Automatic insulating paint spraying device for wire and cable production
By designing an automatic insulating paint spray device including a cleaning box, a multi-angle paint spray device and a rotating uniform smear mechanism, the problems of uneven painting and poor adhesion during wire and cable spraying are solved, and the insulation performance is significantly improved.
Patent Information
- Application Number
- CN202510145318.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-10
- Publication Date
- 2025-04-11
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
During the spraying process of wires and cables, the prior art can easily lead to uneven spraying and affect the insulation performance. If the cable is not cleaned, the insulation paint will be poorly adhered.
An automatic spraying device for insulating paint for wire and cable production is designed, including a cleaning box, a multi-angle spraying device and a rotary evening mechanism. The device cleans the cable through a cleaning box, and the multi-angle paint spraying device sprays the cable at all angles, and improves the uniformity of the paint surface through a rotating uniform mechanism.
Through the cleaning operation of the cleaning box and the painting technology of the multi-angle paint spraying device, the adhesion and uniformity of the insulating paint are improved, thereby improving the insulation performance of the cable.
Smart Images
Figure CN119793780A_ABST
Abstract
Description
Technical Field
[0001] The invention mainly relates to the technical field of insulating paint spraying, and in particular to an automatic insulating paint spraying device for electric wire and cable production. Background Art
[0002] The main function of insulating varnish is to enhance the insulation performance of wires and cables. Applying insulating varnish on the outside of the conductor of wires and cables can form a continuous and dense insulating layer, effectively isolating the conductor from the external environment or other conductors, and preventing current leakage or short circuit.
[0003] Insulating varnish usually has good moisture resistance. In a humid environment, wires and cables are easily affected by moisture, which can lead to reduced insulation performance and even short circuit. Applying insulating varnish can effectively prevent moisture intrusion, keep the wires and cables dry and insulated. In the production process of wires and cables, insulating varnish is generally sprayed, and the outer surface of the cable or wire is worked through a spraying device.
[0004] The inventor discovered the following defects during the operation of the specific embodiment: During the spraying process of cables and wires, direct spraying is generally used to paint their outer surfaces, which can easily lead to uneven painting and affect the insulation performance of the wires and cables. If the cables are not cleaned before spraying, poor adhesion of the insulating paint may occur.
[0005] It should be noted that the above contents belong to the technical cognition scope of the inventor. Since the technical contents in this field are vast and too complicated, the above contents of this application do not necessarily constitute prior art. Summary of the invention
[0006] 1. Technical problems to be solved by the invention: The present invention provides an automatic insulating varnish spraying device for producing electric wires and cables, which is used to solve the technical problems existing in the above-mentioned background technology.
[0007] 2. Technical solution: In order to achieve the above-mentioned purpose, the technical solution provided by the present invention is: an automatic insulating paint spraying device for wire and cable production, comprising a workbench, a cleaning box is provided on one side of the top of the workbench, a circulating water tank is provided at the bottom of the cleaning box, a protective cover is provided on the rear side of the cleaning box, a multi-angle paint spraying device is provided at one end inside the protective cover, a rotating smearing mechanism is provided on the opposite side of the multi-angle paint spraying device, and traction devices are provided on both sides of the workbench. When the device is working, the cables or wires that need to be sprayed with insulating paint are respectively installed on the traction devices at both ends, and the cables and wires will enter the cleaning box for cleaning under the action of the traction device. After the cleaning is completed, the insulation layer can be better adhered, and then the cleaned cables and wires will enter the subsequent multi-angle paint spraying device for painting. After the multi-angle paint spraying device completes the painting, it will enter the rotating smearing mechanism, which will smear the paint spraying parts to improve the uniformity of the insulating paint spraying, and finally be pulled out by the traction device. The device can pre-clean the cables and wires through the cleaning box to improve the adhesion performance of the insulating paint, and adopts a multi-angle paint spraying device in conjunction with a rotating smearing mechanism for smearing operations, which improves the stability of the insulating paint, thereby improving the insulation performance of the cable.
[0008] Furthermore, the cleaning box includes a cleaning cavity, sealed cavities are symmetrically provided on both sides of the cleaning cavity, a reciprocating slide groove is opened on the top of the cleaning cavity, a telescopic cylinder is provided on one side of the top of the reciprocating slide groove, the end of the telescopic cylinder is connected to the cleaning tube, water pipes are provided on both sides of the cleaning cavity to connect with the circulating water tank, a return pipe is provided at the bottom of the sealed cavity to connect with the circulating water tank, and a cleaning block is provided at the cleaning box and the cable rubber.
[0009] Furthermore, the cleaning block includes an annular mounting block, the outer side of the annular mounting block is provided with threads, a cleaning sponge is bonded inside the annular mounting block, a threaded mounting hole is opened at the intersection of the cleaning box and the cable, and the threaded mounting hole is detachably connected to the annular mounting block.
[0010] Furthermore, the top of the cleaning cylinder is connected to the telescopic cylinder through a movable slider, a cleaning brush is arranged in a ring inside the cleaning cylinder, and a drying fan is provided on the top of the sealed cavity at the discharge end.
[0011] Furthermore, a pull-out groove is opened in the middle of the circulating water tank, and the pull-out groove is slidably connected to the filter plate. The top of the filter plate is a reflux chamber, and the bottom of the filter plate is a cleaning chamber. The reflux pipe is connected to the reflux chamber, and one of the water pipes is connected to the cleaning chamber, and the other is connected to the reflux chamber.
[0012] Furthermore, the multi-angle paint spraying device includes a symmetrically arranged support block, the side of the support block is connected to an annular fixing plate, the side of the annular fixing plate is connected to a ring-arranged spray gun, the rear end of the spray gun is connected to a first lifting block, the rear end of the first lifting block is slidably connected to a first fixed block, a first sliding groove is provided on the side of the first fixed block to match the first lifting block, a first rotating column is provided in the middle of the first sliding groove, and the first rotating column is matched and connected to the first lifting block.
[0013] Furthermore, the rotary smoothing mechanism includes a concave support platform, the top of the concave support platform is connected to an annular track, the inner side of the annular track is rotatably connected to a rotating plate, the outer side of the rotating plate is annularly arranged with rotating rollers, the rear end of the rotating rollers is connected to a second lifting block, the rear end of the first lifting block is slidably connected to a second fixed block, a second sliding groove is provided on the side of the second fixed block to match the second lifting block, a second rotating column is provided in the middle of the second sliding groove, the second rotating column is matched and connected to the second lifting block, a first driving motor is provided on the side of the concave support platform, a first gear is provided in the concave part of the rotating plate, the first driving motor is connected to the second gear, and the first gear is meshed with the second gear.
[0014] Furthermore, curing lamps are symmetrically provided on both sides of the discharge end of the protective cover, and the traction device includes symmetrically arranged concave rotating wheels, the bottom of the concave rotating wheels is connected to a rotating motor, the bottom of the rotating motor is connected to a moving block, the moving block is slidably connected to a moving groove, the moving groove is opened on the workbench, a rotating screw is provided in the moving groove, and the rotating screw is connected to a second drive motor.
[0015] 3. Beneficial effects: Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention has a reasonable design. The cleaning box is used in conjunction with the circulating water tank at the bottom to clean the cables and wires to be painted, which is convenient for improving the adhesion of the subsequent paint surface. A multi-angle painting device is provided, which can simultaneously paint the cables and wires at various angles to improve the uniformity of the paint surface. After the paint surface is sprayed, the outer paint surface is smoothed by a rotating smoothing mechanism to ensure uniform adhesion of the insulating paint.
[0016] The cleaning box of the device is divided into a cleaning cavity and a sealing cavity, which can ensure that the cleaning liquid inside will not flow out, and the cleaning liquid is continuously circulated and filtered to ensure a good cleaning effect at all times. It can achieve a good cleaning effect on the cable in cooperation with the cleaning blocks on both sides.
[0017] It should be noted that the structures not introduced in the present invention are the same as the prior art or can be implemented by using the prior art, and are not described in detail here because they do not involve the design points and improvement directions of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure of the cleaning block of the present invention; Figure 3 It is a schematic diagram of a partial cross-sectional structure of the present invention; Figure 4 It is a schematic diagram of the structure of the rotary smoothing mechanism of the present invention; Figure 5 It is a schematic structural diagram of the multi-angle paint spraying device of the present invention; Figure 6 It is a schematic diagram of the local structure of the present invention.
[0019] Reference numerals: 1. Workbench; 2. Cleaning box; 21. Cleaning cavity; 22. Sealing cavity; 23. Reciprocating slide; 24. Telescopic cylinder; 25. Cleaning cylinder; 26. Water pipe; 27. Reflux pipe; 28. Cleaning block; 281. Annular mounting block; 282. Cleaning sponge; 283. Threaded mounting hole; 3. Circulating water tank; 31. Drawing slot; 32. Filter plate; 33. Reflux chamber; 34. Cleaning chamber; 4. Protective cover; 41. Curing lamp; 5. Multi-angle spraying device; 51. Support block; 52. Annular fixing plate; 53. Jet Gun; 54, first fixed block; 55, first sliding groove; 56, first rotating column; 25, cleaning cylinder; 251, cleaning brush; 252, drying fan; 6, rotating smearing mechanism; 61, concave support platform; 62, circular track; 63, rotating plate; 64, rotating roller; 65, first gear; 66, second fixed block; 67, second sliding groove; 68, second rotating column; 69, first driving motor; 7, traction device; 71, concave rotating wheel; 72, rotating motor; 73, moving groove; 74, second driving motor. DETAILED DESCRIPTION
[0020] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.
[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating orientations or positional relationships are 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "provided with", "provided on" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0024] It should be noted that the structures not introduced in the present invention do not involve the design points and improvement directions of the present invention, and can adopt the existing technologies known to those skilled in the art. Example
[0025] See attached Figure 1-6An automatic insulating paint spraying device for wire and cable production includes a workbench 1, a cleaning box 2 is provided on one side of the top of the workbench 1, a circulating water tank 3 is provided at the bottom of the cleaning box 2, a protective cover 4 is provided on the rear side of the cleaning box 2, a multi-angle paint spraying device 5 is provided at one end of the protective cover 4, a rotating smearing mechanism 6 is provided on the opposite side of the multi-angle paint spraying device 5, and traction devices 7 are provided on both sides of the workbench 1. When the device is working, the cables or wires that need to be sprayed with insulating paint are respectively installed on the traction devices 7 at both ends. Under the action of the traction device 7, the cables and wires will enter the cleaning box 2 for cleaning, and the cleaning result After the bundle is bundled, the insulating layer can be better adhered. Subsequently, the cleaned cables and wires will enter the subsequent multi-angle paint spraying device 5 for painting. After the multi-angle paint spraying device 5 completes the painting, it enters the rotating smearing mechanism 6. The rotating smearing mechanism 6 will smear the paint spraying area to improve the spraying uniformity of the insulating paint. Finally, it is pulled out by the traction device 7. The device can pre-clean the cables and wires through the cleaning box 2 to improve the adhesion performance of the insulating paint, and adopts the multi-angle paint spraying device 5 to cooperate with the rotating smearing mechanism 6 for smearing, which improves the stability of the insulating paint and thus improves the insulation performance of the cable.
[0026] The cleaning box 2 includes a cleaning cavity 21, and sealed cavities 22 are symmetrically arranged on both sides of the cleaning cavity 21. A reciprocating slide 23 is opened on the top of the cleaning cavity 21, and a telescopic cylinder 24 is arranged on one side of the top of the reciprocating slide 23. The end of the telescopic cylinder 24 is connected to a cleaning cylinder 25. Water pipes 26 are arranged on both sides of the cleaning cavity 21 to connect with the circulating water tank 3. A return pipe 27 is arranged at the bottom of the sealed cavity 22 to connect with the circulating water tank 3. A cleaning block 28 is arranged at the cleaning box 2 and the cable rubber. Before the cables and wires are sprayed, they are pulled into the cleaning box 2 from the traction device 7 at the front end, respectively. Enter the sealed cavity 22 and the cleaning cavity 21. A cleaning cylinder 25 is set in the cleaning cavity 21. The cables and wires pass through the cleaning cylinder 25. The telescopic cylinder 24 on the top drives the cleaning cylinder 25 to move back and forth quickly, thereby cleaning the cables and wires. The water pipes 26 on both sides continuously circulate the internal cleaning liquid to ensure a better cleaning effect. During the movement of the cables and wires, if there is too much cleaning liquid inside, it will enter the sealed cavities 22 on both sides, and the excess cleaning liquid will enter the circulating water tank 3 from the reflux pipe 27. The cleaning block 28 can clean and absorb water for the cables.
[0027] The cleaning block 28 includes an annular mounting block 281, the outer side of the annular mounting block 281 is provided with a thread, a cleaning sponge 282 is bonded inside the annular mounting block 281, a threaded mounting hole 283 is opened at the intersection of the cleaning box 2 and the cable, and the threaded mounting hole 283 is detachably connected to the annular mounting block 281. The cleaning sponge 282 on the inside plays a scraping and cleaning role when the cables and wires enter the cleaning box 2, and plays a water absorbing and cleaning role after the cables and wires slide out of the cleaning box 2. Since the cables and wires slide continuously, the annular mounting block 281 is provided. When the cleaning sponge 282 needs to be replaced, the annular mounting block 281 can be screwed out. The top of the cleaning cylinder 25 is connected to the telescopic cylinder 24 through a movable slider. A cleaning brush 251 is arranged in a ring inside the cleaning cylinder 25. A drying fan 252 is provided on the top of the sealing chamber 22 at the discharge end. The cleaning cylinder 25 can quickly reciprocate under the action of the top telescopic cylinder 24, thereby cleaning the outer surface of the cable. The drying fan 252 can quickly dry the cleaned cables and wires to minimize the moisture on their outer surface, which is convenient for subsequent spraying operations.
[0028] A pull-out groove 31 is provided in the middle of the circulating water tank 3, and the pull-out groove 31 is slidably connected to the filter plate 32. The top of the filter plate 32 is a reflux chamber 33, and the bottom of the filter plate 32 is a cleaning chamber 34. The reflux pipe 27 is connected to the reflux chamber 33, and one of the water pipes 26 is connected to the cleaning chamber 34, and the other is connected to the reflux chamber 33. Cleaning liquid is placed in the cleaning chamber 34, and enters the cleaning cavity 21 at the top through the water pipe 26 to cooperate with the cleaning cylinder 25 to clean the cables and wires. The cleaning liquid after cleaning will enter the reflux chamber 33 through the water pipe 26, and the excess liquid in the sealed cavity 22 will also enter the reflux chamber 33 through the reflux pipe 27. The cleaning liquid in the reflux chamber 33 will pass through the filter plate 32 for filtering, and the filtered liquid will enter the cleaning chamber 34 at the bottom again for reuse. The filter plate 32 is configured to be detachable and can be pulled out and replaced after a period of use.
[0029] The multi-angle paint spraying device 5 includes a symmetrically arranged support block 51, the side of the support block 51 is connected to an annular fixing plate 52, the side of the annular fixing plate 52 is connected to an annularly arranged air gun 53, the rear end of the air gun 53 is connected to a first lifting block, the rear end of the first lifting block is slidably connected to a first fixing block 54, the side of the first fixing block 54 is provided with a first sliding groove 55 to match the first lifting block, the middle of the first sliding groove 55 is provided with a first rotating column 56, the first rotating column 56 is matched and connected to the first lifting block, after the cables and wires pass through the middle hole of the annular fixing plate 52, the first rotating column 56 is adjusted to make the air nozzle at the bottom of the air gun 53 have a suitable height from the cable, and multiple air guns 53 perform painting operations when the cable moves, thereby improving the uniformity of the insulating paint.
[0030] The rotary smoothing mechanism 6 includes a concave support platform 61, the top of the concave support platform 61 is connected to an annular track 62, the inner side of the annular track 62 is rotatably connected to a rotating plate 63, a rotating roller 64 is arranged in an annular manner on the outer side of the rotating plate 63, the rear end of the rotating roller 64 is connected to a second lifting block, the rear end of the first lifting block is slidably connected to a second fixed block 66, a second sliding groove 67 is provided on the side of the second fixed block 66 to match the second lifting block, a second rotating column 68 is provided in the middle of the second sliding groove 67, and the second rotating column 68 is matched with the second lifting block, and a first driving column 68 is provided on the side of the concave support platform 61 A first gear 65 is provided in the recessed part of the rotating plate 63. The first driving motor 69 is connected to the second gear. The first gear 65 is meshed with the second gear. When the cable wire is sprayed with insulating paint, the paint surface on its outside is not evenly distributed. Then it enters the rotating smoothing mechanism 6. By adjusting the second rotating column 68, the rotating roller 64 is in contact with the outer surface of the cable. Then the first driving motor 69 starts to work, and the second gear at the end of the rotating shaft rotates to drive the rotating plate 63 to rotate on the annular track 62, so that the multiple rotating rollers on the side continuously rotate around the cable to evenly apply the insulating paint on the cable surface.
[0031] Curing lamps 41 are symmetrically arranged on both sides of the discharge end of the protective cover 4, and the traction device 7 includes symmetrically arranged concave rotating wheels 71, the bottom of the concave rotating wheel 71 is connected to a rotating motor 72, the bottom of the rotating motor 72 is connected to a moving block, the moving block is slidably connected to a moving groove 73, and the moving groove 73 is opened on the workbench 1. A rotating screw is arranged in the moving groove 73, and the rotating screw is connected to a second driving motor 74. The fixed lamp can accelerate the curing of the insulating paint. When the second driving motor 74 is working, it will drive the rotating screw to rotate, and then drive the moving block to move in the opposite or reverse direction in the moving groove 73, so as to be suitable for cable processing operations of different thicknesses. When the rotating motor 72 at the top is working, it will drive the concave rotating wheel 71 at the end to rotate, and then drive the cable to be pulled and moved.
[0032] The above-described embodiments only express a certain implementation mode of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be based on the attached claims.
Claims
1. An automatic insulating paint spraying device for wire and cable production, characterized in that: The invention comprises a workbench (1), wherein a cleaning box (2) is provided on one side of the top of the workbench (1), a circulating water tank (3) is provided on the bottom of the cleaning box (2), a protective cover (4) is provided on the rear side of the cleaning box (2), a multi-angle paint spraying device (5) is provided on one end of the protective cover (4), a rotating smearing mechanism (6) is provided on the opposite side of the multi-angle paint spraying device (5), and traction devices (7) are provided on both sides of the workbench (1).
2. The automatic insulating varnish spraying device for wire and cable production according to claim 1 is characterized in that: The cleaning box (2) comprises a cleaning cavity (21), and sealed cavities (22) are symmetrically arranged on both sides of the cleaning cavity (21). A reciprocating slide groove (23) is opened on the top of the cleaning cavity (21), and a telescopic cylinder (24) is arranged on one side of the top of the reciprocating slide groove (23). The end of the telescopic cylinder (24) is connected to a cleaning cylinder (25). Water pipes (26) are arranged on both sides of the cleaning cavity (21) and are connected to the circulating water tank (3). A return pipe (27) is arranged at the bottom of the sealed cavity (22) and is connected to the circulating water tank (3). A cleaning block (28) is arranged between the cleaning box (2) and the cable rubber.
3. The automatic insulating varnish spraying device for wire and cable production according to claim 2 is characterized in that: The cleaning block (28) comprises an annular mounting block (281), the outer side of the annular mounting block (281) is provided with threads, a cleaning sponge (282) is bonded inside the annular mounting block (281), a threaded mounting hole (283) is formed at the intersection of the cleaning box (2) and the cable, and the threaded mounting hole (283) is detachably connected to the annular mounting block (281).
4. The automatic insulating varnish spraying device for wire and cable production according to claim 2 is characterized in that: The top of the cleaning cylinder (25) is connected to the telescopic cylinder (24) via a movable slider, a cleaning brush (251) is arranged in a ring shape inside the cleaning cylinder (25), and a drying fan (252) is provided at the top of the sealed chamber (22) at the discharge end.
5. The automatic insulating varnish spraying device for wire and cable production according to claim 2 is characterized in that: A pull-out groove (31) is provided in the middle of the circulating water tank (3), the pull-out groove (31) is slidably connected to a filter plate (32), the top of the filter plate (32) is a reflux chamber (33), the bottom of the filter plate (32) is a clean chamber (34), the reflux pipe (27) is connected to the reflux chamber (33), one of the water pipes (26) is connected to the clean chamber (34), and the other is connected to the reflux chamber (33).
6. The automatic insulating varnish spraying device for wire and cable production according to claim 1 is characterized in that: The multi-angle painting device (5) comprises a symmetrically arranged support block (51), the side of the support block (51) is connected to an annular fixing plate (52), the side of the annular fixing plate (52) is connected to an annularly arranged air gun (53), the rear end of the air gun (53) is connected to a first lifting block, the rear end of the first lifting block is slidably connected to a first fixing block (54), the side of the first fixing block (54) is provided with a first sliding groove (55) matching with the first lifting block, the middle of the first sliding groove (55) is provided with a first rotating column (56), and the first rotating column (56) is matched and connected to the first lifting block.
7. The automatic insulating varnish spraying device for wire and cable production according to claim 1 is characterized in that: The rotary smoothing mechanism (6) comprises a concave support platform (61), the top of the concave support platform (61) is connected to an annular track (62), the inner side of the annular track (62) is rotatably connected to a rotating plate (63), a rotating roller (64) is arranged in an annular manner on the outer side of the rotating plate (63), the rear end of the rotating roller (64) is connected to a second lifting block, the rear end of the first lifting block is slidably connected to a second fixed block (66), a second sliding groove (67) is provided on the side of the second fixed block (66) to match the second lifting block, a second rotating column (68) is provided in the middle of the second sliding groove (67), and the second rotating column (68) is matched and connected to the second lifting block, a first driving motor (69) is provided on the side of the concave support platform (61), a first gear (65) is provided at the inner concave part of the rotating plate (63), the first driving motor (69) is connected to the second gear, and the first gear (65) is meshed with the second gear.
8. The automatic insulating varnish spraying device for wire and cable production according to claim 1 is characterized by: Curing lamps (41) are symmetrically arranged on both sides of the discharge end of the protective cover (4), and the traction device (7) comprises symmetrically arranged concave rotating wheels (71), the bottom of the concave rotating wheels (71) is connected to a rotating motor (72), the bottom of the rotating motor (72) is connected to a moving block, the moving block is slidably connected to a moving groove (73), the moving groove (73) is opened on the workbench (1), a rotating screw is arranged in the moving groove (73), and the rotating screw is connected to a second drive motor (74).