CN116557498A - Differential assembly and automatic mobile equipment - Google Patents
Differential assembly and automatic mobile equipment Download PDFInfo
- Publication number
- CN116557498A CN116557498A CN202210103107.3A CN202210103107A CN116557498A CN 116557498 A CN116557498 A CN 116557498A CN 202210103107 A CN202210103107 A CN 202210103107A CN 116557498 A CN116557498 A CN 116557498A
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- Prior art keywords
- differential assembly
- bracket
- transmission hub
- recited
- annular body
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- 230000005540 biological transmission Effects 0.000 claims abstract description 51
- 230000004308 accommodation Effects 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 11
- 230000001360 synchronised effect Effects 0.000 abstract description 4
- 230000007704 transition Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H48/00—Differential gearings
- F16H48/20—Arrangements for suppressing or influencing the differential action, e.g. locking devices
- F16H48/22—Arrangements for suppressing or influencing the differential action, e.g. locking devices using friction clutches or brakes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/04—Automatic clutches actuated entirely mechanically controlled by angular speed
- F16D43/14—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members
- F16D43/16—Automatic clutches actuated entirely mechanically controlled by angular speed with centrifugal masses actuating the clutching members directly in a direction which has at least a radial component; with centrifugal masses themselves being the clutching members with clutching members having interengaging parts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Retarders (AREA)
Abstract
A differential assembly and an automatic movement device. The differential assembly includes: action wheel and locking part, action wheel include: the main part, the central part of main part has the through-hole, disposes the tooth on the surface of the circumference of action wheel, and the tooth is used for with drive gear engagement, the even configuration in circumference of main part holds the chamber, holds one side and the through-hole intercommunication in chamber, and locking part installs on the main part, and locking part includes: an intermediate member having: the device comprises a body, wherein a first transmission hub is arranged on one side of the body, a second transmission hub is arranged on the side, opposite to the first transmission hub, of the body, a plurality of retainers are arranged on the middle part at intervals in the circumferential direction, each retainer accommodates a pair of rollers, and projections of the first transmission hub and the second transmission hub on the body are located in the outline of the body. The differential assembly can realize automatic locking. The self-mobile equipment realizes synchronous driving on two sides, and automatically switches according to road conditions and scenes without human intervention.
Description
Technical Field
The present application relates to power transmission fittings in a drive train of an automatic mobile device, and in particular to a differential assembly and an automatic mobile device incorporating the same.
Background
The differential is mainly applied to transportation tools such as automobiles, logistics vehicles and the like, and self-driven tools such as snowploughs, mowers and the like are also applied. The existing differential assembly has the following problems: when the road is muddy and wet and slippery, the wheels on two sides are easy to slip on one side and the other wheel is not moving due to different poles of adhesive force, the driving force and traction force are extremely reduced, the generated effective driving capacity is only 2 times of the sliding friction force of the wheel on the sliding side, the wheels are difficult to get out of the way, and the working capacity is lost.
For this reason, improvements are required for the differential for garden equipment and the like.
Disclosure of Invention
To overcome the above drawbacks, the present application has for its object: a differential assembly is provided for realizing an automatic locking differential function of wheels on both sides when an automatic moving device is used, realizing synchronous rotation, and exerting the total driving force of two wheels.
In order to achieve the above purpose, the present application adopts the following technical scheme:
a differential assembly, comprising:
a driving wheel and a locking component,
the driving wheel comprises: a main body part, teeth are arranged on the circumferential surface of the main body part and are used for being meshed with a driving gear, a hollowed-out part is arranged in the main body part and is used for accommodating the locking part,
the locking member includes: an intermediate member having:
the annular body, one side of annular body disposes first transmission hub, the annular body with the second transmission hub of one side that is opposite to first transmission hub disposes, the circumference of annular body is with a plurality of holders of interval disposes, every the holder holds a pair of roller, and the projection of first transmission hub and second transmission hub on annular body is in the profile of annular body. The pair of rollers are matched with the corresponding first transmission hubs and the second transmission hubs respectively. The diameters of the first transmission hub and the second transmission hub are smaller than or slightly smaller than the diameter of the annular body of the middle part, through the design, the roller contacts with the outer side surface of the first transmission hub or the outer side surface of the second transmission hub during rotation, and the differential assembly can realize automatic locking.
Preferably, the hollow part comprises a through hole arranged in the center of the main body part and a containing cavity communicated with the through hole. The accommodating cavity is U-shaped or arched.
Preferably, the cage is arranged parallel to the axis of the annular body. The number of the retainers is 2-20. Preferably, the number of the retainers is 5. Preferably, the cage extends to the first and second hub sides.
In one embodiment, the receiving cavity is U-shaped or arcuate. The bottom wall of the accommodating cavity is at least partially linear under a visual angle, for example, the bottom wall of the accommodating cavity comprises 2 inclined planes and a transition part connecting the two inclined planes.
In one embodiment, teeth are provided on the inner bore walls of the first and second drive hubs for securing the embedded drive shaft.
In one embodiment, the driving wheel is provided with end caps at two sides respectively, and the two opposite end caps are fixed at two sides of the driving wheel through the connecting piece.
In one embodiment, the cage comprises: the roller rack comprises a first support, a second support and a partition board, wherein the combination of the first support, the second support and the partition board is H-shaped, a first accommodating area and a second accommodating area are formed in the retainer through the partition board, and the first accommodating area and the second accommodating area are respectively used for accommodating cylindrical rollers.
In one embodiment, the differential assembly,
the first accommodation area and the second accommodation area have the same length along the direction of the first bracket or the second bracket.
In one embodiment, the differential assembly,
the length h2 of the first receiving area or the second receiving area is greater or slightly greater than the length h1 of the roller in a direction along the first bracket or the second bracket.
In one embodiment, the differential assembly,
the length of the first bracket or the second bracket is the same as the thickness of the main body part along the axial direction of the intermediate member.
In an embodiment, the inner wall of the first bracket and the inner wall of the second bracket have radians respectively, and the inner wall of the first bracket and the inner wall of the second bracket are symmetrically designed along the central line of the retainer.
In one embodiment, the main body portion is uniformly provided with first through holes, through which connecting members (such as bolts) pass, and the end caps are fixed to both sides of the main body portion.
The embodiment of the application provides automatic mobile equipment, which is provided with the differential assembly. The automatic mobile equipment can realize automatic locking, prevent slipping, realize synchronous driving at two sides and automatically switch according to road conditions and scenes without human intervention.
Advantageous effects
Compared with the prior art, the differential assembly can realize automatic locking and prevent slipping, is used for realizing synchronous driving on two sides when moving equipment, and can automatically switch according to road conditions and scenes without human intervention.
Drawings
The accompanying drawings are included to provide an understanding of the technical aspects of the present disclosure, and are incorporated in and constitute a part of this specification, illustrate the technical aspects of the present disclosure and together with the embodiments of the disclosure, not to limit the technical aspects of the present disclosure. The shapes and sizes of the various components in the drawings are not to scale, and are intended to be illustrative only of the present application.
Figure 1 is a schematic perspective view of a differential assembly according to an embodiment of the present application,
figures 2-12 are schematic views of the internal structure of the differential assembly of the embodiment of figure 1,
figure 13 is a schematic view of the differential assembly of the present embodiment from one perspective,
fig. 14 is a schematic cross-sectional view at E-E in fig. 13.
Detailed Description
The above-described aspects are further described below in conjunction with specific embodiments. It should be understood that these examples are illustrative of the present application and are not limiting the scope of the present application. The implementation conditions employed in the examples may be further adjusted as in the case of the specific manufacturer, and the implementation conditions not specified are typically those in routine experiments.
Unless otherwise defined, technical or scientific terms used in the embodiments of the present disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present application pertains. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Examples
The application provides a differential assembly and carry its automatic mobile device.
The differential assembly (also referred to as a drive member, having a differential limiting/unlocking function) includes: the driving wheel and the locking component are embedded into the driving wheel. The driving wheel comprises: a main body part, wherein a containing cavity is uniformly arranged in the circumferential direction of the main body part, one side of the containing cavity is communicated with a through hole in the central part of the main body part, and teeth are arranged on the circumferential surface of the driving wheel and are used for being meshed with the driving gear; the locking member includes: an intermediate member having: the transmission mechanism comprises a body, a first transmission hub and a second transmission hub which are arranged on two sides of the body, wherein a plurality of retainers parallel or approximately parallel to the axis of the differential assembly are arranged on the middle part at intervals in the circumferential direction, each retainer accommodates a pair of rollers, the two rollers are arranged side by side, and the projection of the first transmission hub and the second transmission hub on the body is positioned in the outline of the body. After the body is embedded into the through hole of the central part of the main body part, the retainer is positioned in the matched accommodating cavity. The differential assembly is carried to realize automatic locking. By the design, the differential assembly overcomes the defect that the existing differential assembly cannot be automatically locked under the condition that the differential locking function is not available or the differential is available, and the differential locking function can be realized only by manual operation. The differential assembly can be used for automatic mobile equipment such as riding mowers, snowploughs and the like, meets the requirements of working conditions, and automatically switches according to road conditions and scenes without human intervention.
As shown in fig. 1, a schematic perspective view of a differential assembly according to an embodiment of the present application,
the differential assembly 100 includes:
the driving wheel 110, the end caps 120 are respectively disposed on two sides of the driving wheel 110, and the end caps 120 disposed opposite to each other are fixed on two sides of the driving wheel 110 through the connecting member 130.
The driving wheel 110 is provided with teeth 111 on a circumferential surface thereof, and the teeth 111 are for engagement with a driving gear (not shown). The differential assembly 100 is provided with a through-hole 170 in the middle thereof, the through-hole 170 being for connection of a drive shaft (not shown) having an end thereof remote from the differential assembly 100 for connection of a roller. Thus, after the differential assembly 100 is used for a self-moving device, power is transmitted through the differential assembly based on driving of the driving gear, the driving shaft rotates to further rotate the roller connected with the driving shaft, and the roller rotates to further drive the self-moving device to move. In a preferred embodiment, the connection 130 may be a bolt and nut combination. In other embodiments, the connector may be a rivet, as long as the securing of the end cap is achieved.
The differential assembly proposed in the present application is described in detail below in conjunction with fig. 2-14.
The driving wheel 110 includes:
the main body 111a has a through hole 114 in the center of the main body 111a, and teeth 111 are provided on the circumferential surface of the driving wheel 110, the teeth 111 being for engagement with a driving gear (not shown). The main body 111a is uniformly provided with first through holes 113 and a housing chamber 112. The first through hole 113 is used to pass through a coupling member (e.g., a bolt) to fix the end cap 120 (see fig. 1).
The accommodating cavity 112 has a hollow structure (i.e. one side of the accommodating cavity 112 is communicated with the through hole 114) at a side far away from the bottom wall. The receiving chamber 112 is arcuate. In this embodiment, the bottom wall includes a sloped surface 112a. As shown in fig. 2, the bottom wall of the accommodating cavity 112 is at least partially linear in a view angle, that is, the bottom wall of the accommodating cavity 112 includes 2 inclined surfaces 112a and a transition portion 112b connecting the two inclined surfaces 112a. For the accommodation chamber 112, 2 inclined surfaces 112a are symmetrically arranged. The curvature of the inclined surface 112a is different from that of the transition portion 112b. In this embodiment, 5 accommodation chambers 112 are uniformly arranged. In other embodiments, the bottom wall of the receiving cavity 112 is at least partially curved.
The differential assembly includes a locking member therein, the locking member comprising: the middle part 150 includes a first transmission hub 140 and a second transmission hub 160, wherein the first transmission hub 140 and the second transmission hub 160 are located at both sides of the middle part 150. The intermediate member 150 has an annular body 150a, a plurality of holders 151 are disposed at intervals in the circumferential direction of the intermediate member 150, an annular gasket 154 is disposed in the annular body 150a, and the gasket 154 divides the through hole 170 into two cavities for respectively connecting drive shafts (not shown).
The holder 151 (see fig. 7 and 8) includes: the first and second holders 151b, 151c, and the partition 151a disposed opposite to each other divide the holder 151 into 2 accommodation areas by the partition 151a, and the first and second accommodation areas 152a, 152b are provided for accommodating the cylindrical rollers 153. The holder 151 is H-shaped (symmetrical along the partition 151 a), and preferably, the lengths H2 of the first and second receiving areas 152a and 152b are the same in the direction along the first or second brackets 151b and 151 c. The length h2 is slightly greater than the length (height) h1 of the roller 153. In a preferred embodiment, the ratio of the length h2 of the first receiving area 152a or the second receiving area 152b to the length/height h1 of the roller 153 is 1.1-1.3. The first and second receiving areas 152a and 152b are symmetrically disposed along the partition 151 a. The thickness of the body 150a is the same or substantially the same as the thickness of the spacer 151 a. The first bracket 151b or the second bracket 151c of the intermediate member protrudes from the surface of the body 150a in the axial direction by the same or substantially the same distance as the thickness of the first transmission hub 140 or the thickness of the second transmission hub 160. Such that the first drive hub 140, in combination with the intermediate member, exposes the projection 142. The first transmission hub 140, the intermediate member 150, and the second transmission hub 160 are combined to have the same (or substantially the same) axial thickness as the thickness h3 of the main body 111a, or the first bracket or the second bracket has the same (or substantially the same) length as the thickness h3 of the main body 111a, so that it appears that the first transmission hub 140 and the second transmission hub 160 are embedded in the main body 111a in appearance. In this embodiment, the number of holders is 5, and in other embodiments, the number of holders is 2 or more, for example, 2, 3, 6, 7, 8, 9, 10, 15, 16, 17, 18, 19, or 20.
The inner wall 151b1 of the first bracket 151b and the inner wall 151c1 of the second bracket 151c each have an arc. In the present embodiment, the distance t1 between the bottom (end) of the inner wall 151b1 of the first bracket 151b and the bottom (end) of the inner wall 151c1 of the second bracket 151c is smaller than the diameter d of the roller 153 (i.e., t1< d). In other embodiments, the hollowed-out distance t1 of the bottom (end) may be greater than or equal to the diameter d of the roller 153.
Thus, when the drive wheel rolls, the roller 153 rolls to the inner wall 151b1 or the inner wall 151c1 in the first accommodation area or the second accommodation area and can roll along the inner wall 151b1 or the inner wall 151c1 to contact with the circumferential surface 144 of the first transmission hub 140, thereby realizing automatic locking (contact reference of the roller 153 with the circumferential surface of the second transmission hub 160, contact of the roller 153 with the circumferential surface 144 of the first transmission hub 140). Preferably, the inner wall 151b1 of the first bracket 151b and the inner wall 151c1 of the second bracket 151c are symmetrical along the center line a (i.e., the center line of the holder). Preferably, the cage 151 is disposed parallel to the central axis of the differential assembly. In the present embodiment, 5 holders 151 are uniformly arranged on the intermediate member 150, and 2 rollers 153 are arranged on each holder 151. In other embodiments, the number of pairs of holders 151 may be multiple, such as 3, 4, 6, 7, etc. The inner wall 151b1 has a first end 151b2 and a second end 151b3, and the inner wall 151c1 has a third end 151c2 and a fourth end 151c3, and a distance t1 between the first end 151b2 and the third end 151c2 is smaller than a distance t2 between the second end 151b3 and the fourth end 151c 3. After the locking member is mounted on the driving wheel 110, a gap is formed between the second end 151b3 and the fourth end 151c3 and the bottom wall 112a of the accommodating chamber 112 (see fig. 11).
In this embodiment, the first transmission hub 140 and the second transmission hub 160 have the same structure and are symmetrically mounted on both sides of the middle member 150, and the structure of the first transmission hub 140 will be described with reference to fig. 5 and 8. In one embodiment, one side of the first drive hub 140 has a projection 142 and an annular groove 143 surrounding the projection 142. The weight can be reduced by providing an annular groove. The wall of the bore of the first drive hub 140 is provided with teeth 141 for connection to a drive shaft (not shown). In other embodiments, the annular groove (i.e., the area that originally filled the original annular groove) may be eliminated.
The locking member is shown in fig. 4, i.e. the intermediate member 150 is combined with the first and second hubs 140 and 160. The locking member is mounted in the through hole 114 of the main body portion 111a, and the cage is accommodated in the accommodation chamber 112 together with the roller 153. The two end caps 120 cover one side of the first and second hubs 140 and 160, respectively. When the differential assembly is driven, the driving wheel rotates anticlockwise (as shown in fig. 11), and when the main body 111a rotates, the inclined surface 112a (the bottom wall is configured to be inclined) of the accommodating cavity pushes the roller 153 to press against the matched first transmission hub/second transmission hub on two sides, so that the first transmission hub/second transmission hub is driven to rotate to generate power to realize transmission, and then the driving shaft connected in a matching manner is driven. In the process that the driving wheel drives the first/second transmission hubs to rotate, if the rotating speed of the first or second transmission hubs on one side exceeds the rotating speed of the driving wheel (for example, the rotating speed of the outer wheel exceeds the rotating speed of the inner wheel when the automatic mobile device turns), the corresponding first or second transmission hubs on the side can drive the rollers on the same side to move relatively with the driving wheel to push away from the inclined plane, and under the blocking limit of the retainer (the first bracket 151b, the second bracket 151c and the partition 151a, namely, the first accommodating area 152a or the second accommodating area 152 b), the rollers are kept in a larger space, and the rollers are free to rotate and power to separate, so that the differential function on two sides is realized. When one side of the wheels slides, the resistance is not lost, so the roller is still pressed in the inclined plane space, the other side of the wheels is not influenced by the resistance, the two sides of the wheels still rotate synchronously, and the two wheels still can provide the maximum traction force. The cage in this embodiment is also referred to as a limit cage.
The embodiment of the application provides automatic mobile equipment, which is provided with the differential assembly. The automatic mobile device may be a riding lawn mower, snowplow, or the like.
The foregoing embodiments are provided to illustrate the technical concept and features of the present application and are intended to enable those skilled in the art to understand the contents of the present application and implement the same according to the contents, and are not intended to limit the scope of the present application. All such equivalent changes and modifications as come within the spirit of the disclosure are desired to be protected.
Claims (10)
1. A differential assembly, comprising:
a driving wheel and a locking component,
the driving wheel comprises: a main body part, teeth are arranged on the circumferential surface of the main body part and are used for being meshed with a driving gear, a hollowed-out part is arranged in the main body part and is used for accommodating the locking part,
the locking member includes: an intermediate member having:
the annular body, one side of annular body disposes first transmission hub, the annular body with the second transmission hub of one side that is opposite to first transmission hub disposes, the circumference of annular body is with a plurality of holders of interval disposes, every the holder holds a pair of roller, and the projection of first transmission hub and second transmission hub on annular body is in the profile of annular body.
2. The differential assembly of claim 1, wherein the projections of the pair of rollers in the radial direction of the annular body face the first drive hub and the second drive hub, respectively.
3. The differential assembly as recited in claim 1, wherein,
end covers are respectively arranged on two sides of the driving wheel, and the two oppositely arranged end covers are respectively fixed on two sides of the driving wheel through connecting pieces.
4. The differential assembly as recited in claim 1, wherein,
the retainer includes:
the roller rack comprises a first support, a second support and a partition board, wherein the combination of the first support, the second support and the partition board is H-shaped, the partition board divides the retainer into a first accommodating area and a second accommodating area, and the first accommodating area and the second accommodating area are respectively used for accommodating cylindrical rollers.
5. The differential assembly as recited in claim 4, wherein,
the first accommodation area and the second accommodation area have the same length along the direction of the first bracket or the second bracket.
6. The differential assembly as recited in claim 4, wherein,
the length h2 of the first receiving area or the second receiving area is greater than the length h1 of the roller in a direction along the first bracket or the second bracket.
7. The differential assembly as recited in claim 4, wherein,
the length of the first bracket or the second bracket is the same as the thickness of the main body part along the axial direction of the intermediate member.
8. The differential assembly as recited in claim 4, wherein,
the inner wall of the first bracket and the inner wall of the second bracket are respectively provided with radians, and the inner wall of the first bracket and the inner wall of the second bracket are symmetrically designed along a central line.
9. The differential assembly as recited in claim 1, wherein,
the number of the retainers is 2-20.
10. An automatic mobile device, characterized in that it is equipped with a differential assembly as claimed in any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210103107.3A CN116557498A (en) | 2022-01-27 | 2022-01-27 | Differential assembly and automatic mobile equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210103107.3A CN116557498A (en) | 2022-01-27 | 2022-01-27 | Differential assembly and automatic mobile equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116557498A true CN116557498A (en) | 2023-08-08 |
Family
ID=87486599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210103107.3A Pending CN116557498A (en) | 2022-01-27 | 2022-01-27 | Differential assembly and automatic mobile equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116557498A (en) |
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2022
- 2022-01-27 CN CN202210103107.3A patent/CN116557498A/en active Pending
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