Rehabilitation pedal machine speed change gear box

Abstract

The utility model discloses a speed change gear box of a rehabilitation pedal machine, which comprises a gear box body, a gear box cover for sealing and covering one side of the gear box body is fixed on one side of the gear box body through a screw combination, and a plastic gear piece is arranged in an inner cavity of a combination gear of the gear box body and the gear box cover. The two ends of the gear shaft penetrate out of the tooth box body and one side of the outer portion of the tooth box cover to drive the rehabilitation pedal to work, the tooth box body and the tooth box cover are combined to form a gear cavity matched with the diameter size of the plastic gear piece, and the shaft sleeve part is arranged at the outer center position and enables the two ends of the gear shaft to penetrate out. The concentricity of the gear shaft is guaranteed through the shaft sleeve part, unstable rotation caused by eccentricity is avoided, extra noise and abrasion caused by unstable rotation are reduced, and the problem that a traditional gearbox cavity is large in space and unreasonable is solved through the design of the gearbox cavity. The waste that the internal space of the gearbox cavity is too open and needs to be filled with a large amount of lubricating grease is avoided, and optimized utilization of the space is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the related technical field of rehabilitation treadle machine, concretely relates to a rehabilitation treadle machine gear box. BACKGROUND

[0002] At present, the rehabilitation treadle machine gear box on the market mainly realizes by two or multi-stage speed change, the multi-stage transmission of gear can produce great noise, in addition, the unsteadiness of rotation caused by the increase of friction of multi-stage transmission, the fixing of gear box and motor of other rehabilitation treadle machines is two screws, the fixing position is too few and not firm, the motor can swing during use. And the existing gear box cavity design space is too large and not very reasonable, which can cause the inside space of gear box cavity to be too spacious and need to fill a large amount of lubricating grease, causing unnecessary waste. CONTENT OF UTILITY MODEL

[0003] The utility model aims at providing a rehabilitation treadle machine gear box to solve the problems in the above background.

[0004] In order to realize the above-mentioned purpose, the utility model provides the following technical scheme: a rehabilitation treadle machine gear box, comprising:

[0005] The gear box body is combined and fixed on one side of the gear box body through screws, and a gear box cover is combined and fixed on the other side of the gear box body, the gear box body and the gear box cover are combined to form a gear box, a plastic gear part is arranged in the combined gear cavity of the gear box body and the gear box cover, the plastic gear part is driven to work, a gear shaft is arranged in the plastic gear part, one end of the gear shaft is arranged outside the gear box body and the gear box cover, and the gear shaft drives the rehabilitation treadle to work, a DC motor is arranged on one side of the gear box, the DC motor provides driving force for the plastic gear part, a worm is arranged on the DC motor and is engaged with the upper end of the plastic gear part to drive the plastic gear part.

[0006] Preferably, a motor mounting portion is integrally formed on one side of the upper end of the gear box body, a worm cavity is arranged in the central position of the inner side of the motor mounting portion and penetrates the upper end of the inner cavity of the gear box body, when the vibration and torque generated during the operation of the motor are borne, the stress can be effectively dispersed, the local stress concentration is reduced, and the service life of the entire gear box is prolonged.

[0007] Preferably, one end of the rotating shaft of the DC motor is sealingly fixed on the motor mounting portion, and a double-end spiral worm connected in transmission is transmitted into the upper end of the inner cavity of the gear box through the worm cavity, during the transmission process through the worm cavity, the cooperation between the inner wall of the worm cavity and the worm is very close, the stability and accuracy of the worm during power transmission are ensured, the power transmission is more reliable, and a powerful guarantee is provided for the stable operation of the rehabilitation treadle.

[0008] Preferably, the inside of the combination of the gear box body and the gear box cover is formed with a gear cavity matching the diameter of the plastic gear part, and the outside center of the gear box body and the gear box cover is extended with a shaft sleeve part for the gear shaft to pass through, through the precise size design, the shaft sleeve part not only ensures the concentricity of the gear shaft during rotation, avoids the rotation instability caused by eccentricity, but also provides additional protection for the gear shaft to prevent damage caused by external factors.

[0009] Preferably, the plastic gear part is fixed at the center of the gear shaft, and the contact position of the two ends of the gear shaft and the shaft sleeve part is embedded with a bearing part, which ensures that the gear shaft will not move axially or radially during high-speed rotation, thereby ensuring the stable engagement and efficient transmission of the plastic gear part, further reducing the noise of the gear box and improving the overall transmission efficiency.

[0010] Preferably, the worm on the shaft of the DC motor is designed as a double helix structure, and the worm engages the plastic gear part to increase the transmission speed and drive the gear shaft to rotate. During the engagement of the worm and the plastic gear part, the double helix structure makes the contact between the worm and the plastic gear part more uniform and continuous, avoiding the impact and vibration caused by the intermittent contact point of the single-head worm during transmission.

[0011] Compared with the prior art, the technical effects and advantages of the present application are as follows: the variable speed gear box of the rehabilitation pedal machine forms a gear cavity matching the diameter of the plastic gear part by combining the gear box body and the gear box cover, and sets a shaft sleeve part at the outside center for the gear shaft to pass through. Through the precise size design, the shaft sleeve part ensures the concentricity of the gear shaft, avoids the rotation instability caused by eccentricity, reduces the additional noise and wear caused by rotation instability, and avoids the problem of large and unreasonable space of the traditional gear box cavity, avoids the waste of filling a large amount of lubricating oil in the large space of the gear box cavity, and realizes the optimized use of space.

[0012] The plastic gear part is fixed at the center of the gear shaft, and the contact position of the two ends of the gear shaft and the shaft sleeve part is embedded with a bearing part, which ensures that the gear shaft will not move axially or radially during high-speed rotation, thereby ensuring the stable engagement and efficient transmission of the plastic gear part, further reducing the noise of the gear box and improving the overall transmission efficiency.

[0013] The double helix worm is adopted, and the double helix structure makes the contact between the worm and the plastic gear part more uniform and continuous, avoiding the impact and vibration caused by the intermittent contact point of the single-head worm during transmission, effectively reducing the noise during transmission, and making the transmission more stable. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1The utility model discloses a first visual angle structure schematic diagram of rehabilitation foot tread machine gear box,

[0015] Fig. 2 The utility model discloses a second visual angle structure schematic diagram of rehabilitation foot tread machine gear box,

[0016] Fig. 3 It is the explosion structure schematic diagram of rehabilitation foot tread machine gear box.

[0017] In the figure: 1, tooth box body;2, tooth box cover;3, plastic gear part;4, gear shaft;5, direct current motor;6, worm;7, motor installation part;8, worm cavity;9, shaft sleeve part;10, bearing part. Specific implementation

[0018] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0019] Please refer to Figs. 1-3 The utility model provides a technical scheme: a rehabilitation foot tread machine gear box, comprising:

[0020] The tooth box body 1 provides the basic structure of installation and support for the internal gear transmission system and motor and other components. It provides accommodation and protection space for plastic gear part 3, gear shaft 4 and direct current motor 5 and the like, prevents the interference and damage of external environmental factors (such as dust, foreign matter and the like) to internal transmission components, ensures the stability and reliability of internal gear transmission. At the same time, its own structural strength and rigidity ensure that no excessive deformation occurs when various loads and stresses are borne, so that the shape and position stability of the whole gear box is maintained, the normal operation of the rehabilitation foot tread machine is ensured, one side of the tooth box body 1 is fixed with the tooth box cover 2 that seals one side of the tooth box body 1 by screw combination, the tooth box cover 2 is fixed on one side of the tooth box body 1 by screw combination, and the tooth box body 1 is sealed and covered. Its main role is to close one side of the tooth box body 1, form a relatively closed gear inner cavity, create a good working environment for internal plastic gear part 3 and other components. This helps to prevent the leakage of internal lubricating grease, maintains the lubrication state of gears and other components, and at the same time avoids the entry of dust, moisture and other impurities into the gear inner cavity, protects the internal components from external pollution, thereby prolonging the service life of the internal components.

[0021] The combined gear inner cavity of the gear box body 1 and the gear box cover 2 is provided with a plastic gear part 3 for driving the rehabilitation foot pedal machine to work. The plastic gear part 3 is a key component for driving the rehabilitation foot pedal machine to work, and it is in the combined gear inner cavity of the gear box body 1 and the gear box cover 2. Through meshing transmission with the worm 6 on the DC motor 5, the power of the DC motor 5 is transmitted to the gear shaft 4. The selection of plastic material has the advantages of light weight, moderate friction coefficient and low cost, and can realize relatively stable power transmission while meeting certain strength requirements. It plays a role in changing the speed and torque during the speed changing process. According to different gear tooth number ratio, different movement speed and torque output of the rehabilitation foot pedal machine can be realized to meet the rehabilitation training needs of different users.

[0022] The plastic gear part 3 is provided with a gear shaft 4 penetrating out of one side of the gear box body 1 and the gear box cover 2 to drive the rehabilitation foot pedal to work. The gear shaft 4 penetrates out of one side of the gear box body 1 and the gear box cover 2, and its main function is to transmit the rotary motion of the plastic gear part 3 to the rehabilitation foot pedal. It serves as a medium for power transmission, connects the internal gear transmission system with the external foot pedal, so that the power can be output from the gear box to drive the rehabilitation foot pedal to work. The reasonable length and diameter design ensures that it has enough strength and rigidity when transmitting power, avoiding deformation or breakage when transmitting large torque. One side of the gear box body 1 and the gear box cover 2 combined into a speed changing gear box is provided with a DC motor 5 for providing driving force for the plastic gear part 3. The DC motor 5 is the power source of the entire speed changing gear box, and provides driving force for the plastic gear part 3. Through its own electric energy conversion into mechanical energy, it drives the worm 6 to rotate, and then drives the entire gear transmission system to operate. The DC motor 5 has the characteristics of adjustable speed and torque, and can flexibly adjust the output power according to different rehabilitation training programs and user needs, providing stable and reliable power support for the rehabilitation foot pedal machine to meet the movement intensity requirements of different rehabilitation stages.

[0023] The DC motor 5 is provided with a worm 6 penetrating into the inner cavity of the gear box body 1 and the gear box cover 2 and meshing with the upper end of the plastic gear part 3 to drive. The worm 6 is a transmission component between the DC motor 5 and the plastic gear part 3, which converts the high-speed rotary motion of the DC motor 5 into a suitable transmission form for the plastic gear part 3. Its double-head spiral structure design brings many advantages: first, the double-head spiral structure can increase the contact frequency with the plastic gear part 3, making the power transmission more stable and continuous, avoiding the impact and vibration that may occur in the transmission process of single-head spiral structure due to less contact points, and reducing the transmission noise; second, by changing the spiral angle and number of heads of the worm 6, different transmission ratios can be realized to realize the speed changing function, provide different movement speed and torque output for the rehabilitation foot pedal machine, and meet the needs of different rehabilitation training.

[0024] The upper end of the tooth box body 1 is integrally formed with a motor mounting portion 7 on one side, which provides a special mounting position for the DC motor 5. The integrally formed design enhances the structural strength and avoids loosening or damage of the mounting portion due to vibration and torque effect during motor operation. At the same time, as the installation basis of the DC motor 5, it ensures the position accuracy of the motor, so that the relative position between the DC motor 5 and the tooth box body 1 and the internal transmission components remains stable. The inside center of the motor mounting portion 7 is provided with a worm cavity 8 penetrating into the upper end of the internal cavity of the tooth box body 1, which provides an accurate installation and movement channel for the worm 6, ensuring the worm 6 to maintain straight line motion during power transmission, and ensuring the concentricity and position accuracy of the worm 6. The closely matched inner wall of the worm cavity 8 and the worm 6 can reduce the swing and shaking of the worm 6 during transmission, reduce the additional friction and wear caused by the position deviation of the worm 6, and ensure the stability and accuracy of power transmission, while reducing the noise during transmission.

[0025] The rotating shaft of the DC motor 5 is sealed and fixed on the motor mounting portion 7, and the transmission connected double-head spiral worm 6 is transmitted into the upper end of the internal cavity of the tooth box body 1 through the worm cavity 8. The internal cavity of the combination of the tooth box body 1 and the tooth box cover 2 is formed with a gear cavity with a diameter size matching the plastic gear 3. The external center positions of the tooth box body 1 and the tooth box cover 2 are both outwardly extended with a shaft sleeve portion 9 for the gear shaft 4 to pass out of both ends. The shaft sleeve portion 9 outwardly extended and arranged at the external center positions of the tooth box body 1 and the tooth box cover 2 provides positioning and support for the gear shaft 4 to pass out of both ends. It ensures the concentricity of the gear shaft 4 during rotation, prevents eccentricity of the gear shaft 4, avoids unstable rotation and additional radial force caused by eccentricity, thereby reducing the wear and vibration of the gear shaft 4 and its connected components. In addition, the shaft sleeve portion 9 also provides external protection for the gear shaft 4, preventing damage to the gear shaft 4 from the external environment, and ensuring the long-term stable operation of the gear shaft 4.

[0026] The plastic gear 3 is fixed at the center position of the gear shaft 4, and the bearing 10 is embedded in the contact position of the gear shaft 4 at both ends with the shaft sleeve portion 9. The bearing 10 is embedded in the contact position of the gear shaft 4 at both ends with the shaft sleeve portion 9, mainly to reduce the friction of the gear shaft 4 during rotation. It can make the gear shaft 4 rotate smoothly at high speed, reduce the energy loss caused by friction, and improve the transmission efficiency. At the same time, the bearing 10 can bear the radial and axial load transmitted by the gear shaft 4, effectively dispersing the load, avoiding wear and damage caused by the load concentrated at the direct contact position of the gear shaft 4 and the shaft sleeve portion 9, prolonging the service life of the gear shaft 4 and the shaft sleeve portion 9. The worm 6 on the rotating shaft of the DC motor 5 is designed as a double-head spiral structure, and the worm 6 is engaged on the plastic gear 3 to increase the transmission and variable speed drive of the gear shaft 4.

[0027] Specifically, during use, the operation of the rehabilitation pedal machine's gearbox begins with the DC motor 5. As a power source, the DC motor 5 converts electrical energy into mechanical energy, driving the connected double-headed helical worm gear 6 to rotate. The motor mounting part 7 is integrally formed on one side of the upper end of the gearbox body 1, providing a stable mounting position for the DC motor 5 and ensuring its stability and positional accuracy during operation. The worm gear 6, through the worm cavity 8 inside the motor mounting part 7, precisely transmits power to the upper end of the inner cavity of the gearbox body 1. The worm cavity 8 ensures the linear motion and concentricity of the worm gear 6, reducing oscillation and wear, and ensuring stable and precise power transmission. The worm gear 6 meshes with the plastic gear component 3; its double-headed helical structure increases the contact frequency, making power transmission smooth, reducing noise, and achieving speed change by altering the helix angle and number of heads. The plastic gear component 3 is fixed at the center of the gear shaft 4 and rotates under the drive of the worm, transmitting power to the gear shaft 4, realizing the conversion from high-speed rotation of the motor to a transmission form suitable for the rehabilitation pedal machine.

[0028] The gear shaft 4 extends through the gearbox body 1 and gearbox cover 2 at both ends, and is positioned and supported by the bushing part 9 to ensure concentricity of rotation and avoid adverse effects caused by eccentricity. The bushing part 9 also protects the gear shaft 4 from external damage. As the power transmission medium, the gear shaft 4 transmits the power output of the internal gear transmission system to drive the rehabilitation foot pedal. Its reasonable design ensures that it will not deform or break when transmitting large torques. The gearbox body 1 and gearbox cover 2 form a relatively enclosed space, protecting the internal transmission components and preventing lubricant leakage and impurities from entering. The bearing 10 at the contact point between the gear shaft 4 and the bushing part 9 reduces rotational friction of the gear shaft 4, improves transmission efficiency, bears and distributes radial and axial loads, and extends the service life of the gear shaft 4 and the bushing part 9. The close cooperation of all components enables the rehabilitation foot pedal machine's gearbox to achieve stable and efficient power output, meeting the different needs of rehabilitation training.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A speed-changing gearbox for a rehabilitation pedal machine, characterized in that, include: The dental box (1) has a dental box cover (2) that is fixed to one side of the dental box (1) by screws. The dental box (1) and the dental box cover (2) are equipped with a plastic gear (3) that drives the rehabilitation pedal machine. The plastic gear (3) is equipped with a gear shaft (4) that drives the rehabilitation pedal machine by having both ends protrude from the outside of the dental box (1) and the dental box cover (2). The dental box (1) and the dental box cover (2) are equipped with a DC motor (5) that provides driving force to the plastic gear (3). The DC motor (5) is equipped with a worm gear (6) that passes through the dental box (1) and the dental box cover (2) and meshes with the upper end of the plastic gear (3).

2. The speed-changing gearbox for a rehabilitation pedal machine according to claim 1, characterized in that: The upper side of the dental box (1) is integrally formed with a motor mounting part (7), and the center of the inner side of the motor mounting part (7) is provided with a worm gear cavity (8) that extends to the upper end of the internal cavity of the dental box (1).

3. The speed-changing gearbox for a rehabilitation pedal machine according to claim 1, characterized in that: One end of the shaft of the DC motor (5) is sealed and fixed on the motor mounting part (7), and the double-headed spiral worm (6) connected to the transmission is transmitted to the upper end of the inner cavity of the gear box (1) through the worm cavity (8).

4. The speed-changing gearbox for a rehabilitation pedal machine according to claim 1, characterized in that: The combined gearbox body (1) and gearbox cover (2) form a gear cavity that is adapted to the diameter of the plastic gear component (3). The gearbox body (1) and gearbox cover (2) are provided with bushings (9) extending outward from the center of the outer side so that the two ends of the gear shaft (4) can pass through.

5. The speed-changing gearbox for a rehabilitation pedal machine according to claim 4, characterized in that: The plastic gear component (3) is fixed at the center of the gear shaft (4), and bearing components (10) are sleeved and embedded at the contact positions between the two ends of the gear shaft (4) and the bushing (9).

6. The speed-changing gearbox for a rehabilitation pedal machine according to claim 1, characterized in that: The worm (6) on the shaft of the DC motor (5) is a double-headed helical structure design, and the worm (6) meshes with the plastic gear (3) to increase the transmission speed and drive the gear shaft (4) to rotate.

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