CN215590885U - Caterpillar track unit, caterpillar track and engineering machinery - Google Patents
Caterpillar track unit, caterpillar track and engineering machinery Download PDFInfo
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- CN215590885U CN215590885U CN202121991175.5U CN202121991175U CN215590885U CN 215590885 U CN215590885 U CN 215590885U CN 202121991175 U CN202121991175 U CN 202121991175U CN 215590885 U CN215590885 U CN 215590885U
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Abstract
The utility model relates to the technical field of engineering machinery, in particular to a caterpillar track unit, a caterpillar track and engineering machinery. Because the cross-sectional area of the connecting shaft section is gradually reduced from the end connected with the middle shaft section to the end far away from the middle shaft section, and the connecting shaft section is in interference fit connection with the first connecting hole, the pin shaft cannot move leftwards or rightwards relative to the caterpillar track section, when the caterpillar track unit is applied to a caterpillar track, the stability and the reliability of connection can be realized to the maximum extent on the basis of ensuring the connection strength, and the phenomenon that the caterpillar track is subjected to pin movement in the walking process is prevented.
Description
Technical Field
The utility model relates to the technical field of engineering machinery, in particular to a caterpillar track unit, a caterpillar track and engineering machinery.
Background
The crawler is an important component of a traveling device of hydraulic engineering machinery, and is widely applied to hydraulic excavators, pavers, slag raking machines, bulldozers and the like. The main function of the track is to convert the driving torque and rotary motion transmitted by the engine to the driving wheels into the driving force required by the machine to walk and to support the whole machine and the load to work. The caterpillar is composed of caterpillar plates, caterpillar tracks and the like, and the caterpillar plates are connected through bolts to form a caterpillar chain ring.
Most of caterpillar tracks in the existing caterpillar tracks are closed-loop chain links formed by pressing and assembling caterpillar track sections in pairs through pin shafts, the pin shafts are ordinary straight shafts, shaft holes in the caterpillar track sections are straight holes, and when an excavator turns, the caterpillar tracks are subjected to lateral force, and pin-shifting faults are easy to occur.
SUMMERY OF THE UTILITY MODEL
Therefore, the technical problem to be solved by the present invention is to overcome the defect that the prior art excavator is easy to generate pin play when steering, and to provide a caterpillar unit, a caterpillar and an engineering machine which can avoid the pin play.
In order to solve the technical problem, the caterpillar track unit provided by the utility model comprises two caterpillar track sections which are oppositely arranged and a pin shaft for connecting the two caterpillar track sections, wherein the pin shaft is provided with a middle shaft section and connecting shaft sections which are positioned at two ends of the middle shaft section, the cross section area of each connecting shaft section is gradually reduced from one end connected with the middle shaft section to one end far away from the middle shaft section, the caterpillar track sections are provided with first connecting holes matched with the connecting shaft sections, and the connecting shaft sections are connected with the first connecting holes in an interference fit manner.
Optionally, the cross section of the connecting shaft section is circular, and correspondingly, the first connecting hole is in a circular truncated cone shape.
Optionally, the taper of the connecting shaft section is A, and A is more than or equal to 3 degrees and less than or equal to 10 degrees;
and/or the length of the connecting shaft section is not less than the depth of the first connecting hole.
Optionally, each caterpillar link has a first end and a second end, the first connecting hole is formed in the first end, the second end is provided with a second connecting hole, when two adjacent caterpillar link units are connected, the first connecting hole of the caterpillar link of one caterpillar link unit is opposite to the second connecting hole of the caterpillar link of the other caterpillar link unit, the aperture of the second connecting hole is larger than that of the first connecting hole, the caterpillar link unit further comprises a pin sleeve, the pin sleeve is sleeved outside the middle shaft section, and two ends of the pin sleeve are connected with the second connecting holes in a matched manner.
Optionally, the pin sleeve is clearance fit with the intermediate shaft section.
Optionally, a lubricating layer is arranged between the pin sleeve and the middle shaft section.
Optionally, the caterpillar link first end department still is equipped with the mounting hole, the axis of mounting hole with the axis collineation of first connecting hole, just the aperture of mounting hole is greater than the aperture of first connecting hole, the mounting hole with form the step face between the first connecting hole, when two adjacent caterpillar units are connected, the mounting hole with the second connecting hole is relative, the round pin cover with be equipped with the sealing member between the step face.
Optionally, the seal is W-shaped in cross-section.
The utility model also provides a crawler belt comprising the caterpillar track unit.
The utility model also provides engineering machinery comprising the crawler belt.
The technical scheme of the utility model has the following advantages:
according to the caterpillar track unit provided by the utility model, as the cross-sectional area of the connecting shaft section is gradually reduced from the end connected with the middle shaft section to the end far away from the middle shaft section, and the connecting shaft section is in interference fit connection with the first connecting hole, the pin shaft cannot move leftwards or rightwards relative to the caterpillar track section, when the caterpillar track unit is applied to a caterpillar track, the stability and reliability of connection can be realized to the maximum extent on the basis of ensuring the connection strength, the phenomenon of pin fleeing of the caterpillar track in the walking process is prevented, and meanwhile, compared with the connection mode in the prior art that the pin shaft and the caterpillar track section are in interference fit through the straight shaft and the straight hole, the interference magnitude can be reduced, and the service lives of the caterpillar track section and the pin shaft are further prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a sectional view of a caterpillar unit provided in embodiment 1 of the present invention;
fig. 2 is a partially enlarged view of fig. 1.
Description of reference numerals:
1. a caterpillar link; 2. a pin shaft; 201. a middle shaft section; 202. connecting the shaft sections; 3. a pin bush; 4. a seal member; 401. a first seal ring portion; 402. a second seal ring portion; 403. a first angled seal section; 404. a second angled seal segment.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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 invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The crawler is an important component of a traveling device of hydraulic engineering machinery, and is widely applied to hydraulic excavators, pavers, slag raking machines, bulldozers and the like. The main function of the track is to convert the driving torque and rotary motion transmitted by the engine to the driving wheels into the driving force required by the machine to walk and to support the whole machine and the load to work. The caterpillar is composed of caterpillar plates, caterpillar tracks and the like, and the caterpillar plates are connected through bolts to form a caterpillar chain ring.
Most of caterpillar tracks in the existing caterpillar tracks are closed-loop chain links formed by pressing and assembling caterpillar track sections in pairs through pin shafts, the pin shafts are ordinary straight shafts, shaft holes in the caterpillar track sections are straight holes, and when an excavator turns, the caterpillar tracks are subjected to lateral force, and pin-shifting faults are easy to occur.
For this reason, the present embodiment provides a caterpillar unit capable of preventing the occurrence of a pin-running phenomenon when the caterpillar unit is applied to a track of an excavator.
In one embodiment, as shown in fig. 1, the caterpillar unit includes two caterpillar sections 1 disposed oppositely and a pin 2 connecting the two caterpillar sections 1, the pin 2 has a middle shaft section 201 and a connecting shaft section 202 located at two ends of the middle shaft section 201, a cross-sectional area of the connecting shaft section 202 is gradually reduced from one end connected with the middle shaft section 201 to one end far away from the middle shaft section 201, the caterpillar section 1 is provided with a first connecting hole adapted to the connecting shaft section 202, and the connecting shaft section 202 is connected with the first connecting hole in an interference fit manner.
In this embodiment, since the cross-sectional area of the connecting shaft section 202 is gradually reduced from the end connected with the middle shaft section 201 to the end far away from the middle shaft section 201, and the connecting shaft section 202 is connected with the first connecting hole in an interference fit manner, the pin shaft 2 cannot move leftward or rightward relative to the caterpillar link 1, when the caterpillar unit is applied to a caterpillar, the stability and reliability of connection can be realized to the maximum extent on the basis of ensuring the connection strength, and the phenomenon of pin fleeing of the caterpillar during the walking process is prevented, meanwhile, compared with the connection mode in the prior art in which the pin shaft 2 and the caterpillar link 1 are in the interference fit manner through a straight shaft and a straight hole, the interference amount can be reduced, and the service lives of the caterpillar link 1 and the pin shaft 2 are further prolonged.
On the basis of the above embodiment, in a preferred embodiment, the connecting shaft section 202 has a circular cross section, and correspondingly, the first connecting hole has a truncated cone shape. In this embodiment, because the cross section of connecting shaft section 202 is circular, the diameter of connecting shaft section 202 reduces gradually from the one end that links to each other with middle shaft section 201 to the one end of keeping away from middle shaft section 201, adds man-hour, can utilize lathe work, convenient processing, and connecting shaft section 202 and caterpillar link 1 cooperation back of being connected, the circumference atress of connecting shaft section 202 is even, can further increase the life of round pin axle 2. In an alternative embodiment, the cross-section of the connecting shaft section 202 is non-circular, for example, the connecting shaft section 202 is formed with two inclined surfaces symmetrical with respect to the axis of the connecting shaft, so that the cross-sectional area of the connecting shaft section 202 decreases from the end connected with the middle shaft section 201 to the end far away from the middle shaft section 201, in which embodiment, the cross-section of the connecting shaft section 202 includes two opposite straight sides and two arc-shaped sides connecting the two straight sides. In another alternative embodiment, connecting shaft segment 202 is rectangular in cross-section such that the cross-sectional area of connecting shaft segment 202 decreases from the end connected to intermediate shaft segment 201 to the end distal from intermediate shaft segment 201.
In a preferred embodiment, the taper of the connecting shaft section 202 is A, 3 DEG.ltoreq.A.ltoreq.10 DEG, based on the above-described embodiment. In this embodiment, by setting a reasonable taper, the diameter of the connecting shaft section 202 is not too small, and the stability and reliability of connection can be realized to the maximum extent on the basis of ensuring the connection strength. The specific size of the taper can be selected by the user according to actual conditions. Specifically, in one embodiment, the taper of the connecting shaft segment 202 may be selected to be 3 °. In an alternative embodiment, the taper of the connecting shaft segment 202 may be selected to be 6 °. In another alternative embodiment, the taper of the connecting shaft segment 202 is 10 °. Of course, in other alternative embodiments, the taper of the connecting shaft segment 202 may be less than 3 ° or greater than 10 °.
In addition to the above embodiments, in a preferred embodiment, the length of the connecting shaft section 202 is not less than the depth of the first connecting hole. In this embodiment, a large contact area of the pin 2 with the track link 1 can be ensured, thereby ensuring the connection length of the pin 2 with the track link 1. Specifically, in one embodiment, the length of the connecting shaft segment 202 is equal to the depth of the first connecting bore. In particular, in another embodiment, the length of the connecting shaft segment 202 is greater than the depth of the first connecting bore. In other alternative embodiments, the length of the connecting shaft section 202 may be made slightly less than the depth of the first connecting bore.
On the basis of the above embodiment, in a preferred embodiment, each track link 1 has a first end and a second end, the first connecting hole is arranged at the first end, the second end is provided with a second connecting hole, when two adjacent track units are connected, the first connecting hole of the track link 1 of one track unit is opposite to the second connecting hole of the track link 1 of the other track unit, the aperture of the second connecting hole is larger than that of the first connecting hole, the track unit further includes a pin sleeve 3, the pin sleeve 3 is sleeved outside the middle shaft segment 201, and two ends of the pin sleeve 3 are connected with the second connecting hole in a matching manner. In this embodiment, when two adjacent caterpillar units are connected, the second end of the caterpillar link 1 of one caterpillar unit is located inside the first end of the caterpillar link 1 of the other caterpillar unit, the pin sleeve 3 is sleeved outside the middle shaft section 201 of the pin shaft 2, two ends of the pin shaft 2 penetrate through the second connecting hole and the first connecting hole, the pin shaft 2 is fixedly connected with two opposite caterpillar links 1 of one caterpillar unit, and the pin sleeve 3 can rotate relative to the pin shaft 2, so that the other caterpillar unit rotates relative to the one caterpillar unit.
In addition to the above embodiments, in a preferred embodiment, the pin sleeve 3 is clearance-fitted to the central shaft section 201. In this embodiment, due to the clearance fit between the pin sleeve 3 and the middle shaft section 201, it can be ensured that the pin sleeve 3 can rotate relative to the pin shaft 2, thereby realizing the relative rotation between two adjacent caterpillar units.
In addition to the above embodiments, in a preferred embodiment, a lubricating layer is provided between the pin sleeve 3 and the intermediate shaft segment 201. In this embodiment, the setting of lubricating layer can reduce the frictional resistance between round pin cover 3 and round pin axle 2, can reduce the wearing and tearing of the inner wall of round pin cover 3 and the outer wall of round pin axle 2, can prolong the life of round pin axle 2 and round pin cover 3.
In one embodiment, the lubricating layer is grease, and specifically, the grease may be applied to the outer wall of the pin 2 during installation, or the grease may be injected between the pin 2 and the pin 3 by injecting after the pin 3 is sleeved outside the pin 2.
On the basis of the above embodiment, in a preferred embodiment, as shown in fig. 2, a mounting hole is further provided at the first end of the track link 1, the axis of the mounting hole is collinear with the axis of the first connecting hole, the aperture of the mounting hole is larger than that of the first connecting hole, a step surface is formed between the mounting hole and the first connecting hole, when two adjacent track units are connected, the mounting hole is opposite to the second connecting hole, and a sealing member 4 is provided between the pin sleeve 3 and the step surface. In this embodiment, the seal 4 is provided to seal the gap between the pin bush 3 and the pin shaft 2, and to prevent the lubricant layer between the pin bush 3 and the intermediate shaft segment 201 from leaking.
On the basis of the above embodiments, in a preferred embodiment, the cross-section of the seal 4 is W-shaped. In this embodiment, the sealing member 4 is a W-shaped sealing ring, and includes a first sealing ring portion 401 abutting against a step surface, a second sealing ring portion 402 abutting against an end portion of the pin bushing 3, a first inclined sealing section 403 connected to an inner end of the first sealing ring portion 401 and extending obliquely outward, and a second inclined sealing section 404 connected to an inner end of the second sealing ring portion 402 and extending obliquely outward, where the first inclined sealing section 403 and the second inclined sealing section 404 intersect, and a longitudinal cross-sectional area of the first inclined sealing section 403 and the second inclined sealing section 404 is smaller than a longitudinal cross-sectional area of the first sealing ring portion 401 and the second sealing ring portion 402, so that when the pin bushing 3 is moved by a force, the sealing member 4 can be pressed, and the sealing member 4 enables the pin bushing 3 to have a certain axial movement margin, thereby facilitating rotation of the track. In an alternative embodiment, the seal 4 is a conventional O-ring seal.
Example 2
The present embodiment provides a crawler belt including the caterpillar unit provided in the above embodiment.
The track that this embodiment provided, because every caterpillar link unit is including two caterpillar links 1 that set up relatively and the round pin axle 2 of connecting two caterpillar links 1, round pin axle 2 has middle shaft part 201 and is located the connecting shaft part 202 at middle shaft part 201 both ends, the cross-sectional area of connecting shaft part 202 reduces gradually from the one end that links to each other with middle shaft part 201 to the one end of keeping away from middle shaft part 201, caterpillar link 1 is equipped with the first connecting hole with connecting shaft part 202 looks adaptation, connecting shaft part 202 is connected with first connecting hole interference fit. Because the cross-sectional area of the connecting shaft section 202 is gradually reduced from the end connected with the middle shaft section 201 to the end far away from the middle shaft section 201, and the connecting shaft section 202 is connected with the first connecting hole in an interference fit manner, the pin shaft 2 cannot move leftwards or rightwards relative to the caterpillar track section 1, when the caterpillar track unit is applied to a caterpillar track, the stability and the reliability of connection can be realized to the maximum extent on the basis of ensuring the connection strength, the phenomenon that the caterpillar track is subjected to pin fleeing in the walking process is prevented, and meanwhile, compared with a connection mode in the prior art that the pin shaft 2 and the caterpillar track section 1 are in interference fit through a straight shaft and a straight hole, the interference magnitude can be reduced, and the service lives of the caterpillar track section 1 and the pin shaft 2 are further prolonged.
Specifically, in an embodiment, the caterpillar units are sequentially connected end to form a caterpillar, when two adjacent caterpillar units are connected, the second end of the caterpillar link 1 of one caterpillar unit is located on the inner side of the first end of the caterpillar link 1 of the other caterpillar unit, the pin sleeve 3 is sleeved on the outer side of the middle shaft section 201 of the pin shaft 2, the two ends of the pin shaft 2 penetrate through the second connecting hole and the first connecting hole, the pin shaft 2 is fixedly connected with the two opposite caterpillar links 1 of the one caterpillar unit, and the pin sleeve 3 can rotate relative to the pin shaft 2, so that the other caterpillar unit rotates relative to the one caterpillar unit.
Example 3
The embodiment provides a construction machine including the crawler belt provided in embodiment 2.
The engineering machinery can be an excavator, a paver, a slag raking machine, a bulldozer and the like.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.
Claims (10)
1. The utility model provides a caterpillar unit, its characterized in that, including two caterpillar sections (1) that set up relatively and connect two round pin axle (2) of caterpillar section (1), round pin axle (2) have middle shaft part (201) and are located connecting shaft part (202) at middle shaft part (201) both ends, the cross-sectional area of connecting shaft part (202) from with the one end that middle shaft part (201) link to each other to keeping away from the one end of middle shaft part (201) reduces gradually, caterpillar section (1) be equipped with the first connecting hole of connecting shaft part (202) looks adaptation, connecting shaft part (202) with first connecting hole interference fit is connected.
2. Caterpillar unit according to claim 1, characterized in that the cross-section of the connecting shaft section (202) is circular, correspondingly the first connecting hole is truncated cone-shaped.
3. A caterpillar unit according to claim 2, characterized in that the conicity of the connecting shaft section (202) is a, 3 ° ≦ a ≦ 10 °;
and/or the length of the connecting shaft section (202) is not less than the depth of the first connecting hole.
4. A track unit according to any of claims 1-3, characterized in that each track link (1) has a first end and a second end, the first connecting hole is provided at the first end, the second end is provided with a second connecting hole, when two adjacent track units are connected, the first connecting hole of the track link (1) of one track unit is opposite to the second connecting hole of the track link (1) of the other track unit, the second connecting hole has a larger aperture than the first connecting hole, the track unit further comprises a pin sleeve (3), the pin sleeve (3) is sleeved outside the middle shaft section (201), and two ends of the pin sleeve (3) are connected with the second connecting hole in a matching manner.
5. Caterpillar track unit according to claim 4, characterized in that the pin bushing (3) is clearance fitted with the intermediate shaft section (201).
6. Caterpillar unit according to claim 5, characterized in that a lubricating layer is provided between the pin sleeve (3) and the intermediate shaft section (201).
7. A caterpillar unit according to claim 4, wherein the first end of the caterpillar link (1) is further provided with a mounting hole, the axis of the mounting hole is collinear with the axis of the first connecting hole, the aperture of the mounting hole is larger than that of the first connecting hole, a step surface is formed between the mounting hole and the first connecting hole, when two adjacent caterpillar units are connected, the mounting hole is opposite to the second connecting hole, and a sealing member (4) is arranged between the pin sleeve (3) and the step surface.
8. Caterpillar unit according to claim 7, characterized in that the cross-section of the seal (4) is W-shaped.
9. A track comprising a caterpillar unit according to any one of claims 1 to 8.
10. A working machine comprising a track as claimed in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121991175.5U CN215590885U (en) | 2021-08-23 | 2021-08-23 | Caterpillar track unit, caterpillar track and engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121991175.5U CN215590885U (en) | 2021-08-23 | 2021-08-23 | Caterpillar track unit, caterpillar track and engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215590885U true CN215590885U (en) | 2022-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121991175.5U Active CN215590885U (en) | 2021-08-23 | 2021-08-23 | Caterpillar track unit, caterpillar track and engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215590885U (en) |
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2021
- 2021-08-23 CN CN202121991175.5U patent/CN215590885U/en active Active
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