Elevator door strength detection device

Abstract

The invention relates to the technical field of elevator door strength detection devices, in particular to an elevator door strength detection device which comprises a base, a lifting assembly is arranged on the front side of the top of the base, a mounting plate is arranged on the lifting assembly, mounting frames are arranged on the top of the mounting plate in a bilateral symmetry mode, and a top plate is arranged between the tops of the two mounting frames. A rotating shaft is rotationally arranged between the tops of the two mounting frames, and a pull rope is connected to the middle of the rotating shaft. According to the elevator door strength detection device, laser positioning and accurate control of the heavy hammer are achieved through an automatic mechanical structure, and workers do not need to manually adjust the position of the pendulum bob. Therefore, not only is the operation accuracy improved, but also the detection time is remarkably saved, and the detection process is simpler and more convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of elevator door strength detection devices, and in particular to an elevator door strength detection device. Background Art

[0002] An elevator is a permanent transportation device that serves several specific floors in a building. Its car runs on at least two rows of rigid tracks that are perpendicular to the horizontal plane or inclined at an angle of less than 15° to the plumb line. Nowadays, elevators are installed on every floor, and the potential safety hazards of elevators have been exposed to people one after another. Elevator doors may be hit and knocked by passengers in daily life. Once there is a problem with the elevator, it will pose a major threat to people's lives and property. Therefore, in elevator production, manufacturers should use elevator door strength testing devices to test the strength of elevator doors and then conduct evaluations.

[0003] The country is also paying more and more attention to the issue of elevator safety, and has also issued corresponding inspection specifications for elevator safety, making corresponding requirements for the impact resistance of elevator doors. When using existing elevator door strength detection devices, staff often find that: staff usually use straps to tie up the heavy pendulum and pull it up, and then use scissors to manually cut the straps after reaching a certain height, so that the heavy pendulum hits the elevator door. Due to the different sizes of different elevator doors, the points that need to be hammered are inconsistent, and then the height of the heavy pendulum needs to be adjusted when it is hoisted. Manual adjustment is difficult and requires the assistance of multiple people, especially when cutting the straps at high places requires the help of a ladder, which poses a safety hazard. Therefore, it is necessary to design an elevator door strength detection device that is easy to adjust the hammering height. Summary of the invention

[0004] In order to overcome the problem that different elevator doors have different sizes and the points that need to be hammered are inconsistent, it is necessary to adjust the height of the heavy pendulum when it is lifted. Manual adjustment is difficult and requires the assistance of multiple people. In particular, cutting the straps at high places requires the use of a ladder, which poses a safety hazard. The technical problem to be solved is: to provide an elevator door strength detection device that is easy to adjust the hammering height.

[0005] The technical solution of the present invention is: an elevator door strength detection device, including a base, a lifting assembly, a mounting plate, a mounting frame, a top plate, a rotating shaft, a pull rope, a heavy hammer, a clamping assembly, a driving assembly, and a positioning assembly. A lifting assembly is arranged on the front side of the top of the base, a mounting plate is arranged on the lifting assembly, mounting frames are symmetrically arranged on the top of the mounting plate, a top plate is arranged between the tops of the two mounting frames, a rotating shaft is rotatably arranged between the tops of the two mounting frames, a pull rope is connected to the middle of the rotating shaft, a heavy hammer is arranged at the lower part of the pull rope, clamping assemblies for clamping the heavy hammer are symmetrically arranged on the rotating shaft, a driving assembly for driving the rotating shaft to rotate is arranged on the mounting frame, and a positioning assembly that can assist in positioning the hammering point of the elevator door is arranged on the lifting assembly.

[0006] In a preferred embodiment of the present invention, the lifting assembly includes a straight slide rail, a slider, a first screw rod, a first nut and a rotating motor. The straight slide rails are symmetrically arranged on the front side of the top of the base, and sliders are slidably arranged in the straight slide rails. The side walls of the straight slide rails are each provided with a straight groove. The side walls of the straight slide rails are each provided with a first screw rod that is vertically rotatable. The first nut is screwed on the first screw rod, and the first nut passes through the straight groove through a connecting block and is connected to a nearby slider. A rotating motor is arranged on the straight slide rail, and the rotating motor is connected to the top end of the first screw rod.

[0007] The lever is pivotally connected to the side panel and has an L-shaped slotted hole at the bottom. The lever is pivotally connected to the side panel and has an L-shaped slotted hole at the bottom. The lever is pivotally connected to the side panel and has an L-shaped slotted hole at the bottom. The lever is pivotally connected to the side panel and has an L-shaped slotted hole at the bottom.

[0008] In a preferred embodiment of the present invention, the driving assembly includes a bearing seat, a worm, a second mounting seat, a servo motor and a worm wheel. The upper parts of the side walls of the two mounting frames that are away from each other are provided with bearing seats, and the worm is provided on the bearing seats. The upper parts of the rear side walls of the two mounting frames are provided with second mounting seats, and the second mounting seats are provided with servo motors. The servo motors are connected to the adjacent ends of the worm, and worm wheels are provided at both ends of the rotating shaft, which are meshed with the adjacent worms.

[0009] In a preferred embodiment of the present invention, the positioning assembly includes a fixed seat, a sliding rod, a sliding sleeve, a rotating shaft, a swing rod, and a laser. The rear side wall of the right straight slide rail is symmetrically provided with a fixed seat, a sliding rod is provided between the two fixed seats, a sliding sleeve is provided on the sliding rod, a rotating shaft is rotatably provided in the middle of the rear side of the sliding sleeve, a swing rod is provided on the rotating shaft, a laser is provided at the end of the swing rod away from the rotating shaft, and a round hole is opened in the middle of the heavy hammer.

[0010] In a preferred embodiment of the present invention, it also includes a limiting assembly, which includes a second sliding block, a second screw rod, a second nut, a limiting plate, an N-shaped seat, a rotating rod, a handwheel, and a transmission assembly. A second sliding groove is opened at the lower part of the side walls of the mounting frame that are close to each other, and a second sliding block is slidingly arranged in the second sliding groove. A second screw rod is vertically rotatably arranged in the second sliding groove of the mounting frame, a second nut is embedded in the second sliding block, and the second nut is screwed together with the second screw rod. A limiting plate is arranged between the two second sliding blocks, an N-shaped seat is arranged on the middle side of the top of the mounting plate, a rotating rod is rotatably arranged between the N-shaped seat and the mounting plate, a handwheel is arranged on the top of the rotating rod, and a transmission assembly is arranged between the second screw rod and the rotating rod.

[0011] In a preferred embodiment of the present invention, it also includes a mounting platform, a cylinder and a fixed plate, a square hole is opened in the middle side of the top of the base, a mounting platform is arranged in the middle side of the top of the base, a cylinder is arranged at the bottom of the mounting platform, and the cylinder is connected to the fixed plate through the square hole.

[0012] In a preferred embodiment of the present invention, a weight block and a handle are further included. The weight block is arranged on the rear side of the top of the base, and the handle is symmetrically arranged on the weight block.

[0013] Compared with the prior art, the present invention has the following advantages: 1. The elevator door strength detection device realizes the precise control of laser positioning and heavy hammer through the automated mechanical structure, without the need for the staff to manually adjust the pendulum position. This not only improves the accuracy of the operation, but also significantly saves the detection time, making the detection process simpler and more convenient. In addition, the structural design of the device is simple, which greatly saves labor and improves the detection efficiency.

[0014] 2. When not in use, the device provides a manual support limit function. By turning the hand wheel, the weight can be easily supported and fixed, which enhances the safety and stability of the device. At the same time, the device is also equipped with stability enhancement components such as cylinders and weights to ensure that the device can remain stable during the detection process, further improving the accuracy of the detection. In addition, the design of the device is also easy to move and operate, which improves the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0016] Figure 2 It is a schematic diagram of the installation structure of the lifting assembly of the present invention.

[0017] Figure 3 It is a schematic diagram of the installation structure of the clamping assembly of the present invention.

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the clamping assembly of the present invention.

[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the driving assembly of the present invention.

[0020] Figure 6 It is a schematic diagram of the installation structure of the positioning component of the present invention.

[0021] Figure 7 It is a schematic diagram of the installation structure of the limiting component of the present invention.

[0022] Figure 8 It is a partial three-dimensional structural schematic diagram of the present invention.

[0023] In the above drawings: 1_base, 2_lifting assembly, 21_straight slide rail, 22_slider, 23_slot, 24_first screw rod, 25_first nut, 26_rotating motor, 3_mounting plate, 4_mounting frame, 5_top plate, 6_rotating shaft, 7_pull rope, 8_weight, 9_positioning assembly, 91_first mounting seat, 92_L-shaped rod, 93_first slide groove, 94_first sliding block, 95_clamp rod, 96_elastic member, 97_square hole, 98_rope, 99_clamp plate, 10_drive assembly, 101_bearing seat, 102_worm, 103 _Second mounting seat, 104_Servo motor, 105_Worm gear, 11_Positioning assembly, 111_Fixed seat, 112_Slide rod, 113_Slide sleeve, 114_Rotating shaft, 115_Swing rod, 116_Laser, 12_Limiting assembly, 121_Second slide groove, 122_Second sliding block, 123_Second screw rod, 124_Second nut, 125_Limiting plate, 126_N-shaped seat, 127_Turn rod, 128_Handwheel, 129_Transmission assembly, 13_Mounting table, 14_Cylinder, 15_Fixed plate, 16_Weight block, 17_Handle. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with specific embodiments. It should also be noted that, unless otherwise clearly specified and limited, terms such as: setting, installing, connecting, and connecting 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Example 1: Figure 1-6As shown, an elevator door strength detection device includes a base 1, a lifting component 2, a mounting plate 3, a mounting frame 4, a top plate 5, a rotating shaft 6, a pull rope 7, a heavy hammer 8, a positioning component 9, a driving component 10, and a positioning component 11. The lifting component 2 is arranged on the top front side of the base 1. The lifting component 2 includes a straight slide rail 21, a slider 22, a first screw rod 24, a first nut 25 and a rotating motor 26. The straight slide rail 21 is symmetrically arranged on the top front side of the base 1. The slider 22 is slidably arranged in the straight slide rail 21. The side walls of the straight slide rail 21 are all provided with a slot 23. The side walls of the straight slide rail 21 are vertically rotatably arranged with a first screw rod 24 away from each other. The first screw rod 24 is screwed with a first nut 25. The first nut 25 passes through the slot through a connecting block. 23 is connected with a similar slider 22, a rotating motor 26 is arranged on each of the straight slide rails 21, and the rotating motor 26 is connected with the top of the first screw rod 24, a mounting plate 3 is arranged on the lifting assembly 2, and a mounting frame 4 is symmetrically arranged on the top of the mounting plate 3, a top plate 5 is arranged between the tops of the two mounting frames 4, a rotating shaft 6 is rotatably arranged between the tops of the two mounting frames 4, a pull rope 7 is connected to the middle of the rotating shaft 6, a heavy hammer 8 is arranged at the lower part of the pull rope 7, and a clamping assembly 9 for clamping the heavy hammer 8 is symmetrically arranged on the rotating shaft 6, and the clamping assembly 9 includes a first mounting seat 91, an L-shaped rod 92, a first sliding block 94, a clamping rod 95, an elastic member 96, a rope 98 and a clamping plate 99, and a first mounting seat 91 is symmetrically arranged on the rotating shaft 6, and a first mounting seat 91 is arranged on each of the first mounting seats 91. The L-shaped rod 92 and the transverse part of the L-shaped rod 92 are both provided with a first sliding groove 93, and a first sliding block 94 is slidably arranged on the first sliding groove 93 of the transverse part of the L-shaped rod 92. The side walls of the two first sliding blocks 94 close to each other are symmetrically provided with a clamping rod 95, and the upper straight axis of the heavy hammer 8 is symmetrically provided with a clamping groove cooperating with the clamping rod 95 in the front and rear. The clamping rods 95 on the left and right sides cooperate to limit the upper straight axis of the heavy hammer 8. An elastic member 96 is arranged between the first sliding block 94 and the transverse part of the L-shaped rod 92. The elastic member 96 is a compression spring. A square hole 97 is opened on the upper side of the vertical part of the L-shaped rod 92, and an L-shaped through hole is opened on the inner side of the L-shaped rod 92. One end of the rope 98 is connected to the first sliding block 94, and the other end of the rope 98 passes through the L-shaped through hole inside the L-shaped rod 92 and is connected to the square end of the L-shaped rod 92 The top plate 5 is symmetrically provided with a card plate 99 at the bottom of the top plate 5, and an inverted V-shaped groove is opened at the bottom of the card plate 99. The card plate 99 cooperates with the rope 98. The mounting frame 4 is provided with a driving assembly 10 for driving the rotating shaft 6 to rotate. The driving assembly 10 includes a bearing seat 101, a worm 102, a second mounting seat 103, a servo motor 104 and a worm wheel 105. The upper parts of the side walls of the two mounting frames 4 that are away from each other are both provided with a bearing seat 101 by bolt connection. The worm 102 is provided on the bearing seat 101. The upper parts of the rear side walls of the two mounting frames 4 are both provided with a second mounting seat 103 by bolt connection. The second mounting seat 103 is provided with a servo motor 104. The servo motor 104 is connected to the adjacent end of the worm 102 through a coupling.Both ends of the rotating shaft 6 are provided with worm gears 105, which mesh with the adjacent worm 102. The lifting assembly 2 is provided with a positioning assembly 11 that can assist in positioning the hammering point of the elevator door. The positioning assembly 11 includes a fixed seat 111, a slide bar 112, a sliding sleeve 113, a rotating shaft 114, a swinging rod 115, and a laser 116. The rear side wall of the right straight slide rail 21 is symmetrically provided with a fixed seat 111, a slide bar 112 is provided between the two fixed seats 111, a sliding sleeve 113 is provided on the slide bar 112, a rotating shaft 114 is rotatably provided in the middle of the rear side of the sliding sleeve 113, a swinging rod 115 is provided on the rotating shaft 114, and a laser 116 is provided at the end of the swinging rod 115 away from the rotating shaft 114. A circular hole is opened in the middle of the heavy hammer 8, and the laser of the laser 116 can penetrate the circular hole of the heavy hammer 8.

[0026] When it is necessary to test the strength of the elevator door, the elevator door is first fixed on the frame, and then the staff calculates the hammer point of the elevator door and marks it. Then the staff rotates the swing rod 115, and the swing rod 115 drives the laser 116 to rotate to a horizontal position, starts the laser 116, and then adjusts the sliding sleeve 113 up and down, finally achieving that the laser point of the laser 116 coincides with the marked point, and then starts the rotating motor 26 to work, and by controlling the forward and reverse rotation of the rotating motor 26, the first screw rod 24 drives the first nut 25 to move upward or downward, thereby realizing that the mounting plate 3 drives the mounting frame 4 to move upward or downward, and the weight 8 moves upward or downward. When the laser point of the laser 116 passes through the circular hole in the middle of the weight 8 and shines on the marked point, the operation of the rotating motor 26 is stopped, the laser point is turned off, and the swing rod 115 is rotated, and the swing rod 115 drives the laser 116 to rotate to a vertical position and reset. At this time, the staff starts the servo motor 104, the servo motor 104 drives the worm 102 to rotate, the worm 102 drives the worm wheel 105 to rotate, and then the shaft 6 drives the positioning assembly 9 to swing backward, the positioning assembly 9 drives the weight 8 to swing backward, when the shaft 6 drives the positioning assembly 9 to rotate to a horizontal position, because the clamping plate 99 of the positioning assembly 9 passes through the square hole 97 to squeeze the rope 98, and then the rope 98 pulls the first sliding block 94 to move to both sides, the elastic member 96 is compressed, and the clamping rod 95 on the first sliding block 94 no longer clamps the weight 8, and the weight 8 will fall and hammer the marked point to complete the elevator door strength test. The device has a simple structure, does not require the staff to manually control the pendulum to adjust the pendulum position, is more accurate than manual operation, saves detection time, is simple and convenient, and greatly saves labor.

[0027] Example 2: Figure 1 and Figure 7As shown, on the basis of embodiment 1, it also includes a limit assembly 12, the limit assembly 12 includes a second sliding block 122, a second screw rod 123, a second nut 124, a limit plate 125, an N-shaped seat 126, a rotating rod 127, a hand wheel 128, and a transmission assembly 129. The lower part of the side walls of the mounting frame 4 close to each other is provided with a second slide groove 121, and the second sliding block 122 is slidably arranged in the second slide groove 121. The second screw rod 123 is vertically rotatably arranged in the second slide groove 121 of the mounting frame 4, and the second sliding block 122 is embedded with a second nut 124, and the second nut 124 and the second screw rod 123 is screwed together, a limit plate 125 is arranged between the two second sliding blocks 122, an N-shaped seat 126 is arranged on the middle side of the top of the mounting plate 3, a rotating rod 127 is rotatably arranged between the N-shaped seat 126 and the mounting plate 3, a hand wheel 128 is arranged on the top of the rotating rod 127, a transmission assembly 129 is arranged between the second screw rod 123 and the rotating rod 127, the transmission assembly 129 consists of two pulleys and a flat belt, two pulleys are arranged on the rotating rod 127, a pulley is arranged at the lower part of the second screw rod 123, the pulleys at the lower part of the second screw rod 123 are staggered, and a flat belt is wound between the two pulleys at the same horizontal position.

[0028] When not in use, the staff manually turns the handwheel 128, and the handwheel 128 drives the second screw rod 123 to rotate through the transmission assembly 129. The second screw rod 123 drives the second nut 124 to move upward, and then the second sliding block 122 drives the limiting plate 125 to move upward and then engage with the bottom of the heavy hammer 8, which can support and limit the heavy hammer 8.

[0029] like Figure 8 As shown, it also includes a mounting platform 13, a cylinder 14 and a fixing plate 15. A square hole is opened in the middle of the top of the base 1. The mounting platform 13 is arranged on the middle of the top of the base 1 through a bracket. The cylinder 14 is arranged at the bottom of the mounting platform 13 by bolt connection. The cylinder 14 is connected to the fixing plate 15 through the square hole.

[0030] like Figure 8 As shown, a weight block 16 and a handle 17 are also included. The weight block 16 is arranged on the top rear side of the base 1, and the handle 17 is symmetrically arranged on the weight block 16.

[0031] When conducting strength testing, the staff can control the extension of the cylinder 14 to drive the fixed plate 15 to move downward and contact the ground, thereby maintaining the stability of the device during testing. The setting of the weight 16 is also used to maintain the stability of the device, and the handle 17 makes it easier to push the device to move.

[0032] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An elevator door strength detection device, characterized in that: The invention comprises a base (1), a lifting assembly (2) is arranged on the front side of the top of the base (1), a mounting plate (3) is arranged on the lifting assembly (2), a mounting frame (4) is symmetrically arranged on the top of the mounting plate (3), a top plate (5) is arranged between the tops of the two mounting frames (4), a rotating shaft (6) is rotatably arranged between the tops of the two mounting frames (4), a pull rope (7) is connected to the middle of the rotating shaft (6), a heavy hammer (8) is arranged at the lower part of the pull rope (7), a clamping assembly (9) for clamping the heavy hammer (8) is symmetrically arranged on the rotating shaft (6), a driving assembly (10) for driving the rotating shaft (6) to rotate is arranged on the mounting frame (4), and a positioning assembly (11) capable of assisting in positioning the hammering point of the elevator door is arranged on the lifting assembly (2).

2. An elevator door strength detection device according to claim 1, characterized in that: The lifting assembly (2) comprises a straight slide rail (21), the straight slide rail (21) is symmetrically arranged on the front side of the top of the base (1), a slider (22) is slidably arranged inside the straight slide rail (21), a straight groove (23) is opened on the side wall of the straight slide rail (21), a first screw rod (24) is vertically rotatably arranged on the side walls away from each other of the straight slide rail (21), a first nut (25) is screwed on the first screw rod (24), the first nut (25) passes through the straight groove (23) through a connecting block and is connected to the adjacent slider (22), and a rotating motor (26) is arranged on the straight slide rail (21), and the rotating motor (26) is connected to the top of the first screw rod (24).

3. An elevator door strength detection device according to claim 2, characterized in that: The clamping assembly (9) includes a first mounting seat (91), the first mounting seat (91) is symmetrically arranged on the rotating shaft (6), an L-shaped rod (92) is arranged on the first mounting seat (91), the transverse part of the L-shaped rod (92) is provided with a first sliding groove (93), a first sliding block (94) is slidably arranged on the first sliding groove (93) of the transverse part of the L-shaped rod (92), and the side walls of the two first sliding blocks (94) close to each other are symmetrically arranged with clamping rods (95) on the upper and lower sides, and the clamping rods (95) on the left and right sides cooperate to limit the upper straight axis of the heavy hammer (8), and the first sliding block An elastic member (96) is arranged between the first sliding block (94) and the horizontal part of the L-shaped rod (92), a square hole (97) is opened on the upper side of the vertical part of the L-shaped rod (92), an L-shaped through hole is opened on the inner side of the L-shaped rod (92), one end of a rope (98) is connected to the first sliding block (94), and the other end of the rope (98) passes through the L-shaped through hole on the inner side of the L-shaped rod (92) and is connected to the upper position of the square hole (97) of the L-shaped rod (92), and a card plate (99) is symmetrically arranged at the bottom of the top plate (5), and an inverted V-shaped groove is opened at the bottom of the card plate (99), and the card plate (99) cooperates with the rope (98).

4. An elevator door strength detection device according to claim 3, characterized in that: The driving assembly (10) comprises a bearing seat (101), the bearing seat (101) is arranged on the upper part of the side walls of the two mounting frames (4) which are far away from each other, a worm (102) is arranged on the bearing seat (101), a second mounting seat (103) is arranged on the upper part of the rear side walls of the two mounting frames (4), a servo motor (104) is arranged on the second mounting seat (103), the servo motor (104) is connected to the adjacent end of the worm (102), and worm wheels (105) are arranged at both ends of the rotating shaft (6), and the worm wheels (105) are meshed with the adjacent worm (102).

5. An elevator door strength detection device according to claim 4, characterized in that: The positioning assembly (11) comprises a fixed seat (111), the fixed seat (111) is symmetrically arranged on the rear side wall of the right straight slide rail (21) in the upper and lower directions, a sliding rod (112) is arranged between the two fixed seats (111), a sliding sleeve (113) is arranged on the sliding rod (112), a rotating shaft (114) is rotatably arranged in the middle of the rear side of the sliding sleeve (113), a swinging rod (115) is arranged on the rotating shaft (114), a laser (116) is arranged at one end of the swinging rod (115) away from the rotating shaft (114), and a circular hole is opened in the middle of the weight (8).

6. An elevator door strength detection device according to claim 5, characterized in that: The device also includes a limit assembly (12), the limit assembly (12) including a second sliding block (122), the lower parts of the side walls of the mounting frame (4) close to each other are each provided with a second sliding groove (121), a second sliding block (122) is slidingly arranged in the second sliding groove (121), a second screw rod (123) is vertically rotatably arranged in the second sliding groove (121) of the mounting frame (4), a second nut (124) is embedded in the second sliding block (122), and the second nut (124) is The nut (124) is screwed together with the second screw rod (123), a limit plate (125) is arranged between the two second sliding blocks (122), an N-shaped seat (126) is arranged on the middle side of the top of the mounting plate (3), a rotating rod (127) is rotatably arranged between the N-shaped seat (126) and the mounting plate (3), a hand wheel (128) is arranged on the top of the rotating rod (127), and a transmission assembly (129) is arranged between the second screw rod (123) and the rotating rod (127).

7. An elevator door strength detection device according to claim 6, characterized in that: It also includes a mounting platform (13), a square hole is opened in the middle of the top of the base (1), the mounting platform (13) is arranged in the middle of the top of the base (1), a cylinder (14) is arranged at the bottom of the mounting platform (13), and the cylinder (14) passes through the square hole and is connected to a fixing plate (15).

8. An elevator door strength detection device according to claim 7, characterized in that: It also includes a weight block (16), which is arranged on the rear side of the top of the base (1), and a handle (17) is symmetrically arranged on the weight block (16).

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