Hardness tester for hardware

Abstract

The hardness tester comprises a bottom frame and an L-shaped frame, the L-shaped frame is installed on the outer wall of the bottom frame, an overturning frame is arranged outside the top end of the L-shaped frame, fixing seats are symmetrically and movably installed on the outer wall of the overturning frame, the fixing seats are fixedly connected with the L-shaped frame, and the fixing seats are fixedly connected with the L-shaped frame. And linkage shafts are movably mounted at the top ends of the fixing seats, and the fixing seats are movably connected with the overturning frame through the linkage shafts. According to the hardware hardness testing device, hardware can be conveniently conveyed to be subjected to hardness testing, testing treatment is adjusted in an inclined mode, the hardware can be rapidly and conveniently subjected to circumferential rotating adjustment in batches, the tested hardware can be conveniently and rapidly discharged, and the conveyed hardware can be subjected to multi-angle rotating inclined hardness testing; and the hardware hardness detection precision and the batch hardness detection efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hardness testers, and particularly relates to a hardness tester for hardware parts. Background Art

[0002] Hardware parts refer to various daily necessities processed from various metal materials and non-metal materials. Hardware parts are mainly functional in use and include various categories such as various tools, building materials, mechanical accessories, household items, etc. Hardware parts have various complex geometric shapes and sizes and require various processing methods for manufacturing. Hardware parts are widely used in various fields. In the household aspect, hardware parts can be used for door locks, door handles, ornaments, etc. In the construction aspect, hardware parts can be used for doors, windows, door locks, steel bars, etc. In the mechanical equipment aspect, hardware parts can be used for the assembly and repair of various equipment. In the electronic aspect, hardware parts can be used for the manufacture of electronic products such as plugs and sockets. In the automotive aspect, hardware parts can be used for the manufacture, repair, and maintenance of automotive parts.

[0003] As disclosed in a hardware part hardness tester with the authorization announcement number CN217931217U, it includes a workbench and a tester body arranged on the workbench. The tester body includes a bearing seat and a support frame connected to one side of the bearing seat. A detection plate is arranged on the bearing seat, and a plurality of accommodation grooves for accommodating the bottom of the hardware parts are opened on the detection plate. A fixing component for fixing the hardware parts is arranged in the accommodation groove. The fixing component includes two springs oppositely arranged on the inner wall of the accommodation groove and a pressing member arranged at one end of the spring for abutting against the side of the hardware part. A lower pressing plate is arranged on the support frame in a liftable manner. The lower pressing plate is located above the detection plate, and a lower pressing component is arranged on the side of the lower pressing plate facing the detection plate.

[0004] Although it can fix the hardware parts and prevent the hardware parts from shifting during downward pressing, it does not solve the problem that the existing hardness testers are not conducive to conveniently transporting the hardware parts for hardness testing, adjusting the test process in an inclined manner, quickly and batchwise rotating and adjusting the hardware parts conveniently in a circumferential manner, and it is not convenient to quickly discharge the tested hardware parts and perform multi-angle rotating and inclined hardness testing on the transported hardware parts, which greatly affects the accuracy of hardware part hardness detection and the efficiency of batch hardness detection. Summary of the Utility Model

[0005] The purpose of the present utility model is to provide a hardness tester for hardware parts, so as to solve the problems in the above-mentioned background technology that the hardness tester is not convenient for conveniently transporting the hardware parts for hardness testing, adjusting the test process in an inclined manner, quickly and batchwise adjusting the hardware parts conveniently in a circumferential manner, not being convenient for quickly discharging the tested hardware parts and performing multi-angle rotational and inclined hardness testing on the transported hardware parts, which affects the accuracy of the hardness detection of the hardware parts and the efficiency of batch hardness detection.

[0006] To achieve the above purpose, the present utility model provides the following technical solution: A hardness tester for hardware parts, including a bottom frame and an L-shaped frame. The L-shaped frame is installed on the outer wall of the bottom frame. A flipping frame is arranged outside the top of the L-shaped frame. Fixed seats are symmetrically and movably installed on the outer wall of the flipping frame, and the fixed seats are all fixedly connected to the L-shaped frame. A linkage shaft is movably installed at the top of the fixed seats, and the fixed seats are all movably connected to the flipping frame through the linkage shaft. A sliding frame is slidably installed inside the flipping frame. A hydraulic cylinder is installed at the center position of the top of the sliding frame. The output end of the hydraulic cylinder is installed with a pressure sensor body. The bottom end of the pressure sensor body is installed with a transmission block. A detection indenter is installed at the center position of the bottom end of the transmission block. Conveyor frames are symmetrically installed on the top of the bottom frame.

[0007] Preferably, a stepping motor is installed on the outer wall of the conveyor frame above the bottom frame. The output end of the stepping motor is installed with a transmission shaft, and both ends of the transmission shaft extend to the surface of the conveyor frame. First wheels are sleeved on the outer wall of the transmission shaft on one side of the conveyor frame. Second wheels are installed on the side of the conveyor frame away from the first wheels. Belts are installed on the outer walls of the first wheels, and the belts all extend to the surfaces of the second wheels on the same side.

[0008] Preferably, first electric push rods are installed on the outer walls of the conveyor frames on one side of the belts. Clamping blocks are installed at the output ends of the first electric push rods.

[0009] Preferably, a third electric push rod is installed on the outer wall of the flipping frame on one side of the sliding frame, and the output end of the third electric push rod is connected to the sliding frame. Limiting arms are symmetrically installed on the outer wall of the sliding frame, and the limiting arms are all slidably connected to the flipping frame.

[0010] Preferably, support seats are installed on the outer walls of the L-shaped frames below the fixed seats. Second electric push rods are movably installed at the tops of the support seats. The output ends of the second electric push rods are movably installed with hinge shafts, and the second electric push rods are all movably connected to the flipping frame through the hinge shafts.

[0011] Preferably, a lower push block is slidably mounted on the top end of the bottom frame below the conveying frame. A rotating box is mounted on the top end of the lower push block. A rotating shaft is mounted inside the rotating box. A rotating frame is mounted on the top end of the rotating shaft.

[0012] Preferably, a lower electric push rod is mounted at the center position of the top end of the bottom frame below the lower push block, and the output end of the lower electric push rod is connected to the lower push block. A rotating motor is mounted inside the rotating box above the lower push block. A worm is mounted at the output end of the rotating motor. A worm gear is mounted inside the rotating box on one side of the worm. The worm gear meshes with the worm, and the worm gear is connected to the rotating shaft.

[0013] Preferably, a remote controller is mounted on the outer wall of the bottom frame on one side of the L-shaped frame, and the output end of the remote controller is electrically connected to the input ends of the third electric push rod, the hydraulic cylinder, the pressure sensor body, the second electric push rod, the first electric push rod, the stepping motor, the rotating motor, and the lower electric push rod.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: This hardness tester not only realizes the convenient conveyance of hardware parts for hardness testing, the inclined adjustment of the testing process, the rapid batch and convenient circumferential rotation adjustment of the hardware parts, facilitates the rapid discharge of the tested hardware parts and the multi-angle rotation and inclined hardness testing of the conveyed hardware parts, and improves the accuracy of the hardware part hardness detection and the efficiency of batch hardness detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a three-dimensional structure schematic diagram of the present utility model;

[0016] Figure 2 is a three-dimensional structure schematic diagram of the conveying frame of the present utility model;

[0017] Figure 3 is a front view structure schematic diagram of the L-shaped frame of the present utility model;

[0018] Figure 4 is a front view structure schematic diagram of the flipping frame of the present utility model;

[0019] Figure 5 is a front view sectional structure schematic diagram of the rotating box of the present utility model;

[0020] Figure 6 is a three-dimensional structure schematic diagram of the flipping frame of the present utility model;

[0021] Figure 7 is a three-dimensional structure schematic diagram of the L-shaped frame of the present utility model.

[0022] In the figure: 1. Bottom frame; 2. Rotation axis; 3. L-shaped frame; 4. Fixed seat; 5. Flipping frame; 6. Linkage axis; 7. Sliding frame; 8. Hydraulic cylinder; 9. Pressure sensor body; 10. Transmission block; 11. Detection indenter; 12. Conveyor frame; 13. Stepper motor; 14. Transmission shaft; 15. First wheel; 16. Lower electric push rod; 17. Second wheel; 18. Belt; 19. Limiting arm; 20. First electric push rod; 21. Clamping block; 22. Support seat; 23. Second electric push rod; 24. Third electric push rod; 25. Hinge axis; 26. Lower push block; 27. Rotating box; 28. Rotating frame; 29. Rotating motor; 30. Worm; 31. Worm gear; 32. Remote controller. Specific implementation mode

[0023] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following combines the attached drawings and preferred embodiments to detail the specific implementation mode, structure, features and their effects of the present utility model as follows.

[0024] Please refer to Figure 1-7 , an embodiment provided by the present utility model: A hardness tester for hardware parts, including a bottom frame 1 and an L-shaped frame 3. An L-shaped frame 3 is installed on the outer wall of the bottom frame 1. A flipping frame 5 is arranged outside the top of the L-shaped frame 3. Fixed seats 4 are symmetrically and movably installed on the outer wall of the flipping frame 5, and the fixed seats 4 are all fixedly connected to the L-shaped frame 3. A linkage axis 6 is movably installed at the top of the fixed seat 4, and the fixed seats 4 are all movably connected to the flipping frame 5 through the linkage axis 6. A sliding frame 7 is slidably installed inside the flipping frame 5. A hydraulic cylinder 8 is installed at the center position of the top of the sliding frame 7. The output end of the hydraulic cylinder 8 is installed with a pressure sensor body 9. The bottom end of the pressure sensor body 9 is installed with a transmission block 10. A detection indenter 11 is installed at the center position of the bottom end of the transmission block 10. Conveyor frames 12 are symmetrically installed at the top of the bottom frame 1;

[0025] A stepper motor 13 is installed on the outer wall of the conveyor frame 12 above the bottom frame 1. The stepper motor 13 plays a role of power drive. The output end of the stepper motor 13 is installed with a transmission shaft 14, and both ends of the transmission shaft 14 extend to the surface of the conveyor frame 12. First wheels 15 are sleeved on the outer walls of the transmission shafts 14 on one side of the conveyor frame 12. Second wheels 17 are installed on the side of the conveyor frame 12 far from the first wheels 15. Belts 18 are installed on the outer walls of the first wheels 15, and the belts 18 all extend to the surfaces of the second wheels 17 on the same side;

[0026] On the outer wall of the conveyor frame 12 on one side of the belt 18, first electric push rods 20 are installed. On the output ends of the first electric push rods 20, clamping blocks 21 are installed. On the outer wall of the flipping frame 5 on one side of the sliding frame 7, a third electric push rod 24 is installed, and the output end of the third electric push rod 24 is connected to the sliding frame 7. On the outer wall of the sliding frame 7, limiting arms 19 are symmetrically installed, and the limiting arms 19 are all slidably connected to the flipping frame 5;

[0027] The tester places the hardware parts above the two belts 18 between the two conveyor racks 12. Supported by the conveyor racks 12, the stepper motor 13 is turned on by operating the remote controller 32. The stepper motor 13 drives the transmission shaft 14 to rotate, and the transmission shaft 14 drives the first wheel 15 to rotate. Supported by the second wheel 17, the first wheel 15 drives the belt 18 and the hardware parts above it to move synchronously. The belt 18 conveys the hardware parts above it between the two clamping blocks 21. At this time, the hardware parts are directly above the rotating rack 28. The stepper motor 13 is turned off by operating the remote controller 32, and the stepper motor 13 drives the belt 18 to stop moving. The lower electric push rod 16 is turned on by operating the remote controller 32. Supported by the bottom frame 1, the lower electric push rod 16 drives the lower push block 26 to move, and the lower push block 26 drives the rotating box 27 and the rotating rack 28 to move. The rotating rack 28 moves until it contacts the bottom end of the hardware parts, and the rotating rack 28 drives the hardware parts to be lifted to a horizontal position with the clamping blocks 21. The first electric push rod 20 is turned on by operating the remote controller 32, and the first electric push rod 20 drives the clamping blocks 21 to move. The two clamping blocks 21 clamp the conveyed hardware parts. The hydraulic cylinder 8 is turned on by operating the remote controller 32. The fixed seat 4 supports the flipping frame 5 through the linkage shaft 6. The flipping frame 5 supports the sliding frame 7 in a sliding manner. The sliding frame 7 supports the hydraulic cylinder 8. The hydraulic cylinder 8 drives the pressure sensor body 9 to move, and the pressure sensor body 9 drives the transmission block 10 and the detection indenter 11 to move synchronously. The pressure sensor body 9 is turned on by operating the remote controller 32. The model of the pressure sensor body 9 is MS5837 - worm 30BA. The hydraulic cylinder 8 drives the detection indenter 11 to slowly descend until it contacts the top end of the conveyed hardware parts. At this time, the pressure sensor body 9 transmits the sensed pressure value to an external computer and display screen. At the same time, the tester will observe the damage condition of the appearance of the hardware parts to statistically analyze the pressure value transmitted by the pressure sensor body 9, so as to facilitate the statistical analysis of the pressure - bearing condition of the hardness of each hardware part. When a group of hardware parts is tested, the hydraulic cylinder 8 is turned on in reverse by operating the remote controller 32. The hydraulic cylinder 8 drives the pressure sensor body 9 to move upward, and the pressure sensor body 9 drives the transmission block 10 and the detection indenter 11 to move synchronously. The first electric push rod 20 is turned on in reverse by operating the remote controller 32, and the first electric push rod 20 drives the clamping blocks 21 to move in the reverse direction, changing the conveyed hardware parts from the clamped state to the separated state. At this time, the hardware parts are above the belt 18. The stepper motor 13 is turned on by operating the remote controller 32, and the stepper motor 13 drives the belt 18 to move. The belt 18 drives the hardware parts to move synchronously, conveying the tested hardware parts away. In the same way, it is convenient to perform hardness test processing on another group of hardware parts, facilitating the batch hardness test of the conveyed hardware parts. It realizes the rapid batch conveyance of hardware parts by the hardness tester of hardware parts for hardness testing, shortening the switching time between each group of hardware parts.It facilitates the rapid discharge of the tested hardware, reduces the labor intensity of workers, and improves the efficiency of batch hardness testing of hardware;

[0028] Support seats 22 are installed on the outer walls of the L-shaped frames 3 below the fixed seat 4. The tops of the support seats 22 are movably installed with second electric push rods 23. The output ends of the second electric push rods 23 are movably installed with hinge shafts 25, and the second electric push rods 23 are all movably connected to the flipping frame 5 through the hinge shafts 25;

[0029] A lower push block 26 is slidably installed on the top of the bottom frame 1 below the conveying frame 12. A rotating box 27 is installed on the top of the lower push block 26. A rotating shaft 2 is installed inside the rotating box 27. A rotating frame 28 is installed at the top of the rotating shaft 2;

[0030] By operating the remote controller 32 to turn on the second electric push rod 23, the L-shaped frame 3 supports the second electric push rod 23 movably through the support seat 22. The second electric push rod 23 drives the flipping frame 5 to rotate through the hinge shaft 25. The flipping frame 5 rotates around the linkage shaft 6. The flipping frame 5 drives the hydraulic cylinder 8, the transmission block 10 and the detection indenter 11 to rotate synchronously, so as to rotate the detection indenter 11 to a certain distance from the inclined plane of the hardware. By operating the remote controller 32 to turn on the third electric push rod 24, under the support of the flipping frame 5, the third electric push rod 24 drives the sliding frame 7 to move. The sliding frame 7 drives the limiting arm 19 to slide inside the flipping frame 5, so as to push the detection indenter 11 until it contacts the inclined plane of the hardware, which facilitates the inclined test of the hardware, realizes the convenient inclined adjustment test processing of the hardness tester for the hardware, facilitates the hardness tester to perform multi-angle rotational inclined hardness testing on the conveyed hardware, and increases the range of inclined hardness detection of the hardware;

[0031] An electric push rod 16 is installed at the center of the top of the bottom frame 1 below the lower push block 26, and the output end of the lower electric push rod 16 is connected to the lower push block 26. A rotating motor 29 is installed inside the rotating box 27 above the lower push block 26. The rotating motor 29 plays a role of power drive. The output end of the rotating motor 29 is installed with a worm 30. A worm gear 31 is installed inside the rotating box 27 on one side of the worm 30. The worm gear 31 meshes with the worm 30, and the worm gear 31 is connected to the rotating shaft 2;

[0032] A remote controller 32 is installed on the outer wall of the bottom frame 1 on one side of the L-shaped frame 3, and the output end of the remote controller 32 is electrically connected to the input ends of the third electric push rod 24, the hydraulic cylinder 8, the pressure sensor body 9, the second electric push rod 23, the first electric push rod 20, the stepping motor 13, the rotating motor 29, and the lower electric push rod 16;

[0033] The rotary motor 29 is turned on by operating the remote controller 32. Supported by the rotary box 27, the rotary motor 29 drives the worm 30 to rotate. Under the meshing action of the worm 30 and the worm gear 31, the worm 30 drives the worm gear 31 to rotate. The worm gear 31 drives the rotary frame 28 to rotate synchronously through the rotating shaft 2, and the rotary frame 28 drives the hardware parts above it to rotate synchronously, facilitating its circumferential rotation. The hardness tester for the hardware parts realizes convenient circumferential rotation adjustment of the hardware parts, facilitating the hardness detection of the hardware parts at multiple positions by the tester and improving the accuracy of the hardness detection of the hardware parts.

[0034] Working principle: When in use, connect to an external power supply. First, the tester places the hardware on top of the two belts 18 between the two conveyor racks 12. The stepper motor 13 drives the transmission shaft 14 to rotate. The transmission shaft 14 drives the first wheel 15 to rotate. The first wheel 15 drives the belt 18 and the hardware above it to move synchronously. The belt 18 conveys the hardware above it between the two clamping blocks 21. The lower electric push rod 16 drives the lower push block 26 to move. The lower push block 26 drives the rotating box 27 and the rotating frame 28 to move. The rotating frame 28 moves to contact the bottom end of the hardware. The rotating frame 28 drives the hardware to be lifted to a horizontal position with the clamping blocks 21. The first electric push rod 20 drives the clamping blocks 21 to move. The two clamping blocks 21 clamp the conveyed hardware. The hydraulic cylinder 8 drives the pressure sensor body 9 to move. The pressure sensor body 9 drives the transmission block 10 and the detection probe 11 to move synchronously. The pressure sensor body 9 is turned on by operating the remote controller 32. The model of the pressure sensor body 9 is MS5837 - worm 30BA. The hydraulic cylinder 8 drives the detection probe 11 to slowly descend until it contacts the top end of the conveyed hardware. At this time, the pressure sensor body 9 transmits the sensed pressure value to an external computer and display screen. At the same time, the tester will observe the damage condition of the hardware appearance to statistically analyze the pressure value transmitted by the pressure sensor body 9, so as to facilitate the statistics of the pressure - bearing conditions of the hardness of each hardware. When a group of hardware is tested, the stepper motor 13 drives the belt 18 to move. The belt 18 drives the hardware to move synchronously to convey the tested hardware away. In the same way, it is convenient to perform hardness testing on another group of hardware, and it is convenient to batch - test the hardness of the conveyed hardware. The second electric push rod 23 drives the flipping frame 5 to rotate through the hinge shaft 25. The flipping frame 5 rotates around the linkage shaft 6. The flipping frame 5 drives the hydraulic cylinder 8, the transmission block 10 and the detection probe 11 to rotate synchronously to rotate the detection probe 11 to a certain distance from the inclined plane of the hardware. The third electric push rod 24 drives the sliding frame 7 to move. The sliding frame 7 drives the limiting arm 19 to slide inside the flipping frame 5 to push the detection probe 11 until it contacts the inclined plane of the hardware, so as to facilitate the inclined testing of the hardware. The rotating motor 29 drives the worm 30 to rotate. The worm 30 drives the worm gear 31 to rotate. The worm gear 31 drives the rotating frame 28 to rotate synchronously through the rotating shaft 2. The rotating frame 28 drives the hardware above it to rotate synchronously to facilitate its circumferential rotation, thus completing the use of the hardness tester.

[0035] The above are only the preferred embodiments of the present utility model and do not impose any formal restrictions on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments of equivalent changes within the scope of the technical solution of the present utility model by using the above-disclosed technical content. However, as long as it does not depart from the content of the technical solution of the present utility model, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A hardness tester for hardware, comprising a bottom frame (1) and an L-shaped frame (3), characterized in that: An L-shaped frame (3) is installed on the outer wall of the bottom frame (1), a turning frame (5) is arranged on the outside of the top of the L-shaped frame (3), a fixed seat (4) is symmetrically and movably installed on the outer wall of the turning frame (5), and the fixed seat (4) is fixedly connected to the L-shaped frame (3), a linkage shaft (6) is movably installed on the top of the fixed seat (4), and the fixed seat (4) is movably connected to the turning frame (5) through the linkage shaft (6), a sliding frame (7) is slidably installed inside the turning frame (5), a hydraulic cylinder (8) is installed at the center position of the top of the sliding frame (7), a pressure sensor body (9) is installed at the output end of the hydraulic cylinder (8), a transmission block (10) is installed at the bottom end of the pressure sensor body (9), and a detection pressure head (11) is installed at the center position of the bottom end of the transmission block (10), and a conveying frame (12) is symmetrically installed at the top of the bottom frame (1).

2. A hardness tester for hardware according to claim 1, characterized in that: A stepper motor (13) is mounted on the outer wall of the conveying frame (12) above the bottom frame (1); a transmission shaft (14) is mounted on the output end of the stepper motor (13), and both ends of the transmission shaft (14) extend to the surface of the conveying frame (12); a first wheel (15) is mounted on the outer wall of the transmission shaft (14) on one side of the conveying frame (12); a second wheel (17) is mounted on the side of the conveying frame (12) away from the first wheel (15); a belt (18) is mounted on the outer wall of the first wheel (15), and the belt (18) extends to the surface of the second wheel (17) on the same side.

3. A hardness tester for hardware according to claim 2, characterized in that: A first electric push rod (20) is installed on the outer wall of the conveying frame (12) on one side of the belt (18), and a clamping block (21) is installed on the output end of the first electric push rod (20).

4. A hardness tester for hardware according to claim 1, characterized in that: A third electric push rod (24) is installed on the outer wall of the flip frame (5) on one side of the sliding frame (7), and the output end of the third electric push rod (24) is connected to the sliding frame (7). Limiting arms (19) are symmetrically installed on the outer wall of the sliding frame (7), and the limiting arms (19) are all slidably connected to the flip frame (5).

5. A hardness tester for hardware according to claim 1, characterized in that: A support seat (22) is installed on the outer wall of the L-shaped frame (3) below the fixed seat (4), a second electric push rod (23) is movably installed on the top of the support seat (22), an articulated shaft (25) is movably installed on the output end of the second electric push rod (23), and the second electric push rod (23) is movably connected to the flip frame (5) through the articulated shaft (25).

6. A hardness tester for hardware according to claim 1, characterized in that: A push-down block (26) is slidably mounted on the top of the bottom frame (1) below the conveying frame (12), a rotating box (27) is mounted on the top of the push-down block (26), a rotating shaft (2) is mounted inside the rotating box (27), and a rotating frame (28) is mounted on the top of the rotating shaft (2).

7. A hardness tester for hardware according to claim 6, characterized in that: A lower electric push rod (16) is installed at the center position of the top end of the bottom frame (1) below the push-down block (26), and the output end of the lower electric push rod (16) is connected to the push-down block (26). A rotating motor (29) is installed inside a rotating box (27) above the push-down block (26), and a worm (30) is installed at the output end of the rotating motor (29). A worm wheel (31) is installed inside the rotating box (27) on one side of the worm (30), and the worm wheel (31) is meshed with the worm (30), and the worm wheel (31) is connected to the rotating shaft (2).

8. A hardness tester for hardware according to claim 1, characterized in that: A remote controller (32) is installed on the outer wall of the bottom frame (1) on one side of the L-shaped frame (3), and the output end of the remote controller (32) is electrically connected to the input ends of the third electric push rod (24), the hydraulic cylinder (8), the pressure sensor body (9), the second electric push rod (23), the first electric push rod (20), the stepping motor (13), the rotary motor (29), and the lower electric push rod (16).

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