CN220847801U

CN220847801U - Caterpillar band transmission mechanism

Info

Publication number: CN220847801U
Application number: CN202322564413.XU
Authority: CN
Inventors: 景诸刚; 徐德良; 施晓东; 周建钟
Original assignee: Zhejiang Jindao Technology Co ltd
Current assignee: Zhejiang Jindao Technology Co ltd
Priority date: 2023-09-20
Filing date: 2023-09-20
Publication date: 2024-04-26
Anticipated expiration: 2033-09-20

Abstract

The utility model relates to a crawler belt transmission mechanism which comprises a hub, an annular gear, a connecting gear, a supporting shell, a sun gear shaft, a planetary gear set and a planet carrier, wherein the planetary gear set is meshed between the sun gear and the annular gear and is arranged on the planet carrier through a pin shaft; the support shell is fixedly provided with a bearing seat, the input shaft is installed in the bearing seat through the bearing, a transition gear is sleeved on one side end part of the sun gear shaft, which is opposite to the sun gear, the transition gear comprises a wheel sleeve sleeved on the sun gear shaft, a wheel disc which is outwards extended and formed on the wheel sleeve in a cantilever shape in the circumferential direction, and an external tooth part which is formed on the wheel disc in the circumferential direction, and the external tooth part is meshed with the input shaft. In the technical scheme, the bearing seat is arranged on the supporting shell in an extending manner, the input shaft is installed in the bearing seat, the structure is compact, the shell or the box body is not required to be used for supporting the input shaft, and the installation cost and the installation volume are reduced.

Description

Caterpillar band transmission mechanism

Technical Field

The utility model relates to the technical field of bulldozers, in particular to a crawler belt transmission mechanism.

Background

The crawler dozer is widely applied to the fields of mines, water conservancy, construction, road construction, coal mining, ports, agriculture and forestry, national defense engineering and the like, can finish the operations of excavation, accumulation, backfilling, leveling, compaction and the like, and is ideal equipment for short-distance operation.

The final transmission structure of the existing bulldozer is mainly of a secondary parallel shaft structure, the service life of a gear is greatly influenced under the working condition of high load, and the secondary parallel shaft structure is required to be improved to meet the higher load requirement of customers, so that the upper load limit of the final transmission structure is improved. One Chinese patent of the utility model with the publication number of CN202899191U discloses a final drive structure and a bulldozer, which belong to the technical field of bulldozer components, wherein the final drive structure comprises a spur gear drive module, a driving shaft, a planetary gear drive module and a driving hub; the spur gear transmission module is connected with the power source and one end of the driving shaft, so that the power of the power source is transmitted to the driving shaft after being decelerated; the planetary gear transmission module is connected with one end of the driving shaft, which is back to the spur gear transmission module, and the driving hub, so that the power of the driving shaft is transmitted to the driving hub after being decelerated; the outer edge of the driving hub is connected with a tooth block for driving the crawler belt. A bulldozer includes the final drive. The technical scheme has the beneficial effects that: the weight of the whole machine is not born, only power is transmitted, and the design range of a final transmission structure is enlarged; the structure is compact, so the design range is wide, the transmission ratio distribution in the whole transmission system is convenient, the load of the main transmission gear is reduced, and the service life of the transmission system is prolonged; the final transmission structure of the wide-track bulldozer for the wetland is changed into very convenient.

However, the above scheme has the following problems: the final transmission structure needs to additionally use the box body or the shell to support the bearings on the pinion and the large gear when in use, thereby causing inconvenience of troublesome installation and increased installation volume for users.

Disclosure of Invention

In order to solve the problems, the utility model aims to provide a crawler belt transmission mechanism which is compact in structure, good in sealing performance, capable of being directly installed and used, free of a box body or a shell to support, greatly reduced in installation volume, improved in assembly efficiency and reduced in assembly cost.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

The crawler belt transmission mechanism comprises a hub, an annular gear, a connecting gear, a supporting shell, a sun gear shaft, a planetary gear set and a planet carrier, wherein the annular gear, the connecting gear and the supporting shell are sequentially connected and arranged in the hub, the connecting gear is meshed with the annular gear, the sun gear shaft penetrates through the supporting shell, the end part of the sun gear shaft is provided with the sun gear, the planetary gear set is meshed and arranged between the sun gear and the annular gear and is arranged on the planet carrier through a pin shaft, and the planet carrier is fixedly arranged at the outer end of the hub; the method is characterized in that:

The support shell is fixedly provided with a bearing seat, the input shaft is installed in the bearing seat through the bearing, a transition gear is sleeved on one side end part of the sun gear shaft, which is opposite to the sun gear, the transition gear comprises a wheel sleeve sleeved on the sun gear shaft, a wheel disc which is outwards extended and formed on the wheel sleeve in a cantilever shape in the circumferential direction, and an external tooth part which is formed on the wheel disc in the circumferential direction, and the external tooth part is meshed with the input shaft.

Preferably, two ends of the input shaft are respectively arranged in the bearing seat through two single-row tapered roller bearings, and an opening is formed in the side wall of the bearing seat for the external tooth part to extend into the bearing seat to be meshed with the input shaft.

Preferably, the support shell is provided with a mounting hole, one end part of the bearing seat extends into the mounting hole, an end cover is arranged on the end part, and the lower end of the end cover presses the outer ring of the single-row tapered roller bearing.

Preferably, a shaft seal is arranged at one end of the input shaft corresponding to the end cover, and a framework oil seal is arranged between the other end of the input shaft and the bearing seat.

Preferably, the end part of the support shell corresponding to the transition gear is constructed into an arc surface with high inside and low outside, and the wheel disc is a curved surface disc corresponding to the arc surface.

Preferably, the transition gear is mounted on the support housing by a double row tapered roller bearing.

Preferably, the inner wall of the support shell is provided with a first step and a second step which are adjacent to each other; a third step is constructed on the wheel sleeve, and the outer end of the third step is constructed into an inclined plane; a first clamping groove is formed in the wheel sleeve corresponding to the first step, and a second clamping groove is formed in the inner wall of the support shell corresponding to the third step;

The inner end of the retainer ring is clamped into the first clamping groove, and the outer end of the retainer ring is correspondingly abutted against the first step; the outer end of the clamping ring is clamped into the second clamping groove, and the inner end of the clamping ring is matched and abutted on the inclined plane;

And two end surfaces of an outer ring of the double-row tapered roller bearing are respectively abutted on the second step and the clamping ring, and two end surfaces of an inner ring of the double-row tapered roller bearing are respectively abutted on the clamping ring and the third step.

Preferably, the wheel disc is provided with at least one assembly hole for the snap ring to extend in.

Preferably, a dustproof baffle ring and a floating oil seal are arranged between the support shell and the hub in a sealing manner, and the floating oil seal is positioned on the outer side of the dustproof baffle ring.

Preferably, a stop pin is arranged between the planet carrier and the sun gear shaft.

The utility model adopts the technical scheme and has the following beneficial effects:

1. the bearing seat is arranged on the support shell in an extending way, the input shaft is arranged in the bearing seat, the structure is compact, the input shaft is not required to be supported by the shell or the box body, and the installation cost and the installation volume are reduced;

2. The double-row tapered roller bearing greatly improves the bearing capacity of the transition gear and prolongs the service life of the gear;

3. The double-row tapered roller bearing is used as an inner support of the transition gear, a shell or a box body is not required to be used for supporting the transition gear, and the installation cost and the installation volume are reduced;

4. The cantilever-shaped wheel disc is a cambered surface of the curved surface disc, which is closer to the supporting shell, so that an input shaft meshed with the transition gear is installed towards the side of the planet carrier, the structure is more compact, and the installation volume is reduced.

5. The transmission moment of the curved disc is longer, a certain transmission speed reduction effect is achieved, and the service life of the gear is prolonged;

6. the dustproof baffle ring, the floating oil seal, the framework oil seal and other parts are adopted to improve the sealing effect of the structure;

The transmission principle of the final transmission structure is as follows: the power is input to the input shaft, and the input shaft sequentially transmits the power to the transition gear, the sun gear shaft, the planetary gear set and the planet carrier, so that the hub is driven to rotate.

Drawings

Fig. 1 is a schematic top view of a track drive.

Fig. 2 is a cross-sectional view taken along A-A of fig. 1.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Embodiment one:

The caterpillar drive mechanism shown in fig. 1-2 comprises a hub 1, an annular gear 2, a connecting gear 3, a support shell 14, a sun gear shaft 5, a planetary gear set 6 and a planet carrier 7, wherein the annular gear 2, the connecting gear 3 and the support shell 14 are sequentially connected and arranged in the hub 1, the connecting gear 3 is meshed with the annular gear 2, the sun gear shaft 5 passes through the support shell 14, the end part of the sun gear shaft 5 is provided with a sun gear, the planetary gear set 6 is meshed and arranged between the sun gear and the annular gear 2 and is arranged on the planet carrier 7 through a pin shaft 100, and the planet carrier 7 is fixedly arranged at the outer end of the hub 1; the bearing seat 16 is fixedly arranged on the support shell 14, the input shaft 9 is installed in the bearing seat 16 through a bearing, a transition gear 10 is sleeved on one side end part of the sun gear shaft 5, which is opposite to the sun gear, the transition gear 10 comprises a wheel sleeve 11 sleeved on the sun gear shaft 5, a wheel disc 12 which is outwards extended and formed on the wheel sleeve 11 in a cantilever shape in the circumferential direction, and an external tooth part 13 which is formed on the wheel disc 12 in the circumferential direction, and the external tooth part 13 is meshed with the input shaft 9.

In the technical scheme, the bearing seat is arranged on the supporting shell, and the input shaft is arranged in the bearing seat, so that the structure is compact, the shell or the box body is not required to be used for supporting the input shaft, and the installation cost and the installation volume are reduced; and the wheel disc of the transition gear is cantilever-shaped, so that the transmission speed reduction effect between the input shaft and the transition gear can be improved, and the service life of the gear can be prolonged.

Further, two ends of the input shaft 9 are respectively installed in the bearing seat 16 through two single-row tapered roller bearings 17, and an opening is formed in the side wall of the bearing seat 16 to allow the external tooth part 13 to extend into the bearing seat 16 to be meshed with the input shaft 9. According to the technical scheme, the input shaft is arranged in the bearing seat through the two single-row tapered roller bearings, so that the bearing capacity of the input shaft can be improved, and the input shaft is better protected.

Further, a mounting hole 15 is formed in the support housing 14, one end portion of the bearing seat 16 extends into the mounting hole 15, an end cover 18 is mounted on the end portion, and the lower end of the end cover 18 presses against the outer ring of the single-row tapered roller bearing 17. In the technical scheme, the end cover is convenient to assemble and disassemble the input shaft, and when the single-row tapered roller bearing is installed, the axial clearance of the bearing is convenient to set, so that the use safety of the bearing is ensured.

Further, a shaft seal 19 is disposed at one end of the input shaft 9 corresponding to the end cover 18, and a framework oil seal 20 is disposed between the other end and the bearing seat 16. In this technical scheme, shaft seal 19 prevents oil leakage between input shaft and bearing, and skeleton oil blanket 20 is used for preventing the lubricating oil leakage in the bearing frame, all plays sealed effect.

Further, the end of the support housing 14 corresponding to the transition gear 10 is constructed as an arc surface with high inside and low outside, and the wheel disc 12 is a curved disc corresponding to the arc surface. In the technical scheme, the cambered surface of the supporting shell 14 is closely attached to the cambered surface of the supporting shell, so that the input shaft meshed with the transition gear is installed towards the planet carrier side, the structure is more compact, and the installation volume is reduced.

Further, the transition gear 10 is mounted on the support housing 14 by a double row tapered roller bearing 21. In the technical scheme, the double-row tapered roller bearing can greatly improve the bearing capacity of the transition gear and well protect the gear.

Further, the inner wall of the support housing 14 is constructed with adjacent first and second steps; a third step is constructed on the wheel sleeve 11, and the outer end of the third step is constructed as an inclined plane; a first clamping groove is formed in the wheel sleeve 11 corresponding to the first step, and a second clamping groove is formed in the inner wall of the support shell 14 corresponding to the third step;

a retainer ring 24 and a retainer ring 25 are respectively abutted on the inner end surface and the outer end surface of the double-row tapered roller bearing 21, the inner end of the retainer ring 24 is clamped into the first clamping groove, and the outer end of the retainer ring 24 is correspondingly abutted on the first step; the outer end of the clamping ring 25 is clamped into the second clamping groove, and the inner end of the clamping ring 25 is matched and abutted on the inclined plane;

The two end surfaces of the outer ring of the double-row tapered roller bearing 21 are respectively abutted against the second step and the snap ring 25, and the two end surfaces of the inner ring of the double-row tapered roller bearing 21 are respectively abutted against the retainer ring 24 and the third step.

In the technical scheme, the double-row tapered roller bearing is arranged between the support shell and the transition gear to serve as an inner support, so that the mechanism does not need to use the shell or the box body to support the transition gear, and the installation cost and the installation volume are reduced.

Further, at least one assembly hole 4 is formed in the wheel disc 12 for the snap ring 25 to extend into. In this technical scheme, during the assembly, biserial tapered roller bearing installs on transition gear, biserial tapered roller bearing's 21 inner circle outer end and third step butt, with the inner clamping of retaining ring 24 on first draw-in groove for biserial tapered roller bearing's 21 inner circle inner end and retaining ring 24 butt, install transition gear on the sun gear axle, retaining ring outer end and biserial tapered roller bearing's 21 outer lane inner end face butt respectively on first step and second step, the snap ring passes mounting hole 4, the outer end imbeds in the second draw-in groove, inner and inclined plane butt cooperation. The arrangement of the retainer ring 24 and the retainer ring can also facilitate the adjustment of the axial play of the double-row tapered roller bearing.

Further, a dust-proof baffle ring 26 and a floating oil seal 27 are arranged between the support shell 14 and the hub 1 in a sealing manner, and the floating oil seal 27 is arranged on the outer side of the dust-proof baffle ring 26. In this technical scheme, dustproof baffle ring 26 can prevent effectively that entering dust from getting into between support housing 4 and the wheel hub 1, and the setting of floating oil blanket can protect inside lubricating grease not to leak, and both have sealed effect and play certain cushioning effect.

Further, a stop pin 28 is installed between the planet carrier 7 and the sun gear shaft 5. In this solution, the provision of the blocking pin 28 prevents the sun gear shaft from floating up and down against the planet carrier during operation, thus providing protection.

Further, an outer baffle 29 is fixedly arranged at the lower end of the inner gear ring 2, the short teeth of the connecting gear 3 are positioned above the outer baffle 29, an inner baffle 30 is fixedly arranged at the upper end of the supporting shell 4, and the inner baffle 30 is positioned between the sun gear and the supporting shell 4. The outer baffle 29 is provided to prevent the broken teeth of the connecting gear from moving downward, and the inner baffle 30 improves the structural stability of the support housing.

In this particular embodiment, there is not supporting location to a pair of meshing teeth in the current track transmission structure, and the structure is compact enough, and the two-stage parallel shaft structure has the load big, the problem that the gear life is influenced, the fixed bearing seat on the above-mentioned scheme support casing, install the input shaft in the bearing frame through two single-row tapered roller bearings, and adjust single-row tapered roller bearing's axial play through the end cover, install the transition gear on support casing through a double-row tapered roller bearing again, double-row tapered roller bearing is as transition gear's internal support, and adjust double-row tapered roller bearing's axial play through retaining ring and snap ring, therefore, the pair of meshing tooth side need not to install casing or box again and supports, compact structure, the installation is small, and make the bearing capacity of a pair of meshing teeth improve greatly through setting up tapered roller bearing, better protection gear. In addition, the curved surface disc of the transition gear is closer to the cambered surface of the support shell, so that the input shaft is closer to the direction in which the planet carrier is located, the compactness of the mechanism is further improved, and the installation volume is reduced.

Embodiment two:

A crawler dozer includes a track drive mechanism according to the first embodiment.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made in the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model.

Claims

1. The utility model provides a crawler belt transmission mechanism, including wheel hub (1), ring gear (2), connecting gear (3), support casing (14), sun gear axle (5), planetary gear set (6) and planet carrier (7), wherein, ring gear (2), connecting gear (3) and support casing (14) connect gradually and set up in wheel hub (1), connecting gear (3) are meshed with ring gear (2), sun gear axle (5) pass support casing (14), the tip of sun gear axle (5) is equipped with the sun gear, planetary gear set (6) meshing sets up between sun gear and ring gear (2) and installs on planet carrier (7) through round pin axle (100), planet carrier (7) fixed mounting is in wheel hub (1) outer end; the method is characterized in that:

The utility model discloses a solar energy power transmission device, including support casing (14), bearing frame (16) is fixed to be equipped with on support casing (14), input shaft (9) install through the bearing in bearing frame (16), transition gear (10) have been cup jointed on the relative one side tip that the sun gear set up of sun gear axle (5), transition gear (10) are including cover wheel hub (11) on locating sun gear axle (5), circumference outside extension shaping wheel disc (12) and circumference shaping that are the cantilever form on wheel hub (11) in external tooth portion (13) on wheel disc (12), external tooth portion (13) with input shaft (9) meshing.

2. A track drive as claimed in claim 1, wherein: the two ends of the input shaft (9) are respectively arranged in a bearing seat (16) through two single-row tapered roller bearings (17), and an opening is formed in the side wall of the bearing seat (16) for the external tooth part (13) to extend into the bearing seat (16) to be meshed with the input shaft (9).

3. A track drive as claimed in claim 2, wherein: the bearing is characterized in that a mounting hole (15) is formed in the support shell (14), one end portion of the bearing seat (16) stretches into the mounting hole (15), an end cover (18) is arranged on the end portion, and the lower end of the end cover (18) presses the outer ring of the single-row tapered roller bearing (17).

4. A track drive as claimed in claim 3, wherein: one end of the input shaft (9) corresponding to the end cover (18) is provided with a shaft seal (19), and a framework oil seal (20) is arranged between the other end and the bearing seat (16).

5. A track drive as claimed in claim 1, wherein: the end part of the support shell (14) corresponding to the transition gear (10) is constructed into an arc surface with high inside and low outside, and the wheel disc (12) is a curved surface disc corresponding to the arc surface.

6. A track drive as defined in claim 5 wherein: the transition gear (10) is mounted on the support housing (14) through a double-row tapered roller bearing (21).

7. A track drive as defined in claim 6 wherein: adjacent first steps and second steps are constructed on the inner wall of the support shell (14); a third step is constructed on the wheel sleeve (11), and the outer end of the third step is constructed into an inclined plane; a first clamping groove is formed in the wheel sleeve (11) corresponding to the first step, and a second clamping groove is formed in the inner wall of the supporting shell (14) corresponding to the third step;

A retainer ring (24) and a retainer ring (25) are respectively abutted on the inner end face and the outer end face of the double-row tapered roller bearing (21), the inner end of the retainer ring (24) is clamped into the first clamping groove, and the outer end of the retainer ring (24) is correspondingly abutted on the first step; the outer end of the clamping ring (25) is clamped into the second clamping groove, and the inner end of the clamping ring (25) is matched and abutted on the inclined plane;

the two end faces of the outer ring of the double-row tapered roller bearing (21) are respectively abutted against the second step and the clamping ring (25), and the two end faces of the inner ring of the double-row tapered roller bearing (21) are respectively abutted against the retaining ring (24) and the third step.

8. A track drive as claimed in claim 7, wherein: at least one assembly hole (4) is formed in the wheel disc (12) and is used for the clamping ring (25) to extend in.

9. A track drive as claimed in claim 1, wherein: a dustproof baffle ring (26) and a floating oil seal (27) are arranged between the support shell (14) and the hub (1) in a sealing mode, and the floating oil seal (27) is located on the outer side of the dustproof baffle ring (26).

10. A track drive as claimed in claim 1, wherein: a stop pin (28) is arranged between the planet carrier (7) and the sun gear shaft (5).