A kind of integral grease injection device for EPB power head gear

Abstract

This application relates to the technical field of grease injection equipment, and provides a grease injection device for the integral gears of an EPB power head, including a grease injection assembly. The assembly has a first grease injection hole, a second grease injection hole, and a third grease injection hole for grease injection. A double gear and a transmission gear are respectively assembled inside the power head housing, and the transmission gear has a central hole. The first grease injection hole is used to connect to the grease-coated surface of the double gear, the second grease injection hole is used to connect to the grease-coated surface of the transmission gear, and the third grease injection hole is used to connect to the central hole of the transmission gear. This grease injection device for the integral gears of an EPB power head can reduce grease contamination by external impurities and reduce the assembly difficulty of the gears inside the power head housing.

Description

Technical Field

[0001] This application relates to the technical field of grease injection equipment, and in particular to a grease injection device for integral gears of EPB power heads. Background Technology

[0002] The EPB power head is the core actuator of the electronic parking brake system. It mainly consists of a power head housing, gear set, motor and other structures. It is used to convert the motor power into parking braking force to realize the vehicle parking braking function. It is widely used in various passenger cars and new energy vehicles. Its operational stability directly affects the vehicle parking safety and reliability.

[0003] During the manufacturing process of the EPB power head, its internal gears, as core transmission components, need to be coated with grease to form a lubricating protective film, reduce tooth surface friction and wear, reduce operating noise, and avoid tooth surface scuffing failure, thereby ensuring the service life of the gears and the overall working performance of the power head.

[0004] In traditional manufacturing processes, each gear is typically coated with grease individually before being assembled into the power head housing. However, in actual production, the smooth surfaces of the greased gears increase the difficulty of assembly, and the grease easily detaches during assembly, contaminating the assembly equipment table or the outer wall of the power head housing, increasing cleaning costs. Furthermore, the grease is easily contaminated with dust and impurities from the air during assembly, leading to contamination and affecting lubrication. Therefore, further improvements are needed. Summary of the Invention

[0005] In order to reduce the contamination of grease by external impurities and to reduce the difficulty of gear assembly, this application provides an integral grease injection device for EPB power head gears.

[0006] The technical solution provided in this application for an integral grease injection device for EPB power head gears is as follows: A grease injection device for an EPB power head gear includes a grease injection assembly. The grease injection assembly has a first grease injection hole, a second grease injection hole, and a third grease injection hole for grease injection. A double gear and a transmission gear are respectively assembled inside the power head housing. The transmission gear has a central hole. The first grease injection hole is used to connect the grease-coated surface of the double gear, the second grease injection hole is used to connect the grease-coated surface of the transmission gear, and the third grease injection hole is used to connect the central hole of the transmission gear.

[0007] By adopting the above technical solution, the double gear and the transmission gear are pre-assembled into the power head housing before grease injection. During grease injection, the grease injection assembly is pressed onto the power head housing, and a certain amount of grease is injected into the first grease injection hole, the second grease injection hole, and the third grease injection hole, respectively. This completes the grease injection operation on the grease-coated surface of the double gear, the grease-coated surface of the transmission gear, and the center hole of the transmission gear, reducing the possibility of grease contamination by external impurities during the grease injection process, reducing the assembly difficulty of each gear, and improving the assembly quality and efficiency of the EPB power head.

[0008] Optionally, it also includes a bracket assembly, on which a translation cylinder is provided, a translation plate is connected to the translation cylinder, and a lifting cylinder is provided on the translation plate. The grease injection assembly is connected to the piston rod of the lifting cylinder.

[0009] By adopting the above technical solution, the combination of translation cylinder and lifting cylinder is used to realize the translation and lifting of the grease injection assembly, thereby improving the mobility of the grease injection assembly.

[0010] Optionally, the grease injection assembly is connected to an elastic probe, one end of which is connected to a conductive wire; a motor is installed inside the power head housing, and the motor has an electrode contact that abuts against the elastic probe; the output shaft of the motor is connected to an output gear, and the output gear and the double gear, as well as the double gear and the transmission gear, mesh and transmit power.

[0011] By adopting the above technical solution, the motor, output gear, double gear, and transmission gear are pre-assembled into the power head housing. During grease injection, the grease injection assembly is pressed against the power head housing. At this time, the elastic probe abuts against the electrode contacts of the motor, and electrical energy is supplied to the motor through the conductive wire to start the motor. This allows the double gear and transmission gear to rotate during the grease injection process, improving the uniformity of grease injection to the double gear and transmission gear, and enhancing the grease injection effect.

[0012] Optionally, the bottom wall of the grease injection assembly is provided with a groove for the double gear to be embedded in, a floating pressure plate is provided in the groove, and a return spring is provided between the floating pressure plate and the grease injection assembly. The return spring normally forces the floating pressure plate to abut against the surface of the double gear; an air passage connector is provided on the floating pressure plate.

[0013] By adopting the above technical solution, when the grease injection assembly is pressed into the power head housing, the double gears are embedded in the grooves, and the floating pressure plate abuts against the double gears. This design serves two purposes: First, the floating pressure plate abuts against the double gears, limiting their movement and preventing axial movement. This maintains the meshing relationship between the double gears and the transmission gears, and between the double gears and the output gears, ensuring that each gear can rotate during grease injection. Second, the embedding of the double gears in the grooves creates a spatial enclosure around the grease-applied surfaces. Furthermore, the floating pressure plate abuts against the surfaces of the double gears, preventing grease from flowing onto surfaces that do not require grease injection, thus improving grease injection accuracy.

[0014] Optionally, the floating pressure plate includes a floating part and a rotating part. The floating part is slidably mounted on the grease injection assembly, and the rotating part is rotatably mounted on the bottom of the floating part. The double gear has multiple connecting ribs, and a void is formed between two adjacent connecting ribs. The rotating part covers all voids.

[0015] By adopting the above technical solution, when the motor drives the double gear to rotate during the grease injection process, the rotating part abuts against the double gear, reducing the resistance during the rotation of the double gear. Secondly, the rotating part covers all empty areas, preventing the possibility of grease flowing into the empty areas during the grease injection process, reducing grease waste, and improving grease injection accuracy.

[0016] Optionally, the grease injection assembly includes a connecting plate and a docking plate, with the docking plate disposed at the bottom of the connecting plate; the top wall of the docking plate is respectively provided with a first grease reservoir and a second grease reservoir, one end of the first grease injection hole is connected to the first grease reservoir, and the other end penetrates through the bottom wall of the docking plate; one end of the second grease injection hole is connected to the second grease reservoir, and the other end penetrates through the bottom wall of the docking plate; the connecting plate is respectively provided with a first oil circuit connector connected to the first grease reservoir and a second oil circuit connector connected to the second grease reservoir.

[0017] By adopting the above technical solution, the connection plate and the mating plate cooperate to form a sealed first grease reservoir and a second grease reservoir. Grease is injected into the first grease reservoir and the second grease reservoir through the first oil circuit connector and the second oil circuit connector, respectively. The grease can flow through the first grease injection hole to the grease-coated surface of the double gear and through the second grease injection hole to the grease-coated surface of the transmission gear. With the rotation of the double gear and the transmission gear, the uniformity of grease injection is improved.

[0018] Optionally, the first grease reservoir is annular around the central axis of the double gear, and multiple first grease injection holes are arranged at intervals around the central axis of the first grease reservoir; the second grease reservoir is arc-shaped around the central axis of the transmission gear, and multiple second grease injection holes are arranged at intervals around the central axis of the second grease reservoir.

[0019] By adopting the above technical solution and setting multiple first grease injection holes and multiple second grease injection holes, the grease injection efficiency and grease injection uniformity are improved.

[0020] Optionally, a booster plate is slidably installed in both the first and second grease tanks, and the surface of the booster plate is provided with a through hole for the first or second oil circuit connector to pass through; the grease injection assembly is provided with a drive component for driving the booster plate to reciprocate up and down.

[0021] By adopting the above technical solution, the resistance is relatively large and the flow rate is slow when grease is poured from the first grease tank into the first grease injection hole and from the second grease tank into the second grease injection hole. During the grease injection process, the driving component forces the pusher plate to reciprocate up and down. When the pusher plate moves down, it can squeeze the grease in the first or second grease tank downwards, increasing the grease flow rate. When the pusher plate moves up, the first and second oil circuit connectors can replenish grease to the first and second grease tanks. This process is repeated, which greatly improves the overall grease injection efficiency and reduces the pressure on the first and second oil circuit connectors.

[0022] Optionally, the rotating part is coaxially connected to a rotating rod, and the push plate is connected to a sliding rod. One end of both the rotating rod and the sliding rod extends out of the grease injection assembly. The driving component includes a driving shaft and a connecting rod. The driving shaft is rotatably mounted on the grease injection assembly and is circumferentially linked to the rotating rod. An eccentric rod is provided on the driving shaft. One end of the connecting rod is hinged to the eccentric rod, and the other end is hinged to the sliding rod.

[0023] By adopting the above technical solution, the drive shaft and the rotating rod are circumferentially linked, meaning that the rotation of the rotating rod can drive the drive shaft to rotate synchronously. The grease injection process drives the double gear to rotate, which in turn drives the rotating part to rotate. The rotating part drives the drive shaft to rotate through the rotating rod, forcing the eccentric rod to "revolve" around the central axis of the drive shaft, thereby realizing the reciprocating lifting and lowering of the booster plate and greatly improving the operational convenience of the overall structure.

[0024] Optionally, the bottom wall of the rotating part is fixedly connected with multiple mating plates, and when the rotating part abuts against the double gear, the mating plates are embedded in the empty area of ​​the double gear.

[0025] By adopting the above technical solution, the docking piece is embedded in the empty area to achieve "meshing" between the rotating part and the double gear. This enables the rotating part to rotate when the motor drives the double gear to rotate, thereby realizing the reciprocating lifting and lowering of the booster plate and improving the overall ease of operation.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. Before grease injection, the double gear and transmission gear are pre-assembled into the power head housing. During grease injection, the grease injection assembly is pressed onto the power head housing, and a certain amount of grease is injected into the first, second, and third grease injection holes respectively. This completes the grease injection operation on the grease-coated surfaces of the double gear, the grease-coated surfaces of the transmission gear, and the center hole of the transmission gear, reducing the possibility of grease contamination by external impurities during the grease injection process, reducing the assembly difficulty of each gear, and improving the assembly quality and efficiency of the EPB power head.

[0027] 2. The motor, output gear, double gear, and transmission gear are pre-assembled into the power head housing. During grease injection, the grease injection assembly is pressed against the power head housing. At this time, the elastic probe abuts against the motor's electrode contacts, and electrical energy is supplied to the motor through the conductive wire to start the motor. This allows the double gear and transmission gear to rotate during the grease injection process, improving the uniformity of grease injection on the double gear and transmission gear, and enhancing the grease injection effect.

[0028] 3. Due to the design of the booster plate, the grease faces significant resistance and a slow flow rate when flowing from the first grease reservoir into the first grease injection hole and from the second grease reservoir into the second grease injection hole. During the grease injection process, the booster plate is forced to reciprocate up and down using a drive component. When the booster plate moves downward, it can squeeze the grease in the first or second grease reservoir downward, increasing the grease flow rate. When the booster plate moves upward, the first and second oil circuit connectors can replenish grease to the first and second grease reservoirs. This process is repeated, greatly improving the overall grease injection efficiency and reducing the pressure on the first and second oil circuit connectors. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of Example 1; Figure 2 This is a schematic diagram illustrating the structure of the double gear and the transmission gear in Example 1; Figure 3 This is a schematic diagram illustrating the structure of the connecting plate in Embodiment 1; Figure 4 yes Figure 3 Sectional view along the middle AA direction; Figure 5 yes Figure 4 Schematic diagram of the structure in the middle BB direction; Figure 6 yes Figure 4 A cross-sectional view along the CC direction; Figure 7 This is a partial cross-sectional view of Embodiment 1 illustrating the floating pressure plate; Figure 8 This is a partial cross-sectional view of the booster plate in Embodiment 2; Figure 9 This is a partial cross-sectional view of the sliding rod in Embodiment 2; Figure 10 This is a schematic diagram illustrating the structure of the driving component in Example 2; Figure 11 This is a partial cross-sectional view of Embodiment 3, showing the floating part and the rotating part.

[0030] Explanation of reference numerals in the attached drawings: 1. Grease injection assembly; 11. First grease injection hole; 12. Second grease injection hole; 13. Third grease injection hole; 14. Elastic probe; 15. Groove; 16. Connecting plate; 161. First oil passage connector; 162. Second oil passage connector; 163. Grease injection rod; 17. Butt plate; 171. First grease reservoir; 172. Second grease reservoir; 173. Positioning part; 18. Annular O-ring; 19. Nozzle-type O-ring; 2. Bracket assembly; 21. Translation cylinder; 22. Translation plate; 23. Lifting cylinder; 3. Floating pressure plate; 31. Return spring; 32. Air passage connector; 3 3. Floating part; 34. Rotating part; 341. Connecting piece; 35. Rotating rod; 351. Air passage; 352. First sleeve; 353. Second sleeve; 36. Guide rod; 4. Push plate; 41. Perforation; 42. Sliding rod; 43. Sliding plate; 5. Driving component; 51. Drive shaft; 511. Eccentric rod; 52. Connecting rod; 6. Receiving platform; 7. Power head housing; 71. Double gear; 711. Connecting rib; 712. Empty area; 72. Transmission gear; 721. Center hole; 722. Grease coating surface; 73. Motor; 731. Electrode contact; 74. Output gear. Detailed Implementation

[0031] The following combination Figures 1-11 This application will be described in further detail.

[0032] Example 1: This application discloses an integral grease injection device for EPB power head gear.

[0033] Reference Figure 1 , Figure 2 A grease injection device for an EPB power head gear includes a grease injection assembly 1 and a support assembly 2. A translation cylinder 21, which is a rodless cylinder, is mounted on the support assembly 2. A translation plate 22 is fixedly connected to the moving end of the translation cylinder 21. A lifting cylinder 23, which is a three-axis cylinder, is fixedly mounted on the translation plate 22. The grease injection assembly 1 is fixedly mounted on the piston rod of the lifting cylinder 23.

[0034] The grease injection assembly 1 is used to inject grease into the power head housing 7. The power head housing 7 is equipped with a motor 73, an output gear 74, a double gear 71, and a transmission gear 72. The motor 73 is fixedly mounted on the inner wall of the power head housing 7, and the output gear 74 is coaxially fixed to the output shaft of the motor 73. Both the double gear 71 and the transmission gear 72 are rotatably mounted on the inner wall of the power head housing 7. The transmission gear 72 has a central hole 721. The output gear 74 and the double gear 71, as well as the double gear 71 and the transmission gear 72, mesh and transmit power.

[0035] It should be noted that, before grease injection in this embodiment, the motor 73, output gear 74, double gear 71, and transmission gear 72 have all been preliminarily assembled into the power head housing 7. Furthermore, this embodiment has three specific grease injection locations within the power head housing 7: the grease-coated surface 722 of the double gear 71, the grease-coated surface 722 of the transmission gear 72, and the center hole 721 of the transmission gear 72.

[0036] Reference Figure 3 , Figure 4 , Figure 5 The grease injection assembly 1 includes a connecting plate 16 and a mating plate 17. The connecting plate 16 is fixedly installed on the piston rod of the lifting cylinder 23, and the mating plate 17 is fixedly installed on the bottom wall of the connecting plate 16. The connecting plate 16 and the lifting cylinder 23, as well as the connecting plate 16 and the mating plate 17, can be connected by bolts.

[0037] The top wall of the docking plate 17 is provided with a first grease reservoir 171 and a second grease reservoir 172. The first grease reservoir 171 is annular around the central axis of the double gear 71. The docking plate 17 is provided with a first grease injection hole 11, and multiple first grease injection holes 11 are arranged at intervals around the central axis of the first grease reservoir 171. One end of the first grease injection hole 11 is connected to the first grease reservoir 171, and the other end passes through the bottom wall of the docking plate 17 to connect the grease-coated surface 722 of the double gear 71. Two annular O-rings 18 are embedded between the connecting plate 16 and the docking plate 17. The two annular O-rings 18 surround the first grease reservoir 171 to seal the first grease reservoir 171.

[0038] The second grease reservoir 172 is arc-shaped around the central axis of the transmission gear 72. A second grease injection hole 12 is provided inside the mating plate 17, and multiple second grease injection holes 12 are arranged at intervals around the central axis of the second grease reservoir 172. One end of each second grease injection hole 12 connects to the second grease reservoir 172, and the other end penetrates the bottom wall of the mating plate 17 to connect to the grease-coated surface 722 of the transmission gear 72. A nozzle-shaped O-ring 19 is also embedded between the connecting plate 16 and the mating plate 17, surrounding the second grease reservoir 172 to seal it.

[0039] A first oil passage connector 161, a second oil passage connector 162, and a grease injection rod 163 are respectively installed on the connecting plate 16. The first oil passage connector 161, the second oil passage connector 162, and the grease injection rod 163 are all used to introduce grease. The outlet end of the first oil passage connector 161 is connected to the first grease reservoir 171, and the outlet end of the second oil passage connector 162 is connected to the second grease reservoir 172. A third grease injection hole 13 is opened in the docking plate 17. The third grease injection hole 13 penetrates the bottom wall of the docking plate 17 to connect to the center hole 721 of the transmission gear 72. The outlet end of the grease injection rod 163 passes through the third grease injection hole 13.

[0040] Reference Figure 6 In this embodiment, the motor 73 has two electrode contacts 731, and two elastic probes 14 are embedded in the mating plate 17. The two elastic probes 14 are correspondingly arranged with the two electrode contacts 731 of the motor 73. The lower end of the elastic probe 14 is in electrical contact with the corresponding electrode contact 731, and the upper end of the elastic probe 14 extends out of the connecting plate 16 and is fixedly connected to a conductive wire (not shown in the figure). With this design, the motor 73 is powered through the conductive wire, so that the double gear 71 and the transmission gear 72 can rotate during the grease injection process, improving the uniformity of grease injection.

[0041] Reference Figure 2 , Figure 4 , Figure 7 The bottom wall of the docking plate 17 is integrally formed with a positioning part 173, which is fitted into the power head housing 7. A groove 15 is formed in the bottom wall of the docking plate 17. When the docking plate 17 is pressed down against the power head housing 7 (i.e., when the positioning part 173 is embedded in the power head housing 7), the double gear 71 is embedded in the groove 15. A floating pressure plate 3 is provided in the groove 15. Multiple guide rods 36 are fixedly connected to the floating pressure plate 3. The guide rods 36 slide through the connecting plate 16. The floating pressure plate 3 is slidably installed on the connecting plate 16 via the multiple guide rods 36, allowing it to rise and fall within the groove 15.

[0042] A return spring 31 is fitted onto the outer wall of the guide rod 36. One end of the return spring 31 abuts against the connecting plate 16, and the other end abuts against the floating pressure plate 3. Under normal conditions, the floating pressure plate 3 moves downward and abuts against the surface of the double gear 71 under its own weight and the action of the return spring 31. The double gear 71 has multiple connecting ribs 711. For ease of description, the area between two adjacent connecting ribs 711 is defined as the empty area 712. The empty area 712 is the area of ​​the double gear 71 that does not require grease injection. The floating pressure plate 3 covers all empty areas 712.

[0043] An air connector 32 is installed on the floating pressure plate 3, with the outlet end of the air connector 32 facing downwards for blowing air onto the surface of the double gear 71. A venting hose (not shown in the figure) is connected to the connecting plate 16, with one end of the venting hose connected to the air connector 32 and the other end passing through the connecting plate 16 for connecting to the air supply equipment.

[0044] Reference Figure 1 The bottom of the support assembly 2 is fixedly installed with a receiving platform 6. The specific function of the receiving platform 6 is to transfer the grease injection assembly 1 after grease injection to the receiving platform 6. The receiving platform 6 can receive the remaining grease in the grease injection assembly 1, so as to avoid grease waste and grease contamination of the work surface.

[0045] The implementation principle of Embodiment 1 of this application is as follows: During grease injection, the grease injection assembly 1 is pressed onto the power head housing 7, and grease is injected through the first oil line connector 161, the second oil line connector 162, and the grease injection rod 163, thereby performing grease injection operations on the grease-coated surface 722 of the double gear 71, the grease-coated surface 722 of the transmission gear 72, and the center hole 721 of the transmission gear 72, respectively. Before grease injection, the double gear 71 and the transmission gear 72 are pre-assembled into the power head housing 7, reducing the possibility of grease contamination by external impurities during the grease injection process, reducing the assembly difficulty of each gear, and improving the assembly quality and efficiency of the EPB power head.

[0046] An annular first grease reservoir 171 and an arc-shaped second grease reservoir 172 are provided on the docking plate 17. The first grease reservoir 171 has multiple first grease injection holes 11, and the second grease reservoir 172 has multiple second grease injection holes 12. Furthermore, during the grease injection process, the motor 73 is powered through the elastic probe 14, driving the double gear 71 and the transmission gear 72 to rotate, greatly improving the uniformity of grease injection into the double gear 71 and the transmission gear 72, and enhancing the grease injection quality.

[0047] A floating pressure plate 3 is provided on the docking plate 17 so that after the grease injection assembly 1 is pressed down on the power head housing 7, the floating pressure plate 3 can form an abutment relationship with the double gear 71, thereby limiting the double gear 71 and the transmission gear 72, reducing the possibility of the double gear 71 and the transmission gear 72 moving along their own axial direction during the grease injection process, and thus realizing that the double gear 71 and the transmission gear 72, and the double gear 71 and the output gear 74 maintain a meshing relationship during the grease injection process.

[0048] Secondly, the floating pressure plate 3 abuts against the double gear 71, thereby covering the parts of the double gear 71 that do not require grease, preventing grease from flowing onto the surfaces of the double gear 71 that do not require grease, improving grease injection accuracy, and avoiding grease waste. Thirdly, when the grease injection assembly 1 is lifted off the assembly, air is blown onto the double gear 71 through the air connector 32 on the floating pressure plate 3, reducing the possibility that the double gear 71 may be carried off the assembly 1 by the floating pressure plate 3 during the lifting process, and improving the stability of the overall structure.

[0049] Example 2: This application discloses an integral grease injection device for EPB power head gear.

[0050] The difference between the integral grease injection device for EPB power head gear disclosed in this application and Embodiment 1 is that: Reference Figure 8 , Figure 9 , Figure 10 In this embodiment, a booster plate 4 is slidably installed in both the first grease tank 171 and the second grease tank 172. The booster plate 4 in the first grease tank 171 is adapted to the shape of the first grease tank 171, and the booster plate 4 in the second grease tank 172 is adapted to the shape of the second grease tank 172. Except for the difference in shape, the booster plate 4 in the first grease tank 171 and the booster plate 4 in the second grease tank 172 have the same function. The following description uses the booster plate 4 in the first grease tank 171 as an example. The booster plate 4 in the second grease tank 172 can be obtained in the same way.

[0051] In this embodiment, the outlet end of the first oil circuit connector 161 partially extends into the first grease reservoir 171. A through hole 41 is provided on the surface of the booster plate 4 for either the first oil circuit connector 161 or the second oil circuit connector 162 to pass through. A sliding plate 43 is mounted on the connecting plate 16. Multiple sliding rods 42 are mounted on the surface of the booster plate 4. The lower end of each sliding rod 42 is fixedly connected to the booster plate 4. The upper end of each sliding plate 43 passes through the connecting plate 16 and is fixedly connected to the sliding plate 43.

[0052] The grease injection assembly 1 is equipped with a drive component 5 for reciprocating the lifting and lowering of the booster plate 4. In this embodiment, the drive component 5 includes a drive shaft 51 and a connecting rod 52. The drive shaft 51 is rotatably mounted on the connecting plate 16, and an eccentric rod 511 is fixedly mounted on the drive shaft 51. The axial direction of the eccentric rod 511 is parallel to the axial direction of the drive shaft 51, that is, when the drive shaft 51 rotates, it can drive the eccentric rod 511 to "revolve" around the central axis of the drive shaft 51. One end of the connecting rod 52 is hinged to the eccentric rod 511, and the other end is hinged to the sliding plate 43 of the sliding rod 42. In this embodiment, a drive motor 73 (not shown in the figure) is fixedly mounted on the connecting plate 16, and the output shaft of the drive motor 73 is coaxially connected to the drive shaft 51.

[0053] The implementation principle of Embodiment 2 of this application is as follows: A booster plate 4 is installed in the first grease tank 171 and the second grease tank 172. During the grease injection process, the drive shaft 51 is driven to rotate. With the cooperation of the eccentric rod 511 and the connecting rod 52, the sliding plate 43 is driven to reciprocate up and down, that is, the booster plate 4 is driven to reciprocate up and down in the first grease tank 171 or the second grease tank 172. When the booster plate 4 moves downward, it can squeeze the grease in the first grease tank 171 or the second grease tank 172 downward, increasing the grease flow rate. When the booster plate 4 moves upward, the first oil circuit connector 161 and the second oil circuit connector 162 can replenish grease to the first grease tank 171 and the second grease tank 172 (during the lifting and lowering of the booster plate 4, the first oil circuit connector 161 and the second oil circuit connector 162 continuously supply grease). This process is repeated, which greatly improves the overall grease injection efficiency and reduces the pressure on the first oil circuit connector 161 and the second oil circuit connector 162.

[0054] Secondly, in practical applications, after grease injection is completed, the first oil line connector 161 and the second oil line connector 162 are shut off first to stop the supply of grease to the first grease reservoir 171 and the second grease reservoir 172. At this time, by using the lifting of the booster plate 4, the external air pressure can force the remaining grease in the first grease injection hole 11 or the second grease injection hole 12 back into the first grease reservoir 171 or the second grease reservoir 172, thereby reducing the leakage of grease from the grease injection assembly 1 after grease injection and improving overall stability.

[0055] Example 3: This application discloses an integral grease injection device for EPB power head gears.

[0056] The difference between the integral grease injection device for EPB power head gear disclosed in this application and Embodiment 2 is that: Reference Figure 11 In this embodiment, the floating pressure plate 3 includes a floating part 33 and a rotating part 34. The guide rod 36 is fixedly installed on the floating part 33, and the rotating part 34 is rotatably installed on the bottom of the floating part 33. The rotating part 34 is used to abut against the double gear 71. A plurality of mating pieces 341 are fixedly connected to the bottom wall of the rotating part 34. When the rotating part 34 abuts against the double gear 71, the mating pieces 341 are embedded in the empty area 712 of the double gear 71.

[0057] A rotating rod 35 is coaxially connected to the rotating part 34. The upper end of the rotating rod 35 passes through the floating part 33, the docking plate 17 and the connecting plate 16 in sequence. A first bevel gear (not shown in the figure) is coaxially connected to the upper end of the rotating rod 35. A second bevel gear (not shown in the figure) is coaxially connected to one end of the drive shaft 51. The first bevel gear and the second bevel gear mesh and drive each other so that the drive shaft 51 and the rotating rod 35 are linked circumferentially. That is, when the rotating part 34 rotates, it can drive the drive shaft 51 to rotate.

[0058] It should be noted that in this embodiment, the rotating rod 35 is a hollow tube, and an air passage 351 is formed inside the rotating rod 35. The lower end of the air passage 351 penetrates the bottom wall of the rotating part 34. The air passage connector 32 is connected to the upper end of the rotating rod 35 (the air passage connector 32 is not shown in the figure of this embodiment), and the rotating rod 35 and the air passage connector 32 can be connected by a rotary joint.

[0059] In this embodiment, to accommodate the lifting and lowering of the floating pressure plate 3 and maintain the meshing relationship between the first bevel gear and the second bevel gear, the rotating rod 35 is a telescopic rod structure. Specifically, the rotating rod 35 includes a first sleeve 352 and a second sleeve 353. The first sleeve 352 is rotatably mounted on the docking plate 17, and its upper end passes through the connecting plate 16 to connect the first bevel gear and the air connector 32. One end of the second sleeve 353 is coaxially fixed to the rotating part 34, and the other end passes through the floating part 33 and is inserted into the first sleeve 352. The first sleeve 352 and the second sleeve 353 are slidably connected by a keyway.

[0060] The implementation principle of Embodiment 3 of this application is as follows: During grease injection, the grease injection assembly 1 is pressed down onto the power head housing 7. At this time, the mating piece 341 is embedded in the empty area 712 of the double gear 71, realizing the "meshing" between the rotating part 34 and the double gear 71. That is, when the motor 73 in the power head housing 7 drives the double gear 71 to rotate, the rotating part 34 can follow the double gear 71 to rotate, reducing the resistance during the rotation of the double gear 71.

[0061] Secondly, when the rotating part 34 rotates, the drive shaft 51 rotates under the meshing of the first bevel gear and the second bevel gear, thereby realizing the reciprocating lifting of the booster plate 4, thus eliminating the need for the drive motor 73, reducing the overall cost, and reducing the overall weight of the grease injection assembly 1, thereby improving the ease of operation of the overall structure.

[0062] The above are preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made to the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A grease injection device for an EPB power head gear, characterized in that: The assembly includes a grease injection assembly (1), which has a first grease injection hole (11), a second grease injection hole (12) and a third grease injection hole (13) for grease injection. The power head housing (7) is equipped with a double gear (71) and a transmission gear (72), and the transmission gear (72) has a center hole (721). The first grease injection hole (11) is used to connect the grease-coated surface (722) of the double gear (71), the second grease injection hole (12) is used to connect the grease-coated surface (722) of the transmission gear (72), and the third grease injection hole (13) is used to connect the center hole (721) of the transmission gear (72).

2. The integral grease injection device for EPB power head gear according to claim 1, characterized in that: It also includes a bracket assembly (2), on which a translation cylinder (21) is provided, a translation plate (22) is connected to the translation cylinder (21), and a lifting cylinder (23) is provided on the translation plate (22). The grease injection assembly (1) is connected to the piston rod of the lifting cylinder (23).

3. The integral grease injection device for EPB power head gear according to claim 1, characterized in that: The grease injection assembly (1) is connected to an elastic probe (14), one end of which is connected to a conductive wire; the power head housing (7) is equipped with a motor (73), which has an electrode contact (731) that abuts against the elastic probe (14); the output shaft of the motor (73) is connected to an output gear (74), and the output gear (74) and the double gear (71) mesh and transmit power, as do the double gear (71) and the transmission gear (72).

4. The integral grease injection device for EPB power head gear according to claim 1, characterized in that: The bottom wall of the grease injection assembly (1) is provided with a groove (15) for the double gear (71) to be inserted. A floating pressure plate (3) is provided in the groove (15). A return spring (31) is provided between the floating pressure plate (3) and the grease injection assembly (1). The return spring (31) normally forces the floating pressure plate (3) to abut against the surface of the double gear (71). An air connector (32) is provided on the floating pressure plate (3).

5. The integral grease injection device for EPB power head gear according to claim 4, characterized in that: The floating pressure plate (3) includes a floating part (33) and a rotating part (34). The floating part (33) is slidably mounted on the grease injection assembly (1), and the rotating part (34) is rotatably mounted on the bottom of the floating part (33). The double gear (71) has multiple connecting ribs (711), and a void area (712) is formed between two adjacent connecting ribs (711). The rotating part (34) covers all void areas (712).

6. A grease injection device for an EPB power head gear according to claim 5, characterized in that: The grease injection assembly (1) includes a connecting plate (16) and a docking plate (17). The docking plate (17) is located at the bottom of the connecting plate (16). The top wall of the docking plate (17) is provided with a first grease reservoir (171) and a second grease reservoir (172). One end of the first grease injection hole (11) is connected to the first grease reservoir (171), and the other end passes through the bottom wall of the docking plate (17). One end of the second grease injection hole (12) is connected to the second grease reservoir (172), and the other end passes through the bottom wall of the docking plate (17). The connecting plate (16) is provided with a first oil circuit connector (161) connected to the first grease reservoir (171) and a second oil circuit connector (162) connected to the second grease reservoir (172).

7. A grease injection device for an EPB power head gear according to claim 6, characterized in that: The first grease reservoir (171) is annular around the central axis of the double gear (71), and multiple first grease injection holes (11) are arranged at intervals around the central axis of the first grease reservoir (171); the second grease reservoir (172) is arc-shaped around the central axis of the transmission gear (72), and multiple second grease injection holes (12) are arranged at intervals around the central axis of the second grease reservoir (172).

8. A grease injection device for an EPB power head gear according to claim 6, characterized in that: A booster plate (4) is slidably installed in both the first grease tank (171) and the second grease tank (172). The surface of the booster plate (4) is provided with a through hole (41) for the first oil circuit connector (161) or the second oil circuit connector (162) to pass through. The grease injection assembly (1) is provided with a drive component (5) for driving the booster plate (4) to move up and down.

9. A grease injection device for an EPB power head gear according to claim 8, characterized in that: The rotating part (34) is coaxially connected to a rotating rod (35), and the push plate (4) is connected to a sliding rod (42). One end of the rotating rod (35) and the sliding rod (42) both pass through the grease injection assembly (1). The driving component (5) includes a driving shaft (51) and a connecting rod (52). The driving shaft (51) is rotatably mounted on the grease injection assembly (1) and is circumferentially linked with the rotating rod (35). An eccentric rod (511) is provided on the driving shaft (51). One end of the connecting rod (52) is hinged to the eccentric rod (511), and the other end is hinged to the sliding rod (42).

10. A grease injection device for an EPB power head gear according to claim 5, characterized in that: The bottom wall of the rotating part (34) is fixedly connected with a plurality of mating pieces (341). When the rotating part (34) abuts against the double gear (71), the mating pieces (341) are embedded in the empty area (712) of the double gear (71).

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