Intelligent low-voltage switchgear assembly

Abstract

The invention relates to an intelligent low-voltage switchgear assembly which comprises an equipment shell and a protective door, the protective door is rotatably mounted on the front side of the equipment shell, a screw is fixedly mounted in the equipment shell, a plurality of adjusting frames are arranged on the front side of the screw through mounting parts, and the mounting parts are used for mounting and dismounting the adjusting frames. A clamping plate is fixedly installed on the inner side of the adjusting frame through a pressure sensor, a first protection pad is attached to the right side of the clamping plate, and a lead screw is installed in the adjusting frame in a threaded mode. According to the device, the adjustable adjusting frame is arranged, a clamping plate and a pressing plate are arranged to replace a binding belt to clamp and fix a cable, a pressure sensor is arranged to monitor the clamping force in real time, and an alarm is triggered to give an intelligent alarm when the cable is loosened, so that the problem that a traditional cable bundle is bound by adopting the binding belt, so that the cable bundle cannot be damaged is solved. And loosening caused by long-term vibration or temperature change causes signal interference or short circuit risk.

Description

Technical Field

[0001] This application relates to the technical field of switchgear, and in particular to an intelligent low-voltage switchgear assembly. Background Technology

[0002] Switchgear is a complete set of power distribution equipment assembled from primary and secondary equipment according to a certain scheme. It is mainly used to control and protect lines and equipment. It integrates the originally scattered circuit control parts and has the characteristics of small size, convenient installation, high safety, and economic practicality. It can intuitively display the circuit conduction status, protect electrical components and extend their life.

[0003] Intelligent low-voltage switchgear is a type of switchgear and is a core device in the power distribution field that integrates power distribution, control, protection and intelligent management. It is widely used in industrial automation, commercial buildings, new energy power plants and smart grids. Its core function is to realize circuit switching control, fault protection and power quality monitoring through the integration of low-voltage electrical components (such as circuit breakers, contactors and smart meters).

[0004] With the development of IoT, edge computing and digital twin technologies, traditional low-voltage complete sets of equipment are gradually being upgraded to intelligent systems. However, existing products still have the following problems at the mechanical structure level: cable management of traditional equipment relies on manual fixing, which poses a risk of loosening and affects the stability of signal transmission. Summary of the Invention

[0005] To address the issue that existing intelligent low-voltage switchgear relies on manual cable ties for cable management, which poses a risk of loosening and affects signal transmission stability, this application provides an intelligent low-voltage switchgear.

[0006] This application provides an intelligent low-voltage switchgear assembly, which adopts the following technical solution: An intelligent low-voltage switchgear includes an equipment housing and a protective door. The protective door is rotatably mounted on the front side of the equipment housing. A screw is fixedly mounted inside the equipment housing. Several adjusting brackets are set on the front side of the screw via mounting components. The mounting components are used for installing and removing the adjusting brackets. A clamping plate is fixedly mounted on the inner side of the adjusting bracket via a pressure sensor. A protective pad is attached to the right side of the clamping plate. A lead screw is threaded inside the adjusting bracket. The left side of the lead screw extends to the inner side of the adjusting bracket and is rotatably mounted with a pressure plate. The pressure plate is located on the right side of the clamping plate. A second protective pad is attached to the left side of the pressure plate. An alarm is fixedly mounted on the top of the equipment housing.

[0007] Through the coordination between the adjustment frame and its internal structure, after the cable is moved between the clamp and the pressure plate, rotating the screw can drive the pressure plate to move horizontally to the left, bringing it closer to the clamp. This allows the pressure plate to clamp and fix the cable instead of the cable tie. At the same time, a pressure sensor can monitor the force of the cable tie squeezing the clamp in real time. When the cable becomes loose, the control structure triggers an alarm for intelligent alarm, thus solving the problem that traditional cable bundles using cable ties are prone to loosening due to long-term vibration or temperature changes, leading to signal interference or short circuit risks.

[0008] A further improvement of the technical solution of the present invention is as follows: an iron block is fixedly installed inside the adjusting frame on the front side of the clamping plate, a connecting rod is slidably installed inside the adjusting frame on the front side of the pressure plate, the left side of the connecting rod extends to the inside of the adjusting frame and a sliding plate is fixedly installed, a magnetic block is fixedly connected inside the sliding plate, the left side of the magnetic block attracts the iron block, the right side of the connecting rod extends out of the inside of the adjusting frame and a baffle is fixedly installed, and a number of balls are rolled inside the adjusting frame around the connecting rod, the balls are rolledly connected to the outer surface of the connecting rod.

[0009] In the above technical solution, after the cable is held inside the clamp and pressure plate, the magnetic block and the iron block attract each other, causing the slide plate to adhere to the iron block. At this time, the connecting rod can be used to further intercept the cable from the front, reducing the possibility of the cable coming loose and detaching from the inside of the adjustment frame. This provides maintenance time for operators to reinforce the cable in a timely manner. The installation of a baffle can reduce the possibility of the connecting rod coming loose from the inside of the adjustment frame, ensuring that the slide plate can be used normally. Furthermore, the installation of several ball bearings can separate the connecting rod from the inner wall of the adjustment frame. As the connecting rod moves repeatedly along the inside of the adjustment frame, the ball bearings can roll along the surface of the connecting rod, thereby reducing the wear of the adjustment frame and the connecting rod and extending their service life.

[0010] A further improvement of the technical solution of the present invention is that a shielding cover is fixedly installed on the outer surface of the iron block, and the inner wall of the shielding cover is in contact with the outer surface of the slide plate.

[0011] By adopting the above technical solution, the outer perimeter of the slide can be wrapped by installing a shielding cover, thereby shielding the magnetic block and reducing the possibility that the electromagnetic field inside the equipment shell will affect the attraction force of the magnetic block.

[0012] A further improvement of the technical solution of the present invention is that: the mounting component includes a connecting ring, the front side of the connecting ring is fixedly connected to the adjusting frame, a half ring is rotatably mounted on the rear side of the connecting ring via a hinge, a screw is located between the connecting ring and the half ring, a locking block is fixedly mounted on the right side of the half ring, the left side of the locking block is in contact with the connecting ring, a guide plate is fixedly mounted on the right side of the connecting ring at the top of the locking block, a limit block is in contact with the right side of the locking block, and the limit block and the guide plate are slidably connected by a slider.

[0013] By adopting the above technical solution, through the cooperation between the installation components, the front side of the half-ring is rotated to a state of contact with the surface of the connecting ring. At this time, the left side of the locking block is also in contact with the surface of the connecting ring. Under the action of gravity, the limiting block can automatically slide down and move to the right side of the locking block, thereby limiting the locking block. This allows the connecting ring and the half-ring to be quickly installed on the outer surface of the screw, and the adjusting frame is installed. By pushing the limiting block to the top and then rotating the half-ring, the locking block can be separated from the connecting ring, thereby quickly disassembling the adjusting frame and improving work efficiency.

[0014] A further improvement of the technical solution of the present invention is that: an upper rotating block is threadedly installed on the outer surface of the screw at the top of the semi-ring, and a lower rotating block is threadedly connected to the outer surface of the screw at the bottom of the semi-ring.

[0015] The above technical solution utilizes the cooperation between the upper and lower rotating blocks. By rotating the upper and lower rotating blocks along the outer surface of the screw, the height of the connecting ring and the half-ring can be adjusted and limited, thereby adjusting the height of the adjusting frame. This allows for cable positioning at different locations, improving the flexibility of the device.

[0016] A further improvement of the technical solution of the present invention is that: guide blocks are fixedly installed on both the left and right sides of the adjustment frame, the guide blocks are made of rubber material, a fixing rod is fixedly installed inside the equipment shell, and the left and right outer sides of the guide blocks are in contact with the outer surface of the fixing rod.

[0017] In the above technical solution, the guide block and the fixed rod cooperate with each other. The guide block is made of a deformable and resilient rubber material so that it can be snapped onto the outer surface of the fixed rod. This prevents the adjustment frame from rotating horizontally and thus guides and limits the movement trajectory of the adjustment frame.

[0018] A further improvement of the technical solution of the present invention is that: a base plate is fixedly installed on the right side of the connecting ring, and a magnetic suction plate is fixedly connected to the top of the connecting ring; the limiting block is made of iron material, and the top of the magnetic suction plate and the limiting block are attracted to each other.

[0019] By adopting the above technical solution, the magnetic plate and the limiting block attract each other through the mutual attraction effect. After the limiting block moves downward, the magnetic plate can attract each other, thereby further reducing the possibility of the limiting block moving upward and improving the limiting effect on the card block.

[0020] A further improvement of the technical solution of the present invention is that: a fixing plate is fixedly installed on the right side of the adjusting frame, a spring is fixedly connected to the front side of the fixing plate, a clamping plate is fixedly installed on the front side of the spring, a protective pad three is attached to the front side of the clamping plate, and the protective pad three is pressed against the outer surface of the lead screw.

[0021] By adopting the above technical solution, the spring force can generate a rightward push on the clamping plate, causing the protective pad three to press against the surface of the lead screw, thus limiting the lead screw and reducing the possibility of the lead screw rotating, thereby reducing the possibility of the cable loosening and improving the effect of clamping and limiting the cable.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. This invention provides an intelligent low-voltage switchgear. By setting an adjustment frame and its internal structure, rotating the lead screw simultaneously moves the pressure plate closer to the clamping plate, which can replace cable ties to clamp and fix the cable. At the same time, by setting a pressure sensor, the clamping force of the cable tie on the clamping plate can be monitored in real time. When the cable is loose, the control structure triggers an alarm to perform an intelligent alarm, thereby solving the problem that traditional cable bundles are bound with cable ties, which can loosen due to long-term vibration or temperature changes, causing signal interference or short circuit risks.

[0023] 2. This invention provides an intelligent low-voltage switchgear. By using the mutual attraction between the magnetic block and the iron block, after the cable is held on the inside of the clamp and pressure plate, the sliding plate and the iron block are in contact, which can further intercept the cable from the front, thereby reducing the possibility of the cable coming off the inside of the adjustment frame after it becomes loose. This provides the operator with maintenance time so that the operator can reinforce the cable in a timely manner.

[0024] 3. This invention provides an intelligent low-voltage switchgear assembly. By setting up installation components, the regulating frame can be quickly installed and disassembled. Furthermore, by setting up upper and lower rotating blocks, the height of the connecting ring and half-ring can be adjusted and limited, thereby adjusting the height of the regulating frame. This allows for cable limiting at different positions, improving the flexibility of the device.

[0025] 4. This invention provides an intelligent low-voltage switchgear. By setting a spring, a pushing force is generated to the right on the clamping plate, so that the protective pad three is pressed against the surface of the lead screw, reducing the possibility of the lead screw rotating, thereby reducing the possibility of the cable loosening and improving the effect of clamping and limiting the cable. Attached Figure Description

[0026] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the device housing of the present invention; Figure 3 This is a partial structural diagram of the adjustment frame of the present invention; Figure 4 This is a partial cross-sectional structural diagram of the adjustment frame of the present invention; Figure 5 This is a partially exploded cross-sectional view of the adjusting frame of the present invention; Figure 6 This is a schematic diagram of the partially exploded structure of the connecting ring of the present invention; Figure 7 This is a partial structural schematic diagram of the lead screw cross-section of the present invention.

[0027] Explanation of reference numerals in the attached drawings: 1. Equipment casing; 2. Protective door; 3. Alarm; 4. Screw; 5. Adjusting frame; 6. Fixing rod; 7. Guide block; 8. Connecting ring; 9. Half ring; 10. Upper rotating block; 11. Lower rotating block; 12. Pressure sensor; 13. Clamping plate; 14. Pressure plate; 15. Lead screw; 16. Slide plate; 17. Connecting rod; 18. Baffle; 19. Shielding cover; 20. Base plate; 22. Iron block; 23. Ball bearing; 24. Protective pad one; 25. Protective pad two; 26. Spring; 27. Magnetic block; 28. Fixing plate; 29. ​​Locking block; 30. Limiting block; 31. Guide plate; 32. Slider; 33. Magnetic plate; 34. Locking plate; 35. Protective pad three. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0029] Example 1 See Figure 2 , Figure 3 and Figure 4This invention provides an intelligent low-voltage switchgear, including a housing 1 and a protective door 2. The protective door 2 is rotatably mounted on the front side of the housing 1. A screw 4 is fixedly mounted inside the housing 1. Several adjusting brackets 5 are provided on the front side of the screw 4 through an installation component. The installation component is used to install and remove the adjusting brackets 5. A clamping plate 13 is fixedly mounted on the inner side of the adjusting bracket 5 through a pressure sensor 12. A protective pad 24 is attached to the right side of the clamping plate 13. A lead screw 15 is threaded inside the adjusting bracket 5. A pressure plate 14 is rotatably mounted on the left side of the lead screw 15 to the inner side of the adjusting bracket 5. The pressure plate 14 is located to the right of the clamping plate 13. A protective pad 25 is attached to the left side of the pressure plate 14. An alarm 3 is fixedly mounted on the top of the housing 1.

[0030] In this embodiment, through the cooperation between the adjusting frame 5 and its internal structure, after the cable is moved between the clamping plate 13 and the pressure plate 14, the pressure plate 14 can be moved horizontally to the left by rotating the screw 15, so that the pressure plate 14 is close to the clamping plate 13, thereby replacing the cable tie to clamp and fix the cable. At the same time, by setting the pressure sensor 12, the force of the clamping plate 13 being squeezed by the cable tie can be monitored in real time. When the cable is loose, the alarm 3 is triggered by the control structure to perform an intelligent alarm, thereby solving the problem that traditional cable bundles are bound with cable ties, which can loosen due to long-term vibration or temperature changes, causing signal interference or short circuit risks.

[0031] Example 2 See Figure 3 , Figure 4 and Figure 5 Based on Embodiment 1, the present invention provides a technical solution: Preferably, an iron block 22 is fixedly installed inside the adjusting frame 5 on the front side of the clamping plate 13, a connecting rod 17 is slidably installed inside the adjusting frame 5 on the front side of the pressure plate 14, the left side of the connecting rod 17 extends to the inside of the adjusting frame 5 and a sliding plate 16 is fixedly installed, a magnetic block 27 is fixedly connected inside the sliding plate 16, the left side of the magnetic block 27 is attracted to the iron block 22, the right side of the connecting rod 17 extends out of the inside of the adjusting frame 5 and a baffle 18 is fixedly installed, a plurality of balls 23 are rolled inside the adjusting frame 5 around the connecting rod 17, the balls 23 are rolledly connected to the outer surface of the connecting rod 17, a shielding cover 19 is fixedly installed on the outer surface of the iron block 22, and the inner wall of the shielding cover 19 is in contact with the outer surface of the sliding plate 16.

[0032] In this embodiment, after the cable is held inside the clamping plate 13 and the pressure plate 14, the magnetic block 27 and the iron block 22 attract each other, causing the sliding plate 16 to adhere to the iron block 22. At this time, the connecting rod 17 can be used to further intercept the cable from the front, reducing the possibility of the cable coming loose and detaching from the inside of the adjusting frame 5. This provides maintenance time for the operator to reinforce the cable in a timely manner. The installation of the baffle 18 further reduces the possibility of the connecting rod 17 coming loose from the inside of the adjusting frame 5, ensuring normal sliding. The plate 16 is used, and by installing several ball bearings 23, the connecting rod 17 can be separated from the inner wall of the adjusting frame 5. During the process of the connecting rod 17 repeatedly moving along the inside of the adjusting frame 5, the ball bearings 23 can roll along the surface of the connecting rod 17, thereby reducing the wear of the adjusting frame 5 and the connecting rod 17 and extending their service life. Furthermore, by installing the shielding cover 19, the outer periphery of the sliding plate 16 can be wrapped, thereby shielding the magnetic block 27 and reducing the possibility that the electromagnetic field inside the equipment shell 1 will affect the attraction force of the magnetic block 27.

[0033] Example 3 See Figure 4 , Figure 6 and Figure 7 Based on Embodiment 2, the present invention provides a technical solution: Preferably, the mounting component includes a connecting ring 8, the front side of which is fixedly connected to the adjusting frame 5, and a half-ring 9 is rotatably mounted on the rear side of the connecting ring 8 via a hinge. A screw 4 is located between the connecting ring 8 and the half-ring 9. A locking block 29 is fixedly mounted on the right side of the half-ring 9, and the left side of the locking block 29 is in contact with the connecting ring 8. A guide plate 31 is fixedly mounted on the right side of the connecting ring 8 at the top of the locking block 29. A limiting block 30 is attached to the right side of the locking block 29, and the limiting block 30 and the guide plate 31 are slidably connected via a slider 32. An upper rotating block 10 is threadedly mounted on the outer surface of the screw 4 at the top of the half-ring 9, and a lower rotating block 10 is threadedly connected to the outer surface of the screw 4 at the bottom of the half-ring 9. Block 11, guide blocks 7 are fixedly installed on both the left and right sides of the adjusting frame 5. The guide blocks 7 are made of rubber. A fixing rod 6 is fixedly installed inside the equipment shell 1. The left and right outer sides of the guide blocks 7 are in contact with the outer surface of the fixing rod 6. A base plate 20 is fixedly installed on the right side of the connecting ring 8. A magnetic suction plate 33 is fixedly connected to the top of the connecting ring 8. The limiting block 30 is made of iron. The top of the magnetic suction plate 33 is attracted to the limiting block 30. A fixing plate 28 is fixedly installed on the right side of the adjusting frame 5. A spring 26 is fixedly connected to the front side of the fixing plate 28. A clamping plate 34 is fixedly installed on the front side of the spring 26. A protective pad 35 is attached to the front side of the clamping plate 34. The protective pad 35 is pressed against the outer surface of the lead screw 15.

[0034] In this embodiment, through the cooperation between the mounting components, by rotating the front side of the half-ring 9 to a state of contact with the surface of the connecting ring 8, the left side of the locking block 29 also contacts the surface of the connecting ring 8. At this time, under the action of gravity, the limiting block 30 can automatically slide down and move to the right side of the locking block 29, thereby limiting the locking block 29. This allows the connecting ring 8 and the half-ring 9 to be quickly mounted on the outer surface of the screw 4, and the adjusting frame 5 to be installed. By pushing the limiting block 30 to the top and then rotating the half-ring 9, the locking block 29 can be separated from the connecting ring 8, thereby quickly disassembling the adjusting frame 5 and improving work efficiency. Through the cooperation between the upper rotating block 10 and the lower rotating block 11, by moving the upper rotating block 10 and the lower rotating block 11 along the outer surface of the screw 4... The rotating surface allows for adjustment and limiting of the height of the connecting ring 8 and the semi-ring 9, thereby adjusting the height of the adjusting frame 5. This enables cable positioning at different locations, improving the flexibility of the device. The cooperation between the guide block 7 and the fixing rod 6, where the guide block 7 is made of deformable and resilient rubber material to secure it to the outer surface of the fixing rod 6, prevents horizontal rotation of the adjusting frame 5, thus guiding and limiting its movement. Furthermore, the mutual attraction between the magnetic plate 33 and the limiting block 30, after the limiting block 30 moves downwards, allows the magnetic plate 33 to adhere to it, further reducing the likelihood of the limiting block 30 moving upwards and improving the limiting effect on the locking block 29. The spring force of the spring 26 can push the clamping plate 34 to the right, so that the protective pad 35 is pressed against the surface of the lead screw 15, which limits the lead screw 15 and reduces the possibility of the lead screw 15 rotating, thereby reducing the possibility of the cable loosening and improving the effect of clamping and limiting the cable.

[0035] The working principle of this intelligent low-voltage switchgear is explained in detail below.

[0036] like Figures 1-7As shown, depending on the cable fixing position, the operator can align the connecting ring 8 with the outer surface of the screw 4, rotate the front side of the half ring 9 to align with the surface of the connecting ring 8, and simultaneously align the locking block 29 with the surface of the connecting ring 8. The limiting block 30 will automatically slide down and move to the right side of the locking block 29, thereby limiting the locking block 29. At the same time, the limiting block 30 and the magnetic suction plate 33 will attract each other, allowing the adjustment frame 5 to be installed. Then, the cable will be moved to the inside of the clamping plate 13 and the pressure plate 14, the locking plate 34 will be pulled backward, and the screw 15 will be rotated, causing the protective pad 1 24 and the protective pad 25 to press and limit the cable. Then, the locking plate 34 will be released, and the spring 26 will press the locking plate 34, causing the protective pad 3 35 to limit the screw 15. Then, the baffle 18 will be pushed to the left, causing the magnetic suction block 27 and the iron block 22 to attract each other, thereby limiting and protecting the cable from the front.

[0037] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An intelligent low-voltage switchgear assembly, comprising an equipment housing (1) and a protective door (2), wherein the protective door (2) is rotatably mounted on the front side of the equipment housing (1), characterized in that: A screw (4) is fixedly installed inside the housing (1) of the equipment. Several adjustment brackets (5) are provided on the front side of the screw (4) through the installation component. The installation component is used to install and remove the adjustment brackets (5). A clamping plate (13) is fixedly installed on the inner side of the adjustment bracket (5) through the pressure sensor (12). A protective pad (24) is attached to the right side of the clamping plate (13). A lead screw (15) is installed inside the adjustment bracket (5). A pressure plate (14) is rotatably installed on the left side of the lead screw (15) to the inner side of the adjustment bracket (5). The pressure plate (14) is located on the right side of the clamping plate (13). A protective pad (25) is attached to the left side of the pressure plate (14). An alarm (3) is fixedly installed on the top of the housing (1).

2. The intelligent low-voltage switchgear according to claim 1, characterized in that: An iron block (22) is fixedly installed inside the adjusting frame (5) on the front side of the clamping plate (13). A connecting rod (17) is slidably installed inside the adjusting frame (5) on the front side of the pressure plate (14). The left side of the connecting rod (17) extends to the inside of the adjusting frame (5) and a sliding plate (16) is fixedly installed. A magnetic block (27) is fixedly connected inside the sliding plate (16). The left side of the magnetic block (27) is attracted to the iron block (22). The right side of the connecting rod (17) extends out of the interior of the adjusting frame (5) and a baffle (18) is fixedly installed. Several balls (23) are rolled inside the adjusting frame (5) around the connecting rod (17). The balls (23) are rolledly connected to the outer surface of the connecting rod (17).

3. The intelligent low-voltage switchgear according to claim 2, characterized in that: A shield (19) is fixedly installed on the outer surface of the iron block (22), and the inner wall of the shield (19) is in contact with the outer surface of the slide plate (16).

4. The intelligent low-voltage switchgear according to claim 1, characterized in that: The mounting components include a connecting ring (8), the front side of which is fixedly connected to the adjusting frame (5), and a half ring (9) is rotatably mounted on the rear side of the connecting ring (8) via a hinge. The screw (4) is located between the connecting ring (8) and the half ring (9). A locking block (29) is fixedly mounted on the right side of the half ring (9). The left side of the locking block (29) is in contact with the connecting ring (8). A guide plate (31) is fixedly mounted on the right side of the connecting ring (8) at the top of the locking block (29). A limiting block (30) is attached to the right side of the locking block (29). The limiting block (30) and the guide plate (31) are slidably connected by a slider (32).

5. The intelligent low-voltage switchgear according to claim 4, characterized in that: An upper rotating block (10) is threadedly installed on the outer surface of the screw (4) at the top of the semi-ring (9), and a lower rotating block (11) is threadedly connected to the outer surface of the screw (4) at the bottom of the semi-ring (9).

6. The intelligent low-voltage switchgear according to claim 5, characterized in that: Guide blocks (7) are fixedly installed on both the left and right sides of the adjustment frame (5). The guide blocks (7) are made of rubber. A fixing rod (6) is fixedly installed inside the outer shell (1) of the equipment. The left and right outer sides of the guide blocks (7) are in contact with the outer surface of the fixing rod (6).

7. The intelligent low-voltage switchgear according to claim 6, characterized in that: A base plate (20) is fixedly installed on the right side of the connecting ring (8), and a magnetic suction plate (33) is fixedly connected to the top. The limiting block (30) is made of iron material, and the top of the magnetic suction plate (33) is attracted to the limiting block (30).

8. The intelligent low-voltage switchgear according to claim 1, characterized in that: A fixing plate (28) is fixedly installed on the right side of the adjusting frame (5). A spring (26) is fixedly connected to the front side of the fixing plate (28). A clamping plate (34) is fixedly installed on the front side of the spring (26). A protective pad (35) is attached to the front side of the clamping plate (34). The protective pad (35) is pressed against the outer surface of the lead screw (15).

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