JP7104795B2 - Discontinuous angle adjuster - Google Patents

Description

The present invention relates to the technical field of angle adjusters, and particularly to discontinuous angle adjusters.

Conventionally, in China and abroad, a seat angle adjuster for a vehicle is attached to a vehicle seat, and the seat angle adjuster can adjust the angle of the seat backrest with respect to the seat cushion.

Conventional angle adjusters generally have the following drawbacks. 1), lock / unlock synchrony is low, sealing is low (cannot meet painting demand), 2), unlocking feels poor, and manufacturing costs are high.

The present invention mainly solves the technical problems existing in the prior art, thereby providing a discontinuous angle adjuster having high lock synchrony, good unlocking feel, and low manufacturing cost.

The above technical problem of the present invention is mainly solved by the following technical proposal.
The discontinuous angle adjuster according to the present invention includes a main plate, a cam, a lock plate, a cam spring, a toothed plate, and a control disk.
A mounting groove and a stopper are provided inside the main plate, the cam spring is symmetrically provided at the corner portion of the mounting groove, and the cam is mounted at the center position of the mounting groove. A plurality of bumps are provided on the side close to the mounting groove, the extending end of the cam spring has a one- to -one correspondence with the bump, and the cam spring is located between the main plate and the lock plate. ,
The stoppers are equidistant around the mounting groove, the lock plate is provided between two adjacent stoppers, and a dog tooth is further provided on the top of the lock plate.
The main plate is further connected to the toothed plate, a toothed ring is provided on the inner circumference of the toothed plate, and the toothed ring is fitted to the dog tooth.
The control disc is located inside the toothed plate and is further connected to the cam.
When it is necessary to lock, the cam spring presses the bump to rotationally drive the cam, and the cam engages the dog tooth with the toothed ring by pushing out the lock plate by a push mechanism. Put it in the lock position,
When it is necessary to unlock, the cam is rotated in the unlocking direction by an external force to drive the control disk to rotate, and the control disk pulls back the lock plate by a pull-back mechanism to release it from the meshing position. ..

Further, the push mechanism includes a first rear support pin, a second rear support pin, a first front support pin, and a second front support pin, and the first rear support pin and the first front support pin are the lock plates, respectively. When the second rear support pin and the second front support pin are provided on both sides of the bottom end of the cam and are provided at intervals on the outer peripheral side of the cam, and the first rear support pin and the second rear support pin come into contact with each other. , The first front support pin and the second front support pin are separated, and the dog tooth and the toothed ring mesh with each other.

Further, a protruding pin is further provided at the extending end of the cam spring, and the shape of the bump is oval. Including the side, when in the locked state, the protruding pin comes into contact with the first side, or between the first side and the highest side, and when in the unlocked state, the protruding pin is on the highest side. Contact.

Further, the pull-back mechanism includes an arc-shaped chute and a slider, the arc-shaped chute is provided on the side of the control disk close to the cam, and the slider is provided on the side of the lock plate close to the cam. When the slider is slidably contacted with the arc-shaped chute and needs to be unlocked, the cam is rotated in the unlocking direction by an external force to rotate and drive the control disk, and the arc-shaped chute is driven by the slider. Is slidably driven to pull back the lock plate and release it from the meshing position.

Further, a plurality of fixing grooves are further provided on the side surface of the cam opposite to the bump, and the control disk is correspondingly provided with a plurality of fixing blocks fitted in the fixing grooves.

Further, the cross-sectional shape of the fixed block is a shape like a "几" or a "Z" shape with one side open.

Further, a tubular protrusion that projects outward is further provided at the internal center position of the main plate, the tubular protrusion is located in the mounting groove, and the outer circumference of the tubular protrusion and the minimum of the bump. A gap that changes stepwise is provided between the side and the side.

Further, the bump and the cam spring are provided flush with each other.

Further, outside the toothed plate and the main plate, a band streak for restricting the axial separation of the toothed plate and the main plate is further provided.

The beneficial effects of the present invention are as follows. 1) Improves the synchronism of multiple lock plates entering the meshing position and improves the operability, 2) The axial gap between the cam and the main plate is small, and the sealing performance of important parts in the painting process 3), improve the comfort and feel of unlocking, guarantee the lock torque, effectively reduce the maximum unlock torque, 4), simple parts composition, gold Mold complexity requirements and low manufacturing costs.

In order to more clearly explain the examples of the present invention or the technical proposals of the prior art, the drawings described below will be briefly described below with reference to the drawings necessary for the description of the examples or the prior art. Is merely a partial embodiment of the present invention, and one of ordinary skill in the art can conceive other drawings based on these drawings without any creative effort.

It is an exploded view of the discontinuous angle adjuster of this invention. It is a structural schematic diagram of the push mechanism of the discontinuous angle adjuster of this invention. It is a structural schematic diagram of the torque adjustment mechanism of the discontinuous angle adjuster of this invention. It is a schematic diagram of the locked state of the discontinuous angle adjuster of this invention. It is a schematic diagram of the state just before unlocking of the discontinuous angle adjuster of this invention. It is a schematic diagram of the unlocked state of the discontinuous angle adjuster of this invention. It is a schematic diagram of the force action of the discontinuous angle adjuster of this invention.

Preferred embodiments of the present invention will be described in detail below with reference to the drawings so that those skilled in the art can easily understand the effects and features of the present invention and clearly and clearly limit the scope of claims of the present invention. do.

As shown in FIGS. 1 to 6, the discontinuous angle adjuster of the present invention includes a main plate 1, a cam 2, a lock plate 3, a cam spring 4, a toothed plate 5, and a control disk 6. With
Inside the main plate 1, a mounting groove 11 and a stopper 12 are provided, a cam spring 4 is provided symmetrically at the corner portion of the mounting groove 11, the cam 2 is mounted at the center position of the mounting groove 11, and the cam 2 A plurality of bumps 21 are provided on the side close to the mounting groove 11, the extending end of the cam spring 4 has a one- to -one correspondence with the bump 21, and the cam spring 4 is between the main plate 1 and the lock plate 3. Located in

The stopper 12 is evenly spaced around the mounting groove 11, the lock plate 3 is provided between two adjacent stoppers 12, and a dog tooth 31 is further provided on the top of the lock plate 3, and the main plate 1 is further provided. It is connected to the toothed plate 5, a toothed ring 51 is provided on the inner circumference of the toothed plate 5, the toothed ring 51 is fitted to the dog tooth 31, and the control disk 6 is a toothed plate 5. When it is internally located, connected to the cam 2 and needs to be locked, the cam spring 4 presses the bump 21 to drive the cam 2 to rotate, and the cam 2 pushes out the lock plate 3 by the push mechanism 7. As a result, when it is necessary to engage the dog tooth 31 with the toothed ring 51, put it in the locked position, and unlock it, the cam 2 is rotated in the unlocking direction by an external force to rotate and drive the control disk 6. , The control disk 6 pulls back the lock plate 3 by the pull-back mechanism 8 and disengages it from the meshing position.

In the present invention, the lock plate 3 generally requires 2 to 6, and when the size or weight of the angle adjuster is large, the force acting position of the meshing tooth (the toothed ring 51 meshes with the dog tooth 31). Is far from the center of rotation (center of rotation of torque), the number of meshing teeth required for a large size is small under the same load (strength index) conditions, and in the process of improving the compactness and weight reduction of the angle adjuster, the force acting position Is closer to the center of the circle, the thickness of the material of the lock plate 3 is reduced, and therefore more meshing teeth are required to load the strength, but due to the limited movement structure, each movable lock plate The number of dog teeth 31 that can be placed in 3 is also limited (generally about 20 to 30), so the comfort index (including unlocking comfort) is guaranteed while the safety index is guaranteed. After optimization and strength and weight indicators have been determined, at least four lock plates are required to ensure safety indicators. Also, the more lock plates 3, the more complicated the system and the higher the probability of tooth extrusion during the locking process. Therefore, in this embodiment, the number of lock plates 3 is preferably four.

Specifically, the push mechanism 7 includes a first rear support pin 71, a second rear support pin 72, a first front support pin 73, and a second front support pin 74, and the first rear support pin 71. And the first front support pin 73 are provided on both sides of the bottom end of the lock plate 3, respectively, and the second rear support pin 72 and the second front support pin 74 are provided on the outer peripheral side of the cam 2 at intervals. When the support pin 71 and the second rear support pin 72 come into contact with each other, the first front support pin 73 and the second front support pin 74 are separated, and the dog tooth 31 and the toothed ring 51 mesh with each other.

In the present invention, after the cam 2 is locked, the second rear support pin 72 on the cam 2 causes rigid contact with as many lock plates 3 as possible (ie, the second rear support pin 72 is the first rear support pin). Must be in contact with 71), ensuring the ability (strength) of the angle adjuster to resist external torque. In practice, there is a concentricity deviation between the main plate 1 and the toothed plate 5 because the external load is not symmetrical or the part size is not perfect, and the toothed plate 5 and the lock Similarly, the entanglement circle formed by the plate 3 has a concentricity deviation so as to achieve the purpose of generating rigid contact with as many lock plates as possible when the cam 2 rotates in the locking direction. It is necessary to adapt to the above concentricity deviation, and therefore it is necessary to appropriately increase the floating amount between the cam 2 and the main plate 1, and in this embodiment, the lock plate 3 is the first rear support pin. The lock plate 3 is pushed so as to be displaced in one direction along the contact force between the 71 and the second rear support pin 72, and finally the lock plate 3 is brought into contact with both of the two adjacent stoppers 12 to improve the rigidity of the lock joint. For the purpose of this, when in the locked state, the first rear support pin 71 and the first rear support pin 72 come into contact with each other, and the first front support pin 73 and the second front support pin 74 are separated from each other.

The present invention ensures that any of the three lock plate parts is placed in a chute formed between the two stoppers 12 in mass production, and the chute width is reduced due to subsequent assembly steps such as welding. If there is a risk, the actual width of the lock plate 3 is slightly smaller than the distance between the two adjacent stoppers 12 for the purpose of ensuring the attachment of the lock plate 3.

In the present invention, a protruding pin 41 is further provided at the extending end of the cam spring 4, the shape of the bump 21 is oval, and the oval bump 21 has a long straight step and a large width to obtain torque. The oval includes the first side 211, the highest side 212, the second side 213, and the lowest side 214, and when in the locked state, the protruding pin 41 is the first. Side 2
When the product is in contact with 11 or between the first side 211 and the highest side 212 and is in the unlocked state, the protruding pin 41 comes into contact with the highest side 212. In the present invention, the bump 21 and the cam spring 4 are provided flush with each other. As shown in FIG. 7, the present invention realizes that the maximum unlock torque is effectively reduced and the comfort is improved while the lock torque does not change, that is, the torque-unlock angle curve. The force that the cam spring 4 acts on the bump 21 corresponds to two moment lengths, one of which is the moment length from the center of the cam spring 4 itself, in order to achieve the purpose that L1 and the other is the moment length L2 from the center of rotation of the bump 21 and the torque in the cam: T2 = T1 (cam spring) / L1 * L2, before unlocked in the structural design. It is necessary to slightly increase or slightly attenuate the ratio of L2 / L1 and make the damping speed larger than the torque increase rate K of the cam spring 4 after unlocking.

Specifically, the pull-back mechanism 8 of the present invention includes an arc-shaped chute 61 and a slider 32, and the arc-shaped chute 61 is provided on the side of the control disk 6 near the cam 2, and the slider 32 is attached to the lock plate 3. When the slider 32 is slidably contacted with the arcuate chute 61 and needs to be unlocked by being provided on the side close to the cam 2, the cam 2 is rotated in the unlocking direction by an external force to drive the control disk 6 to rotate. The arc-shaped chute 61 slides and drives the slider 32 to pull back the lock plate 3 and disengage it from the meshing position.

In the present invention, a plurality of fixing grooves 22 are further provided on the side surface of the cam 2 opposite to the bump 21, and the control disk 6 is supported by a plurality of fixing blocks 62 fitted in the fixing grooves 22. Is provided. In order to increase the ability of the control disc 6 to transmit torque, the cross-sectional shape of the fixed block 62 is a "几" -like shape or a "Z" shape with one side open.

Specifically, a tubular protrusion 13 projecting outward is further provided at the internal center position of the main plate 1, the tubular protrusion 13 is located in the mounting groove 11, and is the outer circumference of the tubular protrusion 13. A gap is provided between the bump 21 and the lowest side 214, and the size of the gap changes stepwise. Preferably, the center hole of the control disk 6 and the center hole of the cam 2 have similar shapes and are configured to further increase the ability to load torque from the spline shaft. In the present invention, after the cam 2 is locked, the lock plate 3 completely meshes with the teeth of the toothed plate 5, and the gap between the outer circumference of the tubular protrusion 13 and the lowest side 214 of the bump 21 is large and large. Allows floating amount. Immediately before unlocking the cam 2, the teeth of the lock plate 3 and the toothed plate 5 are just disengaged from the meshing region, and the gap between the outer circumference of the tubular protrusion 13 and the lowest side 214 of the bump 21. Is small and allows a small amount of floating, and thus the consistency of the inserted appearances of the four lock plates 3 can be improved.

In the present invention, in order to further improve the stability of the structure, the toothed plate 5 and the main plate 1 are externally provided with a stirrups for restricting the axial separation of the toothed plate 5 and the main plate 1. 9 is further provided.

Therefore, the effects of the present invention are as follows. 1) Improve the synchronism that a plurality of lock plates 3 enter the meshing position and improve the operability, 2), the axial gap between the cam 2 and the main plate 1 is small, and the cam 2 and the main plate 1 The axial clearance between and the can be reduced from 2 mm to 0.2 mm, and when combined with oils and fats, effectively prevents the solution from getting inside and affecting the angle adjuster performance during the painting process. It is possible,

3) As the unlocking angle changes, the moment decreases rapidly, the torque rises slowly, and begins to fall near the angle immediately before unlocking, improving the comfort and feel of unlocking and locking torque. The maximum unlocking torque is effectively reduced, 4) the components are simple to configure, the mold complexity requirements and manufacturing costs are low.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited to this, and any changes or replacements that can be conceived without the need for inventive step labor are all the scope of protection of the present invention. Included in. Therefore, the scope of protection of the present invention is based on the scope of protection limited to the claims.

Claims (6)

A main plate, a cam, a lock plate, a cam spring, a toothed plate, and a control disk are provided. A mounting groove and a stopper are provided inside the main plate, and the cam spring is a mounting groove of the mounting groove. The cam is symmetrically provided in the corner portion, the cam is mounted at the center position of the mounting groove, a plurality of bumps are provided on the side of the cam near the mounting groove, and the extension end of the cam spring is the bump. The cam springs are located between the main plate and the lock plate , the stoppers are evenly spaced around the mounting groove, and the lock plates are adjacent to each other. A dog tooth is further provided between the stoppers and on the top of the lock plate, the main plate is further connected to the toothed plate, and a toothed ring is formed on the inner circumference of the toothed plate. The cam spring is It is necessary to press the bump to rotate and drive the cam, and the cam pushes out the lock plate by a push mechanism to engage the dog tooth with the toothed ring, put it in the lock position, and unlock it. At one time, the cam is rotated in the unlocking direction by an external force to drive the control disk to rotate, and the control disk pulls back the lock plate by a pull-back mechanism to release the lock plate from the meshing position, and the push mechanism is released. The first rear support pin, the second rear support pin, the first front support pin, and the second front support pin are included, and the first rear support pin and the first front support pin are provided on both sides of the bottom end of the lock plate, respectively. When the second rear support pin and the second front support pin are provided on the outer peripheral side of the cam at intervals and the first rear support pin and the second rear support pin come into contact with each other, the first front support is provided. The pin and the second front support pin are separated, the dog tooth and the toothed ring mesh with each other, a protruding pin is further provided at the extending end of the cam spring, the shape of the bump is oval, and the length is long. The circle includes the first side, the highest side, the second side, and the lowest side, and when in the locked state, the protruding pin extends from the first side or the first side to the highest side. When in contact with the space and in the unlocked state, the protruding pin A discontinuous angle adjuster characterized in that the abutment is on the highest side. The pull-back mechanism includes an arc-shaped chute and a slider, the arc-shaped chute is provided on the side of the control disk close to the cam, the slider is provided on the side of the lock plate close to the cam, and the slider is provided. Is slid to the arc-shaped chute and needs to be unlocked, the cam is rotated in the unlocking direction by an external force to rotate and drive the control disk, and the arc-shaped chute slides the slider. The discontinuous angle adjuster according to claim 1, wherein the lock plate is driven to move back and is released from the meshing position. A plurality of fixing grooves are further provided on the side surface of the cam opposite to the bump, and the control disk is correspondingly provided with a plurality of fixing blocks fitted in the fixing grooves. 2. The discontinuous angle adjuster according to claim 2. A tubular protrusion that projects outward is further provided at the internal center position of the main plate, the tubular protrusion is located in the mounting groove, and the outer circumference of the tubular protrusion and the lowest side of the bump. The discontinuous angle adjuster according to claim 3, wherein a gap that changes stepwise is provided between the two. The discontinuous angle adjuster according to any one of claims 1 to 4, wherein the bump and the cam spring are provided flush with each other. The first aspect of the present invention, wherein a band streak for restricting the axial separation of the toothed plate and the main plate is further provided outside the toothed plate and the main plate. Discontinuous angle adjuster.

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