Electric shovel tensioning wheel device and electric shovel crawler belt device

Abstract

The invention discloses an electric shovel tensioning wheel device which comprises a tensioning wheel, a copper pad, a thrust washer, a sealing piece, a bearing seat, a copper sleeve, a limiting sleeve and a tensioning shaft, the copper pad is fixed to the side end face of the tensioning wheel, the thrust washer is arranged on the periphery of an extending cylinder part of the bearing seat in a sleeving mode and attached between the copper pad and a track frame, and the limiting sleeve is connected to the end of the tensioning shaft in a threaded mode. The copper sleeve is arranged between the tensioning shaft and the bearing seat in a sleeved mode, the two sides of the copper sleeve are limited by the copper pad and the limiting sleeve, the sealing piece is arranged on the periphery of the copper pad, the two side faces of the sealing piece are attached to the tensioning wheel and the thrust washer respectively, a first oil inlet hole is formed in the upper portion of the bearing seat, and a second oil inlet hole is formed in the side portion of the bearing seat. An oil guide groove is formed in the outer wall of the copper sleeve in the axial direction, the first oil guide hole communicates with the first oil inlet, the second oil guide hole is located in one end of the oil guide groove, and the other end of the oil guide groove communicates with the second oil inlet. The device is simple in structure, convenient to disassemble and assemble, low in maintenance workload, low in maintenance cost and long in service life, and the wear rate is remarkably reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of electric shovels, and in particular relates to an electric shovel tension wheel device and an electric shovel crawler device comprising the electric shovel tension wheel device. Background Art

[0002] The electric shovel is a single-bucket excavator that uses transmission parts such as gears, chains, steel cables, and pulleys to transmit power. It is one of the main mining equipment in tens of millions of tons of open-pit mines. It has high productivity, high operating rate, and low operating cost. It is a recognized model in the mining industry. The electric shovel consists of a crawler device, a slewing device, a working device, a lubrication system, an air supply system, a lifting mechanism, etc.

[0003] The tension wheel device is a key component of the electric shovel and an important component of the electric shovel crawler device. It is used to tighten the track shoe. In the prior art, the tension wheel adopts a split structure, which is nested and welded together with the wheel body. It is easy to crack after being used for a period of time, it is inconvenient to weld on site, and the maintenance cost is high; the bushings on both sides of the tension wheel have a small contact area with the tension wheel and wear quickly. When the wear reaches a certain extent, as the range of movement of the tension wheel on the inner side of the track frame increases, the tension wheel hits the seals and ring gaskets on both sides, causing the ring gaskets to break and lose, and the seals to be damaged. In this case, if the on-site maintenance personnel fail to find it in time, the wear of the spline on the inner side of the tension wheel will be aggravated, and the service life of the tension wheel will be reduced; because the bushings on both sides of the tension wheel are relatively long, in the prior art, two lubricating oil holes are provided on the upper part of the tension shaft seat, one lubricating oil hole supplies oil to the outer side of the bushing, and the other lubricating oil hole supplies oil to the inner side of the bushing. Since the two lubricating oil holes are close, the lubricating oil leading to the inside will also overflow from the outside, affecting the lubrication effect of the inner side of the bushing, increasing friction loss, and reducing the service life of the bushing. Summary of the invention

[0004] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the present invention provides an electric shovel tension wheel device, which is installed on the crawler frame of the electric shovel and is located between the first extension part and the second extension part of the crawler frame. The electric shovel tension wheel device includes a tension wheel and a tension shaft. The tension wheel is coaxially connected to the middle part of the tension shaft through a spline. Copper pads, thrust washers, seals, bearing seats, copper sleeves, and limit sleeves are respectively arranged on both sides of the tension wheel, wherein:

[0005] The copper washer on the first side of the tension wheel is sleeved on the tension shaft and fixed to the first side end surface of the tension wheel by bolts, and the copper washer on the second side of the tension wheel is sleeved on the tension shaft and fixed to the second side end surface of the tension wheel by bolts;

[0006] Both sides of the tensioning shaft are rotatably mounted on the first extension part and the second extension part through a bearing seat located on the first side of the tensioning wheel and a bearing seat located on the second side of the tensioning wheel respectively;

[0007] The thrust washer on the first side of the tension wheel is sleeved on the outer periphery of the extension cylinder of the bearing seat located on the first side of the tension wheel and is fitted between the copper washer and the first extension portion; the thrust washer on the second side of the tension wheel is sleeved on the outer periphery of the extension cylinder of the bearing seat located on the second side of the tension wheel and is fitted between the copper washer and the second extension portion;

[0008] The limiting sleeves on both sides of the tension wheel are respectively connected to the two side ends of the tension shaft through threads and fixed by a fastening assembly;

[0009] The copper sleeve on the first side of the tension wheel is sleeved between the tension shaft and the bearing seat located on the first side of the tension wheel, and the two sides of the copper sleeve are respectively limited by copper pads and limit sleeves, and the copper sleeve on the second side of the tension wheel is sleeved between the tension shaft and the bearing seat located on the second side of the tension wheel, and the two sides of the copper sleeve are respectively limited by copper pads and limit sleeves;

[0010] The sealing member on the first side of the tension wheel is arranged on the outer periphery of the copper washer located on the first side of the tension wheel, and the two side surfaces of the sealing member are respectively in close contact with the tension wheel and the thrust washer located on the first side of the tension wheel; the sealing member on the second side of the tension wheel is arranged on the outer periphery of the copper washer located on the second side of the tension wheel, and the two side surfaces of the sealing member are respectively in close contact with the tension wheel and the thrust washer located on the second side of the tension wheel;

[0011] A first oil inlet hole is provided on the upper part of the bearing seat on both sides of the tension wheel, and a second oil inlet hole is provided on the side of the bearing seat on both sides of the tension wheel, and the axes of the first oil inlet hole and the second oil inlet hole are perpendicular to each other;

[0012] The copper sleeves on both sides of the tension wheel are provided with a first oil guide hole and a second oil guide hole that penetrate from the outer wall to the inner wall, the axes of the first oil guide hole and the second oil guide hole are perpendicular to each other, and an oil guide groove is provided on the outer wall of the copper sleeve along the axial direction of the copper sleeve, and the second oil guide hole is located in the oil guide groove and at an end of the oil guide groove away from the first oil guide hole;

[0013] When the bearing seat and the copper sleeve on the same side of the tension wheel are sleeved together, the first oil guide hole and the first oil inlet hole are connected to each other, and the end of the oil guide groove away from the second oil guide hole is connected to the second oil inlet hole.

[0014] Furthermore, in the above-mentioned electric shovel tension wheel device, the tension wheel adopts a cast one-piece structure, and circular grooves are processed on both side end faces. The copper pad is embedded in the circular groove. The copper pad has a circle of grooves along the circumferential direction, and the bolt is located in the groove.

[0015] Furthermore, in the above-mentioned electric shovel tension wheel device, the sealing member is a V-shaped sealing ring.

[0016] Furthermore, in the above-mentioned electric shovel tension wheel device, the fastening assembly is a combined structure of a shaft end baffle and bolts.

[0017] Furthermore, in the above-mentioned electric shovel tension wheel device, two threaded holes are preset on the side of the copper washer facing the thrust washer, and two through holes are preset on the thrust washer. The two threaded holes of the copper washer correspond one to one with the two through holes of the thrust washer, so as to pre-assemble the tension wheel, copper washer and thrust washer into one by using screws when assembling the electric shovel tension wheel device.

[0018] On the other hand, the present invention further provides an electric shovel crawler device, which includes the above-mentioned electric shovel tensioning wheel device.

[0019] The electric shovel tension wheel device of the present invention and the electric shovel crawler device including the electric shovel tension wheel device have the following advantages and

[0020] Beneficial effects:

[0021] (1) The present invention has a simple structure, is easy to disassemble and assemble, has a small maintenance workload for the tension wheel, and has a low maintenance cost;

[0022] (2) The present invention shares the impact load on the tension wheel during the operation of the tension wheel device of the electric shovel by adding a copper washer between the tension wheel and the thrust washer. In addition, the contact area between the thrust washer and the copper washer is increased, thereby reducing the risk of wear of the contact parts, thereby effectively reducing the risk of wear of the spline on the inner side of the tension wheel, and greatly improving the service life of the tension wheel device of the electric shovel.

[0023] (3) The present invention provides two sets of independent lubrication routes, one set of which is the first oil inlet hole of the bearing seat and the first oil guide hole of the copper sleeve, and the other set of which is the second oil inlet hole of the bearing seat, the oil guide groove of the copper sleeve, and the second oil guide hole of the copper sleeve, thereby ensuring sufficient lubrication of the entire copper sleeve, thereby reducing the wear of the copper sleeve and increasing the service life of the electric shovel tension wheel device;

[0024] (4) The present invention provides a V-shaped sealing ring on the outer periphery of the copper washer and fits the V-shaped sealing ring tightly between the tension wheel and the thrust washer, thereby effectively preventing impurities such as oil, water and dust from entering the tension wheel device of the electric shovel, reducing the failure rate of the device and increasing the overall service life of the device;

[0025] (5) The present invention provides limit sleeves on both side ends of the tensioning shaft, so that the limit sleeves can be rotated at any time to feed the tensioning wheel, thereby ensuring the centering of the components of the tensioning wheel device of the electric shovel and compensating the gaps between the components, thereby avoiding collision and wear between the components and improving the service life of the tensioning wheel device of the electric shovel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings in the following descriptions are only used to further understand the embodiments of the present invention and constitute a part of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0027] Figure 1 This is a front view of the electric shovel tension wheel device of the present invention installed on the crawler frame

[0028] Figure 2 is a front view of the electric shovel tension wheel device of the present invention;

[0029] Figure 3 is along Figure 1 Sectional view of AA in the middle;

[0030] Figure 4 yes Figure 3 The enlarged schematic diagram of the middle part B;

[0031] Figure 5 Schematic diagram of the structure of the bearing seat and the copper sleeve in the tension wheel device of the electric shovel of the present invention, wherein (a) is a front view of a partial section, and (b) is a side view;

[0032] Figure 6 It is a schematic diagram of the structure of the copper sleeve in the electric shovel tension wheel device of the present invention, wherein (a) is the main view, (b) is the cross-sectional view along CC in (a), and (c) is the cross-sectional view along DD in (b).

[0033] Description of reference numerals:

[0034] 100-electric shovel tension wheel device, 200-track frame, 201-first extension, 202-second extension, 1-tension wheel, 2-copper pad, 21-bolt, 3-thrust washer, 4-seal, 5-bearing seat, 51-first oil inlet hole, 52-second oil inlet hole, 6-copper sleeve, 61-first oil guide hole, 62-second oil guide hole, 63-oil guide groove, 7-limiting sleeve, 8-tension shaft, 9-fastening assembly. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0036] like Figures 1 to 6 As shown, the electric shovel tension wheel device 100 provided by the present invention is installed on the crawler frame 200 of the electric shovel, and is located between the first extension part 201 and the second extension part 202 of the crawler frame 200. The electric shovel tension wheel device 100 includes a tension wheel 1 and a tension shaft 8. The tension wheel 1 is coaxially connected to the middle part of the tension shaft 8 through a spline. Copper pads 2, thrust washers 3, seals 4, bearing seats 5, copper sleeves 6, and limit sleeves 7 are respectively arranged on both sides of the tension wheel 1. For the sake of simplicity, the two sides of the tension wheel 1 are respectively referred to as the first side of the tension wheel 1 (i.e., Figure 3 on the right side of the tension wheel 1) and on the second side of the tension wheel 1 (i.e. Figure 3 ), where:

[0037] The copper washer 2 on the first side of the tension wheel 1 is sleeved on the tension shaft 8 and fixed to the first side end surface of the tension wheel 1 by bolts 21, and the copper washer 2 on the second side of the tension wheel 1 is sleeved on the tension shaft 8 and fixed to the second side end surface of the tension wheel 1 by bolts 21;

[0038] Both sides of the tensioning shaft 8 are rotatably mounted on the first extension part 201 and the second extension part 202 through the bearing seat 5 located on the first side of the tensioning wheel 1 and the bearing seat 5 located on the second side of the tensioning wheel 1 respectively;

[0039] The thrust washer 3 on the first side of the tension wheel 1 is sleeved on the outer periphery of the extended cylinder portion of the bearing seat 5 located on the first side of the tension wheel 1 and is fitted between the copper washer 2 and the first extended portion 201. The thrust washer 3 on the second side of the tension wheel 1 is sleeved on the outer periphery of the extended cylinder portion of the bearing seat 5 located on the second side of the tension wheel 1 and is fitted between the copper washer 2 and the second extended portion 202.

[0040] The limiting sleeves 7 on both sides of the tension wheel 1 are respectively connected to the ends of the tension shaft 8 by threads and fixed by fastening components 9. As a specific embodiment, the fastening component 9 is a combination structure of a shaft end baffle and bolts;

[0041] The copper sleeve 6 on the first side of the tension wheel 1 is sleeved between the tension shaft 8 and the bearing seat 5 located on the first side of the tension wheel 1, and the two sides of the copper sleeve 6 are respectively limited by the copper pad 2 and the limiting sleeve 7, and the copper sleeve 6 on the second side of the tension wheel 1 is sleeved between the tension shaft 8 and the bearing seat 5 located on the second side of the tension wheel 1, and the two sides of the copper sleeve 6 are respectively limited by the copper pad 2 and the limiting sleeve 7;

[0042] The seal 4 on the first side of the tension wheel 1 is arranged on the outer periphery of the copper pad 2 located on the first side of the tension wheel 1, and the two side surfaces of the seal 4 respectively fit in contact with the tension wheel 1 and the thrust washer 3 located on the first side of the tension wheel 1; the seal 4 on the second side of the tension wheel 1 is arranged on the outer periphery of the copper pad 2 located on the second side of the tension wheel 1, and the two side surfaces of the seal 4 respectively fit in contact with the tension wheel 1 and the thrust washer 3 located on the second side of the tension wheel 1.

[0043] In the above-mentioned electric shovel tension wheel device 100 of the present invention, by adding a copper washer 2 between the tension wheel 1 and the thrust washer 3, on the one hand, the impact load on the tension wheel 1 during the operation of the electric shovel tension wheel device is shared, thereby reducing the wear risk of the inner spline of the tension wheel 1 and improving the service life of the electric shovel tension wheel device; on the other hand, the presence of the copper washer 2 increases the contact area between the thrust washer 3 and the copper washer 2. Under the condition that the overall force remains unchanged, the pressure per unit area is significantly reduced, thereby reducing the wear rate of the copper washer 2 and the thrust washer 3, and thereby further reducing the wear risk of the inner spline of the tension wheel 1, greatly improving the service life of the electric shovel tension wheel device.

[0044] As a specific implementation, in the electric shovel tension wheel device 100 of the present invention, the tension wheel 1 adopts a cast one-piece structure, and positioning stops are processed on both side end faces to facilitate the installation and fixation of the copper pad 2.

[0045] Preferably, the positioning stops on the end faces of both sides of the tension wheel 1 are in the form of circular grooves, and the copper pad 2 is embedded in the circular grooves. The copper pad 2 has a circle of grooves along the circumferential direction, and the bolts 21 used to fix the copper pad 2 to the tension wheel 1 are located in the grooves to ensure a close fit between the copper pad 2 and the thrust washer 3.

[0046] Furthermore, in the electric shovel tension wheel device 100 of the present invention, the upper part of the bearing seat 5 on both sides of the tension wheel 1 is provided with a first oil inlet hole 51, and the side of the bearing seat 5 on both sides of the tension wheel 1 (for example, the front part of the bearing seat 5) is provided with a second oil inlet hole 52, and the axes of the first oil inlet hole 51 and the second oil inlet hole 52 are perpendicular to each other; the copper sleeve 6 on both sides of the tension wheel 1 is provided with a first oil guide hole 61 and a second oil guide hole 62 that penetrate from the outer wall to the inner wall, and the first oil guide hole 61 and the second oil guide hole 62 are provided. The axes of the oil holes 62 are perpendicular to each other, and an oil guide groove 63 is provided on the outer wall of the copper sleeve 6 along the axial direction of the copper sleeve 6, and the second oil guide hole 62 is located in the oil guide groove 63 and at the end of the oil guide groove 63 away from the first oil guide hole 61; when the bearing seat 5 and the copper sleeve 6 on the same side of the tension wheel 1 are sheathed together, the first oil guide hole 61 of the copper sleeve 6 is connected to the first oil inlet hole 51 of the bearing seat 5, and the end of the oil guide groove 63 away from the second oil guide hole 62 is connected to the second oil inlet hole 52 of the bearing seat 5. Figure 5 and Figure 6As schematically shown in (b), the second oil guide hole 62 is in the oil guide groove 63 and is located at the end of the oil guide groove 63 away from the first oil guide hole 61 (i.e., the left side in the figure), and the end of the oil guide groove 63 away from the second oil guide hole 62 (i.e., the right side in the figure) is connected to the second oil inlet hole 52 of the bearing seat 5, wherein P represents the position of the oil guide groove 63 of the copper sleeve 6 corresponding to the second oil inlet hole 52 of the bearing seat 5.

[0047] In the above-mentioned electric shovel tension wheel device 100 of the present invention, by setting the oil inlet hole, oil guide hole, and oil guide groove as described above, the lubricating oil injected from the first oil inlet hole 51 of the bearing seat 5 reaches the inner wall of the copper sleeve 6 through the first oil guide hole 61 of the copper sleeve 6, thereby lubricating the inner circumference of the copper sleeve 6 and the outer circumference of the tension shaft 8; the lubricating oil injected from the second oil inlet hole 52 of the bearing seat 5 enters the oil guide groove 63, and along the oil guide groove 63 from the position of the copper sleeve 6 corresponding to the second oil inlet hole 52 along the axial direction of the copper sleeve 6 to the second oil guide hole 62, and then reaches the inner wall of the copper sleeve 6 through the second oil guide hole 62, thereby lubricating the inner circumference of the copper sleeve 6 and the outer circumference of the tension shaft 8. In this way, it is ensured that the entire copper sleeve 6 is fully lubricated, thereby reducing the wear of the copper sleeve and increasing the service life of the electric shovel tension wheel device.

[0048] As a specific implementation, in the electric shovel tension wheel device 100 of the present invention, the seal 4 is a V-shaped sealing ring.

[0049] As a specific embodiment, in the electric shovel tension wheel device 100 of the present invention, two threaded holes are preset on the side of the copper pad 2 facing the thrust washer 3, and two through holes are preset on the thrust washer 3. The two threaded holes of the copper pad 2 correspond to the two through holes of the thrust washer 3 one by one, and are used to pre-assemble the tension wheel 1, the copper pad 2 and the thrust washer 3 into one by screwing the screws into the through holes and the threaded holes when assembling the electric shovel tension wheel device 100.

[0050] The installation method of the electric shovel tension wheel device 100 of the present invention is:

[0051] 1. Install the copper sleeves 6 into the shaft holes of the first extension part 201 and the second extension part 202 of the crawler frame 200 respectively, and insert the copper sleeves 6 into the two bearing seats 5 respectively;

[0052] 2. Fix the two copper washers 2 to the two side end surfaces of the tension wheel 1 by bolts 21, respectively sleeve the two seals 4 on the outer periphery of the two copper washers 2, and then use screws to pre-install the thrust washers 3 to the copper washers 2 through the two threaded holes of the copper washers 2 and the two through holes of the thrust washers 3;

[0053] 3. Insert the tensioning shaft 8 from the outside of the first extension part 201 into the copper sleeve 6 and extend it out of the shaft hole. Hang the pre-assembled tensioning wheel 1, copper washer 2, thrust washer 3, and seal 4 between the first extension part 201 and the second extension part 202 and sleeve them on the tensioning shaft 8 extending out of the shaft hole of the first extension part 201. Then remove the screws of the pre-assembled thrust washer 3 and copper washer 2.

[0054] 4. Push the tensioning shaft 8 until the tensioning shaft 8 passes through the copper sleeve 6 in the shaft hole of the second extension part 202, install the limit sleeve 7 at the two side ends of the tensioning shaft 8, feed the limit sleeve 7 toward the tensioning wheel 1 by spirally rotating the limit sleeve 7, align the copper sleeve 6, bearing seat 5 and thrust washer 3 on both sides of the tensioning wheel 1 toward the tensioning wheel 1, eliminate the gap between the components, and then fix the limit sleeve 7 to the end of the tensioning shaft 8 by the fastening assembly 9 to complete the assembly and installation of the electric shovel tensioning wheel device 100.

[0055] In summary, compared with the prior art, the electric shovel tension wheel device of the present invention and the electric shovel crawler device including the electric shovel tension wheel device have the following advantages and beneficial effects:

[0056] (1) The present invention has a simple structure, is easy to disassemble and assemble, has a small maintenance workload for the tension wheel, and has a low maintenance cost;

[0057] (2) The present invention shares the impact load on the tension wheel 1 during the operation of the tension wheel device of the electric shovel by adding a copper washer 2 between the tension wheel 1 and the thrust washer 3. In addition, the contact area between the thrust washer 3 and the copper washer 2 is increased, thereby reducing the risk of wear of the contact parts, thereby effectively reducing the risk of wear of the inner spline of the tension wheel 1, and greatly improving the service life of the tension wheel device of the electric shovel;

[0058] (3) The present invention provides two sets of independent lubrication routes, one set is the first oil inlet hole 51 of the bearing seat 5 and the first oil guide hole 6 of the copper sleeve 6, and the other set is the second oil inlet hole 52 of the bearing seat 5, the oil guide groove 63 of the copper sleeve 6, and the second oil guide hole 62 of the copper sleeve 6, thereby ensuring sufficient lubrication of the entire copper sleeve 6, thereby reducing the wear of the copper sleeve 6 and increasing the service life of the electric shovel tension wheel device;

[0059] (4) The present invention provides a V-shaped sealing ring 4 on the outer periphery of the copper washer 2, and the V-shaped sealing ring 4 is tightly fitted between the tension wheel 1 and the thrust washer 3, so as to effectively prevent impurities such as oil, water and dust from entering the tension wheel device of the electric shovel, reduce the failure rate of the device, and increase the overall service life of the device;

[0060] (5) The present invention provides limit sleeves 7 on both side ends of the tensioning shaft 8 by threading, so that the limit sleeves 7 can be rotated at any time to feed toward the tensioning wheel 1, thereby ensuring the centering of the components of the tensioning wheel device of the electric shovel and compensating the gaps between the components, thereby avoiding collision and wear between the components and improving the service life of the tensioning wheel device of the electric shovel.

[0061] It should be noted that, in this article, unless otherwise clearly specified and limited, the term "connection" or its synonyms should be understood in a broad sense. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Moreover, expressions such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In addition, "front", "back", "left", "right", "upper" and "lower" in this article are all referenced to the placement state shown in the accompanying drawings.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tension wheel device for an electric shovel, mounted on a track frame of the electric shovel, located between a first extension portion and a second extension portion of the track frame, the tension wheel device for the electric shovel comprising a tension wheel and a tension shaft, the tension wheel being coaxially connected to the middle of the tension shaft through a spline, characterized in that: Copper pads, thrust washers, seals, bearing seats, copper sleeves, and limit sleeves are respectively arranged on both sides of the tension wheel, wherein: The copper washer on the first side of the tension wheel is sleeved on the tension shaft and fixed to the first side end surface of the tension wheel by bolts, and the copper washer on the second side of the tension wheel is sleeved on the tension shaft and fixed to the second side end surface of the tension wheel by bolts; Both sides of the tensioning shaft are rotatably mounted on the first extension part and the second extension part through a bearing seat located on the first side of the tensioning wheel and a bearing seat located on the second side of the tensioning wheel respectively; The thrust washer on the first side of the tension wheel is sleeved on the outer periphery of the extension cylinder of the bearing seat located on the first side of the tension wheel and is fitted between the copper washer and the first extension portion; the thrust washer on the second side of the tension wheel is sleeved on the outer periphery of the extension cylinder of the bearing seat located on the second side of the tension wheel and is fitted between the copper washer and the second extension portion; The limiting sleeves on both sides of the tension wheel are respectively connected to the two side ends of the tension shaft through threads and fixed by a fastening assembly; The copper sleeve on the first side of the tension wheel is sleeved between the tension shaft and the bearing seat located on the first side of the tension wheel, and the two sides of the copper sleeve are respectively limited by copper pads and limit sleeves, and the copper sleeve on the second side of the tension wheel is sleeved between the tension shaft and the bearing seat located on the second side of the tension wheel, and the two sides of the copper sleeve are respectively limited by copper pads and limit sleeves; The sealing member on the first side of the tension wheel is arranged on the outer periphery of the copper washer located on the first side of the tension wheel, and the two side surfaces of the sealing member are respectively in close contact with the tension wheel and the thrust washer located on the first side of the tension wheel; the sealing member on the second side of the tension wheel is arranged on the outer periphery of the copper washer located on the second side of the tension wheel, and the two side surfaces of the sealing member are respectively in close contact with the tension wheel and the thrust washer located on the second side of the tension wheel; A first oil inlet hole is provided on the upper part of the bearing seat on both sides of the tension wheel, and a second oil inlet hole is provided on the side of the bearing seat on both sides of the tension wheel, and the axes of the first oil inlet hole and the second oil inlet hole are perpendicular to each other; The copper sleeves on both sides of the tension wheel are provided with a first oil guide hole and a second oil guide hole that penetrate from the outer wall to the inner wall, the axes of the first oil guide hole and the second oil guide hole are perpendicular to each other, and an oil guide groove is provided on the outer wall of the copper sleeve along the axial direction of the copper sleeve, and the second oil guide hole is located in the oil guide groove and at an end of the oil guide groove away from the first oil guide hole; When the bearing seat and the copper sleeve on the same side of the tension wheel are sleeved together, the first oil guide hole and the first oil inlet hole are connected to each other, and the end of the oil guide groove away from the second oil guide hole is connected to the second oil inlet hole.

2. The electric shovel tension wheel device according to claim 1, characterized in that: The tension wheel adopts a cast integrated structure, and circular grooves are processed on both side end faces. The copper pad is embedded in the circular grooves. The copper pad has a circle of grooves along the circumferential direction, and the bolts are located in the grooves.

3. The electric shovel tension wheel device according to claim 1, characterized in that: The sealing element is a V-shaped sealing ring.

4. The electric shovel tension wheel device according to claim 1, characterized in that: The fastening assembly is a combined structure of a shaft end baffle and bolts.

5. The electric shovel tension wheel device according to claim 1, characterized in that: Two threaded holes are preset on the side of the copper gasket facing the thrust washer, and two through holes are preset on the thrust washer. The two threaded holes of the copper gasket correspond one to one with the two through holes of the thrust washer, so as to pre-assemble the tensioning wheel, copper gasket and thrust washer into one when assembling the tensioning wheel device of the electric shovel using a screw.

6. An electric shovel crawler device, characterized in that: The electric shovel crawler device comprises an electric shovel tension wheel device according to any one of claims 1-5.

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