Transmission device and reverse input locking assembly thereof
By designing a reverse input locking component, the frictional torque and tangential torque between the locking body and the housing are combined to solve the problem of steering wheel recoil under unexpected resistance, thereby improving the stability and safety of vehicle handling.
Patent Information
- Application Number
- CN202520167421.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-01-24
AI Technical Summary
When encountering significant unexpected resistance, existing automotive steering systems exhibit severe steering wheel backlash, causing driver delays and impacting driving safety.
Design a reverse input locking component that achieves a locking effect during reverse input by coordinating the frictional torque and tangential torque between the locking body and the locking housing, thereby reducing recoil torque.
It effectively suppresses the recoil torque during reverse input, improving driver control stability and driving safety.
Smart Images
Figure CN223672593U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of automobile steering, specifically relates to transmission and reverse input locking assembly thereof. BACKGROUND
[0002] The automobile steering system is a special mechanism for changing or maintaining the driving direction of the automobile, and is related to the steering stability and safety of the automobile. The automobile steering system can be divided into two categories: a mechanical steering system and a power steering system. In the mechanical steering system, a mechanical steering gear is used as a core component, and a steering wheel, a steering shaft, a universal joint and a connecting rod mechanism (a steering cross straight pull rod, etc.) are used as auxiliary components. The power steering system is divided into a hydraulic power steering system and an electric power steering system. The hydraulic power steering system is composed of a mechanical steering gear, a steering oil pump, a steering control valve and a steering power cylinder. The electric power steering system is composed of a mechanical steering gear, a direct current motor and a servo mechanism.
[0003] In order to reduce the reverse rebound and "hand hitting" phenomenon of the steering wheel caused by the accidental impact of the road on the wheel and the accidental force on the wheel during the driving of the automobile, a hydraulic damping component (a buffer oil cylinder) is added to the steering mechanism, which is a common technical means for various steering systems, so as to reduce the reverse rebound of the steering wheel when the wheel suffers from an accidental force and improve the driving safety performance. However, the damping effect of the buffer oil cylinder is limited. When the steering wheel suffers from a large accidental resistance, the automobile steering mechanism will produce a serious reverse rebound of the steering wheel, and even cause the driver to lose the steering wheel instantly. Since the driver has a 0.5 second lag time in the direction control reaction, the driver cannot stop the direction deviation caused by the accidental resistance of the steering wheel, which seriously affects the driving safety. UTILITY MODEL CONTENTS
[0004] In view of the above technical problems, the utility model provides a transmission and a reverse input locking assembly thereof. When the reverse input is performed, the input component abuts against the locking circular body to generate a tangential moment, the locking circular body abuts against the locking shell to generate a friction moment, the tangential moment is smaller than the friction moment, and the locking effect is generated.
[0005] The technical scheme adopted by the utility model is as follows: a reverse input locking assembly, comprising a locking shell and a locking circular body, the locking circular body is provided with a first mounting hole for cooperating with an output component and a second mounting hole for cooperating with an input component, the locking shell is arranged on the outer peripheral wall of the locking circular body, in a free state, there is a gap between the locking circular body and the locking shell, and when the reverse input is performed, the locking circular body and the locking shell abut against each other.
[0006] Optionally, the locking round body comprises an elastic ring and a plurality of locking blocks, the locking blocks each have a gap with an adjacent locking block, the locking blocks are provided with the first mounting holes, the plurality of locking blocks enclose the second mounting hole, and the elastic ring is arranged around the outer circumferential wall of the locking round body.
[0007] Optionally, the locking blocks are provided with grooves towards the side wall of the locking shell, the plurality of grooves enclose an annular groove matched with the elastic ring when the plurality of locking blocks enclose the locking round body.
[0008] Optionally, the hole wall of the second mounting hole has four straight edges for active abutting against the input component, the straight edges are arranged in parallel with the input component in a free state, and the straight edges are relatively twisted and abut against the input component when the input component is reversely input.
[0009] Optionally, the number of the locking blocks is four, the four locking blocks enclose the locking round body, and the locking round body has four gaps.
[0010] Optionally, the number of the locking blocks is two, the two locking blocks are arranged oppositely to form the locking round body, the locking round body has two gaps, the locking blocks are provided with notches, and the gaps are arranged at intervals with the notches.
[0011] Optionally, the locking round body is made of an elastic material.
[0012] The utility model discloses still disclose a transmission device, including input component, output component and the reverse input locking assembly described above, the output component and first mounting hole gap cooperation, the input component and second mounting hole gap cooperation, when the input component abuts locking round body and produces tangent moment when the reverse input, locking round body abuts locking shell and produces friction moment, and the tangent moment is less than the friction moment.
[0013] Optionally, the input component comprises edges and corners, the edges are sequentially connected and enclosed to form a rounded rectangular structure through the corners, the hole wall of the second mounting hole has four straight edges, the edges and the straight edges are arranged in parallel one by one in a free state, and the corners abut against the straight edges one by one when operating.
[0014] Optionally, the output component is provided with a plurality of protrusions at intervals in the circumferential direction, and the protrusions are matched with the first mounting holes one by one.
[0015] The utility model discloses the beneficial effect is: free state (here refers to static state or output component drive state), static state, the clearance between locking round body and locking shell, between output component and first mounting hole, between input component and second mounting hole all have;When output component drives, although the clearance between output component and first mounting hole, between input component and second mounting hole all have, when output component rotates, the second quadrant's card convex and hit the lower end of first mounting hole, produce the force to the down, make locking block move down and contact input component;Then the third quadrant's card convex and hit the upper end of first mounting hole produce the force to the up, make locking block move up and contact input component, like this realized the function of locking block " hold tightly input component " together with input component rotate. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 The structure schematic diagram of reverse input locking assembly for the utility model embodiment is provided;
[0017] Figure 2 The schematic diagram of reverse input locking assembly in free state for being composed of four locking blocks;
[0018] Figure 3 The schematic diagram of reverse input locking assembly in reverse input for being composed of four locking blocks;
[0019] Figure 4 The schematic diagram of reverse input locking assembly in static state for being composed of two locking blocks;
[0020] Figure 5 The schematic diagram of reverse input locking assembly in output component drive for being composed of two locking blocks;
[0021] Figure 6 The schematic diagram of reverse input locking assembly in reverse input for being composed of two locking blocks.
[0022] The mark in each drawing is: 1, locking shell;2, elastic ring;3, locking block;31, first mounting hole;32, second mounting hole;33, straight edge;34, notch;4, gap;5, input component;51, edge;52, corner;6, output component;61, convex block. DETAILED DESCRIPTION
[0023] The application will be further explained in detail in combination with the drawings and embodiments.
[0024] As Figures 1 to 6As shown, the embodiment discloses a reverse input locking assembly, which comprises a locking shell 1 and a locking round body, the locking round body is provided with a first mounting hole 31 for cooperating with an output component 6 and a second mounting hole 32 for cooperating with an input component 5, the locking shell 1 is arranged on the outer peripheral wall of the locking round body, in a free state, the locking round body and the locking shell 1 have a gap, and in reverse input, the locking round body and the locking shell 1 abut against each other.
[0025] The utility model discloses still a kind of transmission, including input component 5, output component 6 and reverse input locking assembly, the output component 6 and first mounting hole 31 gap cooperation, the input component 5 and second mounting hole 32 gap cooperation.The input component 5 includes edge 51 and angle 52, the edge 51 is sequentially connected and surrounded to form fillet rectangle structure by angle 52, in free state, the edge 51 and straight edge 33 are one-to-one corresponding parallel arrangement, when operating, the angle 52 and the straight edge 33 are one-to-one corresponding abut.The output component 6 is provided with a plurality of lugs 61 along the circumferential direction, and the lug 61 and the first mounting hole 31 are one-to-one corresponding cooperation.
[0026] Free state (here refers to static state or output component 6 driving state), static state, as Figure 2 And 4 As shown, the locking round body and the locking shell, the output component 6 and the first mounting hole 31, the input component 5 and the second mounting hole 32 all have a gap;When output component 6 drives, although the output component 6 and the first mounting hole 31, the input component 5 and the second mounting hole 32 all have a gap, when the output component 6 rotates, as Figure 5 As shown, the second quadrant card convex collides with the lower end of the first mounting hole 31, generates downward force, makes locking block move down and contact input component 5;Then the third quadrant card convex collides with the upper end of the first mounting hole 31 and generates upward force, makes locking block move up and contact input component 5, so that the locking block "hug tight input component 5" function is realized, rotates together with input component 5.Reverse input, that is, output component 6 does not start, but the wheel is rotated due to the uncontrollable force factor, and the torque generated will be fed back to the input component, if there is no locking assembly, the torque of reverse input will act on the output component 6 through the input component 5, and finally feedback to the steering wheel, which brings safety hazard, therefore, as Figure 3 And 6As shown, the input component 5 generates a tangential torque by abutting against the locking cylinder, and the locking cylinder generates a frictional torque by abutting against the locking housing. However, the tangential torque is less than the frictional torque, resulting in a locking effect. When the input component 5 is inputting in the reverse direction, the input component 5 expands the second mounting hole 32 until it touches the inner wall of the housing and locks. Because the first mounting hole 31 is large enough, the locking block 3 does not touch the latch of the output component 6 during this process, so the output component 6 will not rotate. The formulas for calculating the tangential torque T and the frictional torque T' are as follows:
[0027] T = F t ·r
[0028] T'=μF N ·R
[0029] F N =F t ·cosθ
[0030] The locking condition of the locking component is:
[0031] F t ·r<μF N ·R
[0032] Right now:
[0033] r < μRcosθ
[0034] Where: Ft is the tangential force, F N θ is the radial force, θ is the angle between the radial force and the tangential force, r is the radius of the input component, R is the inner diameter of the locking housing, and μ is the coefficient of friction between the locking block and the locking housing.
[0035] In this embodiment, as Figure 1 As shown, the locking circle includes an elastic ring 2 and multiple locking blocks 3. Each locking block 3 has a gap 4 between itself and adjacent locking blocks 3. Each locking block 3 has a first mounting hole 31, and the multiple locking blocks 3 together form a second mounting hole 32. The elastic ring 2 surrounds the outer peripheral wall of the locking circle. Each locking block 3 has a groove on its side wall facing the locking housing 1. When the multiple locking blocks 3 together form the locking circle, the multiple grooves together form an annular groove that mates with the elastic ring 2. During reverse input, the input component 5 drives the locking blocks to rotate, causing the locking blocks to tilt and move under centrifugal force. The input component 5 abuts against the inner wall of the locking block, generating a tangential torque, while the outer wall of the locking block abuts against the locking housing, generating a frictional torque. When the reverse input force disappears, the locking blocks reset under the constraint of the elastic ring 2. The annular groove limits the movement of the elastic ring 2.
[0036] In this embodiment, as Figures 2-6As shown, the hole wall of the second mounting hole 32 has four straight edges 33 for active abutment with the input component 5, in the free state, the straight edges 33 are arranged parallel to the input component 5, and in the reverse input, the straight edges 33 are relatively twisted and abut against the input component 5. The number of the locking blocks 3 is four, and the four locking blocks 3 enclose the locking circle, which has four gaps 4. The four gaps 4 are communicated with the second mounting hole 32. The number of the locking blocks 3 is two, and the two locking blocks 3 are oppositely arranged to form the locking circle, which has two gaps 4. The locking blocks 3 are provided with notches 34, and the gaps 4 are arranged in the gaps 34. The number of the locking blocks is four, in the free state, the corners 52 are arranged one by one corresponding to the gaps 4, and in the reverse input, the corners 52 are arranged one by one corresponding to the straight edges 33. The number of the locking blocks 422 is two, in the free state, the four corners 52 are divided into two groups arranged diagonally, one group of the corners 52 is arranged corresponding to the notches 34, and the other group of the corners 52 is arranged corresponding to the gaps 4. In the reverse input, the input component hits the locking block, pushes the locking block to abut against the inner wall of the locking shell, and generates the locking effect.
[0037] It can be understood that the above-described specific embodiments are only used to explain the related utility model, and are not limited to the utility model. In addition, it should be noted that, for the convenience of description, only the parts related to the utility model are shown in the drawings. The multiple technical solutions in the same embodiment, and the multiple technical solutions between different embodiments, can be arranged and combined to form new technical solutions without contradiction or conflict. Any equivalent structural transformation, direct or indirect application in other related technical fields, is also included in the protection scope of the utility model.
Claims
1. A reverse input lock assembly, comprising: The locking assembly comprises a locking shell and a locking circle, the locking circle is provided with a first mounting hole for cooperating with an output component and a second mounting hole for cooperating with an input component, the locking shell is arranged on the outer wall of the locking circle, and a gap is formed between the locking circle and the locking shell in a free state, and the locking circle and the locking shell abut against each other when the input component is reversely input.
2. The reverse input lock assembly of claim 1, wherein, The locking circle comprises an elastic ring and a plurality of locking blocks, the locking blocks are provided with gaps between adjacent locking blocks, the locking blocks are provided with the first mounting hole, and the plurality of locking blocks enclose the second mounting hole, and the elastic ring is arranged on the outer wall of the locking circle.
3. The reverse input lock assembly of claim 2, wherein, The locking blocks are provided with grooves on the side wall of the locking shell, the plurality of locking blocks enclose the locking circle, and the plurality of grooves enclose an annular groove for cooperating with the elastic ring.
4. The reverse input lock assembly of claim 2, wherein, The hole wall of the second mounting hole is provided with four straight edges for abutting against the input component, the straight edges are arranged in parallel with the input component in the free state, and the straight edges are twisted and abut against the input component when the input component is reversely input.
5. The reverse input lock assembly of claim 2, wherein, The number of the locking blocks is four, and the four locking blocks enclose the locking circle, and the locking circle has four gaps.
6. The reverse input lockout assembly of claim 2, wherein, The number of the locking blocks is two, the two locking blocks are arranged oppositely to form the locking circle, the locking circle has two gaps, the locking blocks are provided with notches, and the gaps and the notches are arranged at intervals.
7. The reverse input lockout assembly of claim 1, wherein, The locking circle is made of an elastic material.
8. A transmission characterized by, The locking assembly comprises an input component, an output component and the locking assembly according to any one of claims 1 to 7, the output component is gap-connected with the first mounting hole, the input component is gap-connected with the second mounting hole, the input component abuts against the locking circle to generate a tangential torque when the input component is reversely input, the locking circle abuts against the locking shell to generate a friction torque, and the tangential torque is smaller than the friction torque.
9. The transmission of claim 8, wherein, The input component comprises edges and corners, the edges are sequentially connected and enclosed to form a circular rectangular structure through the corners, the hole wall of the second mounting hole is provided with four straight edges, the edges and the straight edges are arranged in one-to-one correspondence in parallel in the free state, and the corners abut against the straight edges in one-to-one correspondence when the input component is reversely input.
10. The transmission of claim 8, wherein, The output component is provided with a plurality of protrusions at intervals in the circumferential direction, and the protrusions are connected with the first mounting hole in one-to-one correspondence.