CN112483620A - Speed regulator and speed regulating device - Google Patents

Abstract

The invention relates to the technical field of vehicle speed regulation, in particular to a speed regulator and a speed regulation device. The speed regulator includes a rotating wheel set, and the rotating wheel set includes a fixed wheel fixed to a main shaft and a free wheel along the axial direction of the main shaft. A sliding moving wheel, the moving wheel and the fixed wheel constitute a combined wheel set with adjustable walking distance, and the governor also includes a movable plate connected with the movable wheel and a drive module that drives the movable plate to move in the axial direction , the driving module drives the moving wheel to move in the axial direction by means of the movable plate to adjust the walking distance. The speed regulator and the speed control device provided by the invention can realize the active control of the transmission ratio, the speed control is accurate and reliable, and the speed control efficiency is high, and the electric energy consumption can be effectively saved.

Description

A speed governor and a speed regulating device

technical field

The invention relates to the technical field of vehicle speed regulation, in particular to a speed regulator and a speed regulation device.

Background technique

In the prior art, as shown in Fig. 1, the electric vehicle generally connects the power output main shaft 11' of the vehicle drive motor to the driven shaft 21', which is the central axis of the wheel, through a speed control device. The speed regulating device includes a driving wheel set 1', a driven wheel set 2' and a belt 3'. As shown in FIG. 2, the driving wheel set 1' includes a fixed wheel 12' and a driving wheel 13' sleeved on the main shaft 11' of the driving motor. A belt 3' can be embedded in the back of the fixed pulley 12' and the moving pulley 13' facing each other. The fixed pulley 12' is fixed at the end of the main shaft 11', and the moving pulley 13' can make a small amount of displacement along the axis of the main shaft 11'. As shown in FIG. 3 , the driven wheel set 2 ′ includes a first slave side wheel 22 ′ and a second slave side wheel 23 ′, which are sleeved on the driven shaft 21 ′ of the wheel, and the first slave side wheel 22 ′ and the second slave side wheel 22 ′. The belt 3' can be embedded in the back of the side pulley 23'. The first slave side pulley 22' is fixed in the middle of the driven shaft 21', and the second slave side pulley 23' can be along the axis of the driven shaft 21'. Do axial movement, and one side of the second slave side pulley 23' is provided with a spring 24' that provides axial pressure.

As shown in Fig. 2, a plurality of raceways 132' are arranged in the concave disc 131' on the back of the driving wheel 13' in the driving wheel set 1'. On its circumference, a plurality of centrifugal rollers 133' are respectively installed in each raceway 132' and pressed by a chuck 134'. When the main shaft 11' of the driving motor rotates, the centrifugal roller 133' is subjected to centrifugal force. As the rotational speed increases, the centrifugal force increases. Under the action of the centrifugal force, the centrifugal roller 133' moves outward along the raceway 132' on the driving wheel 13'. Fly away, since the chuck 134' is fixed on the main shaft 11', it and the slope of the inner raceway 132' of the driving wheel 13' work together, the centrifugal roller 133' pushes the driving wheel 13' and pushes the belt 3' Extruded outward, and since the center distance between the driving wheel set 1' and the driven wheel set 2' remains unchanged, the second secondary side wheel 23' of the driven wheel set 2' is forced to move outwardly by the compression spring 24', so that the first The interval between the slave side pulley 22' and the second slave side pulley 23' is increased, and the working diameter of the driven pulley 2' is reduced, so that the working diameter of the driving pulley 1' gradually increases, and the working diameter of the driven pulley 2' It gradually becomes smaller, so that the transmission ratio gradually becomes smaller, and the continuously variable transmission from low speed to high speed is realized. Conversely, when the rotational speed of the driving motor decreases, the centrifugal force received by the centrifugal roller 133' decreases, and the axial thrust of the driving wheel 13' also decreases, the driving wheel 13' moves in the opposite direction, and the working diameter of the driving wheel group 1' decreases. At this time, the second slave side pulley 23' moves inward under the action of the spring 24', and the belt 3' is extruded outward, so that the working diameter of the driven pulley group 2' is increased, and the transmission ratio is gradually increased. Continuously variable transmission from high speed to low speed.

However, the speed regulating device in the above-mentioned prior art belongs to passive speed regulation, and the change of the transmission ratio depends on the rotational speed of the main shaft 11', and cannot realize the active speed regulation with adjustable and controllable transmission ratio.

SUMMARY OF THE INVENTION

In order to solve the technical problem that the speed control device in the prior art belongs to passive speed control and cannot actively control the transmission ratio, the present invention proposes a speed control device and a speed control device, which can realize the active control of the transmission ratio, and the speed control is accurate. reliable.

Technical scheme of the present invention:

A speed governor includes a rotating wheel set, the rotating wheel set includes a fixed wheel fixed to the main shaft and a movable wheel that freely slides along the axial direction of the main shaft, the movable wheel and the fixed wheel form a combined wheel set with adjustable walking distance , the governor includes a movable plate connected with the moving wheel and a drive module that drives the movable plate to move in the axial direction, and the drive module drives the movable wheel to move in the axial direction by means of the movable plate to adjust walking distance.

Further, the moving wheel is mounted on the main shaft by means of a spline structure, and the moving wheel rotates with the main shaft while being able to slide freely along the axial direction of the main shaft.

Further, the moving wheel is connected with the movable plate through a rotating body, and the rotating body includes a first rotating part fixedly connected with the moving wheel and a second rotating part fixedly connected with the moving plate, the first rotating part and rotate relative to the second rotating part.

Further, the drive module includes:

A drive plate, the drive plate is sleeved on the shaft sleeve of the main shaft and is threadedly matched with the shaft sleeve, the main shaft and the shaft sleeve are rotated and assembled, the drive plate is fixedly connected to the movable plate through a connecting piece, and the connection The parts can move in the axial direction but are restricted from rotation;

A driving module, which is used for driving the shaft sleeve to rotate, so that the driving plate drives the movable plate to move in the axial direction.

Further, the drive module drives the shaft sleeve to rotate by means of a worm gear set, the worm gear set includes a worm driven by the drive module and a worm wheel fixedly connected with the shaft sleeve, and the drive module sequentially passes through the worm screw and the worm wheel. The bushing is driven to rotate.

Further, the speed governor further includes a housing for accommodating the drive plate and a connecting piece, the connecting piece being a cylinder penetrating through the housing, and the cylinder can slide relative to the housing.

Further, there are a plurality of the cylinders, a plurality of through holes are formed in the housing, and the cylinders are assembled to the through holes by means of linear bearings.

Another aspect of the present invention provides a speed control device, comprising:

The rotating wheel set according to any one of the above, wherein the rotating wheel set is configured as a driving wheel set, and the driving wheel set drives the driven wheel set through a transmission belt;

The driven wheel set is also a combined wheel set with adjustable walking distance.

Further, the driven wheel set includes a first slave side wheel and a second slave side wheel, the first slave side wheel is fixed on the driven shaft, and the second slave side wheel is slidably installed on the driven shaft The upper side can rotate with the driven shaft at the same time, and one side of the second slave side wheel is provided with an elastic member that provides the second slave side wheel with an axial pressure toward the first slave side wheel.

Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

(1) In the speed governor of the present invention, centrifugal rollers and raceways are no longer arranged in the moving wheel, and the walking distance between the moving wheel and the fixed wheel is controlled by the cooperation of the movable plate and the drive module, so that the passive speed control is transformed into In order to actively adjust the speed, the transmission ratio can be adjusted according to the needs at any time, making the speed adjustment more flexible and reliable;

(2) The speed regulating device of the present invention does not depend on the centrifugal roller and raceway structure in the moving wheel, and can change the transmission ratio faster, with high speed regulation efficiency, faster acceleration or deceleration of the vehicle and more power saving;

(3) In the present invention, by setting the spline structure, not only the moving wheel can follow the rotation of the main shaft while sliding along the axial direction of the main shaft, but also the centering accuracy of the main shaft and the moving wheel is high, and large torque can be transmitted;

(4) The present invention transmits the shaft sleeve through the worm gear group, so that the transmission is more accurate and stable, so that the speed regulation of the governor is more stable and accurate.

Description of drawings

Fig. 1 is the structural representation of the speed regulating device in the prior art;

Fig. 2 is the structural representation of the driving wheel set in the prior art;

Fig. 3 is the structural representation of the driven wheel set in the prior art;

4 is a schematic structural diagram of the governor according to the first embodiment of the present invention;

5 is an exploded schematic diagram of the rotating wheel set according to the first embodiment of the present invention;

6 is a schematic cross-sectional view of the governor (without a housing) according to Embodiment 1 of the present invention;

7 is a schematic cross-sectional view of the governor (with a housing) according to the first embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a through hole on the casing according to Embodiment 1 of the present invention;

9 is a schematic diagram of the internal structure of the speed regulating device according to the second embodiment of the present invention;

10 is a schematic structural diagram of the speed regulating device according to the second embodiment of the present invention from a first viewing angle;

11 is a schematic structural diagram of the speed regulating device according to the second embodiment of the present invention from a second viewing angle;

FIG. 12 is a schematic structural diagram of a driven wheel set according to Embodiment 2 of the present invention.

in,

Driving wheel set 1', main shaft 11', fixed wheel 12', driving wheel 13', concave disc 131', raceway 132', centrifugal roller 133', chuck 134', driven wheel set 2', driven shaft 21 ', the first slave side wheel 22', the second slave side wheel 23', the spring 24', the belt 3';

Rotating wheel set 1, main shaft 11, external spline 111, bushing 112, bushing seat 113, fixed wheel 12, moving wheel 13, movable plate 14, rotating body 15, first rotating part 151, second rotating part 152, drive Module 16, Drive Module 161, Worm 1611, Worm Gear 1612, Intermediate Idler 1613, Drive Plate 162, Connector 163, Contact Bearing 1631, Housing 17, Through Hole 171, Linear Bearing 172, Swivel Bearing 173, Seal 174 ;

Driven wheel set 2, driven shaft 21, first slave side wheel 22, second slave side wheel 23, sliding sleeve 231, elastic member 24, transmission assembly 25, central shaft 26, limit plate 27;

Drive belt 3.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that There are features, steps, operations, devices, components and/or combinations thereof.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the invention unless specifically stated otherwise. Meanwhile, it should be understood that, for the convenience of description, the dimensions of various parts shown in the accompanying drawings are not drawn in an actual proportional relationship. Techniques, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the authorized description. In all examples shown and discussed herein, any specific value should be construed as illustrative only and not as limiting. Accordingly, other examples of exemplary embodiments may have different values. It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further discussion in subsequent figures.

In the description of the present invention, it should be understood that the orientations indicated by orientation words such as "front, rear, top, bottom, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. Or the positional relationship is usually based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and these orientation words do not indicate or imply the indicated device or element unless otherwise stated. It must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be construed as a limitation on the protection scope of the present invention; the orientation words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

For ease of description, spatially relative terms, such as "on", "over", "on the surface", "above", etc., may be used herein to describe what is shown in the figures. The spatial positional relationship of one device or feature shown to other devices or features. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or features would then be oriented "below" or "over" the other devices or features under other devices or constructions". Thus, the exemplary term "above" can encompass both an orientation of "above" and "below." The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.

In addition, it should be noted that the use of words such as "first" and "second" to define components is only for the convenience of distinguishing corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood to limit the scope of protection of the present invention.

Example 1:

This embodiment provides a speed governor. As shown in FIG. 4 , the speed governor includes a rotating wheel set 1 , and the rotating wheel set 1 includes a fixed wheel 12 fixed to the main shaft 11 and a movable wheel that can freely slide along the axial direction of the main shaft 11 . 13. The movable wheel 13 and the fixed wheel 12 constitute a combined wheel set with adjustable walking distance. The governor also includes a movable plate 14 connected with the movable wheel 13 and a drive module 16 that drives the movable plate 14 to move axially along the main shaft 11, The driving module 16 drives the moving wheel 13 to move in the axial direction by means of the movable plate 14 to adjust the running distance. Specifically, as shown in FIG. 4 , the main shaft 11 is an output shaft connected to the output end of the vehicle drive motor, the fixed wheel 12 and the moving wheel 13 are sleeved on the main shaft 11 , wherein the fixed wheel 12 is fixed on the end of the output shaft part, can follow the main shaft 11 to rotate, the moving wheel 13 is arranged on one side of the fixed wheel 12, can follow the main shaft 11 to rotate, and can slide freely along the axis of the main shaft 11, when the moving wheel 13 slides, between the fixed wheel 12 and the moving wheel 13 The walking distance changes. Further, a movable plate 14 and a driving module 16 are arranged on one side of the moving wheel 13 in sequence, and the driving module 16 drives the moving wheel 13 to move in the axial direction by means of the movable plate 14 to adjust the running distance.

In this way, when the governor of this embodiment is applied to the prior art, if the rotating wheel set 1 of this embodiment is configured as the driving wheel set in FIG. 2 , the rotating wheel 13 is no longer provided with centrifugal rollers and Raceway, the walking distance between the moving wheel 13 and the fixed wheel 12 is controlled by the movable plate 14 and the driving module 16, so that the passive speed regulation is converted into an active speed regulation. The driving module 161 can be a linear motor, a cylinder or an electric cylinder etc., by adjusting and controlling the drive module 161, the walking distance between the fixed wheel 12 and the moving wheel 13 can be adjusted, so that the transmission ratio can be adjusted according to the needs at any time, making the speed adjustment more flexible and reliable. Moreover, in the prior art, the moving wheel 13 needs to be accelerated to a very high speed when the vehicle is accelerating to achieve a small transmission ratio, and when decelerating, the moving wheel 13 needs to be decelerated to a very low speed to achieve a large transmission ratio. It takes a long time, the acceleration and deceleration of the vehicle are slow, and high power consumption is required during this acceleration and deceleration. However, the speed control device of this embodiment does not depend on the centrifugal roller and raceway structure in the driving wheel 13, and can be changed more quickly. The transmission ratio, the speed regulation efficiency is high, the vehicle accelerates or decelerates faster and saves electricity.

It can be seen from the above that, compared with the prior art, the speed governor of this embodiment can realize active control of the transmission ratio, and the speed regulation is more flexible and reliable, and at the same time, the transmission ratio can be changed more quickly, and the vehicle accelerates or decelerates faster and more efficiently. Save electricity, save electricity effectively.

Further, in this embodiment, the driving wheel 13 is mounted on the main shaft 11 by means of a spline structure. Specifically, as shown in FIG. 5 , the front end of the main shaft 11 is configured in the form of an external spline 111 , and the center hole of the driving wheel 13 is configured in an inner In the form of splines, the inner splines on the driving wheel 13 pass through the front end of the main shaft 11 and cooperate with the outer splines 111 on the main shaft 11, so that the driving wheel 13 can rotate with the main shaft 11 and can slide freely along the axial direction of the main shaft 11. By setting the spline structure in this embodiment, not only the moving wheel 13 can rotate with the main shaft 11 while sliding along the axial direction of the main shaft 11 , but also the main shaft 11 and the moving wheel 13 have high centering accuracy and can transmit large torque.

Further, the moving wheel 13 in this embodiment is connected to the movable plate 14 through the rotating body 15 . Specifically, as shown in FIGS. 5-6 , the rotating body 15 includes a first rotating part 151 fixedly connected with the moving wheel 13 and the movable plate 14 . The fixedly connected second rotating part 152 , the first rotating part 151 and the second rotating part 152 can rotate relative to each other, so that when the moving wheel 13 rotates with the main shaft 11 , the movable plate 14 may not rotate, but only drives the moving wheel 13 along the axis of the main shaft 11 . Make a linear motion in the direction. The rotating body 15 is optional but not limited to bearings. For example, the inner ring of the bearing can be configured as the first rotating part 151, and the outer ring of the bearing can be configured as the second rotating part 152, then the first rotating part 151 can rotate relative to the second rotating part 151. Section 152 rotates.

Preferably, as shown in FIG. 4 and FIG. 6 , the drive module 16 of this embodiment includes a drive module 161 , a drive plate 162 and a connector 163 , wherein the drive plate 162 is sleeved on the shaft sleeve 112 of the main shaft 11 and is connected with the shaft The sleeve 112 is screwed together, and the driving plate 162 is fixedly connected to the movable plate 14 through the connecting piece 163. The connecting piece 163 can move axially along the main shaft 11 but is limited in rotation. The driving module 161 is used to drive the sleeve 112 to rotate so that the driving plate 162 drives The movable plate 14 moves in the axial direction. Specifically, the shaft sleeve 112 is rotatably assembled on the main shaft 11, and the shaft sleeve 112 is rotatably assembled with the shaft sleeve seat 113 configured to be fixedly installed, that is, the main shaft 11 can rotate relative to the shaft sleeve 112, and the shaft sleeve 112 can be connected with the shaft sleeve seat 113. Relatively rotating, the shaft sleeve 112 is driven to rotate by the driving module 161 . Further, one end of the shaft sleeve 112 is rotatably assembled with the shaft sleeve seat 113, and the other end is sleeved with a drive plate 162 and is screwed with the drive plate 162, and the drive plate 162 is fixedly connected to the movable plate 14 through a connecting piece 163. The connecting piece 163 is formed as a cylinder, which can move along the axial direction of the main shaft 11 together with the driving plate 162 and the movable plate 14, but its rotation is limited and cannot rotate around the shaft sleeve 112, so that neither the driving plate 162 nor the movable plate 14 can rotate, Then, when the drive module 161 drives the shaft sleeve 112 to rotate, since the drive plate 162 cannot follow the shaft sleeve 112 to rotate, and the shaft sleeve 112 is limited by the drive module 161 and cannot move axially, then the drive plate 162 and the shaft sleeve 112 are equivalent to With the screw nut and screw structure, the drive plate 162 will move linearly along the axial direction of the main shaft 11 or the shaft sleeve 112 when the shaft sleeve 112 rotates, so that the drive plate 162 can drive the moving wheel through the connecting piece 163 and the movable plate 14 13 performs linear motion in the axial direction.

Further, the drive module 161 in this embodiment drives the shaft sleeve 112 to rotate by means of the worm gear set. As shown in FIGS. 4 and 6 , the drive module 161 is a right-angle motor, which can reduce the size of the governor in the axial direction of the main shaft 11 . , the worm gear set includes a worm 1611 driven by the drive module 161 and a worm wheel 1612 fixedly connected with the bushing 112 , and the drive module 161 drives the bushing 112 to rotate through the worm 1611 and the worm wheel 1612 in turn. Preferably, an intermediate idler gear 1613 is further arranged between the worm 1611 and the worm wheel 1612 , so that the rotation direction of the worm wheel 1612 and the rotation direction of the worm screw 1611 are the same. In this embodiment, the transmission is performed by the worm gear group, so that the transmission is more accurate and stable, so that the speed regulation of the governor is more stable and accurate.

Further, the speed governor of this embodiment further includes a housing 17 for accommodating the driving plate 162 and the connecting piece 163 , the connecting piece 163 is assembled to the housing 17 by means of a linear bearing 172 , and the housing 17 restricts the connecting piece 163 from revolving around the axis The sleeve 112 rotates and can only slide relative to the housing 17 in the axial direction, and the above-mentioned bushing seat 113 is also fixedly assembled with the housing 17 . Specifically, as shown in FIGS. 7-8 , a through hole 171 is formed on the casing 17 , and the connecting piece 163 penetrates through the casing 17 through the through hole 171 , and a contact bearing 1631 is also provided between the connecting piece 163 and the through hole 171 . , the contact area between the connector 163 and the housing 17 can be increased, and the connector 163 and the housing 17 can be protected to a certain extent. A linear bearing 172 fixed to the housing 17 is also provided between the driving plate 162 and the contact bearing 1631 , which can reduce friction and facilitate the sliding of the connecting piece 163 in the through hole 171 of the housing 17 . Preferably, there are a plurality of connecting pieces 163 , which are evenly spaced in the circumferential direction of the driving plate 162 , and a plurality of through holes 171 corresponding to the connecting pieces 163 are formed in the housing 17 . The matching of the holes 171 can better restrict the rotation of the connecting piece 163 around the shaft sleeve 112 .

As shown in FIGS. 4 and 6 , the main shaft 11 of this embodiment is rotatably assembled with the housing 17 by means of a rotary bearing 173 . Specifically, there are two rotary bearings 173 , and the two rotary bearings 173 make the rotation of the main shaft 11 more stable, and the two A sealing member 174 is respectively provided on the outer side of each rotating bearing 173 for realizing dynamic sealing and sealing and protecting the worm gear set and the shaft sleeve 112 and the like.

It can be seen from the above content that the speed governor provided in this embodiment can not only realize active control of the transmission ratio, but also stable, accurate and reliable speed control, and at the same time, the speed control efficiency is high, which can effectively save power consumption.

Embodiment 2:

This embodiment provides a speed regulating device. As shown in Figures 9-11, the speed regulating device includes a driving wheel set, a transmission belt 3 and a driven wheel set 2. The driving wheel set drives the driven wheel set 2 through the transmission belt 3. The wheel set is the rotating wheel set 1 in the first embodiment, and the transmission belt 3 can be a belt or a metal belt.

Further, the driven wheel set 2 in this embodiment is also a combined wheel set with adjustable walking distance. Specifically, as shown in FIG. 12 , the driven wheel set 2 includes a first slave side wheel 22 and a second slave side wheel 23 , the first slave side wheel 22 is fixed on the driven shaft 21, the second slave side wheel 23 is slidably mounted on the driven shaft 21 and can rotate with the driven shaft 21, and one side of the second slave side wheel 23 is provided with The elastic member 24 provides the second slave side pulley 23 with an axial pressure towards the first slave side pulley 22 . Specifically, the first slave side wheel 22 is fixed in the middle of the driven shaft 21 , the second slave side wheel 23 is arranged on one side of the first slave side wheel 22 , and the second slave side wheel 23 is mounted on the sliding sleeve 231 on the side of the first slave side wheel 22 . The driven shaft 21 can not only rotate with the driven shaft 21, but also move along the axial direction of the driven shaft 21. One side of the second slave side wheel 23 is provided with a limit plate 27 fixed to the driven shaft 21. The limit plate 27 and the second slave side wheel 23 rotate together with the driven shaft 21, and an elastic member 24 is also provided between the limit plate 27 and the second slave side wheel 2. The elastic member 24 is optional but not limited to a spring, Axial pressure can be provided for the second slave side pulley 23 so as to press the transmission belt 3 with the first slave side pulley 22 , so that the driving pulley set drives the driven pulley set 2 to rotate.

Preferably, the driven shaft 21 in this embodiment is connected to the central shaft 26 of the wheel through a transmission assembly 25, thereby driving the wheel to rotate. The transmission assembly 25 is optional but not limited to a worm gear assembly.

It can be seen from the above content that the speed control device provided in this embodiment can realize the active control of the transmission ratio by driving the driven wheel set to rotate through the driving wheel set, and the speed control control is stable, accurate and reliable, and the speed control efficiency is high. Effectively save power consumption.

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the inventive concept thereof shall be included within the protection scope of the present invention.

Claims (9)

1. A governor, comprising a rotating wheel set (1), the rotating wheel set (1) comprising a fixed wheel (12) fixed to a main shaft (11) and a movable wheel that freely slides along the axial direction of the main shaft (11) (13), the moving wheel (13) and the fixed wheel (12) constitute a combined wheel set with adjustable walking distance, characterized in that the governor includes a movable plate (14) connected with the moving wheel (13) ) and a driving module (16) that drives the movable plate (14) to move in the axial direction, the driving module (16) drives the moving wheel (13) to move in the axial direction by means of the movable plate (14) to move in the axial direction to Adjust the walking distance. 2 . The speed governor according to claim 1 , wherein the driving wheel ( 13 ) is mounted on the main shaft ( 11 ) by means of a spline structure, and the driving wheel ( 13 ) follows the main shaft ( 11 ). 3 . The rotation can be freely slid along the axial direction of the main shaft (11). 3. The governor according to claim 1 or 2, wherein the moving wheel (13) is connected to the movable plate (14) through a rotating body (15), and the rotating body (15) includes A first rotating part (151) fixedly connected with the moving wheel (13) and a second rotating part (152) fixedly connected with the movable plate (14), the first rotating part (151) and the second rotating part (152) ) relative to the rotation. 4. The governor according to claim 1, wherein the drive module (16) comprises: A drive plate (162), the drive plate (162) is sleeved on the shaft sleeve (112) of the main shaft (11) and is threadedly matched with the shaft sleeve (112), the main shaft (11) and the shaft sleeve (112) Rotating assembly, the driving plate (162) is fixedly connected to the movable plate (14) through a connecting piece (163), and the connecting piece (163) can move in the axial direction but is limited in rotation; A driving module (161) is used for driving the shaft sleeve (112) to rotate, so that the driving plate (162) drives the movable plate (14) to move in the axial direction. 5. The governor according to claim 4, characterized in that, the drive module (161) drives the shaft sleeve (112) to rotate by means of a worm gear set, wherein the worm gear set comprises a drive module (161) A driven worm (1611) and a worm wheel (1612) fixedly connected to the bushing (112), the drive module (161) drives the bushing (112) to rotate through the worm (1611) and the worm wheel (1612) in turn . 6. The governor according to claim 4, characterized in that, the governor further comprises a housing (17) accommodating the driving plate (162) and the connecting piece (163), the connecting piece (163). 163) is a cylinder penetrating the casing (17), and the cylinder can slide relative to the casing (17). 7. The governor according to claim 6, characterized in that there are a plurality of the cylinders, the casing (17) is formed with a plurality of through holes (171), and the cylinders are provided with linear bearings ( 172) is assembled to the through hole (171). 8. A speed control device, characterized in that, comprising: The rotating wheel set according to any one of claims 1-7, wherein the rotating wheel set is configured as a driving wheel set, and the driving wheel set drives the driven wheel set (2) through a transmission belt (3); A driven wheel set (2), the driven wheel set (2) is also a combined wheel set with adjustable walking distance. 9. The speed regulating device according to claim 8, wherein the driven wheel set (2) comprises a first slave side wheel (22) and a second slave side wheel (23), the first slave side wheel (23) The wheel (22) is fixed on the driven shaft (21), the second side wheel (23) is slidably mounted on the driven shaft (21) and can rotate with the driven shaft (21), the One side of the second slave side pulley (23) is provided with an elastic member (24) that provides the second slave side pulley (23) with an axial pressure toward the first slave side pulley (22).

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