Building mortar consistency detection device

Abstract

Belonging to the technical field of mortar consistency detection equipment, the invention discloses a building mortar consistency detection device, which comprises a conical material container, a conical detection nail, a display screen, a central controller, a support column, a balance support, a lifting fixing device, a magnetic support structure, a descent rate detection device and an automatic clamping cleaning structure. In order to solve the problem that the detection result of the current detection equipment is not accurate enough, the invention provides the building mortar consistency detection device, the contact friction between the sliding rod and the guide rail is avoided, the mortar hardening rate is monitored, the detection cone is automatically wrapped and cleaned, and the accuracy of the mortar detection result is effectively improved.

Description

Technical Field

[0001] This invention belongs to the technical field of mortar consistency testing equipment, specifically referring to a building mortar consistency testing device. Background Technology

[0002] Mortar, as the core bonding material in construction engineering, directly determines the strength of masonry, the durability of plaster layer and seismic safety. If the consistency is not up to standard, it will lead to hollowing and cracking, structural instability and even collapse. Therefore, strict testing is necessary to ensure construction quality and building life.

[0003] Current testing equipment has the following shortcomings: 1. Mechanical friction interference: The static friction between the slide bar and the guide rail disturbs the initial velocity of the falling cone, causing the measured depth to deviate from the true consistency; 2. Lack of monitoring of the hardening process: Existing equipment only records the final depth and cannot capture the change of mortar settling acceleration over time, making it difficult to assess the setting and hardening rate; 3. Cone contamination distortion: Residual mortar solidifies on the cone surface to form a hard shell, changing the cone's mass and geometry, significantly affecting the accuracy of subsequent tests. Summary of the Invention

[0004] To address the above issues and overcome the problem of insufficient accuracy in current testing equipment, this invention provides a building mortar consistency testing device. This device avoids contact and friction between the sliding rod and the guide rail, monitors the mortar hardening rate, and automatically wraps and cleans the conical testing nails, effectively improving the accuracy of mortar testing results.

[0005] The technical solution adopted by this invention is as follows: This invention provides a building mortar consistency testing device, comprising a conical material container, a conical testing nail, a display screen, a central controller, a support column, a balance bracket, a lifting and fixing device, a magnetic support structure, a descent rate testing device, and an automatic clamping and cleaning structure. The support column is fixedly mounted on the conical material container. The central controller is fixedly connected to the support column. The display screen is signal-connected to the central controller. The balance bracket is parallel to the support column and perpendicular to the horizontal plane. The conical testing nail is fixedly mounted on the bottom wall of the balance bracket. The lifting and fixing device is fixedly mounted on the support column. The magnetic support structure… The magnetic support structure is fixedly connected to the support column and positioned below the lifting and fixing device. This structure provides support to ensure the conical detection nail remains perpendicular to the ground during its descent, reducing the probability of tilting due to direct mechanical contact and lowering the frictional resistance between the balance bracket and the support structure, thus ensuring the accuracy of the test results. The descent rate detection device is fixedly connected to the lifting and fixing device. The automatic clamping and cleaning structure is in contact with the conical detection nail and positioned below the magnetic support structure. This automatic clamping and cleaning structure both wraps and fixes the conical detection nail after it rises and removes cement from its outer wall.

[0006] Furthermore, the magnetic support structure includes an outer sleeve, an electromagnet, a coil, a strong magnet ring, a permalloy shielding plate, and a prism shell. The prism shell is fixedly connected to the support column, the outer sleeve is fixedly installed inside the prism shell, the strong magnet ring is fixedly installed on the side wall of the outer sleeve, the electromagnet is installed at the center of the strong magnet ring, the coil is wound around the outer wall of the electromagnet, the coil is connected to an external power source, and permalloy shielding plates are provided between the electromagnets at the same horizontal height to guide the magnetic lines of force to close along the shielding layer and reduce lateral leakage.

[0007] Furthermore, a laser emitter array is provided above the balancing support, and a PSD detector array is provided on the top wall of the prism shell. Both the laser emitter array and the PSD detector array are absolutely stationary with respect to the ground. When the balancing support is not tilted, the laser signal emitted by the laser emitter will be captured by the PSD detector. When the balancing support tilts, some PSD detectors will not receive the light signal. The PSD detectors will send an electrical signal to the central controller. The central controller will control the electromagnets in the tilting direction of the balancing support to be energized, and the electromagnets will apply a repulsive force to the balancing support, so that the balancing support remains perpendicular to the ground.

[0008] Furthermore, the PSD detector array is replaced with a laser receiver array.

[0009] Furthermore, the balance support is provided with prism sections, and the tilt angle control accuracy of the prism structure is higher, which improves the stability compared to the cylindrical solution.

[0010] Furthermore, the descent rate detection device includes a mounting plate, a laser signal transmitter, a laser signal receiver, and a signal isolation column. The mounting plate is fixedly connected to the lifting and fixing device. The laser signal transmitter is located at one end of the mounting plate, and the laser signal receiver is located at the other end of the mounting plate. The signal isolation column is fixedly installed on the side wall of the balance support, and multiple sets of signal isolation columns are provided. The laser signal transmitter and laser signal receiver are located on both sides of the signal isolation column. The laser signal transmitter emits a signal, and the laser signal receiver receives a signal. The falling signal isolation column interrupts the signal, and the interval between the interrupted signals is used to calculate the descent rate of the conical detection nail.

[0011] Furthermore, the automatic clamping cleaning structure includes a bevel gear, a conical disc, a limiting disc, a flipping slot, a conical clamping plate, a feedback bracket, and a pressing column. The bevel gear is driven by a motor, which is fixedly connected to the support column. The conical disc meshes with the bevel gear and is engaged on a bracket extending from the side wall of the support column. The limiting disc is fixedly connected to the conical disc. The flipping slot is located on the limiting disc. The conical clamping plate is engaged and rotatably connected to the flipping slot. The pressing column slides vertically within the flipping slot. The feedback bracket is fixedly connected to the conical clamping plate and is in contact with the pressing column. The feedback bracket is pushed upward by the pressing column, causing the conical clamping plate to rotate and adhere tightly to the side wall of the conical detection nail.

[0012] Furthermore, the conical clamping plate is provided with a torsion spring at the engagement point of the flip-up slot, and a spring is provided between the pressing column and the flip-up slot.

[0013] Furthermore, the side wall of the pressing column is provided with a triangular protrusion, the side wall of the flip-out slot is provided with a hidden groove, a triangular limiting block is provided in the hidden groove, a spring is provided between the triangular limiting block and the hidden groove, and a small electromagnet is provided in the hidden groove. When the small electromagnet is energized, it pulls the triangular limiting block into the hidden groove.

[0014] Furthermore, a first friction-reducing collar is provided on the bottom wall of the pressing column, and a second friction-reducing collar is provided below the first friction-reducing collar. The second friction-reducing collar is engaged and rotatably connected with the first friction-reducing collar. A rotating ball is provided on the bottom wall of the first friction-reducing collar, and a sliding groove for the ball is provided on the top wall of the second friction-reducing collar. The bottom wall of the second friction-reducing collar is rough to increase the frictional resistance between the second friction-reducing collar and the conical detection nail.

[0015] Furthermore, the lifting and fixing device includes a screw support plate, a ball screw, a linear bearing, a nut, a lifting plate, a cylinder, and an arc-shaped clamping plate. The screw support plate is fixedly mounted on the support column, the ball screw is engaged and rotated within the screw support plate, the linear bearing is fixedly mounted on the screw support plate, the ball screw is driven by a motor, the nut slides along the ball screw, the lifting plate is fixedly mounted on the nut, the cylinder is mounted on the lifting plate, the arc-shaped clamping plate is mounted on the cylinder, and the lifting plate has small holes for easy movement of the balance bracket. The cylinder is located at both ends of the small holes.

[0016] The building mortar consistency testing device provided in this solution has the following beneficial effects: (1) Relying on magnetic force, the balance support is in a magnetic levitation state inside the outer sleeve, avoiding contact and friction between the outer sleeve and the balance support, and avoiding the impact of frictional resistance on the accuracy of the test results of the conical test nail; (2) When the conical detection nail rises, it exerts pressure on the pressing column, causing the conical clamping plate to flip, thereby achieving the clamping effect of the conical clamping plate on the conical detection nail, thus achieving the effect of automatic clamping of the conical detection nail. Under the drive of the bevel gear, the conical detection nail is further cleaned and polished. (3) Calculate the descent speed of the conical detection nail based on the interval between the laser signal transmitter and the laser signal receiver, and thus measure the hardening rate of the mortar within the same time length. Attached Figure Description

[0017] Figure 1 Right perspective view of a building mortar consistency testing device provided by the present invention; Figure 2 An exploded view of a building mortar consistency testing device provided by the present invention; Figure 3 A left perspective view of a building mortar consistency testing device provided by the present invention; Figure 4 This is a three-dimensional sectional view of the magnetic support structure. Figure 5 A flowchart illustrating the operation of a PSD detector array; Figure 6 A three-dimensional sectional view of the automatic clamping cleaning structure; Figure 7 This is a schematic diagram of the structure of the triangular limiting block in the hidden groove; Figure 8 This is an exploded view of the magnetically supported structure. Figure 9 for Figure 4 A magnified view of part A in the middle; Figure 10 for Figure 3 A magnified view of part B in the middle section; Figure 11 for Figure 7 A magnified view of part C in the middle; Figure 12 This is a three-dimensional view of the lifting and fixing device.

[0018] The components include: 1. Conical material container; 2. Conical detection nail; 3. Display screen; 4. Central controller; 5. Support column; 6. Balance bracket; 7. Lifting and fixing device; 8. Magnetic support structure; 9. Descent rate detection device; 10. Automatic clamping and cleaning structure; 11. External sleeve; 12. Electromagnet; 13. Coil; 14. Strong magnetic ring; 15. Permalloy shielding partition; 16. Prismatic shell; 17. Laser emitter array; 18. PSD detector array; 19. Prismatic segment; 20. Mounting plate; 21. Laser signal. 21. Transmitter 22. Laser signal receiver 23. Signal isolation column 24. Bevel gear 25. Conical disc 26. Limiting disc 27. Flip slot 28. Conical clamping plate 29. Feedback bracket 30. Pressing column 31. Triangular protrusion 32. Hidden groove 33. Triangular limiting block 34. Small electromagnet 35. Drag reduction collar one 36. Drag reduction collar two 37. Screw support plate 38. Ball screw 39. Linear bearing 40. Nut 41. Lifting plate 42. Cylinder 43. Arc-shaped clamping plate.

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] like Figures 1-12As shown, the present invention provides a building mortar consistency testing device, comprising a conical material container 1, a conical testing nail 2, a display screen 3, a central controller 4, a support column 5, a balance bracket 6, a lifting and fixing device 7, a magnetic support structure 8, a descent rate detection device 9, and an automatic clamping and cleaning structure 10. The support column 5 is fixedly mounted on the conical material container 1. The central controller 4 is fixedly connected to the support column 5. The display screen 3 is signal-connected to the central controller 4. The balance bracket 6 is parallel to the support column 5 and perpendicular to the horizontal plane. The conical testing nail 2 is fixedly mounted on the bottom wall of the balance bracket 6. The lifting and fixing device 7 is fixedly mounted on the support column 5. The magnetic support structure 8 is located below the lifting and fixing device 7 and is fixedly connected to the support column 5. The descent rate detection device 9 is fixedly connected to the lifting and fixing device 7. The automatic clamping and cleaning structure 10 is in contact with the conical testing nail 2 and is located below the magnetic support structure 8.

[0023] The magnetic support structure 8 includes an outer sleeve 11, an electromagnet 12, a coil 13, a strong magnet ring 14, a permalloy shielding partition 15, and a prism shell 16. The prism shell 16 is fixedly connected to the support column 5. The outer sleeve 11 is fixedly installed inside the prism shell 16. The strong magnet ring 14 is fixedly installed on the side wall of the outer sleeve 11. The electromagnet 12 is installed at the center of the strong magnet ring 14. The coil 13 is wound around the outer wall of the electromagnet 12. The coil 13 is connected to an external power source. Permalloy shielding partitions 15 are provided between electromagnets 12 at the same horizontal height.

[0024] A laser emitter array 17 is located above the balancing support 6, and a PSD detector array 18 is located on the top wall of the prism shell 16. Both the laser emitter array 17 and the PSD detector array 18 are absolutely stationary with respect to the ground.

[0025] The balance support 6 is provided with a prism segment 19.

[0026] The descent rate detection device 9 includes a mounting plate 20, a laser signal transmitter 21, a laser signal receiver 22, and a signal isolation column 23. The mounting plate 20 is fixedly connected to the lifting and fixing device 7. The laser signal transmitter 21 is located at one end of the mounting plate 20, and the laser signal receiver 22 is located at the other end of the mounting plate 20. The signal isolation column 23 is fixedly installed on the side wall of the balance support 6, and the laser signal transmitter 21 and the laser signal receiver 22 are located on both sides of the signal isolation column 23.

[0027] The automatic clamping cleaning structure 10 includes a bevel gear 24, a conical disc 25, a limiting disc 26, a flipping slot 27, a conical clamping plate 28, a feedback bracket 29, and a pressing column 30. The bevel gear 24 is driven by a motor, which is fixedly connected to the support column 5. The conical disc 25 meshes with the bevel gear 24 and is engaged on a bracket extending from the side wall of the support column 5. The limiting disc 26 is fixedly connected to the conical disc 25. The flipping slot 27 is set on the limiting disc 26. The conical clamping plate 28 is engaged and rotatably connected to the flipping slot 27. The pressing column 30 slides vertically within the flipping slot 27. The feedback bracket 29 is fixedly connected to the conical clamping plate 28 and is in contact with the pressing column 30.

[0028] The conical clamping plate 28 is provided with a torsion spring at the engagement point of the flip-out slot 27, and a spring is provided between the pressing column 30 and the flip-out slot 27.

[0029] The side wall of the pressing column 30 is provided with a triangular protrusion 31, the side wall of the flip slot 27 is provided with a hidden slot 32, a triangular limiting block 33 is provided in the hidden slot 32, a spring is provided between the triangular limiting block 33 and the hidden slot 32, and a small electromagnet 34 is provided in the hidden slot 32.

[0030] The bottom wall of the pressing column 30 is provided with a drag-reducing collar 35, and a drag-reducing collar 36 is provided below the drag-reducing collar 35. The drag-reducing collar 36 is engaged and rotatably connected with the drag-reducing collar 35. The bottom wall of the drag-reducing collar 35 is provided with a ball bearing for engagement and rotation, and the top wall of the drag-reducing collar 36 is provided with a groove for the ball bearing to slide. The bottom wall of the drag-reducing collar 36 is rough.

[0031] The lifting and fixing device 7 includes a screw support plate 37, a ball screw 38, a linear bearing 39, a nut 40, a lifting plate 41, a cylinder 42, and an arc-shaped clamping plate 43. The screw support plate 37 is fixedly mounted on the support column 5. The ball screw 38 is engaged and rotated within the screw support plate 37. The linear bearing 39 is fixedly mounted on the screw support plate 37. The ball screw 38 is driven by a motor. The nut 40 slides along the ball screw 38. The lifting plate 41 is fixedly mounted on the nut 40. The cylinder 42 is mounted on the lifting plate 41. The arc-shaped clamping plate 43 is mounted on the cylinder 42. The lifting plate 41 has small holes, and the cylinder 42 is located at both ends of the small holes.

[0032] In practical use, after pouring the building mortar into the conical container 1, pound the mortar to expel the air in the mortar and ensure that the mortar is compacted. When cylinder 42 retracts, arc-shaped clamp 43 separates from balance bracket 6, and conical detection nail 2 at the bottom of balance bracket 6 moves into the mortar under the action of gravity. When the balance bracket 6 slides down from the small hole on the support plate 41, the prism segment 19 is affected by the electromagnet 12, and the electromagnet 12 in multiple directions applies magnetic force to the balance bracket 6, making it impossible for the balance bracket 6 to lean against the outer sleeve 11. When the balance support 6 tilts due to overcoming part of the magnetic force, the light signal emitted by the laser emitter is blocked by the tilted balance support 6, the PSD detector loses the light signal, and the PSD detector sends a signal to the central controller 4. The central controller 4 releases a larger current to the electromagnet 12 in the tilt direction of the balance support 6, the magnetism of the electromagnet 12 in this area is enhanced, causing the balance support 6 to tilt away from the electromagnet 12, ensuring the vertical design requirement between the balance support 6 and the ground, reducing the frictional resistance encountered by the balance support 6 during the descent, and improving the accuracy of the equipment in detecting mortar consistency. During the descent of the balance support 6, the signal isolation column 23 converts the continuous optical signal between the laser signal transmitter 21 and the laser signal receiver 22 into an optical signal with time intervals. As the depth of the conical detection nail 2 decreases, the time interval between the interruption and reconnection of the laser signal receiver 22 also increases, which allows for the calculation of different hardening rates of mortar within the same time period. After calculation, the relevant vertical lines are displayed on screen 3; After the mortar test is completed, to prevent the mortar from solidifying on the surface of the conical test nail 2 and affecting the accuracy of the next test, the ball screw 38 rotates, the nut 40 descends, and the lifting plate 41 descends, so that the arc-shaped clamp 43 can grasp the balance bracket 6. Then, the cylinder 42 extends, the arc-shaped clamp 43 clamps the balance bracket 6, and the nut 40 rises along the linear bearing 39 to remove the conical test nail 2 from the conical material container 1. After the conical detection nail 2 is raised, the top wall of the conical detection nail 2 contacts the second drag-reducing collar 36. The second drag-reducing collar 36 lifts the first drag-reducing collar 35. Since the pressing column 30 is fixedly set on the top wall of the first drag-reducing collar 35, the pressing column 30 is raised, one end of the feedback bracket 29 is lifted, the conical clamping plate 28 flips, and the triangular protrusion 31 on the side wall of the pressing column 30 is raised and misaligned with the triangular limiting block 33. This allows the triangular limiting block 33 to support the triangular protrusion 31, keeping the position of the pressing column 30 fixed. At this time, the conical clamping plate 28 and the conical detection nail 2 are relatively fixed. The bevel gear 24 rotates, causing the cone disk 25 to rotate, which in turn causes the cone clamping plate 28 to rotate, grinding away the mortar on the surface of the cone detection nail 2.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for testing the consistency of building mortar, comprising a conical container (1), a conical testing nail (2), a display screen (3), a central controller (4), a support column (5), and a balance bracket (6), characterized in that: It also includes a lifting and fixing device (7), a magnetic support structure (8), a descent rate detection device (9), and an automatic clamping and cleaning structure (10). The support column (5) is fixedly installed on the conical material container (1). The central controller (4) is fixedly connected to the support column (5). The display screen (3) is signal-connected to the central controller (4). The balance bracket (6) is parallel to the support column (5) and perpendicular to the horizontal plane. The conical detection nail (2) is fixedly installed on the bottom wall of the balance bracket (6). The lifting and fixing device (7) is fixedly installed on the support column (5). The magnetic support structure (8) is installed below the lifting and fixing device (7) and is fixedly connected to the support column (5). The descent rate detection device (9) is fixedly connected to the lifting and fixing device (7). The automatic clamping and cleaning structure (10) is in contact with the conical detection nail (2) and is installed below the magnetic support structure (8).

2. The building mortar consistency testing device according to claim 1, characterized in that: The automatic clamping cleaning structure (10) includes a bevel gear (24), a conical disc (25), a limiting disc (26), a flipping slot (27), a conical clamping plate (28), a feedback bracket (29), and a pressing column (30). The bevel gear (24) is driven by a motor, which is fixedly connected to the support column (5). The conical disc (25) meshes with the bevel gear (24) and is clamped onto the bracket extending from the side wall of the support column (5). The limiting disc (26) is fixedly connected to the conical disc (25). The rotating slot (27) is set on the limiting plate (26). The conical clamping plate (28) is engaged and rotatably connected with the rotating slot (27). The pressing column (30) slides vertically in the rotating slot (27). The feedback bracket (29) is fixedly connected to the conical clamping plate (28). The feedback bracket (29) and the pressing column (30) are in contact. The conical clamping plate (28) is provided with a torsion spring at the engagement point of the rotating slot (27). A spring is provided between the pressing column (30) and the rotating slot (27).

3. The building mortar consistency testing device according to claim 2, characterized in that: The side wall of the pressing column (30) is provided with a triangular protrusion (31), the side wall of the flip slot (27) is provided with a hidden slot (32), the hidden slot (32) is provided with a triangular limiting block (33), a spring is provided between the triangular limiting block (33) and the hidden slot (32), and a small electromagnet (34) is provided in the hidden slot (32).

4. The building mortar consistency testing device according to claim 3, characterized in that: The bottom wall of the pressing column (30) is provided with a first friction-reducing collar (35), and a second friction-reducing collar (36) is provided below the first friction-reducing collar (35). The second friction-reducing collar (36) is engaged and rotatably connected with the first friction-reducing collar (35). The bottom wall of the first friction-reducing collar (35) is provided with a ball bearing that engages and rotates. The top wall of the second friction-reducing collar (36) is provided with a groove for the ball bearing to slide. The bottom wall of the second friction-reducing collar (36) is rough.

5. The building mortar consistency testing device according to claim 4, characterized in that: The magnetic support structure (8) includes an outer sleeve (11), an electromagnet (12), a coil (13), a strong magnet ring (14), a permalloy shielding partition (15), and a prism shell (16). The prism shell (16) is fixedly connected to the support column (5). The outer sleeve (11) is fixedly installed inside the prism shell (16). The strong magnet ring (14) is fixedly installed on the side wall of the outer sleeve (11). The electromagnet (12) is installed at the center of the strong magnet ring (14). The coil (13) is wound around the outer wall of the electromagnet (12). The coil (13) is connected to an external power source. Permalloy shielding partitions (15) are provided between the electromagnets (12) at the same horizontal height.

6. The building mortar consistency testing device according to claim 5, characterized in that: A laser emitter array (17) is provided above the balance support (6), and a PSD detector array (18) is provided on the top wall of the prism shell (16). Both the laser emitter array (17) and the PSD detector array (18) are absolutely stationary with respect to the ground. A prism segment (19) is provided on the balance support (6).

7. The building mortar consistency testing device according to claim 6, characterized in that: The descent rate detection device (9) includes a mounting plate (20), a laser signal transmitter (21), a laser signal receiver (22), and a signal isolation column (23). The mounting plate (20) is fixedly connected to the lifting and fixing device (7). The laser signal transmitter (21) is located at one end of the mounting plate (20), and the laser signal receiver (22) is located at the other end of the mounting plate (20). The signal isolation column (23) is fixedly located on the side wall of the balance support (6). The laser signal transmitter (21) and the laser signal receiver (22) are located on both sides of the signal isolation column (23).

8. The building mortar consistency testing device according to claim 7, characterized in that: The lifting and fixing device (7) includes a screw support plate (37), a ball screw (38), a linear bearing (39), a nut (40), a lifting plate (41), a cylinder (42), and an arc-shaped clamping plate (43). The screw support plate (37) is fixedly mounted on the support column (5). The ball screw (38) is engaged and rotated within the screw support plate (37). The linear bearing (39) is fixedly mounted on the screw support plate (37). The ball screw (38) is driven by a motor. The nut (40) is engaged and slid along the ball screw (38). The lifting plate (41) is fixedly mounted on the nut (40). The cylinder (42) is mounted on the lifting plate (41). The arc-shaped clamping plate (43) is mounted on the cylinder (42). The lifting plate (41) has small holes, and the cylinder (42) is mounted at both ends of the small holes.

Images