KR20240009823A - Shift control device for single-axis two-speed drive - Google Patents

Abstract

The present invention relates to a shift control device for a drive device implemented to enable shifting on one axis by using a clearance control swash plate device and a friction clutch in combination.

Description

Shift control device for single-axis 2-speed drive {SHIFT CONTROL DEVICE FOR SINGLE-AXIS TWO-SPEED DRIVE}

The present invention relates to a shift control device for a drive device implemented to enable shifting on one axis by using a clearance control swash plate device and a friction clutch in combination.

Technology related to the present invention is disclosed in detail in Korean Patent Publication No. 10-2018-0124177 (published on November 21, 2018), so reference may be made.

The above-mentioned published patent features a driving device implemented to enable shifting on one axis by using a clearance control swash plate device and a friction clutch in combination.

However, in the above-mentioned published patent, shifting is accomplished through a pivot gear when shifting, and it was found that in the case of some single-axis two-speed drive devices, there are spatial limitations in design and adoption due to the pivot gear employed for shifting.

The present invention was created to solve the problems described above, and has achieved remarkable results, so we intend to propose this through the present invention.

The main purpose of the present invention is to propose a single-axis two-speed drive device by adopting a clearance control swash plate device for a transmission or reducer and a friction clutch using the same, and another purpose is to improve the shifting performance of a single-axis two-speed drive device, The purpose is to propose a single-axis 2-speed drive gear shift control device that can reduce assembly man-hours by simplifying the components of a single-axis 2-speed drive device and overcome spatial constraints when adopting a single-axis 2-speed drive device.

The solution for realizing the purpose of the present invention is,

As shown in Figures 1 and 2, it accommodates the power transmission shaft 10 and includes a ring gear drum 302 and a disk housing 304 including a band breaker 303 and a ring gear 305. a deceleration set 301;

It includes a sun gear 202 connected to the power transmission shaft 10, a planetary gear 203 engaged with the ring gear 305, and a carrier 204 connected to a differential device 501, and the ring gear A shifting set (201) assembled on the inner diameter of the drum (302);

3 and 4, a disk set 401 in which clutch disks 403 and plain disks 402 are alternately arranged and coupled to the inner diameter of the disk housing 304;

As shown in FIG. 5, the action plate 102, the first thrust bearing 103, which are sequentially coupled to the outermost disk of the disk set 401, the first and A clearance control swash plate device (100) including second clearance swash plates (104, 105), second thrust bearings (106), and thrust washers (107);

It is characterized by a single-axis two-speed drive device and a shift control device including a shift control device 601.

The above-described clutch disk 403 and plain disk 402 are characterized in that they can move in the axial direction and do not rotate in the circumferential direction.

The aforementioned shift control device 601,

As shown in Figure 6, a wire 112 with built-in tension coupled to both ends of the band breaker;

It includes a cable 602 coupled to interlock with the band breaker and the second clearance swash plate 105.

According to the present invention, a single-axis two-speed drive device employing a clearance control swash plate device and a friction clutch can be implemented, and the shift control device of the implemented single-axis two-speed drive device has a simplified configuration compared to the prior art to provide clear shifting. Not only can it be controlled, but it can also overcome spatial constraints in products using single-axis, two-speed drive devices, allowing for freedom of design and adoption.

Figure 1 is a perspective view of a single-axis two-speed drive device employing a clearance control swash plate device and a friction clutch according to the present invention.
FIG. 2 is an exploded perspective view of the single-axis, two-speed drive device shown in FIG. 1.
Figure 3 is a cross-sectional view showing the main part of the single-axis, two-speed drive device shown in Figure 1.
Figure 4 is an enlarged cross-sectional view of the main part of the clearance control swash plate device and friction clutch shown in Figure 3.
Figure 5 is a perspective view showing excerpts of the first and second clearance swash plates shown in Figure 2.
Figure 6 is a perspective view showing an excerpt of the band breaker of the present invention shown in Figure 2.
Figure 7 is a perspective view showing the main part of the interlocking structure of the band breaker and the second clearance swash plate shown in Figure 6.

Below, with reference to the attached drawings, preferred embodiments of the present invention will be described in detail so that those skilled in the art can easily implement the present invention.

However, since the description of the present invention is only an example for structural and functional explanation, the scope of the present invention should not be construed as limited by the examples described in the text.

For example, since the embodiments are capable of various changes and may have various forms, the scope of rights of the present invention should be understood to include equivalents that can realize the technical idea.

In addition, the purpose or effect presented in the present invention does not mean that a specific embodiment must include all or only such effects, so the scope of the present invention should not be understood as limited thereby.

In this specification, the present embodiments are provided to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention. And the present invention is only defined by the scope of the claims.

thus. In some embodiments, well-known components, well-known operations and well-known techniques are not specifically described to avoid ambiguous interpretation of the invention.

Meanwhile, the meaning of the terms described in the present invention is not limited to the dictionary meaning and should be understood as follows.

All terms used herein, unless otherwise defined, have the same meaning as generally understood by a person of ordinary skill in the field to which the present invention pertains. In addition, the terms described below are terms defined in consideration of functions in the present invention, and may vary depending on the intention or custom of the user or operator, and therefore their definitions should be made based on the content throughout the present specification.

Typically, terms defined in the dictionary should be interpreted as consistent with the meaning they have in the context of the related technology, and cannot be interpreted as having an ideal or excessively formal meaning unless clearly defined in the present invention.

Meanwhile, detailed descriptions of known functions or configurations related to the present invention may be omitted because the gist of the present invention may be diluted.

For reference, terms referring to components of a single-axis two-speed drive device employing a friction clutch including a clearance control swash plate device and a clearance control swash plate device described in the present invention, terms to describe drive characteristics, etc. is for convenience of explanation.

Accordingly, the present invention is not limited to the terms described below, and other terms referring to objects having equivalent technical meaning may be used.

Hereinafter, preferred embodiments of the present invention will be described in detail.

As shown in Figures 1 and 2, the single-axis two-speed drive device according to the present invention includes a power transmission shaft 10, a reduction set 301, a shift set 201, and a clearance control swash plate device 100. ), a differential device 501, and a shift control device 601.

The rotational power inherent in the aforementioned power transmission shaft 10 is shifted by the transmission set 201 and output through the differential device 501. This will be described later.

The above-mentioned reduction set 301 has a cylindrical shape that accommodates the above-described power transmission shaft 10, and includes a ring gear drum 302 and a disk housing 304 including a band breaker 303 and a ring gear 305. Includes.

The band breaker 303 described above is coupled to the outer peripheral surface of the ring gear drum 302, and the ring gear 305 is formed on the inner peripheral surface of the ring gear drum 302.

As shown in FIG. 2, the disk housing 304 is larger than the diameter of the ring gear drum 302 and is formed on one peripheral portion of the ring gear drum 302.

The disk housing 304 has a plurality of grooves 305a (FIG. 2) on its inner circumferential surface, and a disk set 401, which will be described later, is coupled to the inner diameter of the disk housing 304.

The band breaker 303 described above is a metal strip with a predetermined length rolled into a cylindrical shape and is coupled to the outer diameter of the ring gear drum 302.

The band breaker 303 described above includes a lining (not shown) coupled to its inner surface, and a shift control device 601.

The above-described shift control device 601 is intended to link the second clearance swash plate 105 by enlarging or reducing the radius of the band breaker 303, and a more detailed description will be provided in more detail later in this specification. .

Therefore, it is possible to control whether the ring gear drum 302 rotates as described above by adjusting the radius of the band breaker 303 through the shift control device 601. This will also be described later.

The above-mentioned shifting set 201 is assembled to the inner diameter of the ring gear drum 302 as shown in FIGS. 2 and 3 and transmits the power of the above-described power transmission shaft 10 to the differential device ( 501).

The aforementioned transmission set 201 includes a sun gear 202, a planet gear 203, and a carrier 204.

The carrier 204 can change rotational force by engaging the sun gear 202, the ring gear 305, and the planet gear 203, and by compressing and releasing the disk set 401, which will be described later.

As shown in FIGS. 2 and 3, the clearance control swash plate device 100 described above includes a disk set 401, an action plate 102, a first thrust bearing 103, and a first thrust bearing 103 provided on one surface. A first clearance swash plate 104 including one slope 109, a second clearance swash plate 105 including a second slope 111 provided on one surface, a second thrust bearing 106, and a thrust Includes washer 107.

The disk set 401 described above includes a plurality of clutch disks 403 and a plain disk 402 disposed between the clutch disks 403, as shown in FIG. 4, and the disk housing 304 described above. is assembled inside.

The surfaces of the above-mentioned disks 402 and 403 in contact with each other may be flat or may be in the shape of a cone inclined with respect to the axis.

The aforementioned clutch disk 403 includes a plurality of protrusions (not indicated) inserted into the aforementioned groove 305a, and the plain disk 402 includes a plurality of protrusions (not indicated) provided on the inner peripheral surface. do.

Therefore, the aforementioned clutch disk 403 can move in the axial direction of the disk housing 304 but cannot rotate in the circumferential direction, and the aforementioned plain disk 402 has a plurality of protrusions formed on its inner peripheral surface. (not shown) is coupled to the groove formed on the outer surface of the carrier 204, so that the carrier 204 can move in the axial direction but cannot rotate in the circumferential direction.

The clearance control swash plate device 100 described above is coupled to one side of the disk set 401 described above, as shown in FIGS. 2 and 3.

More specifically, the above-described action plate 102, the first thrust bearing 103, the first and second clearance swash plates 104 and 105, the second thrust bearing 106, and the thrust washer 107 ) is coupled to the power transmission shaft 10 to be sequentially positioned on the outermost disk set 403.

In the above-described disk set 403, both disks 402 and 403 can be compressed in the axial direction by external pressure and come into close contact with each other. Conversely, when the inherent external pressure is released, the gap between the disks 402 and 403 becomes loosely widened.

As shown in FIG. 5, the above-described first and second clearance swash plates 104 and 105 are inclined in the circumferential direction symmetrical to each other on surfaces facing each other and include first and second slopes 109 and 111, respectively, that protrude obliquely on the surface. do.

As shown in FIG. 1, the above-described second clearance swash plate 105 is provided with a worm gear (105a, FIG. 7) on its outer peripheral surface, and a drive motor (109) equipped with a worm (108, FIG. 1) that engages with the above-described worm gear. ) are connected to be interlocked.

Accordingly, the above-described second clearance swash plate 105 can be rotated when the drive motor rotates forward and backward.

As shown in FIG. 5, the first clearance swash plate 104 includes one or more anti-rotation protrusions (not indicated) fixed to the above-described disk housing 304 on its outer peripheral surface. Therefore, the first clearance swash plate 104 is prevented from rotating by the anti-rotation protrusion.

The above-described second clearance swash plate 105 includes studs 604 formed on its outer peripheral surface.

The above-described action plate 102 is an element for uniformly transmitting the pressure applied to the disk set 403, and the first and second thrust bearings 103 and 106 are the first and second clearance swash plates 104 and 105. ) is a bearing to support the bearing.

The aforementioned shift control device 601 is coupled to both ends of the band breaker 303, as shown in FIG. 6, and is an extension cable with inherent tension connected to the band breaker 303 and the second clearance swash plate 105. Includes (602).

In FIG. 6, an unexplained reference numeral 602a is a ring for coupling the end of the extension cable to the second clearance swash plate 105.

Therefore, when the second clearance swash plate 105 rotates, the radius of the band breaker 303 is adjusted through the shift control device 601.

In Figure 6, unillustrated reference numerals 112a and 112b are brackets for coupling the wire 112 to the band breaker 303, and 113a is a compression spring for applying tension to the wire 112 in the cable 602 described above. , and 113b is a hexagonal nut.

On the other hand, when the above-mentioned wire 112 is pulled, the diameter of the above-described band breaker 303 is reduced, and on the contrary, when the pulled wire 112 is released, the tension due to the compression spring 113a and the elasticity inherent in itself The diameter of the band breaker 303 is enlarged.

The radius of the band breaker 303 described above is adjusted in conjunction with the rotational movement of the second clearance swash plate 105 (rotation).

In this regard, when the above-described second clearance swash plate 105 is rotated clockwise, the above-described disks 402 and 403 are compressed by the first and second slopes 109 and 111 that are close to each other, When one second clearance swash plate 105 is rotated in the opposite direction, the gap between the aforementioned compressed disks 402 and 403 widens and becomes loose.

When both disks 402 and 403 are compressed, the ring gear drum 302, the disk housing 304, and the carrier 204 are rotated, and the rotational force of the sun gear 202 is generated by the ring gear drum ( 302) and is transmitted to the differential device 501 through the carrier 204.

Conversely, when the above-mentioned disks 402 and 403 are opened, the radius of the band breaker 303 is expanded so that the ring gear drum 302 and the ring gear rotate freely, and the ring gear drum 302 and the ring gear rotate freely. The carriers 204 are coupled and rotate together. For an explanation related to this, please refer to Publication Patent No. 10-2018-0124177 as it is explained in more detail.

In the above, preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but this is merely an illustrative description to aid understanding of the present invention, and those skilled in the art will understand this invention. Although various applications or modifications may be made based on the invention, it is to be clarified in advance that such applications or modifications are included in the true technical idea intended by the present inventor and the scope of rights defined in the claims.

10: Drive shaft 100: Clearance control swash plate device
102: Action plate 103: First thrust bearing
104: first clearance swash plate 105: second clearance swash plate
106: second thrust bearing 107: thrust washer
109: first slope 110: anti-rotation protrusion
111: second slope 201: planetary gear set
202: sun gear 203: planetary gear
204: Carrier 301: Deceleration set
302: Ring gear drum 303: Band breaker
304: disk housing 305: ring gear
401: Disk set 402: Plain disk
403: Clutch disc 501: Differential device
601: Shift control device 602: Cable
604: stud

Claims (2)

A deceleration set 301 that accommodates the power transmission shaft 10 and includes a ring gear drum 302 and a disk housing 304 having an elastic band breaker 303 and a ring gear 305;
It includes a sun gear 202 connected to the power transmission shaft 10, a planetary gear 203 engaged with the ring gear 305, and a carrier 204 connected to a differential device 501, and the ring gear A shifting set (201) assembled on the inner diameter of the drum (302);
a disk set 401 in which clutch disks 403 and plain disks 402 are alternately arranged and coupled to the inner diameter of the disk housing 304;
The action plate 102 sequentially coupled to the outermost disk of the disk set 401, the first and second clearance swash plates 104 and 105 each having slopes on opposing surfaces of the first thrust bearing 103, and the second Clearance control swash plate device 100 including a thrust bearing 106 and a thrust washer 107; and
A single-axis two-speed drive device and shift control device comprising a shift control device (601).
According to paragraph 1,
The shift control device 601,
A wire 112 coupled to both ends of the band breaker 303;
A single-axis two-speed drive device and shift control device comprising a cable (602) coupled between the band breaker (303) and the second clearance swash plate (105) to interlock with the wire (112).