Automatic dust discharging device for dust collecting device of steel rail grinding wagon and steel rail grinding wagon
By introducing an automatic dust discharge device into the dust collection device of the rail grinding truck, and automatically cleaning the dust with a screw conveyor and driving mechanism, the problem of manual cleaning is solved, and efficient dust cleaning and improvement of work efficiency is achieved.
Patent Information
- Application Number
- CN202422014227.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-08-19
AI Technical Summary
The existing rail grinding truck dust collection device requires manual cleaning of dust, which is difficult to operate and time-consuming, especially in hot weather, which increases the difficulty of working.
An automatic dust discharge device for dust collection device for rail grinding trucks is designed. Two horizontally parallel-arranged tube screw conveyors and driving mechanisms are used to automatically clean up the dust in the dust collection device through the rotation of the spiral blades, and the dust is sucked in from the inlet and discharged from the outlet by using a tube screw conveyor.
Automatic dust cleaning is achieved, working time is shortened, work efficiency is improved, labor intensity of operators is reduced, and working conditions is improved.
Smart Images
Figure CN223277682U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of mechanical technology, specifically relates to the technical field of mechanical tools, and in particular relates to an automatic dust discharge device for a dust collecting device of a rail grinding vehicle and a rail grinding vehicle. Background Art
[0002] Rail grinding was first developed on heavy-haul railways for the purpose of extending the service life of rails. With the development and promotion of rail grinding technology, more and more high-speed railways, heavy-haul railways and urban rail transit have adopted this technology to extend the life of rails. At the same time, the form of rail grinding has also evolved from the initial repair grinding to maintenance grinding to the now particularly popular "frequent, fast, and light" preventive grinding.
[0003] Rail grinding requires the use of a rail grinding vehicle. This process generates a significant amount of grinding dust, which poses a significant health risk to workers and pollutes the surrounding railway environment. Therefore, rail grinding vehicles are equipped with dust collectors to filter and collect the dust generated during the grinding process. Once the dust collector reaches a certain level, it must be removed before use.
[0004] like Figure 1 As shown, the dust collecting device 102 currently installed on the frame 101 of the rail grinding vehicle has two sets of dust-discharging movable doors 103 provided below the dust collecting device 102. When a certain amount of dust is collected, the movable doors 103 are opened and the dust is manually cleaned out. When manually cleaning out, the operator must protect the whole body. When the operator wears protective clothing and a mask, the operation is difficult, time-consuming and labor-intensive. Especially in hot weather, cleaning dust increases the difficulty of the work. The utility model designs an automatic dust-discharging device for the dust collecting device of a rail grinding vehicle, which facilitates the operation of the operator, improves the working conditions, shortens the working time, and improves the working efficiency. The operator can easily and labor-savingly complete the work of removing dust from the dust collecting device. Summary of the Invention
[0005] The purpose of the utility model is to provide an automatic dust discharge device for a dust collecting device of a rail grinding vehicle, which is applied to the rail grinding vehicle. The device can automatically clean the dust, and the dust accumulated in the dust collecting device can be cleaned in a short time, which is convenient for the operation of the operator, improves the working conditions, shortens the working time, and improves the work efficiency. The operator can easily and labor-savingly complete the work of removing dust from the dust collecting device.
[0006] The technical solutions provided by this utility model are as follows:
[0007] An automatic dust discharge device for a rail grinding vehicle dust collecting device, used for automatically cleaning dust in a dust collecting device 102; comprising two horizontally parallel arranged tubular screw conveyors 1 and a drive mechanism 2;
[0008] The tubular screw conveyor 1 comprises a tubular barrel 11, a spiral blade 12 and a spiral main shaft 13; the spiral blade 12 is fixed on the spiral main shaft 13 and is installed in the tubular barrel 11 together with the spiral main shaft 13;
[0009] The tubular cylinder 11 is provided at the bottom of the dust collecting device 102 and a dust inlet 111 is provided above the tubular cylinder 11 in the dust collecting device 102; both ends are mounted on the frame 101 below the dust collecting device 102, one end extends out of the frame 101 on one side and is provided with a dust outlet; the other end extends out of the frame 101 on the other side and a drive mechanism 2 is mounted on the spiral main shaft 13 at the extended end;
[0010] The driving mechanism 2 drives the spiral blades 12 to rotate and push the dust forward through the spiral main shaft 13, automatically sucking the dust from the dust inlet 111 and discharging it from the dust outlet, and automatically cleaning the dust in the dust collecting device 102.
[0011] Preferably, the spiral main shaft 13 is a hollow shaft.
[0012] Preferably, the driving mechanism 2 includes a driving motor 21, a driving chain transmission mechanism 22, a primary driven chain transmission mechanism 23, a secondary driven chain transmission mechanism 24 and a main transmission shaft 25;
[0013] The main transmission shaft 25 is parallel to the axis of the spiral main shaft 13 and is arranged behind the frame 101 on the side where the spiral main shaft 13 extends. The drive motor 21 is installed behind the frame 101 on the side where the spiral main shaft 13 extends. The output shaft axis of the motor 21 is parallel to the axis of the spiral main shaft 13.
[0014] The main transmission chain transmission mechanism 22 connects the output shaft of the motor 21 and the main transmission shaft 25;
[0015] The primary driven chain transmission mechanism 23 connects the main transmission shaft 25 with a screw main shaft 13;
[0016] The secondary driven chain transmission mechanism 24 connects the two spiral main shafts 13;
[0017] The driving motor 21 drives the main transmission shaft 25 to rotate through the active chain transmission mechanism 22, and the main transmission shaft 25 drives one spiral main shaft 13 to rotate through the first-level driven chain transmission mechanism 23, and the second-level driven chain transmission mechanism 24 drives the other spiral main shaft 13 to rotate; the two tubular screw conveyors 1 are operated to automatically clean the dust in the dust collecting device 102.
[0018] Preferably, the active chain transmission mechanism 22 includes an active main sprocket 221, a main transmission chain 222 and an active slave sprocket 223;
[0019] The driving main sprocket 221 is mounted on the output shaft of the motor 21 ; the driving slave sprocket 223 is mounted on the main transmission shaft 25 ; and the main transmission chain 222 connects the driving main sprocket 221 and the driving slave sprocket 223 .
[0020] Preferably, the primary driven chain transmission mechanism 23 includes a primary driven main sprocket 231, a primary driven chain 232 and a primary driven slave sprocket 233;
[0021] The primary driven main sprocket 231 is mounted on the main transmission shaft 25 ; the primary driven slave sprocket 233 is mounted on a spiral main shaft 13 ; and the primary driven chain 232 connects the primary driven main sprocket 231 and the primary driven slave sprocket 233 .
[0022] Preferably, the rail grinding vehicle dust collecting device uses an automatic dust discharge device, further comprising a tensioning mechanism 26 , which is fixed to the outside of the vehicle frame 101 and tensions the primary driven chain 232 ;
[0023] The tensioning mechanism 26 includes a fixed bracket 261 and a tensioning sprocket 262 . The fixed bracket 261 is provided with a vertical slide groove. The pin shaft of the tensioning sprocket 262 is installed in the vertical slide groove and moves up and down to tension the primary driven chain 232 .
[0024] Preferably, the secondary driven chain transmission mechanism 24 includes a secondary driven main sprocket 241, a secondary driven chain 242 and a secondary driven slave sprocket 233;
[0025] The secondary driven main sprocket 241 is mounted on one spiral main shaft 13 ; the secondary driven slave sprocket 243 is mounted on the other spiral main shaft 13 ; and the secondary driven chain 242 connects the secondary driven main sprocket 241 and the secondary driven slave sprocket 243 .
[0026] Preferably, the automatic dust discharge device for the rail grinding vehicle dust collection device further includes a tensioning mechanism 26 , which is fixed to the outside of the vehicle frame 101 and tensions the secondary driven chain 242 ;
[0027] The tensioning mechanism 26 includes a fixed bracket 261 and a tensioning sprocket 262 . The fixed bracket 261 is provided with a vertical slide groove. The pin shaft of the tensioning sprocket 262 is installed in the vertical slide groove and moves up and down to tension the secondary driven chain 242 .
[0028] A rail grinding vehicle comprises a vehicle frame 101 on which a dust collecting device 102 is mounted. An automatic dust discharge device for the rail grinding vehicle dust collecting device is mounted on the vehicle frame 101 at the bottom of the dust collecting device 102 to automatically clean dust in the dust collecting device 102.
[0029] It can be seen from the technical solution provided by the above-mentioned utility model that an automatic dust discharge device for a dust collecting device of a rail grinding vehicle provided in an embodiment of the utility model is applied to a rail grinding vehicle. The dust can be automatically cleaned by the device, and the dust accumulated in the dust collecting device can be cleaned in a short time, which is convenient for the operation of the operator, improves the working conditions, shortens the working time, and improves the work efficiency. The operator can easily and labor-savingly complete the work of removing dust from the dust collecting device. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0031] Figure 1 A schematic diagram of a dust collecting device for a rail grinding vehicle in the prior art;
[0032] Figure 2 A schematic diagram of the three-dimensional structure of an automatic dust discharge device for a rail grinding vehicle dust collection device provided in Example 1 of the present utility model;
[0033] Figure 3 A schematic diagram of the structure of a driving mechanism for an automatic dust discharge device for a rail grinding vehicle dust collection device provided in Example 1 of the present utility model;
[0034] Figure 4 This is a structural schematic diagram of a rail grinding vehicle provided in Example 2 of the present utility model. DETAILED DESCRIPTION
[0035] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.
[0036] First, the following terms may be used in this article:
[0037] The term “and / or” means that either or both of them can be realized at the same time. For example, X and / or Y includes both “X” or “Y” and “X and Y”.
[0038] The terms "include," "comprises," "contains," "has," or other similar expressions should be interpreted as non-exclusive. For example, "including certain technical features (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products, or manufactured articles, etc.) should be interpreted as including not only the technical features explicitly listed, but also other technical features known in the art that are not explicitly listed.
[0039] The term "consisting of" excludes any technical features not explicitly listed. If used in a claim, this term renders the claim closed, excluding any technical features other than those explicitly listed, except for conventional impurities associated with them. If this term appears only in a clause of a claim, it limits only the elements explicitly listed in that clause; elements listed in other clauses are not excluded from the claim as a whole.
[0040] The term "parts by mass" refers to the mass ratio of multiple components. For example, if component X is x parts by mass and component Y is y parts by mass, then the mass ratio of component X to component Y is x:y. One part by mass can represent any mass, for example, 1 kg or 3.1415926 kg. The sum of the parts by mass of all components is not necessarily 100 parts; it can be greater than, less than, or equal to 100 parts. Unless otherwise specified, parts, ratios, and percentages herein are by mass.
[0041] Unless otherwise specified or limited, the terms "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this document based on specific circumstances.
[0042] When concentration, temperature, pressure, size or other parameters are expressed in the form of a numerical range, the numerical range should be understood to specifically disclose all ranges formed by the pairing of any upper limit, lower limit, or preferred value within the numerical range, regardless of whether the range is explicitly stated. For example, if a numerical range of "2 to 8" is stated, the numerical range should be interpreted as including ranges of "2 to 7," "2 to 6," "5 to 7," "3 to 4 and 6 to 7," "3 to 5 and 7," "2 and 5 to 7," etc. Unless otherwise specified, the numerical ranges stated herein include both their endpoints and all integers and fractions within the numerical range.
[0043] The terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation to this document.
[0044] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
[0045] Example 1
[0046] like Figures 2 to 3 As shown, an automatic dust discharge device for a dust collecting device of a rail grinding vehicle is used to automatically clean the dust in the dust collecting device 102; it includes two horizontally parallel tubular screw conveyors 1 and a driving mechanism 2; the tubular screw conveyor 1 includes a tubular barrel 11, spiral blades 12 and a spiral main shaft 13; the spiral blades 12 are fixed on the spiral main shaft 13 and installed in the tubular barrel 11 together with the spiral main shaft 13; its structure and working principle are similar to those of the well-known tubular screw conveyor. Those skilled in the art can design it by themselves according to technical parameters, such as the type, particle size, mass and output per unit time of dust, which will not be described in detail.
[0047] The tubular cylinder 11 is arranged at the bottom of the dust collecting device 102 and a dust inlet 111 is opened above the tubular cylinder 11 in the dust collecting device 102; both ends are installed on the frame 101 below the dust collecting device 102, and one end of the tubular cylinder 11 extends out of the frame 101 on one side and is provided with a dust outlet; specifically, the tubular cylinder 11 and the internal spiral main shaft 13 can be installed through shaft system parts such as bearings and bearing seats. It is not shown in the figure here, and those skilled in the art can design it by themselves, so it will not be repeated here.
[0048] The other end of the tubular body 11 extends beyond the frame 101 on the other side, and the drive mechanism 2 is mounted on the spiral main shaft 13 at the protruding end. Specifically, the tubular body 11 and the spiral main shaft 13 within it are mounted using shaft components such as bearings and bearing seats. The figure shows a bearing seat 14 with internal bearings to support the mounting of the spiral main shaft 13. The drive mechanism 2 is mounted on the end of the spiral main shaft 13. The specific installation method is described below. The spiral main shaft 13 described here is a hollow shaft. To reduce weight, the end of the shaft can be installed with a shaft plug for mounting components.
[0049] like Figure 2 and 3 As shown, the driving mechanism 2 includes a driving motor 21 , a driving chain transmission mechanism 22 , a primary driven chain transmission mechanism 23 , a secondary driven chain transmission mechanism 24 and a main transmission shaft 25 .
[0050] The main drive shaft 25 has an axis parallel to the axis of the spiral spindle 13 and is located behind the vehicle frame 101 on the side where the spiral spindle 13 extends. The drive motor 21 is mounted behind the vehicle frame 101 on the side where the spiral spindle 13 extends. Specifically, a motor bracket 27 is provided at the rear of the vehicle frame 101. The motor bracket 27 is fixed to the rear of the vehicle frame 101, and the drive motor 21 is mounted on the motor bracket 27. Of course, the drive motor 21 can include a motor and a reducer, or it can be a motor alone, or a motor with an integrated reducer. The output shaft of the motor 21 has an axis parallel to the axis of the spiral spindle 13. Of course, the output shaft of the motor 21 here can also refer to the output shaft of the reducer. The main drive shaft 25 is mounted by a main shaft bracket 28 at the rear of the vehicle frame 101. The main shaft bracket 28 is divided into two parts: one mounted on the inner side of the vehicle frame 101, and the other mounted below and outside the motor bracket 27. The main drive shaft 25 is also mounted using shaft components such as bearings and bearing seats. The specific installation method can be designed by those skilled in the art and will not be detailed here.
[0051] The main drive chain transmission mechanism 22 connects the output shaft of the motor 21 with the main drive shaft 25. Specifically, the driving chain transmission mechanism 22 includes a driving main sprocket 221, a main drive chain 222, and a driving slave sprocket 223. The driving main sprocket 221 is mounted on the output shaft of the motor 21; the driving slave sprocket 223 is mounted on the main drive shaft 25; and the main drive chain 222 connects the driving main sprocket 221 and the driving slave sprocket 223. The specific installation method can be designed by those skilled in the art and will not be described in detail here.
[0052] The primary driven chain transmission mechanism 23 connects the main transmission shaft 25 and a spiral main shaft 13. The primary driven chain transmission mechanism 23 includes a primary driven main sprocket 231, a primary driven chain 232, and a primary driven slave sprocket 233. The primary driven main sprocket 231 is mounted on the main transmission shaft 25; the primary driven slave sprocket 233 is mounted on a spiral main shaft 13; and the primary driven chain 232 connects the primary driven main sprocket 231 and the primary driven slave sprocket 233. The specific installation method can be designed by those skilled in the art and will not be described in detail here.
[0053] At the same time, a tensioning mechanism 26 is also included. The tensioning mechanism 26 is fixed to the outside of the vehicle frame 101 and tensions the primary driven chain 232. The tensioning mechanism 26 includes a fixed bracket 261 and a tensioning sprocket 262. The fixed bracket 261 is provided with a vertical slide 263. The pin 264 of the tensioning sprocket 262 is installed in the vertical slide 263 and moves up and down to tension the primary driven chain 232. The specific installation method can be designed by those skilled in the art and will not be described in detail.
[0054] A secondary driven chain transmission mechanism 24 connects the two spiral main shafts 13. The secondary driven chain transmission mechanism 24 includes a secondary driven main sprocket 241, a secondary driven chain 242, and a secondary driven slave sprocket 233. The secondary driven main sprocket 241 is mounted on one spiral main shaft 13; the secondary driven slave sprocket 243 is mounted on the other spiral main shaft 13; and the secondary driven chain 242 connects the secondary driven main sprocket 241 and the secondary driven slave sprocket 243. The specific installation method can be designed by those skilled in the art and will not be described in detail here.
[0055] At the same time, a tensioning mechanism 26 is also included. The tensioning mechanism 26 is fixed to the outside of the vehicle frame 101 and tensions the secondary driven chain 242. The tensioning mechanism 26 includes a fixed bracket 261 and a tensioning sprocket 262. The fixed bracket 261 is provided with a vertical slide 263. The pin 264 of the tensioning sprocket 262 is installed in the vertical slide 263 and moves up and down to tension the secondary driven chain 242. The specific installation method can be designed by those skilled in the art and will not be described in detail.
[0056] When the drive motor 21 is in operation, it drives the main drive shaft 25 via the active chain transmission mechanism 22. The main drive shaft 25 drives one spiral main shaft 13 via the primary driven chain transmission mechanism 23, and the secondary driven chain transmission mechanism 24 drives the other spiral main shaft 13. This enables the two tubular screw conveyors 1 to operate, automatically clearing dust from the dust collection device 102. Specifically, the drive mechanism 2 drives the spiral blades 12 via the spiral main shaft 13 to rotate and push dust forward, automatically drawing the dust into the dust inlet 111 and discharging it from the dust outlet, thus automatically clearing the dust from the dust collection device 102.
[0057] Example 2
[0058] like Figure 4 As shown, a rail grinding vehicle includes a vehicle frame 101, on which a dust collecting device 102 is mounted. The automatic dust discharge device for the rail grinding vehicle dust collecting device described in Example 1 is mounted on the vehicle frame 101 at the bottom of the dust collecting device 102, automatically cleaning dust within the dust collecting device 102. A drive mechanism 2 drives a tubular screw conveyor 1, pushing dust forward and automatically discharging the dust, thereby automatically cleaning dust within the dust collecting device 102.
[0059] This system effectively replaces manual dust removal from the dust collector. Without changing the original sanding machine layout, it utilizes existing space to compactly arrange and install all necessary components. Within the limited installation space, it safely and efficiently transmits motor power to the tubular screw conveyor. It effectively conveys dust from the dust collector to the exterior of the sanding machine, making it easier for the operator to collect and remove dust. This system also satisfies installation requirements without altering the machine frame structure.
[0060] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.
Claims
1. An automatic dust discharge device for a dust collecting device of a rail grinding vehicle, used for automatically cleaning dust in the dust collecting device (102); characterized in that: It comprises two horizontally parallel arranged tubular screw conveyors (1) and a driving mechanism (2); The tubular screw conveyor (1) comprises a tubular barrel (11), a spiral blade (12) and a spiral main shaft (13); the spiral blade (12) is fixed on the spiral main shaft (13) and is installed in the tubular barrel (11) together with the spiral main shaft (13); The tubular cylinder (11) is arranged at the bottom of the dust collecting device (102) and a dust inlet (111) is opened above the tubular cylinder (11) in the dust collecting device (102); both ends are mounted on a frame (101) below the dust collecting device (102); one end extends out of the frame (101) on one side and is provided with a dust outlet; the other end extends out of the frame (101) on the other side and a driving mechanism (2) is mounted on the spiral main shaft (13) at the extended end; The driving mechanism (2) drives the spiral blade (12) to rotate and push the dust forward through the spiral main shaft (13), automatically sucking the dust from the dust inlet (111) and discharging it from the dust outlet, and automatically cleaning the dust in the dust collecting device (102).
2. The automatic dust discharge device for the rail grinding vehicle dust collection device according to claim 1, characterized in that: The spiral main shaft (13) is a hollow shaft.
3. The automatic dust discharge device for the rail grinding vehicle dust collection device according to claim 1 or 2, characterized in that: The driving mechanism (2) comprises a driving motor (21), a driving chain transmission mechanism (22), a primary driven chain transmission mechanism (23), a secondary driven chain transmission mechanism (24) and a main transmission shaft (25); The main transmission shaft (25) is parallel to the axis of the spiral main shaft (13) and is arranged behind the vehicle frame (101) on the side where the spiral main shaft (13) extends out; the driving motor (21) is installed behind the vehicle frame (101) on the side where the spiral main shaft (13) extends out; the output shaft axis of the motor (21) is parallel to the axis of the spiral main shaft (13); The main transmission chain transmission mechanism (22) connects the output shaft of the motor (21) and the main transmission shaft (25); A primary driven chain transmission mechanism (23) connects the main transmission shaft (25) and a spiral main shaft (13); A secondary driven chain transmission mechanism (24) connects the two spiral main shafts (13); The driving motor (21) drives the main transmission shaft (25) to rotate through the active chain transmission mechanism (22), the main transmission shaft (25) drives one spiral main shaft (13) to rotate through the primary driven chain transmission mechanism (23), and the secondary driven chain transmission mechanism (24) drives the other spiral main shaft (13) to rotate; the two tubular screw conveyors (1) are operated to automatically clean the dust in the dust collecting device (102).
4. The automatic dust discharge device for the rail grinding vehicle dust collection device according to claim 3, characterized in that: The active chain transmission mechanism (22) comprises an active main sprocket (221), a main transmission chain (222) and an active slave sprocket (223); The driving main sprocket (221) is mounted on the output shaft of the motor (21); the driving slave sprocket (223) is mounted on the main transmission shaft (25); and the main transmission chain (222) connects the driving main sprocket (221) and the driving slave sprocket (223).
5. The automatic dust discharge device for the rail grinding vehicle dust collection device according to claim 3, characterized in that: The primary driven chain transmission mechanism (23) comprises a primary driven main sprocket (231), a primary driven chain (232) and a primary driven slave sprocket (233); A primary driven main sprocket (231) is mounted on a main transmission shaft (25); a primary driven slave sprocket (233) is mounted on a spiral main shaft (13); and a primary driven chain (232) connects the primary driven main sprocket (231) and the primary driven slave sprocket (233).
6. The automatic dust discharge device for the rail grinding vehicle dust collection device according to claim 5, characterized in that: It also includes a tensioning mechanism (26), which is fixed to the outside of the vehicle frame (101) and tensions the primary driven chain (232); The tensioning mechanism (26) includes a fixed bracket (261) and a tensioning sprocket (262). The fixed bracket (261) is provided with a vertical slide groove. The pin shaft of the tensioning sprocket (262) is installed in the vertical slide groove and moves up and down to tension the primary driven chain (232).
7. The automatic dust discharge device for the rail grinding vehicle dust collection device according to claim 3, characterized in that: The secondary driven chain transmission mechanism (24) comprises a secondary driven main sprocket (241), a secondary driven chain (242) and a secondary driven slave sprocket (233); The secondary driven main sprocket (241) is mounted on a spiral main shaft (13); the secondary driven slave sprocket (243) is mounted on another spiral main shaft (13); and the secondary driven chain (242) connects the secondary driven main sprocket (241) and the secondary driven slave sprocket (243).
8. The automatic dust discharge device for the rail grinding vehicle dust collection device according to claim 7, characterized in that: It also includes a tensioning mechanism (26), which is fixed to the outside of the vehicle frame (101) and tensions the secondary driven chain (242); The tensioning mechanism (26) includes a fixed bracket (261) and a tensioning sprocket (262). The fixed bracket (261) is provided with a vertical slide groove. The pin shaft of the tensioning sprocket (262) is installed in the vertical slide groove and moves up and down to tension the secondary driven chain (242).
9. A rail grinding vehicle, comprising a vehicle frame (101), on which a dust collecting device (102) is mounted; characterized in that: The automatic dust discharge device for the rail grinding vehicle dust collecting device according to any one of claims 1 to 8 is installed on the vehicle frame (101) at the bottom of the dust collecting device (102) to automatically clean the dust in the dust collecting device (102).