High-precision positioning double-buffering rocker transmission mechanism

Abstract

The utility model discloses a high-precision positioning double-buffering rocker transmission mechanism, and relates to the field of transmission mechanisms, the transmission mechanism comprises a transmission shaft, a rocker rotatably sleeved on the transmission shaft, and a spring sleeved on the transmission shaft and matched with the rocker, one end of the spring is fixed on the transmission shaft, and the other end of the spring is fixed on the transmission shaft. The other end of the spring abuts against the rocker through the elastic effect, and the end of the spring is in restrained connection with the rocker, so that elastic support is provided in the axial direction, and meanwhile the rocker is limited and positioned in the circumferential direction; the transmission shaft is provided with a limiting component extending out in the radial direction, and correspondingly, the rocker is provided with a limiting groove matched with the limiting component. The rocker transmission mechanism is low in cost and high in angle positioning precision, and has the buffering functions of double buffering and uniform buffering force.

Description

Technical Field

[0001] This application relates to the field of transmission mechanisms, and particularly to a double-buffered rocker transmission mechanism with high-precision positioning. Background Art

[0002] The rocker mechanism is a typical mechanical transmission mechanism and is widely used in various mechanical devices. Its core function is to convert the input driving force into the rotational motion of the transmission shaft through the rocker, thereby achieving the required actions or force transmission. Generally, one end of the rocker of this mechanism is connected to a driving source (such as a motor, cylinder, etc.), and the other end is connected to the transmission shaft. When the driving source applies a thrust or a pull force, the rocker rotates around a fixed point or a hinge point, driving the transmission shaft to rotate a specific angle and completing the corresponding mechanical action. For example, the rocker mechanism is commonly used in vehicle transmission systems, industrial robotic arms, the transmission mechanism of parking space locks, etc., to precisely control the angular changes of certain moving parts.

[0003] In traditional rocker mechanisms, when the transmission shaft needs to rotate a large angle or encounters a sudden large load, the connection between the rocker and the transmission shaft may bear extremely high mechanical stress. Without a buffering function, the external force borne by the rocker will concentrate on the key positions where it is connected to the transmission shaft, resulting in material stress overload in these parts. Common consequences include: plastic deformation, fatigue fracture of the rocker or the transmission shaft, and even failure of the entire mechanism. This problem is particularly obvious in some high-speed or heavy-load equipment, where the durability and reliability of the mechanism are poor, easily causing equipment failures, leading to shutdowns or repairs, and even posing safety hazards.

[0004] To address these problems, some rocker mechanisms with buffering functions have been developed in the industry, which add buffering elements between the rocker and the transmission shaft. Common buffering devices include springs, rubber buffer blocks, hydraulic shock absorbers, etc. These elements can absorb part of the impact force, convert the instantaneous large force into a relatively gentle and dispersed force, protect the connection between the rocker and the transmission shaft, and reduce mechanical damage caused by overload.

[0005] For example, in a rocker mechanism with spring buffering, when driving, the spring will compress or stretch according to the input driving force, absorb part of the force and then transmit the force to the transmission shaft. The hydraulic buffering device relieves the rapid force transmission through the damping effect of liquid flow, making the movement of the rocker and the transmission shaft smoother. This design effectively reduces the failure risk of the rocker mechanism under heavy loads and extends the service life of the mechanism.

[0006] However, the rocker mechanism with a buffering function is not a perfect solution. First, there is an increase in manufacturing and maintenance costs. Due to the complexity of the buffering structure, especially the hydraulic and spring systems, the number of parts and the assembly difficulty increase, resulting in a significant rise in manufacturing costs and relatively high later maintenance and replacement costs. Second, there is the issue of angular positioning accuracy. Due to the presence of the buffering device, it is difficult to achieve very precise control of the angle of the transmission shaft. In high-precision mechanical equipment, the elasticity of the buffering element or the hysteresis of the hydraulic buffer will introduce angular errors, making it impossible to ensure that the transmission shaft can accurately reach the set position.

[0007] Generally speaking, although the rocker mechanism with a buffering function improves the stability and durability of the traditional rocker mechanism under high loads, it still faces problems such as high manufacturing costs, poor angular positioning accuracy, and a single and uneven buffering effect in practical applications. Summary of the Utility Model

[0008] The purpose of this application aims to at least overcome one deficiency existing in the prior art, and provides a double-buffering rocker transmission mechanism with high-precision positioning. This rocker transmission mechanism has low costs, high angular positioning accuracy, and provides a buffering function with double buffering and uniform buffering force.

[0009] To achieve the above purpose, this application discloses a double-buffering rocker transmission mechanism with high-precision positioning. This transmission mechanism includes a transmission shaft, a rocker rotatably sleeved on the transmission shaft, and a spring sleeved on the transmission shaft and cooperating with the rocker. Among them, one end of the spring is fixed on the transmission shaft, thereby circumferentially constraining and axially limiting this end of the spring. The other end of the spring presses against the rocker through elastic action, and this end forms a constrained connection with the rocker, so as to provide elastic support axially while realizing the restriction and positioning of the rocker in the circumferential direction; a radially protruding limiting component is provided on the transmission shaft. Relatively, a limiting groove adapted to the limiting component is provided on the rocker. Under the axial thrust of the spring, the limiting groove of the rocker and the limiting component of the transmission shaft achieve detachable engagement, thereby axially and circumferentially constraining and positioning the movement of the rocker.

[0010] In some embodiments, an adjustable spring fixing sleeve is provided on the transmission shaft to fix one end of the spring. By adjusting the position of the spring fixing sleeve, the initial axial elastic force between the spring and the rocker is further adjusted.

[0011] Furthermore, the spring fixing sleeve is an annular structure. A first hole parallel to the axis and a second hole perpendicular to the axis are provided on this annular structure. Among them, the first hole is used for hooking and connecting with one end of the spring, and the second hole has internal thread. A screw passes through the second hole and presses against the transmission shaft to fix the annular structure on the transmission shaft.

[0012] In some embodiments, the limiting groove is a V-shaped groove, and the opening of the V-shaped groove has an arc-shaped guiding transition surface.

[0013] In some embodiments, the limiting component on the transmission shaft is a detachable pin, and correspondingly, a radial hole that cooperates with the pin is provided on the transmission shaft.

[0014] In some embodiments, the rocker includes a ring sleeve with a limiting groove on the end face and a rocker arm connected to the ring sleeve; the rocker arm and / or the ring sleeve are in contact with the spring, and one end of the spring is connected to the rocker arm through a hook.

[0015] In some embodiments, the transmission shaft is provided with a bolt for fixing one end of the spring, and the bolt is connected and cooperated with the end of the spring to constrain the spring circumferentially and axially.

[0016] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0017] 1. Improve the angle positioning accuracy: By setting the limit components and limit grooves, the axial and circumferential positioning of the rocker is effectively achieved, solving the problem of poor angle positioning accuracy of the traditional buffer rocker mechanism.

[0018] 2. Uniform buffering force: The double buffering design provides uniform buffering force through the cooperation of springs and limit grooves, alleviating the problem of uneven force of traditional rocker mechanisms under high loads.

[0019] 3. Reduce costs: Compared with complex hydraulic buffer designs, this transmission mechanism achieves dual buffer functions through simple springs and limit structures, with lower manufacturing and maintenance costs.

[0020] 4. Adjustable elastic force: By setting an adjustable spring fixing sleeve, the initial elastic force of the spring can be adjusted according to actual needs, which improves the flexibility and applicability of the system.

[0021] The above-listed beneficial effects are not exhaustive of all advantages. Other potential beneficial effects and detailed technical implementations will be further disclosed in the examples or other description parts of this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] After reading the following detailed description in conjunction with the accompanying drawings, you will have a better understanding of various aspects of the present disclosure. The positions, sizes, and ranges of various structures shown in the accompanying drawings sometimes do not represent the actual positions, sizes, and ranges. In the accompanying drawings:

[0023] Figure 1 It is a structural schematic diagram of an embodiment disclosed in this application.

[0024] Figure 2 It is a structural schematic diagram of an embodiment disclosed in the present application from another perspective.

[0025] Figure 3 It is a schematic structural diagram of a spring fixing sleeve in an embodiment disclosed in the present application.

[0026] Figure 4 It is a schematic structural diagram of another embodiment disclosed in the present application. Detailed implementation manners

[0027] The present disclosure will be described below with reference to the accompanying drawings, in which several embodiments of the present disclosure are shown. However, it should be understood that the present disclosure can be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present disclosure more complete and fully explain the protection scope of the present disclosure to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0028] It should be understood that in all the drawings, the same reference numerals represent the same elements. In the drawings, for clarity, the dimensions of some features may be deformed.

[0029] It should be understood that the terms used in the specification are only for describing specific embodiments and are not intended to limit the present disclosure. All terms used in the specification (including technical terms and scientific terms) have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of brevity and / or clarity, the technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the authorized specification.

[0030] The singular forms "a", "the", and "said" used in the specification include the plural forms unless clearly specified. The terms "comprising", "including", and "containing" used in the specification indicate the presence of the claimed features, but do not exclude the presence of one or more other features. The term "and / or" used in the specification includes any and all combinations of one or more of the related listed items. Embodiment 1:

[0031] As Figures 1-3 shown, this embodiment provides a double-buffered rocker transmission mechanism with high-precision positioning, including a transmission shaft 1, a rocker 2, a spring 3, and a limiting component 4. The core design of this transmission mechanism is to achieve axial and circumferential constraints on the rocker 2 through the interaction between the limiting component 4 and the rocker 2, and at the same time achieve the double-buffered function through the spring 3, so that the rocker 2 can have precise positioning and stable buffering effects during the transmission process.

[0032] In terms of the specific structure, first, the transmission shaft 1 of the transmission mechanism serves as the transmission and conveying component of the entire system, and the rocker 2 is rotatably sleeved on the transmission shaft 1. To achieve the initial positioning of the rocker 2, a radially protruding limiting component 4 is provided on the transmission shaft 1. As shown in the figure, in this embodiment, the limiting component 4 is a pin, and the pin is installed along the radial direction of the transmission shaft 1, forming a cross with the transmission shaft 1.

[0033] Specifically, in this embodiment, the overall structure of the rocker 2 includes a ring sleeve 201 and a rocker arm 202 connected to the ring sleeve 201. The main function of the ring sleeve 201 is to enable the rocker 2 to freely rotate around the transmission shaft 1 by being sleeved on the transmission shaft 1. The inner diameter of the ring sleeve 201 matches the outer diameter of the transmission shaft 1 to ensure that the rocker 2 can rotate smoothly without jamming, and at the same time, it also ensures the stability of the rocker 2.

[0034] Another important structure of the rocker 2 is the rocker arm 202. The rocker arm 202 is connected to the ring sleeve 201 and undertakes the main function of interacting with the external system. The rocker arm 202 can be designed into different shapes and lengths according to the requirements of specific applications to adapt to different working needs. For example, the rocker arm 202 can be linked with other mechanical systems or used to control other components in the transmission system. The presence of the rocker arm 202 enables the rocker 2 not only to flexibly access the external power source but also to have the ability to transmit force and motion outward in the reverse direction.

[0035] To achieve the precise positioning of the rocker 2, two symmetric limiting grooves 7 are designed on the end face of the ring sleeve 201 of the rocker 2. The limiting grooves 7 are engaged with the limiting component 4 on the transmission shaft 1, that is, the pin, to achieve the precise positioning of the rocker 2 in the initial state. The limiting groove 7 is a V-shaped groove, and an arc-shaped guiding transition surface is designed at its opening to ensure that the limiting component 4 can be smoothly embedded and slide in place. The inclined surface structure of the V-shaped groove can provide a locking torque in the circumferential direction of the rocker 2, accurately locking the relative position between the rocker 2 and the transmission shaft 1. This locking torque has a maximum value called the maximum locking torque. When the transmission load exceeds the maximum locking torque, the rocker 2 and the transmission shaft 1 rotate relative to each other, that is, a buffering effect is generated. The force between the inclined surface and the limiting component 4 prevents the rocker 2 from deviating from the locked position, ensuring the stability of the rocker 2 in the axial and circumferential directions. The symmetric design of the V-shaped groove means that no matter whether the rocker 2 rotates clockwise or counterclockwise, the cooperation between the limiting component 4 and the groove wall will generate a restoring force, providing a symmetric buffering effect.

[0036] In addition, to achieve the connection and cooperation between the rocker 2 and the spring 3, a spring mounting hole for hooking the spring 3 is provided on the rocker arm 202. The other end of the spring 3 is matched with the spring mounting hole of the rocker 2 through a hooking structure, ensuring that the spring 3 synchronously undergoes torsional deformation following the rocker 2 during the rotation of the rocker 2, and using the spring 3 to achieve the circumferential elastic limit of the rocker 2. The relative movement generated by the cooperation of the limiting component 4 and the limiting groove 7 enables the spring 3 to be compressed and torsionally deformed during operation. When relative movement occurs between the rocker 2 and the transmission shaft 1, the spring 3 is gradually compressed and twisted, providing axial pressure and circumferential restoring force for the rocker 2.

[0037] It should be understood that the double-buffering function of this transmission mechanism is achieved respectively by the connection and cooperation between the spring 3 and the rocker 2, and the coordinated action of the V-shaped groove and the pin. In terms of the specific structure, the spring 3 is sleeved on the transmission shaft 1 and forms a mating connection with the rocker 2. One end of the spring 3 is fixed on the transmission shaft 1. Specifically, the spring 3 is axially and circumferentially fixed through a spring fixing sleeve 5 installed on the transmission shaft 1. The other end of the spring 3 presses against the rocker 2 through elastic action, forming an axial constraint with the rocker 2. More specifically, the spring fixing sleeve 5 is of an annular structure. The spring fixing sleeve 5 is provided with a first hole 501 parallel to the axis for hooking and connecting with one end of the spring 3, and another second hole 502 perpendicular to the axis. A thread is provided in this hole, and the screw rod 6 passes through this hole and presses against the transmission shaft 1 to ensure that the spring fixing sleeve 5 is firmly fixed on the transmission shaft 1.

[0038] When the relative rotation angle between the rocker 2 and the transmission shaft 1 is relatively small, the sliding of the inclined plane of the V-shaped groove is the main buffering mechanism. When the pin slides along the V-shaped groove surface, the structure of the V-shaped groove provides the main buffering force for the rocker 2; when the rotation angle of the rocker 2 further increases, the inclined plane of the V-shaped groove gradually becomes flat, and the buffering force provided by the V-shaped groove weakens. The torsion of the spring 3 is proportional to the magnitude of its torsional deformation. At this time, the spring 3 undertakes the main buffering role through its own torsional deformation. When the relative angle between the rocker 2 and the transmission shaft 1 reaches 90 degrees, that is, when the pin slides to the top plane of the V-shaped groove, the restoring force provided by the V-shaped groove is zero, and the torque of the spring 3 reaches the maximum value within the 90-degree stroke and provides all the restoring force. The two buffering forces cooperate with each other to form a double-buffering mechanism, making the buffering force uniform and stable throughout the buffering stroke. Through the elastic deformation of the spring 3, the relative movement of the rocker 2 on the transmission shaft 1 can be effectively absorbed and buffered, preventing excessive force from impacting other components of the transmission mechanism.

[0039] It can be understood that the above design ensures that the rocker 2 can not only be accurately positioned during rotation, but also achieve buffer protection during rotation, avoiding damage caused by excessive impact. When the rocker 2 rotates relative to the transmission shaft 1, the movement of the rocker 2 and the action of the spring 3 are coordinated with each other. The pin column slides smoothly along the inclined plane of the V-shaped groove, and the spring 3 is gradually compressed and twisted, thereby providing a smooth double-buffer function. During the entire buffering process, the acting forces of the V-shaped groove and the spring 3 are gradually adjusted as the rotation angle of the rocker 2 changes, so that the transmission system can maintain a stable buffering force at various angles.

[0040] To ensure the adaptability of the transmission system under various working conditions, the initial compression amount of the spring 3 can be adjusted by adjusting the position of the spring fixing sleeve 5. By rotating the screw 6, the position of the spring fixing sleeve 5 on the transmission shaft 1 can be changed, thereby adjusting the pre-tightening force of the spring 3, and further affecting the buffering effect of the rocker 2. This design enables the transmission mechanism to be flexibly adjusted according to actual application requirements and adapt to the usage requirements under different loads and working conditions.

[0041] In practical applications, this transmission mechanism can be widely used in various mechanical systems that require precise positioning and buffering functions. For example, in the transmission mechanism of the parking lock rocker arm, industrial robotic arms, and automated control systems, etc. Through the double-buffer function of this transmission mechanism, the impact force during the movement process can be effectively reduced, ensuring the stable operation of the system. In addition, through the cooperation of the limiting component 4 and the V-shaped groove, this transmission mechanism also has a high-precision positioning function, ensuring the high-precision operation of the system.

[0042] In summary, this double-buffer rocker transmission mechanism with high-precision positioning realizes the precise positioning of the rocker 2 in the axial and circumferential directions through a clever structural design and the coordinated cooperation of each component. At the same time, through the double-buffer function of the V-shaped groove and the spring 3, the stability and reliability during the transmission process are ensured. Embodiment 2:

[0043] As Figure 4 shown, the difference between this embodiment and Embodiment 1 is that a bolt 8 is directly used on the transmission shaft 1 to replace the spring fixing sleeve 5 to realize the circumferential and axial constraints on one end of the spring 3.

[0044] Specifically, a bolt 8 for fixing one end of the spring 3 is installed on the transmission shaft 1. This bolt 8 is tightly connected to the end of the spring 3 and plays a dual constraint role: one is to constrain the circumferential movement of the spring 3 to prevent it from rotating around the transmission shaft 1; the other is to constrain the axial movement of the spring 3 to prevent it from sliding along the length direction of the transmission shaft 1.

[0045] Specifically, the bolt 8 may pass through the mounting holes at the ends of the spring 3, or cooperate with specific structures (such as hooks, grooves, etc.) at the ends of the spring 3. For example: as Figure 4 shown, one end of the spring 3 is machined into a hook shape to form a mounting hole. The bolt 8 directly passes through this mounting hole and is tightly connected to the end of the spring 3. Through this connection method, the bolt 8 not only firmly fixes the spring 3 on the transmission shaft 1, but also restrains the spring 3 in the circumferential and axial directions.

[0046] Through this connection method, one end of the spring 3 is firmly fixed on the transmission shaft 1, ensuring that the spring 3 can effectively transmit force and motion during transmission without affecting the normal operation of the device due to loosening or displacement.

[0047] Although the exemplary embodiments of the present disclosure have been described, those skilled in the art should understand that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence. Therefore, all changes and modifications are included within the protection scope of the present disclosure defined by the claims. The present disclosure is defined by the appended claims, and equivalents of these claims are also included.

Claims

1. A double-buffered rocker transmission mechanism for high-precision positioning, characterized in that The transmission mechanism comprises: a transmission shaft, a rocker arm rotatably mounted on the transmission shaft, and a spring mounted on the transmission shaft and matched with the rocker arm, wherein one end of the spring is fixed on the transmission shaft, thereby circumferentially constraining and axially limiting the end of the spring, and the other end of the spring is pressed against the rocker arm through elastic action, and the end forms a constrained connection with the rocker arm, thereby providing elastic support in the axial direction while limiting and positioning the rocker arm in the circumferential direction; a radially extending limiting component is provided on the transmission shaft, and correspondingly, a limiting groove matched with the limiting component is provided on the rocker arm, and under the axial thrust of the spring, the limiting groove of the rocker arm and the limiting component of the transmission shaft are detachably engaged, thereby axially and circumferentially constraining and positioning the movement of the rocker arm.

2. A double-buffered rocker transmission mechanism for high-precision positioning as described in claim 1, characterized in that: The transmission shaft is provided with an adjustable spring fixing sleeve to fix one end of the spring. The initial axial elastic force of the spring and the rocker arm can be adjusted by adjusting the position of the spring fixing sleeve.

3. A double-buffered rocker transmission mechanism for high-precision positioning as described in claim 2, characterized in that: The spring fixing sleeve is an annular structure, which is provided with a first hole parallel to the axis and a second hole perpendicular to the axis, wherein the first hole is used to be hooked and connected with one end of the spring, and the second hole has an internal tapped thread. The screw passes through the second hole and presses against the transmission shaft to fix the annular structure on the transmission shaft.

4. A double-buffered rocker transmission mechanism for high-precision positioning as described in claim 1, characterized in that: The limiting groove is a V-shaped groove, and the opening of the V-shaped groove is provided with an arc-shaped guiding transition surface.

5. A double-buffered rocker transmission mechanism for high-precision positioning as described in claim 1, characterized in that: The limiting component on the transmission shaft is a detachable pin, and correspondingly, a radial hole matching with the pin is provided on the transmission shaft.

6. A double-buffered rocker transmission mechanism for high-precision positioning as described in claim 1, characterized in that: The rocker comprises a ring sleeve with a limiting groove on the end face and a rocker arm connected to the ring sleeve; the rocker arm and / or the ring sleeve are in contact with the spring, and one end of the spring is connected to the rocker arm through a hook.

7. A double-buffered rocker transmission mechanism for high-precision positioning as described in claim 1, characterized in that: The transmission shaft is provided with a bolt for fixing one end of the spring, and the bolt is connected and matched with the end of the spring to constrain the spring in the circumferential and axial directions.

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