Electric control mechanical brake and transmission component

Abstract

The utility model provides an electric control mechanical brake and transmission part, including transmission mechanism assembly, transmission mechanism assembly includes upper shell and lower shell, lower shell close to the one side of upper shell is connected with gear mechanism, lower shell far away from the one side of upper shell is connected with drive motor, the one end of motor shaft of drive motor close to upper shell is connected with motor gear. An idle gear is connected between the upper shell and the lower shell, and the gear mechanism comprises a planetary gear structure and a first retainer. The first holder is provided with a fixing hole and a supporting hole, and the first holder is connected with the lower shell through the fixing hole. The idler is movably connected between the upper shell and the lower shell through an idler shaft, one end of the idler shaft is connected to the lower shell, and the end, away from the lower shell, of the idler shaft is connected to the supporting hole. Supporting force is provided for the idler shaft through the retainer, displacement or deformation of the idler shaft is avoided when large braking force is output, a gear mechanism is prevented from being damaged, and the service life is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of vehicle technology, specifically relating to an electromechanical brake and transmission components. Background Technology

[0002] Electro-mechanical brakes (EMBs) belong to the field of brake-by-wire systems in vehicle engineering. An internal motor acts as the power source, and the torque generated by the motor is transmitted to the caliper via a gear assembly. The caliper converts the received torque into braking force applied to the vehicle to prevent wheel rotation, thereby achieving the braking effect of deceleration and parking.

[0003] In patent CN115195684A, the gear locating pin is positioned by injection molding one end integrally with the housing, while the other end is cantilevered and clamped by an end cap. However, the injection molding process can easily lead to poor positioning accuracy of the locating pin, which in turn affects the positioning accuracy of the transmission gear, easily causing gear meshing noise. Furthermore, under high ambient temperature and high clamping force requirements, the locating pin may deform or fail.

[0004] In patent CN116136237A, the gear positioning pin is positioned by mounting one end to the housing and machining a journal on the other end, which is then constrained by a retaining ring and a washer. For large gears, a cage is used for positioning. The cage uses a hole-shaft mating mechanism to ensure precise positioning. However, the hole-shaft on the housing is a thin-walled structure, which is prone to vibration and deformation during machining, making dimensional accuracy difficult to control and increasing the machining difficulty. It is also difficult to guarantee the dimensional accuracy of the hole and shaft. Furthermore, during use, the thin-walled hole-shaft, due to its poor rigidity, is prone to deformation, affecting positioning accuracy, leading to efficiency losses, and ultimately affecting service life.

[0005] Therefore, the above problems urgently need to be solved.

[0006] Practical content

[0007] Practical Purpose: To overcome the above shortcomings, this utility model provides an electromechanical brake and transmission component to ensure the connection strength and accuracy of the gear mechanism, prevent the gear structure from deforming or shifting during operation, improve structural stability, and extend service life.

[0008] Technical Solution: To achieve the above objectives, this utility model provides a transmission component for an electromechanical brake, including a transmission mechanism assembly. The transmission mechanism assembly includes an upper housing and a lower housing, which are connected with openings facing each other, forming a hollow cavity. A gear mechanism is connected to the lower housing near the upper housing, and a drive motor is connected to the lower housing away from the upper housing. The motor shaft of the drive motor passes through the lower housing, and a motor gear is connected to the end of the motor shaft near the upper housing. An idler gear is connected between the upper and lower housings, positioned between the motor gear and the gear mechanism, and meshes with both. The gear mechanism includes a planetary gear structure and a first cage. The first cage has a fixing hole and a support hole, and is connected to the lower housing through the fixing hole. The idler gear is movably connected between the upper and lower housings via an idler gear shaft, with one end of the idler gear shaft connected to the lower housing and the other end connected to the support hole. In this invention, the drive motor drives the gear mechanism to rotate via an idler wheel. The idler wheel allows the torque of the drive motor to be transmitted to the gear mechanism more smoothly, and it also shares some of the pressure, reducing the load on the gear mechanism and minimizing wear. Simultaneously, the planetary gear structure is connected between the upper and lower housings via a first cage, ensuring the connection strength and precision of the planetary gear structure, preventing displacement during operation, and improving structural stability. One end of the idler wheel shaft is connected to the lower housing, and the other end is connected to a support hole in the first cage. The cage provides support for the idler wheel shaft, improving the connection strength and stability, preventing displacement or deformation of the idler wheel shaft when outputting large braking forces, thus avoiding damage to the gear mechanism and extending its service life.

[0009] Furthermore, in the transmission components of the aforementioned electromechanical brake, an idler bearing is fitted onto the idler shaft, and the idler wheel is movably connected to the idler shaft via the idler bearing. The idler shaft and the lower housing are interference-fitted. The use of an idler bearing on the idler shaft reduces friction between the idler shaft and the idler wheel, lowers force loss, and improves transmission efficiency.

[0010] Furthermore, in the transmission components of the aforementioned electromechanical brake, the idler wheel shaft sleeve is equipped with shims, which are respectively located on the upper and lower sides of the idler wheel bearing. The shims abut against the inner ring of the idler wheel bearing, isolating the idler wheel bearing from the upper and lower housings, ensuring smooth rotation of the idler wheel bearing, reducing torque loss, and at the same time, the shims can adjust the clearance between the upper and lower sides of the idler wheel bearing, improve the positioning accuracy of the idler wheel bearing, prevent the idler wheel bearing from moving around, and improve transmission efficiency and service life.

[0011] Furthermore, in the transmission components of the aforementioned electromechanical brake, the first retainer includes a retaining plate, with fixing holes arranged in an array around the center of the retaining plate and located at the four corners of the retaining plate. The retaining plate is connected to a pin. The retaining plate has a support portion with support holes located therein. The retaining plate is formed by stamping, during which the fixing holes and support holes are formed simultaneously. This process is convenient and efficient, ensuring sufficient support for the planetary gear structure and guaranteeing structural stability.

[0012] Furthermore, in the transmission component of the aforementioned electromechanical brake, a pin sleeve is provided in the fixing hole. The pin sleeve and the fixing hole are interference-fitted. One end of the pin sleeve is located in the recessed platform provided in the lower housing. The retaining plate is connected between the upper housing and the lower housing by a pin inserted through the pin sleeve. By pressing the pin sleeve into the fixing hole and then connecting through the pin sleeve, the pin sleeve has higher strength relative to the lower housing, ensuring that the first retainer has sufficient support strength. The pin sleeve increases the contact area at the connection between the first retainer and the lower housing, reduces local stress, reduces the possibility of deformation of the lower housing, improves the stability of the connection, and improves the installation accuracy of the planetary gear structure.

[0013] Furthermore, in the transmission component of the aforementioned electromechanical brake, a first support ring is provided along the circumference of the support hole, and the idler shaft is connected within the first support ring. The first support ring increases the contact area between the idler shaft and the retaining plate, thereby increasing the connection strength of the idler shaft, preventing deformation of the support hole when outputting large braking force, and improving service life.

[0014] Furthermore, in the transmission component of the aforementioned electromechanical brake, the retaining plate is provided with a second support ring, and the pin is connected within the second support ring. The second support ring enhances the connection strength between the pin and the retaining plate, improves stability, and prevents pin deformation when outputting large braking forces.

[0015] Furthermore, in the transmission components of the aforementioned electromechanical brake, the planetary gear structure includes a large gear connected to the first cage shaft. A sun gear is coaxially connected to the large gear near the lower housing. Planetary gears mesh around the sun gear, and a gear ring is provided on the outer side of the planetary gears. The planetary gears mesh with the gear ring, which is connected to the lower housing. A second cage is connected to the planetary gears. During operation, the planetary gears drive the second cage to rotate. The large gear is connected to the first cage, which distributes the pressure on the large gear to the lower housing, reducing the stress on the connection between the first cage and the lower housing, preventing deformation of the lower housing, and improving the stability of the mechanism.

[0016] Furthermore, in the transmission component of the aforementioned electromechanical brake, a bearing is fitted onto the pin, with the bearing positioned on the upper and lower sides of the large gear. The pin is movably connected to the large gear shaft via the bearing. The bearing configuration reduces the friction between the large gear and the pin, thereby improving transmission efficiency.

[0017] The second aspect of this utility model is to provide an electromechanical brake, including a transmission mechanism assembly, wherein the transmission mechanism assembly is driven and connected to a caliper body, and the caliper body is connected to a bracket.

[0018] As can be seen from the above technical solution, this utility model has the following beneficial effects: The electromechanical brake and transmission components of this utility model feature an idler gear that can share the pressure, reduce the load on the gear mechanism, and decrease wear. Simultaneously, the planetary gear structure is connected between the upper and lower housings via a first cage, ensuring the connection strength and accuracy of the planetary gear structure, preventing displacement during operation, and improving structural stability. Connecting one end of the idler gear shaft to the idler gear shaft and the other end to the support hole in the first cage improves the connection strength and stability of the idler gear, preventing displacement or deformation of the idler gear shaft during high braking force output, which could damage the gear mechanism and affect its service life. The retaining plate is formed by stamping, simultaneously forming the fixing hole and support hole during the stamping process, resulting in high production efficiency and ensuring sufficient support force for the planetary gear structure, thus ensuring structural stability. By pressing a pin sleeve into the fixing hole, the first cage is ensured to have sufficient support strength, improving connection stability and the installation accuracy of the planetary gear structure. Attached Figure Description

[0019] Figure 1 This is an exploded view of the transmission component of the electromechanical brake of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of the first cage;

[0021] Figure 3 for Figure 1 Enlarged view of a specific area;

[0022] Figure 4 for Figure 2 An explosion diagram;

[0023] Figure 5 This is an exploded schematic diagram of the electromechanical brake.

[0024] In the diagram: 1. Transmission mechanism assembly; 11. Upper housing; 12. Lower housing; 13. Gear mechanism; 131. Planetary gear structure; 1311. Large gear; 1312. Sun gear; 1313. Planetary gear; 1314. Gear ring; 1315. Second cage; 13251. Bearing; 132. First cage; 1321. Fixing hole; 1322. Support hole; 13221. First support ring; 1323. Retaining plate; 13231. Second support ring; 1324. Support part; 1325. Pin shaft; 1326. Pin sleeve; 14. Drive motor; 15. Motor gear; 16. Idler gear; 161. Idler gear shaft; 162. Idler gear bearing; 163. Shim; 2. Caliper body; 3. Bracket. Detailed Implementation

[0025] Example 1

[0026] like Figure 1-2 The transmission component of an electromechanical brake, as shown, includes a transmission mechanism assembly 1. The transmission mechanism assembly 1 includes an upper housing 11 and a lower housing 12, which are connected with openings facing each other, forming a hollow cavity. A gear mechanism 13 is connected to the side of the lower housing 12 closest to the upper housing 11, and a drive motor 14 is connected to the side of the lower housing 12 furthest from the upper housing 11. The motor shaft of the drive motor 14 passes through the lower housing 12, and a motor gear 15 is connected to the end of the motor shaft closest to the upper housing 11. An idler gear 16 is connected between the upper housing 11 and the lower housing 12, positioned between the motor gear 15 and the gear mechanism 13, and meshes with both. The gear mechanism 13 includes a planetary gear structure 131 and a first retainer 132. The first retainer 132 has a fixing hole 1321 and a support hole 1322, and is connected to the lower housing 12 through the fixing hole 1321. The idler wheel 16 is movably connected between the upper housing 11 and the lower housing 12 via the idler wheel shaft 161. One end of the idler wheel shaft 161 is connected to the lower housing 12, and the other end of the idler wheel shaft 161 away from the lower housing 12 is connected to the support hole 1322.

[0027] The planetary gear structure 131 includes a large gear 1311 shaft-connected to the first cage 132. A sun gear 1312 is coaxially connected to the large gear 1311 near the lower housing 12. A planetary gear 1313 meshes around the sun gear 1312. A gear ring 1314 is provided on the outer side of the planetary gear 1313. The planetary gear 1313 and gear ring 1314 mesh, and the gear ring 1314 is connected to the lower housing 12. A second cage 1315 is connected to the planetary gear 1313. During operation, the planetary gear 1313 drives the second cage 1315 to rotate. A bearing 13251 is fitted onto a pin 1325, and the bearing 13251 is located on the upper and lower sides of the large gear 1311. The pin 1325 is movably connected to the large gear 1311 shaft via the bearing 13251.

[0028] In this utility model, the drive motor 14 drives the gear mechanism 13 to rotate via the idler wheel 16. Specifically, the idler wheel 16 rotates around the idler wheel shaft 161, and the idler wheel 16 drives the large gear 1311 to rotate around the pin shaft 1325. The large gear 1311 drives the planetary gear 1313 to rotate via the sun gear 1312. The planetary gear 1313 rotates around the gear ring 1314, thereby driving the second cage 1315 to rotate.

[0029] like Figure 3 The transmission component of the electromechanical brake shown includes an idler shaft 161 fitted with an idler bearing 162, and an idler wheel 16 movably connected to the idler shaft 161 via the idler bearing 162. The idler shaft 161 and the lower housing 12 are interference-fitted. Shims 163 are fitted onto the idler shaft 161, and are located on the upper and lower sides of the idler bearing 162.

[0030] like Figure 4The transmission component of the electromechanical brake shown includes a first retainer 132 comprising a retaining plate 1323, with fixing holes 1321 arranged in an array around the center of the retaining plate 1323 and at its four corners. A pin 1325 is connected to the retaining plate 1323. The retaining plate 1323 has a support portion 1324, with support holes 1322 located within it. The retaining plate 1323 is formed by stamping, during which the fixing holes 1321 and support holes 1322 are formed simultaneously. A pin sleeve 1326 is provided within the fixing hole 1321, and the pin sleeve 1326 is interference-fitted with the fixing hole 1321. One end of the pin sleeve 1326 is located within a recess in the lower housing 12. The retaining plate 1323 is connected to the upper housing 11 and the lower housing 12 via a pin inserted through the pin sleeve 1326. The connection strength of the first retainer 132 is ensured by pressing a pin sleeve 1326 into the fixing hole 1321 and then connecting through the pin sleeve 1326. A first support ring 13221 is provided around the support hole 1322, and the idler shaft 161 is connected to the first support ring 13221. The retaining plate 1323 is provided with a second support ring 13231, and a pin shaft 1325 is connected to the second support ring 13231.

[0031] Example 2

[0032] like Figure 5 The electromechanical brake shown includes a transmission mechanism assembly 1, which is driven by a caliper body 2, which is connected to a bracket 3.

[0033] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A transmission component of an electromechanical brake, characterized in that: The system includes a transmission mechanism assembly (1), which comprises an upper housing (11) and a lower housing (12). The upper housing (11) and the lower housing (12) are connected with openings opposite each other. A gear mechanism (13) is connected to the side of the lower housing (12) near the upper housing (11), and a drive motor (14) is connected to the side of the lower housing (12) away from the upper housing (11). The motor shaft of the drive motor (14) passes through the lower housing (12), and a motor gear (15) is connected to the end of the motor shaft of the drive motor (14) near the upper housing (11). An idler gear (16) is connected between the upper housing (11) and the lower housing (12), and the idler gear (16) is located between the motor gear (15) and the gear mechanism. Between the components (13), the idler wheel (16) meshes with the motor gear (15) and the gear mechanism (13) respectively; the gear mechanism (13) includes a planetary gear structure (131) and a first cage (132); the first cage (132) is provided with a fixing hole (1321) and a support hole (1322), and the first cage (132) is connected to the lower housing (12) through the fixing hole (1321); the idler wheel (16) is movably connected between the upper housing (11) and the lower housing (12) through the idler wheel shaft (161), one end of the idler wheel shaft (161) is connected to the lower housing (12), and the other end of the idler wheel shaft (161) away from the lower housing (12) is connected to the support hole (1322).

2. The transmission component of the electromechanical brake according to claim 1, characterized in that: The idler shaft (161) is fitted with an idler bearing (162), and the idler (16) is movably connected to the idler shaft (161) through the idler bearing (162); the idler shaft (161) and the lower housing (12) are interference fit.

3. The transmission component of the electromechanical brake according to claim 2, characterized in that: The idler shaft (161) is fitted with a gasket (163), and the gasket (163) is respectively located on the upper and lower sides of the idler bearing (162).

4. The transmission component of the electromechanical brake according to claim 1, characterized in that: The first retainer (132) includes a retaining plate (1323), and the fixing holes (1321) are arranged in an array around the center of the retaining plate (1323). The fixing holes (1321) are located at the four corners of the retaining plate (1323). The retaining plate (1323) is connected to a pin (1325). The retaining plate (1323) is provided with a support portion (1324), and the support hole (1322) is located in the support portion (1324).

5. The transmission component of the electromechanical brake according to claim 4, characterized in that: The fixing hole (1321) is provided with a pin sleeve (1326), the pin sleeve (1326) and the fixing hole (1321) are interference fit, one end of the pin sleeve (1326) is provided in the recessed platform provided in the lower shell (12), and the retaining plate (1323) is connected between the upper shell (11) and the lower shell (12) through a pin inserted through the pin sleeve (1326).

6. The transmission component of the electromechanical brake according to claim 1, characterized in that: A first support ring (13221) is provided around the support hole (1322), and the idler shaft (161) is connected inside the first support ring (13221).

7. The transmission component of the electromechanical brake according to claim 4, characterized in that: The retaining plate (1323) is provided with a second support ring (13231), and the pin (1325) is connected inside the second support ring (13231).

8. The transmission component of the electromechanical brake according to claim 1, characterized in that: The planetary gear structure (131) includes a large gear (1311) that is shaft-connected to the first cage (132). The large gear (1311) is coaxially connected to a sun gear (1312) near the lower housing (12). A planetary gear (1313) is meshed around the sun gear (1312). A gear ring (1314) is provided on the outer side of the planetary gear (1313). The planetary gear (1313) and the gear ring (1314) mesh. The gear ring (1314) is connected to the lower housing (12). The planetary gear (1313) is connected to a second cage (1315). When driven, the planetary gear (1313) drives the second cage (1315) to rotate.

9. The transmission component of the electromechanical brake according to claim 4, characterized in that: The pin (1325) is fitted with a bearing (13251), which is located on the upper and lower sides of the large gear (1311). The pin (1325) is movably connected to the large gear (1311) through the bearing (13251).

10. An electromechanical brake, characterized in that: The transmission mechanism assembly (1) according to any one of claims 1 to 9 is driven to have a caliper body (2) connected to a bracket (3).

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