A circumferential rotating spline energy storage device

Abstract

The utility model relates to a kind of circumferential rotation spline energy storage device, belong to transmission mechanism technical field, solve the problem of the unstable problem of the sustained pressure effect of the transmission mechanism to target object in prior art.The spline shaft section is provided on the transmission spline shaft, spline groove is provided on the output swing arm, spline shaft section is inserted into the spline groove;The side end face of the key tooth structure of the spline shaft section is in contact with the side end face of the keyway structure of the spline groove under the elastic force of torsion spring, and another side end face and the other side end face of keyway structure leave rotating clearance;When output swing arm rotates to the contact position with the object, transmission spline shaft can continue to rotate the angle corresponding to rotating clearance, while compressing torsion spring.The utility model realizes the elastic energy storage to spline structure by torsion spring, and then output swing arm can exert sustained force to terminal object.

Description

Technical Field

[0001] This utility model relates to the field of transmission mechanism technology, and in particular to a circumferential rotating spline energy storage device. Background Technology

[0002] Currently, linear output mechanisms that require rotary drive generally have complex structures, such as gear and rack mechanisms, worm gear mechanisms, or lead screw and nut mechanisms, which are not only costly to manufacture but also difficult to maintain. For transmission devices that need to achieve a compact layout in a limited space, traditional structures often struggle to balance efficient transmission and mechanical energy storage.

[0003] For working conditions that require triggering pressing or clamping actions, existing devices mostly rely on external power sources to achieve clamping, which has low reliability and cannot achieve continuous pressure application in a power-off state.

[0004] Therefore, there is a need to provide a rotary energy storage device that can integrate transmission and energy storage functions. Utility Model Content

[0005] Based on the above analysis, the present invention aims to provide a circumferential rotating spline energy storage device to solve the problem of unstable continuous pressure applied to the target object by existing transmission mechanisms.

[0006] The objective of this utility model is mainly achieved through the following technical solutions:

[0007] A circular rotating spline energy storage device includes: a drive spline shaft, a torsion spring sleeved on the drive spline shaft, and an output rotating arm; the drive spline shaft is provided with a spline shaft section, and the output rotating arm is provided with a spline groove, the spline shaft section being inserted into the spline groove; one end face of the key tooth structure of the spline shaft section is pressed into contact with one end face of the keyway structure of the spline groove under the elastic force of the torsion spring, and a rotational clearance is left between the other end face of the key tooth structure of the spline shaft section and the other end face of the keyway structure of the spline groove; when the output rotating arm rotates to the position of contacting the object being acted upon, the drive spline shaft can continue to rotate by an angle corresponding to the rotational clearance while compressing the torsion spring.

[0008] Furthermore, the transmission spline shaft is fixedly connected to the output end of the motor.

[0009] Furthermore, the central angle corresponding to the rotation gap is less than the maximum torsional deformation of the torsion spring.

[0010] Furthermore, a torsion spring locating pin is provided on the transmission spline shaft.

[0011] Furthermore, the first end of the torsion spring is arc-shaped and is attached to the torsion spring positioning pin.

[0012] Furthermore, a torsion spring limiting groove is provided on the output rotating arm.

[0013] Furthermore, the second end of the torsion spring is placed in the torsion spring limiting groove.

[0014] Furthermore, the rotation gap is an arc-shaped groove segment.

[0015] Furthermore, the central angle of the rotation gap ranges from 3° to 8°.

[0016] Furthermore, an execution end is provided at the end of the output rotating arm.

[0017] The technical solution of this utility model can achieve at least one of the following effects:

[0018] 1. The circular rotating spline energy storage device of this utility model uses a transmission spline shaft as the power input end part. Its main function is to transmit the rotational torque and speed output by the motor and other prime movers to the output arm, thereby realizing the transmission of torque and speed, and thus realizing the rotational motion of the output arm. The output arm acts as the power output end. Under the drive of the transmission spline shaft, it rotates until the action is in place. After that, it can continuously act on the target object (press / press) through the execution end at its end. The action has high reliability.

[0019] 2. The fundamental difference between the circumferential rotating spline energy storage device of this utility model and the traditional spline transmission is that in the traditional spline transmission, the output arm and the spline shaft slide along the axial direction, while in the spline transmission of this utility model, the output arm and the spline shaft can achieve synchronous torque transmission when the torsion spring does not deform. When the torsion spring is compressed, they can rotate and slide along the circumferential direction. The mechanical elastic energy is stored through the torsion spring, thereby providing a certain degree of clamping force to the end of the output arm.

[0020] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages will become apparent from the description or be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained from the description and accompanying drawings, which are particularly pointed out. Attached Figure Description

[0021] The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0022] Figure 1 This is a schematic diagram of the structural composition of the circumferential rotating spline energy storage device of this utility model;

[0023] Figure 2 This is a cross-sectional view of the circumferential rotating spline energy storage device of this utility model;

[0024] Figure 3 This is a partially enlarged view of the rotation gap of the circumferential rotating spline energy storage device of this utility model.

[0025] Figure label:

[0026] 1-Transmission spline shaft; 2-Torsion spring; 3-Torsion spring locating pin; 4-Output swing arm; 5-Torsion spring locating groove; 6-Spline shaft section; 7-Spline groove; 8-Actuating end; f-Load resistance. Detailed Implementation

[0027] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0028] Example 1

[0029] A specific embodiment of this utility model discloses a circumferential rotating spline energy storage device, such as... Figure 1 As shown, it includes: a transmission spline shaft 1, a torsion spring 2, and an output rotating arm 4; the torsion spring 2 is provided between the transmission spline shaft 1 and the output rotating arm 4; the transmission spline shaft 1 is provided with a spline shaft section 6, and the output rotating arm 4 is provided with a spline groove 7. After the spline groove 7 of the output rotating arm 4 and the spline shaft section 6 are engaged, a rotational clearance is left in the rotational direction; the rotational clearance is used to realize the relative rotation of the output rotating arm 4 and the transmission spline shaft 1, and at the same time, it can accumulate mechanical energy through the torsion spring 2.

[0030] Specifically, such as Figure 1 , Figure 2 As shown, one end face of the key tooth structure of the spline shaft segment 6 is pressed into contact with one end face of the keyway structure of the spline groove 7 under the elastic force of the torsion spring, and a rotational gap is left between the other end face of the key tooth structure of the spline shaft segment 6 and the other end face of the keyway structure of the spline groove 7; when the output arm 4 rotates to the position of contact with the object being acted upon, the transmission spline shaft 1 can continue to rotate at the angle corresponding to the rotational gap, while compressing the torsion spring 2. The central angle corresponding to the rotational gap is less than the maximum torsional deformation of the torsion spring 2, so that the elastic force of the torsion spring 2 can compress the transmission spline shaft 1 and the output arm 4 into a whole and rotate synchronously.

[0031] In this embodiment, after the output arm 4 stops rotating, the transmission spline shaft 1 continues to rotate at the angle corresponding to the rotation gap, overcoming the elastic resistance of the torsion spring 2; at the same time, the torsion spring 2 is further compressed. While the transmission spline shaft 1 rotates and eliminates the circumferential rotation gap, it can accumulate torque kinetic energy through the torsion spring 2, thereby realizing the transmission and conversion of mechanical energy.

[0032] Furthermore, such as Figure 1 As shown, a torsion spring locating pin 3 is provided on the transmission spline shaft 1. Specifically, the torsion spring locating pin 3 is used to fix one end of the torsion spring 2 to the transmission spline shaft 1 and to transmit the torsional force and speed of the transmission spline shaft 1 to the torsion spring 2. Specifically, the first end of the torsion spring 2 is arc-shaped or annular and is hung on the torsion spring locating pin 3.

[0033] Specifically, one end of the torsion spring 2 is limited by the torsion spring positioning pin 3; the output rotating arm 4 is provided with a torsion spring limiting groove 5; the other end of the torsion spring 2 is inserted into the torsion spring limiting groove 5 and is limited by the torsion spring limiting groove 5.

[0034] like Figure 1 As shown, the torsion spring 2 is mounted on the transmission spline shaft 1. One end of the torsion spring 2 is fixed to the torsion spring positioning pin 3 on the transmission spline shaft 1, and the other end is pressed into the torsion spring positioning groove 5 of the output rotating arm 4. Specifically, there is a rotational clearance 'a' between the spline shaft section 6 on the transmission spline shaft 1 and the spline groove 7 on the output rotating arm 4 in the rotational direction, as shown in the figure. Figure 2 , Figure 3 As shown. An execution end 8 is provided at the end of the output rotating arm 4; used to realize the continuous force exerted by the output rotating arm 4 on the object being acted upon. Preferably, a clamping groove is provided below the execution end 8, and the shape of the clamping groove is adapted to the shape of the object being acted upon. Since the elastic force of the torsion spring 2 is positively correlated with its deformation, and the deformation of the torsion spring 2 is within a controllable range, the circumferential rotating spline energy storage device of this utility model can control the range of clamping force by reasonably selecting the torsion spring 2 and setting the rotation gap.

[0035] In this embodiment, the torsion spring 2 accumulates and releases torque through its own torsional elastic deformation; when the output arm 4 stops moving due to restriction, the torque transmitted by the transmission spline shaft 1 drives the torsion spring 2 to undergo torsional deformation, and the torsion spring 2 can accumulate mechanical energy; the rotation gap is an arc-shaped groove segment; the central angle corresponding to the rotation gap is α; the value range of the central angle α of the rotation gap is 3° to 8°.

[0036] In this embodiment, the output arm 4 serves as the output end of the circumferential rotating spline energy storage device. Its main function is to convert the torque transmitted directly from the transmission spline shaft 1 or via the torsion spring 2 into a tangential linear force through the end actuator 8, and then transmit it to the target, such as... Figure 2 As shown.

[0037] In practice, the transmission spline shaft 1 is driven to rotate by a motor. The output end of the motor is connected to the transmission spline shaft 1 and drives it to rotate. When the motor drives the transmission spline shaft 1 to rotate, the output arm 4 rotates synchronously with the spline shaft section 6 and the spline groove 7, thus driving the output arm 4 to rotate. When the output arm 4 stops rotating due to external resistance, the transmission spline shaft 1 continues to rotate by a small angle less than or equal to the central angle corresponding to the rotation gap under the continuous drive of the motor. At this time, the torsion spring 2 is gradually twisted and compressed due to the relative rotation between the transmission spline shaft 1 and the output arm 4, accumulating elastic potential energy. The elastic potential energy of the torsion spring 2 can apply a continuous torque force to the output arm 4, so that the output arm 4 can still maintain a certain degree of force on the target after the transmission spline shaft 1 stops moving.

[0038] The purpose of this utility model's circumferential rotating spline energy storage device is to provide mechanical energy storage to the end-effector (the pressing plate of the output arm 4) by eliminating rotational transmission backlash. This ensures that the position and force application of the end-effector 8 are maintained after the power source stops outputting power, preventing insufficient force and position loss due to vibration or other reasons. When the target component at the output end (output arm 4) becomes loose or has gaps, the output arm 4 eliminates the gaps and applies continuous force under the accumulated torque of the torsion spring 2. For example, when the power device is driven by a motor, if a holding force is still required after the motor is powered off or loses continuous torque output, the torsion spring 2 can effectively provide the holding force, ensuring the effective operation of the actuator. For example, the torsion spring 2 provides the clamping force when continuous clamping of the sealing rubber ring is required.

[0039] This invention achieves the storage and output of torque during rotary transmission by setting a torsion spring 2 and an output rotating arm 4 on the transmission spline shaft 1, and by utilizing the rotational clearance between the paired splines of the transmission spline shaft 1 and the output rotating arm 4. This enables a continuous torque output to the end load even after the drive source, such as a motor, stops outputting power, thus maintaining the continuous normal operation of the end target (such as a sealing rubber ring, switch button, friction plate, etc.). At the same time, it eliminates the adverse effects on the transmission mechanism caused by vibration and other factors, including the appearance of gaps and looseness.

[0040] In other words, when the transmission spline shaft 1 drives the output arm 4 to rotate to a predetermined position, the output arm 4 is subjected to the load resistance f, and at the same time, the output arm 4 exerts an equal reaction force on the load, and the mechanism reaches a balanced state and stops. At this time, the drive motor overcomes the torsional resistance of the torsion spring 2 and continues to drive the transmission spline shaft 1 to rotate until the rotational clearance a is eliminated. During the process of eliminating the rotational clearance a, the two ends of the torsion spring 2 undergo relative torsional displacement, thereby accumulating mechanical energy on the torsion spring 2, namely torque potential energy / elastic potential energy; the elastic force of the torsion spring 2 is continuously applied to the output arm 4 to provide the holding force required by the end load; at the same time, it can eliminate the gap in the transmission mechanism caused by the loosening of the locking of the transmission spline shaft 1 and the problem of unstable contact between the output arm 4 and the end load caused by vibration and other reasons.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A circular rotating spline energy storage device, characterized in that, include: A transmission spline shaft (1) and a torsion spring (2) and an output rotating arm (4) sleeved on the transmission spline shaft (1); a spline shaft section (6) is provided on the transmission spline shaft (1), and a spline groove (7) is provided on the output rotating arm (4). The spline shaft section (6) is inserted into the spline groove (7). One end face of the key tooth structure of the spline shaft section (6) is pressed and contacted with one end face of the key groove structure of the spline groove (7) under the elastic force of the torsion spring (2), and a rotation gap is left between the other end face of the key tooth structure of the spline shaft section (6) and the other end face of the key groove structure of the spline groove (7). When the output rotating arm (4) rotates to the position of contact with the object being acted upon, the transmission spline shaft (1) can continue to rotate at the angle corresponding to the rotation gap, while compressing the torsion spring (2).

2. The circumferential rotating spline energy storage device according to claim 1, characterized in that, The transmission spline shaft (1) is fixedly connected to the output end of the motor.

3. The circumferential rotating spline energy storage device according to claim 1, characterized in that, The central angle corresponding to the rotation gap is less than the maximum torsional deformation of the torsion spring (2).

4. The circumferential rotating spline energy storage device according to any one of claims 1-3, characterized in that, A torsion spring positioning pin (3) is provided on the transmission spline shaft (1).

5. The circumferential rotating spline energy storage device according to claim 4, characterized in that, The first end of the torsion spring (2) is arc-shaped and is hung on the torsion spring positioning pin (3).

6. The circumferential rotating spline energy storage device according to claim 1, characterized in that, The output rotating arm (4) is provided with a torsion spring limiting groove (5).

7. The circumferential rotating spline energy storage device according to claim 6, characterized in that, The second end of the torsion spring (2) is placed in the torsion spring limiting groove (5).

8. The circumferential rotating spline energy storage device according to claim 1, characterized in that, The central angle of the rotation gap ranges from 3° to 8°.

9. The circumferential rotating spline energy storage device according to claim 1, characterized in that, The output rotating arm (4) is equipped with an execution end (8).

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