Civil air defense door steel multi-station clamping and positioning device

The multi-station clamping and positioning device solves the problem of frequent disassembly caused by single-station clamping, realizes efficient, precise positioning and stable clamping of civil defense door steel, and improves processing quality.

CN223313828UActive Publication Date: 2025-09-09YANTAI GUANGYUAN CIVIL AIR DEFENSE EQUIP CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422594347.5
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-28
Publication Date
2025-09-09
Estimated Expiration
2034-10-28

AI Technical Summary

Technical Problem

In the existing processing of steel for civil air defense doors, single-station clamping leads to frequent disassembly and replacement, affecting processing efficiency and positioning accuracy, making it difficult to ensure processing quality.

Method used

A multi-station clamping and positioning device is adopted, including a leveling component, a clamping component, a clamping component and a positioning rod. Multiple groups of clamping components are used to achieve multi-station collaborative operation. The leveling component is used to ensure the horizontal state, the positioning rod provides a position reference, the clamping component enhances stability, and the driving component achieves flexible adjustment.

Benefits of technology

It improves the continuity and efficiency of the steel processing of civil air defense doors, ensures positioning accuracy and stability, reduces processing errors and improves processing quality.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223313828U_ABST
    Figure CN223313828U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of civil air defense door steel machining and manufacturing, in particular to a civil air defense door steel multi-station clamping and positioning device which comprises a base, a leveling assembly, a clamping assembly, a pressing assembly and a positioning rod. The leveling assembly is installed on the base and used for enabling civil air defense door steel to be in a horizontal state when the civil air defense door steel is clamped and positioned, the number of the clamping assemblies is three, the clamping assemblies are installed on the base and used for clamping the steel, and the pressing assemblies are installed on the clamping assemblies and used for pressing the steel during clamping. And the two positioning rods are vertically and fixedly mounted on the base. The multi-station clamping device has the beneficial effects that multi-station clamping is achieved in the machining process, and therefore the machining efficiency and the machining quality are improved.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present application relates to the technical field of processing and manufacturing of steel materials for civil air defense doors, and in particular to a multi-station clamping and positioning device for steel materials for civil air defense doors. Background Art

[0002] As the entrance and exit door of the people's defense project, the main function of the civil defense door is to protect the safety of personnel and property and prevent the entry of external threats. With the increasing demand for civil defense doors, the efficiency and precision of the steel processing of civil defense doors are also increasing. In the processing and manufacturing of civil defense doors, clamping and positioning have always been the key links in production and processing.

[0003] At present, most of the clamping and positioning devices for civil defense doors on the market are single-station clamping, which fixes or releases the workpiece by opening and closing the clamping mechanism of one station, and uses the clamping of a single station to complete multiple processing steps such as cutting, punching, and welding.

[0004] However, in the single-station clamping state, when the civil defense door steel needs to undergo multiple processing steps, it needs to be frequently disassembled to change the clamping position, which is not only time-consuming and labor-intensive, but also difficult to ensure the accuracy of each positioning, seriously limiting the continuity and efficiency of the processing process, thereby affecting the processing quality of the civil defense door steel. Utility Model Content

[0005] In order to achieve multi-station clamping during the processing, thereby improving processing efficiency and processing quality, the present application provides a multi-station clamping and positioning device for civil defense door steel.

[0006] This application provides a multi-station clamping and positioning device for civil air defense door steel, which adopts the following technical solutions:

[0007] A multi-station clamping and positioning device for steel materials of civil air defense doors, comprising:

[0008] base;

[0009] A leveling assembly, the leveling assembly being mounted on the base and being used to keep the steel material of the civil air defense door in a horizontal state when clamping and positioning;

[0010] Clamping assemblies, the number of which is no less than two, the clamping assemblies being mounted on the base and being used to clamp steel;

[0011] A pressing assembly, the pressing assembly being mounted on the clamping assembly and being used to press the steel material during clamping;

[0012] A positioning rod is vertically and fixedly mounted on the base.

[0013] By adopting the above technical solution, the leveling component can ensure that the civil defense door steel is in a horizontal state when clamping and positioning, reducing the processing error caused by tilting. The positioning rod provides a position reference for the steel, which can be positioned by relying on the positioning rod. The clamping component clamps the steel from multiple stations, and the pressing component presses the steel when clamping, further enhancing the stability of the steel in the clamped state. Through clamping at multiple stations, the clamping position can be flexibly adjusted. There is no need to disassemble the steel and reposition it during adjustment, thereby improving the continuity and efficiency of the processing process.

[0014] Optionally, the clamping assembly includes:

[0015] Slide rails, there are two slide rails, the slide rails are fixedly mounted on the base, and the two slide rails are arranged in parallel;

[0016] Clamping blocks, there are two clamping blocks, the two clamping blocks are symmetrically mounted at both ends of the slide rail, and are slidably connected to the two slide rails;

[0017] A driving assembly is installed on the clamping blocks, and is used to drive the two clamping blocks to move and clamp the steel.

[0018] By adopting the above technical solution, two parallel sliding rails provide a stable sliding track for the clamping block. The clamping block slides freely on the sliding rail, so that the clamping assembly can adapt to civil defense door steels of different sizes. The two clamping blocks are symmetrically arranged and can apply force evenly from both sides when clamping the steel to prevent the steel from tilting or offsetting. The driving assembly can drive the two clamping blocks to move and clamp the steel, providing efficient and precise clamping for the processing of civil defense door steel.

[0019] Optionally, the base is provided with at least two mounting slots, the mounting slots corresponding to the number of the clamping assemblies, and the driving assembly includes:

[0020] a motor, wherein a fixed end of the motor is fixedly mounted on the base;

[0021] a rotating shaft, the rotating shaft being passed through and rotatably mounted on the base, one end of the rotating shaft being fixedly connected to the output end of the motor;

[0022] A gear, the gear being fixedly mounted on the rotating shaft and disposed in the mounting groove;

[0023] Racks, there are two racks and they correspond one to one with the clamping blocks. The two racks are fixedly mounted on the two clamping blocks respectively. The two racks are slidably mounted in the mounting grooves. The two racks are engaged with the gears and are arranged parallel to both sides of the gears.

[0024] By adopting the above technical solution, when clamping the steel, the motor drives the shaft to rotate, and the motor drives the gear to rotate. When the gear rotates, the two racks will move synchronously in opposite directions, thereby driving the two clamping blocks to achieve symmetrical clamping actions. The synchronous and symmetrical clamping method can ensure that the steel is evenly stressed during the clamping process, thereby improving the stability and speed of the clamping.

[0025] Optionally, the leveling assembly includes:

[0026] A clamping platform, the clamping platform is located on the top of the base, and a threaded hole is opened on the clamping platform;

[0027] Adjusting bolts, the number of the adjusting bolts corresponding to the number of the threaded holes, the adjusting bolts passing through and threadedly connected to the base, and the adjusting bolts threadedly connected to the threaded holes;

[0028] A level is fixedly mounted on the clamping platform.

[0029] By adopting the above technical solution, the clamping table provides a platform for placing and clamping steel. By rotating the adjusting bolts, the height and level of the clamping table can be accurately adjusted. The operator can accurately adjust the height of each adjusting bolt according to the instructions of the spirit level to make the clamping table reach the optimal horizontal state. The threaded adjustment method has high precision and stability, and can achieve fine-tuning of the level of the clamping table to ensure that the civil defense door steel is in a completely horizontal state when clamped and positioned.

[0030] Optionally, a groove is provided on the clamping block, and the pressing assembly includes:

[0031] an active arm, the active arm being hinged in the groove;

[0032] A driven arm, the driven arm is fixedly mounted on the active arm, and the driven arm is arranged perpendicular to the active arm;

[0033] A spring, wherein both ends of the spring are fixedly connected to the active arm and the clamping block respectively.

[0034] By adopting the above technical solution, when the clamping block clamps the steel, the active arm rotates rapidly under the thrust of the steel, and the spring is compressed, driving the driven arm to quickly press against the surface of the steel, preventing the steel from accidentally shifting during processing and improving the positioning accuracy of the equipment.

[0035] Optionally, protrusions are fixedly mounted on both ends of the active arm and the driven arm that are away from each other.

[0036] By adopting the above technical solution, the protrusions increase the surface area of ​​the active arm and the driven arm in contact with the steel, so that the pressing force can be more evenly distributed on the surface of the steel, maintaining a continuous pressing state on the steel.

[0037] Optionally, a rubber pad is fixedly mounted on the protrusion.

[0038] By adopting the above technical solution, when the protrusion contacts the steel, the rubber pad can play a buffering role, preventing the protrusion from directly scratching the steel surface and causing scratches on the steel surface, thereby effectively protecting the steel surface from damage.

[0039] Optionally, a controller is fixedly mounted on the base, and the controller is electrically connected to the motor.

[0040] By adopting the above technical solution, the controller can accurately adjust the output power and speed of the motor, thereby achieving precise control of the clamping force and movement speed of the clamping block. At the same time, the controller can flexibly adjust the clamping position according to different processing requirements without disassembling the steel, realizing clamping at different workstations, thereby improving processing efficiency.

[0041] In summary, this application includes at least one of the following beneficial technical effects:

[0042] 1. By setting up multiple sets of clamping components and driving components, multi-station clamping is achieved, and the clamping position can be flexibly adjusted. There is no need to dismantle the steel and reposition it during adjustment, which improves the consistency and efficiency of the processing process;

[0043] 2. By setting the leveling components and positioning rods, the height and level of the clamping table can be accurately adjusted, which improves the positioning accuracy of the civil air defense door steel during clamping;

[0044] 3. By setting up the clamping component, the steel can be quickly compressed during clamping to prevent the steel from accidentally shifting during processing and improve the stability of clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural diagram of an embodiment of the present application;

[0046] Figure 2 is a transverse cross-sectional view of an embodiment of the present application;

[0047] Figure 3 This is an embodiment of the present application Figure 3 A magnified view of point A;

[0048] Figure 4 is a longitudinal cross-sectional view of an embodiment of the present application;

[0049] Figure 5 This is an embodiment of the present application Figure 4 Enlarged view of point B.

[0050] Description of reference numerals:

[0051] 1. Base; 11. Mounting slot; 2. Leveling assembly; 21. Clamping table; 22. Adjusting bolt; 23. Level; 3. Clamping assembly; 31. Slide rail; 32. Clamping block; 321. Groove; 33. Drive assembly; 331. Motor; 332. Rotating shaft; 333. Gear; 334. Rack; 4. Clamping assembly; 41. Active arm; 42. Driven arm; 43. Spring; 5. Positioning rod; 6. Protrusion; 7. Rubber pad; 8. Controller. DETAILED DESCRIPTION

[0052] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0053] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0054] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0055] The following is combined with Figure 1-5 This application is described in further detail.

[0056] The embodiment of the present application discloses a multi-station clamping and positioning device for steel materials of civil air defense doors.

[0057] Reference Figure 1The multi-station clamping and positioning device for civil air defense door steel includes a base 1, a leveling assembly 2, a clamping assembly 3, a pressing assembly 4, and a positioning rod 5. The leveling assembly 2 is installed on the base 1 and is used to keep the civil air defense door steel in a horizontal state when clamping and positioning. There are three groups of clamping assemblies 3, which are installed on the base 1 and are used to clamp the steel. The pressing assembly 4 is installed on the clamping assembly 3 and is used to press the steel when clamping. The two positioning rods 5 are vertically and fixedly installed on the base 1.

[0058] When in use, the civil defense door steel is placed in the clamping area on the base 1, the steel is made to reach a horizontal state through the leveling component 2, and is precisely positioned through the positioning rod 5 to provide an accurate benchmark for subsequent processing procedures. The clamping component 3 is started to clamp the steel. During the clamping process, the clamping component 4 further presses the steel. When different processing procedures are required at different clamping positions, such as cutting, punching, welding, etc., three groups of clamping components 3 can be used to work simultaneously. Each clamping component 3 can independently clamp and position, realizing multi-station collaborative operation and improving processing efficiency and continuity.

[0059] Reference Figure 1 and Figure 2 The leveling assembly 2 includes a clamping platform 21, an adjusting bolt 22, and a spirit level 23. The clamping platform 21 is placed horizontally and is located on top of the base 1. The clamping platform 21 is in the shape of a rectangular plate with four threaded holes at its four corners. The adjusting bolts 22 are adapted to the threaded holes and the number corresponds one to one. The adjusting bolts 22 pass through and are threadedly connected to the base 1. The adjusting bolts 22 are threaded into the threaded holes. The spirit level 23 is fixedly mounted on the clamping platform 21.

[0060] When in use, the civil air defense door steel is placed on the clamping table 21, and the clamping table 21 provides a stable support plane for the steel. At this time, observe the spirit level 23. The spirit level 23 can intuitively display the horizontal state of the clamping table 21 and the steel placed thereon. If the spirit level 23 shows that the clamping table 21 is not in a completely horizontal state, it is necessary to change the position state of the clamping table 21 by rotating the adjustment bolt 22. Constantly observe the reading of the spirit level 23 and adjust each adjustment bolt 22 as needed until the spirit level 23 shows that the clamping table 21 is completely in a horizontal state. At this time, the civil air defense door steel is also in a horizontal position, which provides an accurate benchmark for subsequent clamping, processing and other processes, ensuring accuracy during the processing.

[0061] Reference Figure 2 and Figure 3The clamping assembly 3 includes a slide rail 31, a clamping block 32, and a drive assembly 33. There are two slide rails 31, both of which are fixedly mounted on the base 1 and arranged in parallel. There are two clamping blocks 32, both of which are symmetrically mounted at both ends of the slide rails 31 and are slidably connected to the two slide rails 31. The sliding direction is the installation direction of the slide rail 31. The drive assembly 33 is mounted on the clamping blocks 32 and is used to drive the two clamping blocks 32 to move and clamp the steel.

[0062] The base 1 is provided with three mounting slots 11, which correspond one-to-one to the clamping assembly 3, and the direction in which the mounting slots 11 are opened is parallel to the direction of the slide rail 31. The driving assembly 33 includes a motor 331, a rotating shaft 332, a gear 333, and a rack 334. The fixed end of the motor 331 is fixedly mounted on the base 1, the rotating shaft 332 is vertically arranged, the rotating shaft 332 is passed through and rotatably mounted on the base 1, one end of the rotating shaft 332 is fixedly connected to the output end of the motor 331, the gear 333 is fixedly mounted on the rotating shaft 332, the gear 333 is arranged in the mounting slot 11, there are two racks 334 and they correspond one-to-one to the clamping block 32, the two racks 334 are both slidably mounted in the mounting slot 11 and are arranged parallel to the mounting slot 11, the sliding direction of the rack 334 is consistent with the installation direction of the guide rail, the two racks 334 are respectively fixedly mounted on the two clamping blocks 32, the two racks 334 are both meshed with the gear 333 and are located on both sides of the gear 333.

[0063] During use, when it is necessary to clamp the steel of the civil air defense door, the steel is placed on the clamping platform 21 and the motor 331 is started. The motor 331 drives the rotating shaft 332 to rotate, and the gear 333 rotates with the rotating shaft 332, driving the two racks 334 to slide in the mounting groove 11 in opposite directions, driving the clamping block 32 to move along the slide rail 31. The clamping block 32 gradually clamps the steel under the action of the driving component 33, thereby achieving a firm clamping of the civil air defense door steel. When it is necessary to loosen the steel, the motor 331 reverses and drives the gear 333 to rotate in the opposite direction, so that the rack 334 drives the clamping block 32 to move in the opposite direction along the slide rail 31 to loosen the steel. During the entire processing process, the clamping component 3 can adjust the position of the clamping block 32 at any time according to different processing requirements to ensure that the steel can maintain a stable clamping state in each processing step, providing reliable guarantee for high-quality processing of civil air defense door steel.

[0064] Reference Figure 4 and Figure 5The clamping block 32 is provided with a groove 321. The pressing assembly 4 includes an active arm 41, a passive arm 42, and a spring 43. The active arm 41 is hinged in the groove 321, and the passive arm 42 is fixedly mounted on the active arm 41. The passive arm 42 is arranged perpendicular to the active arm 41. The two ends of the spring 43 are respectively fixedly connected to the active arm 41 and the clamping block 32. The two ends of the active arm 41 and the passive arm 42, which are away from each other, are fixedly mounted with protrusions 6, and a rubber pad 7 is fixedly mounted on the protrusion 6.

[0065] During use, when the clamping assembly 3 clamps the civil defense door steel, as the clamping block 32 approaches, one end of the active arm 41 is slightly squeezed by the steel and begins to rotate around the hinge point. Since the driven arm 42 is fixedly mounted on the active arm 41 and is arranged perpendicular to the active arm 41, the driven arm 42 also rotates accordingly, gradually approaching the upper surface of the steel. When the clamping block 32 completely clamps the steel, the active arm 41 and the driven arm 42 also press the steel. The protrusions 6 installed on the active arm 41 and the driven arm 42 further improve the stability of the pressing and prevent the steel from sliding during processing. The rubber pad 7 on the protrusion 6 can protect the surface of the steel and avoid scratching the steel during the pressing process, providing a stable clamping environment for the processing of the civil defense door steel.

[0066] Reference Figure 1 and Figure 2 A controller 8 is fixedly mounted on the base 1 and is electrically connected to the motor 331. When clamping of the steel material of the civil air defense door is required, the operator issues a command through the controller 8. After receiving the command, the motor 331 starts to operate, driving the clamping assembly 3 to work. During the processing, if the clamping position or clamping force needs to be adjusted, the operator can adjust the motor 331 at any time through the controller 8. The motor 331 used in the embodiment of the present application is a stepper motor 331, which can be self-locking, ensuring the stability of the clamping.

[0067] The implementation principle of a multi-position clamping and positioning device for civil air defense door steel in an embodiment of the present application is as follows: during use, the civil air defense door steel is first adjusted to a horizontal state through the leveling component 2, and the operator rotates the adjustment bolt 22 according to the indication of the spirit level 23 to adjust the height of the clamping platform 21 to ensure that the steel is in a horizontal state. At the same time, the positioning rod 5 provides a clear reference position for the positioning of the steel, providing an accurate benchmark for subsequent processing.

[0068] Secondly, the motor 331 drives the rotating shaft 332 to rotate, driving the gear 333 to rotate, so that the rack 334 engaged with the gear 333 slides in the installation groove 11, and the rack 334 drives the clamping block 32 to slide on the parallel slide rail 31 to achieve clamping of the steel. The operation of the motor 331 can be accurately controlled by the controller 8 to adjust the clamping force and speed.

[0069] The clamping assembly 4 further enhances the stability of the clamping. When the clamping block 32 clamps the steel, the active arm 41 and the driven arm 42 press the steel. The protrusion 6 and the rubber pad 7 increase the contact area and friction while protecting the surface of the steel.

[0070] During the processing, three groups of clamping components 3 can be used to work simultaneously to realize multi-station collaborative operation. The controller 8 is electrically connected to the motor 331 to achieve precise control of the clamping components 3, improve processing efficiency and continuity, and achieve high-precision clamping and positioning of civil defense door steel, providing reliable guarantee for the production of civil defense doors.

[0071] 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. A multi-station clamping and positioning device for steel materials of civil air defense doors, characterized in that: include: Base (1); A leveling component (2), the leveling component (2) being mounted on the base (1), and the leveling component (2) being used to keep the steel material of the civil air defense door in a horizontal state when clamping and positioning; Clamping components (3), the number of the clamping components (3) is not less than two groups, the clamping components (3) are installed on the base (1), and the clamping components (3) are used to clamp steel; A pressing assembly (4), the pressing assembly (4) being mounted on the clamping assembly (3), the pressing assembly (4) being used to press the steel material during clamping; A positioning rod (5), wherein the positioning rod (5) is vertically and fixedly mounted on the base (1).

2. The multi-station clamping and positioning device for civil air defense door steel according to claim 1 is characterized in that: The clamping assembly (3) comprises: Slide rails (31), the number of the slide rails (31) is two, the slide rails (31) are fixedly mounted on the base (1), and the two slide rails (31) are arranged in parallel; A clamping block (32), wherein the number of the clamping blocks (32) is two, and the two clamping blocks (32) are symmetrically mounted at both ends of the slide rail (31) and are slidably connected to the two slide rails (31); A driving assembly (33) is installed on the clamping blocks (32), and the driving assembly (33) is used to drive the two clamping blocks (32) to move and clamp the steel.

3. The multi-station clamping and positioning device for steel materials of civil air defense doors according to claim 2 is characterized in that: The base (1) is provided with at least two mounting slots (11), the mounting slots (11) corresponding to the number of the clamping assemblies (3) in a one-to-one manner, and the driving assembly (33) comprises: A motor (331), wherein a fixed end of the motor (331) is fixedly mounted on the base (1); A rotating shaft (332), the rotating shaft (332) is passed through and rotatably mounted on the base (1), and one end of the rotating shaft (332) is fixedly connected to the output end of the motor (331); a gear (333), the gear (333) being fixedly mounted on the rotating shaft (332), and the gear (333) being disposed in the mounting groove (11); Racks (334), there are two racks (334) and they correspond one to one with the clamping blocks (32), the two racks (334) are fixedly mounted on the two clamping blocks (32), the two racks (334) are slidably mounted in the mounting groove (11), and the two racks (334) are engaged with the gear (333) and are arranged parallel to both sides of the gear (333).

4. The multi-station clamping and positioning device for steel materials of civil air defense doors according to claim 1 is characterized in that: The leveling assembly (2) comprises: A clamping platform (21), the clamping platform (21) is located on the top of the base (1), and a threaded hole is provided on the clamping platform (21); Adjusting bolts (22), the number of the adjusting bolts (22) corresponding to the number of the threaded holes, the adjusting bolts (22) passing through and being threadedly connected to the base (1), and the adjusting bolts (22) being threadedly connected in the threaded holes; A level (23), wherein the level (23) is fixedly mounted on the clamping platform (21).

5. The multi-station clamping and positioning device for steel materials of civil air defense doors according to claim 3 is characterized in that: The clamping block (32) is provided with a groove (321), and the pressing assembly (4) comprises: An active arm (41), the active arm (41) being hinged in the groove (321); A driven arm (42), the driven arm (42) being fixedly mounted on the active arm (41), the driven arm (42) being arranged perpendicular to the active arm (41); A spring (43), wherein both ends of the spring (43) are fixedly connected to the active arm (41) and the clamping block (32) respectively.

6. The multi-station clamping and positioning device for civil air defense door steel according to claim 5 is characterized in that: Protrusions (6) are fixedly mounted on both ends of the active arm (41) and the driven arm (42) that are away from each other.

7. The multi-station clamping and positioning device for steel materials of civil air defense doors according to claim 6 is characterized in that: A rubber pad (7) is fixedly mounted on the protrusion (6).

8. The multi-station clamping and positioning device for civil air defense door steel according to claim 3 is characterized in that: A controller (8) is fixedly mounted on the base (1), and the controller (8) is electrically connected to the motor (331).