Electromagnetic clutch device

Abstract

The utility model discloses an electromagnetic clutch device, which relates to the technical field of transmission and comprises a main shaft, a transmission part, an electromagnetic driving unit, a reset elastic part and a jaw disc. The transmission part is arranged on the main shaft in a sleeving mode, fixedly connected with the main shaft in the axial direction and rotationally connected with the main shaft in the circumferential direction. The jaw disc is arranged on the main shaft in a sleeving mode, located on one side of the transmission piece, movably connected with the main shaft in the axial direction and fixedly connected with the main shaft in the circumferential direction. And the transmission piece and the jaw disc are respectively provided with jaw tooth parts which are meshed with each other. And the electromagnetic driving unit is sleeved on the main shaft and is used for driving the jaw disc to be close to the transmission piece, so that the jaw tooth parts are meshed. The reset elastic piece is installed between the transmission piece and the jaw disc and drives the jaw disc to move away from the transmission piece. The device is simple in structure and compact in layout, the size is optimized, and the manufacturing cost and the maintenance difficulty are reduced. In addition, the tooth part of the jaw is integrated on the transmission part, so that the part cost and the assembly cost are reduced, and the manufacturing cost is further reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transmission, in particular to an electromagnetic clutch device. BACKGROUND

[0002] In traditional power transmission systems, the engagement and disengagement of clutches usually rely on the operation of mechanical structures or hydraulic systems. However, these traditional methods have certain limitations in response speed, control accuracy, and maintenance cost. Especially in application scenarios that require frequent switching of power transmission states, such as automobile transmission systems, power distribution in automated production lines, etc., the performance of traditional clutches often cannot meet the efficient, fast, and reliable power transmission requirements.

[0003] In order to solve the above problems, electromagnetic clutches have emerged. Electromagnetic clutches use electromagnetic principles to achieve the rapid engagement and disengagement of clutches by controlling the power-on and power-off of electromagnetic coils.

[0004] The toothed electromagnetic clutch is a kind of electromagnetic clutch that realizes power transmission and disconnection by driving the axial movement of the toothed disc. The existing toothed electromagnetic clutch still has deficiencies in design: the structure is relatively complex, the volume is large, which increases the manufacturing cost and maintenance difficulty. CONTENT OF THE INVENTION

[0005] Therefore, the purpose of the present application is to provide an electromagnetic clutch device to solve the technical problems of existing toothed electromagnetic clutches, such as complex structure, large volume, high manufacturing cost, and difficult maintenance.

[0006] To achieve the above technical purpose, the present application provides an electromagnetic clutch device, which comprises a main shaft, a transmission member, an electromagnetic driving unit, a reset elastic member, and a toothed disc.

[0007] The transmission member is sleeved on the main shaft;

[0008] The transmission member is fixedly connected with the main shaft in the axial direction of the main shaft, and is rotatably connected with the main shaft in the circumferential direction of the main shaft;

[0009] The toothed disc is sleeved on the main shaft and located on one side of the transmission member;

[0010] The toothed disc is movably connected with the main shaft in the axial direction of the main shaft, and is fixedly connected with the main shaft in the circumferential direction of the main shaft;

[0011] One side of the transmission member facing the toothed disc is provided with a first toothed gear part;

[0012] One side of the toothed disc facing the transmission member is provided with a second toothed gear part capable of meshing with the first toothed gear part;

[0013] The electromagnetic driving unit is sleeved on the main shaft and located on the side of the tooth disc away from the transmission member;

[0014] The electromagnetic driving unit is used to drive the tooth disc to move towards the transmission member so that the first tooth gear part and the second tooth gear part are engaged;

[0015] The reset elastic member is installed between the transmission member and the tooth disc and is used to drive the tooth disc to move away from the transmission member.

[0016] Further, the transmission member is a belt wheel.

[0017] Further, the inner circumferential surface of the transmission member is provided with a recess for installing a bearing member;

[0018] The bearing member is transitionally assembled on the main shaft;

[0019] The main shaft is provided with a limiting step part for stopping the movement of the bearing member towards the tooth disc;

[0020] The main shaft is further provided with a first limiting member for stopping the movement of the bearing member away from the tooth disc.

[0021] Further, a cavity is formed between the first tooth gear part and one side of the transmission member;

[0022] The reset elastic member is installed in the cavity.

[0023] Further, a fixing seat is further included;

[0024] The fixing seat is sleeved on the main shaft and located in the cavity;

[0025] The bearing member is in contact with the fixing seat;

[0026] The limiting step part is in contact with the fixing seat;

[0027] The reset elastic member is installed between the fixing seat and the tooth disc.

[0028] Further, the reset elastic member is a compression spring;

[0029] The fixing seat is provided with a first positioning structure for sleeving one end of the compression spring;

[0030] The tooth disc is provided with a second positioning structure for sleeving the other end of the compression spring.

[0031] Further, the electromagnetic driving unit includes a coil assembly and a push ring assembly;

[0032] The coil assembly comprises a shell and a coil module;

[0033] The shell is provided with a mounting cavity;

[0034] The coil module is mounted in the mounting cavity;

[0035] The push ring assembly is mounted on the main shaft and located in the inner ring of the shell;

[0036] The coil module is used to generate electromagnetic force when energized to drive the push ring assembly to move the tooth disc towards the transmission member.

[0037] Further, the push ring assembly comprises an inner ring and an outer ring;

[0038] The inner ring is movably mounted on the main shaft;

[0039] The outer ring is fixedly mounted on the outer ring and is used to push the inner ring to press the tooth disc against the transmission member when the coil module is energized, so that the first tooth gear part and the second tooth gear part are engaged.

[0040] Further, the main shaft is provided with a second limiting member;

[0041] The second limiting member is used to limit the movement displacement of the inner ring away from the transmission member.

[0042] Further, the shell comprises a shell cover and a shell body;

[0043] The shell cover and the shell body are connected together by edge pressing and form the mounting cavity therebetween;

[0044] The shell cover and / or the shell body is provided with a wiring hole communicating with the mounting cavity;

[0045] The wiring hole is provided with a wire plug;

[0046] The mounting cavity is further filled with an insulating and heat-conducting material.

[0047] From the above technical solutions, the electromagnetic clutch device designed by the present application has the following beneficial effects:

[0048] 1. The transmission member, tooth disc and driving unit are sequentially mounted on the main shaft, and the reset elastic member is arranged between the transmission member and the tooth disc, so that the overall structure is simple and compact, the volume is optimized, and the manufacturing cost and maintenance difficulty are reduced.

[0049] 2. The first toothed part is integrated on the transmission member, without additional parts to cooperate with the toothed disc, so that the overall structure is more compact, reducing the cost of parts and assembly, and further reducing the manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor.

[0051] Figure 1 It is a perspective view of an electromagnetic clutch device provided in the present application.

[0052] Figure 2 It is a whole sectional view of an electromagnetic clutch device provided in the present application.

[0053] Figure 3 It is a partial sectional view of an electromagnetic clutch device provided in the present application.

[0054] Figure 4 It is an exploded schematic view of an electromagnetic clutch device provided in the present application.

[0055] Figure 5 It is a schematic view of a combined state of an electromagnetic clutch device provided in the present application.

[0056] Figure 6 It is a schematic view of a disconnected state of an electromagnetic clutch device provided in the present application.

[0057] In the figure: 1, electromagnetic drive unit; 11, shell cover; 12, shell; 13, coil module; 14, connecting piece; 15, insulating heat-conducting material; 16, wire plug; 21, push ring outer ring; 22, push ring inner ring; 31, toothed disc; 32, reset elastic member; 33, fixed seat; 41, transmission member; 42, bearing member; 43, first limiting member; 44, second limiting member; 5, main shaft; 51, limiting step part. DETAILED DESCRIPTION

[0058] The technical solutions of the embodiments of the present application will be described in detail below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0059] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0060] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be replaceably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0061] The embodiments of the present application disclose an electromagnetic clutch device.

[0062] Please refer to Figure 1 An embodiment of the electromagnetic clutch device provided in the embodiments of the present application includes:

[0063] The main shaft 5, the transmission member 41, the electromagnetic drive unit 1, the reset elastic member 32 and the cog disc 31.

[0064] The transmission member 41 is sleeved on the main shaft 5; the transmission member 41 is fixedly connected with the main shaft 5 in the axial direction of the main shaft 5, and is rotatably connected with the main shaft 5 in the circumferential direction of the main shaft 5. It can be understood that the transmission member 41 can rotate relative to the main shaft 5 (differential rotation), but will not be offset in the axial direction.

[0065] The cog disc 31 is sleeved on the main shaft 5 and located on one side of the transmission member 41; the cog disc 31 is movably connected with the main shaft 5 in the axial direction of the main shaft 5, and is fixedly connected with the main shaft 5 in the circumferential direction of the main shaft 5 (which can be achieved by spline engagement). It can be understood that the cog disc 31 can rotate synchronously with the main shaft 5 (fixed connection), and can move in the axial direction.

[0066] One side of the transmission member 41 facing the cog disc 31 is provided with a first cog tooth part; one side of the cog disc 31 facing the transmission member 41 is provided with a second cog tooth part which can be engaged with the first cog tooth part.

[0067] The electromagnetic drive unit 1 is mounted on the spindle 5 and is located on the side of the toothed disc 31 away from the transmission member 41. The electromagnetic drive unit 1 is used to drive the toothed disc 31 to move closer to the transmission member 41 so that the first toothed part meshes with the second toothed part (that is, the toothed disc 31 meshes with the transmission member 41).

[0068] The reset elastic element 32 is installed between the transmission element 41 and the dental insert 31 to drive the dental insert 31 away from the transmission element 41.

[0069] The electromagnetic clutch device designed in this application has the following beneficial effects:

[0070] 1. The transmission component 41, the toothed disc 31, and the drive unit are sequentially installed on the main shaft 5, and the reset elastic component 32 is set between the transmission component 41 and the toothed disc 31. The overall structure is simple and compact, which optimizes the volume and reduces the manufacturing cost and maintenance difficulty.

[0071] 2. The first toothed part is integrated into the transmission component 41, eliminating the need for additional parts to cooperate with the toothed disc 31, making the overall structure more compact, reducing component costs and assembly costs, and further reducing manufacturing costs.

[0072] The above is Embodiment 1 of an electromagnetic clutch device provided in this application. The following is Embodiment 2 of an electromagnetic clutch device provided in this application. Please refer to the following for details. Figures 1 to 6 .

[0073] Based on the solution of Embodiment 1 above:

[0074] Furthermore, such as Figure 1 As shown, the transmission component 41 is a pulley. The pulley design allows the electromagnetic clutch device to be easily connected to a power source or other transmission mechanism, improving the device's versatility and flexibility. Transmitting torque through the pulley achieves a smooth and efficient transmission effect. Furthermore, the pulley, as the transmission component 41, has a simple structure and is easy to manufacture, further reducing production costs.

[0075] Furthermore, such as Figure 2 As shown, the inner circumferential surface of the transmission component 41 is provided with a clearance groove for mounting the bearing component 42; the bearing component 42 is transitionally assembled to the main shaft 5; the main shaft 5 is provided with a limiting step 51 for stopping the bearing component 42 from moving towards the toothed disc 31; the main shaft 5 is also provided with a first limiting component 43 for stopping the bearing component 42 from moving away from the toothed disc 31.

[0076] The design of the avoidance groove provides space for the installation of the bearing piece 42, ensuring stable and flexible rotary connection between the transmission member 41 and the main shaft 5. At the same time, the setting of the limiting step part 51 and the first limiting piece 43 effectively limits the axial movement of the bearing piece 42 on the main shaft 5, preventing the bearing piece 42 from falling off or mispositioning, ensuring the reliability and durability of the device. In addition, the use of the bearing piece 42 reduces the friction between the transmission member 41 and the main shaft 5, improving the efficiency and life of the transmission.

[0077] Further, as shown in Figure 2 and Figure 4 , a concave cavity is formed between the first toothed part and one side of the transmission member 41; the reset elastic member 32 is installed in the concave cavity.

[0078] The design of the concave cavity not only provides space for the installation of the reset elastic member 32, but also helps to protect the reset elastic member 32 from external environment, improving the service life and stability of the reset elastic member 32. At the same time, the reset elastic member 32 installed in the concave cavity can more effectively realize the coupling and uncoupling action between the toothed disc 31 and the transmission member 41, ensuring the accuracy and reliability of the coupling and uncoupling.

[0079] Further, as shown in Figure 2 and Figure 4 , it further includes a fixed seat 33; the fixed seat 33 is sleeved on the main shaft 5 and located in the concave cavity; the bearing piece 42 is in contact with the fixed seat 33, and the bearing piece 42 limits the position of the fixed seat 33; the limiting step part 51 is in contact with the fixed seat 33; through the cooperation of the bearing piece 42 and the limiting step part 51, the axial movement of the fixed seat 33 on the main shaft 5 is effectively limited. The reset elastic member 32 is installed between the fixed seat 33 and the toothed disc 31, and the fixed seat 33 provides convenience for the installation of the reset elastic member 32.

[0080] The use of the fixed seat 33 not only further enhances the structural stability of the device, but also provides more reliable support for the installation and positioning of the reset elastic member 32. Through the cooperation of the fixed seat 33 with the bearing piece 42 and the limiting step part 51, it ensures that the reset elastic member 32 can maintain stable elasticity and reset effect in the coupling and uncoupling action, thereby improving the working performance and reliability of the entire electromagnetic clutch device.

[0081] Further, as shown in Figure 2 , the reset elastic member 32 is a compression spring; the fixed seat 33 is provided with a first positioning structure (which can be a protruding structure) for the one end of the compression spring to be sleeved into; the toothed disc 31 is provided with a second positioning structure (which can be a clamping groove structure) for the other end of the compression spring to be sleeved into.

[0082] The use of the compression spring provides a stable elastic force, which continuously pushes the toothed disc 31, ensuring the accuracy and reliability of the engagement and disengagement action between the toothed disc 31 and the transmission member 41. At the same time, the first positioning structure and the second positioning structure are arranged to enable the compression spring to be securely mounted between the fixed seat 33 and the toothed disc 31, preventing the compression spring from falling off or mispositioning during the engagement and disengagement action, further improving the stability and durability of the device.

[0083] Further, as shown in Figure 2 and Figure 3 , for the design of the electromagnetic drive unit 1, the existing structure design can be referred to or followed, specifically including the coil assembly and the push ring assembly;

[0084] The coil assembly includes a housing and a coil module 13; the housing is provided with a mounting cavity; the coil module 13 is mounted in the mounting cavity; the push ring assembly is mounted on the main shaft 5 and located in the inner circle of the housing; the coil module 13 is used to generate electromagnetic force when energized to drive the push ring assembly to move the toothed disc 31 close to the transmission member 41.

[0085] Further, as shown in Figure 2 and Figure 3 , for the design of the push ring assembly, the push ring assembly passes through the housing and is centered by the main shaft 5, specifically including a push ring inner circle 22 and a push ring outer circle 21; the push ring inner circle 22 is movably mounted on the main shaft 5; the push ring outer circle 21 is fixedly mounted on the push ring outer circle 21, and is used to push the push ring inner circle 22 to press the toothed disc 31 against the transmission member 41 when the coil module 13 is energized, so that the first toothed portion and the second toothed portion are engaged.

[0086] Further, as shown in Figure 2 , the main shaft 5 is provided with a second limiting piece 44; the second limiting piece 44 is used to limit the movement displacement of the push ring inner circle 22 away from the transmission member 41.

[0087] The arrangement of the second limiting piece 44 ensures the movement range of the push ring inner circle 22 during the engagement and disengagement action, preventing the structure from being damaged or the engagement and disengagement from failing due to excessive movement of the push ring inner circle 22. By reasonably designing the position of the second limiting piece 44, the movement stroke of the push ring inner circle 22 can be accurately controlled, thereby ensuring the stability and reliability of the engagement and disengagement action of the electromagnetic clutch device.

[0088] The first limiting piece 43 and the second limiting piece 44 of the present application can be a shaft clamp, which is not specifically limited.

[0089] Further, for the design of the housing, as shown in Figure 2 and Figure 3As shown, the shell includes a shell cover 11 and a shell body 12; the shell cover 11 and the shell body 12 are connected together by a press edge connection, and a mounting cavity is formed therebetween. This press edge connection not only has a simple structure and is easy to manufacture, but also provides good sealing performance, preventing external impurities or moisture from entering the mounting cavity and affecting the normal work of the coil module 13. At the same time, a wiring hole is provided on the shell cover 11 and / or the shell body 12 to communicate with the mounting cavity, for avoiding the connecting wires of the coil module 13. A wire plug 16 is installed on the wiring hole, further improving the sealing performance and safety of the device.

[0090] In order to facilitate the installation and fixation of the coil assembly, a connecting piece 14 can be installed on the side of the shell body 12 away from the shell cover 11, so as to facilitate the installation and fixation of the shell body 12 on a fixed carrier such as a case.

[0091] Further, the mounting cavity is also filled with an insulating and heat-conducting material 15 (which can be, for example, glue). The use of the insulating and heat-conducting material 15 not only improves the electrical safety of the device, but also transfers the heat generated by the coil module 13 during work to the outside, improving the heat dissipation effect and avoiding the accumulation of heat affecting the normal work of the coil module 13. By reasonably selecting the type and filling method of the insulating and heat-conducting material 15, the working efficiency and reliability of the electromagnetic clutch device can be effectively improved.

[0092] The working principle of the electromagnetic clutch device designed in the present application is as follows:

[0093] As shown in Figure 6 When the coil module 13 is not working (not powered), the reset elastic member 32 pushes the toothed disc 31 and the push ring assembly back by the elastic force after pre-pressing, and is finally limited by the second limiting member 44 on the main shaft 5.

[0094] As shown in Figure 5 When the coil module 13 is working (powered), under the action of the magnetic field, the push ring outer ring 21 and the shell cover 11 form magnetic poles and attract each other. Since the coil module 13 is fixed on the case and cannot move, only the push ring assembly is allowed to move in the direction of the shell cover 11 under the centering guidance of the main shaft 5, thereby pushing the toothed disc 31 to engage with the transmission member 41, so that the power of the main shaft 5 is transmitted to the toothed disc 31 through the spline engagement, and then transmitted to the transmission member 41 through the engagement of the first toothed gear part and the second toothed gear part. The teeth on the transmission member 41 (taking a belt wheel as an example) transmit the power to the belt, and then the belt transmits the power to the power output end, completing the direct drive of the engine power.

[0095] In summary, the electromagnetic clutch device designed in the application realizes compactness of the overall structure and reduction of manufacturing cost by optimizing the structural design of the transmission member 41, the cogwheel disc 31 and the electromagnetic driving unit 1. Meanwhile, the working performance and reliability of the device are further improved through the detailed design of the avoiding groove, the concave cavity, the fixing seat 33 and the reset elastic member 32. These innovative designs make the electromagnetic clutch device have a wide application prospect and market value in the transmission control field.

[0096] The above describes in detail the electromagnetic clutch device provided by the application. For those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the embodiments of the application. In summary, the content of the specification should not be understood as a limitation of the application.

Claims

1. An electromagnetic clutching device, characterized by The main shaft (5), the transmission member (41), the electromagnetic drive unit (1), the reset elastic member (32) and the cogwheel (31) are included. The transmission member (41) is sleeved on the main shaft (5). The transmission member (41) is fixedly connected with the main shaft (5) in the axial direction of the main shaft (5) and is rotatably connected with the main shaft (5) in the circumferential direction of the main shaft (5). The cogwheel (31) is sleeved on the main shaft (5) and is located on one side of the transmission member (41). The cogwheel (31) is movably connected with the main shaft (5) in the axial direction of the main shaft (5) and is fixedly connected with the main shaft (5) in the circumferential direction of the main shaft (5). One side of the transmission member (41) is provided with a first cogwheel tooth part. One side of the cogwheel (31) is provided with a second cogwheel tooth part capable of engaging with the first cogwheel tooth part. The electromagnetic drive unit (1) is sleeved on the main shaft (5) and is located on the side of the cogwheel (31) away from the transmission member (41). The electromagnetic drive unit (1) is used for driving the cogwheel (31) to move close to the transmission member (41) so that the first cogwheel tooth part and the second cogwheel tooth part are engaged. The reset elastic member (32) is installed between the transmission member (41) and the cogwheel (31) and is used for driving the cogwheel (31) to move away from the transmission member (41).

2. An electromagnetic clutch device according to claim 1, wherein The transmission member (41) is a belt wheel.

3. An electromagnetic clutching device according to claim 1, characterised in that An inner circumferential surface of the transmission member (41) is provided with a recess for installing a bearing member (42). The bearing member (42) is transitionally assembled on the main shaft (5). A limiting step (51) is arranged on the main shaft (5) and is used for stopping the bearing member (42) from moving close to the cogwheel (31). A first limiting member (43) is further installed on the main shaft (5) and is used for stopping the bearing member (42) from moving away from the cogwheel (31).

4. An electromagnetic clutching device according to claim 3, characterised in that A cavity is formed between the first cogwheel tooth part and one side of the transmission member (41). The reset elastic member (32) is installed in the cavity.

5. An electromagnetic clutching device according to claim 4, characterised in that A fixing seat (33) is further included. The fixing seat (33) is sleeved on the main shaft (5) and is located in the cavity. The bearing member (42) is in contact with the fixing seat (33). The limiting step (51) is in contact with the fixing seat (33). The reset elastic member (32) is installed between the fixing seat (33) and the cogwheel (31).

6. An electromagnetic clutching device according to claim 5, characterised in that The reset elastic member (32) is a compression spring. The fixing seat (33) is provided with a first positioning structure for sleeving one end of the compression spring. The cogwheel (31) is provided with a second positioning structure for sleeving the other end of the compression spring.

7. An electromagnetic clutching device according to claim 1, characterised in that The electromagnetic drive unit (1) includes a coil assembly and a push ring assembly. The coil assembly includes a shell and a coil module (13). The shell is provided with an installation cavity. The coil module (13) is installed in the installation cavity. The push ring assembly is mounted on the main shaft (5) and located in the inner ring of the shell; The coil module (13) is used to generate electromagnetic force when energized to drive the push ring assembly to push the tooth disc (31) to move close to the transmission member (41).

8. An electromagnetic clutching device according to claim 7, characterised in that The push ring assembly comprises a push ring inner ring (22) and a push ring outer ring (21); The push ring inner ring (22) is movably mounted on the main shaft (5); The push ring outer ring (21) is fixedly mounted on the push ring outer ring (21) and is used to push the push ring inner ring (22) to press the tooth disc (31) against the transmission member (41) when the coil module (13) is energized, so that the first tooth gear part and the second tooth gear part are engaged.

9. An electromagnetic clutching device according to claim 8, characterised in that The main shaft (5) is provided with a second limiting member (44); The second limiting member (44) is used to limit the movement displacement of the push ring inner ring (22) away from the transmission member (41).

10. An electromagnetic clutching device according to claim 7, characterised in that The shell comprises a shell cover (11) and a shell body (12); The shell cover (11) and the shell body (12) are connected together by edge pressing, and the installation cavity is formed therebetween; The shell cover (11) and / or the shell body (12) is provided with a wiring hole communicating with the installation cavity; The wiring hole is provided with a wire plug (16); The installation cavity is further filled with an insulating and heat-conducting material (15).

Images