Gear box and seat driver

Abstract

The utility model discloses a gear box and a seat driver, the gear box comprises a box body and a helical gear set, and the extending directions of the input end and the output end of the helical gear set are parallel; the box body comprises a first half box body and a second half box body, the first half box body and the second half box body are suitable for being connected in a fastened mode through bolts, and the matching face of the first half box body and the matching face of the second half box body are perpendicular to the extending direction of the input end and the output end of the bevel gear set. The seat driver comprises the gear box. The gear box has the beneficial effects that the matching surface of the box body is parallel to the extending direction of the input end and the output end of the bevel gear set, so that when the bevel gear set is meshed, the circumferential thrust generated by the bevel gear set is parallel to the matching surface of the box body, and the stability of the connecting structure of the box body can be effectively guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of automobile parts, and in particular to a gear box and a seat driver. Background Art

[0002] The horizontal driving machine (HDM) of the car seat is one of the key moving parts of the car seat position adjustment system. Commonly used car seat drivers generally include a gearbox, a lead screw and a nut assembly. A worm gear is set in the gearbox. The motor is decelerated by the gearbox and then cooperates with the lead screw through the nut assembly. Then, the linear movement of the driver along the lead screw is realized by the rotation of the nut assembly around the lead screw.

[0003] With the development of new energy vehicle technology, the adjustment range of electric seats is gradually increasing to meet the needs of users. For long-distance seat adjustment, traditional car seat horizontal actuators cannot meet the requirements of height, strength, accuracy and motion stability. Therefore, how to improve the existing seat actuator to overcome the above problems is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0004] One of the purposes of the present application is to provide a gearbox capable of solving at least one of the defects in the above-mentioned background technology.

[0005] Another object of the present application is to provide a seat driver that can solve at least one of the defects in the above-mentioned background technology.

[0006] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: a gear box, comprising a box body and a helical gear set, the extension directions of the input end and the output end of the helical gear set are parallel; the box body comprises a first half box body and a second half box body, the first half box body and the second half box body are suitable for being fastened together by bolts, and the mating surfaces of the first half box body and the second half box body are perpendicular to the extension directions of the input end and the output end of the helical gear set.

[0007] Preferably, a shock-absorbing cap is detachably mounted on the top of the box body, and the box body is suitable for making flexible contact with the seat through the shock-absorbing cap.

[0008] Preferably, a clamping portion is provided on the top of the box body, and the shock-absorbing cap is sleeved on the clamping portion and cooperated with through a clamping structure, so that the movement of the shock-absorbing cap in a direction of leaving the clamping portion is restricted.

[0009] Preferably, the engaging portion and the shock-absorbing cap are both rectangular structures, at least one pair of opposite sides of the engaging portion are provided with a engaging block, and at least one pair of opposite sides of the shock-absorbing cap are provided with a engaging groove; the shock-absorbing cap is sleeved on the engaging portion and engages with the engaging block through the engaging groove to form the limiting structure.

[0010] Preferably, the engaging portion and the shock-absorbing cap are both rectangular structures, at least one pair of opposite sides of the engaging portion are provided with a slot, and at least one pair of opposite sides of the shock-absorbing cap are provided with a block extending inwardly; the shock-absorbing cap is sleeved on the engaging portion and engages with the slot through the block to form the limiting structure.

[0011] Preferably, the clamping portion is cylindrical, and a ring-shaped protrusion or a ring-shaped groove is provided in the middle of the clamping portion along the circumferential direction; the shock-absorbing cap is sleeved on the clamping portion and forms the clamping structure by covering the ring-shaped protrusion or the ring-shaped groove.

[0012] Preferably, an extrusion surface is provided on one side of the clamping block close to the top end of the clamping portion, and the extrusion surface and / or the lower end surface of the shock-absorbing cap are configured as an inclined surface or an arc-shaped surface.

[0013] Preferably, the thickness of the first half box is greater than the thickness of the second half box, and the clamping block is formed on the clamping portion at the top of the first half box.

[0014] Preferably, the box body is in flexible contact with the seat through shock-absorbing pads at both ends of the lower part.

[0015] A seat drive comprises the above-mentioned gear box.

[0016] Compared with the prior art, the beneficial effects of this application are:

[0017] By arranging the mating surface of the box body parallel to the extension direction of the input and output ends of the helical gear set, the circumferential thrust generated by the helical gear set can be parallel to the mating surface of the box body when the helical gear set is engaged, thereby effectively ensuring the stability of the connection structure of the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] Figure 2 This is a schematic diagram of the internal structure of the first half box in the utility model.

[0020] Figure 3 It is a structural schematic diagram of the shock-absorbing cap in the utility model.

[0021] Figure 4It is a partial structural schematic diagram of the shock-absorbing cap installed on the box body in the utility model.

[0022] Figure 5 It is a schematic diagram of the cross-sectional structure of the helical gear set in the utility model in the axial direction.

[0023] In the figure: drive shaft 01, long screw 02, box body 1, first half box body 11, installation cavity 110, engaging portion 111, block 112, extrusion surface 1120, second half box body 12, mating surface 100, shock absorbing cap 13, shock absorbing pad 14, slot 130, helical gear set 2, output helical gear 21, first transition helical gear 22, second transition helical gear 24, input helical gear 26. DETAILED DESCRIPTION

[0024] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0026] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0027] The terms "including" and "having" and any variations thereof in the specification and claims of this application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0028] One aspect of the present application provides a gearbox, such as Figure 1As shown, one of the preferred embodiments includes a box body 1 that can be connected to a seat and a helical gear set 2 installed in an installation cavity 110 inside the box body 1. The extension directions of the input end and the output end of the helical gear set 2 are parallel, that is, the input end and the output end of the helical gear set 2 are located in the same plane. The box body 1 includes a first half box body 11 and a second half box body 12, and the first half box body 11 and the second half box body 12 can be fastened and connected by bolts, and the mating surface 100 of the first half box body 11 and the second half box body 12 is perpendicular to the extension direction of the input end and the output end of the helical gear set 2, thereby reducing the impact of the thrust generated by the helical gear set 2 during the meshing process on the installation structure of the first half box body 11 and the second half box body 12.

[0029] It is understandable that the specific structure of the helical gear set 2 can be designed according to actual needs, for example Figure 5 As shown, the helical gear set 2 includes an output helical gear 21, a first transition helical gear 22, a second transition helical gear 24 and an input helical gear 26 that mesh with each other in sequence. The output helical gear 21, the first transition helical gear 22, the second transition helical gear 24 and the input helical gear 26 are designed to be parallel to each other so that the input end and the output end of the entire helical gear set 2 are parallel.

[0030] For ease of understanding, the transmission process of the helical gear set 2 can be analyzed below. Figure 5 As shown in the figure, the direction indicated by the dotted arrow corresponds to the rotation direction of each bevel gear. In the process of the input bevel gear 26 rotating, the input bevel gear 26 can generate a circumferential thrust F5 toward the right at the meshing position with the second transition bevel gear 24; in the process of the second transition bevel gear 24 rotating, the second transition bevel gear 24 can generate a circumferential thrust F6 toward the left at the meshing position with the first transition bevel gear 22; in the process of the first transition bevel gear 22 rotating, the first transition bevel gear 22 can generate a circumferential thrust F7 toward the right at the meshing position with the output bevel gear 21. The directions of the circumferential thrusts F5 to F7 are parallel to the mating surface 100 of the first half case 11 and the second half case 12, that is, the directions of the circumferential thrusts F5 to F7 are perpendicular to the separation direction of the first half case 11 and the second half case 12, so the circumferential thrusts F5 to F7 will not affect the installation structure of the first half case 11 and the second half case 12, thereby ensuring the stability of the connection structure of the case 1 and avoiding fatigue loosening.

[0031] In this embodiment, Figure 1 and Figure 4 As shown, a shock-absorbing cap 13 is detachably installed on the top of the box body 1, and the box body 1 can be in contact and connected with the seat through the shock-absorbing cap 13; then, when the seat driver drives the seat to move, the shock-absorbing cap 13 can be used to reduce vibration, thereby reducing the mutual influence between the seat and the gear box.

[0032] It should be known that when installing the seat, the seat is mainly supported by the top of the box 1, so the contact force between the top of the box 1 and the seat is the largest. Therefore, in order to ensure the stability of the seat during travel, a shock-absorbing component can be set between the seat and the box 1 for shock absorption. In order to ensure the stable installation of the shock-absorbing component, the shock-absorbing component can adopt a shock-absorbing cap 13, and the shock-absorbing cap 13 can be tightly sleeved on the top of the box 1. The shock-absorbing cap 13 is made of flexible material for shock absorption. The specific material selection of the shock-absorbing cap 13 is common knowledge of those skilled in the art. Common flexible materials include rubber and the like.

[0033] In this embodiment, in order to ensure the stable installation of the shock absorbing cap 13, the shock absorbing cap 13 can be clamped after being sleeved on the top of the box body 1, thereby ensuring that the shock absorbing cap 13 is limited in the direction of leaving the box body 1. There are many clamping structures between the shock absorbing cap 13 and the box body 1. For easy understanding, two specific examples will be used for detailed description below.

[0034] Example 1: Figure 2 , Figure 3 and Figure 4 As shown, the top protrusion of the box body 1 is provided with a rectangular cross-section engaging portion 111, and at least one pair of opposite side protrusions of the engaging portion 111 are provided with a block 112; accordingly, the shock absorbing cap 13 is a rectangular structure as a whole, and at least one pair of opposite side edges of the shock absorbing cap 13 is provided with a slot 130. When the shock absorbing cap 13 is sleeved on the engaging portion 111, the shock absorbing cap 13 can be engaged with the corresponding block 112 through the slot 130.

[0035] It is understandable that, for Example 1, the slot 130 can also be set on the side of the locking portion 111, and then a locking block 112 can be set on the side of the shock-absorbing cap 13 to protrude inward, so that when the shock-absorbing cap 13 is sleeved on the locking portion 111, the shock-absorbing cap 13 can be engaged with the slot 130 on the locking portion 111 through the locking block 112.

[0036] Example 2: The clamping part 111 is cylindrical in shape, and an annular protrusion or annular groove is provided in the middle of the clamping part 111 along the circumferential direction, so that when the shock absorbing cap 13 is sleeved on the clamping part 111, the annular protrusion or annular groove can form a clamping fit with the shock absorbing cap 13.

[0037] It should be noted that both of the above examples can meet the needs of this embodiment, but in order to facilitate the injection molding of the box body 1, the clamping portion 111 is generally a rectangular structure, so this embodiment preferably adopts the above example 1 for the clamping of the clamping portion 111 and the shock absorbing cap 13. The clamping portion 111 and the shock absorbing cap 13 are clamped by at least one pair of opposite sides to ensure the limiting stability of the shock absorbing cap 13 in the direction of leaving the clamping portion 111.

[0038] In this embodiment, the tops of the first half box 11 and the second half box 12 are both provided with a snap-fitting portion 111, and the snap-fitting block 112 can be formed on the snap-fitting portion 111 on the top of the first half box 11 or the second half box 12 alone, or the snap-fitting block 112 can be formed on the snap-fitting portion 111 on the top of the first half box 11 and the second half box 12 at the same time. Figure 1 and Figure 3 As shown, the thickness of the first half box 11 is greater than that of the second half box 12 , so that the block 112 is formed separately on the engaging portion 111 at the top of the first half box 11 , thereby reducing the difficulty of forming the box 1 .

[0039] It should be known that the shock-absorbing cap 13 is made of a flexible material, so the shock-absorbing cap 13 has a large deformation capacity; when the shock-absorbing cap 13 and the engaging portion 111 are sleeved, the shock-absorbing cap 13 can be pressed toward the engaging portion 111, and then the engagement of the clamping block 112 and the engaging slot 130 is completed through the elastic deformation of the shock-absorbing cap 13 itself. However, even if the shock-absorbing cap 13 is made of a flexible material, the required pressing force is also relatively large; in order to facilitate the sleeve installation of the shock-absorbing cap 13, the extrusion surface 1120 of the clamping block 112 near the top of the engaging portion 111 can be provided with an inclined surface or an arc surface, and then when the shock-absorbing cap 13 is installed, when the shock-absorbing cap 13 contacts the extrusion surface 1120 through the lower end surface, the shock-absorbing cap 13 can be easily opened through the inclined surface or arc surface structure. Of course, the lower end surface of the shock absorbing cap 13 may also be set as an inclined surface or an arcuate surface; or the extrusion surface 1120 and the lower end surface of the shock absorbing cap 13 may both be set as inclined surfaces or arcuate surfaces.

[0040] In this embodiment, Figure 1 As shown, the axial length corresponding to the output bevel gear 21 is the longest, and the length dimension of the lower part of the housing 1 corresponding to the output bevel gear 21 is the largest. Therefore, when installing the seat, shock-absorbing pads 14 can be installed at both ends of the lower part of the housing 1 to contact the seat, so as to further reduce the mutual influence between the seat and the gear box during the movement. The shock-absorbing pad 14 is made of flexible material to achieve shock absorption. The specific material selection of the shock-absorbing pad 14 is common knowledge of those skilled in the art. Common flexible materials include rubber and the like.

[0041] Another aspect of the present application provides a seat drive, such as Figure 1 As shown, one preferred embodiment includes a rotating device (not shown), the above-mentioned gear box and a long screw 02. The gear box is threadedly matched with the long screw 02 through the output bevel gear 21 corresponding to the output end, and the rotating device is installed on the gear box and spline-connected with the input bevel gear 26 corresponding to the input end of the gear box through the drive shaft 01 at the output end, so that the gear box can move along the long screw 02 under the drive of the rotating device and drive the seat installed on the gear box to adjust its position.

[0042] It is understandable that the specific structure and working principle of the rotating device are well-known technologies to those skilled in the art, so they will not be elaborated in detail here; common rotating devices include motors and motors. The output end of the rotating device can be connected to the input end of the bevel gear box through the installed drive shaft 01. The specific structure and working principle of the long screw 02 are well-known to those skilled in the art, so they will not be elaborated in detail here; in order to ensure the safety and stability of the seat adjustment, the long screw 02 generally adopts a metal rod, and the long screw 02 made of metal can meet the long-stroke stiffness requirements of the seat adjustment.

[0043] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A gearbox, comprising a housing and a helical gear set, characterized in that: The extension directions of the input end and the output end of the helical gear set are parallel; the housing includes a first half housing and a second half housing, the first half housing and the second half housing are suitable for being fastened together by bolts, and the mating surfaces of the first half housing and the second half housing are perpendicular to the extension directions of the input end and the output end of the helical gear set.

2. The gearbox according to claim 1, characterized in that: A shock-absorbing cap is detachably mounted on the top of the box body, and the box body is suitable for flexibly contacting the seat through the shock-absorbing cap.

3. The gearbox according to claim 2, characterized in that: A clamping portion is provided on the top of the box body, and the shock-absorbing cap is sleeved on the clamping portion and matched with the clamping portion through a clamping structure, so that the movement of the shock-absorbing cap in a direction of leaving the clamping portion is restricted.

4. The gearbox according to claim 3, characterized in that: The clamping part and the shock-absorbing cap are both rectangular structures, at least one pair of opposite sides of the clamping part is provided with a clamping block, and at least one pair of opposite sides of the shock-absorbing cap is provided with a clamping groove; the shock-absorbing cap is sleeved on the clamping part and clamped with the clamping block through the clamping groove to form the clamping structure.

5. The gearbox according to claim 3, characterized in that: The clamping portion and the shock-absorbing cap are both rectangular structures, at least one pair of opposite sides of the clamping portion are provided with a clamping groove, and at least one pair of opposite sides of the shock-absorbing cap are provided with a clamping block extending inwardly; the shock-absorbing cap is sleeved on the clamping portion and is clamped with the clamping groove through the clamping block to form the clamping structure.

6. The gearbox according to claim 3, characterized in that: The clamping part is cylindrical, and a ring-shaped protrusion or a ring-shaped groove is arranged in the middle of the clamping part along the circumferential direction; the shock-absorbing cap is sleeved on the clamping part and forms the clamping structure by covering the ring-shaped protrusion or the ring-shaped groove.

7. The gearbox according to claim 4, characterized in that: The clamping block is provided with an extrusion surface on one side close to the top end of the clamping portion, and the extrusion surface and / or the lower end surface of the shock absorbing cap are configured as an inclined surface or an arcuate surface.

8. The gearbox according to claim 4, characterized in that: The thickness of the first half box is greater than that of the second half box, and the clamping block is formed on the clamping portion at the top of the first half box.

9. The gearbox according to any one of claims 1 to 8, characterized in that: The box body is in flexible contact with the seat through shock-absorbing pads at the two ends of the lower part.

10. A seat driver, characterized in that: A gearbox comprising any one of claims 1-9.

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