Lead screw pair loading test device

Abstract

The invention discloses a lead screw pair loading test device, and relates to the technical field of lead screw pair dynamic balance loading tests. In the process of carrying out dynamic balance loading test on the lead screw pair on the electric cylinder, whether dynamic balance detection of the lead screw pair is abnormal or not is judged through mutual cooperation of the test assembly, the identification assembly, the loading assembly and the transmission assembly, in the whole test process, the test is carried out after the electric cylinder is assembled, and the test efficiency is improved. The working states of actual telescoping of the telescopic rod and operation of the screw rod pair can be simulated, the problem that independent testing of the screw rod pair is disjointed with the actual assembly state is avoided, the testing result is closer to a real use scene, in addition, in the whole testing process, different positions of the telescopic rod can be detected and recognized through transmission, and the testing efficiency is improved. The load scene in the transmission process of the screw rod pair to the telescopic rod can be simulated, the actual working condition is fit in the whole test process, and the accuracy of the test experiment result is improved.

Description

Technical Field

[0001] The invention relates to the technical field of dynamic balance loading test of a screw pair, in particular to a loading test device for a screw pair. Background Art

[0002] During the use of the electric cylinder, the lead screw pair serves as the rotating drive component of the telescopic rod. If there is uneven mass distribution (such as manufacturing errors, assembly eccentricity, etc.), periodic centrifugal force (unbalanced force) will be generated during high-speed rotation, causing the lead screw itself and the electric cylinder to vibrate as a whole. This vibration not only generates noise, but may also couple with the natural frequency of the electric cylinder or equipment, causing resonance, leading to structural loosening, component fatigue damage (such as lead screw bending, increased bearing wear), and even affecting the stability of the entire equipment system. Therefore, after the production and assembly of the electric cylinder is completed, the lead screw pair on the electric cylinder needs to be subjected to a dynamic balance loading test.

[0003] During the dynamic balancing loading test of a screw pair, the traditional method is to install the screw alone on a balancing machine for testing. This method tests the dynamic balance of a single screw pair. However, after the screw pair is installed on the electric cylinder, assembly problems such as non-concentricity between the motor shaft and the screw, and excessive bearing clearance may still cause the overall dynamic balance to fail and induce vibration. Therefore, the existing test cannot reflect the dynamic balancing characteristics of the screw pair in the "overall assembly state". To this end, we propose a screw pair loading test device. Summary of the Invention

[0004] The object of the present invention is to provide a screw pair loading test device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a screw pair loading test device, comprising an operating table for performing a dynamic balance loading test on a screw pair, a mounting frame fixed to the operating table, an electric cylinder mounted on the mounting frame, a telescopic rod slidably connected to the front end of the electric cylinder, the screw pair being disposed inside the electric cylinder and used to drive the telescopic rod to extend and retract, and further comprising: The test assembly is set on the operating table for dynamic balancing test of the screw rod; An identification component is provided on the test component for detection and identification during the test process; A loading assembly is provided on the test assembly and is used to load the screw pair during the test; And, a transmission component is provided between the identification component and the load component for transmission during the identification process.

[0006] Preferably, the test assembly includes a test frame arranged on an operating table, an adjustment assembly for adjusting the position of the test frame is provided on the operating table, a mounting frame is fixed inside the test frame, a circular frame is rotatably connected to the mounting frame, a plurality of identification assemblies are provided, and the plurality of identification assemblies are arranged in a ring array inside the circular frame, a rotating assembly for rotating the circular frame is provided on the test frame, and a linkage assembly for assisting linkage is provided between the loading assembly and the rotating assembly; By adopting the above technical solution, the vibration of the telescopic rod is tested.

[0007] Preferably, the identification component includes a connecting plate arranged on the inner side of the circular frame, a telescopic component for assisting the telescopic connection is arranged between the connecting plate and the inner wall of the circular frame, the connecting plate is connected to a circular plate via an elastic component, a detection rod is fixed to the circular plate, the front end of the detection rod is rotatably connected to a ball for abutting and squeezing against the outer side of the telescopic rod through a spherical groove, and a vibration identification sensor for vibration identification is mounted on the circular plate; By adopting the above technical solution, when the vibration identification sensor on the circular plate detects vibration, it is determined that the dynamic balance detection of the screw pair is abnormal at this time, and the dynamic balance test of the screw pair is achieved.

[0008] Preferably, the telescopic assembly includes a plurality of first sleeves fixed to the connecting plate, the first sleeves are slidably connected to a first sliding rod, and one end of the first sliding rod is fixed to the inner wall of the circular frame; By adopting the above technical solution, it is convenient to guide the movement of the connecting plate after being subjected to force.

[0009] Preferably, the elastic component includes a plurality of second sleeves fixed on the circular plate, the second sleeves are slidably connected to the second slide rod, one end of the second slide rod is fixed to the connecting plate, the outer side of the second sleeve is sleeved with a first spring, and the two ends of the first spring are respectively connected to the circular plate and the connecting plate; By adopting the above technical solution, the ball at the front end of the push detection rod can better maintain contact with the outer side of the telescopic rod.

[0010] Preferably, the loading assembly includes a rectangular frame centrally arranged inside the circular frame, the inner side of the rectangular frame is rotatably connected to a push plate for abutting the end of the telescopic rod in a centered state, a rectangular plate is provided inside the test frame, a plurality of third sleeves are fixed on the rectangular plate, one end of the third sleeve is fixed to the push plate, the other end of the third sleeve is slidably connected to a third sliding rod, one end of the third sliding rod is fixed to the inner wall of the test frame, the outer side of the third sleeve is sleeved with a second spring for load transmission, and the two ends of the second spring are respectively abutted against the inner wall of the test frame and the rectangular plate; By adopting the above technical solution, the load scenario during the transmission of the telescopic rod by the screw pair is simulated, so that the entire test process is consistent with the actual working conditions and the accuracy of the test results is improved.

[0011] Preferably, the transmission assembly is arranged between the rectangular frame and the identification assembly, and the transmission assembly includes a transmission plate slidably connected to the inside of the circular frame, one end of the transmission plate is fixed to the outside of the rectangular frame, an oblique groove is formed on the transmission plate, a transmission pin is slidably connected to the oblique groove, a connecting frame is fixed to the connecting plate, and the transmission pin is fixed to the connecting frame; By adopting the above technical solution, each group of connecting plates is driven to move under force. During the movement of the connecting plates, the telescopic components guide the connecting plates after force, so that each group of connecting plates after force moves toward the outside of the telescopic rod. During the movement, the connecting action of the elastic component drives the ball at the front end of the detection rod on the circular plate to press against the outside of the telescopic rod.

[0012] Preferably, the rotating assembly includes a worm wheel fixed to the outside of the circular frame, the interior of the test frame is rotatably connected to a mounting shaft, a worm is fixed to the mounting shaft, and the worm and the worm wheel are meshed with each other; the linkage assembly includes a gear fixed to the mounting shaft, a rack is fixed to the rectangular plate, and the gear and the rack are meshed with each other; By adopting the above technical solution, the ball at the front end of the detection rod is kept against the outside of the telescopic rod while rotating around the outside of the telescopic rod, so that vibration detection and identification can be performed at different positions on the outside of the telescopic rod during the experimental test, thereby ensuring the accuracy of the dynamic balance test of the screw pair.

[0013] Preferably, the adjustment assembly includes a mounting base fixed on the operating table, a connecting plate is provided on one side of the mounting base, the connecting plate is detachably mounted to the test frame by bolts, and a cylinder for adjusting the position of the connecting plate is installed on the mounting base; By adopting the above technical solution, the test frame is moved above the operating table, and the distance between the test frame and the front end of the telescopic rod on the electric cylinder is adjusted by the movement of the test frame.

[0014] Compared with the prior art, the present invention has the following beneficial effects: During the dynamic balance loading test of the screw pair on the electric cylinder performed by the present invention, the dynamic balance detection of the screw pair is judged whether there is any abnormality through the mutual cooperation of the test component, the identification component, the loading component and the transmission component. During the entire test process, the test is carried out after the electric cylinder is assembled, which can simulate the actual extension and retraction of the telescopic rod and the working state of the screw pair, avoiding the problem of disconnection between the separate test of the screw pair and the actual assembly state. The test results are closer to the actual usage scenario. In addition, during the entire test process, the different positions of the telescopic rod can be detected and identified through transmission, and the scenario of the load in the process of the screw pair transmitting the telescopic rod can also be simulated, so that the entire test process is in line with the actual working conditions and the accuracy of the test experimental results is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall appearance structure of the present invention; Figure 2 This is a structural diagram of the electric cylinder and operating table of the present invention; Figure 3 Schematic diagram of the positional relationship between the screw rod pair and the electric cylinder of the present invention; Figure 4 This is a schematic diagram of the telescopic assembly structure of the present invention; Figure 5 This is a schematic diagram of the test assembly structure of the present invention; Figure 6 A schematic diagram of the positional relationship between the identification component and the circular frame of the present invention; Figure 7 It is a schematic structural diagram of the rotating assembly and linkage assembly of the present invention; Figure 8 A schematic diagram of the positional relationship between the loading component and the identification component of the present invention; Figure 9 This is a schematic structural diagram of the identification component, telescopic component and elastic component of the present invention; Figure 10 It is a schematic structural diagram of the transmission assembly and the loading assembly of the present invention; Figure 11 This is a schematic diagram of the identification component of the present invention before detection; Figure 12 This is a schematic diagram of the identification component of the present invention after detecting the transmission state.

[0016] In the figure: 101 - operating table; 102 - mounting frame; 103 - electric cylinder; 104 - telescopic rod; 201 - test frame; 202 - mounting frame; 203 - circular frame; 301 - mounting base; 302 - cylinder; 303 - connecting plate; 401 - connecting plate; 402 - circular plate; 403 - detection rod; 404 - ball bearing; 501 - first sleeve; 502 - first slide rod; 601 - second sleeve ;602-second slide bar;603-first spring;701-rectangular frame;702-push plate;703-rectangular plate;704-third sleeve;705-third slide bar;706-second spring;801-transmission plate;802-bevel groove;803-transmission pin;804-connecting frame;901-worm gear;902-mounting shaft;903-worm;1001-rack;1002-gear. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] Example 1: Please refer to Figures 1-12 The figure shows a screw pair loading test device, which includes an operating table 101 for dynamic balance loading test of the screw pair. A mounting frame 102 is fixed to the operating table 101, and an electric cylinder 103 is mounted on the mounting frame 102. The front end of the electric cylinder 103 is slidably connected to a telescopic rod 104. The screw pair is arranged inside the electric cylinder 103 and is used to drive the telescopic rod 104 to extend and retract. It should be noted that during the dynamic balancing load test of the lead screw pair on the electric cylinder 103, the lead screw pair to be tested is assembled and installed inside the electric cylinder 103 according to the design requirements. After the installation is completed, the entire electric cylinder 103 is mounted on the mounting frame 102 and the telescopic rod 104 on the electric cylinder 103 is placed toward the test frame 201. The installation of the lead screw pair inside the electric cylinder 103 and the installation of the electric cylinder 103 on the mounting frame 102 are conventional technical means in this application. The working principle and operation method thereof are well-known technologies and will not be described in detail here. Also includes: A test assembly, provided on the operating table 101, is used for dynamic balancing test of the screw pair; An identification component is provided on the test component for detection and identification during the test process; A loading assembly is provided on the test assembly and is used to load the screw pair during the test; and, a transmission component disposed between the identification component and the load component for transmitting power during the identification process; It should be noted here that: during the dynamic balance loading test of the screw pair on the electric cylinder 103, the dynamic balance detection of the screw pair is judged whether there is any abnormality through the cooperation of the test component, the identification component, the loading component and the transmission component. During the entire test process, the test is carried out after the electric cylinder 103 is assembled. It can simulate the actual extension and retraction of the telescopic rod 104 and the working state of the screw pair, avoiding the problem of disconnection between the separate test of the screw pair and the actual assembly state. The test results are closer to the actual usage scenario. In addition, during the entire test process, through transmission, different positions of the telescopic rod 104 can be detected and identified, and the load scenario of the screw pair in the transmission process of the telescopic rod 104 can also be simulated, so that the entire test process is in line with the actual working conditions and the accuracy of the test experimental results is improved.

[0019] Preferably, the test assembly includes a test frame 201 provided on the operating table 101, an adjustment assembly for adjusting the position of the test frame 201 is provided on the operating table 101, a mounting frame 202 is fixed inside the test frame 201, a circular frame 203 is rotatably connected to the mounting frame 202, multiple groups of identification components are provided, and the multiple groups of identification components are arranged in a ring array inside the circular frame 203, a rotating assembly for rotating the circular frame 203 is provided on the test frame 201, and a linkage assembly for assisting linkage is provided between the loading assembly and the rotating assembly; It should be noted here that the vibration of the telescopic rod 104 is tested by the testing assembly.

[0020] Preferably, the identification component includes a connecting plate 401 arranged on the inner side of the circular frame 203, a telescopic component for assisting the telescopic connection is provided between the connecting plate 401 and the inner wall of the circular frame 203, a circular plate 402 is connected to the connecting plate 401 via an elastic component, a detection rod 403 is fixed to the circular plate 402, the front end of the detection rod 403 is rotatably connected to a ball 404 for abutting and squeezing the outer side of the telescopic rod 104 through a spherical groove, and a vibration recognition sensor for vibration recognition is installed on the circular plate 402; It should be noted here that: through transmission, the ball bearing 404 at the front end of the detection rod 403 on the circular plate 402 is driven to offset the outer side of the telescopic rod 104, and the offset effect is guaranteed under the elastic force of the elastic component. In the offset process, the movement of the telescopic rod 104 is driven by the screw pair. If the mass distribution of the screw pair is uneven as a rotating component, it will cause the principal axis of inertia during rotation to not coincide with the geometric rotation axis. This deviation will generate periodic centrifugal force and cause the telescopic rod 104 to vibrate radially and axially during the transmission process. Since the ball bearing 404 at the front end of the detection rod 403 is kept in contact with the outer side of the telescopic rod 104, the vibration of the telescopic rod 104 will drive the detection rod 403 and the circular plate 402 to vibrate. When the vibration recognition sensor on the circular plate 402 detects vibration, it is determined that the dynamic balance detection of the screw pair is abnormal at this time, thereby realizing the dynamic balance test of the screw pair. It is worth noting here that the vibration recognition sensor in this application is a conventional component for vibration detection and recognition. Its working principle and operation method are well-known technologies and will not be described in detail here.

[0021] Preferably, the telescopic assembly includes a plurality of first sleeves 501 fixed on the connecting plate 401, and a first slide bar 502 is slidably connected to the first sleeve 501, and one end of the first slide bar 502 is fixed to the inner wall of the circular frame 203; It should be noted here that the first sleeve 501 and the first slide bar 502 facilitate the telescopic guidance of the movement of the connecting plate 401 after being subjected to force.

[0022] Preferably, the elastic component includes a plurality of second sleeves 601 fixed on the circular plate 402, a second slide bar 602 is slidably connected to the second sleeve 601, one end of the second slide bar 602 is fixed to the connecting plate 401, and a first spring 603 is sleeved on the outer side of the second sleeve 601, and the two ends of the first spring 603 are respectively connected to the circular plate 402 and the connecting plate 401; It should be noted here that: after the ball 404 at the front end of the detection rod 403 is against the outer side of the telescopic rod 104, accompanied by the continued driving action on the connecting plate 401 and the limiting action of the outer side of the telescopic rod 104 on the detection rod 403 and the circular plate 402, the connecting plate 401 is caused to retract toward the circular plate 402. During the retraction movement, the second sliding rod 602 is pushed to slide on the second sleeve 601 and the first spring 603 is deformed under force to generate elastic force. Through the elastic force of the first spring 603, the ball 404 at the front end of the detection rod 403 can be better kept against the outer side of the telescopic rod 104.

[0023] Preferably, the loading assembly includes a rectangular frame 701 centrally arranged inside the circular frame 203, the inner side of the rectangular frame 701 is rotatably connected to a push plate 702 for abutting against the end of the telescopic rod 104 in a centered state, a rectangular plate 703 is provided inside the test frame 201, and multiple groups of third sleeves 704 are fixed on the rectangular plate 703, one end of the third sleeve 704 is fixed to the push plate 702, and the other end of the third sleeve 704 is slidably connected to a third slide bar 705, one end of the third slide bar 705 is fixed to the inner wall of the test frame 201, and the outer side of the third sleeve 704 is provided with a second spring 706 for load transmission, and the two ends of the second spring 706 are respectively abutted against the inner wall of the test frame 201 and the rectangular plate 703; It should be noted here that: when one end of the telescopic rod 104 is in contact with the push plate 702 to push the push plate 702 and the rectangular plate 703 to move, the third sliding rod 705 slides on the third sleeve 704 and causes the second spring 706 to deform under force to generate elastic force. The elastic force of the second spring 706 generates resistance to the movement of the rectangular plate 703, the push plate 702 and the telescopic rod 104. Through the resistance effect, the load scenario of the screw pair transmitting the telescopic rod 104 is simulated, so that the entire test process is in line with the actual working conditions and the accuracy of the test results is improved.

[0024] Preferably, the transmission assembly is arranged between the rectangular frame 701 and the identification assembly, and the transmission assembly includes a transmission plate 801 slidably connected to the inside of the circular frame 203, one end of the transmission plate 801 is fixed to the outside of the rectangular frame 701, an inclined groove 802 is opened on the transmission plate 801, a transmission pin 803 is slidably connected to the inclined groove 802, a connecting frame 804 is fixed to the connecting plate 401, and the transmission pin 803 is fixed to the connecting frame 804; It should be noted here that: through the driving action of the screw pair, the telescopic rod 104 is extended toward the test frame 201 on the electric cylinder 103. During the movement of the telescopic rod 104, one end of the telescopic rod 104 passes into the interior of the test frame 201 and passes through between each group of identification components. During the passing process, one end of the telescopic rod 104 abuts against the push plate 702 on the rectangular frame 701. After the abutment, with the continued movement of the telescopic rod 104 and the abutment between the push plate 702 and one end of the telescopic rod 104, the rectangular frame 701 and the push plate 702 on the rectangular frame 701 move synchronously with the movement of the telescopic rod 104. During the movement of the rectangular frame 701, each group of transmission plates 801 is driven to move synchronously. During the movement of the transmission plate 801, the interaction between the inclined slot 802 and the transmission pin 803 and the connection of the connecting frame 804 drive each group of connecting plates 401 to move under force. During the movement of the connecting plate 401, the telescopic component guides the connecting plate 401 after the force is applied, so that each group of connecting plates 401 after the force is applied moves toward the outside of the telescopic rod 104. During the movement, the connection of the elastic component drives the ball 404 at the front end of the detection rod 403 on the circular plate 402 to press against the outside of the telescopic rod 104.

[0025] Preferably, the rotating assembly includes a worm gear 901 fixed to the outside of the circular frame 203, the interior of the test frame 201 is rotatably connected to a mounting shaft 902, a worm 903 is fixed to the mounting shaft 902, and the worm 903 and the worm gear 901 are meshed with each other; the linkage assembly includes a gear 1002 fixed to the mounting shaft 902, a rack 1001 is fixed to the rectangular plate 703, and the gear 1002 and the rack 1001 are meshed with each other; It should be noted here that: during the detection process, as one end of the telescopic rod 104 pushes the push plate 702 against the push plate 702 to push the push plate 702 to move, the rectangular plate 703 is driven to move synchronously through the connection effect of the third sleeve 704. During the movement of the rectangular plate 703, the rack 1001 is driven to move. During the movement of the rack 1001, the mutual meshing transmission between the rack 1001 and the gear 1002 drives the mounting shaft 902 and the worm 903 on the mounting shaft 902 to rotate. During the rotation of the worm 903, the worm 903 is driven to rotate. The mutual meshing transmission between 03 and the worm gear 901 causes the circular frame 203 to be forced to rotate on the mounting frame 202. During the rotation of the circular frame 203, the identification component is driven to rotate synchronously through the connection of the telescopic component. Through the rotation of the identification component, the ball 404 at the front end of the detection rod 403 is kept against the outside of the telescopic rod 104 while rotating around the outside of the telescopic rod 104. During the experimental test, vibration detection and identification can be performed on different positions on the outside of the telescopic rod 104 to ensure the accuracy of the dynamic balance test of the screw pair.

[0026] Preferably, the adjustment assembly includes a mounting base 301 fixed to the operating table 101, a connecting plate 303 is provided on one side of the mounting base 301, the connecting plate 303 is detachably mounted to the test frame 201 via bolts, and a cylinder 302 is installed on the mounting base 301 for adjusting the position of the connecting plate 303; It should be noted that the cylinder 302 moves the connecting plate 303 and connects the connecting plate 303 to the test frame 201, so that the test frame 201 moves above the operating table 101. The movement of the test frame 201 adjusts the distance between the test frame 201 and the front end of the telescopic rod 104 on the electric cylinder 103.

[0027] In this solution: A screw pair loading test device includes the following steps: During the dynamic balancing loading test of the lead screw pair on the electric cylinder 103, the lead screw pair to be tested is assembled and installed inside the electric cylinder 103 according to the design requirements. After the installation is completed, the entire electric cylinder 103 is installed on the mounting frame 102 and the telescopic rod 104 on the electric cylinder 103 is set toward the test frame 201. After the installation is completed, the cylinder 302 moves the connecting plate 303 and the connecting plate 303 is connected to the test frame 201, so that the test frame 201 is moved above the operating table 101. The movement of the test frame 201 adjusts the distance between the test frame 201 and the front end of the telescopic rod 104 on the electric cylinder 103. After the electric cylinder 103 equipped with the screw pair to be tested is installed, the telescopic rod 104 is extended toward the test frame 201 on the electric cylinder 103 by the driving action of the screw pair. During the movement of the telescopic rod 104, one end of the telescopic rod 104 passes into the interior of the test frame 201 and passes through between each group of identification components. During the passing process, one end of the telescopic rod 104 abuts against the push plate 702 on the rectangular frame 701. After the abutment, with the continued movement of the telescopic rod 104 and the abutment between the push plate 702 and one end of the telescopic rod 104, the rectangular frame 701 and the rectangular frame 701 are The push plate 702 moves synchronously with the movement of the telescopic rod 104. During the movement of the rectangular frame 701, the transmission plates 801 of each group are driven to move synchronously. During the movement of the transmission plate 801, the interaction between the inclined slot 802 and the transmission pin 803 and the connection of the connecting frame 804 drive the connection plates 401 to move under force. During the movement of the connection plates 401, the telescopic assembly guides the connection plates 401 after force is applied, so that the connection plates 401 of each group after force is applied move toward the outside of the telescopic rod 104. During the movement, the circular plate 401 is driven by the connection of the elastic assembly. 02 The ball 404 at the front end of the detection rod 403 on the upper side is offset against the outer side of the telescopic rod 104, and the offset effect is ensured under the elastic force of the elastic component. In the offset process, the movement of the telescopic rod 104 is driven by the screw pair. As a rotating component, if the screw pair (mainly refers to the screw) has uneven mass distribution (such as material density deviation during manufacturing, eccentricity in processing, or installation tilt during assembly, non-concentricity with the motor shaft, etc.), it will cause the main axis of inertia during rotation to not coincide with the geometric rotation axis. This deviation will generate periodic centrifugal force and cause the telescopic rod 104 to undergo radial and axial movements during the transmission process. Vibration: Because the ball 404 at the front end of the detection rod 403 is kept against the outer side of the telescopic rod 104, the vibration of the telescopic rod 104 will drive the detection rod 403 and the circular plate 402 to vibrate. When the vibration recognition sensor on the circular plate 402 detects vibration, it is determined that the dynamic balance detection of the screw pair is abnormal at this time, and the dynamic balance test of the screw pair is realized. During the entire test process, the test is carried out after the electric cylinder 103 is assembled. It can simulate the actual extension and retraction of the telescopic rod 104 and the working state of the screw pair, avoiding the problem of disconnection between the separate test of the screw pair and the actual assembly state. The test result is closer to the real use scenario; During the detection process, as one end of the telescopic rod 104 is against the push plate 702 to push the push plate 702 to move, the rectangular plate 703 is driven to move synchronously through the connection effect of the third sleeve 704. During the movement of the rectangular plate 703, the rack 1001 is driven to move. During the movement of the rack 1001, the mutual meshing transmission between the rack 1001 and the gear 1002 drives the mounting shaft 902 and the worm 903 on the mounting shaft 902 to rotate. During the rotation of the worm 903, the mutual meshing transmission between the worm 903 and the worm wheel 901 causes the circular frame 203 to be forced to rotate on the mounting frame 202. During the rotation of the circular frame 203, the connection effect of the telescopic component drives the identification component to rotate synchronously. Through the rotation of the identification component, the front end of the detection rod 403 is The ball 404 is kept against the outer side of the telescopic rod 104 while rotating around the outer side of the telescopic rod 104, so that during the experimental test, vibration detection and identification can be performed on different positions of the outer side of the telescopic rod 104, thereby ensuring the accuracy of the dynamic balance test of the screw pair. In addition, when one end of the telescopic rod 104 is against the push plate 702 and pushes the push plate 702 and the rectangular plate 703 to move, the third sliding bar 705 slides on the third sleeve 704 and causes the second spring 706 to be deformed by force to generate elastic force. The elastic force of the second spring 706 generates resistance to the movement of the rectangular plate 703, the push plate 702 and the telescopic rod 104. Through the resistance effect, the scenario of the load during the transmission of the telescopic rod 104 by the screw pair is simulated, so that the entire test process is in line with the actual working conditions and the accuracy of the test experimental results is improved.

[0028] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0029] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A screw pair loading test device, comprising: An operating table (101) for performing a dynamic balance loading test on a screw pair, wherein a mounting frame (102) is fixed on the operating table (101), an electric cylinder (103) is mounted on the mounting frame (102), a front end of the electric cylinder (103) is slidably connected to a telescopic rod (104), and the screw pair is arranged inside the electric cylinder (103) and is used to drive the telescopic rod (104) to extend and retract; It is characterized by further comprising: A test assembly, arranged on an operating table (101) for testing the dynamic balance of the screw rod pair; An identification component is provided on the test component for detection and identification during the test; A loading assembly is provided on the test assembly and is used to load the screw pair during the test; And, a transmission component is provided between the identification component and the load component for transmitting during the identification process.

2. A screw pair loading test device according to claim 1, characterized in that: The test assembly comprises a test frame (201) arranged on an operating table (101); an adjustment assembly for adjusting the position of the test frame (201) is arranged on the operating table (101); a mounting frame (202) is fixed inside the test frame (201); a circular frame (203) is rotatably connected to the mounting frame (202); a plurality of identification assemblies are provided, and the plurality of identification assemblies are arranged in a state of an annular array inside the circular frame (203); a rotation assembly for rotating the circular frame (203) is provided on the test frame (201); and a linkage assembly for assisting linkage is provided between the loading assembly and the rotation assembly.

3. A screw pair loading test device according to claim 2, characterized in that: The identification component comprises a connecting plate (401) arranged on the inner side of the circular frame (203); a telescopic component for assisting the telescopic connection is arranged between the connecting plate (401) and the inner wall of the circular frame (203); a circular plate (402) is connected to the connecting plate (401) via an elastic component; a detection rod (403) is fixed to the circular plate (402); a front end of the detection rod (403) is rotatably connected to a ball (404) for contacting and squeezing the outer side of the telescopic rod (104) via a spherical groove; and a vibration identification sensor for vibration identification is installed on the circular plate (402).

4. A screw pair loading test device according to claim 3, characterized in that: The telescopic assembly comprises a plurality of first sleeves (501) fixed on the connecting plate (401), a first sliding rod (502) being slidably connected to the first sleeves (501), and one end of the first sliding rod (502) being fixed to the inner wall of the circular frame (203).

5. The screw pair loading test device according to claim 3, characterized in that: The elastic component includes a plurality of second sleeves (601) fixed on the circular plate (402), a second slide bar (602) is slidably connected to the second sleeve (601), one end of the second slide bar (602) is fixed to the connecting plate (401), and a first spring (603) is sleeved on the outer side of the second sleeve (601), and the two ends of the first spring (603) are respectively connected to the circular plate (402) and the connecting plate (401).

6. A screw pair loading test device according to claim 3, characterized in that: The loading assembly includes a rectangular frame (701) centrally arranged inside the circular frame (203), the inner side of the rectangular frame (701) is rotatably connected to a push plate (702) for abutting against the end of the telescopic rod (104), a rectangular plate (703) is arranged inside the test frame (201), a plurality of third sleeves (704) are fixed on the rectangular plate (703), one end of the third sleeve (704) is fixed to the push plate (702), the other end of the third sleeve (704) is slidably connected to a third slide bar (705), one end of the third slide bar (705) is fixed to the inner wall of the test frame (201), the outer side of the third sleeve (704) is sleeved with a second spring (706) for load transmission, and the two ends of the second spring (706) are respectively abutted against the inner wall of the test frame (201) and the rectangular plate (703).

7. A screw pair loading test device according to claim 6, characterized in that: The transmission assembly is arranged between the rectangular frame (701) and the identification assembly, and the transmission assembly includes a transmission plate (801) slidably connected to the inside of the circular frame (203), one end of the transmission plate (801) is fixed to the outer side of the rectangular frame (701), an inclined groove (802) is provided on the transmission plate (801), a transmission pin (803) is slidably connected to the inclined groove (802), a connecting frame (804) is fixed on the connecting plate (401), and the transmission pin (803) is fixed on the connecting frame (804).

8. A screw pair loading test device according to claim 7, characterized in that: The rotating assembly comprises a worm wheel (901) fixed to the outside of the circular frame (203); the interior of the test frame (201) is rotatably connected to a mounting shaft (902); a worm (903) is fixed to the mounting shaft (902); and the worm (903) and the worm wheel (901) are meshed with each other.

9. A screw pair loading test device according to claim 8, characterized in that: The linkage assembly comprises a gear (1002) fixed on the mounting shaft (902), a rack (1001) is fixed on the rectangular plate (703), and the gear (1002) and the rack (1001) are meshed with each other.

10. The screw pair loading test device according to claim 2, characterized in that: The adjustment assembly comprises a mounting base (301) fixed on an operating table (101), a connecting plate (303) is provided on one side of the mounting base (301), the connecting plate (303) and the test frame (201) are detachably mounted via bolts, and a cylinder (302) for adjusting the position of the connecting plate (303) is mounted on the mounting base (301).

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