Electric push rod load testing device

Abstract

The utility model belongs to the technical field of electric push rod testing equipment, and particularly discloses an electric push rod load testing device which comprises a rack, a telescopic driving part and a pair of fixing seats are arranged on the rack, the pair of fixing seats are arranged at intervals in the telescopic direction of the telescopic driving part, and a guide rod is arranged between the pair of fixing seats. A sliding head is arranged at the tail end of an output shaft of the telescopic driving part, located between the pair of fixing bases and slidably arranged on the guide rod in a sleeving mode, a pressure sensor is arranged on the end face of the sliding head, and a clamping base used for clamping the tail end of a push rod shaft of the electric push rod is coaxially connected to the end face, away from the sliding head, of the pressure sensor through a connecting part. A receding hole for the clamping base to penetrate out is formed in the fixing base away from the telescopic driving piece. According to the utility model, the pressure sensor extends and retracts along with the extension and retraction of the telescopic driving piece, so that the thrust and tension required by the electric push rod of the object to be tested are obtained, and the efficient, accurate and automatic load test of the electric push rod of the object to be tested is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of electric push rod testing equipment, in particular to an electric push rod load testing device. Background Art

[0002] With the rapid development of industrial automation, electric linear actuators, as an important actuator, are widely used in automation equipment, robotic arms, industrial production lines, aerospace, automobile manufacturing and other fields. The stability of its performance and load bearing capacity are directly related to the reliability and safety of the entire system. Therefore, it is particularly important to conduct accurate load testing on electric linear actuators.

[0003] Existing electric linear actuator load testing methods mostly use manual loading or simple mechanical loading devices. These methods have many shortcomings, such as low loading accuracy, limited test range, inconvenient data recording, and lack of automated control during the test process.

[0004] Therefore, the inventor is committed to designing a load testing device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide an electric push rod load testing device, which can realize efficient, accurate and automatic load testing of the electric push rod.

[0006] In order to achieve the above object, a technical solution adopted by the utility model is:

[0007] A load testing device for an electric push rod comprises a frame, on which a telescopic drive member and a pair of fixed seats are provided, the pair of fixed seats are spaced apart along the telescopic direction of the telescopic drive member, a guide rod is provided between the pair of fixed seats, a sliding head is provided at the end of the output shaft of the telescopic drive member, the sliding head is located between the pair of fixed seats and slidably sleeved on the guide rod, a pressure sensor is provided on the end surface of the sliding head, a clamping seat for clamping the end of the push rod shaft of the electric push rod is coaxially connected to the end surface of the pressure sensor away from the sliding head through a connecting member, and a clearance hole for the clamping seat to pass through is provided on one of the fixed seats away from the telescopic drive member.

[0008] As an improvement of the electric push rod load testing device of the utility model, an anti-sway part is provided on one side of the clamping seat, one end of the anti-sway part is slidably connected to a fixed seat away from the telescopic driving member, and the other end of the anti-sway part is annular and is used to be sleeved on the push rod shaft.

[0009] As an improvement of the load testing device for the electric push rod of the present utility model, a test reading head is fixed at the sliding end of the anti-oscillation member, and a test magnetic grating scale is provided on one of the fixed seats away from the telescopic driving member. The test reading head cooperates with the test magnetic grating scale.

[0010] As an improvement of the load testing device for the electric push rod of the present utility model, a clamping reading head is fixed on the side of the clamping seat, and a clamping magnetic grating scale is provided on one of the fixed seats away from the telescopic driving member. The clamping reading head cooperates with the clamping magnetic grating scale, and the sliding end of the anti-oscillation member is located between the test magnetic grating scale and the clamping magnetic grating scale.

[0011] As an improvement of the load testing device for the electric push rod of the present utility model, the clamping seat includes a seat body and a cover body. The seat body is L-shaped, and the cover body covers the seat body to form a cross-shaped space for clamping the end of the push rod shaft.

[0012] As an improvement of the load testing device for the electric push rod of the present utility model, a fixed fixture is provided at the product fixed end of the frame. A pair of the fixed seats are located between the telescopic driving member and the fixed fixture. The fixed fixture is provided with a clamping channel for clamping the electric push rod along the telescopic direction of the telescopic driving member.

[0013] As an improvement of the load testing device for the electric push rod of the present utility model, the fixed fixture includes a base, two upper covers and two locking members. The two upper covers are stacked on the two protruding parts of the base to form the clamping channel. The two locking members are respectively located on the two opposite side walls of the clamping channel and are clamped by the corresponding upper covers and the base.

[0014] As an improvement of the load testing device for the electric push rod of the present utility model, the telescopic driving member is an oil cylinder. A telescopic magnetic grating scale is provided on the frame. A connecting rod is movably penetrated through a pair of the fixed seats. One end of the connecting rod is fixed to the oil cylinder sliding head of the oil cylinder, and the other end of the connecting rod is provided with a telescopic reading head. The telescopic reading head matches with the telescopic magnetic grating scale.

[0015] As an improvement of the load testing device for the electric push rod of the present utility model, the frame includes a machine body and an extension frame. The extension frame is connected to the machine body through a connecting pipe. The oil cylinder and the telescopic magnetic grating scale are both fixed on the extension frame.

[0016] As an improvement of the load testing device for the electric push rod of the present utility model, the telescopic driving member is a cylinder. A telescopic magnetic grating scale is connected to the tops of a pair of the fixed seats. A telescopic reading head is provided on the cylinder sliding head of the cylinder. The telescopic reading head matches with the telescopic magnetic grating scale.

[0017] Compared with the prior art, for the electric push rod load testing device of the present utility model, a pressure sensor is arranged on the sliding head end face at the output end of the telescopic driving member, and the pressure sensor is connected to the clamping seat for clamping the end of the push rod shaft of the electric push rod by using a connecting member. As the telescopic driving member extends and retracts, the thrust and pull force required by the electric push rod to be tested are obtained, so as to realize efficient, accurate and automatic load testing of the electric push rod to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a perspective view of the electric push rod load testing device according to the first embodiment of the present utility model;

[0019] Figure 2 is a perspective view of the frame according to the first embodiment of the present utility model;

[0020] Figure 3 is Figure 2 an enlarged view of part A in

[0021] Figure 4 is a perspective view of testing the load of one electric push rod corresponding to one oil cylinder in the first embodiment of the present utility model;

[0022] Figure 5 is Figure 4 an enlarged view of part B in

[0023] Figure 6 is Figure 4 an enlarged view of part C in

[0024] Figure 7 is an enlarged perspective exploded view of the connection part between the oil cylinder and the electric push rod according to the first embodiment of the present utility model;

[0025] Figure 8 is a perspective view of the electric push rod load testing device according to the second embodiment of the present utility model;

[0026] Figure 9 is a perspective view of the frame according to the second embodiment of the present utility model;

[0027] Figure 10 is Figure 9 an enlarged view of part D in

[0028] Figure 11 is an enlarged perspective view of testing the load of one electric push rod corresponding to one air cylinder in the second embodiment of the present utility model;

[0029] Figure 12 is Figure 11 an enlarged view of part E in

[0030] Figure 13It is a three-dimensional exploded enlarged view of the connection part between the cylinder and the electric push rod of the second embodiment of the utility model.

[0031] Illustration Description:

[0032] 1. Frame; 11. Machine body; 12. Extension frame; 121. Connecting pipe; 13. First fixing seat; 14. Second fixing seat; 141. Clamping magnetic scale; 142. Anti-sway piece; 143. Test reading head; 144. Test magnetic scale; 145. Clearance hole; 15. Limit block; 16. Guide rod; 17. Telescopic magnetic scale; 171. Telescopic reading head; 2. Cylinder; 21. Cylinder output shaft; 22. Cylinder sliding head; 23. Connecting rod; 3. Pressure sensor; 31. Connecting piece; 4. Clamping seat; 41. Cover body; 42. Seat body; 43. Clamping reading head; 5. Fixing fixture; 51. Upper cover; 52. Locking piece; 53. Base; 6. Electric push rod; 61. Push rod shaft; 7. Anti-sway block; 8. Cylinder; 81. Cylinder output shaft; 82. Cylinder sliding head. DETAILED DESCRIPTION

[0033] The following is a detailed explanation of the implementation of the present invention in conjunction with the accompanying drawings. The accompanying drawings are for reference and illustration only and do not constitute a limitation on the scope of patent protection of the present invention.

[0034] Embodiment 1

[0035] Reference Figures 1 to 7 A load testing device for an electric push rod comprises a frame 1, on which a telescopic driving member and a pair of fixed seats are provided, the pair of fixed seats are spaced apart along the telescopic direction of the telescopic driving member, a guide rod 16 is provided between the pair of fixed seats, a sliding head is provided at the end of the output shaft of the telescopic driving member, the sliding head is located between the pair of fixed seats and is slidably sleeved on the guide rod 16, a pressure sensor 3 is provided on the end surface of the sliding head, and a clamping seat 4 for clamping the end of a push rod shaft 61 of an electric push rod 6 is coaxially connected to the end surface of the pressure sensor 3 away from the sliding head through a connecting member 31, and a clearance hole 145 for the clamping seat 4 to pass through is provided on a fixed seat away from the telescopic driving member.

[0036] Reference Figure 1 and Figure 2The telescopic driving member of the present embodiment is specifically the cylinder 2. Since the weight of the cylinder 2 is about 200kg, it can test heavy loads, and its test load can reach up to 20T. Therefore, the cylinder 2 needs a separate frame to resist the heavy load test. In the present embodiment, the frame 1 includes a body 11 and an extension frame 12. The extension frame 12 is connected to the body 11 through a plurality of connecting pipes 121 to form a long row. The number of the cylinders 2 is preferably two, and the two cylinders 2 are fixed on the extension frame 12 at intervals. A pair of fixing seats is provided in the telescopic direction of each cylinder 2. The same pair of fixing seats is specifically a first fixing seat 13 and a second fixing seat 14. The first fixing seat 13 is fixed to the edge of the extension frame 12 close to the body 11, and the second fixing seat 14 is fixed to the middle of the body 11. The clearance hole 145 is set at the top of the second fixing seat 14 to make the second fixing seat 14 U-shaped. Two guide rods 16 are fixedly connected between the first fixing seat 13 and the second fixing seat 14, and the cylinder output shaft 21 of the cylinder 2 is located between the two guide rods 16.

[0037] Reference Figure 4 and Figure 6 The oil cylinder output shaft 21 of each of the oil cylinders 2 passes through the first fixed seat 13, and a cylinder sliding head 22 is fixed to the output end of the oil cylinder output shaft 21. The oil cylinder sliding head 22 is T-shaped, and the left and right ends of the oil cylinder sliding head 22 are respectively slidably sleeved on the two guide rods 16. The oil cylinder 2 can drive the oil cylinder sliding head 22 to slide along the two guide rods 16 between the first fixed seat 13 and the second fixed seat 14 through the oil cylinder output shaft 21. The pressure sensor 3 is arranged on the front end surface of the oil cylinder sliding head 22, and the front end surface of the pressure sensor 3 (that is, the pressure sensor 3 is away from the oil cylinder sliding head 2 2) is connected to the clamping seat 4 through a connecting piece 31, the connecting piece 31 is located between the clamping seat 4 and the pressure sensor 3, the clamping seat 4 includes a seat body 42 and a cover body 41, the seat body 42 is provided with a notch and forms an L shape, the cover body 41 is covered at the notch of the seat body 42 and forms a cross-shaped space, the cross-shaped space is used to clamp the end of the push rod shaft 61 (the end of the push rod shaft 61 is cross-shaped) so that the push rod shaft 61 can be hinged to the clamping seat 4, each cylinder sliding head 22 is connected to the corresponding seat body 42 through an anti-sway block 7, and the anti-sway block 7 is located on the right side of the clamping seat 4.

[0038] Reference Figure 4 , Figure 5 and Figure 6, in order to measure the sliding stroke of the cylinder sliding head 22, a connecting rod 23 is provided beside each pair of fixed seats along the telescopic direction of the cylinder 2. The connecting rod 23 movably passes through the corresponding first fixed seat 13 and the corresponding second fixed seat 14. One end of the connecting rod 23 is fixed to the cylinder sliding head 22 of the cylinder 2, and a telescopic reading head 171 is provided at the other end of the connecting rod 23. Two long strip-shaped telescopic magnetic grating rulers 17 are fixed on the extension frame 12, and the two telescopic magnetic grating rulers 17 are respectively located beside the cylinder 2. The telescopic reading head 171 is matched with the corresponding telescopic magnetic grating ruler 17. When the magnetic signal of the telescopic magnetic grating ruler 17 passes through the telescopic reading head 171, the sensor in the telescopic reading head 171 will sense the change of the magnetic field and convert it into an electrical signal, so as to realize the reading and identification of the position information of the cylinder sliding head 22.

[0039] Referring to Figure 3 , Figure 4 and Figure 6 , in order to measure the moving stroke of the clamping seat 4, a clamping reading head 43 is fixed on the left side surface of the seat body 42. A long strip-shaped clamping magnetic grating ruler 141 is provided on the second fixed seat 14 (i.e., the fixed seat far from the telescopic driving member) along the telescopic direction of the cylinder 2. The clamping reading head 43 is matched with the clamping magnetic grating ruler 141. When the magnetic signal of the clamping magnetic grating ruler 141 passes through the clamping reading head 43, the sensor in the clamping reading head 43 will sense the change of the magnetic field and convert it into an electrical signal, so as to realize the reading and identification of the position information of the clamping seat 4.

[0040] Referring to Figure 3 , Figure 4 and Figure 6 , during the process of testing heavy loads, in order to prevent the product speed from being slow during the test of the pulling force, and the cylinder 2 retracts and rotates, resulting in the product connector falling off, a anti-rotation part 142 is provided on the left side of each clamping seat 4. The anti-rotation part 142 is integrally L-shaped. The rear end of the anti-rotation part 142 is long strip-shaped and is slidably connected to the corresponding second fixed seat 14. The front end of the anti-rotation part 142 is annular and is used to sleeved on the push rod shaft 61. A test reading head 143 is fixed at the sliding end of the anti-rotation part 142. A long strip-shaped test magnetic grating ruler 144 is also fixed on the second fixed seat 14 along the telescopic direction of the cylinder 2. The sliding end of the anti-rotation part 142 is located between the test magnetic grating ruler 144 and the clamping magnetic grating ruler 141. The clamping magnetic grating ruler 141 is located between the test magnetic grating ruler 144 and the cylinder output shaft 21. The test reading head 143 is located between the clamping magnetic grating ruler 141 and the test magnetic grating ruler 144. The test reading head 143 is matched with the test magnetic grating ruler 144. When the magnetic signal of the test magnetic grating ruler 144 passes through the test reading head 143, the sensor in the test reading head 143 will sense the change of the magnetic field and convert it into an electrical signal, so as to realize the reading and identification of the position information of the push rod shaft 61.

[0041] Referring toFigure 2 , Figure 3 and Figure 4 , the front end of the body 11 is the product fixing end. There are two pairs of fixing jigs 5 provided at the product fixing end of the body 11. The two pairs of fixing jigs 5 are respectively arranged along the telescopic directions of the two oil cylinders 2. The fixing jigs 5 of the same pair are arranged side by side along the telescopic direction of the corresponding oil cylinder 2. Both the first fixing seat 13 and the second fixing seat 14 are located between the oil cylinder 2 and a pair of fixing jigs 5. Each fixing jig 5 is provided with a clamping channel for clamping the electric push rod 6 along the telescopic direction of the oil cylinder 2. Each fixing jig 5 includes a base 53, two upper covers 51 and two T-shaped locking members 52. Concave-shaped protrusions are formed on both sides of the top end of the base 53. The two upper covers 51 are stacked on the two protruding parts of the base 53 to form a clamping channel. The two locking members 52 are respectively located on the two opposite side walls of the clamping channel and are clamped by the corresponding upper cover 51 and the base 53. The circular locking head of each locking member 52 has a certain elasticity. On the side of the body 11 far from the oil cylinder 2, two concave-shaped limiting blocks 15 are also fixed. The two limiting blocks 15 are respectively arranged along the telescopic direction of the oil cylinder 2. The fixing jig 5 is located between the limiting block 15 and the second fixing seat 14.

[0042] Referring to Figures 1 to 7 , the electric push rod load testing device of this embodiment is mainly used to test loads from 1T to 20T, and its usage method is as follows:

[0043] Place the product electric push rod 6 to be tested in the corresponding limiting block 15 and the clamping channel of the fixing jig 5. Adjust the distance between the locking members 52 on both sides of the same clamping channel to clamp the electric push rod 6. At this time, the push rod shaft 61 of the electric push rod 6 points to the oil cylinder 2, and the electric push rod 6 and the oil cylinder 2 are on the same straight line;

[0044] Put the annular end clamping end of the anti-oscillation member 142 on the push rod shaft 61 of the electric push rod 6, and then use the clamping seat 4 to clamp the cross part at the end of the push rod shaft 61 to make the push rod shaft 61 hinged with the clamping seat 4;

[0045] The oil cylinder 2 controls the telescopic movement of the oil cylinder output shaft 21, and then controls the oil cylinder sliding head 22 to slide between the first fixing seat 13 and the second fixing seat 14 along the two guide rods 16. The pressure sensor 3, the clamping seat 4, and the push rod shaft 61 all move together with the oil cylinder sliding head 22. On the one hand, the oil cylinder sliding head 22 drives the connecting rod 23 to move, and then drives the telescopic reading head 171 to move on the telescopic magnetic grating scale 17 to measure the moving position of the oil cylinder sliding head 22. On the other hand, the clamping reading head 43 moves on the clamping magnetic grating scale 141 along with the clamping seat 4 to measure the moving position of the clamping seat 4. On the other hand, the anti-oscillation member 142 slides on the second fixing seat 14 along with the push rod shaft 61, driving the test reading head 143 to move on the test magnetic grating scale 144 to measure the moving position of the push rod shaft 61;

[0046] When the oil cylinder output shaft 21 of the oil cylinder 2 is extended, the electric push rod 6 extends to form a thrust, and the pressure sensor 3 is squeezed. The thrust generated is input to the PLC (programmable logic controller) through analog quantity for conversion, and the current thrust of the pressure sensor 3 is displayed on the touch screen, thereby obtaining the thrust required by the electric push rod 6 of the object to be tested;

[0047] When the cylinder output shaft 21 of the cylinder 2 is shortened, the electric push rod 6 is shortened to form a pulling force, and the pressure sensor 3 is pulled externally. The pulling force generated when the pressure sensor 3 is pulled is input into the PLC (programmable controller) through analog quantity for conversion, and the current pulling force of the pressure sensor 3 is displayed on the touch screen, thereby obtaining the pulling force required by the electric push rod 6 of the object to be tested.

[0048] Embodiment 2

[0049] Reference Figures 8 to 13 , is the second embodiment of the utility model. The difference between this embodiment and the first embodiment is that the telescopic driving member of this embodiment is specifically a cylinder 8, which can measure small loads. Since the cylinder 8 is light, the frame 1 of this embodiment is specifically a body 11 (this embodiment does not need to use the extension frame 12 of the first embodiment). The number of cylinders 8 in this embodiment is preferably two, and the number of fixed seats also corresponds to two pairs. Each pair of fixed seats is specifically a first fixed seat 13 and a second fixed seat 14. The first fixed seat 13 and the second fixed seat 14 are both fixed on the body 11. The first fixed seat 13 is in a 凵 shape, and a clearance hole 145 is provided in the center of the second fixed seat 14 to form a frame shape. The clamping seat 4 can pass through the clearance hole 145 during movement. The first fixed seat 13 Three pairs of guide rods 16 are fixedly connected to the second fixed seat 14, the cylinder output shaft 81 of the cylinder 8 passes through the first fixed seat 13, and a cylinder sliding head 82 is provided at the end of the cylinder output shaft 81. The left and right ends of the cylinder sliding head 82 are respectively sleeved on the three pairs of guide rods 16, and a pressure sensor 3 is provided on the front end surface of the cylinder sliding head 82. The pressure sensor 3 is connected to the clamping seat 4 through a connecting piece 31. The first fixed seat 13 and the top of the second fixed seat 14 are commonly connected to a telescopic magnetic scale 17. A telescopic reading head 171 is provided on the cylinder sliding head 82, and the telescopic reading head 171 matches the telescopic magnetic scale 17 for measuring the movement displacement of the cylinder sliding head 82. Other structures and usage methods are the same as those in the first embodiment and will not be elaborated here.

[0050] The utility model electric push rod load testing device can automatically control the extension and retraction of the electric push rod 6, automatically detect product test data, automatically record and generate a table for storage, and the whole device is simple and convenient to install, safe and reliable.

[0051] The above-disclosed is only the preferred embodiment of the present utility model, and it cannot be used to limit the scope of the patent protection of the present utility model. Therefore, equivalent changes made according to the scope of the patent application of the present utility model still fall within the scope covered by the present utility model.

Claims

1. An electric push rod load testing device, comprising a frame, characterized in that, The frame is provided with a telescopic driving member and a pair of fixed seats, the pair of fixed seats are arranged at intervals along the telescopic direction of the telescopic driving member, a guide rod is provided between the pair of fixed seats, a sliding head is provided at the end of the output shaft of the telescopic driving member, the sliding head is located between the pair of fixed seats and is slidably mounted on the guide rod, a pressure sensor is provided on the end surface of the sliding head, and a clamping seat for clamping the end of the push rod shaft of the electric push rod is coaxially connected to the end surface of the pressure sensor away from the sliding head through a connecting member, and a clearance hole for the clamping seat to pass through is provided on one of the fixed seats away from the telescopic driving member.

2. The electric push rod load testing device according to claim 1, wherein An anti-swaying piece is provided on one side of the clamping seat, one end of the anti-swaying piece is slidably connected to a fixed seat away from the telescopic driving member, and the other end of the anti-swaying piece is annular and is used to be sleeved on the push rod shaft.

3. The electric push rod load testing device according to claim 2, wherein, A test reading head is fixed to the sliding end of the anti-sway component, and a test magnetic scale is provided on a fixed seat away from the telescopic driving component, and the test reading head cooperates with the test magnetic scale.

4. The electric push rod load testing device according to claim 3, characterized in that, A clamping reading head is fixed on the side of the clamping seat, and a clamping magnetic scale is provided on a fixed seat away from the telescopic driving component. The clamping reading head cooperates with the clamping magnetic scale, and the sliding end of the anti-swaying component is located between the test magnetic scale and the clamping magnetic scale.

5. The electric push rod load testing device according to claim 1, characterized in that The clamping seat comprises a seat body and a cover body, the seat body is L-shaped, and the cover body is arranged on the seat body to form a cross-shaped space for clamping the end of the push rod shaft.

6. The electric push rod load testing device according to claim 1, characterized in that A fixing clamp is provided at the product fixing end of the frame, a pair of fixing seats are located between the telescopic driving member and the fixing clamp, and the fixing clamp is provided with a clamping channel for clamping the electric push rod along the telescopic direction of the telescopic driving member.

7. The electric push rod load testing device according to claim 6, wherein, The fixing clamp includes a base, two upper covers and two locking pieces. The two upper covers are stacked on two protruding parts of the base to form the clamping channel. The two locking pieces are respectively located on two opposite side walls of the clamping channel and are clamped by the corresponding upper covers and the base.

8. The electric push rod load testing device according to claim 1, characterized in that, The telescopic driving part is an oil cylinder, a telescopic magnetic scale is provided on the frame, a pair of connecting rods are movably passed through the fixing seats, one end of the connecting rod is fixed to the oil cylinder sliding head of the oil cylinder, and the other end of the connecting rod is provided with a telescopic reading head, and the telescopic reading head matches the telescopic magnetic scale.

9. The electric push rod load testing device according to claim 8, characterized in that, The frame comprises a body and an extension frame, the extension frame is connected to the body through a connecting pipe, and the oil cylinder and the telescopic magnetic scale are both fixed on the extension frame.

10. The electric push rod load testing device according to claim 1, characterized in that, The telescopic driving member is a cylinder, a telescopic magnetic scale is connected to the top of a pair of the fixing seats, a telescopic reading head is provided on the cylinder sliding head of the cylinder, and the telescopic reading head matches the telescopic magnetic scale.

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