sides of the front guide rod 8 are connected to one end of the chain 7, the chain 7 will be pulled down during the downward sliding of the front lower support plate 6. Finally, the counterweight assembly 3 will be pulled up with the sprocket 25 as the fulcrum. The sprockets 25 on the left and right sides of the counterweight assembly 3 ensure that the counterweight assembly 3, which is fixed together by the pull rod 19, will not shake. The rear guide rod 15 ensures that the load not fixed by the pull rod 19 will not shift due to the vibration of the entire device.

[0033] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0034] Therefore, the above description is only a preferred embodiment of this application and is not intended to limit the scope of this application; that is, all equivalent modifications made in accordance with the scope of the claims of this application shall be within the protection scope of the claims of this application.

Claims

1. A durability testing device for a servo electric cylinder, characterized in that, include: A frame on which a connecting base plate is mounted; Multiple front guide rods, the ends of which are connected to the frame; The front lower support plate can move along the length direction of multiple front guide rods, and the front lower support plate is provided with a trunnion fixing seat for fixing the end of the electric cylinder; A sprocket assembly, mounted on the frame, having a chain on the assembly, one end of which is connected to the front lower support plate; and Multiple sets of counterweight components are mounted on a connecting base plate and connected to the other end of a chain. The connecting base plate is also provided with multiple sets of pull rods whose ends pass through the multiple sets of counterweight components, and limit blocks are installed at the ends of the multiple sets of pull rods to limit the position of the multiple sets of counterweight components. The limit blocks can be adjusted along the length of the pull rods to fix different numbers of counterweight components.

2. The servo electric cylinder durability testing device according to claim 1, characterized in that, The connecting base plate is connected to the T-shaped base plate by bolts, and a pad is installed on the connecting base plate.

3. The servo electric cylinder durability testing device according to claim 1, characterized in that, The front guide rod is provided with an upper guide sleeve and a lower guide sleeve at both ends, wherein the upper guide sleeve is connected to the frame and the lower guide sleeve is connected to the connecting base plate.

4. The servo electric cylinder durability testing device according to claim 1, characterized in that, The counterweight kit includes a first counterweight and a second counterweight. Both the first and second counterweights are provided with protrusions, and the protrusions on the first and second counterweights are staggered. Each protrusion has a longitudinal through hole for the end of the pull rod to pass through. Both the first and second counterweights have U-shaped through holes with overlapping positions on both sides. The first counterweight has a threaded mounting hole.

5. The servo electric cylinder durability testing device according to claim 4, characterized in that, The counterweight is equipped with a V-shaped wheel fixing seat at the position of the threaded mounting hole. A V-shaped wheel is installed on the V-shaped wheel fixing seat. An angle steel that meshes with the V-shaped wheel is installed on the frame. A rear guide rod located in the U-shaped through hole is also installed on the frame.

6. The servo electric cylinder durability testing device according to claim 5, characterized in that, The sprocket assembly includes a fixed base mounted on the frame and a sprocket shaft set on the fixed base. An anti-rotation block is installed on the fixed base, and a sprocket is fitted on the outer circumferential surface of the sprocket shaft. One end of the chain is connected to a counterweight after passing over the sprocket, and the other end is connected to the front lower support plate.

7. The servo electric cylinder durability testing device according to claim 6, characterized in that, The first counterweight has a through hole for the chain end to pass through, and the second counterweight has a round hole. The chain end passes through the through hole and extends into the round hole, and is fixed by a nut to limit its position.

8. The servo electric cylinder durability testing device according to claim 1, characterized in that, The front guide rod has several through holes along its length, and the upper end of the front guide rod is provided with a front upper support plate assembly connected to it by screws. A sensor is installed on the front upper support plate assembly, and the sensor is connected to the end of the electric cylinder.

9. The servo electric cylinder durability testing device according to claim 8, characterized in that, It further includes an electrical control cabinet, which is electrically connected to the sensor.

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