Anti-collision walking speed reducer and hydraulic excavator

Abstract

The anti-collision walking speed reducer comprises a speed reducer body, a rear end cover is arranged at the end of the speed reducer body, a protective cover is arranged outside the rear end cover, the protective cover is fixed to the rear end cover and the speed reducer body through protective cover installation bolts, and a cushion block is arranged between the protective cover and the rear end cover. The rear end cover is provided with an oil filling port, an oil discharging port and an oil level observation port, and a round hole I, a round hole II and a round hole III are formed in the corresponding positions of the protective cover. According to the anti-collision walking speed reducer and the hydraulic excavator, anti-collision of the walking speed reducer can be achieved, the speed reducer shell and exposed bolts of the speed reducer are mainly protected, the problem that the walking speed reducer fails due to the fact that the speed reducer is impacted by foreign objects is solved, and meanwhile the protective cover can be independent of the speed reducer body and is convenient to use. After the protective cover is detached, it can still be guaranteed that precision parts in the speed reducer are not exposed, completeness of the speed reducer is guaranteed, replacement of the protective cover when the protective cover is damaged is facilitated, and therefore personnel and property safety can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of construction machinery, in particular to an anti-collision traveling speed reducer and a hydraulic excavator. Background Technique

[0002] The traveling speed reducer is an execution element for the traveling of an excavator and is a device used for the track drive of an excavator. The traveling speed reducer is an ideal driving device for wheeled or tracked vehicles and other mobile equipment. The traveling speed reducer has withstood the test in a harsh environment, showing its high performance. However, when it is in a harsh working environment for a long time, a series of measures need to be taken to ensure its stable operation and extend its service life.

[0003] At present, in a harsh working environment, the damage of the traveling speed reducer caused by the impact of external objects such as stones is one of the main ways for the traveling speed reducer to fail. The traveling speed reducer with planetary carrier output is located inside the track of the hydraulic excavator, and the existing traveling speed reducer with ring gear output is exposed outside the track and has no protection. Therefore, corresponding protective measures need to be taken to protect the traveling speed reduction device, improve the ability of the traveling speed reduction device to cope with a harsh environment, prevent it from being damaged, and at the same time, the convenience of regular maintenance and replacement needs to be considered to facilitate the subsequent operation of the staff. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to overcome the above-mentioned deficiencies of the prior art.

[0005] The utility model provides an anti-collision traveling speed reducer, which includes a speed reducer body. A rear end cover is provided at the end of the speed reducer body. A protective cover is provided outside the rear end cover. The protective cover is fixed on the rear end cover and the speed reducer body through protective cover mounting bolts. A spacer block is provided between the protective cover and the rear end cover, and the spacer block is fixed through the protective cover mounting bolts. An oil filling port, an oil draining port and an oil level observation port are provided on the rear end cover, and circular holes Ⅰ, Ⅱ and Ⅲ are provided at corresponding positions on the protective cover.

[0006] Furthermore, the rear end cover is fixed on the speed reducer body through rear end cover mounting bolts.

[0007] The rear end cover and the protective cover are respectively provided with rear end cover mounting bolt through holes and protective cover mounting bolt through holes for cooperating with the protective cover mounting bolts. Both the rear end cover mounting bolt through holes and the protective cover mounting bolt through holes are countersunk holes, and the countersunk holes of the rear end cover mounting bolt through holes are used for placing the spacer block.

[0008] The depth of the countersunk hole of the rear end cover mounting bolt through hole is less than the height of the spacer block. After the protective cover is installed, there is a clearance fit between the outer end face of the rear end cover of the rear end cover and the protective cover.

[0009] The number of through holes for the rear end cover installation bolts is an integer multiple of the number of through holes for the protective cover installation bolts.

[0010] The fuel filling port and the oil drain port are symmetrically arranged along the diameter direction of the rear end cover, and the oil level observation port is arranged on one side of the fuel filling port and the oil drain port.

[0011] The fuel filling port, the oil drain port, and the oil level observation port are respectively provided with a fuel filling plug, an oil drain plug, and a liquid level observation plug, and the thread specifications of the fuel filling port, the oil drain port, and the oil level observation port are kept consistent.

[0012] The protective cover is a hollow ring, and a stop collar for wrapping the rear end cover is provided on the side of the protective cover close to the reducer body, and a groove for placing a cushion block is provided on the inner side of the stop collar.

[0013] A plurality of lifting holes are provided on the protective cover, and the lifting holes are the same as the protective cover installation bolts in terms of thread size specifications.

[0014] The cushion block is provided with a cushion block through hole, and the inner diameter of the cushion block through hole is larger than the outer diameter of the protective cover installation bolt.

[0015] The present utility model also provides a hydraulic excavator, including an anti-collision traveling reducer as described above.

[0016] The anti-collision traveling reducer and the hydraulic excavator of the present utility model can achieve the anti-collision of the traveling reducer, mainly protecting the reducer housing and the exposed bolts of the reducer, reducing the problem that the traveling reducer fails due to external objects hitting the reducer. At the same time, the protective cover can be independent of the reducer body. After the protective cover is disassembled, the precision parts inside the reducer can still be ensured not to be exposed, ensuring the integrity of the reducer, facilitating the replacement when the protective cover is damaged, and thus ensuring the safety of personnel and property. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings, as a part of the present utility model, are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model, but do not constitute an improper limitation to the present utility model. Obviously, the drawings in the following description are only some embodiments, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0018] In the drawings:

[0019] Figure 1 is the overall structure sectional view of the present utility model;

[0020] Figure 2 and Figure 3 is Figure 1 the partial sectional view of;

[0021] Figure 4 This is the rear view of the speed reducer of the present utility model;

[0022] Figure 5 This is the front view of the rear end cover of the present utility model;

[0023] Figure 6 This is the sectional view of the rear end cover of the present utility model;

[0024] Figure 7 This is the structural schematic diagram of the protective cover of the present utility model;

[0025] Figure 8 and Figure 9 These are the sectional views of the protective cover of the present utility model at different angles;

[0026] Figure 10 This is the structural schematic diagram of the cushion block of the present utility model.

[0027] In the figure: 1. Speed reducer body, 2. Second-stage internal gear ring, 3. First-stage internal gear ring, 4. Rear end cover, 5. Protective cover, 6. Cushion block, 7. Rear end cover mounting bolt, 8. Protective cover mounting bolt, 9. Oil drain plug, 10. Oil filling plug, 11. Liquid level observation plug, 401. Rear end cover mounting bolt through hole, 402. Oil drain port, 403. Oil filling port, 404. Oil level observation port, 405. Outer end face of the rear end cover, 501. Protective cover mounting bolt through hole, 502. Jacking hole, 503. Round hole Ⅰ, 504. Round hole Ⅱ, 505. Round hole Ⅲ, 506. Groove, 507. Stopper ring, 508. Inner end face of the protective cover, 601. Cushion block through hole.

[0028] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but are not used to limit the scope of the present utility model.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the above terms can be understood according to specific circumstances in the present utility model as Figures 1 to 10 As shown in Figures 1 to 10 , an anti-collision walking speed reducer includes a speed reducer body 1. A rear end cover 4 is provided at the end of the speed reducer body 1. A protective cover 5 is provided outside the rear end cover 4. The protective cover 5 is fixed to the rear end cover 4 and the speed reducer body 1 by protective cover mounting bolts 8. A spacer 6 is provided between the protective cover 5 and the rear end cover 4. The spacer 6 is fixed by the protective cover mounting bolts 8. The rear end cover 4 is provided with an oil filling port 403, an oil drain port 402, and an oil level observation port 404. Corresponding positions on the protective cover 5 are provided with circular hole I 503, circular hole II 504, and circular hole III 505. In the anti-collision walking speed reducer of the present utility model, a protective cover is provided at the end of the speed reducer body, which can effectively protect the speed reducer body during operation and prevent the speed reducer body from being damaged. Specifically, the protective cover is connected to the rear end cover by cover mounting bolts and then fixed to the speed reducer body, or directly fixed to the rear end cover. A spacer is provided between the protective cover and the rear end cover, which can play a shock-absorbing effect and effectively reduce the impact of the rear end cover and the speed reducer body being hit by foreign objects during operation. At the same time, circular hole I, circular hole II, and circular hole III are provided on the protective cover, corresponding to the oil filling port, oil drain port, and oil level observation port on the rear end cover, without affecting the use function of the rear end cover. In addition, the rear end cover is fixed to the speed reducer body by rear end cover mounting bolts 7. The installation positions of the rear end cover mounting bolts on the rear end cover are staggered, and at the same time, the lengths of the protective cover mounting bolts and the rear end cover mounting bolts are different. The protective cover can be independent of the speed reducer body. After the protective cover is disassembled, the precision parts inside the speed reducer body can still be kept from being exposed, ensuring the integrity of the speed reducer and facilitating the replacement when the protective cover is damaged.

[0032] As Figures 1 to 6 As shown in Figures 1 to 6 , in an anti-collision walking speed reducer, the rear end cover 4 and the protective cover 5 are respectively provided with rear end cover mounting bolt through holes 401 and protective cover mounting bolt through holes 501 that cooperate with the protective cover mounting bolts 8. Both the rear end cover mounting bolt through hole 401 and the protective cover mounting bolt through hole 501 are counterbore holes. The counterbore hole of the rear end cover mounting bolt through hole 401 is used to place the spacer 6. In the present utility model, the holes for connecting bolts on the rear end cover and the protective cover are both counterbore holes. The rear end cover mounting bolt through hole can be used to place the spacer to control the distance between the rear end cover and the protective cover. The counterbore hole of the protective cover mounting bolt through hole can protect the bolt head of the protective cover mounting bolt to prevent impact during use and reduce the damage rate of the equipment.

[0033] As Figures 1 to 6 shown, an anti-collision walking speed reducer, the depth of the counterbore of the rear end cover mounting bolt through-hole 401 is less than the height of the spacer 6. After the protective cover 5 is installed, there is a clearance fit between the outer end face 405 of the rear end cover of the rear end cover 4 and the protective cover 5. After the protective cover of the present utility model is installed, there is a certain small clearance between the inner end face 508 of the protective cover and the outer end face 405 of the rear end cover of the speed reducer to ensure the installation accuracy of the protective cover.

[0034] As Figures 1 to 6 shown, an anti-collision walking speed reducer, the number of the rear end cover mounting bolt through-holes 401 is an integer multiple of the number of the protective cover mounting bolt through-holes 501. A part of the rear end cover mounting bolt through-holes of the present utility model are used to fix the rear end cover and the first-stage internal gear ring 3 on the second-stage internal gear ring 2, and the other part is used to fix the protective cover 5, the rear end cover 4 and the first-stage internal gear ring 3 on the second-stage internal gear ring 2. The number of the rear end cover mounting bolt through-holes is an integer multiple of the number of the protective cover mounting bolt through-holes, so that the protective cover mounting bolt through-holes 501 can be aligned with the corresponding rear end cover mounting bolt through-holes of the rear end cover 4.

[0035] As Figure 4 , Figure 5 and Figure 7 shown, an anti-collision walking speed reducer, the oil filling port 403 and the oil drain port 402 are vertically symmetrically arranged, and the oil level observation port 404 is located at a position slightly above the horizontal middle. The oil filling port 403, the oil drain port 402 and the oil level observation port 404 are respectively provided with an oil drain plug 9, an oil filling plug 10 and a liquid level observation plug 11, and the thread specifications of the oil filling port 403, the oil drain port 402 and the oil level observation port 404 are kept consistent.

[0036] As Figures 7 to 9 shown, an anti-collision walking speed reducer, the protective cover 5 is a hollow ring, and a stop collar 507 for wrapping the rear end cover 4 is provided on one side of the protective cover 5 close to the speed reducer body 1. A groove 506 for placing the spacer 6 is provided inside the stop collar 507. A plurality of jacking holes 502 are provided on the protective cover 5, and the jacking holes 502 have the same thread size specification as the protective cover mounting bolt 8. The protective cover of the present utility model is a transparent cover with an inner ring opening, and the cross-sectional shape of the protective cover is L-shaped. The protective cover is provided with a precision-machined stop, a groove, a protective cover mounting bolt through-hole 501, a jacking hole, a round hole I, a round hole II and a round hole III. The stop is matched with the outer circle of the rear end cover, the groove is used to place the spacer, the protective cover mounting bolt through-holes are circumferentially and uniformly arranged, the thread of the jacking hole is the same as the thread size specification of the protective cover mounting bolt, and the round hole I, the round hole II and the round hole III respectively correspond to the oil drain port, the oil filling port and the oil level observation port of the rear end cover to facilitate the maintenance of the speed reducer.

[0037] As Figure 6 ​​An anti-collision walking speed reducer as shown, a pad through hole 601 is provided on the pad 6, and the inner diameter of the pad through hole 601 is larger than the outer diameter of the protective cover mounting bolt 8. After the protective cover of the present utility model is installed, the pad is embedded in the rear end cover through hole, and the pad through hole needs to be one size larger than the normal bolt through hole to compensate for the error caused by processing accuracy.

[0038] The present utility model also provides a hydraulic excavator, including the above-mentioned anti-collision walking speed reducer. It can achieve the anti-collision of the walking speed reducer. At the same time, the protective cover can be independent of the reducer body, which is beneficial to the replacement when the protective cover is damaged.

[0039] In the specification provided herein, a large number of specific details are described. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures, and technologies are not shown in detail so as not to obscure the understanding of this specification.

[0040] In addition, those skilled in the art can understand that although some embodiments described herein include certain features contained in other embodiments rather than other features, the combination of features of different embodiments also means being within the protection scope of the present utility model and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in a combined manner according to the known technical solutions and the technical problems to be solved by this application.

[0041] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present utility model, can make some changes or modifications to the above-mentioned technical content as equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change, and modification made to the above embodiments according to the technical essence of the present utility model still fall within the scope of the present utility model.

Claims

1. An anti-collision walking speed reducer, characterized in that: It includes a speed reducer body (1), a rear end cover (4) is provided at the end of the speed reducer body (1), a protective cover (5) is provided outside the rear end cover (4), the protective cover (5) is fixed to the rear end cover (4) and the speed reducer body (1) by protective cover mounting bolts (8), a spacer block (6) is provided between the protective cover (5) and the rear end cover (4), and the spacer block (6) is fixed by the protective cover mounting bolts (8). An oil filling port (403), an oil draining port (402) and an oil level observation port (404) are provided on the rear end cover (4), and circular holes Ⅰ (503), Ⅱ (504) and Ⅲ (505) are provided at corresponding positions on the protective cover (5).

2. The anti-collision walking speed reducer according to claim 1, characterized in that: The rear end cover (4) and the protective cover (5) are respectively provided with rear end cover mounting bolt through holes (401) and protective cover mounting bolt through holes (501) that cooperate with the protective cover mounting bolts (8). The rear end cover mounting bolt through holes (401) and the protective cover mounting bolt through holes (501) are both counterbore holes, and the counterbore hole of the rear end cover mounting bolt through hole (401) is used to place the spacer block (6).

3. The anti-collision walking speed reducer according to claim 2, characterized in that: The depth of the counterbore hole of the rear end cover mounting bolt through hole (401) is less than the height of the spacer block (6). After the protective cover (5) is installed, there is a clearance fit between the outer end face (405) of the rear end cover of the rear end cover (4) and the protective cover (5).

4. The anti-collision walking speed reducer according to claim 2, characterized in that: The number of the rear end cover mounting bolt through holes (401) is an integer multiple of the number of the protective cover mounting bolt through holes (501).

5. The anti-collision walking speed reducer according to claim 1, characterized in that: The oil filling port (403) and the oil draining port (402) are vertically symmetrically arranged along the diameter direction of the rear end cover (4), and the oil level observation port (404) is arranged on one side of the oil filling port (403) and the oil draining port (402).

6. The anti-collision walking speed reducer according to claim 1, characterized in that: An oil filling plug (10), an oil draining plug (9) and a liquid level observation plug (11) are respectively provided on the oil filling port (403), the oil draining port (402) and the oil level observation port (404), and the thread specifications of the oil filling port (403), the oil draining port (402) and the oil level observation port (404) are the same.

7. The anti-collision walking speed reducer according to claim 1, characterized in that: The protective cover (5) is a hollow ring. A stop collar (507) for wrapping the rear end cover (4) is provided on the side of the protective cover (5) close to the speed reducer body (1), and a groove (506) for placing the spacer block (6) is provided inside the stop collar (507).

8. The anti-collision walking speed reducer according to claim 1, characterized in that: A number of jacking holes (502) are provided on the protective cover (5), and the jacking holes (502) have the same thread size specification as the protective cover mounting bolts (8).

9. The anti-collision walking speed reducer according to claim 1, characterized in that: A spacer block through hole (601) is provided on the spacer block (6), and the inner diameter of the spacer block through hole (601) is larger than the outer diameter of the protective cover mounting bolt (8).

10. A hydraulic excavator, characterized in that: It includes an anti-collision walking speed reducer according to any one of claims 1-9.

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