CN112389555A - Guide wheel mechanism, drive device, and excavator - Google Patents
Guide wheel mechanism, drive device, and excavator Download PDFInfo
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- CN112389555A CN112389555A CN202011339163.4A CN202011339163A CN112389555A CN 112389555 A CN112389555 A CN 112389555A CN 202011339163 A CN202011339163 A CN 202011339163A CN 112389555 A CN112389555 A CN 112389555A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D55/00—Endless track vehicles
- B62D55/08—Endless track units; Parts thereof
- B62D55/12—Arrangement, location, or adaptation of driving sprockets
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Abstract
The application provides a guide wheel mechanism, a driving device and an excavator, and relates to the field of engineering machinery. The application provides a guide wheel mechanism, including the guide holder, set up in the regulating part of guide holder and rotate the guide wheel of connecting in the regulating part, the regulating part has changeable first gesture and second gesture for the guide holder, and the axis of guide wheel is higher than the axis of guide wheel under the condition that the regulating part is in the second gesture under the condition that the regulating part is in first gesture. Therefore, according to different kinds of track installation needs, adjust the height of regulating part to adjust the height of leading wheel, satisfy the installation demand of different tracks, make after installing different tracks, all have the stability and the comfort level of preferred. The driving device and the excavator provided by the application both comprise the guide wheel mechanism, so that the driving device and the excavator also have the advantage of being suitable for mounting different types of tracks.
Description
Technical Field
The application relates to the field of engineering machinery, in particular to a guide wheel mechanism, a driving device and an excavator.
Background
The requirements for the walking vibration comfort and the working stability of the excavator at the current stage are very high, particularly for a small excavator, a rubber track and a steel track are required to be switched and prepared according to conditions sometimes, but the requirements of different tracks on a structural part of a lower vehicle are not completely the same. For example, the lower plane of the track below the leading wheel end may be nearly level with the ground when the track is fitted with a rubber track, whereas a steel track may require a small angle. If according to the requirement of steel track structure, can influence stability when adorning rubber track, and if according to the structural requirement dress steel track of rubber track then the vibration travelling comfort also can receive the influence, consequently, the installation user demand of different tracks is difficult to satisfy to current guide wheel mechanism.
Disclosure of Invention
The object of the present application includes, for example, providing a guide wheel mechanism, a drive device and an excavator, which are able to meet the installation requirements of different tracks.
The embodiment of the application can be realized as follows:
in a first aspect, the application provides a guide wheel mechanism, which is applied to a driving device of an excavator and comprises a guide seat, an adjusting piece arranged on the guide seat and a guide wheel rotatably connected to the adjusting piece, wherein the adjusting piece has a first posture and a second posture which can be switched relative to the guide seat, and the axis of the guide wheel is higher when the adjusting piece is in the first posture than when the adjusting piece is in the second posture.
In an alternative embodiment, the guide seat has a slot having opposite upper and lower walls, the adjustment member is at least partially located within the slot and has a dimension less than that of the slot in the height direction, the adjustment member is selectively attached to or spaced from the upper wall of the slot to adjust the height of the guide wheel; the adjusting piece is connected with the upper wall surface of the clamping groove under the condition of the first posture and is spaced from the upper wall surface of the clamping groove under the condition of the second posture.
In an alternative embodiment, the guide wheel mechanism further comprises a gasket, the gasket is selectively arranged on the upper wall surface or the lower wall surface, and when the adjusting piece is in the first posture, the gasket is arranged on the lower wall surface and abuts against the adjusting piece; when the adjusting member is in the second posture, the spacer is disposed on the upper wall surface and abuts against the adjusting member.
In an optional embodiment, the guide seat is provided with a clamping groove, the clamping groove is provided with an upper wall surface and a lower wall surface which are opposite, the adjusting piece is at least partially positioned in the clamping groove, the adjusting piece is provided with a first side and a second side which are opposite, the distance from the axis of the guide wheel to the first side of the adjusting piece is smaller than that from the axis of the guide wheel to the second side of the adjusting piece, when the adjusting piece is in the first posture, the first side of the adjusting piece is abutted against the upper wall surface of the clamping groove, and the second side of the adjusting piece is abutted; when the regulating part is in the second posture, the second side of the regulating part is abutted to the upper wall surface of the clamping groove, and the first side is abutted to the lower wall surface of the clamping groove.
In an optional embodiment, the guide seat comprises two side plates which are arranged at intervals, the side plates form an upper wall surface and a lower wall surface of the clamping groove, each side plate is provided with a mounting hole, and the adjusting piece is connected to the mounting hole of at least one side plate through a bolt.
In an alternative embodiment, the guide wheel is connected with the adjusting piece through a shaft body, and the shaft body and the guide wheel are coaxially arranged; the adjusting element can rotate with the shaft body and/or the shaft body can rotate with the guide wheel.
In an alternative embodiment, the adjusting member is provided with a fitting hole into which an end portion of the shaft body is inserted.
In an alternative embodiment, the guide wheel mechanism has two adjusting members arranged at intervals, the guide wheel is located between the two adjusting members, and two ends of the guide wheel in the axial direction are respectively connected with the adjusting members in a rotating manner.
In a second aspect, the present application provides a drive device for an excavator, comprising a guide wheel mechanism according to any one of the preceding embodiments.
In a third aspect, the present application provides an excavator comprising the drive apparatus of the foregoing embodiments.
The beneficial effects of the embodiment of the application include, for example:
the application provides a guide wheel mechanism, including the guide holder, set up in the regulating part of guide holder and rotate the guide wheel of connecting in the regulating part, the regulating part has changeable first gesture and second gesture for the guide holder, and the axis of guide wheel is higher than the axis of guide wheel under the condition that the regulating part is in the second gesture under the condition that the regulating part is in the first gesture. Therefore, according to different kinds of track installation needs, adjust the height of regulating part to adjust the height of leading wheel, satisfy the installation demand of different tracks, make after installing different tracks, all have the stability and the comfort level of preferred. For example, the adjustment member is adjusted to a first attitude when the steel crawler is installed and to a second attitude when the rubber crawler is installed.
The driving device and the excavator provided by the embodiment of the application both comprise the guide wheel mechanism, so that the driving device and the excavator also have the advantage of being suitable for mounting different types of tracks.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic view of an adjustment member of a guide wheel mechanism in a first attitude according to a first embodiment of the present application;
FIG. 2 is a schematic view of an adjustment member of the guide wheel mechanism in a second attitude according to the first embodiment of the present application;
FIG. 3 is a schematic view of an adjustment member of the guide wheel mechanism in a first attitude according to a second embodiment of the present application;
FIG. 4 is a schematic view of an adjusting member of the guide wheel mechanism in a second attitude according to a second embodiment of the present application.
Icon: 100-a guide wheel mechanism; 110-a guide seat; 111-side plates; 112-card slot; 113-bolt; 120-an adjustment member; 121-mating holes; 122-a gasket; 130-a guide wheel; 131-shaft body.
Detailed Description
The drive device of the existing excavator is provided with a guide wheel, and the axis of the guide wheel is fixed and unadjustable. However, some excavators, especially mini-excavators or mini-excavators, sometimes need to be switched to and configured with different tracks, such as rubber tracks and steel tracks. But the requirements of different tracks on the structural part of the lower vehicle are not completely the same, the lower plane of the track below the end of the guide wheel can be almost horizontal to the ground when the rubber track is matched, and a certain small angle is needed when the steel track is matched. Because the center distance between the front wheel and the rear wheel of the lower vehicle is smaller in the small excavator, particularly the small excavator, if the guide wheels are designed according to the requirement of adapting to the structure of the steel track, the stability is influenced when the rubber track is installed; and if the adaptation requires to adorn the steel track according to the structure of rubber track then the vibration travelling comfort also can be influenced, consequently current guide wheel mechanism adaptability is poor, can not guarantee when the different tracks of installation, all has better stability and travelling comfort.
In order to solve the above-mentioned existing problems, embodiments of the present application provide a guide wheel mechanism, the height of the guide wheel mechanism is adjustable, so as to solve the problem of poor adaptability of the guide wheel mechanism in the prior art. In addition, the embodiment of the application also provides a driving device and an excavator comprising the guide wheel mechanism.
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which the present invention product is usually put into use, it is only for convenience of describing the present application and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present application may be combined with each other without conflict.
FIG. 1 is a schematic view of an adjusting member 120 of a guide wheel mechanism 100 in a first position according to a first embodiment of the present disclosure; fig. 2 is a schematic view of the adjusting member 120 of the guide wheel mechanism 100 in the second position according to the first embodiment of the present application. Referring to fig. 1 and 2, the present embodiment provides a guide wheel mechanism 100, which includes a guide base 110, an adjusting member 120 disposed on the guide base 110, and a guide wheel 130 rotatably connected to the adjusting member 120, wherein the adjusting member 120 has a first posture and a second posture which are switchable with respect to the guide base 110, and an axis of the guide wheel 130 is higher when the adjusting member 120 is in the first posture than when the adjusting member 120 is in the second posture. The height of the guide wheel 130 mounted on the adjusting member 120 is adjusted by providing the adjusting member 120 to be adjustable to have two different attitudes with respect to the guide housing 110. Thereby improving the adaptability of the entire guide wheel mechanism 100. For example, when the steel crawler is installed, the adjusting member 120 is adjusted to the first posture, and the guide wheel 130 is higher, so that the steel crawler at the guide wheel 130 has a certain inclination angle with the ground; when the rubber crawler is installed, the adjusting member 120 is adjusted to the second posture in which the height of the guide wheel 130 is low, so that the rubber crawler at the guide wheel 130 is close to the ground (or almost horizontal).
As shown in fig. 1 and 2, in an alternative embodiment, the guide seat 110 has a slot 112, the slot 112 has opposite upper and lower wall surfaces, the adjusting member 120 is at least partially located in the slot 112, the adjusting member 120 has opposite first and second sides, the axis of the guide wheel is located at a distance from the first side of the adjusting member 120 that is less than the distance from the second side of the adjusting member, when the adjusting member 120 is in the first posture, the first side of the adjusting member 120 abuts against the upper wall surface of the slot 112, and the second side abuts against the lower wall surface of the slot 112; when the adjusting member 120 is in the second posture, the vertical position of the adjusting member 120 is adjusted, so that the second side of the adjusting member 120 abuts against the upper wall surface of the slot 112, and the first side abuts against the lower wall surface of the slot 112.
In the present embodiment, the space formed between the upper wall surface and the lower wall surface of the card slot 112 may be set to just accommodate the adjuster 120. Optionally, the first side and the second side of the adjusting member 120 may be two planes, which can be attached to two walls of the slot 112 to increase the stability of the structure. Since the axis of the guide wheel is not located at the middle position of the adjusting member 120 in the vertical direction, but is eccentrically located, the axis of the guide wheel can be adjusted in the height direction by turning the adjusting member 120 to intermodulate the positions of the first side and the second side (i.e., to switch between the first posture and the second posture).
In this embodiment, the guide seat 110 includes two side plates 111 disposed at an interval, and a slot 112 is formed between the two side plates 111. The opposite sides of the two side plates 111 form the upper and lower wall surfaces of the card slot 112. Alternatively, both side plates 111 may be disposed horizontally, which may be integrally formed with the main body portion of the guide holder 110, welded, or connected by a fastener. Further, in order to ensure the strength of the guide base 110 and the stability of the guide wheel 130, the guide base 110 is made of steel.
As shown, the guide wheel 130 is connected to the adjusting member 120 through a shaft body 131, and the adjusting member 120 and the shaft body 131 can rotate. The shaft body 131 is disposed coaxially with the guide wheel 130.
Further alternatively, the adjusting member 120 is provided with a fitting hole 121, and the end of the shaft body 131 is inserted into the fitting hole 121 and can rotate within the fitting hole 121. That is, the shape of the fitting hole 121 is matched with the shape of the end of the shaft body 131, the cross section is circular, and the fitting hole 121 and the shaft body 131 can be directly connected in a rotating manner through a smooth wall surface or connected in a rotating manner through a bearing. In the embodiment of the present application, the shaft body 131 is a stepped shaft, the diameter of the end portion of the stepped shaft is small, and the formed stepped surface can abut against the adjusting member 120, so as to axially limit the displacement of the shaft body 131.
In alternative embodiments, the fitting hole 121 may also be formed on the end surface of the shaft body 131, so that the adjusting member 120 is partially inserted into the fitting hole 121; the shaft body 131 and the guide wheel 130 may be rotatable, but the shaft body 131 and the adjusting member 120 may not be rotatable, and of course, the shaft body 131 and the guide wheel 130, and the shaft body 131 and the adjusting member 120 may be rotatable.
In the embodiment of fig. 1 and 2, the distance L1 between the first side of the adjusting member 120 and the central axis of the fitting hole 121 should be smaller than the distance L2 between the second side and the central axis of the fitting hole 121, so that when the first side of the adjusting member 120 is in contact with the upper wall surface (in the first posture), the central axis of the fitting hole 121 is higher, and when the second side of the adjusting member 120 is in contact with the upper wall surface (in the second posture), the central axis of the fitting hole 121 is lower. Since the fitting hole 121 is coaxial with the rotating shaft and the guide wheel 130, the height of the central axis of the fitting hole 121 is the height of the axis of the guide wheel 130.
In order to provide the adjusting member 120 with a strong stability in the first posture or the second posture, optionally, each of the side plates 111 is provided with a mounting hole (not shown in the figure), and the adjusting member 120 is connected to the mounting hole of at least one of the side plates 111 by a bolt 113. Of course, the adjusting member 120 should be correspondingly provided with a screw hole or a non-threaded pin hole (the bolt 113 plays a role in positioning the pin shaft). In the present embodiment, the upper and lower sides of the adjusting member 120 are connected to the side plate 111 by the bolts 113 regardless of the first posture or the second posture. Of course, in alternative embodiments, only one of the side plates 111 may be provided with a mounting hole, and both sides of the adjusting member 120 may be provided with a screw hole or a pin hole, and the adjusting member 120 may be connected to one of the side plates 111 by the bolt 113 in both the first posture and the second posture. Of course, in the embodiment of the present application, the bolt 113 is not the only way to connect the side plate 111 and the adjusting member 120, and the stability of the adjusting member 120 may be ensured by other ways.
As shown in fig. 1 and 2, in the present embodiment, the guide wheel mechanism 100 has two adjusting members 120 spaced apart from each other, the guide wheel 130 is located between the two adjusting members 120, and both ends of the guide wheel 130 in the axial direction are rotatably connected to the adjusting members 120, respectively.
Of course, the manner of adjusting the height of the guide wheel 130 by the adjusting member 120 is not limited to the embodiment of fig. 1 and 2. FIG. 3 is a schematic view of the adjusting member 120 of the guide wheel mechanism 100 in a first position according to the second embodiment of the present application; fig. 4 is a schematic view of the adjusting member 120 of the guide wheel mechanism 100 in the second position according to the second embodiment of the present application. Referring to fig. 3 and 4, in the present embodiment, the structure of the adjusting member 120 is adjusted based on the embodiment shown in fig. 1 and 2. Optionally, in the height direction, the size of the adjusting member 120 is smaller than that of the slot 112, and the adjusting member 120 is selectively connected to or spaced apart from the upper wall surface of the slot 112 to adjust the height of the guide wheel 130; the adjuster 120 is connected to the upper wall surface of the card slot 112 in the first posture and is connected to be spaced apart from the upper wall surface of the card slot 112 in the second posture.
In the embodiment of fig. 1 and 2, the height of the upper side and the lower side of the adjusting member 120 is constant in two postures, while the embodiment of fig. 3 and 4 realizes the overall height adjustment of the adjusting member 120. In this way, it is equivalent to make the installation height position of the adjusting member 120 on the guide base 110 adjustable, and thus the height of the guide wheel 130 connected to the adjusting member 120 adjustable.
As shown in fig. 3 and 4, in order to increase the stability of the adjusting member 120, the guide wheel mechanism 100 further includes a pad 122, the pad 122 is selectively disposed on the upper wall surface or the lower wall surface, and when the adjusting member 120 is in the first posture, the pad 122 is disposed on the lower wall surface and abuts against the adjusting member 120 (see fig. 3); when the adjuster 120 is in the second posture, the spacer 122 is disposed on the upper wall surface and abuts the adjuster 120 (see fig. 4). By arranging the gasket 122, the virtual position of the clamping groove 112 not occupied by the adjusting piece 120 is filled, a certain supporting (or abutting) effect is realized on the adjusting piece 120, and the longitudinal deviation of the adjusting piece 120 is avoided.
In the embodiments of fig. 3 and 4, the connection manner between the guide wheel 130 and the connection member, the structure of the guide seat 110, and the like can refer to the embodiments of fig. 1 and 2, and are not repeated herein.
In this embodiment, the slot 112 may be a rail slot extending along a direction perpendicular to the display plane, and the adjusting member 120 may be adjusted and positioned in the slot 112 along the direction perpendicular to the display plane.
The embodiment of the present application further provides a driving device (not shown in the figure), which can be applied to an excavator, the driving device includes the guide wheel mechanism 100, the track, the driving wheel and the driving member provided in the embodiment of the present application, the track is sleeved on the guide wheel 130 of the driving wheel and the guide wheel mechanism 100, and the driving member is used for driving the driving wheel to rotate. The track of the driving device can be a steel track or a rubber track, and when the steel track is installed, the adjusting piece 120 of the guide wheel mechanism 100 is in the first posture, and the guide wheel 130 is higher; when the rubber crawler is mounted, the adjuster 120 of the leader mechanism is brought into the second attitude with the position of the leader wheel 130 lowered. In this way, the height of the guide wheel 130 can be adjusted as needed when the drive device is equipped with different crawler belts.
The embodiment of the application also provides an excavator, which comprises the driving device provided by the embodiment of the application.
In summary, the present application provides a guide wheel mechanism 100, which includes a guide base 110, an adjusting member 120 disposed on the guide base 110, and a guide wheel 130 rotatably connected to the adjusting member 120, wherein the adjusting member 120 has a first posture and a second posture which are switchable with respect to the guide base 110, and an axis of the guide wheel 130 is higher when the adjusting member 120 is in the first posture than when the adjusting member 120 is in the second posture. Therefore, according to the installation needs of different kinds of tracks, the height of the adjusting piece 120 is adjusted, so that the height of the guide wheel 130 is adjusted, the installation needs of different tracks are met, and the installation requirements of different tracks are better in stability and comfort. For example, the adjustment member 120 is adjusted to a first attitude when the steel track is installed, and the adjustment member 120 is adjusted to a second attitude when the rubber track is installed.
The driving device and the excavator provided by the embodiment of the application both comprise the guide wheel mechanism 100, so that the driving device and the excavator also have the advantage of being suitable for mounting different types of tracks.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The guide wheel mechanism is applied to a driving device of an excavator and is characterized by comprising a guide seat, an adjusting piece arranged on the guide seat and a guide wheel rotatably connected to the adjusting piece, wherein the adjusting piece has a first posture and a second posture which can be switched relative to the guide seat, and the axis of the guide wheel is higher when the adjusting piece is in the first posture than when the adjusting piece is in the second posture.
2. The guide wheel mechanism of claim 1, wherein the guide block has a slot having opposing upper and lower walls, the adjustment member being at least partially positioned within the slot and having a dimension less than a dimension of the slot in the height direction, the adjustment member being selectively attachable to or spaced from the upper wall of the slot to adjust the height of the guide wheel; the adjusting piece is connected with the upper wall surface of the clamping groove under the condition of the first posture and is spaced from the upper wall surface of the clamping groove under the condition of the second posture.
3. The guide wheel mechanism according to claim 2, further comprising a spacer that is selectively provided on the upper wall surface or the lower wall surface, the spacer being provided on the lower wall surface and abutting against the adjuster when the adjuster is in the first posture; when the adjusting member is in the second posture, the spacer is disposed on the upper wall surface and abuts against the adjusting member.
4. The guide wheel mechanism of claim 1, wherein the guide block has a pocket with opposing upper and lower wall surfaces, the adjustment member is at least partially positioned within the pocket, the adjustment member has opposing first and second sides, the axis of the guide wheel is less from the first side of the adjustment member than from the second side, the first side of the adjustment member abuts the upper wall surface of the pocket and the second side abuts the lower wall surface of the pocket when the adjustment member is in the first position; when the adjusting piece is in the second posture, the second side of the adjusting piece is abutted to the upper wall surface of the clamping groove, and the first side of the adjusting piece is abutted to the lower wall surface of the clamping groove.
5. The guide wheel mechanism as claimed in any one of claims 2 to 4, wherein the guide seat comprises two side plates arranged at intervals, the side plates form an upper wall surface and a lower wall surface of the slot, each side plate is provided with a mounting hole, and the adjusting member is connected to the mounting hole of at least one of the side plates through a bolt.
6. Guide wheel mechanism according to any of claims 1-4, characterized in that the guide wheel is connected with the adjusting piece by means of a shaft body, which is arranged coaxially with the guide wheel; the adjusting piece and the shaft body can rotate, and/or the shaft body and the guide wheel can rotate.
7. The guide wheel mechanism according to claim 6, wherein the adjusting member is provided with a fitting hole into which an end portion of the shaft body is inserted.
8. The guide wheel mechanism according to any one of claims 1 to 4, wherein the guide wheel mechanism has two spaced apart adjustment members, the guide wheel is located between the two adjustment members, and both ends of the guide wheel in the axial direction are rotatably connected to the adjustment members, respectively.
9. A drive device for an excavator, comprising the guide wheel mechanism of any one of claims 1 to 8.
10. An excavator comprising the drive apparatus of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011339163.4A CN112389555A (en) | 2020-11-25 | 2020-11-25 | Guide wheel mechanism, drive device, and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011339163.4A CN112389555A (en) | 2020-11-25 | 2020-11-25 | Guide wheel mechanism, drive device, and excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112389555A true CN112389555A (en) | 2021-02-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011339163.4A Pending CN112389555A (en) | 2020-11-25 | 2020-11-25 | Guide wheel mechanism, drive device, and excavator |
Country Status (1)
| Country | Link |
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| CN (1) | CN112389555A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114179926A (en) * | 2021-12-28 | 2022-03-15 | 徐州徐工挖掘机械有限公司 | Guide wheel, crawler system and engineering machinery |
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| CN114179926A (en) * | 2021-12-28 | 2022-03-15 | 徐州徐工挖掘机械有限公司 | Guide wheel, crawler system and engineering machinery |
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