One-way force transmission mechanism

Abstract

The utility model discloses a one -way force transmission mechanism belongs to transmission component technical field, the utility model discloses through being established in the lock -up cavity of cooperation of locking block in driven end, locking block is worn on the driving shaft through its cylinder department gap, when driving end promotes locking block rotation, locking block is in the convergent state in driving end and driven end space, and driving end axle passes through locking block and makes medium and will upstream power transmission to downstream, on the contrary, after driving end stops action, locking block is in the divergent state in driving end and driven end space, and if driven end exists rotary force, then driven end passes through locking block and cuts off the power of downstream as medium, thereby realizes the locking of mechanism. The utility model discloses simple structure, durable performance is reliable, and the strong anti - attenuation ability, the utility model runs reliably, and locking block will move and lock -up gap always control in reasonable range, make this mechanism run more reliable, the utility model discloses high expandability, the utility model discloses compact structure size.

Description

Technical Field

[0001] This utility model belongs to the field of transmission component technology, and is particularly related to a unidirectional force transmission mechanism. Background Technology

[0002] Patent publication number CN222526742U discloses a paddle-type bidirectional reverse-stop transmission mechanism. Its structure includes an input shaft and an output shaft rotatably mounted on a housing. One-way bushings two and one-way bushing one are rotatably mounted on the housing around an axis via one-way bearings, with one-way bushings two and one-way bushing one rotating in opposite directions to the housing. The axes of the input shaft, output shaft, one-way bushings two, and one-way bushing one are coaxial, and the input shaft and output shaft pass through the centers of one-way bushings two and one-way bushing one, respectively. An intermediate pressure plate is provided on the output shaft, engaging with it helically. Force transmission disc one and force transmission disc two are fixed on the output shaft. In the axial direction, one-way bushing two and force transmission disc two, and force transmission disc one and one-way bushing one, are located on either side of the intermediate pressure plate, respectively. An arc-shaped groove is formed on the second force transmission plate. A lever, which drives the intermediate pressure plate to rotate relative to the output shaft, is positioned between the axially opposite input shaft and the intermediate pressure plate. It passes through the arc-shaped groove. When the input shaft rotates by an angle α, the lever drives the intermediate pressure plate to rotate by an angle α relative to the output shaft. The intermediate pressure plate moves axially from limit position 2 to limit position 1. The central angle of the arc-shaped groove is not less than angle α. When the intermediate pressure plate is in limit position 1, it presses against the first force transmission plate and the first one-way bushing, forming a friction transmission structure capable of transmitting torque. When the intermediate pressure plate is in limit position 2, it presses against the second force transmission plate and the second one-way bushing, forming a friction transmission structure capable of transmitting torque.

[0003] When the input shaft rotates in one direction, it drives the output shaft to rotate in the forward direction; when the input shaft rotates in the opposite direction, it drives the output shaft to rotate in the reverse direction. This can be either clockwise rotation of the input shaft driving the output shaft to rotate in the forward direction, or counterclockwise rotation of the input shaft driving the output shaft to rotate in the reverse direction, or counterclockwise rotation of the input shaft driving the output shaft to rotate in the forward direction, or clockwise rotation of the input shaft driving the output shaft to rotate in the reverse direction.

[0004] However, this structure has disadvantages compared to existing structures on the market, such as ratchet pawl clutches and one-way clutches, including non-compact structural movement, uncontrollable operating range, and lower anti-aging performance. Utility Model Content

[0005] To address the problems existing in the aforementioned background technology, this utility model proposes a unidirectional force transmission mechanism with simple structure, reliable durability, and strong resistance to attenuation.

[0006] Therefore, the present invention adopts the following technical solution: a unidirectional force transmission mechanism, including a support frame base, a driven end, a locking block assembly, and an active end; The support frame base has a circular mounting cavity for mounting and positioning the driven end, locking block assembly, and driving end. The head of the driven end extends into the front part of the circular mounting cavity, and the tail of the driving end extends into the rear part of the circular mounting cavity. The head of the driven end and the tail of the driving end are connected by the locking block assembly. The locking block assembly locks the switching of the driving end and the driving end. This switching of the driving end includes stopping the clockwise rotation of the driving end and stopping the counterclockwise rotation of the driving end.

[0007] The locking block assembly includes at least one counterclockwise locking block, at least one clockwise locking block, and a locking cavity formed on the end face of the driven end to cooperate with the locking blocks. The counterclockwise and clockwise locking blocks are alternately arranged in the locking cavity. The tail of each locking block has a cylindrical portion, and the driving end has an elliptical hole for accommodating the cylindrical portion. The cylindrical portion is housed in the elliptical hole, wherein the counterclockwise locking block corresponds to the cavity wall of the locking cavity in the counterclockwise direction. The clockwise locking block mates with the wall of the locking cavity in the clockwise direction. The outer edge of the wall of the clockwise locking cavity of the locking cavity housing the counter-clockwise locking block is recessed, and the tail end of the driving end has an arc-shaped overhang extending into this recessed space. The outer edge of the wall of the clockwise locking cavity housing the clockwise locking block is recessed, and the tail end of the driving end has an arc-shaped overhang extending into this recessed space. Both ends of the two arc-shaped overhangs are directly opposite the adjacent counter-clockwise and clockwise locking blocks, and have a gap space. Its working principle is as follows: When the driving end outputs power counter-clockwise, the driving end pushes the locking block to press against the driven end. At this time, the gap on the inclined surface of the driven end of the counter-clockwise locking block moves in the direction of increasing, and the locking block does not function, only acting as a force transmission medium. When the driving end outputs power clockwise, the force situation is the same. When the driving end stops and the driven end is subjected to counterclockwise force, the two counterclockwise locking blocks tend to move clockwise due to the obstruction of the locking groove on the driving end. At this time, the clearance of the inclined surface on the driven end moves in the direction of decreasing, and the mechanism is locked. Similarly, when the driving end stops and the driven end is subjected to clockwise force, the two clockwise locking blocks tend to move counterclockwise due to the obstruction of the locking groove on the driving end. At this time, the clearance of the inclined surface on the driven end moves in the direction of decreasing, and the mechanism is locked.

[0008] The counterclockwise locking block has a turning surface with a turning structure on its outer wall in the counterclockwise direction, and a smooth inclined surface on its outer wall in the clockwise direction; the clockwise locking block has a turning surface with a turning structure on its outer wall in the clockwise direction, and a smooth inclined surface on its outer wall in the counterclockwise direction; the inner bottom of both the counterclockwise and clockwise locking blocks has an arc-shaped structure.

[0009] Both the counterclockwise locking block and the clockwise locking block are provided in two pieces.

[0010] One side of the circular mounting cavity is provided with an annular stepped surface, and the active end has a step that mates with the annular stepped surface. The other side of the circular mounting cavity is provided with a stepped groove, and the driven end is provided with a stepped surface that is flush with the bottom surface of the stepped groove. The bottom surface of the stepped groove and the stepped surface are pressed and positioned on the stepped groove by an end cover plate, thereby playing a role in axially limiting the active end and the driven end.

[0011] The end cover plate is fixedly connected to the support frame base by interference fit, thus fixing the entire mechanism as a whole.

[0012] The outer side wall of the support frame base is provided with an outward protrusion, which facilitates interference fixing to other fixed seats, or the support frame base can be used as a fixed seat.

[0013] This invention achieves the following beneficial effects: 1. By opening a locking cavity at the driven end to cooperate with the locking block, the locking block is mounted on the drive shaft through the gap in its cylindrical portion. When the drive end pushes the locking block to rotate, the locking block is in a convergent state within the space between the drive and driven ends. The drive shaft transmits upstream power to downstream through the locking block as a medium. Conversely, after the drive end stops moving, the locking block is in a divergent state within the space between the drive and driven ends. If there is rotational force at the driven end, the driven end cuts off the downstream power through the locking block as a medium, thereby achieving locking of the mechanism. 2. This invention has a simple structure, reliable durability, and strong resistance to attenuation. The invention operates reliably, with the locking block always controlling the movement and locking gap within a reasonable range, making the mechanism more reliable. This invention has high scalability, with a compact structure, and can be extended to many similar applications. The unidirectional transmission module of this invention can be applied to scenarios requiring unidirectional force transmission, such as robots, industrial equipment, and vehicle products, and can also be applied to similar scenarios such as aerospace, intelligent vehicles, high-speed trains, and commercial vehicles. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the disassembled structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the structure from the main view direction of this utility model.

[0016] Figure 3 This is a schematic diagram of the left-side structure of this utility model.

[0017] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure at point AA.

[0018] Figure 5 for Figure 2 Schematic diagram of the cross-sectional structure at point BB.

[0019] Figure 6 for Figure 3 Schematic diagram of the cross-sectional structure at the CC section. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. The described embodiments are only for illustration and explanation of this utility model and do not constitute the only limitation of this utility model.

[0021] like Figures 1-6 As shown, this embodiment includes a support base 1, a driven end 2, a locking block assembly 3, and an active end 4. A circular mounting cavity is provided on the support base 1 for mounting and positioning the driven end 2, the locking block assembly 3, and the active end 4. The head of the driven end 2 extends into the front part of the circular mounting cavity, and the tail of the active end 4 extends into the rear part of the circular mounting cavity. The head of the driven end 2 and the tail of the active end 4 are connected by the locking block assembly 3. The locking block assembly 3 is used to lock the switching of the action between the driven end and the active end. The action switching includes stopping the clockwise rotation of the active end and stopping the counterclockwise rotation of the active end.

[0022] The locking block assembly 3 includes at least one counterclockwise locking block 3-2, at least one clockwise locking block 3-1, and locking cavities that mate with the locking blocks, provided on the end face of the driven end 2. The counterclockwise and clockwise locking blocks are arranged in pairs, with the counterclockwise locking block 3-2 and clockwise locking block 3-1 alternately arranged within the locking cavity. The tail of each locking block has a cylindrical portion 3-3, and the driving end 4 has an elliptical hole that accommodates the cylindrical portion 3-3. The cylindrical portion 3-3 is housed within this elliptical hole. The counterclockwise locking block 3-2 mates with the cavity wall of the locking cavity in the counterclockwise direction. The clockwise locking block 3-1 corresponds to and fits with the cavity wall of the clockwise locking cavity; the outer edge of the cavity wall of the clockwise locking cavity accommodating the counterclockwise locking block 3-2 is recessed, and the tail end of the driving end 4 has an arc-shaped overhang 4-1 extending into the recessed space; the outer edge of the cavity wall of the clockwise locking cavity accommodating the clockwise locking block 3-1 is recessed, and the tail end of the driving end has an arc-shaped overhang 4-1 extending into the recessed space. Both ends of the two arc-shaped overhangs 4-1 are directly opposite the adjacent counterclockwise locking block 3-2 and clockwise locking block 3-1, and have a gap space. Its working principle is as follows: When the driving end outputs power counterclockwise, it pushes the locking block to press against the driven end. At this time, the clearance of the driven end's inclined surface in the counterclockwise locking block moves in the direction of increasing, and the locking block does not play a role, only acting as a force transmission medium. When the driving end outputs power clockwise, the force situation is the same. When the driving end stops and the driven end is subjected to counterclockwise force, the two counterclockwise locking blocks tend to move clockwise under the obstruction of the locking groove of the driving end. At this time, the clearance of the driven end's inclined surface moves in the direction of decreasing, and the mechanism is locked. Similarly, when the driving end stops and the driven end is subjected to clockwise force, the two clockwise locking blocks tend to move counterclockwise under the obstruction of the locking groove of the driving end. At this time, the clearance of the driven end's inclined surface moves in the direction of decreasing, and the mechanism is locked.

[0023] The counterclockwise locking block has a turning surface with a turning structure on its outer wall in the counterclockwise direction, and a smooth inclined surface on its outer wall in the clockwise direction; the clockwise locking block has a turning surface with a turning structure on its outer wall in the clockwise direction, and a smooth inclined surface on its outer wall in the counterclockwise direction; the inner bottom of both the counterclockwise and clockwise locking blocks has an arc-shaped structure.

[0024] In this preferred embodiment, both the counterclockwise locking block 3-2 and the clockwise locking block 3-1 are provided in two parts.

[0025] Additionally, one side of the circular mounting cavity is provided with an annular stepped surface 1-2, and the driving end 4 has a step that mates with this annular stepped surface. The other side of the circular mounting cavity is provided with a stepped groove, and the driven end 2 is provided with a stepped surface flush with the bottom surface of the stepped groove. The bottom surface of the stepped groove and the stepped surface are pressed and positioned onto the stepped groove by the end cover plate 5, thereby limiting the axial movement of the driving end and the driven end. The end cover plate 5 is fixedly connected to the support frame base 1 by an interference fit, fixing the entire mechanism as a whole.

[0026] The outer side wall of the support frame base 1 is provided with an outwardly protruding part 1-1, which facilitates interference fixing to other fixed seats.

[0027] The driven end transmits power from the upstream to the downstream component and also participates in the locking function. The driven end can extend its connection with the load through riveting or other methods. The driven end is relatively short and its material can be easily changed. The locking block assembly is the main component required for the locking function and also serves as the main sliding medium during power transmission. It is set according to actual needs. The active end transmits power to the next level component. The presence of the active shaft optimizes the motion space and improves the power transmission path. The active end can extend its connection with the power source through riveting or other methods. The active end is relatively short and its material can be easily changed.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A unidirectional force transmission mechanism, characterized in that: The unidirectional force transmission mechanism includes a support frame base (1), a driven end (2), a locking block assembly (3), and an active end (4); The support frame base (1) has a circular mounting cavity for mounting and positioning the driven end (2), locking block assembly (3), and driving end (4). The head of the driven end (2) extends into the front part of the circular mounting cavity, and the tail of the driving end (4) extends into the rear part of the circular mounting cavity. The head of the driven end (2) and the tail of the driving end (4) are connected by the locking block assembly (3). The locking block assembly (3) is used to lock the action switching between the driven end and the driving end. The action switching includes stopping the clockwise rotation of the driving end and stopping the counterclockwise rotation of the driving end.

2. The unidirectional force transmission mechanism according to claim 1, characterized in that: The locking block assembly (3) includes at least one counterclockwise locking block (3-2), at least one clockwise locking block (3-1), and a locking cavity provided on the end face of the driven end (2) that cooperates with the locking blocks. The counterclockwise locking blocks and the clockwise locking blocks are arranged in pairs, and the counterclockwise locking blocks (3-2) and the clockwise locking blocks (3-1) are arranged alternately in the locking cavity. The tail of the locking block is provided with a cylindrical part (3-3), and the driving end (4) is provided with an elliptical hole that can accommodate the cylindrical part (3-3). The cylindrical part (3-3) is accommodated in the elliptical hole. The counterclockwise locking block (3-2) and the locking block in the counterclockwise direction are provided with a locking cavity. The cavity walls of the locking chambers are correspondingly fitted, and the clockwise locking block (3-1) is correspondingly fitted to the cavity walls of the locking chambers in the clockwise direction; the outer edge of the cavity wall of the locking chamber accommodating the counterclockwise locking block (3-2) is recessed in the clockwise direction, and the tail end of the active end (4) has an arc-shaped overhang (4-1) extending into the recessed space; the outer edge of the cavity wall of the locking chamber accommodating the clockwise locking block (3-1) is recessed in the counterclockwise direction, and the tail end of the active end has an arc-shaped overhang (4-1) extending into the recessed space, and both ends of the two arc-shaped overhangs (4-1) are directly opposite the adjacent counterclockwise locking block (3-2) and clockwise locking block (3-1), and have a gap space.

3. The unidirectional force transmission mechanism according to claim 2, characterized in that: The counterclockwise locking block has a turning surface with a turning structure on its outer wall in the counterclockwise direction, and a smooth inclined surface on its outer wall in the clockwise direction; the clockwise locking block has a turning surface with a turning structure on its outer wall in the clockwise direction, and a smooth inclined surface on its outer wall in the counterclockwise direction; the inner bottom of both the counterclockwise and clockwise locking blocks has an arc-shaped structure.

4. The unidirectional force transmission mechanism according to claim 3, characterized in that: The counterclockwise locking block (3-2) and the clockwise locking block (3-1) are both provided in two parts.

5. A unidirectional force transmission mechanism according to claim 4, characterized in that: The circular mounting cavity has an annular stepped surface (1-2) on one side, the active end (4) has a step that matches the annular stepped surface, the circular mounting cavity has a stepped groove on the other side, the driven end (2) has a stepped surface that is flush with the bottom surface of the stepped groove, and the bottom surface of the stepped groove and the stepped surface are pressed and positioned on the stepped groove by the end cover plate (5).

6. The unidirectional force transmission mechanism according to claim 5, characterized in that: The end cover plate (5) is fixedly connected to the support frame base (1) by interference fit, thus fixing the whole mechanism as a whole.

7. A unidirectional force transmission mechanism according to claim 6, characterized in that: The outer side wall of the support frame base (1) is provided with an outward protrusion (1-1), which can be easily interference-fixed to other fixed seats, or the support frame base (1) can be used as a fixed seat.

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