Thrust testing equipment for electric push rod

Abstract

The invention relates to the technical field of force value testing equipment, in particular to thrust testing equipment for an electric push rod, and the equipment comprises a frame which provides structural support for the equipment; at least one guide rail is vertically arranged on one side of the frame; the sliding assembly is installed on the guide rail and linearly moves in the direction close to or away from the bottom of the frame; the counterweight assembly is arranged on one side of the frame and is opposite to the guide rail; the transmission assembly is mounted on the frame; one end is fixedly connected with the sliding assembly, and the other end is fixedly connected with the counterweight assembly; the rear end tool base is fixed to the frame through fixing positions, a clamping block is arranged at one end of the rear end tool base and faces the sliding assembly, and a plurality of fixing positions are distributed in the length direction of the guide rail; the front-end tool base is fixedly arranged on the sliding assembly, and a fixing base is arranged at one end of the front-end tool base and faces the clamping block; the two ends of the push rod are fixed through the clamping block and the fixing base. The application range of the test equipment is effectively expanded, and the operation convenience and safety are improved.

Description

Technical Field

[0001] The invention relates to the technical field of force value testing equipment, and in particular to a thrust testing equipment for an electric push rod. Background Art

[0002] The thrust test equipment for electric linear actuators is a special device used to measure the output force of electric linear actuators. It is widely used in industrial automation, medical equipment, automobile manufacturing and other fields. As a common linear actuator, the thrust performance of electric linear actuators directly affects the operation effect and safety of the equipment. Therefore, the thrust test equipment for electric linear actuators plays an important role in product quality control, performance optimization and safety verification.

[0003] In the related technology, the existing equipment can usually only test specific models of push rods, and the test range is limited; and there are large differences in the lengths of push rods of different models, and the existing equipment is often unable to be flexibly adjusted. The tooling seat used to clamp the push rod to be tested can only be adjusted up and down to a limited extent, and cannot meet the installation requirements of push rods of different lengths, resulting in poor versatility of the test equipment; this limitation requires companies to purchase a variety of equipment when testing different models of push rods, which increases equipment costs and maintenance difficulties.

[0004] Therefore, a convenient, efficient, adaptable and safe thrust testing device for an electric push rod is needed to solve the above problems. Summary of the invention

[0005] In view of at least one of the above technical problems, the present invention provides a thrust testing device for an electric push rod, which improves the safety and convenience of operation through a counterweight assembly; and enhances the adaptability of the device through a height adjustment plate and an adjustment hole.

[0006] The present invention provides a thrust testing device for an electric push rod, comprising: Frame, which provides structural support for the equipment; A guide rail, at least one of which is vertically arranged on one side of the frame; A slide assembly is mounted on the guide rail and moves linearly toward or away from the bottom of the frame; A counterweight assembly is arranged on one side of the frame and opposite to the guide rail; The transmission assembly is installed on the frame; one end is fixedly connected to the sliding assembly, and the other end is fixedly connected to the counterweight assembly; The rear end tooling seat is fixed on the frame through a fixed position, with a clamping block at one end, and the clamping block faces the sliding assembly, and there are several fixed positions distributed along the length direction of the guide rail; The front end tooling seat is fixedly arranged on the sliding assembly, and a fixed seat is arranged at one end, and the fixed seat faces the clamping block; The clamping block and the fixing seat fix the two ends of the push rod.

[0007] In some embodiments of the present invention, the frame includes a first vertical rod installed on one side of the guide rail and fixedly connected to the guide rail; a first cross rod installed on the side of the frame away from the guide rail and at the top of the frame; the length direction of the first cross rod is perpendicular to the length direction of the first vertical rod.

[0008] In some embodiments of the present invention, the transmission assembly includes a sprocket, a connecting shaft, a transmission chain and a pull rod; There are at least two connecting shafts, one is fixedly connected to the first vertical rod, and the other is fixedly connected to the first horizontal rod, and both connecting shafts are located at the top of the frame; The sprocket teeth and the connecting shaft are installed on the connecting shaft in a one-to-one correspondence; The pull rod is fixedly connected to the sliding assembly; One end of the transmission chain is fixedly connected to the pull rod, and the other end is fixedly connected to the counterweight assembly, and power is transmitted through the chain teeth.

[0009] In some embodiments of the present invention, the frame further includes a height adjustment plate fixedly connected to the first vertical rod; the height adjustment plate is provided with a plurality of adjustment holes evenly spaced along the length direction.

[0010] In some embodiments of the present invention, the rear end tooling seat is fixedly connected to the height adjustment plate; and the rear end tooling seat is provided with a fixing hole corresponding to the adjustment hole.

[0011] In some embodiments of the present invention, the frame further comprises a counterweight support rod disposed below the first crossbar.

[0012] In some embodiments of the present invention, the weight assembly includes a plurality of weight blocks, a weight tube, a guide rod, and a latch rod; A guide rod is provided on each side of the counterweight support rod, one end of which is fixedly connected to the counterweight support rod and the other end of which is fixedly connected to the frame; A plurality of counterweight blocks are stacked and placed on the counterweight support rod along the guide rod, and a latch hole is provided on the counterweight block; The counterweight pipe passes through the counterweight block, and one end is fixedly connected to the transmission chain; The latch rod passes through the latch hole and the weight tube.

[0013] In some embodiments of the present invention, a through hole is provided on the side of the counterweight block, and the counterweight tube passes through the through hole to be fixedly connected to the transmission chain; the counterweight tube has a counterweight hole for the latch rod to pass through.

[0014] In some embodiments of the present invention, an anti-slip barrier strip is provided at the top end of the guide rod.

[0015] In some embodiments of the present invention, the sliding assembly includes a slider, a tooling connecting tube and a synchronization plate; two sliders are installed on each guide rail; the synchronization plate is fixedly connected to all the sliders; the tooling connecting tube is fixedly connected to the synchronization plate, and one side of the tooling connecting tube is fixedly connected to the transmission assembly; one side of the front end tooling seat is fixedly connected to the tooling connecting tube.

[0016] The beneficial effects of the present invention are as follows: the present invention realizes the flexible increase and decrease of the counterweight block through the design of the counterweight tube, the latch rod and the guide rod, avoids the tediousness and danger of traditional manual handling of the counterweight block, and improves the safety and convenience of operation; through the design of the height adjustment plate and the adjustment hole, the rear end tooling seat can be quickly adjusted according to push rods of different specifications, thereby enhancing the adaptability of the equipment and being able to meet the testing requirements of push rods of various models; the transmission method of the sprocket, the transmission chain and the slider is adopted, so that the thrust test of the push rod is more efficient, the test time is reduced, and the test efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 Schematic diagram of the structure of a thrust test device for an electric push rod in an embodiment of the present invention; Figure 2 It is a partial front view schematic diagram of a thrust test device for an electric push rod in an embodiment of the present invention; Figure 3 Schematic diagram of the structure of a transmission assembly in a thrust testing device for an electric push rod according to an embodiment of the present invention; Figure 4 It is a structural schematic diagram of a counterweight assembly in a thrust testing device for an electric push rod in an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a counterweight block in a thrust testing device for an electric push rod in an embodiment of the present invention; Figure 6 Schematic diagram of the structure of a sliding assembly in a thrust testing device for an electric push rod in an embodiment of the present invention.

[0019] Figure numerals: 1. frame; 11. first vertical rod; 12. first horizontal rod; 13. height adjustment plate; 13a. adjustment hole; 14. counterweight support rod; 15. support foot; 2. guide rail; 3. sliding assembly; 31. slider; 32. tooling connecting pipe; 33. synchronization plate; 4. counterweight assembly; 41. counterweight block; 41a. latch hole; 41b. through hole; 42. counterweight tube; 42a. counterweight hole; 43. guide rod; 43a. anti-slip strip; 44. latch rod; 5. transmission assembly; 51. sprocket; 52. connecting shaft; 53. transmission chain; 54. pull rod; 6. rear end tooling seat; 61. clamping block; 62. fixing hole; 7. front end tooling seat; 71. fixing seat. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0023] like Figures 1 to 6 The thrust test equipment for electric actuators shown includes: The frame 1 provides structural support for the device; preferably, the frame 1 can be formed of a rectangular bottom and top composed of two groups of four rods, and a vertical rod is set at each of the four corners to form a rectangular frame 1, and subsequent parts can be placed in this rectangular frame 1; A guide rail 2, at least one of which is vertically arranged on one side of the frame 1, for guiding the linear motion of the sliding assembly 3; The sliding assembly 3 is mounted on the guide rail 2 and moves linearly toward or away from the bottom of the frame 1, ensuring that the push rod can output thrust along a preset path during the test, avoiding unnecessary lateral or rotational movement; The counterweight assembly 4 is arranged on one side of the frame 1 and opposite to the guide rail 2; different load conditions are simulated by adding or removing the counterweight block 41, so that the thrust performance of the push rod under different loads can be accurately tested; The transmission assembly 5 is mounted on the frame 1; one end is fixedly connected to the sliding assembly 3, and the other end is fixedly connected to the counterweight assembly 4; The rear end fixture seat 6 is fixed on the frame 1 through a fixed position, and has a clamping block 61 at one end, and the clamping block 61 faces the sliding assembly 3, and there are several fixed positions distributed along the length direction of the guide rail 2; such a design can adjust the position of the rear end fixture seat 6 relative to the front end fixture seat 7, so as to better clamp the handles of the push rods to be tested of different specifications; The front end tooling seat 7 is fixedly arranged on the sliding assembly 3, and a fixing seat 71 is provided at one end thereof, and the fixing seat 71 faces the clamping block 61; and is used for clamping one end of the piston rod of the push rod to be tested.

[0024] The working principle of the present invention is based on the coordinated work of the mechanical transmission and the counterweight system. By simulating the load conditions of the push rod in actual work, its thrust performance is measured. The specific working principle is as follows: Before starting the equipment, the frame 1 is firmly placed on the ground by the four supporting feet at the bottom to ensure that the equipment will not shake or tilt during the test; the electric push rod to be tested is installed between the front-end tooling seat 7 and the rear-end tooling seat 6, and the rear-end tooling seat 6 can use one of several fixed positions according to the specifications of the push rod to be tested, that is, the different adjustment holes 13a on the height adjustment plate 13 are used to adjust the position to make it suitable for the length of the push rod to be tested, and then the clamping block 61 on the rear-end tooling seat 6 is used to clamp the handle of the push rod to be tested, and the fixed seat 71 of the front-end tooling seat 7 fixes one end of the piston rod of the push rod to be tested.

[0025] According to the test requirements, after selecting an appropriate number of counterweight blocks 41, count the counterweight blocks 41 of this number from top to bottom in the counterweight assembly 4, and the operator inserts the pin rod 44 in the counterweight assembly 4 into the pin hole 41a of the last counterweight block 41 in the appropriate number and the counterweight hole 42a of the counterweight tube 42 to adjust the counterweight weight. By using the guide rod 43 to limit the moving range of the counterweight block 41, ensure that multiple counterweight blocks 41 are firmly stacked together; one end of the counterweight tube 42 in the counterweight assembly 4 is connected to the transmission chain 53, and the other end passes through the through hole 41b of the counterweight block 41, ensuring that the weight of the counterweight block 41 can be transferred to the sliding assembly 3 through the transmission chain 53.

[0026] The connecting shaft 52 in the transmission assembly 5 is installed at the top of the frame 1, and the sprocket 51 is fixed on the connecting shaft 52; one end of the transmission chain 53 is connected to the counterweight tube 42, and the other end transmits power through the sprocket 51, and is finally connected to the front pull rod 54 of the sliding assembly 3; when the electric push rod to be tested starts to work, the piston rod of the push rod pushes the movement of the front end tooling seat 7. At this time, the thrust of the push rod is transmitted to the tooling connecting tube 32 in the sliding assembly 3 through the front end tooling seat 7, driving the slider 31 to move synchronously on the guide rail 2, so that the pull rod 54 starts to move, and the sliding assembly 3 is connected to the transmission chain 53 through the pull rod 54, and the transmission chain 53 transmits the thrust of the push rod to the counterweight assembly 4, and finally drives the counterweight block 41 to rise or fall.

[0027] When the thrust of the push rod is balanced with the weight of the counterweight 41, the thrust of the push rod is the total weight of the counterweight 41; by increasing or decreasing the number of counterweights 41, the thrust performance of the push rod to be tested can be obtained by measuring various parameters of the push rod under different loads; the thrust performance data of the push rod can also be recorded according to the number of counterweights 41 of the counterweight assembly 4 and the thrust balance of the push rod; through multiple tests, the thrust curve of the push rod under different loads can be obtained, providing data support for product performance optimization and quality control; when the push rod completes the thrust test, the operator disconnects the power supply of the push rod and removes the push rod.

[0028] The frame 1 includes a first vertical rod 11, which is installed on one side of the guide rail 2 and is fixedly connected to the guide rail 2 to support and fix the guide rail 2, ensuring the vertical installation of the guide rail 2, so that the sliding component 3 can smoothly move up and down along the guide rail 2, avoiding the shaking or deviation of the guide rail 2; the first cross bar 12 is installed on the side of the frame 1 away from the guide rail 2 and is at the top of the frame 1, playing a role of lateral support and connection; the length direction of the first cross bar 12 is perpendicular to the length direction of the first vertical rod 11, which enhances the overall rigidity of the frame 1 and provides an installation position for the transmission component 5 such as the connecting shaft 52, ensuring that the transmission component 5 can work stably and transmit the thrust of the push rod to the counterweight component 4.

[0029] In some embodiments of the present invention, the transmission assembly 5 includes a sprocket 51, a connecting shaft 52, a transmission chain 53 and a pull rod 54; there are at least two connecting shafts 52, one is fixedly connected to the first vertical rod 11, and the other is fixedly connected to the first cross bar 12, and the connecting shafts 52 are both located at the top of the frame 1, used to fix the sprocket 51, and serve as a support point for the transmission chain 53; the sprocket 51 and the connecting shaft 52 are installed on the connecting shaft 52 in a one-to-one correspondence, and are used to engage with the transmission chain 53 to transmit power; the pull rod 54 is fixedly connected to the sliding assembly 3; one end of the transmission chain 53 is fixedly connected to the pull rod 54, and the other end is fixedly connected to the counterweight assembly 4, and power is transmitted through the sprocket 51; The design of the sprocket 51 and the transmission chain 53 makes power transmission smoother, reduces energy loss and improves transmission efficiency; the transmission assembly 5 transmits the up and down movement of the sliding assembly 3 to the counterweight assembly 4 through the engagement of the sprocket 51 and the transmission chain 53, so that the thrust of the push rod can be balanced with the weight of the counterweight block 41.

[0030] In some embodiments of the present invention, the frame 1 also includes a height adjustment plate 13, which is fixedly connected to the first vertical rod 11 and is used to adjust the height of the rear end tooling seat 6 to adapt to the testing requirements of push rods of different specifications and models; the height adjustment plate 13 is evenly spaced along the length direction to open a plurality of adjustment holes 13a, that is, a plurality of fixed positions. The adjustment holes 13a in the present invention are only a specific form of expression of the fixed positions, and the adjustment slots and other methods can also be used to replace the adjustment holes 13a to adjust the position; the rear end tooling seat 6 can be adjusted up and down through these adjustment holes 13a to adapt to the testing requirements of push rods of different specifications and models; and the adjustment holes 13a of the height adjustment plate 13 are designed to make the height adjustment of the rear end tooling seat 6 more convenient. The operator only needs to fix the rear end tooling seat 6 on the appropriate adjustment hole 13a, without the need for a complicated adjustment process, thereby simplifying the operation process, reducing the preparation time before the test, and improving the test efficiency.

[0031] The rear end tooling seat 6 is fixedly connected to the height adjustment plate 13, and can be adjusted up and down according to the specifications of the push rod to ensure that the installation position of the push rod is accurate. The rear end tooling seat 6 is used to fix the handle of the push rod to ensure that the push rod remains stable during the test and avoids displacement or shaking of the push rod during the test; the rear end tooling seat 6 is provided with a fixing hole 62 corresponding to the adjustment hole 13a, ensuring the stable and convenient installation of the rear end tooling seat 6, and the position of the rear end tooling seat 6 can be adjusted at any time according to the specifications of the push rod.

[0032] The frame 1 also includes a counterweight support rod 14, which is arranged below the first cross bar 12 to strengthen the support structure of the frame 1 and is used to support and fix the counterweight assembly 4, so that the counterweight assembly 4 and the transmission chain 53 in the transmission assembly 5 are on the same side of the frame 1 and can be better connected. When the transmission chain 53 drives the counterweight assembly 4, no complicated transmission path is required, ensuring that the counterweight assembly 4 can work stably during the test.

[0033] Preferably, the counterweight assembly 4 includes a plurality of counterweight blocks 41, a counterweight tube 42, a guide rod 43 and a latch rod 44; a guide rod 43 is provided on each side of the counterweight support rod 14, one end of which is fixedly connected to the counterweight support rod 14, and the other end is fixedly connected to the frame 1, thereby ensuring that the counterweight block 41 does not shake or deviate during the test, thereby improving the stability of the test; a plurality of counterweight blocks 41 are stacked and placed on the counterweight support rod 14 along the guide rod 43, and a latch hole 41a is provided in the counterweight block 41. The number of counterweight blocks 41 can be increased or decreased by inserting the latch rod 44 into the latch holes 41a on different counterweight blocks 41, so as to flexibly Actively adjust the load of the push rod to be tested, simulate the load conditions of the push rod in actual work, and ensure that the thrust performance of the push rod under different loads is accurately tested; the counterweight tube 42 passes through the counterweight block 41, and one end is fixedly connected to the transmission chain 53. The counterweight tube 42 can also be in the form of a counterweight plate, a counterweight pull rod, etc., and the counterweight tube is used to describe it specifically in the present invention; the pin rod 44 passes through the pin hole 41a and the counterweight tube 42; the design of the counterweight assembly 4 makes load adjustment more convenient, reduces the preparation time before testing, and improves testing efficiency; ensures the reliability of the equipment during the test and reduces the possibility of failure.

[0034] In some embodiments of the present invention, a through hole 41b is provided on the side of the counterweight block 41, and the counterweight tube 42 passes through the through hole 41b and is fixedly connected to the transmission chain 53; the counterweight tube 42 is provided with a counterweight hole 42a for the latch rod 44 to pass through; this design allows the counterweight tube 42 to extend into the counterweight hole 42a through the latch rod 44, and different numbers of counterweight blocks 41 can be selected to move synchronously with the counterweight tube 42, thereby achieving the effect of conveniently adjusting the counterweight weight borne by the push rod to be tested, thereby improving the test efficiency.

[0035] On the basis of the above embodiment, an anti-detachment bar 43a is provided at the top of the guide rod 43, which can be fixed to the guide rod 43 by a threaded connection; the anti-detachment bar 43a limits the movement range of the counterweight block 41, ensuring that the counterweight block 41 always moves stably along the guide rod 43 during the test; it prevents the counterweight block 41 from detaching from the guide rod 43 from the upper end of the frame 1 during the test under the drive of the counterweight tube 42, avoids the counterweight block 41 from colliding or rubbing with other parts of the equipment, reduces equipment wear, and extends the service life of the equipment.

[0036] In some embodiments of the present invention, the sliding assembly 3 includes a slider 31, a tooling connecting tube 32 and a synchronization plate 33; two sliders 31 are installed on each guide rail 2 to prevent movement deviation caused by the sliding of each slider 31, and also avoid the possibility that the entire equipment will be directly shut down when a slider 31 has a problem; the synchronization plate 33 is fixedly connected to all sliders 31 to ensure that multiple sliders 31 can move synchronously; the tooling connecting tube 32 is fixedly connected to the synchronization plate 33, and one side of the tooling connecting tube 32 is fixedly connected to the transmission assembly 5; one side of the front tooling seat 7 is fixedly connected to the tooling connecting tube 32; the sliding assembly 3 ensures that the push rod can output thrust according to a preset path during the test through the movement of the slider 31 on the guide rail 2, and the design of using two sliders 31 and fixing them through the slide rail connecting plate has many advantages such as improving stability, enhancing load capacity, improving movement accuracy, and extending equipment life.

[0037] Preferably, four evenly distributed support feet can be provided at the bottom of the frame 1. When encountering an unstable ground, the height of one position can be adjusted by the support feet to make the entire device flat. In this way, the weight of the entire device can be evenly transferred to the ground during the test, making the test more stable.

[0038] On the basis of some of the above embodiments, it is preferred that two guide rails 2 are provided so as to be located on the same side of the frame 1; thus, the sliding assembly 3 will include a total of four sliders 31, two sliders 31 are installed on each guide rail 2, and the synchronization plate 33 synchronously drives the four sliders 31 to slide on the two guide rails 2, so that the test is more stable, the direction is less likely to deviate, and when a single slider 31 has a problem, the overall test is greatly affected, and a certain safety reaction time is reserved; the transmission assembly 5 will also be provided with a group on each side of the two guide rails 2, so that Power is transmitted to both ends of the tooling connecting tube 32 in the sliding assembly 3 at the same time. Compared with the transmission of a single transmission chain 53 and a pull rod 54, the power transmission route is more stable, the transmission efficiency is improved, and the possibility of the tooling connecting tube 32 tilting in the horizontal direction is avoided; at this time, two counterweight tubes 42 are also set in the counterweight assembly 4, which pass through all the counterweight blocks 41 from high to low from both sides of the stacked counterweight blocks 41, and two latch rods 44 are also placed, so that multiple counterweight blocks 41 can be moved simultaneously from both ends, making the rise or fall of the counterweight blocks 41 more stable.

[0039] Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A thrust test device for an electric push rod, characterized in that: include: A frame (1), providing structural support for the device; A guide rail (2), at least one of which is vertically arranged on one side of the frame (1); A sliding assembly (3) is mounted on the guide rail (2) and moves linearly toward or away from the bottom of the frame (1); A counterweight assembly (4) is arranged on one side of the frame (1) and is opposite to the guide rail (2); A transmission assembly (5) is mounted on the frame (1); one end of the transmission assembly (5) is fixedly connected to the sliding assembly (3), and the other end of the transmission assembly (5) is fixedly connected to the counterweight assembly (4); A rear end tooling seat (6) is fixed on the frame (1) via a fixed position, one end of which is provided with a clamping block (61), and the clamping block (61) faces the sliding assembly (3), and a plurality of the fixed positions are distributed along the length direction of the guide rail (2); A front end tooling seat (7) is fixedly arranged on the sliding assembly (3), and a fixing seat (71) is provided at one end, and the fixing seat (71) faces the clamping block (61); The clamping block (61) and the fixing seat (71) fix the two ends of the push rod.

2. The thrust testing device for an electric push rod according to claim 1, characterized in that: The frame (1) comprises a first vertical rod (11) installed on one side of the guide rail (2) and fixedly connected to the guide rail (2); a first cross rod (12) installed on a side of the frame (1) away from the guide rail (2) and located at the top of the frame (1); the length direction of the first cross rod (12) is perpendicular to the length direction of the first vertical rod (11).

3. The thrust testing device for an electric push rod according to claim 2, characterized in that: The transmission assembly (5) comprises a sprocket (51), a connecting shaft (52), a transmission chain (53) and a pull rod (54); There are at least two connecting shafts (52), one fixedly connected to the first vertical rod (11), and one fixedly connected to the first horizontal rod (12), and the connecting shafts (52) are both located at the top of the frame (1); The sprockets (51) and the connecting shafts (52) are mounted on the connecting shafts (52) in a one-to-one correspondence; The pull rod (54) is fixedly connected to the sliding assembly (3); One end of the transmission chain (53) is fixedly connected to the pull rod (54), and the other end is fixedly connected to the counterweight assembly (4), and power is transmitted through the chain teeth (51).

4. The thrust testing device for an electric push rod according to claim 2, characterized in that: The frame (1) further comprises a height adjustment plate (13) fixedly connected to the first vertical rod (11); the height adjustment plate (13) is provided with a plurality of adjustment holes (13a) evenly spaced along the length direction.

5. The thrust testing device for an electric push rod according to claim 4, characterized in that: The rear end tooling seat (6) is fixedly connected to the height adjustment plate (13); the rear end tooling seat (6) is provided with a fixing hole (62) corresponding to the adjustment hole (13a).

6. The thrust testing device for an electric push rod according to claim 2, characterized in that: The frame (1) also includes a counterweight support rod (14) arranged below the first crossbar (12).

7. The thrust testing device for an electric push rod according to claim 6, characterized in that: The counterweight assembly (4) comprises a plurality of counterweight blocks (41), a counterweight tube (42), a guide rod (43) and a latch rod (44); The guide rod (43) is provided at each side of the counterweight support rod (14), one end of which is fixedly connected to the counterweight support rod (14) and the other end of which is fixedly connected to the frame (1); The plurality of counterweight blocks (41) are stacked and placed on the counterweight support rod (14) along the guide rod (43), and the counterweight blocks (41) are provided with pin holes (41a); The counterweight tube (42) passes through the counterweight block (41), and one end is fixedly connected to the transmission chain (53); The latch rod (44) passes through the latch hole (41a) and the counterweight tube (42).

8. The thrust testing device for an electric push rod according to claim 7, characterized in that: A through hole (41b) is provided on the side of the counterweight block (41), and the counterweight tube (42) passes through the through hole (41b) and is fixedly connected to the transmission chain (53); the counterweight tube (42) is provided with a counterweight hole (42a) for the latch rod (44) to pass through.

9. The thrust testing device for an electric push rod according to claim 7, characterized in that: The top end of the guide rod (43) is provided with an anti-slip blocking strip (43a).

10. The thrust testing device for an electric push rod according to claim 1, characterized in that: The sliding assembly (3) comprises a slider (31), a tooling connection pipe (32) and a synchronization plate (33); two sliders (31) are installed on each guide rail (2); the synchronization plate (33) is fixedly connected to all the sliders (31); the tooling connection pipe (32) is fixedly connected to the synchronization plate (33), and one side of the tooling connection pipe (32) is fixedly connected to the transmission assembly (5); one side of the front tooling seat (7) is fixedly connected to the tooling connection pipe (32).

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