Driving motor carbon brush grounding system

Abstract

The invention discloses a driving motor carbon brush grounding system which is mainly arranged on the inner side of a motor shaft for conducting grounding and comprises a wear part elastically abutting against the motor shaft and an elastic part used for enabling the wear part to be elastically installed, and an action groove is formed in the middle of the wear part. A safety assembly is arranged at the position, corresponding to the acting groove, of the outer side of the motor shaft. Through the arrangement of the safety assembly, when the abrasion part is abraded to a certain degree, the motor shaft rotates to enable the elastic action part to intermittently act, so that the safety part slowly descends and finally triggers the protection switch, and the motor is powered off. Obviously, a continuous process from recognition of abrasion of the abraded part to triggering of the protection switch is achieved, and in the period, a warning lamp or other warning signals can be arranged to remind a user to replace the abraded part as soon as possible, so that safety is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of motor accessories, and in particular to a carbon brush grounding system for a drive motor. Background Art

[0002] New energy vehicles regard the three-electric system, namely battery, motor and electronic control, as the core technology. The performance of the three-electric system can directly affect the final performance of the product and is also a key factor considered by users when consuming. Among them, the motor is the driving source, and its life and stability are directly related to the durability and safety of the vehicle.

[0003] Existing motors have the following defects: the new energy electric drive assembly is affected by the frequency conversion controller, and during the operation of the motor, an electric potential difference will be generated at both ends of the motor shaft or in the part of the motor shaft, which is the shaft voltage. When the shaft voltage accumulates to the point where it can break through the motor bearing oil film, it will be connected between the motor shaft and the motor bearing and form a shaft current, which will cause electrical corrosion to the motor bearing and lead to unstable operation of the motor bearing. On the other hand, the motor is prone to accumulate charge on its metal shell during operation, which will affect the normal operation of the motor and also pose a safety hazard. The existing motor grounding structure, due to the rotation of the motor shaft, usually the grounding system is prone to wear. When the wear is complete, the grounding function is lost, which is prone to safety hazards. Summary of the invention

[0004] The purpose of the present application is to provide a carbon brush grounding system for a drive motor.

[0005] In order to achieve the above purpose, the technical solution adopted in the present application is: a driving motor carbon brush grounding system, which is mainly arranged on the inner side of the motor shaft for conductive grounding, including a wear part elastically abutting against the motor shaft and an elastic component for elastically installing the wear part, the middle part of the wear part is provided with an action groove, and a safety component is provided at a position corresponding to the action groove on the outer side of the motor shaft, the safety component includes an elastic action part, a transmission structure and a safety part, the elastic action part is extended to the inside of the motor shaft in the initial state, the elastic action part is suitable for contracting when the wear part is installed in place, and the wear part makes the The elastic action part is elastically deformed to avoid the accident; a protection switch is arranged below the safety part, the outer wall of the wear part is connected to the inner cavity of the motor shaft, the wear part is grounded, and the wear part is elastically installed toward the inner side of the inner cavity of the motor shaft. The action groove has different depths and is smoothed at the depth change point. The action grooves of different depths act on the safety component in sequence when the motor shaft rotates, so that the elastic action part can intermittently expand and contract. The intermittently expanding and contracting elastic action part allows the safety part to continue to descend until the safety part descends to trigger the protection switch, thereby cutting off the power supply and stopping the motor.

[0006] As a preferred embodiment, the transmission structure is arranged between the outer side of the elastic action part and the insurance part, and the wearable part includes a wearable body at the head and a fixed body at the tail; when the elastic action part moves toward the outside, the insurance part is moved downward by the transmission structure; the wearable body abuts against the inner side of the elastic action part in the initial installation state, and when the wearable part is worn to a certain extent, the wall thickness of the wearable part is reduced and it can no longer be tightly abutted against the corresponding inner cavity of the motor shaft, and the elastic component advances the wearable part to abut against the fixed body and the elastic action part, and the action groove is formed at the fixed body, and the action groove includes at least two depths, the elastic action part extends toward the inner side of the motor shaft, and acts on different depths of the action groove in turn, the transmission structure and the insurance part cooperate in the shallow part of the action groove to make the insurance part descend, and release the cooperation in the deep part of the action groove, so that the transmission structure moves intermittently with the insurance part.

[0007] As a preferred embodiment, the junction between the wear body and the inner cavity of the motor shaft is conical, and the two conical parts cooperate with each other. When the conical part of the wear body is worn, the fixed body begins to be acted upon by the elastic component. At this time, the elastic action part corresponds to the action groove, so that the elastic action part extends into the action groove. At this time, when the motor shaft rotates, the corresponding elastic action part begins to act on the action grooves of different depths in turn, thereby showing an extension and contraction action. Through the stroke transmission of the transmission structure, such an action is converted into an action of continuously lowering the safety part until the safety part acts on the protection switch.

[0008] As a preferred embodiment, a support assembly is provided at the bottom of the insurance part, and the support assembly includes a hinged support platform, and the support platform is provided with a spring on the side facing the insurance part, and an action protrusion is provided on the inner side of the insurance part, and the action protrusion has a guide surface, and the transmission structure is guided by the guide surface to make the insurance part descend, and when the action protrusion on the insurance part is acted to descend, the action protrusion located below and the support platform act and make the support platform rotate, so that the corresponding action protrusion passes, and after the action protrusion passes, the support platform is immediately restored by the spring reset action, and the insurance part is not affected by the elastic action part and the support platform at this time, until the next action protrusion abuts against the support platform; multiple When the action protrusion acts on the elastic action part in turn, the safety part descends in turn by the distance between two adjacent action protrusions; when the motor shaft rotates, the guide surface of the action protrusion continuously acts at different depths in the action groove, and its outer side is correspondingly transmitted to the action protrusion through the transmission structure. When acting toward the action protrusion, the action protrusion is acted upon by the transmission structure and descends. At this time, the bottom action protrusion passes through the support platform and reaches the bottom of the support platform. The support platform rotates to avoid and then resets. Then the second action protrusion at the bottom and the reset support platform are counteracted. Then, when the motor shaft continues to rotate, the action protrusion continues to descend until the bottom of the safety part triggers the protection switch and the motor stops rotating.

[0009] As a preferred embodiment, action parts are arranged at equal intervals inside the action groove, and the thickness of the action parts gradually increases along the direction in which the action groove and the motor shaft turn in the same direction. A plurality of action parts are arranged at equal intervals, and the action of the elastic action part and the action groove is divided into two stages. The first stage is that the elastic action part is located in the deep part of the action groove, and the elastic action part is in an extended state at this time. The second stage is that the motor shaft rotates so that the elastic action part gradually moves from the low point to the high point of the action part, and the corresponding elastic action part contracts at this time. When the elastic action part and the action groove act, when the motor shaft rotates, the action part and the elastic action part begin to contact and continuously guide and push the elastic action part toward the outside until the action part passes by, and the elastic action part resets and acts on the deepest part of the action groove, and a plurality of spaced action parts perform the same action with the elastic action part in turn.

[0010] As a preferred embodiment, the safety part has a tendency to move toward the protection switch in a natural state, and action protrusions are arranged at intervals on the top of the safety part toward one side of the elastic action part, the top of the action protrusion is a guide surface, and the distance between two adjacent action protrusions is greater than or equal to 1.5 times the height of the action protrusion.

[0011] As a preferred embodiment, the transmission structure includes a lifting part and a transverse moving part, the lifting part is arranged on the transverse moving part, the lifting part is connected to the outer end of the elastic action part, and the lifting part has a sliding groove in the lifting direction on the transverse moving part; the transverse moving part is limitedly installed, and it performs limited movement in the horizontal direction of the lateral movement of the elastic action part, when the elastic action part moves toward the outside of the motor shaft, the transverse moving part moves toward the outside and the lifting part rises at the same time, when the elastic action part moves toward the inside of the motor shaft, the transverse moving part moves toward the inside and the lifting part descends; when the transverse moving part moves toward the outside of the motor shaft, the transverse moving part acts on the action protrusion on the insurance part, so that the action protrusion moves downward; the insurance part and the corresponding action protrusion are arranged in a ring.

[0012] As a preferred embodiment, there are four safety parts arranged in a ring shape, and the corresponding action protrusions are also arranged in a ring shape. The four safety parts are all provided with limiting rods, and the distance between two adjacent safety parts is smaller than the length of the transverse displacement part. In the initial state, the bottom action protrusion and the support platform are against each other.

[0013] As a preference, a compression spring is arranged on the top of the insurance part, and the elasticity of the compression spring is smaller than the elasticity of the spring located at the support platform; in an initial state, the compression spring abuts against the insurance part so that the corresponding action protrusion on the insurance part and the support platform abut against each other.

[0014] As a preference, the carbon brush grounding system of the drive motor also includes a conductive part, which has an elastic stroke. In the initial state, the wear part is fixed to the end of the conductive part, and the conductive part elastically abuts the wear part and the motor shaft through the elastic stroke; an end cover is arranged on one side of the motor shaft, and a mounting plate is also arranged between the end cover and the motor shaft. The mounting plate corresponds to the lower side of the insurance part, and the protection switch is arranged as a travel switch with a power cut-off function installed on the mounting plate. The travel switch is arranged perpendicular to the mounting plate, and an elastic part is arranged so that the travel switch is located at a fixed position protruding from the mounting plate in the initial state.

[0015] Preferably, a step is provided at the bottom of the side surface of the wear part, the action groove is formed at the step, and the action component is arranged at the step; when the head of the wear part begins to wear, the elastic stroke of the conductive part causes it to move in the wear direction until the step corresponds to the elastic action part, and the elastic action part moves and abuts in the direction of the step.

[0016] As a preferred embodiment, the travel switch is connected to the leakage protection switch of the motor, and a sensor is provided at the support table to identify its movement, and the sensor is connected to the electronic control system. When the wear part is worn, the insurance part is continuously driven to move toward one side of the support table, the sensor receives the identification signal at intervals, and the electronic control system provides real-time feedback, and when the insurance part and the travel switch are triggered, the leakage protection switch cuts off the power supply of the motor.

[0017] Compared with the prior art, the beneficial effects of this application are: By setting the insurance component, when the wearable part is worn to a certain extent, the rotation of the motor shaft will cause the elastic action part to intermittently move, so that the insurance part slowly drops and finally triggers the protection switch, thereby cutting off the power supply of the motor. Obviously, it is a continuous process from identifying the wearable part to triggering the protection switch. During this period, a warning light or other warning signal can be set to remind the wearable part to be replaced as soon as possible, thereby ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0019] Figure 2 yes Figure 1 Schematic diagram of the internal structure.

[0020] Figure 3 yes Figure 2 Schematic diagram of the structure of the middle part.

[0021] Figure 4 yes Figure 3 A schematic diagram with some parts hidden.

[0022] Figure 5 It is a schematic diagram of the coordination between the motor shaft and the wear parts.

[0023] Figure 6 is Figure 5 Schematic diagram of the elastic action part at the middle position A.

[0024] Figure 7 It is a schematic diagram of the elastic acting part when it is stretched.

[0025] Figure 8 It is a schematic diagram showing that the insurance components are provided at the motor shaft and the wear parts.

[0026] Fig. 9 yes Figure 8 Schematic diagram from another perspective.

[0027] Fig.10 It is a schematic diagram of the abutment between the support platform and the action protrusion.

[0028] Fig.11 This is a partial structural diagram of the insurance department.

[0029] In the figure: 1. end cover; 2. motor shaft; 3. insurance assembly; 4. insurance part; 5. limit rod; 6. action protrusion; 7. annular action part; 8. protection switch; 9. elastic rod; 10. wear part; 11. conductive part; 12. limit part; 13. elastic component; 14. action groove; 15. transmission structure; 151. transverse part; 152. lifting part; 16. action part. DETAILED DESCRIPTION

[0030] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0032] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0033] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0034] Example: Reference Figures 1 to 11The present embodiment proposes a driving motor carbon brush grounding system, comprising a wear member 10 elastically abutting against the motor shaft 2 and an elastic component 13 for elastically installing the wear member 10, an action groove 14 is provided in the middle part of the wear member 10, and a safety component 3 is provided at a position corresponding to the action groove 14 on the outer side of the motor shaft 2, and the safety component 3 includes an elastic action part, a transmission structure 15 and a safety part 4, the elastic action part extends to the inside of the motor shaft 2 in the initial state, and the elastic action part is suitable for contracting when the wear member 10 is installed in place, and during the installation process, the wear member 10 causes the elastic action part to elastically deform from and avoid it; a protection switch 8 is arranged below the insurance part 4, the outer wall of the wearing part 10 is connected to the inner cavity of the motor shaft 2, the wearing part 10 is grounded, and the wearing part 10 is elastically installed toward the inner side of the inner cavity of the motor shaft 2, and the action groove 14 has different depths and is smoothed at the depth change position. The action grooves 14 of different depths act on the insurance component 3 in sequence when the motor shaft 2 rotates, so that the elastic action part can intermittently expand and contract, and the intermittently expanding and contracting elastic action part allows the insurance part 4 to continue to descend until the insurance part 4 descends to trigger the protection switch 8, and the power supply is cut off to stop the motor from running.

[0035] like Figure 5 As shown, the wear part 10 is actually a part connected to the motor shaft 2 for conducting electricity. It can be a whole, or it can be composed of a conductive part 11 plus a replaceable wear head. Since the end of the wear part 10 and the position groove where it meets the rotating motor shaft 2 will cause friction, its head will actually gradually become smaller. At this time, the elastic part 13 under the wear part 10 will allow the unworn bottom to abut against it, thereby ensuring contact. In order to reduce the wear on the motor shaft 2, the wear part 10 can be set to a material that is more easily worn than the motor shaft 2. When the wear part 10 is worn to a certain extent or completely worn, the grounding system fails. At this time, if the motor continues to run, there may be a risk of electric shock.

[0036] However, wear and tear is difficult to avoid. Therefore, in order to ensure that the motor can stop running in time after the grounding system fails due to wear, the present application sets a safety component 3. When the wear part 10 is worn to a certain extent, the rotation of the motor shaft 2 will cause the elastic action part to intermittently move, so that the safety part 4 slowly descends and finally triggers the protection switch 8, thereby cutting off the power supply of the motor. Obviously, it is a continuous process from identifying the wear of the wear part 10 to triggering the protection switch 8. During this period, a warning light or other warning signal can be set to remind the wear part 10 to be replaced as soon as possible. Of course, in the actual production process, it is usually best to predict this reminder in advance. To achieve this effect, only simple fine-tuning is required: the action groove 14 on the wear part 10 is set slightly in advance, so that when triggered, the wear part 10 is actually not completely worn.

[0037] like Fig.11As shown, the transmission structure 15 is arranged between the outer side of the elastic action part and the insurance part 4, and the wearable part 10 includes a wearable main body at the head and a fixed main body at the tail; when the elastic action part moves toward the outside, the insurance part 4 moves downward through the transmission structure 15; the wearable main body is against the inner side of the elastic action part in the initial installation state, and when the wearable part 10 is worn to a certain extent, the wall thickness of the wearable part 10 is reduced and it can no longer be tightly pressed against the corresponding inner cavity of the motor shaft 2, so the elastic component 13 makes the wearable part 10 move forward to make the fixed main body and the elastic action part against each other, and the action groove 14 is formed at the fixed main body, and the action groove 14 includes at least two depths, and the elastic action part extends toward the inner side of the motor shaft 2, and acts on the different depths of the action groove 14 in turn, and the transmission structure 15 and the insurance part 4 cooperate in the shallow part of the action groove 14 to make the insurance part 4 descend, and release the cooperation in the deep part of the action groove 14, so that the transmission structure 15 moves intermittently with the insurance part 4.

[0038] The joints between the wear body and the inner cavity of the motor shaft 2 are both conical, and the two conical parts cooperate with each other. When the conical part of the wear body is worn, the fixed body begins to be acted upon by the elastic component 13. At this time, the elastic action part corresponds to the action groove 14, so the elastic action part goes deep into the action groove 14. At this time, when the motor shaft 2 rotates, the corresponding elastic action part begins to be acted upon in sequence by the action grooves 14 of different depths, thereby showing an extension and contraction action. At this time, the travel transmission of the transmission structure 15 converts such an action into an action of continuously descending the insurance part 4 (the descent here actually corresponds to the direction close to the protection switch 8) until the insurance part 4 acts on the protection switch 8.

[0039] like Fig. 9As shown, the preferred action groove 14 is provided with action parts 16 at equal intervals inside, and the thickness of the action parts 16 gradually increases along the direction of the same direction of the action groove 14 and the motor shaft 2. A plurality of action parts 16 are provided at equal intervals, so the action of the elastic action part and the action groove 14 can be roughly divided into two stages. The first stage is that the elastic action part is at a deeper position of the action groove 14, and the elastic action part is in an elongated state at this time. The second stage is that the motor shaft 2 rotates so that the elastic action part gradually moves from the lower position to the higher position of the action part 16, and the corresponding elastic action part gradually shrinks at this time. Among them, the elastic action part and the action groove 14 act, and when the motor shaft 2 rotates, the action part 16 and the elastic action part begin to contact and continue to guide and push the elastic action part toward the outside, until the action part 16 passes, the elastic action part resets and acts on the deepest part of the action groove 14, and multiple spaced action parts 16 perform the same action with the elastic action part in turn. Obviously, the increase in the thickness of the action part 16 constitutes the shallow part of the above-mentioned action groove 14, and the position where the action part 16 is not provided is the deep part of the action groove 14. Since the thickness of the above-mentioned action component 16 is increased successively in order to form a guide surface, this will cause the depth of the action component 16 in the action groove 14 to change gradually. Therefore, the description of "the action groove 14 includes at least two depths" is adopted. In fact, the depth of the action groove 14 can be regarded as the depth when there is an action component 16 and the depth when there is no action component 16.

[0040] A support assembly is provided at the bottom of the insurance part 4, and the support assembly includes a hinged support platform, and a spring is provided on the bottom surface of the support platform facing the insurance part 4. Fig.10The figure shows a torsion spring, and an action protrusion is arranged on the inner side of the insurance part 4, and the action protrusion has a guide surface. The transmission structure 15 guides through the guide surface to make the insurance part 4 descend. When the action protrusion on the insurance part 4 is acted to descend, the action protrusion and the support platform located below act and cause the support platform to rotate, so that the corresponding action protrusion passes through. After the action protrusion passes, the support platform is immediately restored by the spring reset action. At this time, the insurance part 4 is not affected by the elastic action part and the support platform until the next action protrusion and the support platform abut against each other; when multiple action components 16 act on the elastic action part in turn, the insurance part 4 descends in turn by the distance between two adjacent action protrusions. Obviously, when the motor shaft 2 rotates, the guide surface of the action protrusion continuously acts at different depths in the action groove 14, and its outer side is correspondingly transmitted to the action protrusion through the transmission structure 15. When it acts toward the action protrusion (corresponding to the elastic action part being in a contracted state at this time, which is manifested as the elastic rod 9 moving obliquely upward outward, and the elastic action part moves toward the action protrusion at this time), the action protrusion is acted upon by the transmission structure 15 and descends. At this time, the bottom action protrusion passes through the support platform and reaches the bottom of the support platform. The support platform rotates to avoid and then resets. At this time, the second action protrusion at the bottom and the reset support platform are against each other. Subsequently, when the motor shaft 2 continues to rotate, the action protrusion will continue to descend until the bottom of the safety part 4 triggers the protection switch 8, and the motor stops rotating.

[0041] Of course, the distance that the action convex block descends due to the action of the transmission structure 15 will be affected by the setting of the guide surface on the action convex block. Therefore, in actual design, it can be designed according to the needs, for example, the distance that the guide surface descends each time can be adjusted to be smaller, so that the corresponding motor shaft 2 can rotate a few more times before the protection switch 8 is triggered and stops, thereby extending the time for controlling the motor to stop. The significance of such a setting is that in some cases, the motor cannot be stopped immediately and some necessary preparations need to be made. At this time, the extended time can provide a sufficient idle period. Of course, at this time, a prompt signal needs to be issued when the action convex block begins to be acted on, prompting the operator to respond in time.

[0042] In order to ensure that the safety part 4 can still be in a suitable action position the next time the transmission structure 15 is actuated each time after being acted upon by the transmission structure 15, the safety part 4 needs to have a tendency to move toward the protection switch 8 in a natural state. Two optional preferred schemes are briefly proposed below for reference.

[0043] (1) The motor is installed in a specific direction. At this time, the safety part 4 remains in a vertical state, so that the action protrusions and the safety column body on it remain in a drooping state under the action of gravity in a natural state. After the first action protrusion and the transmission structure 15 act to make the support platform rotate and avoid, the first action protrusion passes through the support platform, and the support platform is quickly reset (the transmission structure 15 is also reset at this time). Since the second action protrusion in the upward direction is still a distance away from the support platform, the safety part 4 and the action protrusion fall down due to gravity until the second action protrusion and the reset support platform are against each other. At this time, the transmission structure 15 is also in a reset state. In the next action, the second action protrusion can be driven to pass through the support platform again, and the third action protrusion and the reset support platform are against each other. This does not require the setting of additional structures. The gravity of the safety part 4 itself can be used through the specific installation direction of the motor.

[0044] (2) The motor does not need to be installed in a specific direction. In this case, an elastic member, such as a spring, needs to be installed. The general principle is similar to that of the above-mentioned (1). This solution does not use the gravity of the action protrusion, but an additional spring is set. When the first action protrusion passes through the support platform and the support platform completes a rotation avoidance and reset process, the spring makes the second action protrusion automatically move to the reset support platform to abut against it. In this way, the transmission structure 15 and the action protrusion can be continuously acted on; however, in this solution, the elastic force of the spring needs to be limited, that is, the force of the spring that makes the action protrusion abut against the support platform cannot cause the support platform to rotate. This method adds an additional structure, so it is considered to be used when the internal space of the motor is large. For example, a compression spring can be set on the top of the safety part 4, and the elasticity of the compression spring is less than the elasticity of the spring located at the support platform; in the initial state, the compression spring abuts against the safety part 4 so that the corresponding action protrusion on the safety part 4 and the support platform abut against each other.

[0045] In order to ensure that the transmission structure 15 can be normally reset after each action of the transmission structure 15 and the action protrusion is completed, the distance between two adjacent action protrusions needs to be limited, and the top of the insurance part 4 is provided with action protrusions at intervals on one side facing the elastic action part, the top of the action protrusion is a guide surface, and the distance between two adjacent action protrusions is greater than or equal to 1.5 times the height of the action protrusion. When the distance between two adjacent action protrusions is too close, the transmission structure 15 may interact with the next action protrusion during the return process after the action is completed, thereby hindering the return of the transmission structure 15 to a certain extent.

[0046] A preferred embodiment of the transmission structure 15 is proposed below.

[0047] like Fig.11As shown, the transmission structure 15 includes a lifting part 152 and a transverse moving part 151, the lifting part 152 is arranged on the transverse moving part 151, the lifting part 152 is connected to the outer end of the elastic action part, and the lifting part 152 is arranged on the transverse moving part 151, and has a sliding groove in the lifting direction on the transverse moving part 151. The transverse moving part 151 is limitedly installed, and it moves in a limited direction in the direction of the transverse movement of the elastic action part, so when the elastic action part moves to the outside of the motor shaft 2, it can be understood that this movement is divided into a height direction and a horizontal direction. When the elastic action part moves to the outside, the transverse moving part 151 moves to the outside and the lifting part 152 rises at the same time, and when the elastic action part moves to the inside of the motor shaft 2, the transverse moving part 151 moves to the inside (one side of the motor shaft 2), and the lifting part 152 descends. When the transverse moving part 151 moves toward the outside of the motor shaft 2, the transverse moving part 151 will act on the action protrusion 6 on the insurance part 4, so that the action protrusion 6 moves downward. Of course, the motor shaft 2 is in a rotating state, so the corresponding transverse portion 151 and the lifting portion 152 also rotate together, the transverse portion 151 cannot move in the height direction, and the lifting portion 152 is restricted by the transverse portion 151 and can only be lifted and lowered in the height direction of the transverse portion 151. Therefore, even when rotating, the transverse portion 151 and the lifting portion 152 can maintain transverse movement and lifting while rotating, thereby interacting with the action protrusion 6. At this time, the insurance portion 4 and the corresponding action protrusion 6 are as follows. Figure 8 As shown, it is arranged in a ring shape. Four safety parts 4 can be arranged in a ring shape, and the corresponding action protrusions 6 are also arranged in a ring shape (in this case, the transverse displacement part 151 is also preferably provided with an annular action part 7 for coordinated action). The four safety parts 4 are all provided with limiting rods 5, so that the safety parts 4 can only move up and down. The distance between two adjacent safety parts 4 (corresponding action protrusions 6) is smaller than the length of the transverse displacement part 151, so that even if the transverse displacement part 151 rotates to between two adjacent action protrusions 6, it will not be separated from the action protrusions 6. In the initial state, since the bottom action protrusion 6 and the support platform are against each other, the safety part 4 is initially located at a higher position. Of course, the safety part 4 can also be arranged in a whole ring shape, which can be limited by the limiting rod 5.

[0048] The carbon brush grounding system of the driving motor also includes a conductive member 11, which has an elastic stroke. In the initial state, the wear member 10 is fixed to the end of the conductive member 11, and the conductive member 11 uses the elastic stroke to make the wear member 10 and the motor shaft 2 elastically abut each other; an end cover 1 is provided on one side of the motor shaft 2, and a mounting plate is also provided between the end cover 1 and the motor shaft 2. The lower side of the insurance part 4 corresponds to the mounting plate, and the protection switch 8 is provided as a travel switch with a power cut-off function installed on the mounting plate. The travel switch is arranged perpendicular to the mounting plate, and an elastic member is provided so that the travel switch is located at a fixed position protruding from the mounting plate in the initial state, and the elastic member is not shown in the accompanying drawings.

[0049] A step is provided at the bottom of the side of the wear part 10, an action groove 14 is formed at the step, and an action component 16 is arranged at the step; when the head of the wear part 10 begins to wear, the elastic stroke of the conductive part 11 causes it to move in the wear direction until the step corresponds to the elastic action part, and the elastic action part moves and abuts in the direction of the step.

[0050] It is understandable that during the normal use of the wearable part 10, the various components of the insurance component 3 do not function, so there is no wear. However, as a consumable part, it is difficult to detect the degree of wear of the wearable part 10 at the conductive front end in real time. When there is an abnormality in the grounding, the motor is not well grounded during operation, which can easily cause the risk of electric shock or leakage. The grounding system proposed in this application is provided with a functional part for indicating abnormalities of the wearable part 10. The functional part is the insurance component 3. The insurance component 3 is triggered by the transmission structure 15 and is only triggered when the wearable part 10 is worn to a certain extent. When the motor shaft 2 is used daily, the transmission structure 15 hardly moves.

[0051] The travel switch is connected to the leakage protection switch 8 of the motor, and a sensor is provided at the support table to identify its movement. The sensor is connected to the electronic control system. When the wear part 10 is worn, the insurance part 4 is continuously driven to move toward one side of the support table. The sensor receives the identification signal at intervals and the electronic control system provides real-time feedback. When the insurance part 4 triggers the travel switch, the leakage protection switch 8 cuts off the power supply to the motor.

[0052] In addition, a pressure sensor or other types of sensors may be provided at the action protrusion 6 to identify and send out a warning signal when the wearable part 10 acts on the action protrusion 6 for the first time after being worn to a certain extent.

[0053] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A driving motor carbon brush grounding system, mainly arranged on the inner side of the motor shaft for conductive grounding, characterized in that: The invention comprises a wear part elastically abutting against the motor shaft and an elastic component for elastically installing the wear part, an action groove is arranged in the middle part of the wear part, a safety component is arranged at a position corresponding to the action groove on the outer side of the motor shaft, the safety component comprises an elastic action part, a transmission structure and a safety component, the elastic action part extends to the inside of the motor shaft in an initial state, the elastic action part is suitable for contracting when the wear part is installed in place, and during the installation process, the wear part causes the elastic action part to elastically deform so as to avoid; a protection switch is arranged below the safety component, the outer wall of the wear part is connected to the inner cavity of the motor shaft, the wear part is grounded, and the wear part is elastically installed toward one side of the inner cavity of the motor shaft, the action groove has different depths, and is smoothed at the depth change position, and the action grooves of different depths act on the safety component in sequence when the motor shaft rotates, so that the elastic action part can be intermittently extended and retracted, and the intermittently extended elastic action part allows the safety component to continue to descend until the safety part descends to trigger the protection switch, thereby cutting off the power supply and stopping the motor from running.

2. The driving motor carbon brush grounding system according to claim 1, characterized in that: The transmission structure is arranged between the outer side of the elastic action part and the insurance part, and the wearable part includes a wearable main body at the head and a fixed main body at the tail; when the elastic action part moves toward the outside, the insurance part moves downward through the transmission structure; the wearable main body abuts against the inner side of the elastic action part in the initial installation state, and when the wearable part is worn to a certain extent, the wall thickness of the wearable part is reduced and it can no longer be tightly abutted against the corresponding inner cavity of the motor shaft, and the elastic component advances the wearable part to abut against the fixed main body and the elastic action part, and the action groove is formed at the fixed main body, and the action groove includes at least two depths, and the elastic action part extends toward the inner side of the motor shaft and acts on different depths of the action groove in turn, and the transmission structure and the insurance part cooperate in the shallow part of the action groove to make the insurance part descend, and release the cooperation in the deep part of the action groove, so that the transmission structure moves intermittently with the insurance part.

3. The driving motor carbon brush grounding system according to claim 2, characterized in that: The junction between the wear body and the inner cavity of the motor shaft is conical, and the two conical parts cooperate with each other. When the conical part of the wear body is worn, the fixed body begins to be acted upon by the elastic component. At this time, the elastic action part corresponds to the action groove, so that the elastic action part extends into the action groove. At this time, when the motor shaft rotates, the corresponding elastic action part begins to act on the action grooves of different depths in turn, thereby showing an extension and contraction action. Through the stroke transmission of the transmission structure, such an action is converted into an action of continuously lowering the safety part until the safety part acts on the protection switch.

4. The driving motor carbon brush grounding system according to claim 3, characterized in that: A support assembly is provided at the bottom of the insurance part, and the support assembly includes a hinged support platform, and the support platform is provided with a spring on the side facing the insurance part, and an action protrusion is provided on the inner side of the insurance part, and the action protrusion has a guide surface, and the transmission structure is guided by the guide surface to make the insurance part descend. When the action protrusion on the insurance part is acted to descend, the action protrusion located below and the support platform act and make the support platform rotate so that the corresponding action protrusion passes through. After the action protrusion passes, the support platform is immediately restored by the spring reset action, and the insurance part is not affected by the elastic action part and the support platform at this time until the next action protrusion abuts against the support platform; multiple action protrusions When the protrusions act on the elastic action part in sequence, the safety part descends in sequence by the distance between two adjacent action protrusions; when the motor shaft rotates, the guide surface of the action protrusion continuously acts at different depths in the action groove, and its outer side is correspondingly transmitted to the action protrusion through the transmission structure. When acting toward the action protrusion, the action protrusion is acted on by the transmission structure and descends. At this time, the bottom action protrusion passes through the support platform and reaches the bottom of the support platform. The support platform rotates to avoid and then resets. Then the second action protrusion at the bottom and the reset support platform are against each other. Then, when the motor shaft continues to rotate, the action protrusion continues to descend until the bottom of the safety part triggers the protection switch and the motor stops rotating.

5. The driving motor carbon brush grounding system according to claim 4, characterized in that: Action parts are arranged at equal intervals inside the action groove, and the thickness of the action parts gradually increases along the direction in which the action groove and the motor shaft turn in the same direction. A plurality of action parts are arranged at equal intervals, and the action of the elastic action part and the action groove is divided into two stages. The first stage is that the elastic action part is located in the deep part of the action groove, and the elastic action part is in an extended state at this time. The second stage is that the motor shaft rotates so that the elastic action part gradually moves from the low point to the high point of the action part, and the corresponding elastic action part contracts at this time. When the elastic action part and the action groove act, when the motor shaft rotates, the action part and the elastic action part begin to contact and continuously guide and push the elastic action part toward the outside until the action part passes by, and the elastic action part resets and acts on the deepest part of the action groove, and a plurality of spaced action parts perform the same action with the elastic action part in turn.

6. The driving motor carbon brush grounding system according to claim 5, characterized in that: The insurance part has a tendency to move toward the protection switch in a natural state, and an action protrusion is arranged at intervals on the top of the insurance part toward one side of the elastic action part, the top of the action protrusion is a guide surface, and the spacing between two adjacent action protrusions is greater than or equal to 1.5 times the height of the action protrusion; the transmission structure includes a lifting part and a transverse displacement part, the lifting part is arranged on the transverse displacement part, the lifting part is connected to the outer end of the elastic action part, and the lifting part has a sliding groove in the lifting direction on the transverse displacement part; the transverse displacement part is limitedly installed, and it moves in a horizontal direction in which the elastic action part moves laterally. When the elastic action part moves toward the outside of the motor shaft, the transverse displacement part moves toward the outside and the lifting part rises at the same time, and when the elastic action part moves toward the inside of the motor shaft, the transverse displacement part moves toward the inside and the lifting part descends; when the transverse displacement part moves toward the outside of the motor shaft, the transverse displacement part acts on the action protrusion on the insurance part, so that the action protrusion moves downward; the insurance part and the corresponding action protrusion are arranged in an annular manner.

7. The driving motor carbon brush grounding system according to claim 6, characterized in that: There are four safety parts arranged in a ring shape, and the corresponding action protrusions are also arranged in a ring shape. The four safety parts are all provided with limit rods, and the distance between two adjacent safety parts is smaller than the length of the transverse displacement part. In the initial state, the action protrusion at the bottom is against the support platform.

8. The driving motor carbon brush grounding system according to claim 7, characterized in that: It also includes a conductive part, which has an elastic stroke. In the initial state, the wear part is fixed to the end of the conductive part, and the conductive part makes the wear part and the motor shaft elastically abut each other; an end cover is arranged on one side of the motor shaft, and a mounting plate is also arranged between the end cover and the motor shaft, and the lower side of the insurance part corresponds to the mounting plate. The protection switch is arranged as a travel switch with a power cut-off function installed on the mounting plate, and the travel switch is arranged perpendicular to the mounting plate, and an elastic part is arranged so that the travel switch is located at a fixed position protruding from the mounting plate in the initial state; a step is provided at the bottom of the side surface of the wear part, and the action groove is formed at the step, and the action component is arranged at the step; when the head of the wear part begins to wear, the elastic component makes the wear part move in the wear direction until the step corresponds to the elastic action part, and the elastic action part moves and abuts in the direction of the step.

9. The driving motor carbon brush grounding system according to claim 8, characterized in that: A compression spring is arranged on the top of the insurance part, and the elasticity of the compression spring is smaller than the elasticity of the spring located at the support platform; in an initial state, the compression spring abuts against the insurance part so that the corresponding action protrusion on the insurance part abuts against the support platform.

10. The driving motor carbon brush grounding system according to claim 9, characterized in that: The travel switch is connected to the leakage protection switch of the motor, and a sensor is provided at the support platform to identify its movement. The sensor is connected to the electronic control system. When the wear part is worn, the insurance part is continuously driven to move toward one side of the support platform. The sensor receives the identification signal at intervals and the electronic control system provides real-time feedback. When the insurance part triggers the travel switch, the leakage protection switch cuts off the power supply of the motor.

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