Monostable electromagnet for parking mechanism of electromechanical brake
By designing a monostable electromagnet, combining a static iron core, a moving iron core, and a buffer structure, the problems of high cost and noise of bistable electromagnets are solved, achieving low-cost and low-noise parking function and holding force, and improving the service life of components.
Patent Information
- Application Number
- CN202423294522.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing electromechanical brake parking mechanisms mostly use bistable electromagnets, which have problems such as high cost, high noise, and difficulty in applying vibration reduction devices.
The design employs a monostable electromagnet, utilizing the conical fit between the stationary and moving iron cores and a return spring, combined with a buffer pad and a buffer cap, to achieve smooth transmission of electromagnetic force, increase vibration reduction structure, eliminate permanent magnets, reduce noise and improve component lifespan.
It achieves low-cost parking function and holding force, reduces impact noise, and improves the service life of parts.
Smart Images
Figure CN223692955U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to brake system technical field, especially relate to a single stable electromagnet for electronic mechanical brake parking mechanism. BACKGROUND
[0002] The existing EMB mostly adopts integrated parking mechanism design, and realizes parking function through electromagnet driving parking mechanism locking, since wheel end impact vibration acceleration is relatively large, parking mechanism needs relatively large holding force to prevent vehicle running from shaking parking parts when meeting impact, therefore, the current EMB parking mechanism mostly adopts bistable electromagnet.
[0003] The bistable electromagnet guarantees that parking mechanism has enough holding force when locking or separating through permanent magnet magnetizing static iron core attracting dynamic iron core, but the price of permanent magnet itself is relatively expensive, in addition, since parking mechanism is close to brake disc, the overall temperature of EMB is relatively high when vehicle continuously brakes, in order to avoid permanent magnet demagnetization, permanent magnet with relatively good high-temperature resistance needs to be adopted, and the cost is higher.On the other hand, the bistable electromagnet will produce relatively large collision noise in the moment of core attraction, and setting damping device between collision bodies is a relatively common noise reduction means, but it is difficult to apply on the bistable electromagnet, this is because the holding force of the bistable electromagnet is provided by the magnetic field, and once there is gap in the magnetic field, the attraction force will be greatly reduced.
[0004] Therefore, the above problems become technical problems that need to be solved. UTILITY MODEL CONTENT
[0005] The utility model discloses a single stable electromagnet for electronic mechanical brake parking mechanism, can realize parking function and holding force with lower cost, increase damping structure, are favorable to reduce impact noise, improve the life of parts.
[0006] Technical scheme: in order to realize the above object, the utility model provides a single stable electromagnet for electronic mechanical brake parking mechanism, including shell, static iron core, dynamic iron core and coil, the coil is located in the shell, the static iron core is located at the top of the shell, the dynamic iron core is slidably arranged in the shell;
[0007] The bottom of the static iron core is provided with a conical blind hole, the top of the dynamic iron core is provided with a conical boss, the conical boss can be matched with the conical blind hole, the push rod is provided on the dynamic iron core, the reset spring is sleeved on the push rod, one end of the reset spring is in abutment with the static iron core, the other end is in abutment with the upper part of the dynamic iron core, and the push rod extends out of the shell through the static iron core.
[0008] When the electromagnet is energized, the moving iron core is attracted to the static iron core, the conical blind hole is engaged with the conical boss, and the electromagnetic force between the conical blind hole and the conical boss is more stable during the attraction process, thereby playing a role in controlling the electromagnetic force and avoiding violent impact of the two due to excessive electromagnetic force.
[0009] Further, the housing is provided with an annular coil support, the coil is arranged on the coil support, and the static iron core and the moving iron core are arranged in a cavity in the middle of the coil support.
[0010] Further, the upper and lower parts of the moving iron core are respectively provided with limit table one and limit table two, the bottom of the inner surface of the coil support is provided with a limit step, the limit table one can be in contact with the bottom end surface of the static iron core for limiting, and the limit table two is limited in cooperation with the limit step.
[0011] Further, the limit step is provided with a buffer pad one, and the buffer pad one plays a buffering and damping role on the lower part of the moving iron core during the return of the moving iron core.
[0012] Further, the end of the push rod is provided with a buffer cap, and the housing is provided with a buffer pad two, and the buffer cap reduces the collision between the push rod and the driven part.
[0013] Further, the buffer pad two is in the shape of a hollow cylinder, the push rod passes through the buffer pad two, the upper end surface of the buffer pad two can be in contact with the lower end surface of the buffer cap, and the buffer cap and the push rod are connected through knurling or buckling.
[0014] Further, the length of the buffer pad two is greater than the distance from the lower end surface of the buffer cap to the top surface of the housing when the moving iron core is at the bottom of the housing. The buffer pad two is in contact with the lower end surface of the buffer cap, and the buffer pad two blocks the rapid return of the push rod.
[0015] Further, the housing is provided with a group of mounting side ears.
[0016] The above technical solution can be seen, and the utility model has the following beneficial effects:
[0017] 1. The utility model provides a single stable electromagnet for electronic mechanical brake parking mechanism, simple structure cancels permanent magnet, adopts linear return spring and returns moving iron core, guarantees that the electromagnetic iron moving part does not shake under the impact working condition through the design reasonable spring force, realizes single stable electromagnet, and single stable electromagnet can realize the same parking function and holding force, but has cost advantage.
[0018] 2. The utility model discloses in locking and return direction increased buffer cap, buffer pad one, two etc. damping structure, is favorable to reduce the impact noise, improve the life of spare part. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is a top view of a monostable electromagnet for electronic mechanical brake parking mechanism provided by the utility model;
[0020] Figure 2 It is Figure 1 A-A section view in the middle;
[0021] Figure 3 It is a front view of a monostable electromagnet for electronic mechanical brake parking mechanism provided by the utility model;
[0022] Figure 4 It is Figure 3 B-B section view in the middle.
[0023] In the drawing: 1 - shell, 11 - buffer pad two, 12 - installation side ear, 2 - static core, 21 - conical blind hole, 3 - moving core, 31 - conical boss, 32 - limit platform one, 33 - limit platform two, 4 - coil, 5 - push rod, 51 - buffer cap, 6 - reset spring, 7 - coil support, 71 - limit step, 72 - buffer pad one. DETAILED DESCRIPTION
[0024] It should be understood that the specific embodiments described herein are merely to explain the utility model, and are not used to limit the utility model.
[0025] As Figures 1-2 shown: a monostable electromagnet for electronic mechanical brake parking mechanism, including shell 1, static core 2, moving core 3 and coil 4, the coil 4 is located in the shell 1, the static core 2 is located at the top of the shell 1, the moving core 3 is slidably arranged in the shell 1;
[0026] The bottom of the static core 2 is provided with a conical blind hole 21, the top of the moving core 3 is provided with a conical boss 31, the conical boss 31 can be matched with the conical blind hole 21, the push rod 5 is arranged on the moving core 3, the reset spring 6 is sleeved on the push rod 5, one end of the reset spring 6 abuts against the static core 2, and the other end abuts against the upper part of the moving core 3, and the push rod 5 passes through the static core 2 and extends out of the shell 1.
[0027] The reset spring 6 provides a return force for the moving core 3 after the electromagnet is powered off.
[0028] Among them, the shell 1 is provided with an annular coil support 7, the coil 4 is arranged on the coil support 7, and the static core 2 and the moving core 3 are arranged in the cavity between the coil support 7.
[0029] The moving iron core 3 reciprocates in the cavity of the coil support 7 without shaking.
[0030] Preferably, the upper and lower of the moving iron core 3 are respectively provided with a limiting platform one 32 and a limiting platform two 33, and the bottom of the inner surface of the coil support 7 is provided with a limiting step 71, the limiting platform one 32 can be in contact with the bottom end surface of the static iron core 2 for limiting, and the limiting platform two 33 cooperates with the limiting step 71 for limiting.
[0031] The limiting platform one 32 is in contact with the lower end surface of the static iron core 2 to complete the limiting of the upward movement of the moving iron core 3, and the limiting platform two 33 cooperates with the limiting step 71 to complete the limiting of the downward movement of the moving iron core 3. More preferably, a buffer pad can be further arranged between the limiting platform one 32 and the lower end surface of the static iron core 2 to reduce the collision between the limiting platform one 32 and the lower end surface of the static iron core 2.
[0032] In another preferred embodiment, the return spring 6 can be arranged at the tail of the electromagnet, sleeved on the lower part of the moving iron core 3, the bottom of the moving iron core 3 is provided with a gasket, one end of the return spring 6 is connected with the gasket, and the other end is connected with the bottom of the shell 1. The installation form of the return spring 6 is not limited, and the return spring 6 can also be arranged at the head of the electromagnet and acts on the push rod 5 to make the moving iron core 3 reset, as long as it can realize the automatic reset of the moving iron core 3 after power-off.
[0033] The limiting step 71 is provided with a buffer pad one 72, the end of the push rod 5 is sleeved with a buffer cap 51, and the shell 1 is provided with a buffer pad two 11. The buffer pad two 11 is a hollow cylindrical shape, the push rod 5 passes through the buffer pad two 11, the upper end surface of the buffer pad two 11 can be in contact with the lower end surface of the buffer cap 51, and the buffer cap 51 is connected with the push rod 5 through knurling or buckle. When the electromagnet is released after power-off, the moving iron core 3 is separated from the static iron core 2 under the action of the return spring 6, and the lower end surface of the buffer cap 51 first contacts the buffer pad two 11 to slow down the moving iron core 3 during the resetting process, and when the moving iron core 3 is close to the stop position, the limiting platform two 33 at the lower part of the moving iron core 3 contacts the buffer pad one 72 to further reduce the collision between the moving iron core 3 and the limiting platform when the moving iron core 3 returns to the stop position, as shown in Figures 3-4 .
[0034] Preferably, the length of the buffer pad two 11 is greater than the distance from the lower end surface of the buffer cap 51 to the top surface of the shell 1 when the moving iron core 3 is at the bottom of the shell 1.
[0035] In addition, a group of installation side ears 12 are arranged on the outer side of the shell 1.
[0036] The single stable electromagnet for the electronic mechanical brake parking mechanism can realize the same parking function and holding force, has cost advantage, and has the damping structure in the locking and returning directions, so that the impact noise is reduced and the service life of the parts is prolonged.
[0037] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements can be made, and these improvements should also be considered as the protection scope of the present application.
Claims
1. A monostable electromagnet for use in an electronic mechanical brake parking mechanism, characterised in that, Including shell (1), static iron core (2), dynamic iron core (3) and coil (4), the coil (4) is located in the shell (1), the static iron core (2) is located at the top of the shell (1), the dynamic iron core (3) is slidably arranged in the shell (1); The bottom of the static iron core (2) is provided with an inner concave conical blind hole (21), the top of the dynamic iron core (3) is provided with a conical boss (31), the conical boss (31) can be matched with the conical blind hole (21), the dynamic iron core (3) is provided with a push rod (5), the push rod (5) is provided with a reset spring (6), one end of the reset spring (6) is in abutment with the static iron core (2), the other end is in abutment with the upper part of the dynamic iron core (3), the push rod (5) extends out of the shell (1) through the static iron core (2).
2. A monostable electromagnet for use in an electromechanical brake hold mechanism according to claim 1, wherein The shell (1) is provided with an annular coil support (7), the coil (4) is arranged on the coil support (7), and the static iron core (2) and the dynamic iron core (3) are arranged in the cavity in the middle of the coil support (7).
3. A monostable electromagnet for use in an electromechanical brake hold mechanism according to claim 2, wherein The upper and lower of the dynamic iron core (3) are respectively provided with limit platform one (32) and limit platform two (33), the bottom of the inner surface of the coil support (7) is provided with a limit step (71), the limit platform one (32) can be in contact with the bottom end face of the static iron core (2) to limit, and the limit platform two (33) is matched with the limit step (71) to limit.
4. A monostable electromagnet for use in an electromechanical brake hold mechanism according to claim 3, wherein The limit step (71) is provided with a buffer pad one (72).
5. A monostable electromagnet for use in an electromechanical brake hold mechanism according to claim 1, wherein The end of the push rod (5) is provided with a buffer cap (51), and the shell (1) is provided with a buffer pad two (11).
6. A monostable electromagnet for use in an electromechanical brake hold mechanism according to claim 5, wherein The buffer pad two (11) is a hollow cylindrical shape, the push rod (5) passes through the buffer pad two (11), the upper end face of the buffer pad two (11) can be in contact with the lower end face of the buffer cap (51), and the buffer cap (51) and the push rod (5) are connected by knurling or buckle.
7. A monostable electromagnet for use in an electromechanical brake hold mechanism according to claim 6, wherein The length of the buffer pad two (11) is greater than the distance from the lower end face of the buffer cap (51) to the top surface of the shell (1) when the dynamic iron core (3) is at the bottom of the shell (1).
8. A monostable electromagnet for use in an electromechanical brake hold mechanism according to claim 1, wherein A group of mounting side ears (12) are arranged on the outer side of the shell (1).