Mechanical clutch for garden machine tool

Abstract

The mechanical clutch for the garden machine tool is applied to the technical field of clutches and comprises a support shell, a transmission shaft sleeve capable of being in transmission connection with an output shaft of an external engine is rotationally installed on the support shell, and the transmission shaft sleeve is sleeved with a driving wheel set; a driving disc is movably installed on the inner side of the support shell, a clutch disc is installed on the transmission shaft sleeve in the axial direction in a sliding mode, the clutch disc is arranged on the outer side of the driving disc, and the driving disc is used for pushing the clutch disc in the axial direction. The driving wheel set comprises a driving wheel and a friction disc capable of axially floating relative to the driving wheel, an elastic piece is installed between the friction disc and the driving wheel, and the friction disc is located on the outer side of the clutch disc. When the clutch disc is separated from the friction disc, the elastic piece can axially push the friction disc to enable the end face of the friction disc to abut against the support shell, and rapid braking of the driving wheel is achieved. The friction disc is designed in an axial floating mode, and after the clutch disc is separated, the elastic piece can push the friction disc to abut against the support shell to achieve rapid braking of the driving wheel.

Description

Technical Field

[0001] The present application relates to the technical field of clutches, and in particular to a mechanical clutch for gardening machinery. Background Art

[0002] The clutch is a commonly used component in the transmission system, usually located between the engine and the gearbox. It is mainly used to engage or disengage the transmission system when needed, to output or disconnect the engine power, thereby realizing power transmission and control between the engine and the gearbox.

[0003] Taking the mechanical clutch as an example, it mainly transmits power through friction, usually by external force pushing the clutch plate or clutch disc so that it can contact the drive flywheel. As the friction force increases, the drive flywheel starts to rotate, transmitting the output power generated by the engine to the gearbox.

[0004] Currently available gardening equipment, such as snowplows, snowblowers, and lawn mowers, often utilize clutches. These clutches are used to achieve power output for snowplows, snowblowers, and lawn mowers. Mechanical clutches transmit power through friction. When the clutch plate or disc loses contact with the drive flywheel, the flywheel continues to rotate due to inertia until it stops. Therefore, is it possible to design a mechanical clutch that can achieve a rapid stop when the clutch plate or disc loses contact with the drive flywheel? Summary of the Invention

[0005] (1) Technical issues to be resolved

[0006] In view of this, the present application provides a mechanical clutch for garden machinery, which realizes clutching through the contact or separation of the clutch disc and the friction disc; the friction disc adopts an axial floating design, and after the clutch disc is separated, its friction disc will automatically abut against the bracket shell to realize rapid braking of the drive wheel.

[0007] (2) Technical solution

[0008] The embodiments of this specification provide the following technical solutions:

[0009] The embodiment of the present specification provides a mechanical clutch for garden machinery, comprising a bracket housing, wherein the bracket housing is rotatably mounted with a transmission shaft sleeve which can be connected to the output shaft of an external engine, and the transmission shaft sleeve is equipped with a driving wheel group; a driving plate is movably mounted on the inner side of the bracket housing, and the transmission shaft sleeve is axially slidably mounted with a clutch plate, and the clutch plate is arranged on the outer side of the driving plate; the driving wheel group includes a driving wheel and a friction plate which can float axially relative to the driving wheel, an elastic member is installed between the friction plate and the driving wheel, and the friction plate is located on the outer side of the clutch plate; the driving plate is used to axially push the clutch plate so that the side end surface of the clutch plate abuts against the friction plate, and the entire driving wheel group is driven to rotate by friction force; after the driving plate is reset, the clutch plate is disengaged from the friction plate, and the elastic member axially pushes the friction plate so that its end surface abuts against the bracket housing, thereby achieving rapid braking of the driving wheel.

[0010] In this solution, an elastic part is installed between the driving wheel and the friction plate of the driving wheel group, and the friction plate is of a floating design; when the clutch plate is disengaged from the friction plate, the elastic part will push the friction plate against the bracket shell, and use end face friction to quickly stop the friction plate, thereby achieving rapid braking of the driving wheel.

[0011] In some embodiments, a friction plate is mounted on the side end surface of the clutch disc or the friction disc; and / or the bracket housing forms an inner end surface that can contact the friction disc to achieve braking.

[0012] In this solution, the friction plate can be set on the clutch plate or the friction plate, the purpose of which is to increase the friction force between the clutch plate and the friction plate so that the two can form a whole through friction and achieve synchronous rotation.

[0013] In some embodiments, the friction disc is slidably mounted on the drive wheel through a plurality of guide positioning columns, and the elastic member is a first spring sleeved on the guide positioning columns; the axial displacement of the clutch disc pushed by the drive disc is greater than the sliding displacement of the friction disc on the guide positioning columns.

[0014] In this solution, there are three guide positioning columns, which are fastened to the drive wheel by nuts and are equipped with elastic parts. The axial displacement of the drive plate must be greater than the axial floating displacement of the friction plate to ensure that when the drive plate pushes the clutch plate, it can abut against the friction plate.

[0015] In some embodiments, a second spring is installed on the outer side of the clutch disc, and the second spring is used to always push the clutch disc to separate the clutch disc from the friction disc.

[0016] In this solution, when the external force applied to the driving plate is released, the driving plate is reset. At this time, the clutch can be pushed axially by the second spring to separate it from the friction plate.

[0017] In some embodiments, the drive wheel assembly is mounted on the end of the transmission sleeve via a first bearing; the second spring is located between the clutch plate and the first bearing; and / or the first bearing is mounted to the drive wheel via a bearing sleeve.

[0018] In this solution, the driving wheel is mounted to the transmission sleeve via the first bearing and the bearing sleeve. When the clutch is separated from the friction plate, the rotation of the transmission sleeve will not drive the driving wheel to rotate.

[0019] In some embodiments, the drive plate is rotatably mounted on the transmission sleeve via a second bearing, the outer ring of the second bearing is mounted on the drive plate, and the inner ring of the second bearing rests against the side end of the clutch plate via a gasket.

[0020] In this solution, the second bearing can move axially, thereby driving the clutch disc to move toward the friction disc.

[0021] In some embodiments, a plurality of first track grooves with groove depths increasing or decreasing in sequence are arranged at equal intervals in an annular manner on the side end of the driving disk; a plurality of second track grooves with groove depths decreasing or increasing in sequence are arranged at equal intervals in an annular manner on the inner side wall of the bracket shell, and a track groove for placing balls is formed between the first track groove and the second track groove. By rotating the driving disk, the balls are driven to roll in the track groove, and the balls push the driving disk relative to the axial direction to move toward the side of the clutch disk, thereby pushing the clutch disk to abut against the friction disk.

[0022] In this solution, a track groove for placing balls is formed by splicing the first track groove and the second track groove. Therefore, when an external force pulls the driving plate to rotate, the balls will be driven to move along the track groove, and then the driving plate will be pushed axially toward the clutch plate. The groove depth design of the second track groove is opposite to that of the first track groove, so that the driving plate can be quickly pushed to the clutch plate by the balls during rotation; the structural principle of the cooperation between the above-mentioned track groove and the balls is similar to the principle of the disk cam movement, which is used to switch the rotational motion to the axial motion displacement.

[0023] In some embodiments, the drive disk is installed with a third spring for resetting, and the drive disk is provided with a hook end for connecting to the third spring; a spring frame for connecting to the third spring is installed on the bracket housing.

[0024] In this solution, when the external force applied to the driving disk is removed, the driving disk can be reset by the third spring.

[0025] In some embodiments, the hook end is connected to an external control console via a pull rope, and a wire rack for passing the pull rope is installed on the bracket shell.

[0026] In this solution, the control console controls the rotation of the driving disk by pulling the rope, thereby achieving the axial movement of the driving disk.

[0027] In some embodiments, the transmission sleeve is mounted in the bracket housing via a third bearing; and / or, a spline is provided on an outer surface of the transmission sleeve, and a spline groove is coaxially provided on the clutch disc.

[0028] (3) Beneficial effects

[0029] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above-mentioned technical solutions adopted in the embodiments of this specification include at least the following: the utility model can quickly push the friction disk of the driving wheel group against the bracket shell through the elastic member, thereby realizing the rapid braking of the driving wheel and improving the safety of use; by setting a second spring, when the driving disk is reset, the clutch disk and the friction disk are quickly separated by the second spring; the driving disk can push the clutch disk to move axially through the second bearing; the first track groove and the second track groove are spliced ​​together to form a track groove for placing ball bearings. When the driving disk rotates, the driving disk can be moved axially toward one side of the clutch disk, converting the rotational power of the driving disk into the axial movement power of the driving disk; the driving disk is automatically reset by the third spring, which is connected to the external control console through a pull rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0031] Figure 1 is a stereogram in this application;

[0032] Figure 2 It is a stereogram from another perspective in this application;

[0033] Figure 3 It is a schematic diagram of the structure in this application;

[0034] Figure 4 is an exploded view of this application;

[0035] Figure 5 It is a structural diagram of the ball-related parts in this application;

[0036] Figure 6 is a perspective view of the drive disc in this application;

[0037] Figure 7 is a three-dimensional diagram of the bracket housing in this application;

[0038] Figure 8 is a partial cross-sectional view of the driving wheel set in this application;

[0039] Figure 9 It is a three-dimensional diagram of the clutch disc in this application;

[0040] Among them: 1 is the bracket housing, 2 is the transmission shaft sleeve, 3 is the driving wheel group, 4 is the driving disc, 5 is the clutch disc, 6 is the friction plate, 7 is the second spring, 8 is the first bearing, 9 is the bearing sleeve, 10 is the second bearing, 11 is the ball, 12 is the third bearing, 101 is the inner end face, 102 is the second track groove, 103 is the spring frame, 104 is the wire frame, 105 is the avoidance groove, 301 is the driving wheel, 302 is the friction disc, 303 is the guide positioning column, 304 is the first spring, 401 is the first track groove, 402 is the third spring, and 403 is the hook end. DETAILED DESCRIPTION

[0041] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0042] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following embodiments and embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0043] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement an apparatus and / or practice a method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this apparatus and / or practice this method.

[0044] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0045] Additionally, in the following description, specific details are provided to provide a thorough understanding of the examples, however, one skilled in the art will appreciate that the examples can be practiced without these specific details.

[0046] Combine Figures 1-9 As shown, the present application provides a mechanical clutch for garden machinery, comprising a bracket housing 1, the bracket housing 1 is rotatably mounted with a transmission sleeve 2 that can be connected to the output shaft of an external engine, and the transmission sleeve 2 is sheathed with a drive wheel set 3, as shown in FIG. Figure 3 As shown, the drive wheel assembly 3 is mounted on the end of the transmission sleeve 2 via a first bearing 8. When the clutch 5 is disengaged from the friction plate 302, the rotation of the transmission sleeve 2 does not drive the drive wheel 301. A drive plate 4 is movably mounted on the inside of the bracket housing 1. A clutch plate 5 is axially slidably mounted on the transmission sleeve 2 and disposed outside the drive plate 4. The drive plate 4 is used to axially push the clutch plate 5, causing the side end surface of the clutch plate 5 to abut against the friction plate 302, thereby driving the entire drive wheel assembly 3 to rotate through friction.

[0047] In one example, Figure 3 As shown, the first bearing 8 is mounted to the driving wheel 301 through the bearing sleeve 9.

[0048] like Figure 8 As shown, the drive wheel assembly 3 includes a drive wheel 301 and a friction disc 302 that is axially floating relative to the drive wheel 301. An elastic member is installed between the friction disc 302 and the drive wheel 301, and the friction disc 302 is located outside the clutch disc 5. When the drive disc 4 is reset, the clutch disc 5 disengages from the friction disc 302. The elastic member axially pushes the friction disc 302 so that its end face abuts against the bracket housing 1, achieving a rapid braking effect on the drive wheel 301.

[0049] The friction disc 302 of this embodiment is of floating design and can move axially relative to the drive wheel 301. When the clutch disc 5 is disengaged from the friction disc 302, its elastic member will push the friction disc 302 against the bracket shell 1, and use end face friction to quickly stop the friction disc 302, thereby achieving a quick braking of the drive wheel 301.

[0050] In some embodiments, a friction plate 6 is mounted on the side end surface of the clutch disc 5 or the friction disc 302 .

[0051] In one example, Figure 4and Figure 9 As shown, the friction plate 6 is arranged on the clutch disc 5 .

[0052] In some embodiments, as Figure 5 and Figure 7 As shown, the bracket housing 1 forms an inner end surface 101 that can contact the friction disk 302 to achieve friction braking.

[0053] In some embodiments, as Figure 1 、 Figure 3 and Figure 8 As shown, the friction disc 302 is slidably mounted on the driving wheel 301 through a plurality of guide positioning posts 303, and the guide positioning posts 303 are fastened to the driving wheel 301 through nuts; the elastic member is a first spring 304 sleeved on the guide positioning posts 303; the axial displacement of the clutch disc 5 pushed by the driving disc 4 is greater than the sliding displacement of the friction disc 302 on the guide positioning posts 303, ensuring that when the driving disc 4 pushes the clutch disc 5, it can abut against the friction disc 302.

[0054] It should be noted that the number and installation position of the guide positioning posts 303 are not limited. In one example, Figure 1 As shown, there are three guide and positioning posts 303 .

[0055] In some embodiments, as Figure 3 As shown, a second spring 7 is installed on the outside of the clutch disc 5. The second spring 7 is used to always push the clutch disc 5 to separate the clutch disc 5 from the friction disc 302.

[0056] Among them, such as Figure 3 As shown, the second spring 7 is located between the clutch disc 5 and the first bearing 8 .

[0057] In some embodiments, as Figure 3 As shown, the drive disc 4 is rotatably mounted on the transmission sleeve 2 via a second bearing 10 , the outer ring of the second bearing 10 is mounted on the drive disc 4 , and the inner ring of the second bearing 10 abuts against the side end of the clutch disc 5 via a gasket.

[0058] In some embodiments, as Figure 4 、 Figure 5-Figure 7 As shown, a plurality of first track grooves 401 with groove depths increasing or decreasing in sequence are arranged at equal intervals in an annular manner on the side end of the driving disk 4; a plurality of second track grooves 102 with groove depths decreasing or increasing in sequence are arranged at equal intervals in an annular manner on the inner side wall of the bracket shell 1, and a track groove for accommodating the ball 11 is formed between the first track groove 401 and the second track groove 102. Therefore, when an external force pulls the driving disk 4 to rotate circumferentially, it will drive the ball 11 to roll in the track groove, and the ball 11 will push the driving disk 4 axially toward the side of the clutch disk 5 relative to the axial direction, thereby pushing the clutch disk 5 to abut against the friction disk 302.

[0059] It should be noted that the number of track grooves formed by the first track groove 401 and the second track groove 102 is not limited; in one example, Figure 6 and Figure 7 As shown, there are 3 groups of track grooves.

[0060] In some embodiments, as Figure 1 and Figure 4 As shown, the drive disk 4 is installed with a third spring 402 for resetting. When the external force applied to the drive disk 4 is removed, the drive disk 4 can be reset by the third spring 402; Figure 6 As shown, the drive disc 4 is provided with a hook end 403 for connecting the third spring 402; Figure 1 and Figure 2 As shown, a spring bracket 103 for connecting the third spring 402 is installed on the bracket housing 1 .

[0061] In some embodiments, the hook end 403 is connected to an external control console via a pull rope (not shown in the figure), and the control console controls the rotation of the drive disk 4 through the pull rope, thereby achieving axial movement of the drive disk 4; Figure 1 As shown, a wire passing rack 104 for passing the pull rope is installed on the bracket housing 1, and a wire passing groove is provided on the wire passing rack 104.

[0062] In some embodiments, as Figure 3 As shown, the transmission sleeve 2 is installed in the bracket housing 1 through the third bearing 12; Figure 4 As shown, the outer surface of the transmission sleeve 2 is provided with splines, and the clutch disc 5 is coaxially provided with spline grooves.

[0063] In this specification, the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the embodiments described later, the description is relatively simple, and the relevant parts can be referred to the partial description of the previous embodiments.

[0064] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A mechanical clutch for garden machinery, comprising a bracket housing (1), wherein the bracket housing (1) is rotatably mounted with a transmission sleeve (2) that can be connected to the output shaft of an external engine, and the transmission sleeve (2) is sheathed with a drive wheel set (3); characterized in that: A driving disc (4) is movably mounted on the inner side of the bracket housing (1), a clutch disc (5) is axially slidably mounted on the transmission sleeve (2), and the clutch disc (5) is arranged on the outer side of the driving disc (4); The driving wheel assembly (3) comprises a driving wheel (301) and a friction disc (302) capable of axially floating relative to the driving wheel (301), an elastic member is installed between the friction disc (302) and the driving wheel (301), and the friction disc (302) is located outside the clutch disc (5); The driving disc (4) is used to axially push the clutch disc (5), so that the side end surface of the clutch disc (5) abuts against the friction disc (302), and the entire driving wheel assembly (3) is driven to rotate by friction force; after the driving disc (4) is reset, the clutch disc (5) is disengaged from the friction disc (302), and the elastic member axially pushes the friction disc (302) so that its end surface abuts against the bracket housing (1), thereby achieving a rapid braking of the driving wheel (301).

2. The mechanical clutch for garden machinery according to claim 1, characterized in that: A friction plate (6) is mounted on the side end surface of the clutch disc (5) or the friction disc (302); and / or the bracket housing (1) forms an inner end surface (101) that can contact the friction disc (302) to achieve braking.

3. The mechanical clutch for garden machinery according to claim 1, characterized in that: The friction disc (302) is slidably mounted on the driving wheel (301) via a plurality of guide positioning columns (303); the elastic member is a first spring (304) sleeved on the guide positioning columns (303); the axial displacement of the clutch disc (5) pushed by the driving disc (4) is greater than the sliding displacement of the friction disc (302) on the guide positioning columns (303).

4. The mechanical clutch for garden machinery according to claim 1, characterized in that: A second spring (7) is installed on the outside of the clutch disc (5), and the second spring (7) is used to always push the clutch disc (5) to separate the clutch disc (5) from the friction disc (302).

5. The mechanical clutch for garden machinery according to claim 4, characterized in that: The driving wheel assembly (3) is mounted on the end of the transmission sleeve (2) via a first bearing (8); the second spring (7) is located between the clutch disc (5) and the first bearing (8); and / or the first bearing (8) is mounted to the driving wheel (301) via a bearing sleeve (9).

6. The mechanical clutch for garden machinery according to claim 1, characterized in that: The driving disc (4) is rotatably mounted on the transmission sleeve (2) via a second bearing (10); the outer ring of the second bearing (10) is mounted on the driving disc (4); and the inner ring of the second bearing (10) abuts against the side end of the clutch disc (5) via a gasket.

7. The mechanical clutch for gardening machinery according to claim 1 or 6, characterized in that: The side end of the driving disk (4) is provided with a plurality of first track grooves (401) with groove depths increasing or decreasing in sequence at equal intervals in an annular manner; the inner side wall of the bracket housing (1) is provided with a plurality of second track grooves (102) with groove depths decreasing or increasing in sequence at equal intervals in an annular manner, and a track groove for accommodating balls (11) is formed between the first track groove (401) and the second track groove (102). By rotating the driving disk (4), the balls (11) are driven to roll in the track groove, and the balls (11) push the driving disk (4) relative to the axial direction toward one side of the clutch disk (5), thereby pushing the clutch disk (5) to abut against the friction disk (302).

8. The mechanical clutch for gardening machinery according to claim 7, characterized in that: The driving disk (4) is equipped with a third spring (402) for resetting, and the driving disk (4) is provided with a hook end (403) for connecting to the third spring (402); and a spring frame (103) for connecting to the third spring (402) is installed on the bracket housing (1).

9. The mechanical clutch for garden machinery according to claim 8, characterized in that: The hook end (403) is connected to an external control console via a pull rope, and a wire guide rack (104) for guiding the pull rope is installed on the bracket housing (1).

10. The mechanical clutch for garden machinery according to claim 1, characterized in that: The transmission sleeve (2) is mounted in the bracket housing (1) via a third bearing (12); and / or the outer surface of the transmission sleeve (2) is provided with a spline, and the clutch disc (5) is coaxially provided with a spline groove.

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