Integrated multifunctional gearbox

Abstract

The present invention discloses an integrated multifunctional gearbox, comprising a housing, an input portion connected to a power supply device, and an output shaft connected to a transmission device, wherein a functional part is installed on the output shaft, and the functional part is selected from at least one of a connecting part with a connection and a slipping function and a damping part with a damping function. The gearbox of the present invention integrates power transmission function, connection function, slipping function and damping function, which not only improves the functionality of the gearbox, but also greatly reduces the weight, volume and production cost of the entire application system, so that the application system has the advantages of light weight, small volume, small space occupation and low production cost, which is conducive to its overall production, processing and installation layout, and well meets the development needs of application products.

Description

Technical Field

[0001] The invention relates to the technical field of gear boxes, and in particular provides an integrated multifunctional gear box. Background Art

[0002] The electric tailgate strut system of automobiles usually includes: motor, gearbox, transmission device (such as screw) and strut, and in order to achieve the gearbox to accurately and safely transmit power to the transmission device, coupling, damper and clutch and other protective devices are usually installed between the gearbox and the transmission device. However, due to the installation of more protective devices, the overall volume of the electric tailgate strut system of automobiles will be larger, occupy more space, and the production cost is high, which cannot well meet the development needs of modern new energy electric vehicles.

[0003] In view of this, the present invention is proposed. Summary of the invention

[0004] In order to overcome the above-mentioned defects, the present invention provides an integrated multifunctional gearbox, which not only has multiple functions but also has a reasonable and compact structure, so that the overall application system has the advantages of light weight, small size, small space occupation and low production cost, which is conducive to the production, processing and installation layout of the application system.

[0005] The technical solution adopted by the present invention to solve its technical problems is: an integrated multifunctional gearbox, including a box body, an input part connected to a power supply device, and an output shaft connected to a transmission device, and a functional part is installed on the output shaft, and the functional part is selected from at least one of a connecting part with connecting and slipping functions and a damping part with a damping function.

[0006] As a further improvement of the present invention, the functional parts are selected from connecting parts and damping parts.

[0007] As a further improvement of the present invention, the connecting member has a spline sleeve that can be positioned and sleeved on the transmission device, the spline sleeve is tightly fitted in the output shaft, and a friction spring is also sleeved between the spline sleeve and the output shaft.

[0008] As a further improvement of the present invention, the output shaft is provided with a mounting groove extending along the axial direction thereof and opening on one axial end surface thereof, and the spline sleeve is tightly fitted and embedded in the mounting groove;

[0009] Correspondingly, the friction spring sheet is sleeved between the mounting groove and the spline sleeve.

[0010] As a further improvement of the present invention, the damping member comprises a flange outer ring, a damping inner ring, an inner torsion spring and an outer torsion spring, wherein the flange outer ring is sleeved on the outside of the output shaft and can provide a supporting force to the output shaft, and at the same time, one axial side of the flange outer ring is also fixedly connected to the box body; the damping inner ring is built into the flange outer ring, and the damping inner ring is also sleeved on the outside of the output shaft; the inner torsion spring is tightly embraced on the outer wall of the output shaft, and the torsion foot of the inner torsion spring is also hooked on the damping inner ring; the outer torsion spring is tightly embraced on the outer wall of the damping inner ring, and the torsion foot of the outer torsion spring is also hooked on the flange outer ring, and in addition, the outer torsion spring has an opposite rotation direction to that of the inner torsion spring.

[0011] As a further improvement of the present invention, the inner diameter of the outer ring of the flange matches the outer diameter of the output shaft;

[0012] A receiving ring groove extending along the circumference of the flange outer ring is also recessed on the inner wall of the flange outer ring, and the damping inner ring, the inner torsion spring and the outer torsion spring are all installed in the receiving ring groove.

[0013] As a further improvement of the present invention, a cover is provided, which is detachably positioned and installed on the other axial side of the flange outer ring facing away from the housing, and the cover is provided with a through hole capable of exposing the spline sleeve and the output shaft.

[0014] The beneficial effects of the present invention are as follows: ① The gearbox of the present invention not only has the power transmission function, but also has the newly added connection, slipping and damping functions, which not only improves the functionality of the gearbox, but also greatly reduces the overall weight, volume and production cost of the application system (such as the electric support rod system of the car tailgate), so that the application system has the advantages of light weight, small volume, small space occupation and low production cost, which is beneficial to its overall production, processing and installation layout, and well meets the development needs of application products. ② The use functions of the gearbox of the present invention can be combined and transformed according to user needs, thereby making the applicability of the gearbox better. ③ The reference working value of the connecting part of the present invention, the geometric shape and reference working value of the damping part, etc. can all be set according to product requirements, thereby further broadening the applicability of the gearbox in application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the first embodiment of the integrated multifunctional gearbox of the present invention;

[0016] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of the gearbox shown;

[0017] Figure 3 for Figure 1The schematic diagram of the assembly structure when the gear box and the motor are assembled together;

[0018] Figure 4 It is a structural schematic diagram of the second embodiment of the integrated multifunctional gearbox of the present invention;

[0019] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of the gearbox shown.

[0020] Combined with the accompanying drawings, the following description is given:

[0021] 1—housing; 2—input part; 3—output shaft; 4—connecting piece; 40—spline sleeve; 41—friction spring; 5—damping piece; 50—flange outer ring; 51—damping inner ring; 52—internal torsion spring; 53—external torsion spring; 500—receiving ring groove; 6—cover. DETAILED DESCRIPTION

[0022] The following describes the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0023] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the art, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0024] Embodiment 1:

[0025] Please see attached Figure 1 To Attachment Figure 3 The figures are respectively a schematic diagram of the structure of the first embodiment of the integrated multifunctional gearbox of the present invention, a schematic diagram of the cross-sectional structure, and a schematic diagram of the assembly structure when the integrated multifunctional gearbox is assembled with a motor.

[0026] The integrated multifunctional gearbox described in the present invention includes a housing 1 (in this example, the outer ring gear is regarded as a part of the housing), an input part 2 (an input shaft or an input gear may be used) for connecting to a power supply device (such as a motor M), and an output shaft 3 for connecting to a transmission device (such as a screw). In particular, a functional part is installed on the output shaft 3, and the functional part is selected from at least one of a connecting part 4 with connecting and slipping functions and a damping part 5 with a damping function.

[0027] In this embodiment, preferably, the functional parts are connecting parts 4 and damping parts 5.

[0028] In this embodiment, preferably, the connecting member 4 has a spline sleeve 40 (internal spline structure) that can be positioned and sleeved on the transmission device, the spline sleeve 40 is tightly fitted in the output shaft 3, and a friction spring sheet 41 is also installed between the spline sleeve 40 and the output shaft 3.

[0029] Further preferably, a mounting groove extending along the axial direction and opening on one axial end face is provided on the output shaft 3, and the spline sleeve 40 is tightly fitted in the mounting groove; correspondingly, the friction spring sheet 41 is sleeved between the mounting groove and the spline sleeve 40.

[0030] In this embodiment, preferably, the damping member 5 comprises a flange outer ring 50, a damping inner ring 51, an inner torsion spring 52 and an outer torsion spring 53, wherein the flange outer ring 50 is sleeved outside the output shaft 3 and can provide a supporting force to the output shaft 3, and at the same time, one axial side of the flange outer ring 50 is also fixedly connected to the box body 1, and the fixing method between the flange outer ring 50 and the box body 1 can be a welding fixing method or an integrated connection method; The damping inner ring 51 is built into the flange outer ring 50, and the damping inner ring 51 is also simultaneously sleeved on the outside of the output shaft 3; the inner torsion spring 52 is tightly embraced on the outer wall of the output shaft 3, and the torsion foot of the inner torsion spring 52 is also hooked on the damping inner ring 51; the outer torsion spring 53 is tightly embraced on the outer wall of the damping inner ring 51, and the torsion foot of the outer torsion spring 53 is also hooked on the flange outer ring 50. In addition, the outer torsion spring 53 has an opposite rotation direction to that of the inner torsion spring 52.

[0031] Further preferably, the inner diameter of the flange outer ring 50 matches the outer diameter of the output shaft 3 to provide support for the output shaft; the outer wall shape of the flange outer ring is not unique and can be designed according to product requirements;

[0032] In addition, a receiving annular groove 500 extending along the circumference thereof is recessed on the inner wall of the flange outer ring 50 , and the damping inner ring 51 , the inner torsion spring 52 and the outer torsion spring 53 are all installed in the receiving annular groove 500 .

[0033] Further preferably, a cover 6 is provided, which is detachably positioned and installed on the other axial side of the flange outer ring 50 facing away from the housing 1 , and the cover 6 is also provided with a through hole capable of exposing the spline sleeve 40 and the output shaft 3 .

[0034] Embodiment 2:

[0035] Please see attached Figure 4 To Attachment Figure 5The figures are respectively a schematic structural diagram and a schematic cross-sectional structural diagram of the second embodiment of the integrated multifunctional gearbox according to the present invention.

[0036] The gearbox structure shown in Example 2 is basically the same as the gearbox structure shown in Example 1, and the main difference is that the outer wall shape of the flange outer ring 50 shown in Example 2 is different from the outer wall shape of the flange outer ring 50 shown in Example 1. The difference in the outer wall shape of the flange outer ring 50 is mainly determined by product design requirements. Of course, this difference in the outer wall shape also further broadens the applicability of the gearbox in application.

[0037] According to the structural structure of the gearbox of the present invention, the gearbox has not only the power transmission function, but also the connection, slip and damping functions. The working principle of the gearbox to realize the connection, slip and damping functions is as follows:

[0038] a) Realizing the connection and slipping function: After the gearbox is assembled, there is static friction between the output shaft 3, the friction spring 41 and the spline sleeve 40, and the static friction between the three can be adjusted by adjusting the interference amount of the friction spring 41. When working normally, the power output by the motor will drive the friction spring 41 and the spline sleeve 40 to perform forward or reverse motion through the output shaft 3, and when manually operated, that is, when the transmission device drives the output shaft 3 in turn, the power output by the transmission device will drive the output shaft 3 to perform forward or reverse motion through the spline sleeve 40 and the friction spring 41, but if the sliding friction (i.e. resistance) between the spline sleeve 40 and the friction spring 41 is greater than the set value of the static friction, the spline sleeve 40 will slip and idle, so that it is not easy to cause damage to the teeth inside the gearbox.

[0039] b) Realizing damping function: In the present invention, the torque of the damping element 5 can be adjusted (e.g., set to 0.1 Nm) by coordinating the torque of the inner torsion spring 52 and the outer torsion spring 53, the friction force of the inner torsion spring 52 holding the outer wall of the output shaft 3, and the friction force of the outer torsion spring 53 holding the outer wall of the damping inner ring 51. When the motor drives the output shaft 3 to rotate forward, the inner torsion spring 52 will hold the output shaft 3 more and more tightly, and correspondingly, the outer torsion spring 53 will hold the damping inner ring 51 more and more loosely, and the damping inner ring 51 can rotate under the drive of the inner torsion spring 52; and when the motor drives the output shaft 3 to rotate reversely, the inner torsion spring 52 will hold the output shaft 3 more and more loosely, and the outer torsion spring 53 will hold the damping inner ring 51 more and more tightly. In this reverse process, as long as the rotational power of the output shaft 3 is greater than the torque of the damping member 5, the output shaft 3 can rotate. As can be seen from the above, the damping member 5 of the present invention belongs to a bidirectional damper.

[0040] To sum up, the gearbox described in the present invention integrates power transmission function, connection function, slipping function and damping function, which not only improves the functionality of the gearbox, but also greatly reduces the overall weight, volume and production cost of the application system (such as the electric support rod system of the tailgate of a car). The application system has the advantages of light weight, small volume, small space occupation and low production cost, which is beneficial to its overall production, processing and installation layout, and well meets the development needs of application products.

[0041] The above description is only a preferred embodiment of the present invention, but is not intended to limit the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An integrated multifunctional gearbox, comprising a housing (1), an input portion (2) for connecting to a power supply device, and an output shaft (3) for connecting to a transmission device, characterized in that: A functional part is installed on the output shaft (3), and the functional part is selected from a connecting part (4) with connecting and sliding functions and a damping part (5) with a damping function; The connecting member (4) has a spline sleeve (40) that can be positioned and sleeved on the transmission device, the spline sleeve (40) is tightly fitted and embedded in the output shaft (3), and a friction spring sheet (41) is also sleeved between the spline sleeve (40) and the output shaft (3); The output shaft (3) is provided with a mounting groove extending along the axial direction thereof and opening on one axial end surface thereof, and the spline sleeve (40) is tightly fitted and embedded in the mounting groove; correspondingly, the friction spring sheet (41) is sleeved between the mounting groove and the spline sleeve (40); The damping member (5) comprises a flange outer ring (50), a damping inner ring (51), an inner torsion spring (52) and an outer torsion spring (53), wherein the flange outer ring (50) is sleeved outside the output shaft (3) and can provide a supporting force to the output shaft (3), and an axial side of the flange outer ring (50) is also fixedly connected to the housing (1); the damping inner ring (51) is built into the flange outer ring (50), and the damping inner ring (52) is 51) is also simultaneously sleeved on the outside of the output shaft (3); the inner torsion spring (52) is tightly embraced on the outer wall of the output shaft (3), and the torsion foot of the inner torsion spring (52) is also hooked on the damping inner ring (51); the outer torsion spring (53) is tightly embraced on the outer wall of the damping inner ring (51), and the torsion foot of the outer torsion spring (53) is also hooked on the flange outer ring (50), and in addition, the outer torsion spring (53) and the inner torsion spring (52) have opposite rotation directions.

2. The integrated multifunctional gearbox according to claim 1, characterized in that: The functional parts are selected from connecting parts (4) and damping parts (5).

3. The integrated multifunctional gearbox according to claim 1, characterized in that: The inner diameter of the flange outer ring (50) matches the outer diameter of the output shaft (3); a receiving ring groove (500) extending along its circumference is also recessed on the inner wall of the flange outer ring (50), and the damping inner ring (51), the inner torsion spring (52) and the outer torsion spring (53) are all installed in the receiving ring groove (500).

4. The integrated multifunctional gearbox according to claim 1, characterized in that: A cover (6) is also provided, and the cover (6) is detachably positioned and installed on the other axial side of the flange outer ring (50) facing away from the housing (1), and the cover (6) is also provided with a through hole capable of exposing the spline sleeve (40) and the output shaft (3).

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