Transmission mechanism for disconnectable stabilizer bar

Abstract

A transmission mechanism for a disconnectable stabilizer bar comprises a first bar body sleeve, a second bar body sleeve, a movable sleeve and a movable sleeve driving mechanism. The first rod body sleeve and the second rod body sleeve are used for being connected with a first rod body and a second rod body of the breakable stabilizer rod respectively. The movable sleeve is in key connection with the first rod body sleeve, and the movable sleeve driving mechanism is used for driving the movable sleeve to move so that the movable sleeve can be selectively connected with or separated from the second rod body sleeve in a tooth embedding mode. The movable sleeve and the first rod body sleeve are in key connection, the movable sleeve and the second rod body sleeve are in jaw connection, and compared with the prior art, friction force generated by the jaw connection mode is small when the movable sleeve and the second rod body sleeve are switched between an engaged state and a separated state, and the movable sleeve and the second rod body sleeve are in key connection. The abrasion loss and the working noise are small, the torque transmission is more stable, the service life of the product is prolonged, and the driving comfort of a driver is improved.

Description

Technical Field

[0001] This utility model relates to vehicle stabilizer bar technology, and more particularly to a detachable stabilizer bar. Background Technology

[0002] Stabilizer bars improve vehicle roll stability when cornering or driving on uneven surfaces, ensuring a smooth ride. Traditional stabilizer bars, limited by their fixed structure, have difficulty adjusting stiffness to adapt to different road conditions. To address this issue, some manufacturers have introduced disconnectable stabilizer bars. A disconnectable stabilizer bar consists of a first bar and a second bar, which transmit torque via a transmission mechanism.

[0003] The existing transmission mechanism includes a first rod sleeve, a second rod sleeve, a movable sleeve, and a movable sleeve drive mechanism. The first and second rod sleeves connect the first and second rods of the stabilizing rod, respectively. The movable sleeve is splined to the first rod sleeve, and the movable sleeve drive mechanism drives the movable sleeve to move, allowing it to selectively engage or disengage from the second rod sleeve via spline connection. When the movable sleeve is simultaneously connected to both the first and second rod sleeves, torque can be transmitted between the first and second rods; when the movable sleeve disengages from the second rod sleeve, a formal disconnection is achieved between the first and second rods.

[0004] The friction generated when the inner spline (keyway) of the movable sleeve and the outer spline of the second rod sleeve switch between the engaged and disengaged states is relatively large, resulting in greater wear and operating noise. This causes unstable torque transmission and also affects the product's service life and the driver's driving comfort. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a transmission mechanism for a disconnectable stabilizer bar, which has stable torque transmission performance, low operating noise, and long service life.

[0006] According to an embodiment of the present invention, a transmission mechanism for a detachable stabilizer bar includes a first rod body and a second rod body. The transmission mechanism includes a first rod body sleeve, a second rod body sleeve, a movable sleeve, and a movable sleeve drive mechanism. The first rod body sleeve and the second rod body sleeve are used to connect the first rod body and the second rod body, respectively. The movable sleeve is keyed to the first rod body sleeve, and the movable sleeve drive mechanism is used to drive the movable sleeve to move so that the movable sleeve can selectively connect or separate from the second rod body sleeve. The characteristic is that the connection between the movable sleeve and the second rod body sleeve is a toothed connection.

[0007] The aforementioned transmission mechanism for a detachable stabilizer bar includes a housing, a first rod sleeve, a second rod sleeve, a movable sleeve, and a movable sleeve drive mechanism, all of which are disposed within the housing.

[0008] The aforementioned transmission mechanism for a disconnectable stabilizer bar includes a movable sleeve drive mechanism comprising a fork and a fork drive mechanism for driving the fork to move; the movable sleeve has a fork groove on its side that mates with the fork, and the fork extends into the fork groove to drive the movable sleeve to move.

[0009] The aforementioned transmission mechanism for a disconnectable stabilizer bar includes a shift fork drive mechanism comprising a motor, a screw, a nut, a guide shaft, a first spring, and a second spring. The output end of the motor is connected to one end of the screw to drive the screw to rotate. The nut is screwed to the screw, and the first spring is sleeved on the other end of the screw, with one end of the first spring abutting against the nut and the other end of the first spring abutting against one end of the shift fork. One end of the guide shaft is fixed to the housing, and the shift fork is axially movable and positioned on the other end of the guide shaft. The second spring is sleeved outside the guide shaft, with both ends of the second spring abutting against the housing and the other end of the shift fork, respectively.

[0010] Compared with the prior art, this utility model has the following advantages:

[0011] 1. In this embodiment, the connection between the movable sleeve and the first rod sleeve is a key connection, and the connection between the movable sleeve and the second rod sleeve is a toothed connection. Compared with the prior art, the toothed connection generates less friction when the movable sleeve and the second rod sleeve switch between the engagement and disengagement states, resulting in less wear and less working noise. The torque transmission is more stable, which improves the service life of the product and the driving comfort of the driver.

[0012] 2. In this embodiment, springs are provided on both sides of the shift fork, which allows the shift fork to achieve flexible and reliable reset, resulting in less damage to parts and lower operating noise. Attached Figure Description

[0013] Figure 1 A cross-sectional schematic diagram of a transmission mechanism for a detachable stabilizer bar according to an embodiment of the present invention is shown.

[0014] Figure 2 An exploded view of the main components of a transmission mechanism for a disconnectable stabilizer bar according to an embodiment of the present invention is shown. Detailed Implementation

[0015] Please see Figure 1 and Figure 2 A transmission mechanism for a detachable stabilizer bar according to an embodiment of the present invention includes a first rod sleeve 1, a second rod sleeve 2, a movable sleeve 3, a movable sleeve drive mechanism, and a housing 5.

[0016] The first rod sleeve 1, the second rod sleeve 2, the movable sleeve 3, and the movable sleeve drive mechanism are respectively disposed in the housing 5. The housing 5 includes a first housing 5a and a second housing 5b that are mated together and connected by bolts.

[0017] The first rod sleeve 1 and the second rod sleeve 2 are used to connect the first rod and the second rod (the first and second rods are not shown in the figure). Both the first rod sleeve 1 and the second rod sleeve 2 have a first end near the movable sleeve 3 and a second end away from the movable sleeve 3. The first end of the first rod sleeve 1 is provided with a protruding shaft 11, and the end face of the first end of the second rod sleeve 2 is provided with a slot 21 that mates with the protruding shaft 11. The protruding shaft 11 passes through the movable sleeve 3 and extends into the slot 21, with a clearance fit between the side of the protruding shaft 11 and the inner wall of the slot 21. The end face of the second end of the first rod sleeve 1 has a first receiving cavity 12 for accommodating the first rod, and the end face of the second end of the second rod sleeve 2 has a second receiving cavity 22 for accommodating the second rod. The inner wall of the first receiving cavity 12 is provided with a first internal spline 121 for key connection with the first rod; the inner wall of the second receiving cavity 22 is provided with a second internal spline 221 for key connection with the second rod. The housing 5 is provided with a first through hole 51 and a second through hole 52 at positions corresponding to the second end of the first rod sleeve 1 and the second end of the second rod sleeve 2, respectively. The second end of the first rod sleeve 1 and the second end of the second rod sleeve 2 extend out of the first through hole 51 and the second through hole 52, respectively.

[0018] In this embodiment, a copper sleeve 6 is fitted over both the first rod sleeve 1 and the second rod sleeve 2. A skeleton seal 71 is provided between each copper sleeve 6 and the housing 5, and a sealing ring 72 is provided between each rod sleeve and the housing 5.

[0019] In other embodiments, the convex shaft may be disposed at the first end of the second rod sleeve 2, and the slot that mates with the convex shaft may be disposed at the first end of the first rod sleeve 1.

[0020] The movable sleeve 3 is connected to the first rod sleeve 1 via a spline. The first rod sleeve 1 is provided with an external spline 13, and the movable sleeve 3 is sleeved on the outside of the first rod sleeve 1. The movable sleeve 3 is provided with an internal spline that meshes with the external spline 13.

[0021] The movable sleeve driving mechanism is used to drive the movable sleeve 3 to move, so that the movable sleeve 3 can selectively engage or disengage with the second rod sleeve 2 in a toothed manner. In this embodiment, the first end face of the second rod sleeve 2 is provided with a plurality of first protruding teeth 25 evenly distributed in the circumferential direction, and the end face of the movable sleeve 3 opposite to the first end of the second rod sleeve is provided with a plurality of first tooth grooves 35 that are respectively engaged with the plurality of first protruding teeth 25.

[0022] The movable sleeve drive mechanism includes a shift fork 41 and a shift fork drive mechanism for driving the shift fork 41 to move. The side of the movable sleeve 3 is provided with a shift fork groove 31 that cooperates with the shift fork 41. The shift fork 41 extends into the shift fork groove 31 to drive the movable sleeve 3 to move.

[0023] In this embodiment, the shift fork drive mechanism includes a motor 42, a screw 43, a nut 44, a guide shaft 45, a sensing pin 46, a first spring 47, and a second spring 48.

[0024] The output end of motor 42 is connected to one end of screw 43 to drive screw 43 to rotate. Nut 44 is screwed to screw 43. Nut 44 has a pin groove 446 on its side, and one end of sensing pin 46 is embedded in the pin groove 446. A first spring 47 is sleeved on the other end of screw 43, with one end of the first spring 47 abutting against nut 44 and the other end abutting against one end of shift fork 41. One end of guide shaft 45 is fixed to housing 5, and shift fork 41 is axially movable on the other end of guide shaft 45. Specifically, the end face of the other end of shift fork 41 has an axially extending guide hole 415, and guide shaft 45 is movably inserted into guide hole 415. A second spring 48 is sleeved on the outside of guide shaft 45, with both ends of the second spring 48 abutting against housing 1 and the other end of shift fork 41, respectively. The springs on both sides of shift fork allow for flexible and reliable reset, minimizing damage to parts and reducing operating noise.

[0025] The function of the sensing pin 46 is to cooperate with an external position sensor to detect the connection status between the movable sleeve 3 and the second rod sleeve 2. The position sensor sends the detection signal to the controller to further control the operation of the motor 42.

[0026] When the vehicle is driving on a smooth road, the motor 42 is in standby mode, the shift fork 41 is in the initial position, and the first rod sleeve 1 and the second rod sleeve 2 are fixedly engaged through the movable sleeve 3 to realize the function of a conventional stabilizer bar on a smooth road.

[0027] When the vehicle is driven on bumpy roads, the motor 42 is in forward rotation. The motor 42 drives the screw 43 to rotate, causing the nut 44 to move towards the guide shaft 45. The nut 14 pushes the first spring 47 and the shift fork 41 to move, causing the shift fork 41 to drive the movable sleeve 3 to move away from the second rod sleeve 2. The first rod sleeve 1 and the second rod sleeve 2 remain stationary, and the movable sleeve 3 separates from the second rod sleeve 2, thereby reducing bumps and improving the comfort of driving the vehicle on bumpy roads.

[0028] When the vehicle resumes driving on a stable road, the motor 42 is in reverse, driving the nut 44 to move away from the guide shaft 45. At this time, the second spring 48 is reset, causing the movable sleeve 3 to return to the position of engaging with the second rod sleeve 2, and the stabilizer bar returns to the stable operating state.

Claims

1. A transmission mechanism for a breakable stabilizer bar, the breakable stabilizer bar comprising a first bar body and a second bar body, the transmission mechanism comprising a first bar body sleeve, a second bar body sleeve, a movable sleeve and a movable sleeve drive mechanism; the first bar body sleeve and the second bar body sleeve for connecting the first bar body and the second bar body respectively; the movable sleeve being key connected with the first bar body sleeve, the movable sleeve drive mechanism for driving the movable sleeve to move so as to selectively connect or disconnect the movable sleeve with the second bar body sleeve; characterized in that, The connection between the movable sleeve and the second rod sleeve is a tenon-and-mortise connection.

2. Transmission for a disconnectable stabilizer bar according to claim 1, characterized in that The first rod sleeve and the second rod sleeve each have a first end close to the movable sleeve and a second end away from the movable sleeve. The first end of one of the first rod sleeve and the second rod sleeve is provided with a convex shaft, and the first end of the other of the first rod sleeve and the second rod sleeve is provided with a slot matched with the convex shaft, the convex shaft passes through the movable sleeve and extends into the slot, and a gap is formed between the side surface of the convex shaft and the inner wall of the slot. The end surface of the second end of the first rod sleeve is provided with a first accommodating cavity for accommodating the first rod, and the end surface of the second end of the second rod sleeve is provided with a second accommodating cavity for accommodating the second rod.

3. Transmission for a disconnectable stabilizer bar according to claim 2, characterized in that The inner wall of the first accommodating cavity is provided with a first internal spline for key connection with the first rod. The inner wall of the second accommodating cavity is provided with a second internal spline for key connection with the second rod.

4. Transmission for a disconnectable stabilizer bar according to claim 1 or 2, characterized in that The first rod sleeve is provided with an external spline. The movable sleeve is sleeved outside the first rod sleeve and is provided with an internal spline engaged with the external spline.

5. The transmission mechanism for a disconnectable stabilizer bar according to claim 2, characterized by The slot is formed in the end surface of the first end of the second rod sleeve, and the convex shaft is arranged in the first end of the first rod sleeve. The end surface of the first end of the second rod sleeve is provided with a plurality of first protrusions uniformly distributed in the circumferential direction, and the end surface of the movable sleeve opposite to the first end of the second rod sleeve is provided with a plurality of first tooth grooves respectively engaged with the plurality of first protrusions.

6. The transmission for a disconnectable stabilizer bar of claim 1, wherein, The movable sleeve driving mechanism includes a shift fork and a shift fork driving mechanism for driving the shift fork to move. The side surface of the movable sleeve is provided with a shift fork groove matched with the shift fork, and the shift fork extends into the shift fork groove to drive the movable sleeve to move.

7. Transmission for a disconnectable stabilizer bar according to claim 6, characterized in that The transmission mechanism for the disconnectable stabilizer bar includes a housing, and the first rod sleeve, the second rod sleeve, the movable sleeve and the movable sleeve driving mechanism are arranged in the housing.

8. Transmission for a disconnectable stabilizer bar according to claim 7, characterized in that The shift fork driving mechanism includes a motor, a screw rod, a nut, a guide shaft, a first spring and a second spring. The output end of the motor is connected with one end of the screw rod to drive the screw rod to rotate, the nut is screw-connected with the screw rod, the first spring is sleeved on the other end of the screw rod, one end of the first spring abuts against the nut, and the other end of the first spring abuts against one end of the shift fork. One end of the guide shaft is fixed to the housing, and the shift fork is arranged on the other end of the guide shaft in an axially movable manner; the second spring is sleeved outside the guide shaft, and two ends of the second spring abut against the housing and the other end of the shift fork respectively.

9. Transmission for a disconnectable stabilizer bar according to claim 8, characterized in that The end surface of the other end of the shift fork is provided with an axially extending guide hole, and the guide shaft is movably inserted into the guide hole.

10. Transmission for a disconnectable stabilizer bar according to claim 8, characterized in that The shift fork driving mechanism includes a sensing pin. The side surface of the nut is provided with a pin slot, and one end of the sensing pin is embedded in the pin slot.

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