Mounting structure for GNSS (Global Navigation Satellite System) positioning terminal

Abstract

The utility model discloses an installation structure for a GNSS positioning terminal, which comprises a bottom plate, a rotation adjusting mechanism, an installation adjusting mechanism and a clamping fixing mechanism, the rotation adjusting mechanism comprises a longitudinal plate, a rotating plate, a rotating shaft assembly and a hydraulic cylinder, and the installation adjusting mechanism comprises a navigation assembly, an adjusting plate, a clamping rod, a clamping pipe, a lock frame, a clamping groove, a longitudinal moving ring and a connecting groove. The supine angle of the rotating plate is adjusted through stretching and retracting of the hydraulic cylinder, it is ensured that the angle of the positioning terminal can be adjusted according to different installation requirements or environment changes, multiple sets of adjusting holes are formed in the rotating plate, stable installation and adjustment of a clamping rod are ensured, the operation flexibility is improved, the clamping rod can stretch into a clamping pipe, and through cooperation of a clamping groove and a locking frame, the clamping rod can be conveniently and rapidly installed and adjusted. The clamping rod is quickly fixed, and the operation convenience and reliability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to fixed installation technical field more specifically, it relates to a kind of installation structure for GNSS positioning terminal. BACKGROUND

[0002] The existing installation structure can usually only install positioning terminal at fixed angle, cannot adjust supine angle according to different installation needs or environmental change, lack angle adjusting function, leading to that the use effect of positioning terminal in different environments is poor, especially in complex terrain or special application scene, fixed angle installation can lead to that the antenna of positioning terminal cannot best align satellite, influence signal receiving effect, reduce positioning precision.

[0003] The existing installation structure can usually only install positioning terminal at fixed position, cannot adjust installation position according to actual demand, lack position adjusting function, leading to that the use effect of positioning terminal in different application scenes is poor, especially in the scene needing multipoint installation or mobile installation, fixed position installation limits the use range of positioning terminal, increases the complexity and cost of installation, cannot flexibly adjust installation position according to actual demand, influence the use effect and reliability of positioning terminal.

[0004] The existing installation structure is not firm when installing positioning terminal, is easy to slacken or fall off, lack effective fixing and stabilizing measure, leading to that positioning terminal is susceptible to external environment in use process, such as vibration, wind power etc., installation instability can lead to that positioning terminal falls off or shifts in use process, influence positioning precision and reliability, need frequent inspection and maintenance, increase maintenance cost and workload. UTILITY MODEL CONTENT

[0005] (I) technical problem solved

[0006] In view of the problems in the prior art, the utility model provides an installation structure for GNSS positioning terminal to solve the technical problems mentioned in the background art, such as inconvenient to adjust the supine angle of positioning terminal, difficult to adapt to different installation needs or environmental change, inconvenient to adjust the installation position of positioning terminal, etc.

[0007] (II) technical scheme

[0008] To achieve the above object, the utility model provides following technical scheme: A kind of installation structure for GNSS positioning terminal, including bottom plate, rotating adjusting mechanism, installation adjustment mechanism and clamping fixed mechanism, the rotating adjusting mechanism includes vertical plate, rotating plate, pivot assembly and hydraulic cylinder, vertical plate is installed in one end of rotating plate, one end of hydraulic cylinder is connected with vertical plate and rotates, the other end of hydraulic cylinder is connected with one end of rotating plate and rotates, one end of vertical plate is connected with one end of bottom plate by pivot assembly and rotates, the installation adjustment mechanism includes navigation component, adjustment plate, clamping rod, clamping pipe, lock frame, clamping groove, vertical shift ring and connecting groove, two ends of adjustment plate are installed navigation component, clamping rod is installed on adjustment plate, clamping rod can be inserted into the inside of clamping pipe, clamping groove is arranged on the side wall of clamping rod, lock frame is transversely slid and is arranged on the side wall of clamping pipe, vertical shift ring is longitudinally slid and is arranged on the outer wall of clamping pipe, connecting groove is arranged in the inside of vertical shift ring, one end of lock frame is slidably connected with connecting groove, vertical shift ring moves longitudinally, lock frame moves relatively in connecting groove, so that lock frame is inserted into or away from clamping groove.

[0009] The utility model further sets up, clamping fixed mechanism includes push ring, pressure block, pressure rod, pressure groove and tightening spring, push ring directional sliding is arranged on the outer wall of clamping pipe, pressure block is connected in the bottom of push ring, and the bottom end of push ring is connected with centripetal sliding, pressure rod is installed in the bottom of pressure block, tightening spring is installed between adjacent pressure block, pressure groove is arranged on the outer wall of vertical shift ring, and pressure rod can be pressed to pressure groove, so that vertical shift ring is fixed on the outer wall of clamping pipe.

[0010] The utility model further sets up, the side end top of bottom plate is equipped with support frame, and pivot assembly is installed in one end of support frame, and support frame ensures the stable installation of pivot assembly, and the reliability of operation is improved.

[0011] The utility model further sets up, adjusting hole is set up on rotating plate, and adjusting hole is provided with multiple groups, and each group of adjusting holes is arranged in parallel, and adjusting hole ensures the stable installation and adjustment of clamping rod, and the flexibility of operation is improved.

[0012] The utility model further sets up, and the bottom end of the side wall of clamping pipe is equipped with connecting plate, and connecting plate is fixedly installed in the bottom end of rotating plate, and each clamping pipe is communicated with adjusting hole, and connecting plate ensures the stable installation of clamping pipe, and the reliability of operation is improved.

[0013] The utility model further sets up, one end of clamping rod is inserted into rotating plate, and is inserted into different adjusting holes and is communicated with clamping pipe, and clamping rod is installed on adjustment plate, and is inserted into the inside of clamping pipe, and is communicated with clamping groove, so that the quick fixing of clamping rod is realized, and the convenience and reliability of operation are improved.

[0014] The utility model further sets up, the inner wall of pressure block is equipped with compression spring, and the other end of compression spring is contacted and is connected with the outer wall of joint pipe, and compression spring ensures the stable clamping force of pressure block, improves the reliability of operation.

[0015] The utility model further sets up, the side end and top end of bottom plate are equipped with mounting plate, and through the bolt of outside world passes through mounting plate and fixes the device in required position.

[0016] (Three) beneficial effect

[0017] Compared with the prior art, the utility model provides a kind of installation structure for GNSS positioning terminal, with following beneficial effects:

[0018] The utility model sets up rotating adjusting mechanism, realizes the supine angle adjustment of rotating plate by the extension of hydraulic cylinder, ensures that positioning terminal can adjust angle according to different installation needs or environmental change, and longitudinal plate is connected with bottom plate by pivot assembly, ensures the stable rotation of rotating plate, improves the reliability of operation, realizes multi-angle installation by the adjustment of hydraulic cylinder, ensures that the antenna of positioning terminal is best aligned satellite, improves signal receiving effect, can increase automatic adjusting function.

[0019] The utility model sets up installation adjusting mechanism, and rotating plate is equipped with multiple adjustment holes, ensures the stable installation and adjustment of joint rod, improves the flexibility of operation, joint rod can be inserted into the inside of joint pipe, realizes the quick fixing of joint rod by the cooperation of clamping groove and lock frame, improves the convenience and reliability of operation, lock frame is transversely slid and is set on the lateral wall of joint pipe, realizes the extension or away from clamping groove of lock frame by the cooperation of connecting groove, ensures the stable fixing of joint rod, and longitudinal shift ring is longitudinally slid and set on the outer wall of joint pipe, realizes the fixing of longitudinal shift ring by the cooperation of connecting groove, improves the stability of installation.

[0020] The utility model sets up joint fixing mechanism, push ring is directionally slid and set on the outer wall of joint pipe, pressure block is connected in the bottom of push ring, realizes the pressure of pressure rod to pressure groove by the centripetal sliding of pressure block, ensures the fixing of longitudinal shift ring, and tightening spring is installed between adjacent pressure block, ensures the stable clamping force of pressure block, improves the reliability of operation, and one end of joint rod extends through rotating plate, and extends through different adjustment holes and is set in quick joint with joint pipe, realizes the quick fixing of joint rod, improves the convenience and reliability of operation, and the inner wall of pressure block is equipped with compression spring, ensures the stable clamping force of pressure block, improves the reliability of operation. ACCURACY

[0021] Figure 1 It is the overall structural schematic view of device in unused state in the utility model;

[0022] Figure 2It is the overall structural schematic view of the device under the bottom visual angle in the utility model.

[0023] Figure 3 It is the structural schematic view of the positioning terminal installation mode in the utility model.

[0024] Figure 4 It is the structural schematic view of the installation adjustment mechanism and the clamping fixing mechanism in the utility model.

[0025] Figure 5 It is the structural schematic view inside the installation adjustment mechanism and the clamping fixing mechanism in the utility model.

[0026] In the drawing: 1, bottom plate; 2, vertical plate; 3, rotating plate; 4, rotating shaft assembly; 5, hydraulic cylinder; 6, navigation assembly; 7, adjustment plate; 8, clamping rod; 9, clamping pipe; 10, lock frame; 11, clamping groove; 12, vertical moving ring; 13, connecting groove; 14, push ring; 15, pressing block; 16, pressing rod; 17, pressing groove; 18, tightening spring; 19, support frame; 20, adjustment hole; 21, connecting plate; 22, compression spring; 23, mounting plate. DETAILED DESCRIPTION

[0027] It should be noted that the embodiments and features in the embodiments in the present application can be combined with each other without conflict.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as generally understood by those skilled in the art to which the present application belongs.

[0029] In the present application, unless otherwise specified, the directions such as "up, down" are generally with respect to the directions shown in the drawings, or with respect to the vertical, perpendicular or gravity directions; similarly, for the convenience of understanding and description, "left, right" are generally with respect to the left and right shown in the drawings; "inner, outer" refer to the inner and outer with respect to the contour of each component itself, but the above direction words are not used to limit the present application.

[0030] Please refer to Figures 1-5The application discloses a mounting structure for a GNSS positioning terminal, which comprises a bottom plate 1, a rotating adjusting mechanism, a mounting adjusting mechanism and a clamping fixing mechanism, wherein the rotating adjusting mechanism comprises a vertical plate 2, a rotating plate 3, a rotating shaft assembly 4 and a hydraulic cylinder 5, the vertical plate 2 is installed at one end of the rotating plate 3, one end of the hydraulic cylinder 5 is rotationally connected with the vertical plate 2, the other end of the hydraulic cylinder 5 is rotationally connected with one end of the rotating plate 3, and one end of the vertical plate 2 is rotationally connected with one end of the bottom plate 1 through the rotating shaft assembly 4, the mounting adjusting mechanism comprises a navigation assembly 6, an adjusting plate 7, a clamping rod 8, a clamping pipe 9, a lock frame 10, a clamping groove 11, a vertical moving ring 12 and a connecting groove 13, the navigation assembly 6 is installed at two ends of the adjusting plate 7, the clamping rod 8 is installed on the adjusting plate 7, the clamping rod 8 can be inserted into the clamping pipe 9, the clamping groove 11 is arranged on the side wall of the clamping rod 8, the lock frame 10 is transversely and slidingly arranged on the side wall of the clamping pipe 9, the vertical moving ring 12 is longitudinally and slidingly arranged on the outer wall of the clamping pipe 9, the connecting groove 13 is arranged in the vertical moving ring 12, one end of the lock frame 10 is slidingly connected with the connecting groove 13, and the vertical moving ring 12 moves longitudinally, and the lock frame 10 moves relatively in the connecting groove 13, so that the lock frame 10 is inserted into or away from the clamping groove 11.

[0031] In the embodiment, the vertical plate 2 is perpendicular to the bottom plate 1, and the whole device is static in a default position; when it is needed to adjust the angle of the equipment, the hydraulic cylinder 5 is driven to stretch or contract to drive the vertical plate 2 to rotate relative to the bottom plate 1, when the hydraulic cylinder 5 is stretched, the vertical plate 2 rotates around the rotating shaft assembly 4 to drive the rotating plate 3 to adjust the angle, when the hydraulic cylinder 5 is contracted, the vertical plate 2 returns to the original position or is further adjusted to a specified angle, through the locking function of the hydraulic cylinder 5 and the stable support of the rotating shaft assembly 4, the vertical plate 2 and the rotating plate 3 can be fixed at a required angle, the angle adjustment of the positioning terminal is realized, different installation requirements or environmental changes can be adapted, the clamping rod 8 is inserted into the clamping pipe 9, the vertical moving ring 12 is in an unlocked position, the lock frame 10 is not inserted into the clamping groove 11, the vertical moving ring 12 slides upwards to drive the connecting groove 13 to move, so that the lock frame 10 is forced to slide transversely and is inserted into the clamping groove 11 on the side wall of the clamping rod 8, the stable connection of the clamping rod 8 and the clamping pipe 9 is realized, the vertical moving ring 12 reversely slides, the connecting groove 13 drives the lock frame 10 to exit the clamping groove 11, the connection of the clamping rod 8 and the clamping pipe 9 is released, the clamping pipe 9 is connected with the rotating plate 3 through the adjusting holes 20, and the selection of different adjusting holes 20 allows the equipment to realize the height or position fine adjustment in the longitudinal direction.

[0032] The clamping fixing mechanism comprises a pushing ring 14, a pressing block 15, a pressing rod 16, a pressing groove 17 and a tightening spring 18, the pushing ring 14 is slidingly arranged on the outer wall of the clamping pipe 9, the pressing block 15 is connected at the bottom of the pushing ring 14 and is slidingly connected with the bottom end of the pushing ring 14, the pressing rod 16 is installed at the bottom of the pressing block 15, the tightening spring 18 is installed between adjacent pressing blocks 15, the pressing groove 17 is arranged on the outer wall of the vertical moving ring 12, and the pressing rod 16 can press the pressing groove 17, so that the vertical moving ring 12 is fixed on the outer wall of the clamping pipe 9.

[0033] In the embodiment, the push ring 14 is not sliding, the pressing block 15 is in a relaxed state, the pressing rod 16 is not inserted into the pressing groove 17, the longitudinal moving ring 12 can slide freely, the push ring 14 is pushed to slide along the outer wall of the clamping pipe 9, the push ring 14 drives the pressing block 15 to slide centripetally, the pressing rod 16 is inserted into the pressing groove 17 on the outer wall of the longitudinal moving ring 12, the longitudinal moving ring 12 is fixed on the outer wall of the clamping pipe 9, and the tightening spring 18 provides elastic force to ensure that the pressing block 15 is stably pressed. The loosening process is as follows: the push ring 14 is pushed reversely, the pressing rod 16 is withdrawn from the pressing groove 17, and the longitudinal moving ring 12 is released from the fixed state and can slide freely.

[0034] Please refer to Figures 1-5 , as a supplementary embodiment of the rotating adjusting mechanism, the installation adjusting mechanism and the clamping fixing mechanism for the installation structure of the GNSS positioning terminal: the support frame 19 is arranged at the top of the side end of the bottom plate 1, and the rotating shaft assembly 4 is arranged at one end of the support frame 19; the adjusting holes 20 are arranged on the rotating plate 3, and a plurality of groups of the adjusting holes 20 are arranged in parallel; the connecting plate 21 is arranged at the bottom end of the side wall of the clamping pipe 9, and the connecting plate 21 is fixedly arranged at the bottom end of the rotating plate 3; each group of the clamping pipes 9 is in communication with the adjusting holes 20; one end of the clamping rod 8 extends through the rotating plate 3 and is in quick clamping communication with the clamping pipe 9 through different adjusting holes 20; the compression spring 22 is arranged on the inner wall of the pressing block 15, and the other end of the compression spring 22 is in communication with the outer wall of the clamping pipe 9; the mounting plate 23 is arranged at the side end and the top end of the bottom plate 1, and the device is fixed at a required position by penetrating the mounting plate 23 with external bolts.

[0035] More specifically, the hydraulic cylinder 5 drives the longitudinal plate 2 to rotate, adjusts the angle of the rotating plate 3, and adjusts the orientation of the positioning terminal; the plurality of groups of the adjusting holes 20 on the rotating plate 3 can further adjust the position and angle of the equipment by connecting the clamping pipes 9; the clamping rod 8 extends into the clamping pipe 9 through the adjusting plate 7; the longitudinal moving ring 12 slides to drive the lock frame 10 to be inserted into the clamping groove 11 on the side wall of the clamping rod 8, so as to realize quick connection; the cooperation of the longitudinal moving ring and the clamping rod 8 realizes accurate installation and position adjustment of the equipment; the push ring 14 slides to drive the pressing block 15 to move centripetally; the pressing rod 16 is inserted into the pressing groove 17 to fix the longitudinal moving ring 12 on the outer wall of the clamping pipe 9, so as to ensure stable connection of the equipment; the tightening spring 18 provides continuous pressure to further improve the fixing reliability; the push ring 14 slides reversely, the pressing rod 16 is withdrawn from the pressing groove 17, the longitudinal moving ring 12 is loosened, the lock frame 10 is released from the locking of the clamping rod 8, and the equipment can be quickly disassembled; the hydraulic cylinder 5 is retracted, the longitudinal plate 2 returns to the initial position, and the device is completed.

[0036] In summary, the overall device is in use or operation: when the operation of the adjustment mechanism is needed, the vertical plate 2 is perpendicular to the bottom plate 1, and the entire device is stationary in the default position, when the angle of the device needs to be adjusted, the hydraulic cylinder 5 extends and retracts to drive the vertical plate 2 to rotate relative to the bottom plate 1, when the hydraulic cylinder 5 extends, the vertical plate 2 rotates around the rotating shaft assembly 4, driving the rotating plate 3 to adjust the angle, when the hydraulic cylinder 5 retracts, the vertical plate 2 returns to the original position or further adjusts to the specified angle, through the locking function of the hydraulic cylinder 5 and the stable support of the rotating shaft assembly 4, the vertical plate 2 and the rotating plate 3 can be fixed at the required angle, realizing the angle adjustment of the positioning terminal, adapting to different installation requirements or environmental changes.

[0037] When the operation of the adjustment mechanism is needed, the clamping rod 8 is inserted into the clamping pipe 9, the vertical moving ring 12 is in the unlocked position, the lock frame 10 is not inserted into the clamping slot 11, the vertical moving ring 12 slides upward, driving the connecting slot 13 to move, forcing the lock frame 10 to slide horizontally and insert into the clamping slot 11 of the side wall of the clamping rod 8, realizing the stable connection of the clamping rod 8 and the clamping pipe 9, the vertical moving ring 12 reverses the sliding, the connecting slot 13 drives the lock frame 10 to exit the clamping slot 11, releasing the connection of the clamping rod 8 and the clamping pipe 9, the clamping pipe 9 is connected with the rotating plate 3 through the adjusting hole 20, and the selection of different adjusting holes 20 allows the device to realize the height or position fine adjustment in the longitudinal direction.

[0038] When the operation of the clamping and fixing mechanism is needed, the push ring 14 does not slide, the pressing block 15 is in a relaxed state, the pressing rod 16 does not enter the pressing slot 17, and the vertical moving ring 12 can slide freely, the push ring 14 is pushed to slide along the outer wall of the clamping pipe 9, the push ring 14 drives the pressing block 15 to slide inward, the pressing rod 16 is inserted into the pressing slot 17 on the outer wall of the vertical moving ring 12, fixing the vertical moving ring 12 on the outer wall of the clamping pipe 9, and the tightening spring 18 provides elastic force to ensure that the pressing block 15 is stably pressed, the loosening process: the push ring 14 is pushed in reverse, the pressing rod 16 exits from the pressing slot 17, and the vertical moving ring 12 is in a free sliding state.

[0039] The hydraulic cylinder 5 drives the vertical plate 2 to rotate, adjusts the angle of the rotating plate 3, and thus adjusts the orientation of the positioning terminal, a plurality of adjusting holes 20 on the rotating plate 3 can further adjust the position and angle of the device by connecting the clamping pipe 9, the clamping rod 8 is inserted into the clamping pipe 9 through the adjusting plate 7, the vertical moving ring 12 slides to drive the lock frame 10 to insert into the clamping slot 11 of the side wall of the clamping rod 8, realizing quick connection, the cooperation of the vertical ring and the clamping rod 8 realizes accurate installation and position adjustment of the device, the push ring 14 slides to drive the pressing block 15 to move inward, the pressing rod 16 is inserted into the pressing slot 17, fixing the vertical moving ring 12 on the outer wall of the clamping pipe 9, ensuring stable connection of the device, the tightening spring 18 provides continuous pressure, further improving the fixing reliability, the push ring 14 reverses the sliding, the pressing rod 16 exits from the pressing slot 17, the vertical moving ring 12 is loosened, the lock frame 10 releases the locking of the clamping rod 8, and the device can be quickly disassembled, the hydraulic cylinder 5 retracts, the vertical plate 2 returns to the initial position, and the device completes the disassembly and adjustment.

[0040] In all the above-mentioned solutions, the connection between the two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection or other known connection mode, which will not be described one by one here. In the above, whenever it is mentioned that it is fixedly connected, it is preferred to consider welding. Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A mounting structure for a GNSS positioning terminal, comprising a base plate (1), a rotation adjustment mechanism, a mounting adjustment mechanism, and a clamping and fixing mechanism, characterized in that: The rotating adjusting mechanism comprises a longitudinal plate (2), a rotating plate (3), a rotating shaft assembly (4) and a hydraulic cylinder (5), the longitudinal plate (2) is installed at one end of the rotating plate (3), one end of the hydraulic cylinder (5) is rotationally connected with the longitudinal plate (2), the other end of the hydraulic cylinder (5) is rotationally connected with one end of the rotating plate (3), and one end of the longitudinal plate (2) is rotationally connected with one end of the bottom plate (1) through the rotating shaft assembly (4).

2. The mounting structure for a GNSS positioning terminal according to claim 1, characterized in that: The installation adjusting mechanism comprises a navigation assembly (6), an adjusting plate (7), a clamping rod (8), a clamping pipe (9), a lock frame (10), a clamping groove (11), a longitudinal moving ring (12) and a connecting groove (13), the adjusting plate (7) is installed at two ends of the navigation assembly (6), the clamping rod (8) is installed on the adjusting plate (7), the clamping rod (8) can extend into the inside of the clamping pipe (9), the clamping groove (11) is arranged on the side wall of the clamping rod (8), the lock frame (10) is transversely and slidingly arranged on the side wall of the clamping pipe (9), the longitudinal moving ring (12) is longitudinally and slidingly arranged on the outer wall of the clamping pipe (9), the connecting groove (13) is arranged in the inside of the longitudinal moving ring (12), and one end of the lock frame (10) is slidingly connected with the connecting groove (13).

3. The mounting structure for a GNSS positioning terminal according to claim 1, characterized in that: The clamping fixing mechanism comprises a pushing ring (14), a pressing block (15), a pressing rod (16), a pressing groove (17) and a tightening spring (18), the pushing ring (14) is slidingly arranged on the outer wall of the clamping pipe (9), the pressing block (15) is connected at the bottom of the pushing ring (14), the pressing block (15) is slidingly connected at the bottom end of the pushing ring (14), the pressing rod (16) is installed at the bottom of the pressing block (15), the tightening spring (18) is installed between adjacent pressing blocks (15), the pressing groove (17) is arranged on the outer wall of the longitudinal moving ring (12), and the pressing rod (16) can press the pressing groove (17) so that the longitudinal moving ring (12) is fixed on the outer wall of the clamping pipe (9).

4. The mounting structure for a GNSS positioning terminal according to claim 1, characterized in that: The side end top of the bottom plate (1) is provided with a supporting frame (19), and the rotating shaft assembly (4) is installed at one end of the supporting frame (19).

5. The mounting structure for a GNSS positioning terminal according to claim 4, characterized by: The rotating plate (3) is provided with adjusting holes (20), and a plurality of groups of adjusting holes (20) are arranged in parallel.

6. The mounting structure for a GNSS positioning terminal according to claim 4, characterized by: The side wall bottom end of the clamping pipe (9) is provided with a connecting plate (21), and the connecting plate (21) is fixedly installed at the bottom end of the rotating plate (3).

7. The mounting structure for a GNSS positioning terminal according to claim 2, characterized by: One end of the clamping rod (8) extends through the rotating plate (3) and different adjusting holes (20) and is quickly clamped with the clamping pipe (9).

8. The mounting structure for a GNSS positioning terminal according to Claim 1, characterized by: The inner wall of the pressing block (15) is provided with a compression spring (22), and the other end of the compression spring (22) is connected with the outer wall of the clamping pipe (9). The side end and the top end of the bottom plate (1) are provided with mounting plates (23), and the device is fixed at a required position by penetrating the mounting plates (23) with external bolts.

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