Electric control mechanical brake and driving assembly thereof
By introducing an idler gear bushing oil groove and a self-lubricating bushing into the electromechanical brake, combined with a planetary gear set structure, the problems of gear wear and vibration in traditional brakes are solved, achieving efficient, stable braking performance and long service life.
Patent Information
- Application Number
- CN202520016410.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2035-01-06
AI Technical Summary
In traditional electromechanical brakes, the contact points between the locating pin and the gear are prone to wear during long-term operation with high braking force. This leads to a decrease in gear positioning accuracy, causing vibration and noise, and even damage, affecting service life and efficiency.
An idler gear bushing with an oil groove guides the lubricating grease to distribute evenly, reducing friction loss. The self-lubricating bushing and oil reservoir structure provide long-lasting lubrication and heat dissipation, enhance the strength of the idler gear shaft, and prevent deformation. Combined with a compact planetary gear set structure, it ensures transmission stability and high torque output.
It reduces frictional losses in gears and idler shafts, improves transmission efficiency and mechanical strength, extends service life, reduces energy loss, and ensures stable operation and high-load application capability of the brake.
Smart Images
Figure CN223459788U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to vehicle technical field, specifically relates to a kind of electric control mechanical brake and its driving assembly. BACKGROUND
[0002] Electronic mechanical brake (EMB, Electro Mechanical Brake) belongs to the field of brake-by-wire system of vehicle engineering. The motor output torque is arranged inside the electronic mechanical brake. The motor output torque is transmitted to the caliper through the gear mechanism. The caliper converts the received torque into braking force applied to the vehicle to prevent the wheel from rotating, thereby achieving the braking effect of vehicle deceleration and parking stop.
[0003] The traditional electronic mechanical brake usually uses a positioning pin to position the gear. In the long-term large braking force working process, the contact part of the positioning pin and the gear is prone to wear, which affects the position accuracy of the gear, causes poor gear engagement, causes vibration and noise, and even causes damage.
[0004] Therefore, the above problems need to be solved.
[0005] Practical content
[0006] The utility model provides an electric control mechanical brake and its driving assembly to overcome the above shortcomings. The gear and the positioning shaft friction loss can be reduced to ensure the gear positioning accuracy, avoid the vibration and poor engagement of the gear, prolong the service life, reduce the energy loss, and ensure the mechanical efficiency.
[0007] Technical scheme: in order to achieve the above purpose, the utility model provides a driving assembly of electric control mechanical brake, including driving assembly, the driving assembly includes first shell, the first shell is connected with planetary gear set, the first shell is connected with driving motor on the side away from planetary gear set, the motor shaft of driving motor is connected with driving gear through one end of first shell, and driving gear is driven and connected through idler and planetary gear set. The idler is connected to the first shell through the idler shaft, the idler shaft is provided with the idler shaft sleeve, and the idler is movably connected with the idler shaft through the idler shaft sleeve and the idler shaft. The inner wall of the idler shaft sleeve is provided with an oil groove, and the oil groove is arranged around the axis of the idler shaft sleeve. The driving motor of the utility model drives the driving gear to rotate, the driving gear drives the planetary gear set to rotate through the idler, the idler shaft is provided with the idler shaft sleeve, the idler shaft sleeve can reduce the friction loss and improve the transmission efficiency, the idler shaft sleeve can also improve the strength of the idler shaft, and deformation of the idler shaft is avoided. Lubricating grease is injected into the oil groove, the oil groove can guide the lubricating grease to be evenly distributed in the contact area of the idler shaft and the idler shaft sleeve, the oil groove helps to maintain stable oil film when rotating at high speed, ensures sufficient lubrication, reduces the friction coefficient, reduces wear and prolongs the service life.
[0008] Further, the oil groove of the drive assembly of the electric control mechanical brake is an annular groove or an inclined oil groove. The annular groove is arranged around the inner wall of the idler shaft sleeve, which can ensure uniform distribution of the lubricating grease in the circumferential direction of the idler shaft sleeve, and the oil groove can be provided with a plurality of oil grooves along the axis of the idler shaft sleeve to ensure stable rotation of the shaft during rotation, reduce the friction coefficient, and reduce wear and energy loss. The inclined oil groove is arranged at an angle with the axis of the idler shaft sleeve, so that the lubricating grease flows in the axial direction of the idler shaft sleeve during rotation, improving the flowability of the lubricating grease, ensuring the lubrication effect, and reducing wear and energy loss.
[0009] Further, the drive assembly of the electric control mechanical brake is provided with a self-lubricating shaft sleeve. The self-lubricating shaft sleeve does not need to add lubricating grease and can independently play a lubricating role without the need to replace the lubricating grease, which is convenient to maintain, has a long maintenance period, can continuously provide a lubrication effect, and ensures the stability of the operation of the drive assembly.
[0010] Further, the drive assembly of the electric control mechanical brake is provided with a self-lubricating shaft sleeve. The self-lubricating shaft sleeve does not need to add lubricating grease and can independently play a lubricating role without the need to replace the lubricating grease, which is convenient to maintain, has a long maintenance period, can continuously provide a lubrication effect, and ensures the stability of the operation of the drive assembly.
[0011] Further, the drive assembly of the electric control mechanical brake is provided with a self-lubricating shaft sleeve. The self-lubricating shaft sleeve does not need to add lubricating grease and can independently play a lubricating role without the need to replace the lubricating grease, which is convenient to maintain, has a long maintenance period, can continuously provide a lubrication effect, and ensures the stability of the operation of the drive assembly.
[0012] Further, the drive assembly of the electric control mechanical brake, the gear center is provided with a shaft hole, the shaft hole penetrates the gear and the sun gear, the shaft hole is provided with bearings at two ends respectively, and the two end bearings are arranged at a distance. The total retainer is provided with a gear shaft, the gear shaft passes through the bearings in sequence, and the shaft hole, the bearings and the gear shaft form an oil storage cavity, and grease is arranged in the oil storage cavity. The grease arranged in the oil storage cavity can provide persistent lubrication for the contact parts of the gear shaft and the bearings and the contact parts of the gear and the bearings, thereby reducing wear, reducing energy loss and prolonging the service life of the drive assembly. At the same time, the grease arranged in the oil storage cavity can timely transmit local heat to the shaft hole, the bearings and the gear shaft, can improve the heat dissipation capacity, is favorable for high-load application, and prevents damage caused by overheating.
[0013] Further, the drive assembly of the electric control mechanical brake, the gear center is provided with a shaft hole, the shaft hole penetrates the gear and the sun gear, the shaft hole is provided with bearings at two ends respectively, and the two end bearings are arranged at a distance. The total retainer is provided with a gear shaft, the gear shaft passes through the bearings in sequence, and the shaft hole, the bearings and the gear shaft form an oil storage cavity, and grease is arranged in the oil storage cavity. The grease arranged in the oil storage cavity can provide persistent lubrication for the contact parts of the gear shaft and the bearings and the contact parts of the gear and the bearings, thereby reducing wear, reducing energy loss and prolonging the service life of the drive assembly. At the same time, the grease arranged in the oil storage cavity can timely transmit local heat to the shaft hole, the bearings and the gear shaft, can improve the heat dissipation capacity, is favorable for high-load application, and prevents damage caused by overheating.
[0014] Further, the drive assembly of the electric control mechanical brake, the gear center is provided with a shaft hole, the shaft hole penetrates the gear and the sun gear, the shaft hole is provided with bearings at two ends respectively, and the two end bearings are arranged at a distance. The total retainer is provided with a gear shaft, the gear shaft passes through the bearings in sequence, and the shaft hole, the bearings and the gear shaft form an oil storage cavity, and grease is arranged in the oil storage cavity. The grease arranged in the oil storage cavity can provide persistent lubrication for the contact parts of the gear shaft and the bearings and the contact parts of the gear and the bearings, thereby reducing wear, reducing energy loss and prolonging the service life of the drive assembly. At the same time, the grease arranged in the oil storage cavity can timely transmit local heat to the shaft hole, the bearings and the gear shaft, can improve the heat dissipation capacity, is favorable for high-load application, and prevents damage caused by overheating.
[0015] Further, the drive assembly of the electric control mechanical brake, the gear center is provided with a shaft hole, the shaft hole penetrates the gear and the sun gear, the shaft hole is provided with bearings at two ends respectively, and the two end bearings are arranged at a distance. The total retainer is provided with a gear shaft, the gear shaft passes through the bearings in sequence, and the shaft hole, the bearings and the gear shaft form an oil storage cavity, and grease is arranged in the oil storage cavity. The grease arranged in the oil storage cavity can provide persistent lubrication for the contact parts of the gear shaft and the bearings and the contact parts of the gear and the bearings, thereby reducing wear, reducing energy loss and prolonging the service life of the drive assembly. At the same time, the grease arranged in the oil storage cavity can timely transmit local heat to the shaft hole, the bearings and the gear shaft, can improve the heat dissipation capacity, is favorable for high-load application, and prevents damage caused by overheating.
[0016] The second aspect of the utility model provides a kind of electric control mechanical brake, including above-mentioned drive assembly, drive assembly is driven and is connected with caliper body, and caliper body is connected on support.
[0017] The utility model discloses an electric control mechanical brake and driving assembly thereof, which has the following beneficial effects: the electric control mechanical brake and driving assembly thereof is provided with an idler shaft sleeve to reduce friction loss, improve transmission efficiency, improve the strength of the idler shaft, and avoid deformation of the idler shaft. The oil groove provided on the idler shaft sleeve can guide the lubricating oil to be evenly distributed in the contact area between the idler shaft and the idler shaft sleeve, the oil groove can help maintain a stable oil film, ensure sufficient lubrication, reduce the friction coefficient, reduce wear, and prolong the service life. One end of the idler shaft is connected to the first housing, and the other end is connected to the support part, which can shorten the idler shaft, thereby enhancing the mechanical strength of the idler shaft, improving the bearing capacity of the idler shaft, and avoiding deformation of the idler shaft. The shaft hole, bearing and gear shaft form an oil storage cavity, and the grease provided in the oil storage cavity can provide long-term lubrication for the contact parts of the gear shaft and the bearing, the large gear and the bearing, thereby reducing wear, reducing energy loss, and prolonging the service life of the driving assembly. At the same time, the grease provided in the oil storage cavity can timely transfer local heat to the shaft hole, bearing and gear shaft, thereby improving the heat dissipation capacity, being beneficial to high-load applications, and preventing damage caused by overheating. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 FIG. 1 is a structural schematic view of the driving assembly of the electric control mechanical brake of the utility model;
[0019] Figure 2 FIG. 2 is an exploded schematic view of the electric control mechanical brake of the utility model; Figure 1
[0020] Figure 3 FIG. 5 is a structural schematic view of the idler shaft sleeve;
[0021] Figure 4 FIG. 6 is a sectional view of the large gear;
[0022] Figure 5 FIG. 7 is an exploded view of the electric control mechanical brake of the utility model.
[0023] In the figure: 100, driving assembly, 200, caliper body, 300, support, 1, first housing, 2, planetary gear set, 21, total retainer, 211, support part, 212, gear shaft, 22, large gear, 221, shaft hole, 222, bearing, 23, sun gear, 24, planetary gear, 25, ring gear, 26, second retainer, 3, driving motor, 4, driving gear, 5, idler, 51, idler shaft, 52, idler shaft sleeve, 521, oil groove, 53, washer, 6, second housing. DETAILED DESCRIPTION
[0024] Example 1
[0025] As Figures 1-3 As shown in a kind of drive assembly of electric control mechanical brake, including drive assembly 100, drive assembly 100 includes first shell 1, first shell 1 is connected with planetary gear set 2, first shell 1 is connected with drive motor 3 on the side away from planetary gear set 2, the motor shaft of drive motor 3 passes through the end of first shell 1 and is connected with driving gear 4, driving gear 4 is driven to be connected by idler 5 and planetary gear set 2.Idler 5 is connected to first shell 1 by idler shaft 51, idler shaft 51 is sleeved with idler shaft sleeve 52, idler 5 is movably connected by idler shaft sleeve 52 and idler shaft 51.The inner side wall of idler shaft sleeve 52 is provided with oil groove 5211, and the oil groove 5211 is arranged around the axis of the idler shaft sleeve 52.Lubricating grease is injected into the oil groove 5211.The oil groove 521 is provided as an annular groove or an inclined oil groove.The planetary gear set 2 includes a total holder 21, the total holder 21 is connected with the first shell 1, the total holder 21 is connected with the large gear 22 through the shaft, the large gear 22 is coaxially connected with the sun gear 23, the sun gear 23 is provided with the planetary gear 24 on the outer side, the planetary gear 24 is meshed around the sun gear 23, the planetary gear 24 is provided with the gear ring 25 on the outer side, the planetary gear 24 and the gear ring 25 are meshed, and the gear ring 25 is connected to the first shell 1.The planetary gear 24 is connected to the second holder 26.The planetary gear 24 drives the second holder 26 to rotate.The total holder 21 is provided with a support portion 211, and the support portion 211 is provided with a through hole.The end of the idler shaft 51 away from the first shell 1 is connected to the through hole provided in the support portion 211.The first shell 1 is connected with the second shell 6 provided on one side of the planetary gear set 2, the first shell 1 and the second shell 6 are connected in opposite openings, and the planetary gear set 2 is connected between the first shell 1 and the second shell 6.The idler shaft 51 and the idler shaft sleeve 52 are connected in interference fit.The upper and lower sides of the idler 5 are respectively provided with a gasket 53, the gasket 53 is sleeved on the outer side of the idler shaft 51, and the gasket 53 fills the gap between the upper and lower sides of the idler 5.The gasket 53 is provided as a self-lubricating gasket.
[0026] As Figure 4 shown in the drive assembly of electric control mechanical brake, the center of the large gear 22 is provided with an axle hole 221, the axle hole 221 penetrates the large gear 22 and the sun gear 23, the both ends of the axle hole 221 are respectively provided with bearings 222, and the both ends of the bearings 222 are arranged at a distance.The total holder 21 is provided with a gear shaft 212, the gear shaft 212 passes through the bearings 222 in sequence, and the axle hole 221, the bearings 222 and the gear shaft 212 form an oil storage cavity, and the oil storage cavity is provided with grease.The both sides of the bearing 222 are provided with rubber dustproof covers, the inner ring of the bearing 222 is sealingly connected with the gear shaft 212, and the outer ring of the bearing 222 is sealingly connected with the axle hole 221.
[0027] Example 2
[0028] The difference between this embodiment and example 1 is that the idler shaft sleeve 52 is provided as a self-lubricating shaft sleeve.
[0029] Example 3
[0030] As Figure 5 shown in one kind of electric control mechanical brake, including the drive assembly 100 described above, drive assembly 100 drive connection has the caliper body 200, caliper body 200 is connected on the support 300.
[0031] The above examples are exemplary, the purpose is to illustrate the technical concept and characteristics of the utility model, so that the understanding of this field can understand the content of the utility model and implement, and cannot limit the protection scope of the utility model according to this. Any equivalent change or modification according to the spirit of the utility model should be covered within the protection scope of the utility model.
Claims
1. A drive assembly for an electrically controlled mechanical brake, characterized by: The utility model provides a drive assembly (100) comprising a first housing (1) connected with a planetary gear set (2), a drive motor (3) connected to the side of the first housing (1) away from the planetary gear set (2), a drive gear (4) connected to the motor shaft of the drive motor (3) through one end of the first housing (1), and the drive gear (4) drivenly connected through an idler gear (5) and the planetary gear set (2); the idler gear (5) is connected to the first housing (1) through an idler gear shaft (51), the idler gear shaft (51) is provided with an idler gear shaft sleeve (52), the idler gear (5) is movably connected through the idler gear shaft sleeve (52) and the idler gear shaft (51); the inner side wall of the idler gear shaft sleeve (52) is provided with an oil groove (521), and the oil groove (521) is arranged around the axis of the idler gear shaft sleeve (52).
2. The electrically controlled mechanical brake drive assembly of claim 1, wherein: The oil groove (521) is an annular groove or an inclined oil groove.
3. The electrically controlled mechanical brake drive assembly of claim 1, wherein: The idler gear shaft sleeve (52) is a self-lubricating sleeve.
4. The electrically controlled mechanical brake drive assembly of claim 1, wherein: The planetary gear set (2) comprises a total retainer (21) connected with the first housing (1), a large gear (22) connected with the total retainer (21) through a shaft, a sun gear (23) integrally connected with the large gear (22) coaxially, a planetary gear (24) provided on the outer side of the sun gear (23), the planetary gear (24) being arranged in meshing around the sun gear (23), a ring gear (25) provided on the outer side of the planetary gear (24), the planetary gear (24) and the ring gear (25) being in meshing, and the ring gear (25) being connected to the first housing (1); the planetary gear (24) is connected to a second retainer (26); the planetary gear (24) drives the second retainer (26) to rotate.
5. An electrically controlled mechanical brake drive assembly according to claim 4, wherein: The total retainer (21) is provided with a support portion (211) provided with a through hole; the idler gear shaft (51) is connected to the through hole provided in the support portion (211) at the end away from the first housing (1).
6. The electrically controlled mechanical brake drive assembly of claim 4, wherein: The large gear (22) is provided with an axle hole (221) penetrating through the large gear (22) and the sun gear (23), and the axle hole (221) is provided with a bearing (222) at each end, and the bearings (222) at the two ends are arranged at a distance; the total retainer (21) is provided with a gear shaft (212) sequentially penetrating through the bearings (222), and the axle hole (221), the bearings (222) and the gear shaft (212) form an oil storage cavity, and the oil storage cavity is provided with grease.
7. An electrically controlled mechanical brake drive assembly according to claim 6, wherein: The bearings (222) are provided with rubber dustproof covers on the two sides, the inner ring of the bearing (222) is sealingly connected with the gear shaft (212), and the outer ring of the bearing (222) is sealingly connected with the axle hole (221).
8. The electrically controlled mechanical brake drive assembly of claim 1, wherein: The first housing (1) is connected with a second housing (6) on the side of the planetary gear set (2), the first housing (1) and the second housing (6) are connected in opening opposition, and the planetary gear set (2) is connected between the first housing (1) and the second housing (6).
9. The electrically controlled mechanical brake drive assembly of claim 1, wherein: The idler shaft (51) and the idler shaft sleeve (52) are connected in interference fit; the idler (5) is respectively provided with a gasket (53) on the upper side and the lower side, the gasket (53) is sleeved into the outer side of the idler shaft (51), and the gasket (53) fills the gap on the upper side and the lower side of the idler (5).
10. An electrically controlled mechanical brake, characterized by: The driving assembly (100) comprises the driving assembly (100) of any one of claims 1 to 9, and the driving assembly (100) is drivingly connected with a caliper body (200), and the caliper body (200) is connected to a bracket (300).