A portable laser obstacle clearing instrument

Abstract

The application provides a portable laser obstacle clearing instrument, relates to the technical field of obstacle clearing, and comprises a shell, a laser emitter is arranged on one side of the shell, and a laser sensor is arranged on one side of the shell. The laser sensor upper end can be shielded by using the shielding adjusting device, the interference of the reflection of strong light or sunlight on the use of the laser sensor is avoided, the measurement accuracy of the laser sensor is prevented from being influenced, and therefore the use effect of the laser obstacle clearing instrument can be improved. The blocking assembly can limit the clamping block of the shielding adjusting device, so that the use effect of the clamping block is improved, and the use effect of the shielding adjusting device is improved. The shielding and protection of the laser emitter and the laser sensor when not being used can be realized by using the protection device, the forced collision of the laser emitter and the laser sensor is avoided, and the situation that the use effect of the laser emitter and the laser sensor is influenced is prevented.

Description

Technical Field

[0001] This invention relates to the field of obstacle removal, and in particular to a portable laser obstacle removal device. Background Technology

[0002] Laser obstacle removal devices use high-energy laser beams to remove obstacles in various areas by utilizing the thermal effect of the laser, including removing non-metallic foreign objects in scenarios such as power transmission lines and railways.

[0003] When using a laser obstacle clearing device, the housing is connected to a power source via a cable, and the housing is placed on a stand. The laser emitter on one side of the housing is then adjusted to a designated angle. Once the obstacle is located by the laser sensor, the laser emitter emits a laser beam to clear and remove the obstacle from the designated area. Strong ambient light or reflected sunlight can interfere with the laser sensor, affecting measurement accuracy and thus impacting the effectiveness of the laser obstacle clearing device. Summary of the Invention

[0004] The technical problem to be solved by this invention is that strong light or sunlight reflection in the external environment can interfere with the laser sensor, affecting the measurement accuracy and thus affecting the effectiveness of the laser obstacle clearing device.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a portable laser obstacle clearing device, including a housing, a laser emitter and a laser sensor on one side of the housing, a bracket on one side of the housing, a cable on one side of the housing, a power supply on the side of the cable away from the housing, and a shielding adjustment device on one side of the housing, wherein the shielding cover of the shielding adjustment device is used to shield the upper end of the laser emitter.

[0006] The effect achieved by the above components is as follows: When using the laser obstacle clearer, the housing is connected to the power supply via a cable, and the housing is placed on the bracket. Then, the shielding adjustment device is used to adjust the position of the shield to shield the upper part of the laser sensor. Then, the laser emitter on one side of the housing is adjusted to a specified angle. After the obstacle is located by the laser sensor, the laser emitter emits a laser to clear and remove the obstacle in the specified area.

[0007] Preferably, the shielding adjustment device includes a placement block, an adjustment plate, a shielding cover, a locking block, a reset component, and a control component. The placement block is disposed at the upper end of the housing. The adjustment plate slides inside the placement block. The shielding cover is disposed on one side of the adjustment plate and is located above the laser sensor. A plurality of adjustment slots are provided on one side of the adjustment plate. The locking block is inserted into the placement block and reaches into the adjustment slots on one side of the adjustment plate to fix the adjustment plate. The reset component is disposed on one side of the locking block to reset the locking block. The control component is located at the upper end of the shielding cover to control the movement of the shielding frame.

[0008] The aforementioned components achieve the following effects: When using the shielding adjustment device, the locking block can be moved to disengage from the adjustment slot on one side of the adjustment plate. Then, the shielding cover is moved via the control component. The adjustment plate fixed on one side of the shielding cover slides inside the placement block fixed on one side of the housing, allowing the shielding cover to reach the upper end of the laser sensor and block the strong light or reflected sunlight from the upper end of the laser emitter. Then, the reset component drives the locking block to reset, allowing the locking block to pass through the placement block and reach the adjustment slot on one side of the adjustment plate, thus fixing the adjustment plate and the shielding cover. By using the shielding adjustment device, the upper end of the laser sensor can be shielded, preventing strong light or sunlight reflection from interfering with the use of the laser sensor and avoiding affecting the measurement accuracy of the laser sensor, thereby improving the effectiveness of the laser obstacle clearing device.

[0009] Preferably, the adjusting plate is provided with a reinforcing plate on the side near the shield, and the reinforcing plate improves the connection strength between the adjusting plate and the reinforcing plate.

[0010] The effect achieved by the above components is to improve the connection strength between the adjusting plate and the shield by fixing the reinforcing plate at the connection point of the adjusting plate and the shield, and to prevent the shield from deforming under stress at the connection point of the adjusting plate.

[0011] Preferably, the reset assembly includes a fixed plate, a spring, and a telescopic rod. The fixed plate is disposed on one side of the placement block. The two ends of the spring are respectively connected to the fixed plate and the locking block. The telescopic rod is located inside the spring and its two ends are respectively connected to the fixed plate and the locking block.

[0012] The effect achieved by the above components is as follows: when the locking block disengages from the adjustment slot on one side of the adjustment plate, the spring fixed to the locking block and the fixing plate will be compressed, and the telescopic rod inside the spring will be shortened. The two ends of the telescopic rod are fixed to the fixing plate and the locking block to restrict the shape of the spring. Then, when the locking block is used later without restricting the locking block, the spring will quickly reset the locking block, and then the locking block will quickly fix the position of the adjustment plate.

[0013] Preferably, the upper end of the shield is provided with a control component, the control component includes a control block, and a plurality of anti-slip blocks are provided on one side of the control block.

[0014] The effect achieved by the above components is as follows: by setting a control block on one side of the shield and fixing several anti-slip blocks on both sides of the control block, the friction between the operator and the shield is increased, making it easier for the operator to adjust and move the shield.

[0015] Preferably, a blocking component is provided on one side of the fixing plate. The blocking component includes a first through hole opened on the surface of the fixing plate, a blocking plate inserted inside the first through hole on one side of the fixing plate, a magnet on one side of the fixing plate, and an iron sheet on one side of the blocking plate.

[0016] The effects achieved by the above components are as follows: When the locking block fixes the adjusting plate, the blocking plate moves inside the first through hole on one side of the fixing plate, so that the blocking plate is between the locking block and the fixing plate, thereby blocking and limiting the locking block, preventing the locking block from moving upward. When the locking block is not fixed to the adjusting plate, the blocking plate is between the locking block and the placement block, preventing the locking block from moving downward, so that the reset component cannot reset with the locking block. When the blocking plate is used, the magnet on one side of the fixing plate attracts the iron sheet on one side of the blocking plate, making it difficult for the blocking plate to move under force. Through the blocking component, the locking block of the blocking adjustment device can be limited, thereby improving the use effect of the locking block and thus improving the use effect of the blocking adjustment device.

[0017] Preferably, a protective device is provided on one side of the control block. The protective device includes a bolt, a mounting plate, a protective plate, an operating block, and a second through hole. The bolt is inserted into the control block to fix the mounting plate on one side of the control block. The protective plate is located on one side of the mounting plate and is inserted into the shield on the side away from the adjustment plate. The operating block is installed on the side of the bolt away from the control block. The second through hole is provided on the side of the protective plate near the mounting plate.

[0018] The aforementioned components achieve the following effect: When storing the laser obstacle clearing device, the protective plate can be inserted into one side of the shield through the second through hole on one side of the protective plate. At this time, the mounting plate fixed on one side of the protective plate contacts the control block. Then, the operating block is fixed by bolts on one side, so that the bolts are rotated into the control block to thread the mounting plate, thus completing the fixation of the protective plate position. This allows the protective plate to shield and protect the laser emitter and laser sensor on one side of the housing. By using the protective device, the laser emitter and laser sensor can be shielded and protected when not in use, preventing the laser emitter and laser sensor from being subjected to force and collision, which could affect the performance of the laser emitter and laser sensor.

[0019] Preferably, a trapezoidal block is provided on the side of the protective plate away from the mounting plate, and the trapezoidal block reduces the size of one side of the protective plate.

[0020] The effect achieved by the above components is that by fixing the trapezoidal block on the side of the protective plate away from the mounting plate, the protective plate can be more easily inserted into the shield, thereby facilitating the subsequent use of bolts to fix the protective plate.

[0021] In summary, the beneficial effects of the present invention are as follows:

[0022] By using a shielding adjustment device, the upper part of the laser sensor can be shielded to prevent strong light or sunlight reflection from interfering with the use of the laser sensor and affecting its measurement accuracy, thereby improving the effectiveness of the laser obstacle clearing device.

[0023] By using the blocking component, the locking block of the occlusion adjustment device can be limited to improve the effectiveness of the locking block, thereby improving the effectiveness of the occlusion adjustment device.

[0024] By using protective devices, the laser emitter and laser sensor can be shielded and protected when not in use, preventing them from being subjected to impacts that could affect their performance. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 A three-dimensional structural diagram of a portable laser obstacle removal device is provided for this invention;

[0027] Figure 2 This invention provides a three-dimensional structural diagram of an obstruction adjustment device in a portable laser obstacle removal device;

[0028] Figure 3 This invention proposes a portable laser obstacle removal device. Figure 2 A rear-view stereoscopic structural diagram;

[0029] Figure 4 This invention provides a three-dimensional structural diagram of the placement block in a portable laser obstacle removal device;

[0030] Figure 5 This invention proposes a portable laser obstacle removal device. Figure 4 A schematic diagram of a partial three-dimensional structure;

[0031] Figure 6 This invention proposes a portable laser obstacle removal device. Figure 5 Enlarged view of point A;

[0032] Figure 7 This invention presents a three-dimensional structural diagram of a protective device in a portable laser obstacle removal device.

[0033] Legend: 1. Housing; 2. Laser emitter; 3. Laser sensor; 4. Bracket; 5. Cable; 6. Power supply; 7. Shielding adjustment device; 71. Placement block; 72. Adjustment plate; 73. Shielding cover; 74. Adjustment groove; 75. Locking block; 76. Reinforcing plate; 77. Reset assembly; 771. Fixing plate; 772. Spring; 773. Telescopic rod; 78. Control assembly; 781. Control block; 782. Anti-slip block; 8. Blocking assembly; 81. First through hole; 82. Blocking plate; 83. Magnet; 84. Iron sheet; 9. Protective device; 91. Bolt; 92. Mounting plate; 93. Protective plate; 94. Operating block; 95. Second through hole; 96. Trapezoidal block. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] Figures 1 to 7 The portable laser obstacle clearing device shown includes a housing 1, a laser emitter 2 and a laser sensor 3 (model LTF 400) on one side of the housing 1, a bracket 4 on one side of the housing 1, a cable 5 on one side of the housing 1, a power supply 6 on the side of the cable 5 away from the housing 1, and a shielding adjustment device 7 on one side of the housing 1. The shielding device 7 has a shielding cover 73 to shield the upper part of the laser emitter 2. When using the laser obstacle clearing device, the housing 1 is connected to the power supply 6 via the cable 5, and the housing 1 is placed on the bracket 4. Then, the shielding adjustment device 7 is adjusted to position the shielding cover 73 to shield the upper part of the laser sensor 3. The laser emitter 2 on one side of the housing 1 is then adjusted to a specified angle, and after the laser sensor 3 locates the obstacle, the laser emitter 2 emits a laser to clear and remove the obstacle in the designated area.

[0037] Figures 1 to 7The shielding adjustment device 7 shown includes a placement block 71, an adjustment plate 72, a shielding cover 73, a locking block 75, a reset component 77, and a control component 78. The placement block 71 is located at the upper end of the housing 1. The adjustment plate 72 slides inside the placement block 71. The shielding cover 73 is located on one side of the adjustment plate 72 and is above the laser sensor 3. Several adjustment slots 74 are opened on one side of the adjustment plate 72. The locking block 75 is inserted into the placement block 71 and reaches into the adjustment slots 74 on one side of the adjustment plate 72 to fix the adjustment plate 72. The reset component 77 is located on one side of the locking block 75 to reset the locking block 75. The control component 78 is located at the upper end of the shielding cover 73 to control the movement of the shielding frame. When using the shading adjustment device 7, the locking block 75 can be moved to disengage from the adjustment groove 74 on one side of the adjustment plate 72. Then, the shading cover 73 can be moved by the control component 78. The adjustment plate 72, which is fixed on one side of the shading cover 73, will slide inside the placement block 71 fixed on one side of the housing 1, so that the shading cover 73 reaches the upper end of the laser sensor 3 to block the strong light or reflected sunlight from the upper end of the laser emitter 2. Then, the reset component 77 drives the locking block 75 to reset, so that the locking block 75 passes through the placement block 71 and reaches the adjustment groove 74 on one side of the adjustment plate 72 to fix the adjustment plate 72 and the shading cover 73. By using the shading adjustment device 7, the upper end of the laser sensor 3 can be blocked to avoid interference from the reflection of strong light or sunlight on the use of the laser sensor 3, and to avoid affecting the measurement accuracy of the laser sensor 3, thereby improving the use effect of the laser obstacle clearing device.

[0038] Figures 1 to 7 The adjusting plate 72 shown has a reinforcing plate 76 on the side near the shield 73. The reinforcing plate 76 increases the connection strength between the adjusting plate 72 and the reinforcing plate 76. By fixing the reinforcing plate 76 at the connection between the adjusting plate 72 and the shield 73, the connection strength between the adjusting plate 72 and the shield 73 is increased, and deformation of the connection between the shield 73 and the adjusting plate 72 under stress is prevented.

[0039] Figures 1 to 7The reset assembly 77 shown includes a fixed plate 771, a spring 772, and a telescopic rod 773. The fixed plate 771 is disposed on one side of the placement block 71. The two ends of the spring 772 are connected to the fixed plate 771 and the locking block 75, respectively. The telescopic rod 773 is located inside the spring 772 and is connected to the fixed plate 771 and the locking block 75, respectively. When the locking block 75 disengages from the adjustment slot 74 on one side of the adjustment plate 72, the spring 772, which is fixed to the locking block 75 and the fixed plate 771, will be compressed, and the telescopic rod 773 inside the spring 772 will shorten. The two ends of the telescopic rod 773 are fixed to the fixed plate 771 and the locking block 75 to restrict the shape of the spring 772. Then, when the locking block 75 is used subsequently without restricting it, the spring 772 quickly resets the locking block 75, thereby quickly fixing the position of the adjustment plate 72.

[0040] Figures 1 to 7 The shield 73 shown has a control component 78 at its upper end. The control component 78 includes a control block 781, and a plurality of anti-slip blocks 782 are provided on one side of the control block 781. By setting the control block 781 on one side of the shield 73 and fixing a plurality of anti-slip blocks 782 on both sides of the control block 781, the friction between the operator and the shield 73 is increased, making it easier for the operator to adjust and move the shield 73.

[0041] Figures 1 to 7 The fixed plate 771 shown has a blocking component 8 on one side. The blocking component 8 includes a first through hole 81 opened on the surface of the fixed plate 771. A blocking plate 82 is inserted into the first through hole 81 on one side of the fixed plate 771. A magnet 83 is provided on one side of the fixed plate 771. An iron sheet 84 is provided on one side of the blocking plate 82. When the locking block 75 fixes the adjusting plate 72, the blocking plate 82 moves inside the first through hole 81 on one side of the fixing plate 771, so that the blocking plate 82 is between the locking block 75 and the fixing plate 771, thereby blocking and limiting the locking block 75, preventing the locking block 75 from moving upward. When the locking block 75 is not fixed to the adjusting plate 72, the blocking plate 82 is between the locking block 75 and the placement block 71, preventing the locking block 75 from moving downward, so that the reset component 77 cannot reset with the locking block 75. When the blocking plate 82 is used, the magnet 83 on one side of the fixing plate 771 attracts the iron piece 84 on one side of the blocking plate 82, making it difficult for the blocking plate 82 to move under force. Through the blocking component 8, the locking block 75 of the blocking adjustment device 7 can be limited, thereby improving the use effect of the locking block 75 and thus improving the use effect of the blocking adjustment device 7.

[0042] Figures 1 to 7The control block 781 shown is provided with a protective device 9 on one side. The protective device 9 includes a bolt 91, a mounting plate 92, a protective plate 93, an operating block 94, and a second through hole 95. The bolt 91 is inserted into the control block 781 to fix the mounting plate 92 on one side of the control block 781. The protective plate 93 is located on one side of the mounting plate 92 and is inserted into the shield 73 on the side away from the adjusting plate 72. The operating block 94 is installed on the side of the bolt 91 away from the control block 781. The protective plate 93 has a second through hole 95 on the side close to the mounting plate 92. When storing the laser obstacle clearing device, the protective plate 93 can be inserted into one side of the shield 73 through the second through hole 95 on one side of the protective plate 93. At this time, the mounting plate 92 fixed on one side of the protective plate 93 contacts the control block 781. Then, the operating block 94 is fixed on one side of the bolt 91, so that the bolt 91 is rotated into the control block 781 to fix the mounting plate 92 with threads. Then the position of the protective plate 93 is fixed, so that the protective plate 93 shields and protects the laser emitter 2 and laser sensor 3 on one side of the housing 1. By using the protective device 9, the laser emitter 2 and laser sensor 3 can be shielded and protected when not in use, so as to avoid the laser emitter 2 and laser sensor 3 being subjected to force and collision, which would affect the use effect of the laser emitter 2 and laser sensor 3.

[0043] Figures 1 to 7 The protective plate 93 shown has a trapezoidal block 96 on the side away from the mounting plate 92, which reduces the size of one side of the protective plate 93. By fixing the trapezoidal block 96 to the side of the protective plate 93 away from the mounting plate 92, the protective plate 93 can be more easily inserted into the shield 73, thereby facilitating the subsequent use of bolts 91 to fix the protective plate 93.

[0044] Working principle: When using the laser obstacle clearer, the housing 1 is connected to the power supply 6 via cable 5, and the housing 1 is placed on the bracket 4. Then, the position of the shield 73 is adjusted by the shielding adjustment device 7 to shield the upper part of the laser sensor 3. Then, the laser emitter 2 on one side of the housing 1 is adjusted to a specified angle. After the obstacle is located by the laser sensor 3, the laser emitter 2 emits a laser to clear and remove the obstacle in the specified area. When using the shielding adjustment device 7, the locking block 75 can be moved to disengage from the adjustment slot 74 on one side of the adjustment plate 72. When the locking block 75 disengages from the adjustment slot 74 on one side of the adjustment plate 72, the spring 772 fixed to the locking block 75 and the fixing plate 771 will be compressed, and the telescopic rod 773 inside the spring 772 will shorten. The two ends of the telescopic rod 773 are fixed to the fixing plate 771 and the locking block 75 to restrict the shape of the spring 772. Then, the blocking plate 82 is moved so that the blocking plate 82 is between the locking block 75 and the placement block 71, preventing the locking block 75 from moving downward. Then, the shielding cover 73 is moved by the control component 78. Then, the adjustment plate 72 fixed on one side of the shielding cover 73 will slide inside the placement block 71 fixed on one side of the housing 1, so that the shielding cover 73 reaches the upper end of the laser sensor 3 to block the strong light from the upper end of the laser emitter 2. Alternatively, the reflected sunlight can be blocked, and then the blocking plate 82 can be moved away from the locking block. Then, the reset component 77 drives the locking block 75 to reset, so that the locking block 75 passes through the placement block 71 and reaches the adjustment groove 74 on one side of the adjustment plate 72 to fix the adjustment plate 72 and the blocking cover 73. When the locking block 75 fixes the adjustment plate 72, the blocking plate 82 moves inside the first through hole 81 on one side of the fixing plate 771, so that the blocking plate 82 is between the locking block 75 and the fixing plate 771 to block and limit the locking block 75, so that the locking block 75 cannot move upward. By using the blocking adjustment device 7, the upper end of the laser sensor 3 can be blocked to avoid strong light or sunlight reflection from interfering with the use of the laser sensor 3, and to avoid affecting the measurement accuracy of the laser sensor 3, thereby improving the use effect of the laser obstacle clearing device.

[0045] When storing the laser obstacle clearing device, the protective plate 93 can be inserted into one side of the shield 73 through the second through hole 95 on one side of the protective plate 93. At this time, the mounting plate 92 fixed on one side of the protective plate 93 contacts the control block 781. Then, the operating block 94 is fixed on one side of the bolt 91, so that the bolt 91 is rotated into the control block 781 to fix the mounting plate 92 with threads. Then the position of the protective plate 93 is fixed, so that the protective plate 93 shields and protects the laser emitter 2 and laser sensor 3 on one side of the housing 1. By using the protective device 9, the laser emitter 2 and laser sensor 3 can be shielded and protected when not in use, so as to avoid the laser emitter 2 and laser sensor 3 being subjected to force and collision, which would affect the use effect of the laser emitter 2 and laser sensor 3.

[0046] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments applicable to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, still fall within the protection scope of the present invention. In the description of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood through specific circumstances.

Claims

1. A portable laser obstacle clearing device, comprising a housing (1), characterized in that: A laser emitter (2) is provided on one side of the housing (1), a laser sensor (3) is provided on one side of the housing (1), a bracket (4) is provided on one side of the housing (1), a cable (5) is provided on one side of the housing (1), a power supply (6) is provided on the side of the cable (5) away from the housing (1), a shielding adjustment device (7) is provided on one side of the housing (1), and a shielding cover (73) of the shielding adjustment device (7) is used to shield the upper end of the laser emitter (2). The shielding adjustment device (7) includes a placement block (71), an adjustment plate (72), a shielding cover (73), a locking block (75), a reset component (77), and a control component (78). The placement block (71) is located at the upper end of the housing (1), the adjustment plate (72) slides inside the placement block (71), and the shielding cover (73) is located on one side of the adjustment plate (72) and above the laser sensor (3). A plurality of adjustment slots (74) are provided on one side. The locking block (75) is inserted into the placement block (71) and reaches into the adjustment slot (74) on one side of the adjustment plate (72) to fix the adjustment plate (72). The reset component (77) is provided on one side of the locking block (75) to reset the locking block (75). The control component (78) is located at the upper end of the shield (73) to control the movement of the shield frame. The adjustment plate (72) is provided with a reinforcing plate (76) on the side near the shield (73). The reinforcing plate (76) improves the connection strength between the adjustment plate (72) and the reinforcing plate (76). The reset component (77) includes a fixing plate (771), a spring (772) and a telescopic rod (773). The fixing plate (771) is provided on one side of the placement block (71). The spring (772) The telescopic rod (773) is located inside the spring (772) and is connected to the fixed plate (771) and the locking block (75) at both ends respectively. The upper end of the shield (73) is provided with a control component (78). The control component (78) includes a control block (781). A plurality of anti-slip blocks (782) are provided on one side of the control block (781). A blocking component (8) is provided on one side of the fixed plate (771). The blocking component (8) includes a first through hole (81) opened on the surface of the fixed plate (771). A blocking plate (82) is inserted into the first through hole (81) on one side of the fixed plate (771). The blocking component (8) includes a first through hole (81) opened on the surface of the fixed plate (771). A blocking plate (82) is inserted into the first through hole (81) on one side of the fixed plate (771). A magnet (83) is provided. An iron sheet (84) is provided on one side of the blocking plate (82). A protective device (9) is provided on one side of the control block (781). The protective device (9) includes a bolt (91), a mounting plate (92), a protective plate (93), an operating block (94), and a second through hole (95). The bolt (91) is inserted into the control block (781) to fix the mounting plate (92) on one side of the control block (781). The protective plate (93) is located on one side of the mounting plate (92) and is inserted on the side of the shield (73) away from the adjusting plate (72). The operating block (94) is installed on the side of the bolt (91) away from the control block (781). The second through hole (95) is opened on the side of the protective plate (93) close to the mounting plate (92). A trapezoidal block (96) is provided on the side of the protective plate (93) away from the mounting plate (92). The trapezoidal block (96) reduces the size of one side of the protective plate (93).

Images