Fatigue test equipment for electric push rod

Abstract

The invention relates to the technical field of fatigue test equipment, in particular to fatigue test equipment for an electric push rod, which comprises a first support group, the second supporting group is fixedly arranged at one end of the first supporting group; the third supporting set comprises a load assembly fixedly arranged on the first supporting set and comprises a transmission structure rotationally connected with the third supporting set and a load rod rotationally connected with the transmission structure, and the load rod extends from one side of the second supporting set to the other side of the second supporting set in the length direction of the first supporting set. The connecting plate is rotationally connected with the transmission structure, one end of the connecting plate is fixedly connected with the load rod, the other end of the connecting plate clamps the push rod to be tested through adjusting positions, and a plurality of adjusting positions are uniformly arranged on the connecting plate; the tool base is installed on the first supporting set and located on the side away from the second supporting set. In a working state, the tool seat clamps a rod handle of a to-be-tested push rod, and one end of a piston rod of the to-be-tested push rod is connected with the connecting plate. The stability and flexibility of the test equipment are effectively improved, and the test equipment is adaptive to push rods of different specifications and models.

Description

Technical Field

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

[0002] As a key component in many mechanical equipment, the fatigue test of the performance of the electric linear actuator in long-term operation is of great significance to the safety and reliability of the equipment; the fatigue test of the electric linear actuator usually simulates its actual load and environmental conditions under working conditions, which can effectively evaluate its durability under high-intensity work; in order to accurately test the fatigue performance of the electric linear actuator, special testing equipment is required, which usually involves multiple cycle tests of the electric linear actuator under different loads.

[0003] In the prior art, fatigue testing equipment for electric push rods is often relatively simple in terms of adjustment structure, usually adopting a fixed structure, unable to provide multi-angle and multi-directional precise adjustment, difficult to adapt to push rods of different sizes and shapes, unable to flexibly adjust the test angle and load position during testing, resulting in the accuracy and reliability of the test results being affected, and the operation being cumbersome and inefficient. Therefore, there is an urgent need for a fatigue testing equipment for electric push rods with a more stable structure, more precise load control, and wider applicability to meet the high requirements of modern industry for push rod testing. Summary of the invention

[0004] The invention provides a fatigue testing device for an electric push rod, which can effectively improve the stability and flexibility of the fatigue test.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: It includes: a first support group; A second support group is fixedly installed at one end of the first support group; A third support group is fixedly installed on the first support group; A load assembly, comprising a transmission structure fixedly connected to the third support group, a load rod rotatably connected to the transmission structure, and the load rod extends from one side of the second support group to the other side along the length direction of the first support group; A connecting plate is rotatably connected to the transmission structure, one end of which is fixedly connected to the load rod, and the other end of which clamps the push rod to be tested by adjusting the position, and the adjustment position is evenly set on the connecting plate. A tooling seat is installed on the first support group and is located at a side away from the second support group; In the working state, the tooling seat clamps the handle of the push rod to be tested, and one end of the piston rod of the push rod to be tested is connected to the connecting plate.

[0006] Furthermore, the transmission structure includes a transmission shaft and a bearing seat; a bearing seat is arranged on each side of the load rod, and the bearing holes are relatively oriented; the bearing seat is fixedly connected to the third support group; and the transmission shaft is rotatably connected to the bearing seat.

[0007] Furthermore, one end of the load rod is recessed inwards to form an arc-shaped profile, and the transmission shaft is embedded in this end.

[0008] Furthermore, the connecting plate includes a first plate and a second plate, the second plate is vertically connected to the first plate, and a through hole is provided at the contact point, and the transmission shaft passes through the through hole; the first plate is fixedly connected to the load rod.

[0009] Furthermore, a connecting plate is provided on each side of the load rod; and a plurality of gear holes are provided on the second plate at intervals.

[0010] Furthermore, the first support group also includes a positioning beam extending from one end to the other end along the length direction of the first support group; the positioning beam is provided with a plurality of positioning holes at intervals along the length direction.

[0011] Furthermore, one side of the tooling seat is recessed inward to form a clamping cavity, and the opening of the clamping cavity faces the second support group; the tooling seat is provided with a fixing hole that is compatible with the positioning hole.

[0012] Furthermore, a third support group is respectively arranged on both sides of the first support group, and the third support group includes a support beam, a support tube and a support seat; the support beam is vertically fixed on the first support group; the support tube is perpendicular to the support beam and fixed at one end of the support beam away from the first support group; the support seat is fixed on the support tube; and the transmission structure is fixed on the support seat.

[0013] Furthermore, the third support group also includes a support oblique tube, one of which is installed on each side of the support beam; one end of the support oblique tube is fixedly connected to the support tube, and the other end is fixedly connected to the first support group.

[0014] Furthermore, the second support group includes support vertical poles, two of which are vertically installed at one end of the first support group; and a horizontal support cross bar is installed between the two support vertical poles.

[0015] The technical solution of the present invention can achieve the following technical effects: The present invention effectively shares the load generated during the test through multiple support group structures, thereby enhancing the stability of the test; by controlling the application and adjustment of the load and the selection of the position of the tooling seat, it can adapt to the fatigue test of push rods of different specifications and sizes, providing greater flexibility; through the rotation of the connecting plate on the transmission shaft, the effect of repeatedly running the push rod to be tested within the same range to test the fatigue performance is achieved, which improves the convenience of detection and saves test space. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 It is a structural schematic diagram of a fatigue testing device for an electric push rod in the present invention; Figure 2 For the present invention Figure 1 A is an enlarged schematic diagram; Figure 3 It is a structural schematic diagram of a connecting plate in a fatigue testing device for an electric push rod in the present invention; Figure 4 For the present invention Figure 1 An enlarged schematic diagram of the tooling seat at position B in FIG. Figure 5 It is a structural schematic diagram of the third supporting assembly in the fatigue testing equipment for the electric push rod in the present invention; Figure 6 It is a structural schematic diagram of the second supporting assembly in the fatigue testing equipment for the electric push rod in the present invention; Figure numerals: 1. first support group; 11. positioning beam; 11a. positioning hole; 2. second support group; 21. support vertical rod; 22. support horizontal rod; 3. third support group; 31. support beam; 32. support tube; 33. support seat; 34. support inclined tube; 4. load assembly; 41. transmission structure; 41a. transmission shaft; 41b. bearing seat; 42. load rod; 5. connecting plate; 51. first plate; 52. second plate; 52a. gear hole; 53. through hole; 6. tooling seat; 61. clamping cavity; 62. fixing hole. DETAILED DESCRIPTION

[0018] 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.

[0019] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] A fatigue testing device for electric actuators, such as Figures 1 to 6 As shown, including: The first support group 1; the first support group 1 can be formed of a rectangular frame with two long and two short support beams 31 in total, and another support beam 31 can be installed in the middle of the long support beam 31 to stabilize the entire frame, so that the anti-bending and anti-deformation capabilities of the entire support group are enhanced; in some embodiments of the present invention, support feet can be set at the bottom of the first support group 1 to ensure that the device is firmly placed on the ground during the test, avoid sliding or tilting of the device, and keep the device in a horizontal state; The second support group 2 is fixedly installed at one end of the first support group 1; The third support group 3 is fixedly set on the first support group 1; The load assembly 4 comprises a transmission structure 41 fixedly connected to the third support group 3, and a load rod 42 rotatably connected to the transmission structure 41, wherein the load rod 42 extends from one side of the second support group 2 to the other side along the length direction of the first support group 1; preferably, a rectangular hole can be provided at one end of the load rod 42 away from the transmission structure 41, and a load hanging rod is passed through and placed therein, so that the center of the load hanging rod coincides with the load rod 42, for hanging load objects, so as to achieve the effect of uniformly applying force to the push rod; The connecting plate 5 is rotatably connected to the transmission structure 41, one end of which is fixedly connected to the load rod 42, and the other end of which clamps the push rod to be tested by adjusting the position, and the adjustment position is evenly arranged on the connecting plate; the connecting plate 5 is used to transfer the gravity of the load-bearing object on the load rod 42 to the push rod to be tested; in the present invention, the load-bearing object can be a load-bearing sandbag, which is more common and convenient to operate; A tooling seat 6 is installed on the first support group 1 and is located at a side away from the second support group 2, and is used to clamp the push rod to be tested; The working principle of the present invention is as follows: Hang the weighted sandbags of the test weight on both sides of the load hanging rod, and move the tooling seat 6 to the corresponding position of the positioning beam 11 on the first support group 1 according to the specifications of the push rod to be tested; the tooling seat 6 clamps the handle of the push rod to be tested, and one end of the piston rod of the push rod to be tested is connected to the gear hole 52a on the connecting plate 5 according to the load requirements of the test, to ensure that the push rod will not be displaced or slipped during the test; Fatigue test starts when power is turned on. Because the first plate 51 of the connecting plate 5 is fixedly connected to the load rod 42, the gravity of the weighted sandbag is transmitted to the first plate 51 of the connecting plate 5 through the load rod 42. Since the load rod 42 and the connecting plate 5 are rotating relative to the transmission shaft 41a in the transmission structure 41, the gravity is transmitted to the second plate 52 of the connecting plate 5. At this time, the piston rod of the push rod to be tested performs continuous reciprocating motion, pushing the second plate 52 to rotate back and forth around the transmission shaft 41a, so as to achieve the effect of repeatedly tilting the load rod 42. Finally, the test instrument is connected to the push rod to be tested, and the changes in various parameters of the push rod to be tested are detected in real time, including its force, deformation, working state and other parameters, thereby analyzing the fatigue life and working performance of the push rod, providing a basis for the design improvement of the push rod.

[0022] In some embodiments of the present invention, the transmission structure 41 includes a transmission shaft 41a and a bearing seat 41b; a bearing seat 41b is arranged on each side of the load rod 42, and the bearing holes are relatively oriented; the bearing seat 41b is fixedly connected to the third support group 3; the transmission shaft 41a is rotationally connected to the bearing seat 41b; through such a rotational connection, the transmission shaft 41a can smoothly transmit power and load, reduce friction and resistance, and avoid the risks caused by excessive load when using a single bearing seat 41b, thereby improving the stability of the structure and ensuring that the load rod 42 moves smoothly during the test.

[0023] like Figure 2 As shown, one end of the load rod 42 is recessed inward to form an arc-shaped profile, and the transmission shaft 41a is embedded in this end; compared with a flat contact surface, the arc shape makes it easier to evenly distribute the load at the contact point and reduce local stress concentration. Through this design, the contact area between the load rod 42 and the transmission shaft 41a is increased, forming a tighter connection, which can effectively transmit load and movement.

[0024] Preferably, the diameter of a section of the transmission shaft 41a and the embedded load rod 42 can be designed to be slightly larger than the other parts, so that the load rod 42 is stuck in a fixed position on the transmission shaft 41a, avoiding the load rod 42 from sliding on the transmission shaft 41a during the test.

[0025] Please refer to Figure 3The connecting plate 5 includes a first plate 51 and a second plate 52. The second plate 52 and the first plate 51 are vertically connected to form an L shape, and a through hole 53 is opened at the contact point between the second plate 52 and the first plate 51, and the transmission shaft 41a passes through the through hole 53; the first plate 51 is fixedly connected to the load rod 42 to provide additional support to assist the stability of the load rod 42 during operation; such a design can disperse the stress at the connection to prevent local deformation or fatigue damage due to load concentration. Through the rotatable connecting plate 5, the friction during the test is reduced, the smoothness of the movement is improved, and a stable foundation is provided for the push rod to be tested to push the connecting plate 5 to rotate repeatedly.

[0026] Preferably, one connecting plate 5 is provided on each side of the load rod 42, so that the load rod 42 is supported symmetrically during the test, thereby reducing left and right shaking, avoiding offset or rotation caused by unilateral support, and improving the stability of load transfer; a plurality of gear holes 52a, that is, the adjustment position, are provided on the second plate 52 at intervals, and the adjustment position can also be in various forms such as buckles and slots, as long as the push rod can be adjusted to a fixed angle and length. In the present invention, the form of the gear hole 52a is used for specific description; since the second plate 52 is located on the side close to the tooling seat 6, by selecting different gear holes 52a, the force arm of the push rod to be tested on the second plate 52 to the transmission shaft 41a is different, so the torque generated by the load sandbag on the push rod is also different, so that the push rod to be tested can produce fatigue tests of different intensities under the load sandbag of the same weight, meet the test requirements under different working conditions, and there is no need to replace the test equipment or redesign the system, it can adapt to push rod tests of different types and load levels, reduce the workload, make the entire test process more convenient, and improve the applicability of the equipment.

[0027] In some embodiments of the present invention, Figure 1 and Figure 4 As shown, the first support group 1 also includes a positioning beam 11, which extends from one end to the other end along the length direction of the first support group 1; the positioning beam 11 has a plurality of positioning holes 11a spaced apart along the length direction; the plurality of positioning holes 11a on the positioning beam 11 allow the user to select a suitable position to fix the tooling seat 6 according to the length of the push rod or the test requirements, ensuring that it can adapt to push rods of different specifications and lengths; the design of the positioning holes 11a allows the tooling seat 6 to be easily disassembled and installed between different positions, and the user can quickly adjust or replace the tooling seat 6 as needed without replacing or readjusting other components, thereby reducing the time for equipment setup and making the test process more efficient.

[0028] Please refer to Figure 4Preferably, one side of the tooling seat 6 is recessed inward to form a clamping cavity 61, and the opening of the clamping cavity 61 faces the second support group 2, so as to clamp the end of the handle of the push rod to be tested, and have a larger contact area, making the clamping more stable, and due to the depth of the clamping cavity 61, the probability of the push rod shaking left and right during the test is also reduced; the tooling seat 6 is provided with a fixing hole 62 that is compatible with the positioning hole 11a, and a screw can be used to pass through the fixing hole 62 and the positioning hole 11a, and then fastened with a nut, so that the disassembly and installation operations of the tooling seat 6 are convenient, and the material is very common.

[0029] In some embodiments of the present invention, Figure 5 As shown, a third support group 3 is respectively arranged on both sides of the first support group 1 in the length direction, i.e., parallel to the positioning beam 11, and the third support group 3 includes a support beam 31, a support tube 32 and a support seat 33; a third support group 3 is arranged on each side, so that the load can be evenly transferred from both sides to the first support group 1, and finally to the ground, so that the overall structure is more stable, and the force transmission will not cause the shaking situation of too much on one side and too little on the other side, thereby providing a balanced test platform for the push rod to be tested; the support beam 31 is vertically fixed on the first support group 1; the support tube 32 is perpendicular to the support beam 31 and fixed on the end of the support beam 31 away from the first support group 3; the support seat 33 is fixed on the support tube 32; the transmission structure 41 is fixed on the support seat 33; the height of the support beam 31 provides a test space for the push rod to be tested; the support seat 33 is used to better fix the transmission structure 41 on the third support group 3, so as to avoid the transmission structure 41 from being offset when the push rod to be tested moves back and forth.

[0030] The third support group 3 also includes a supporting inclined tube 34, one installed on each side of the support beam 31; one end of the supporting inclined tube 34 is fixedly connected to the support tube 32, and the other end is fixedly connected to the first support group 1; the addition of the supporting inclined tube 34 enhances the rigidity of the support system, can better disperse the load, avoid overloading of a single support point, and can effectively prevent deformation of the equipment; it also increases the seismic resistance of the equipment, especially when it is highly loaded or subjected to external vibrations, it can effectively absorb and alleviate impact force, making the entire test equipment more stable.

[0031] Preferably, Figure 6As shown, the second support group 2 includes a support vertical rod 21, two of which are vertically installed at one end of the first support group 1, and a plurality of small holes can also be evenly spaced on the support vertical rod 21 for fixing the support cross bar 22 at different heights to adjust the rotation range of the load rod 42; a horizontal support cross bar 22 is fixedly installed between the two support vertical rods 21 by screws, and the support cross bar 22 can provide a support surface for the load rod 42 during the test process or when the equipment is not in use, so that the load rod 42 will not directly hit the ground or the equipment, thereby damaging the equipment; a threaded sealing piece can be installed at each end of the support cross bar 22, and through the combined design of the screw and the sealing piece, the installation process of the support cross bar 22 is simpler, the dependence on tools is reduced, and the installation is more efficient; a screw buffer pad can also be placed in the middle of the support beam; the screw buffer pad can absorb the collision energy generated by the load rod 42 when it is driven by the push rod to be tested to rotate back and forth during the test process and impacting the second support group 2, effectively reducing the direct friction between the load rod 42 and the support component, reducing equipment wear and failure rate; and also reducing the vibration and noise caused by the collision.

[0032] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. 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, which 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 fatigue testing device for an electric push rod, characterized in that: include: A first support group (1); A second support group (2) is fixedly installed at one end of the first support group (1); A third support group (3) is fixedly mounted on the first support group (1); A load assembly (4), comprising a transmission structure (41) fixedly connected to the third support group (3), and a load rod (42) rotatably connected to the transmission structure (41), wherein the load rod (42) extends from one side to the other side of the second support group (2) along the length direction of the first support group (1); A connecting plate (5) is rotatably connected to the transmission structure (41), one end of which is fixedly connected to the load rod (42), and the other end of which clamps the push rod to be tested by adjusting the position, wherein a plurality of adjustment positions are evenly arranged on the connecting plate (5); A tooling seat (6) is mounted on the first support group (1) and is located on a side away from the second support group (2); In the working state, the tooling seat (6) clamps the rod handle of the push rod to be tested, and one end of the piston rod of the push rod to be tested is connected to the connecting plate (5).

2. The fatigue testing device for electric push rod according to claim 1, characterized in that: The transmission structure (41) comprises a transmission shaft (41a) and a bearing seat (41b); one bearing seat (41b) is provided on each side of the load rod (42), and the bearing holes are oriented relative to each other; the bearing seat (41b) is fixedly connected to the third support group (3); and the transmission shaft (41a) is rotatably connected to the bearing seat (41b).

3. The fatigue testing device for electric push rod according to claim 2, characterized in that: One end of the load rod (42) is recessed inwards to form an arc-shaped profile, and the transmission shaft (41a) is embedded in this end.

4. The fatigue testing device for an electric push rod according to claim 1, characterized in that: The connecting plate (5) comprises a first plate (51) and a second plate (52); the second plate (52) and the first plate (51) are vertically connected, and a through hole (53) is provided at a contact point, and the transmission shaft (41a) passes through the through hole (53); the first plate (51) is fixedly connected to the load rod (42).

5. The fatigue testing device for an electric push rod according to claim 4, characterized in that: The connecting plate (5) is provided at each side of the load rod (42); and a plurality of shift holes (52a) are provided at intervals on the second plate (52).

6. The fatigue testing device for electric push rod according to claim 1, characterized in that: The first support group (1) further comprises a positioning beam (11) extending from one end to the other end along the length direction of the first support group (1); the positioning beam (11) is provided with a plurality of positioning holes (11a) at intervals along the length direction.

7. The fatigue testing device for an electric push rod according to claim 6, characterized in that: One side of the tooling seat (6) is recessed inward to form a clamping cavity (61), and the opening of the clamping cavity (61) faces the second support group (2); the tooling seat (6) is provided with a fixing hole (62) that matches the positioning hole (11a).

8. The fatigue testing device for electric push rod according to claim 1, characterized in that: A third support group (3) is respectively arranged on both sides of the first support group (1), and the third support group (3) comprises a support beam (31), a support tube (32) and a support seat (33); the support beam (31) is vertically fixed on the first support group (1); the support tube (32) is fixed perpendicular to the support beam (31) to an end of the support beam (31) away from the first support group (3); the support seat (33) is fixed on the support tube (32); and the transmission structure (41) is fixed on the support seat (33).

9. The fatigue testing device for an electric push rod according to claim 8, characterized in that: The third support group (3) further comprises a support inclined tube (34), one of which is installed on each side of the support beam (31); one end of the support inclined tube (34) is fixedly connected to the support tube (32), and the other end is fixedly connected to the first support group (1).

10. The fatigue testing device for electric push rod according to claim 1, characterized in that: The second support group (2) comprises support vertical rods (21), two of which are vertically installed at one end of the first support group (1); and a horizontal support cross bar (22) is installed between the two support vertical rods (21).

Images