Rail clamping fixing device and rail moving equipment

Through the design of the clamp arm and limit plate of the clamp rail fixing device, the problem of vibration displacement of the rail mobile device in the working position is solved, and the stable fixation and rapid position switching of the device are achieved.

CN223073276UActive Publication Date: 2025-07-08NINGBO IRON & STEEL
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Patent Information

Application Number
CN202422182656.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-06
Publication Date
2025-07-08
Estimated Expiration
2034-09-06

AI Technical Summary

Technical Problem

Existing rail mobile devices are easily displaced due to vibration when working at the working position, resulting in the inability to remain stable in position.

Method used

The clamping rail fixing device is adopted, including a mounting plate, a limiting plate and a clamping arm. The side wall of the track is clamped by the clamping arm and the rotation of the clamping arm is restricted by the limiting portion of the limiting plate, thereby achieving reliable fixation and rapid release of the equipment.

Benefits of technology

The tracked mobile device is reliably clamped and fixed in the working position and the maintenance position, and can quickly switch positions, avoiding displacement problems caused by vibration.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a rail clamping fixing device and rail moving equipment, and relates to the technical field of engineering machinery, the rail clamping fixing device comprises a mounting plate, a limiting plate and two clamping arms, the mounting plate is used for being mounted on the rail moving equipment connected to a rail in a sliding mode, the two clamping arms are both connected to the mounting plate in a rotating mode, and the limiting plate is used for limiting the rail moving equipment. The two clamping arms are used for clamping the two side walls of the track so as to limit movement of the track moving equipment, the limiting plate is used for being placed at the ends, away from the track, of the two clamping arms so as to limit rotation of the two clamping arms, and a first limiting part is arranged on one end face of the limiting plate; and two second limiting parts are arranged on the other end surface of the limiting plate at intervals. Compared with the prior art, the rail clamping and fixing device has the advantages that the rail moving equipment can be reliably clamped and fixed at a working position and an overhauling position, the fixation is convenient to release, and the switching can be quickly realized.
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Description

Technical Field

[0001] The utility model relates to the technical field of construction machinery, and in particular, to a rail clamping and fixing device and a rail-mounted mobile device. Background Art

[0002] Rail-mounted mobile devices generally refer to devices operating on specific rails. For example, a mobile vibrating screen is slidably connected to the rail. The mobile vibrating screen has a working position and a maintenance position, and the mobile vibrating screen can move along the rail to switch between the working position and the maintenance position. However, when the device is working at the working position, it may move along the rail, resulting in abnormal operation. For example, when the mobile vibrating screen is in the working state at the working position, it will generate vibrations itself, which will cause the mobile vibrating screen to move on the rail and cannot be stably maintained at the corresponding position. Summary of the Utility Model

[0003] The problem to be solved by the utility model is: how to reliably fix the mobile device at the working position and quickly release the fixation to enable the mobile device to move.

[0004] The utility model provides a rail clamping and fixing device, including: a mounting plate, a limiting plate and clamping arms. The mounting plate is used for mounting on a rail-mounted mobile device slidably connected to the rail. The two clamping arms are both rotatably connected to the mounting plate. The two clamping arms are used for clamping the two side walls of the rail to limit the movement of the rail-mounted mobile device. The limiting plate is used for placing at one end of the two clamping arms away from the rail to limit the rotation of the two clamping arms. One end face of the limiting plate is provided with a first limiting portion, and two second limiting portions are spaced apart on the other end face of the limiting plate. When the two clamping arms are in the clamping state, the end face of the limiting plate with the first limiting portion is used for facing and placing against the two clamping arms, and the first limiting portion abuts between the opposite side walls of the two clamping arms to limit the two clamping arms from rotating away from the rail. When the two clamping arms are in the released clamping state, the end face of the limiting plate with the two second limiting portions is used for facing and placing against the two clamping arms, and the two second limiting portions respectively abut against the opposite side walls of the two clamping arms to limit the two clamping arms from rotating towards the rail.

[0005] The rail clamping and fixing device provided by the utility model, compared with the prior art, has but is not limited to the following beneficial effects:

[0006] The rail clamping and fixing device described in the present utility model can be installed on a rail-mounted mobile device (such as a mobile vibrating screen) through a mounting plate. When the rail-mounted mobile device is in the tooling state at the working position, this device needs to fix the rail-mounted mobile device at the working position to stably maintain it in the corresponding position. Specifically, rotate the two clamping arms to a state of clamping the rail, then place the limiting plate at one end of the two clamping arms away from the rail, and abut the first limiting portion between the opposite side walls of the two clamping arms. The first limiting portion is used to limit the rotation of the two clamping arms (the ends in contact with the rail) away from the rail direction, so that there will be no loosening or displacement between the two clamping arms and the rail; when the rail-mounted mobile device needs to move from the working position to the maintenance position, for example, when the mobile vibrating screen needs to replace the sieve plate and other maintenance operations and needs to move to the maintenance position and be reliably clamped and fixed, first remove the limiting plate from the two clamping arms, then rotate the two clamping arms to a state of contacting and clamping the rail, then place the limiting plate at one end of the two clamping arms away from the rail, and abut the two second limiting portions between the opposite side walls of the two clamping arms to prevent the two clamping arms (the ends in contact with the rail) from rotating towards the rail direction under the action of gravity. After the rail-mounted mobile device moves to the maintenance position, remove the limiting plate from the two clamping arms, and the two clamping arms can rotate to a state of clamping the rail under the action of gravity, and then abut the first limiting portion of the limiting plate between the opposite side walls of the two clamping arms again, so that the rail-mounted mobile device can be fixed at the maintenance position. The rail clamping and fixing device of the present utility model, compared with the prior art, can reliably clamp and fix the rail-mounted mobile device at the working position and the maintenance position, and is convenient to release the fixation, and can quickly achieve switching.

[0007] Optionally, the clamping arm includes an arm body. First chutes are provided on the opposite side walls of one end of the arm bodies of the two clamping arms away from the rail. The first limiting portion has an isosceles trapezoidal block structure, and the first limiting portion is used to be embedded in the two first chutes to limit the rotation of the two clamping arms.

[0008] Optionally, second chutes are provided on the opposite side walls of one end of the arm bodies of the two clamping arms away from the rail. The two second limiting portions both have a rectangular block structure, and the two second limiting portions are used to be respectively embedded in the two second chutes to limit the rotation of the two clamping arms.

[0009] Optionally, the arm body includes a first section and a second section connected to each other from top to bottom. The included angle between the first section and the second section is an obtuse angle. When the second sections of the two clamping arms rotate towards each other, the first sections of the two clamping arms rotate away from each other.

[0010] Optionally, when the limit plate is removed from the two clamping arms, the second segments of the two clamping arms tend to rotate towards each other under the action of gravity.

[0011] Optionally, grooves are provided between the first segment and the second segment of each of the two clamping arms, and the connecting portion of the first segment and the second segment of each clamping arm is inserted into the groove of the other clamping arm. The two clamping arms are rotatably connected to the mounting plate through a rotating shaft at the two grooves.

[0012] Optionally, the arm body further includes a hook segment, and the hook segment is arranged at the end of the second segment away from the first segment. The hook segment is used to abut against the lower inclined surfaces on both sides of the upper flange of the track.

[0013] Optionally, the included angle between the hook segment and the second segment is a right angle or an acute angle.

[0014] Optionally, wear-resistant rubber is provided on the contact surface of the hook segment for contacting the track.

[0015] In addition, the present invention further provides a rail-mounted mobile device, including the rail clamping and fixing device as described above.

[0016] Since the technical improvement and technical effects of the rail-mounted mobile device are the same as those of the rail clamping and fixing device, the technical effects of the rail-mounted mobile device will not be described in detail herein. Description of the Drawings

[0017] Figure 1 The front view of the rail clamping and fixing device of the embodiment of the present utility model when it is in the unclamped state;

[0018] Figure 2 The front view of the rail clamping and fixing device of the embodiment of the present utility model when it is in the clamped state;

[0019] Figure 3 The front view of the arm body of the embodiment of the present utility model;

[0020] Figure 4 The side view of the arm body of the embodiment of the present utility model;

[0021] Figure 5 The front view of the rail clamping and fixing device of the embodiment of the present utility model installed on a rail-mounted mobile device.

[0022] Description of the Reference Numerals:

[0023] 1. Mounting plate; 2. Limiting plate; 21. First limiting part; 22. Second limiting part; 3. Arm body; 31. First section; 32. Second section; 33. Hook section; 34. First chute; 35. Second chute; 36. Groove; 37. Wear-resistant rubber; 4. Track; 5. Rail-mounted mobile device. Detailed implementation manners

[0024] To make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings.

[0025] In the description of the present utility model, the orientation or positional relationship indicated by "upper", "lower", "left", "right", "top", "bottom", "front", "rear", "inner" and "outer" is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model, rather than indicating or implying that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the protection scope of the present utility model.

[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected" and "connected" should 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; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. 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 situations.

[0027] In the description of this specification, the descriptions referring to terms such as "embodiment", "one embodiment" and "one implementation manner" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or implementation manner are included in at least one embodiment or implementation manner of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or implementation manner. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or implementation manners in a suitable manner.

[0028] Moreover, in the accompanying drawings, the Z-axis represents the vertical direction, that is, the up and down positions, and the positive direction of the Z-axis (that is, the direction of the arrow of the Z-axis) represents up, and the negative direction of the Z-axis (that is, the direction opposite to the positive direction of the Z-axis) represents down; the X-axis in the accompanying drawings represents the horizontal direction, that is, the left and right positions, and the positive direction of the X-axis (that is, the direction of the arrow of the X-axis) represents left, and the negative direction of the X-axis (that is, the direction opposite to the positive direction of the X-axis) represents right.

[0029] It should be noted that the meanings represented by the foregoing Z-axis and X-axis are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated device or element 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.

[0030] As Figure 1 , 2 and as shown in Figure 5, the rail clamping and fixing device of the embodiment of the present utility model includes: a mounting plate 1, a limiting plate 2 and clamping arms. The mounting plate 1 is used to be mounted on a rail-mounted mobile device 5 slidably connected to a rail 4. The two clamping arms are both rotatably connected to the mounting plate 1. The two clamping arms are used to clamp the two side walls of the rail 4 to limit the movement of the rail-mounted mobile device 5. The limiting plate 2 is used to be placed at one end of the two clamping arms away from the rail 4 to limit the rotation of the two clamping arms. Wherein, a first limiting portion 21 is provided on one end face of the limiting plate 2, and two second limiting portions 22 are spaced apart on the other end face of the limiting plate 2. When the two clamping arms are in a clamping state, the end face of the limiting plate 2 having the first limiting portion 21 is used to face the two clamping arms and place, and the first limiting portion 21 abuts between the opposite side walls of the two clamping arms to limit the two clamping arms from rotating away from the rail 4. When the two clamping arms are in a released clamping state, the end face of the limiting plate 2 having the two second limiting portions 22 is used to face the two clamping arms and place, and the two second limiting portions 22 respectively abut against the opposite side walls of the two clamping arms to limit the two clamping arms from rotating towards the rail 4.

[0031] In this embodiment, in combination with the attached Figure 1 , attached Figure 2 and attached Figure 5As shown in the figure, this rail clamping and fixing device can be installed on the rail-mounted mobile device 5 (such as a mobile vibrating screen) through the mounting plate 1. When the rail-mounted mobile device 5 is in the tooling state at the working position, this device needs to fix the rail-mounted mobile device at the working position to keep it stable at the corresponding position. Specifically, rotate the two clamping arms to the state of clamping the rail 4, then place the limiting plate 2 at one end of the two clamping arms away from the rail 4, and abut the first limiting portion 21 between the opposite side walls of the two clamping arms. The first limiting portion 21 is used to limit the rotation of the two clamping arms (the ends in contact with the rail 4) away from the rail 4, so that there will be no loosening and displacement between the two clamping arms and the rail 4; when the rail-mounted mobile device 5 needs to move from the working position to the maintenance position, for example, when the mobile vibrating screen needs to perform maintenance work such as replacing the sieve plate, the rail-mounted mobile device 5 needs to be moved to the maintenance position and during this process, the two clamping arms are in the state of releasing the clamping of the rail 4. First, remove the limiting plate 2 from the two clamping arms, then rotate the two clamping arms away from the rail to the state of releasing the clamping of the rail 4, then place the limiting plate 2 at one end of the two clamping arms away from the rail 4, and abut the two second limiting portions 22 against the opposite side walls of the two clamping arms to prevent the two clamping arms (the ends in contact with the rail) from rotating towards the rail 4 under the action of gravity, which may cause interference with the rail and affect the movement of the rail-mounted mobile device 5. After the rail-mounted mobile device 5 moves to the maintenance position, remove the limiting plate 2 from the two clamping arms, and the two clamping arms can rotate to the state of clamping the rail 4 under the action of gravity, and then abut the first limiting portion 21 of the limiting plate 2 between the opposite side walls of the two clamping arms again, so that the rail-mounted mobile device 5 can be fixed at the maintenance position. The rail clamping and fixing device of the present utility model, compared with the prior art, can reliably clamp and fix the rail-mounted mobile device at the working position and the maintenance position, and is convenient to release the fixation, and can quickly realize the switching between position locking and unlocking.

[0032] It should be noted that the two clamping arms can be rotatably connected to the mounting plate 1 through a single rotating shaft, or can be rotatably connected to the mounting plate 1 through two rotating shafts respectively. The two clamping arms are symmetrically arranged, as shown in the attached Figure 1 and 2 figures. The axis of symmetry of the two clamping arms extends along the Z-axis and passes through the railway track (rail 4). Combining the attached Figure 1 and the attached Figure 5 figures, the mounting plate 1 is installed on the rail-mounted mobile device 5 in a vertical state (the Z-axis direction in the attached Figure 1 figure), and the limiting plate 2 is placed horizontally (the X-axis direction in the attached Figure 1 figure) at the upper ends of the two clamping arms. The limiting plate 2 prevents materials from falling into the openings at the upper ends of the two clamping arms. The taking, placing and turning operations of the limiting plate 2 can all be realized manually by the staff.

[0033] Optionally, the clamping arm includes an arm body 3, and the two side walls opposite to each other at one end of the arm body 3 of the two clamping arms away from the track 4 are provided with a first sliding groove 34, and the first limiting portion 21 is an isosceles trapezoidal block structure, and the first limiting portion 21 is used to be embedded in the two first sliding grooves 34 to limit the rotation of the two clamping arms.

[0034] In this embodiment, combined with the attached Figures 1 to 4 As shown, one end of the arm body 3 for contacting with the track 4 is the lower end of the arm body 3, and the other end is the upper end of the arm body 3, wherein the two side walls opposite to the upper ends of the arm bodies 3 of the two clamping arms are provided with first slide grooves 34, and a first limiting portion 21 is provided at the center position of one end surface of the limiting plate 2, wherein the first limiting portion 21 is an isosceles trapezoidal block structure, which is to adapt to the V-shaped space structure at the angle between the upper ends of the two clamping arms, and the two first limiting portions 21 are provided on the two side walls of the V-shaped space structure, and the first limiting portions 21 can be from top to bottom (attached Figure 1 or attached Figure 2 The two clamp arms are embedded in the two first limit portions 21 in the Z-axis direction, thereby limiting the rotation of the two clamp arms. Figure 2 As shown, the two clamping arms are in a state of clamping the rail 4 , and the deeper the first limiting portion 21 is embedded downward, the greater the clamping force of the two clamping arms.

[0035] Optionally, the two side walls of the arm body 3 of the two clamping arms that are opposite to each other at one end away from the track 4 are both provided with second sliding grooves 35, and the two second limiting portions 22 are both rectangular block structures, and the two second limiting portions 22 are used to be respectively embedded in the two second sliding grooves 35 to limit the rotation of the two clamping arms.

[0036] In this embodiment, combined with the attached Figures 1 to 4 As shown, the two side walls of the arm body 3 of the two clamping arms away from the track 4 are provided with second sliding grooves 35, and two second limiting portions 22 are arranged at intervals on one end surface of the limiting plate 2 (the end surface away from the first limiting portion 21), wherein the two second limiting portions 22 are both rectangular block structures, combined with the attached Figure 2 As shown, the two clamping arms can be manually rotated to a state where the clamping rail 4 is released, and then the limiting plate 2 is manually placed on the upper ends of the two clamping arms, and the two second limiting portions 22 are respectively embedded in the two second sliding grooves 35, thereby limiting the rotation of the two clamping arms. Figure 1 As shown, when the two clamping arms are in a state of releasing the clamping track 4 , without the limiting plate 2 , the two clamping arms will rotate toward the track 4 under the action of their own gravity, thereby affecting the movement of the rail-mounted moving device 5 on the track 4 .

[0037] Optionally, the arm body 3 includes a first section 31 and a second section 32 that are connected to each other from top to bottom. The angle between the first section 31 and the second section 32 is an obtuse angle. When the second sections 32 of the two clamping arms rotate towards each other, the first sections 31 of the two clamping arms rotate away from each other.

[0038] In this embodiment, in combination with the attached Figure 1 and the attached Figure 3 As shown, the arm body 3 includes a first section 31 and a second section 32 that are connected to each other from top to bottom. The angle between the first section 31 and the second section 32 is an obtuse angle. The position where the arm body 3 is rotatably connected to the mounting plate 1 is between the first section 31 and the second section 32. In this way, when the first section 31 rotates to the left, it will drive the second section 32 to rotate to the right. Similarly, when the second sections 32 of the two clamping arms rotate towards each other, the first sections 31 of the two clamping arms rotate away from each other.

[0039] Optionally, when the limiting plate 2 is removed from the two clamping arms, the second sections 32 of the two clamping arms tend to rotate towards each other under the action of gravity.

[0040] In this embodiment, in combination with the attached Figure 1 As shown, when the two clamping arms are in a state of releasing the clamping of the track 4, without the limitation of the limiting plate 2, the two clamping arms (the second sections 32) will rotate towards the direction close to the track 4 under the action of their own gravity, thus affecting the movement of the rail-mounted mobile device 5 on the track 4.

[0041] Optionally, grooves 36 are provided between the first section 31 and the second section 32 of each of the two clamping arms. The connecting part of the first section 31 and the second section 32 of each clamping arm is inserted into the groove 36 of the other clamping arm. The two clamping arms are rotatably connected to the mounting plate 1 through a rotating shaft at the two grooves 36.

[0042] In this embodiment, in combination with the attached Figure 3 and the attached Figure 4 As shown, grooves 36 are provided between the first section 31 and the second section 32 of the two clamping arms. The two clamping arms can be assembled together through the grooves 36 thereon, that is, the two grooves 36 are in face-to-face contact, which can make the two clamping arms rotate in the same plane without interference. In this way, the two clamping arms can be rotatably connected to the mounting plate 1 through a rotating shaft at the two grooves 36.

[0043] Optionally, the arm body 3 further includes a hook segment 33, which is provided at the end of the second segment 32 away from the first segment 31, and the hook segment 33 is used to abut against the lower inclined surfaces on both sides of the upper flange of the track 4.

[0044] In this embodiment, in combination with the attached Figure 1 and the attached Figure 3 As shown, a hook segment 33 is provided at the end of the second segment 32 away from the first segment 31. The hook segment 33 can abut against the lower inclined surfaces on both sides of the upper flange of the track 4, so that the contact area between the clamping arm and the track 4 can be increased, and a better clamping effect can be achieved.

[0045] Optionally, the angle between the hook segment 33 and the second segment 32 is a right angle or an acute angle.

[0046] In this embodiment, in combination with the attached Figure 3 As shown, the angle between the hook segment 33 and the second segment 32 is a right angle or an acute angle, and the bending direction of the hook segment 33 is opposite to that of the first segment 31.

[0047] Optionally, wear-resistant rubber 37 is provided on the contact surface of the hook segment 33 for contacting the track 4.

[0048] In this embodiment, in combination with the attached Figure 2 As shown, wear-resistant rubber 37 is provided on the contact surface of the hook segment 33 for contacting the track 4, and the wear-resistant rubber 37 plays a role in protecting the track 4 and damping vibration.

[0049] Optionally, wear-resistant rubber is provided on the contact surface of the hook segment for contacting the track.

[0050] In addition, the present invention also provides a rail-mounted mobile device, including the rail clamping and fixing device as described above.

[0051] Since the technical improvement and the achieved technical effects of the rail-mounted mobile device are the same as those of the rail clamping and fixing device, the technical effects of the rail-mounted mobile device will not be described in detail herein.

[0052] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0053] Although the present utility model is disclosed as above, the protection scope of the present utility model is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present utility model, and these changes and modifications will all fall within the protection scope of the present utility model.

Claims

1. A rail clamping and fixing device, characterized in that, Comprising: A mounting plate (1), a limiting plate (2) and clamping arms. The mounting plate (1) is used to be mounted on a rail-mounted mobile device (5) that is slidably connected to a rail (4). Both of the clamping arms are rotatably connected to the mounting plate (1). The two clamping arms are used to clamp both side walls of the rail (4) to limit the movement of the rail-mounted mobile device (5). The limiting plate (2) is used to be placed at one end of the two clamping arms away from the rail (4) to limit the rotation of the two clamping arms. Wherein, a first limiting portion (21) is provided on one end face of the limiting plate (2), and two second limiting portions (22) are spaced apart on the other end face of the limiting plate (2); when the two clamping arms are in a clamping state, the end face of the limiting plate (2) having the first limiting portion (21) is used to face the two clamping arms, and the first limiting portion (21) abuts between the opposite side walls of the two clamping arms to limit the two clamping arms from rotating away from the rail (4); when the two clamping arms are in a state of releasing the clamping, the end face of the limiting plate (2) having the two second limiting portions (22) is used to face the two clamping arms, and the two second limiting portions (22) respectively abut against the opposite side walls of the two clamping arms to limit the two clamping arms from rotating towards the rail (4).

2. The rail clamping and fixing device according to claim 1, characterized in that, The clamping arm includes an arm body (3). On both opposite side walls of the end of the arm body (3) of the two clamping arms away from the rail (4), first sliding grooves (34) are provided. The first limiting portion (21) is in an isosceles trapezoidal block structure, and the first limiting portion (21) is used to be inserted into the two first sliding grooves (34) to limit the rotation of the two clamping arms.

3. The rail clamping and fixing device according to claim 2, characterized in that, On both opposite side walls of the end of the arm body (3) of the two clamping arms away from the rail (4), second sliding grooves (35) are provided. Both of the two second limiting portions (22) are in rectangular block structures, and the two second limiting portions (22) are used to be respectively inserted into the two second sliding grooves (35) to limit the rotation of the two clamping arms.

4. The rail clamping and fixing device according to claim 2, wherein The arm body (3) includes a first section (31) and a second section (32) that are connected to each other from top to bottom. The included angle between the first section (31) and the second section (32) is an obtuse angle. When the second sections (32) of the two clamping arms rotate towards each other, the first sections (31) of the two clamping arms rotate away from each other.

5. The rail clamping and fixing device according to claim 4, characterized in that, When the limiting plate (2) is removed from the two clamping arms, the second sections (32) of the two clamping arms tend to rotate towards each other under the action of gravity.

6. The rail clamping and fixing device according to claim 4, characterized in that Grooves (36) are provided between the first sections (31) and the second sections (32) of the two clamping arms. The connecting portions of the first sections (31) and the second sections (32) of each clamping arm are inserted into the grooves (36) of the other clamping arm. The two clamping arms are rotatably connected to the mounting plate (1) through a rotating shaft at the two grooves (36).

7. The rail clamping and fixing device according to claim 4, wherein, The arm body (3) further includes a hook section (33), the hook section (33) is arranged at the end of the second section (32) away from the first section (31), and the hook section (33) is used to abut against the lower inclined surfaces on both sides of the upper flange of the track (4).

8. The rail clamping and fixing device according to claim 7, characterized in that, The included angle between the hook section (33) and the second section (32) is a right angle or an acute angle.

9. The rail clamping and fixing device according to claim 7, characterized in that, A wear-resistant rubber (37) is arranged on the contact surface of the hook section (33) for contacting the track (4).

10. A rail-mounted mobile device, characterized in that, It includes the rail clamping and fixing device according to any one of claims 1-9.