Speed reducer protection device and engineering machinery
By installing the protective device of the arc-shaped protective cover and connecting plate on the reducer, the problem of the reducer being easily damaged during the excavator walking is solved, and effective protection of the reducer is achieved.
Patent Information
- Application Number
- CN202422612567.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-10-29
AI Technical Summary
Existing large mining excavator walking reducers are easily damaged by collisions and bumps during use, especially when the walking track plate cannot fully protect the reducer body, especially when the walking traction force is high, the reducer is more susceptible to damage.
A reducer protection device is designed, including a plurality of arc-shaped protective covers and connecting plates, which are bolted to the end cover of the reducer, and a closed circular guard is formed through the connecting plate to enhance the collision resistance, and the collision force of external objects is transmitted to the entire protective device rather than the reducer body.
Effectively slow down the damage to the reducer by foreign objects during the excavator's walking, enhance the anti-collision ability of the protective cover, and protect the reducer body from damage.
Smart Images
Figure CN223136892U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a protection device for a speed reducer, belonging to the technical field of mining excavators. Background Art
[0002] At present, the traveling speed reducers of large mining excavators often adopt planetary structure speed reducers with two-stage or three-stage reduction. The speed reducer mainly consists of a transmission shaft, gears, a planetary carrier, etc. inside, which can achieve the function of reducing speed and increasing torque, but at the same time puts forward higher requirements for the anti-collision of the speed reducer.
[0003] During the use of the existing traveling speed reducer, due to the relatively low height of the excavator chassis, collisions and bumps are inevitable, which will damage the internal structure of the speed reducer. In order to reduce the collision damage of the speed reducer during walking, designers will protect the speed reducer by making the width of the traveling track shoe exceed the body of the speed reducer during the design process. However, for some models, due to the requirement of traveling traction, the body of the speed reducer will exceed the width of the track shoe, making the track shoe unable to effectively protect the speed reducer. Summary of the Invention
[0004] In view of the deficiencies of the existing technology, the utility model provides a protection device for a speed reducer, which can effectively reduce the damage caused by external objects to the body of the speed reducer of the excavator during walking.
[0005] The utility model is realized according to the following technical solutions:
[0006] In a first aspect, the utility model provides a protection device for a speed reducer, including:
[0007] A plurality of arc-shaped protective covers are evenly arranged at the end of the speed reducer along the entire circumference, and each protective cover is fixed to the end cover of the speed reducer in a manner of sharing part of the end cover bolts;
[0008] A plurality of connecting plates are respectively arranged between adjacent two protective covers, and the two spaced protective covers are connected by the connecting plates, so as to form a closed circular protective cover by the plurality of protective covers along the entire circumferential direction.
[0009] In some embodiments, the protective cover includes an arc-shaped protection plate and a baffle welded thereto or integrally cast; wherein, the baffle is vertically located at the outer edge of the inner arc surface of the protection plate.
[0010] In some embodiments, at least one through hole Ⅰ coaxial with the through hole Ⅱ on the end cover is provided on the baffle, and the end cover bolt passes through the through hole Ⅰ and the through hole Ⅱ and then is screwed into the threaded hole on the end face of the speed reducer, so as to fix the baffle on the end cover.
[0011] In some embodiments, a bolt sheath is fastened in a through hole II on the end cover coaxially arranged with the through hole I. The inner hole diameter of the bolt sheath is the same as the outer diameter of the rod part of the end cover bolt. The end cover bolt passes through the through hole I and the bolt sheath and is then screwed into a threaded hole on the end face of the speed reducer. The gap between the end cover bolt and the through hole II is filled by the bolt sheath.
[0012] In some embodiments, a bolt protection device for protecting the end cover bolt is provided on the outer vertical surface of the baffle near the through hole I.
[0013] In some embodiments, the bolt protection device is composed of a plurality of ribs protruding from the outer vertical surface of the baffle and connecting end to end to enclose the exposed part of the end cover bolt in its sinking groove; alternatively, the bolt protection device is composed of a plurality of ribs protruding from the outer vertical surface of the baffle and connecting end to end to enclose the exposed part of the end cover bolt in its sinking groove and a protection plate connected thereto.
[0014] In some embodiments, the outer arc surface of the protection plate is provided with step surfaces at both ends along its circumference. The connecting plate is lapped on the step surfaces of two adjacent protection plates to connect the two adjacent protection plates together.
[0015] In some embodiments, the protective cover further includes an arc-shaped bent plate. The shape of the bent plate is the same as that of the protection plate, so that the bent plate is closely attached to the inner arc surface of the protection plate and the two are welded together.
[0016] In some embodiments, the baffle is an irregular plate structure formed by obliquely cutting the included angles at both ends of the inner ring surface on the basis of a sector ring structure.
[0017] In a second aspect, the present utility model provides a construction machinery, including a traveling speed reducer, and the above-mentioned speed reducer protection device is installed on the traveling speed reducer.
[0018] Advantages of the present utility model:
[0019] The present utility model provides a speed reducer protection device, which enables the protective cover to be assembled onto the speed reducer body through a bolt sheath and some end cover bolts of the speed reducer, and is assembled on site by welding the connecting plates, so that each protective cover forms an integral body. When the speed reducer is working and is subjected to an external force, the acting force generated by an external object can be transmitted to the whole protection device, enhancing the anti-collision ability of the protective cover, and effectively slowing down the damage to the speed reducer body caused by an external object when the excavator traveling speed reducer is traveling. Description of the drawings
[0020] The accompanying drawings, as 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 accompanying drawings in the following description are only some embodiments, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.
[0021] In the accompanying drawings:
[0022] Figure 1 It is the overall schematic diagram of the application of the speed reducer protection device of the present utility model;
[0023] Figure 2 It is the exploded schematic diagram of the application of the speed reducer protection device of the present utility model;
[0024] Figure 3 It is the exploded schematic diagram of the speed reducer protection device of the present utility model.
[0025] Reference numerals in the drawings: 1. End cover bolt; 2. Protective cover; 3. Connecting plate; 4. Bent plate; 5. Protection plate; 6. Baffle; 7. Rib; 8. End cover; 9. Speed reducer; 10. Through hole Ⅰ; 11. Bolt sheath.
[0026] It should be noted that these drawings and text 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. Detailed implementation manners
[0027] 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.
[0028] 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 accompanying 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 to the present utility model.
[0029] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0030] As Figure 1 , Figure 2 shown, a speed reducer protection device includes a plurality of arc-shaped protective covers 2 and a plurality of connecting plates 3; the plurality of protective covers 2 are uniformly arranged at the end of the speed reducer 9 along the entire circumference at intervals, and each protective cover 2 is fixed to the end cover 8 of the speed reducer 9 by sharing the end cover bolts 1; the plurality of connecting plates 3 are respectively arranged between two adjacent protective covers 2, and the two spaced protective covers 2 are connected by the connecting plate 3, so that the plurality of protective covers 2 form a closed circular protective cover along the entire circumferential direction, playing a protective role for the speed reducer 9.
[0031] It should be noted that the protective cover 2 is welded into a whole on site through the connecting plate 3, so that the force generated by an external object collision is transmitted to the whole protection device, and the speed reducer body; the number of the protective covers 2 is not fixed and is determined according to the size of the speed reducer body. The protective cover 2 is fixed on the speed reducer body through structures such as part of the end cover bolts 1 and the connecting plate 3 of the speed reducer itself, and is not connected to other structures, ensuring the independence of the speed reducer 9 and the protective cover 2.
[0032] The above protective cover structure is further described below.
[0033] As Figure 3 shown, the protective cover 2 includes an arc-shaped protective plate 5 and a baffle 6 welded thereto or integrally cast; wherein, the baffle 6 is vertically located at the outer edge of the inner arc surface of the protective plate 5.
[0034] In a further solution, as Figure 1 , Figure 2 , Figure 3 shown, at least one through hole I 10 coaxial with the through hole II on the end cover 8 is provided on the baffle 6, and the end cover bolt 1 passes through the through hole I 10 and the through hole II and is then tightened into the threaded hole on the end face of the speed reducer 9, so as to fix the baffle 6 on the end cover 8.
[0035] In a further solution, as Figure 2As shown in the figure, a bolt sheath 11 is fastened in a through hole II on an end cover 8 arranged coaxially with a through hole I 10. The inner hole diameter of the bolt sheath 11 is the same as the outer diameter of the rod part of an end cover bolt 1. The end cover bolt 1 passes through the through hole I 10 and the bolt sheath 11 and is then screwed tightly into a threaded hole on the end face of a speed reducer 9. The gap between the end cover bolt 1 and the through hole II is filled by the bolt sheath 11 to prevent suspension at the joint of the end of the end cover bolt 1, effectively increasing the locking torque of the protection device.
[0036] A further solution is as Figure 1 , Figure 2 , Figure 3 shown. A bolt protection device for protecting the end cover bolt 1 is provided on the outer vertical surface of a baffle 6 near the through hole I 10, so that the bolt head is completely hidden inside a protection plate 5 to prevent damage to the end cover bolt 1 caused by collision.
[0037] In a preferred solution, the bolt protection device is composed of a plurality of ribs 7 protruding from the outer vertical surface of the baffle 6 and surrounding the exposed part of the end cover bolt 1 in its sunk groove end to end; alternatively, the bolt protection device is composed of a plurality of ribs 7 protruding from the outer vertical surface of the baffle 6 and surrounding the exposed part of the end cover bolt 1 in its sunk groove and connected to the protection plate 5.
[0038] It should be noted that in the drawings, the bolt protection device is composed of three ribs 7 welded together in a U-shaped structure and welded to the protection plate 5.
[0039] As Figure 1 , Figure 2 shown, the outer arc surfaces of the protection plates 5 are both provided with stepped surfaces at both ends along its circumferential direction, and a connecting plate 3 is lapped on the stepped surfaces of two adjacent protection plates 5 to connect the two adjacent protection plates 5 together.
[0040] A further solution is as Figure 3 shown. The protective cover 2 further includes an arc-shaped bent plate 4. The shape of the bent plate 4 is the same as that of the protection plate 5, so that the bent plate 4 is closely attached to the inner arc surface of the protection plate 5 and the two are welded together.
[0041] A further solution is as Figure 3 shown. The baffle 6 is an irregular plate structure formed by obliquely cutting the included angles at both ends of its inner ring surface on the basis of a sector ring structure.
[0042] In summary, the present utility model provides a speed reducer protection device. A plurality of protective covers are assembled onto the speed reducer body through bolt sheaths and the end cover bolts of the speed reducer itself, and are welded on site through connecting plates, so that the protective covers form a whole to play a protective role for the speed reducer. The specific functions are:
[0043] 1. Different protective cover specifications are designed according to different reducer sizes to match the reducer. The protective cover is assembled with the reducer through the end cover bolts and bolt sheaths of the reducer. The protective cover is not connected to other structures of the reducer, ensuring the independence of the reducer and the protective cover. A bolt sheath is added at the connection between the protective device and the end cover bolts of the reducer to prevent the end of the bolt from having a suspension at the joint, effectively increasing the locking torque of the protective device.
[0044] 2. The protective cover is designed with a bolt protection device through baffles and ribs, so that the bolt head is completely sunk into the sunk groove formed by the welded joint of the protective plate and the ribs, preventing the end cover bolts from being damaged by external objects during the movement of the reducer.
[0045] 3. After the protective cover and the reducer are assembled, they need to be welded and connected through the connecting plate to form an integral whole for the protective cover, so that the force generated by the collision of external objects is transmitted to the entire protective device rather than the reducer body. The number of protective covers is not fixed and is determined according to the volume of the reducer body.
[0046] The construction machinery provided by the present utility model will be described below. The construction machinery described below can be mutually corresponding and referred to the reducer protection device described above.
[0047] A construction machinery provided by the present utility model may include the reducer protection device described in any one of the above embodiments.
[0048] The beneficial effects achieved by the construction machinery provided by the present utility model are consistent with those achieved by the reducer protection device provided by the present utility model, so they will not be elaborated here.
[0049] It should be noted that the above construction machinery may be a crawler crane, a crawler excavator, a crawler pump truck or other crawler construction machinery.
[0050] In the specification provided here, 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.
[0051] 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 the features of different embodiments also means within the protection scope of the present utility model and forms different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by this application.
[0052] The above are only the preferred embodiments of the present utility model, and do not impose any formal restrictions 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 using the technical content prompted above to obtain equivalent embodiments with 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 technical solution of the present utility model.
Claims
1. A speed reducer protection device, characterized in that, Including: A plurality of protective covers with arc-shaped structures are evenly arranged along the entire circumference at the end of the speed reducer, and each protective cover is fixed to the end cover of the speed reducer in a manner of sharing part of the end cover bolts. A plurality of connecting plates are respectively arranged between adjacent two protective covers. Through the connecting plates, the two spaced-apart protective covers are connected together, and thus a plurality of protective covers form a closed circular protective cover along the entire circumferential direction.
2. A speed reducer protection device according to claim 1, wherein: The protective cover includes an arc-shaped protection plate and a baffle welded thereto or integrally cast therewith; wherein, the baffle is perpendicularly located at the outer edge of the inner arc surface of the protection plate.
3. A speed reducer protection device according to claim 2, wherein: At least one through hole Ⅰ coaxial with the through hole Ⅱ on the end cover is provided on the baffle. The end cover bolt passes through the through hole Ⅰ and the through hole Ⅱ and is then tightened in the threaded hole on the end face of the speed reducer, thereby fixing the baffle on the end cover.
4. A speed reducer protection device according to claim 3, wherein: A bolt sheath is fastened in the through hole Ⅱ on the end cover coaxial with the through hole Ⅰ. The inner hole diameter of the bolt sheath is the same as the outer diameter of the rod portion of the end cover bolt. The end cover bolt passes through the through hole Ⅰ and the bolt sheath and is then tightened in the threaded hole on the end face of the speed reducer, and the gap between the end cover bolt and the through hole Ⅱ is filled by the bolt sheath.
5. A speed reducer protection device according to claim 3, wherein: A bolt protection device for protecting the end cover bolt is provided at the outer vertical surface of the baffle near the through hole Ⅰ.
6. A speed reducer protection device according to claim 5, wherein: The bolt protection device is composed of a plurality of ribs protruding from the outer vertical surface of the baffle and connecting the head and tail to enclose the exposed part of the end cover bolt in its sunk groove. Or, the bolt protection device is composed of a plurality of ribs protruding from the outer vertical surface of the baffle and connecting the head and tail to enclose the exposed part of the end cover bolt in its sunk groove and connected to the protection plate.
7. A speed reducer protection device according to claim 2, wherein: The outer arc surfaces of the protection plates are provided with step surfaces at both ends along their circumferences. The connecting plates are lapped on the step surfaces of adjacent two protection plates to connect the adjacent two protection plates together.
8. A speed reducer protection device according to claim 2, wherein: The protective cover further includes an arc-shaped bent plate, and the shape of the bent plate is the same as that of the protection plate, so that the bent plate is closely attached to the inner arc surface of the protection plate and the two are welded together.
9. A speed reducer protection device according to claim 2, wherein: The baffle is an irregular plate structure formed by obliquely cutting the two end angles of the inner ring surface on the basis of a sector ring structure as a whole.
10. An engineering machinery, including a traveling speed reducer, wherein: The speed reducer protection device according to any one of claims 1 to 9 is installed on the traveling speed reducer.