High-strength stepless concentric angle regulator

Abstract

The invention discloses a high-strength stepless concentric angle regulator which comprises a pressing disc, an upper disc, a lower fixing plate, a rotating mechanism and a locking mechanism which are sequentially arranged from top to bottom. The locking mechanism comprises a toothed plate and a besides-star wheel, a fixed disc is arranged on the inner side of the toothed plate and the besides-star wheel, a plurality of notches are formed in the inner side of the besides-star wheel at intervals, a pair of special-shaped locking blocks is arranged in each notch, each special-shaped locking block is provided with a return spring, a plurality of shifting rods are arranged on the toothed plate, and the notches are gradually narrowed from the two ends to the middle. And when the special-shaped locking block enters the locking section from the unlocking sections, the outer circumferential surface of the special-shaped locking block is only locally attached to the inner circumferential surface of the notch in the middle through surface contact or line contact for locking, and a notch is formed between the inner circumferential surface of the special-shaped locking block and the fixed disc. When the special-shaped locking block is locked, the normal of the contact area of the notch and the locking face passes through the notch, and bidirectional locking of the whole regulator can be achieved when the motor does not act.

Description

Technical Field

[0001] This invention belongs to the technical field of rotation angle adjustment structure, specifically relating to a high-strength stepless concentric angle adjuster. Background Technology

[0002] In existing technologies, to change the rotation angle, a motor drives a driving gear, which in turn drives a driven gear, which in turn drives the target component to rotate, thus achieving angle adjustment. Ideally, when the motor stops rotating, the target component cannot rotate due to the meshing of the gears, thus achieving locking. However, in actual use, the target component may be subjected to external forces, causing the gears to be damaged and unable to lock; at the same time, severe impacts to the gears can also affect the meshing, preventing precise transmission when the motor is driving normally. Summary of the Invention

[0003] The present invention aims to provide a high-strength stepless concentric angle adjuster that can achieve bidirectional locking of the entire adjuster when the motor is not in operation.

[0004] Therefore, the technical solution adopted by the present invention is as follows: a high-strength stepless concentric angle adjuster, comprising a pressure plate, an upper plate, and a lower fixed plate arranged sequentially from top to bottom, wherein the pressure plate and the lower fixed plate are fixedly installed together. The lower fixed plate is provided with a rotating mechanism for realizing the rotation of the upper plate and a locking mechanism for preventing the upper plate from rotating when the rotating mechanism is not working. The locking mechanism includes a toothed plate that can rotate under the action of the rotating mechanism and an outer star wheel arranged on the upper plate, wherein the outer star wheel and the toothed plate are arranged vertically. A fixed plate is provided on the inner side of the toothed plate and the outer star wheel. A plurality of notches are provided at intervals on the inner side of the outer star wheel, and each notch is provided with a fixed plate. A pair of irregularly shaped locking blocks are provided, each equipped with a return spring. The toothed plate is provided with several levers, which are used to move the irregularly shaped locking blocks to slide in the slots. The slots gradually narrow from both ends to the middle, forming unlocking sections at both ends and locking sections in the middle. When the irregularly shaped locking block enters the locking section from the unlocking section, the outer peripheral surface of the irregularly shaped locking block only partially engages with the inner peripheral surface of the slot through surface contact or line contact in the middle. A notch is provided between the inner peripheral surface of the irregularly shaped locking block and the fixed plate. When the irregularly shaped locking block is locked, the normal of the contact area between the slot and the locking surface passes through the notch.

[0005] As a preferred embodiment of the above scheme, a lever is provided at each notch position on the toothed plate. The lever can extend between a pair of irregular locking blocks to push the irregular locking blocks on the corresponding side to slide in the notch when rotating forward or backward.

[0006] In a further preferred embodiment, the irregular locking block is provided with a pushing protrusion on the side near the notched end, and the outer star wheel is provided with a mating protrusion at the position corresponding to the pushing protrusion; when the irregular locking block is unlocked, under the push of the lever, the irregular locking block contacts the mating protrusion through the pushing protrusion, thereby driving the outer star wheel to rotate.

[0007] More preferably, the rotating mechanism includes a motor assembly located below the lower fixed plate. The rotating shaft of the motor assembly passes through the lower fixed plate and is provided with a small gear that can mesh with the outer teeth of the gear plate. The upper end of the small gear is provided with a motor bracket mounted on the lower fixed plate for the small gear.

[0008] In a further preferred embodiment, at least one rotating support plate is provided between the upper plate and the lower fixed plate, and between the upper plate and the pressure plate. The rotating support plate is made of a self-lubricating material with self-lubricating function, and at least one protrusion is provided on the rotating support plate. The pressure plate and the lower fixed plate are provided with positioning holes for the protrusion to extend into.

[0009] The beneficial effects of this invention are:

[0010] 1) In the locked state, the irregular locking block is locked in the notch under the action of the return spring. When the rotating component is working, the toothed plate drives the lever to rotate. The rotation of the lever pushes the irregular locking block on either side toward the unlocking section, so that the return spring is compressed at the same time as the unlocking. After the irregular locking block is unlocked, it drives the upper plate to rotate together. Through the combined action of the irregular locking block, the return spring and the notch, the entire mechanism is locked and cannot rotate when an external force is applied when the rotating component is not working. This not only ensures the overall strength, but also the stability of the locking. Furthermore, stepless adjustment is achieved through the irregular locking block and the return spring.

[0011] 2) Each slot is equipped with a pair of irregularly shaped locking blocks, and the lever is located in the middle of the irregularly shaped locking blocks, so that the entire locking structure can not only lock clockwise but also lock counterclockwise, and can also unlock in both directions, thus realizing bidirectional locking and unlocking.

[0012] 3) The notch adopts a structure that gradually narrows from both ends towards the middle, forming unlocking sections at both ends and a locking section in the middle. When the irregularly shaped locking block enters the locking section from the unlocking section, the outer circumferential surface of the irregularly shaped locking block only locks against the inner circumferential surface of the notch through surface contact or line contact in a localized area in the middle. A notch is provided between the inner circumferential surface of the irregularly shaped locking block and the fixed plate. When the irregularly shaped locking block is locked, the normal of the contact area between the notch and the locking surface passes through the notch, preventing the normal component of the force exerted by the external force on the outer star wheel from being transmitted to the irregularly shaped locking block and causing it to move. This special structural design utilizes the principle of the outer star wheel over-clutch. The outer star wheel is an irregularly shaped star wheel, and the fixed plate is an inner full circle. The locking mechanism used has a buckling structure to enhance the separation strength. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the present invention.

[0014] Figure 2 This is an exploded view of the present invention.

[0015] Figure 3 This is a schematic diagram of the locking mechanism in this invention.

[0016] Figure 4 This is an exploded view of the locking mechanism in this invention.

[0017] Figure 5 This is a schematic diagram of the locking mechanism in this invention.

[0018] Figure 6 This is a schematic diagram showing the line contact between the irregular locking block and the notch in this invention.

[0019] Figure 7 This is a schematic diagram showing the surface contact between the irregularly shaped locking block and the notch in this invention.

[0020] Figure 8 This is a schematic diagram of the rotating support plate in the present invention. Figure 1 (3D).

[0021] Figure 9 This is a schematic diagram of the rotating support plate in the present invention. Figure 2 .

[0022] Reference numerals: 1. Pressure plate, 2. Upper plate, 3. Lower fixed plate, 4. Toothed plate, 5. Outer star wheel, 5a. Notch, 5b. Matching protrusion, 6. Irregular locking block, 6b. Notch, 6c. Pushing protrusion, 7. Return spring, 8. Fixed plate, 9. Lever, 10. Motor assembly, 11. Pinion, 12. Motor bracket, 13. Rotating support plate, 13a. Protrusion, 13c. Oil storage hole, 13b. Arc-shaped protrusion section. Detailed Implementation

[0023] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0024] like Figures 1-9 As shown, a high-strength stepless concentric angle adjuster is suitable for automatic adjustment and rotation in displays, car seat chassis, etc. It mainly consists of a pressure plate 1, an upper plate 2, a lower fixed plate 3, a rotating mechanism, and a locking mechanism. The pressure plate 1, upper plate 2, and lower fixed plate 3 are arranged sequentially from top to bottom, and the pressure plate 1 is fixedly installed together with the lower fixed plate 3. Both the rotating mechanism and the locking mechanism are located on the lower fixed plate 3. The rotating mechanism enables the upper plate 2 to rotate, and the locking mechanism prevents the upper plate 2 from rotating when the rotating mechanism is not operating. Furthermore, the locking mechanism unlocks when the rotating mechanism is operating, allowing the upper plate to rotate.

[0025] The locking mechanism includes a toothed plate 4 that can rotate under the action of the rotating mechanism and an outer star wheel 5 located below the upper plate 2, with the toothed plate 4 and the outer star wheel 5 arranged vertically. Several notches 5a are spaced apart on the inner side of the outer star wheel 5, and each notch 5a contains a pair of irregularly shaped locking blocks 6 that can slide within the notch. A fixed plate 8 is located on the inner side of the toothed plate 4 and the outer star wheel 5, and the fixed plate is mounted on the lower fixed plate. The fixed plate and the notches form a sliding groove for the irregularly shaped locking blocks to slide back and forth.

[0026] To achieve locking of the irregularly shaped locking blocks, each irregularly shaped locking block 6 is equipped with a return spring 7. The notch 5a gradually narrows from both ends towards the middle, forming an unlocking section at both ends and a locking section in the middle. When the irregularly shaped locking block 6 moves from the unlocking section into the locking section, the outer peripheral surface of the irregularly shaped locking block 6 only partially engages with the inner peripheral surface of the notch 5a through surface or line contact in the middle for locking. That is, notches are formed on both sides of the outer peripheral surface of the irregularly shaped locking block. Figure 6 and 7 As shown. To ensure that the irregularly shaped locking block will not move freely due to shaking or vibration, the return spring is preloaded during installation.

[0027] To ensure that the entire mechanism will not rotate under external force when locked, a notch 6b is provided between the inner circumferential surface of the irregular locking block 6 and the fixed plate 8. When the irregular locking block 6 is locked, the normal of the contact area between the notch 5a and the locking surface 6a passes through the notch 6b, so as to prevent the normal component of the force of the external force acting on the outer star wheel when locked from being transmitted to the irregular locking block to drive the irregular locking block to move.

[0028] To achieve the unlocking rotation, several levers 9 are provided on the toothed plate 4. The levers 9 are used to move the irregular locking block 6 to slide in the notch 5a. When the rotating mechanism is working, it pushes the irregular locking block on the corresponding side to rotate, thereby enabling the irregular locking block to enter the unlocking section from the locking section to unlock and drive the outer star wheel to rotate.

[0029] Preferably, a lever 9 is provided on the toothed plate 4 at each position corresponding to the notch 5a, and the lever 9 can extend between a pair of irregular locking blocks 6 to push the irregular locking block 6 on the corresponding side to slide within the notch 5a when rotating forward or backward. Correspondingly, a return spring 7 is provided between each irregular locking block 6 and the end of the notch 5a, located within the notch.

[0030] To ensure stable rotation of the outer star wheel during operation of the rotating assembly, a pushing protrusion 6c is provided on the side of the irregular locking block 6 near the end of the notch 5a, and a mating protrusion 5b is provided on the outer star wheel 5 at the position corresponding to the pushing protrusion 6c. When the irregular locking block 6 is unlocked, under the push of the lever 9, the irregular locking block 6 contacts the mating protrusion 5b through the pushing protrusion 6c, thereby pushing the outer star wheel 5 to rotate. At this time, the return spring is on the side of the pushing protrusion away from the fixed plate, ensuring that the return spring can rotate with the outer star wheel.

[0031] As a preferred option, the lever 9 is designed with a U-shaped structure that is large at both ends and small in the middle, which not only ensures the contact area between the lever and the irregular locking block, but also helps to reduce weight.

[0032] Preferably, the inner circumferential surface of the notch 5a includes large arc surfaces at both ends and a small arc surface in the middle, with the centers of the large and small arc surfaces coinciding with the center of the toothed plate. A transition slope for clamping the irregularly shaped locking block is provided between the large and small arc surfaces. The inner diameter of the large arc surface is larger than that of the small arc surface, and the centers of both the large and small arc surfaces coincide with the center of the outer star wheel. Transition fillets are provided between the small arc surface and the transition slope, and between the large arc surface and the transition slope. When the locking surface and the notch are in line contact, the locking surface is set as a single arc surface. When the locking surface and the notch are in surface contact, the locking segment is set as multiple slopes, with the middle slope matching the middle transition slope of the radially outer side of the notch. As shown in Figure 6 and... Figure 7 As shown.

[0033] The rotating mechanism includes a motor assembly 10 located below the lower fixed plate 3. The rotating shaft of the motor assembly 10 passes through the lower fixed plate 3 and is provided with a small gear 11 that can mesh with the outer teeth of the gear plate 4. The upper end of the small gear 11 is provided with a motor bracket 12 mounted on the lower fixed plate 3 for the small gear 11.

[0034] At least one rotating support plate 13 is provided between the upper plate 2 and the lower fixed plate 3, and between the upper plate 2 and the pressure plate 1. The rotating support plate 13 is made of a self-lubricating material with self-lubricating function, so that it has its own lubrication effect, thereby reducing the coefficient of friction. For example, aluminum alloy-based self-lubricating material, rubber-based self-lubricating material, polyetheretherketone + carbon fiber, copper-based self-lubricating material, and graphite. Among them, aluminum alloy-based self-lubricating material has the characteristics of light weight, rubber-based self-lubricating material can absorb impact, and polyetheretherketone + carbon fiber has a wide applicable temperature range. Therefore, different materials can be selected as needed, so that the corresponding angle adjuster can maximize the performance.

[0035] To facilitate the installation of the rotating support plate, at least one protrusion 13a is provided on the rotating support plate 13. Correspondingly, positioning holes for the protrusion to extend into are provided on the lower fixing plate 3 and the pressure plate 1, so that after installation, the protrusion located between the lower fixing plate 3 and the upper plate 2 faces downward, and the protrusion located between the upper plate 2 and the pressure plate 1 faces upward.

[0036] The rotating support plates are configured as needed. When there is one rotating support plate 13 located between the upper plate 2 and the lower fixed plate 3, the rotating support plate 13 is set as an annular shape. When there are two or more rotating support plates 13, the rotating support plates 13 are set as arc-shaped shapes. Preferably, there are four rotating support plates.

[0037] Preferably, an oil storage hole 13c is provided on the side of the rotating support plate 13 away from the protrusion 13a, corresponding to the position of the protrusion 13a and used to store solid lubricant, so that the stored solid lubricant can flow out on the surface with relative movement, which can further reduce friction. The solid lubricant can be tungsten disulfide, which facilitates continuous lubrication and makes the friction coefficient fluctuation less than 5%.

[0038] Rotary support plates of different thicknesses can be set according to load requirements. The thickness of the rotary support plate is between 0.5-10mm. In order to eliminate the gap caused by the thickness of the lead material, an upward or downward arc protrusion section 13b is provided on the rotary support plate 13 near the protrusion 13a, and the orientation of the arc protrusion section 13b is opposite to that of the protrusion 13a.

[0039] When there are two or more protrusions 13a on the rotating support plate 13, the arc-shaped protrusion 13b is located between two adjacent protrusions 13a. When there is only one protrusion 13a on the rotating support plate 13, arc-shaped protrusions 13b are provided on both sides of the protrusion 13a, and the arc-shaped protrusions 13b are not provided on the end of the rotating support plate 13.

[0040] Preferably, the width of the part on the rotating support plate 13 where the protrusion 13a is provided is greater than the width of the other parts.

Claims

1. A high-strength stepless concentric angle adjuster, comprising a pressure plate (1), an upper plate (2), and a lower fixing plate (3) arranged sequentially from top to bottom, wherein the pressure plate (1) and the lower fixing plate (3) are fixedly installed together, and the lower fixing plate (3) is provided with a rotating mechanism for realizing the rotation of the upper plate (2) and a locking mechanism for preventing the upper plate (2) from rotating when the rotating mechanism is not in operation, characterized in that: The locking mechanism includes a toothed plate (4) that can rotate under the action of a rotating mechanism and an outer star wheel (5) set on the upper plate (2). The outer star wheel (5) and the toothed plate (4) are arranged vertically. A fixed plate (8) is provided on the inner side of the toothed plate (4) and the outer star wheel (5). Several notches (5a) are provided at intervals on the inner side of the outer star wheel (5). Each notch (5a) is provided with a pair of irregular locking blocks (6) that can slide in the notch (5a). Each irregular locking block (6) is equipped with a return spring (7). Several levers (9) are provided on the toothed plate (4). The levers (9) are used for The irregular locking block (6) slides in the notch (5a) by being moved. The notch (5a) gradually narrows from both ends to the middle, forming an unlocking section at both ends and a locking section in the middle. When the irregular locking block (6) moves from the unlocking section to the locking section, the outer peripheral surface of the irregular locking block (6) is only partially locked by surface contact or line contact with the inner peripheral surface of the notch (5a) in the middle. A notch (6b) is provided between the inner peripheral surface of the irregular locking block (6) and the fixed plate (8). When the irregular locking block (6) is locked, the normal of the contact area between the notch (5a) and the locking surface (6a) passes through the notch (6b).

2. The high-strength stepless concentric angle adjuster according to claim 1, characterized in that: A lever (9) is provided at each position corresponding to each notch (5a) on the toothed plate (4). The lever (9) can be inserted between a pair of irregular locking blocks (6) to push the irregular locking block (6) on the corresponding side to slide in the notch (5a) when rotating forward and backward.

3. The high-strength stepless concentric angle adjuster according to claim 1, characterized in that: The irregular locking block (6) has a pushing protrusion (6c) on one side near the end of the notch (5a), and the outer star wheel (5) has a matching protrusion (5b) at the position corresponding to the pushing protrusion (6c). When the irregular locking block (6) is unlocked, under the push of the lever (9), the irregular locking block (6) contacts the matching protrusion (5b) through the pushing protrusion (6c), thereby driving the outer star wheel (5) to rotate.

4. The high-strength stepless concentric angle adjuster according to claim 1, characterized in that: The rotating mechanism includes a motor assembly (10) located below the lower fixed plate (3). The rotating shaft of the motor assembly (10) passes through the lower fixed plate (3) and is provided with a small gear (11) that can mesh with the outer teeth of the gear plate (4). The upper end of the small gear (11) is provided with a motor bracket (12) mounted on the lower fixed plate (3) and used for the small gear (11).

5. The high-strength stepless concentric angle adjuster according to claim 1, characterized in that: At least one rotating support plate (13) is provided between the upper plate (2) and the lower fixed plate (3), and between the upper plate (2) and the pressure plate (1). The rotating support plate (13) is made of a self-lubricating material with self-lubricating function. At least one protrusion (13a) is provided on the rotating support plate (13). The pressure plate (1) and the lower fixed plate (3) are provided with positioning holes for the protrusion (13a) to extend into.

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