Automatic plumb bob auxiliary device for leveling rod

Abstract

The invention provides an automatic plumb bob auxiliary device for a leveling rod. Comprising a clamping device, a sliding device and a supporting rod piece. The clamping device is movably connected with the sliding device. The supporting rod piece is arranged at the lower end of the sliding device. The clamping device is a part for fixing the leveling rod, and the sliding device is a part for realizing the movement of the leveling rod in the plumb direction; the supporting rod piece is used for stably supporting components of the whole device. The automatic plumb bob auxiliary device for the leveling rod is convenient and efficient, the plumb bob state of the leveling rod is dynamically kept through the two free rotating faces and the gravity effect, and the leveling rod moves up and down on a plumb line through the sliding device. According to the leveling rod, advanced calibration and continuous rod erecting work of the leveling device of the leveling rod are reduced, and the functions of reducing measurement errors and improving measurement efficiency are achieved.

Description

Technical Field

[0001] The present invention belongs to the field of engineering surveying devices; in particular, it relates to an automatic plumb bob auxiliary device for a leveling staff. Background Art

[0002] In leveling surveys, construction surveys, and setting out, the operation of setting up the leveling staff in each measurement requires full-time surveyors to complete: calibrating the circular spirit level of the leveling staff in advance to ensure the accuracy of the measurement; completing the operation of setting up the leveling staff and always keeping the leveling staff in a vertical state; during processes such as elevation setting out and slope setting out, it is often necessary to move the leveling staff up and down to determine the reading, and finding the bottom of the staff at this time is the set elevation. In this process, it is very easy to produce errors when the staff setter moves the leveling staff by hand.

[0003] The existing automatic horizontal calibration and installation device for a leveling staff, with the application number: 202011277368.4 and the authorized publication number: 112284336A, and the invention name: "An Automatic Horizontal Calibration and Installation Device for a Leveling Staff", discloses an automatic horizontal calibration and installation device for a leveling staff. This automatic horizontal calibration and installation device for a leveling staff includes a support annular plate, a spherical swivel base, a rotating sphere, a leveling staff body, a top plate, and a plumb bob. Three groups of connecting rods are fixedly connected to the side wall of the spherical swivel base, and the connecting rods are fixed to the annular inner wall of the support annular plate. The rotating sphere is fitted in the spherical groove, the leveling staff body is slidably connected in the staff groove, a fixing mechanism is provided at the bottom of the rotating sphere, a first wire conduit is fixedly connected to the top of the top plate, a second wire conduit is fixedly connected to the upper surface of the support annular plate, a transmission rope is fixedly connected to the top of the plumb bob, and the transmission rope passes through the second wire conduit and the first wire conduit in sequence and is connected to the leveling staff body. This automatic horizontal calibration and installation device for a leveling staff realizes that when the user conducts surveying and mapping, the leveling staff body does not need to be manually supported and adjusted horizontally, and the leveling staff body can be automatically horizontally calibrated. However, this technology still has the following problems: transferring the calibration and leveling content of the ordinary leveling staff to the calibration and leveling of the support annular plate does not really solve the problem of automatic horizontal calibration of the leveling staff, but instead increases the operation difficulty. Moreover, the position of the lower part of the leveling staff body in the horizontal plane is fixed, and the gravity can only make it rotate based on the sphere and cannot be horizontally calibrated.

[0004] The existing leveling staff auxiliary device, with the application number: 202111426509.9 and the authorization announcement number: 114088055A, has the invention name: "A Support Frame for Measuring a Leveling Staff". This device includes: a support rod, with a sharp part provided at the bottom of the support rod; an adjusting rod, which is connected to the upper end of the support rod; a connecting block, with the adjusting rod hinged to the front of the connecting block; a clamping mechanism, which is arranged on the back of the connecting block and is used for clamping the leveling staff. There are two support rods and two adjusting rods for this support frame for measuring a leveling staff. The two support rods are used to set up the leveling staff to keep it perpendicular to the ground, and the clamping mechanism is used to clamp and fix the leveling staff on the connecting block. The operator rotates the arc part counterclockwise by holding the handle. During the eccentric rotation of the arc part, the second clamping plate is pushed towards the first clamping plate, thereby clamping the leveling staff and achieving locking and fixing, facilitating the completion of the measurement. However, it can only perform the function of fixing the leveling staff, and cannot solve the problems of the automatic plumb of the leveling staff and the need for calibration of the circular spirit level of the leveling staff, nor can it realize the function of moving the leveling staff up and down.

[0005] Based on the above existing technical problems, there is an urgent need for an automatic plumb auxiliary device for a leveling staff that can solve the above problems. Summary of the Invention

[0006] The object of the present invention is to provide an automatic plumb auxiliary device for a leveling staff.

[0007] The present invention is realized through the following technical solutions:

[0008] The present invention relates to an automatic plumb auxiliary device for a leveling staff, including: a clamping device, a sliding device, and a support rod member; the clamping device is movably connected to the sliding device, and the support rod member is arranged at the lower end of the sliding device.

[0009] Preferably, the clamping device includes: a first clamping plate 101, a second clamping plate 102, a clamping ruler back plate 103, a clamping plate ball shaft 104, a back plate ball shaft 105, a telescopic rod 106, and a handle 107; the clamping device is connected to the sliding device through the back plate ball shaft 105; the back plate ball shaft 105 is used to fix the clamping device and enable it to freely rotate around the axis of the back plate ball shaft 105.

[0010] Among them, the telescopic rod 106 is located in the sleeve of the clamping ruler back plate 103, and there is also a return spring in the sleeve. By pulling the first clamping plate 101 forcefully through the handle 107, the leveling staff is placed into the groove 1021 of the second clamping plate 102, and the handle 107 is released. The telescopic rod is pulled back by the return spring to fix the leveling staff. The telescopic rod 106 and the sleeve are made of steel.

[0011] Preferably, there are two first clamping plates 101, which are arranged opposite to each other; the two first clamping plates 101 and the clamping ruler back plate 103 are arranged in a concave shape; among them, the first clamping plates 101 are two mirror - identical aluminum alloy members, with a size larger than that of the second clamping plate 102 to protect the second clamping plate 102 from external force damage; the parallel planes of the second clamping plate 102 and the clamping ruler back plate 103 are perpendicular to each other. In particular, under the real - time adjustment of the clamping plate ball shaft 104 and the back plate ball shaft 105, after the leveling staff is stabilized, it is only affected by gravity and the vertically upward friction force of the first clamping plate 101. Therefore, the leveling staff can dynamically maintain the vertical state.

[0012] The clamping ruler back plate 103 is made of steel and is connected to the back plate ball shaft 105. The back plate ball shaft 105 is located on the center line of the back side of the clamping ruler back plate 103. There are balls inside the back plate ball shaft 105, enabling the clamping ruler back plate 103 to freely rotate around the clamping plate ball shaft 104. Under the action of the gravity of the leveling staff and the clamping device, the clamping ruler back plate 103 and the clamping ruler device rotate together around the clamping plate ball shaft 104, so that the leveling staff reaches the vertical state in the projection on the parallel plane of the clamping ruler back plate 103.

[0013] The second clamping plate 102 is fixedly arranged on the inner side surface of the first clamping plate 101 through the clamping plate ball shaft 104; the clamping plate ball shaft 104 is used to fix the second clamping plate 102 and enable it to freely rotate around the axis of the clamping plate ball shaft 104.

[0014] Among them, the clamping plate ball shaft 104 is located at the geometric center of the back surface of the second clamping plate 102. There are balls inside the clamping plate ball shaft 104, enabling the second clamping plate 102 to freely rotate around the clamping plate ball shaft 104; when the second clamping plate 102 clamps the leveling staff, it must be clamped at a position above the middle of the leveling staff. Under the action of the self - gravity of the leveling staff, the second clamping plate 102 and the leveling staff rotate together around the plate ball shaft 104, so that the leveling staff reaches the vertical state in the projection on the parallel plane of the second clamping plate 102.

[0015] Preferably, the second clamping plate 102 is provided with a groove 1021, and there is an anti - slip pad 1022 on the groove 1021; the handle 107 is arranged on the outer side surface of the first clamping plate 101; among them, the groove 1021 is located in the middle of the second clamping plate 102, and the length inside the groove 1021 is the same as that of the double - sided leveling staff, which is convenient for quickly installing the leveling staff, and the anti - slip pad 1022 prevents the leveling staff from slipping off.

[0016] Preferably, the two first clamping plates 101 are connected to the clamping ruler back plate 103 through a telescopic rod 106; there is a back plate ball shaft 105 on the back surface of the clamping ruler back plate 103, and a reset compression spring is arranged inside it.

[0017] Preferably, the sliding device includes: a vertical slider 201, a sliding plate 202, a guiding pulley 203, a hand crank 204, and a steel cable 205; the clamping device is connected to the vertical slider 201 through a backplane ball shaft 105;

[0018] The guiding pulley 203 is fixed at the top of the sliding plate 202, and its main function is to change the direction of the steel cable 205. The internal pulley is a steel pulley to reduce the friction between the rope and the pulley.

[0019] The sliding plate 202 is made of aluminum sheet, and both sides are provided with clamping grooves for clamping the vertical slider 201. The vertical slider 201 can slide up and down when clamped on the sliding plate 202. There is a steel cable fixer 2012 at the upper part of the vertical slider 201. One side of the steel cable 205 is connected to the steel cable fixer 2012 on the vertical slider 201, passes upward through the guiding pulley 203 in sequence and then is connected to the hand crank 204 downward. The middle part of the front side of the vertical slider 201 is connected to the clamp backplane 103 through the backplane ball shaft 105, and the lifting of the clamping device is realized by the lifting of the vertical slider 201.

[0020] Preferably, the vertical slider 201 is connected to the sliding plate 202 through a sliding groove 2011, and the sliding plate 202 slides along the sliding groove 2011; the guiding pulley 203 is fixedly arranged at the top of the sliding plate 202 through a first right-angle fixing member 2032, and a pulley housing 2031 is arranged outside the guiding pulley 203; the hand crank 204 includes a hand crank handle 2042 and a hand crank housing 2041, and the hand crank housing 2041 is fixed on the sliding plate 202 by bolts; the sliding device is connected to the support member through the hand crank 204.

[0021] The hand crank housing 2041 contains a transmission device and a self-locking device inside. The diameter of the steel cable is 1.5 mm. One end is connected to the inside of the hand crank 204, passes upward through the guiding pulley 203 in sequence and then is connected to the vertical slider 201 downward. During normal operation, the distance between the hand crank handle 2042 and the ground is about 1.1 - 1.2 meters, which is convenient for the operator to operate; the hand crank housing 2041 is fixed on the sliding plate 202 by bolts and does not affect the sliding of the vertical slider 201; particularly when the hand crank 204 stops, the self-locking function is realized by relying on the spring tension of the self-locking device inside the hand crank 204 to generate a huge frictional resistance. When the hand crank 204 rises and falls, the spring will be collected to reduce the friction so that the sliding device can be lifted and lowered smoothly.

[0022] Preferably, the support member includes: a support leg 301, a support leg connecting member, and a second right-angle fixing member 305; among them, the support leg connecting member includes: a square inner hole socket 303, a cylindrical ball shaft 3031, and a fastening bolt 3032; the support member fixedly connects the square inner hole socket 303 to the sliding plate 202 through a connecting fixing plate 304.

[0023] Preferably, the support leg 301 is composed of two sections, and there is a support telescopic button 302 on the support leg 301. By pressing the support telescopic button, the support leg can be telescoped to adapt to different ground pothole conditions.

[0024] Preferably, the cylindrical ball shaft 3031 is connected to the support leg 301 through a fastening bolt 3032, and the cylindrical ball shaft 3031 rotates within the square inner hole socket 303; thereby enabling the support leg 301 to swing horizontally to ensure that the vertical slider 201 can remain stable and vertical under different ground conditions. The two square inner hole sockets 303 are connected to the connection fixing plate 304 through the second right-angle fixing member 305.

[0025] The present invention has the following advantages:

[0026] (1) The ruler clamping device of the present invention has a rotating shaft with two intersecting surfaces, and can dynamically maintain the plumb state of the leveling ruler by using the action of gravity, reducing the pre-calibration of the level of the leveling ruler and the continuous work of holding the leveling ruler in the plumb state during the measurement task.

[0027] (2) The present invention has an auxiliary ruler holding function and an automatic leveling function, reducing the vertical error caused by personnel continuously holding the ruler, and at the same time liberating the ruler holding personnel and improving the measurement efficiency.

[0028] (3) The auxiliary ruler holding device of the present invention can reduce the error caused by vertically moving the leveling ruler during the surveying operation.

[0029] (4) The auxiliary ruler holding device of the present invention can minimize the error caused by unstable ruler holding by the ruler holding personnel, which is more friendly to novice operators. Description of the Drawings

[0030] Figure 1 is a schematic diagram of the overall structure of the automatic plumb assist device for a leveling ruler according to the present invention;

[0031] Figure 2 is a front view structural schematic diagram of the clamping device according to the present invention;

[0032] Figure 3 is a left view structural schematic diagram of the clamping device according to the present invention;

[0033] Figure 4 is a top view structural schematic diagram of the clamping device according to the present invention;

[0034] Figure 5 is a three-dimensional structural schematic diagram of the clamping device according to the present invention;

[0035] Figure 6 is a structural schematic diagram of the support member according to the present invention;

[0036] Figure 7 It is a schematic structural diagram of the rolling device involved in the present invention;

[0037] Figure 8 It is a front view of the rolling device involved in the present invention;

[0038] Figure 9 It is a rear view of the rolling device involved in the present invention;

[0039] Figure 10 It is a left view of the rolling device involved in the present invention;

[0040] Reference numerals in the drawings:

[0041] 101, the first clamping plate; 102, the second clamping plate; 1021, the groove; 1022, the anti-slip pad; 103, the back plate of the ruler clamp; 104, the ball shaft of the clamping plate; 105, the ball shaft of the back plate; 106, the telescopic rod; 107, the handle;

[0042] 201, the vertical sliding member; 2011, the sliding groove; 2012, the wire rope fixer; 202, the sliding plate; 203, the guiding pulley; 2031, the pulley housing; 2032, the first right-angle fixing member; 204, the hand winch; 2041, the hand winch housing; 2042, the hand winch handle; 205, the wire rope;

[0043] 301, the support leg; 302, the support telescopic button; 303, the square inner hole socket head; 3031, the cylindrical ball shaft; 3032, the fastening bolt; 304, the connecting fixing plate; 305, the second right-angle fixing member; 3051, the fixing screw. Detailed implementation manners

[0044] The present invention will be described in detail below in conjunction with specific embodiments. It should be noted that the following embodiments are only further descriptions of the present invention, but the protection scope of the present invention is not limited to the following embodiments.

[0045] Embodiment

[0046] An automatic plumb bob auxiliary device for a leveling staff in this embodiment is shown in Figure 1 as shown, and includes: a clamping device, a sliding device, and a support member; the clamping device is movably connected to the sliding device, and the support member is arranged at the lower end of the sliding device.

[0047] Further, the clamping device includes: as shown in Figures 2 - 5As shown in the figure, there are a first clamping plate 101, a second clamping plate 102, a back plate of the clamping ruler 103, a ball shaft of the clamping plate 104, a ball shaft of the back plate 105, a telescopic rod 106, and a handle 107; the clamping device is connected to the sliding device through the ball shaft of the back plate 105; among them, the telescopic rod 106 is located in the sleeve of the back plate of the clamping ruler 103, and there is also a return spring in the sleeve. By pulling the first clamping plate 101 forcefully with the handle 107, the leveling staff is placed into the groove 1021 of the second clamping plate 102, and the handle 107 is released to pull back the telescopic rod through the return spring to fix the leveling staff. The telescopic rod 106 and the sleeve are made of steel.

[0048] Further, there are two first clamping plates 101, which are arranged opposite to each other; the two first clamping plates 101 and the back plate of the clamping ruler 103 are arranged in a concave shape; among them, the first clamping plates 101 are two mirror-symmetrical aluminum alloy members, with a size larger than that of the second clamping plate 102 to protect the second clamping plate 102 from external force damage; the parallel planes of the second clamping plate 102 and the back plate of the clamping ruler 103 are perpendicular to each other. In particular, under the real-time adjustment of the ball shaft of the clamping plate 104 and the ball shaft of the back plate 105, after the leveling staff is stabilized, it only receives gravity and the vertical upward frictional force from the first clamping plate, so the leveling staff can dynamically maintain a vertical state.

[0049] The back plate of the clamping ruler 103 is made of steel and is connected to the ball shaft of the back plate 105. The ball shaft of the back plate 105 is located on the back side center line of the back plate of the clamping ruler 103. There are balls in the ball shaft of the back plate 105, enabling the back plate of the clamping ruler 103 to rotate freely around the ball shaft of the clamping plate 104. Under the action of the gravity of the leveling staff and the clamping device, the back plate of the clamping ruler 103 and the clamping ruler device rotate together around the ball shaft of the clamping plate 104, so that the leveling staff reaches a vertical state in the projection on the parallel plane of the back plate of the clamping ruler 103.

[0050] The second clamping plate 102 is fixedly arranged on the inner side surface of the first clamping plate 101 through the ball shaft of the clamping plate 104; among them, the ball shaft of the clamping plate 104 is located at the geometric center of the back surface of the second clamping plate 102. There are balls in the ball shaft of the clamping plate 104, enabling the second clamping plate 102 to rotate freely around the ball shaft of the clamping plate 104; when the second clamping plate 102 clamps the leveling staff, it must be clamped at a position above the middle of the leveling staff. Under the action of the self-gravity of the leveling staff, the second clamping plate 102 and the leveling staff rotate together around the ball shaft of the plate, so that the leveling staff reaches a vertical state in the projection on the parallel plane of the second clamping plate 102.

[0051] Further, the second clamping plate 102 is provided with a groove 1021, and there is an anti-slip pad 1022 on the groove 1021; the handle 107 is arranged on the outer side surface of the first clamping plate 101; among them, the groove 1021 is located in the middle position of the second clamping plate 102. The length in the groove 1021 is the same as that of the double-sided leveling staff, which is convenient for quickly installing the leveling staff, and the anti-slip pad 1022 prevents the leveling staff from slipping off.

[0052] Further, the two first clamping plates 101 are connected to the clamping ruler back plate 103 through telescopic rods 106; there is a back plate ball shaft 105 on the back of the clamping ruler back plate 103, and a reset compression spring is arranged therein.

[0053] Further, the sliding device includes: as shown in Figures 7 - 10 shown, a vertical slider 201, a sliding plate 202, a guide pulley 203, a hand crank 204, a steel cable 205; the clamping device is connected to the vertical slider 201 through the back plate ball shaft 105;

[0054] Furthermore, the guide pulley 203 is fixed at the top of the sliding plate 202, and its main function is to change the direction of the steel cable 205. The internal pulley is a steel pulley to reduce the friction between the rope and the pulley.

[0055] Furthermore, the sliding plate 202 is made of aluminum plate, and there are clamping grooves on both sides for clamping the vertical slider 201. The vertical slider 201 can slide up and down when clamped on the sliding plate 202. There is a steel cable fixer 2012 on the upper part of the vertical slider 201. One side of the steel cable 205 is connected to the steel cable fixer 2012 on the vertical slider 201, passes upward through the guide pulley 203 in sequence and then is connected to the hand crank 204 downward. The middle part of the front side of the vertical slider 201 is connected to the clamping ruler back plate 103 through the back plate ball shaft 105. The lifting of the clamping device is realized by the lifting of the vertical slider 201.

[0056] Further, the vertical slider 201 is connected to the sliding plate 202 through a sliding groove 2011, and the sliding plate 202 slides along the sliding groove 2011; the guide pulley 203 is fixedly arranged at the top of the sliding plate 202 through a first right-angle fixing member 2032, and a pulley housing 2031 is arranged outside the guide pulley 203; the hand crank 204 includes a hand crank handle 2042 and a hand crank housing 2041, and the hand crank housing 2041 is fixed on the sliding plate 202 through bolts; the sliding device is connected to the support member through the hand crank 204.

[0057] The hand crank housing 2041 contains a transmission device and a self-locking device inside. The diameter of the steel cable is 1.5 mm. One end is connected to the inside of the hand crank 204, passes upward through the guide pulley 203 in sequence and then is connected to the vertical slider 201 downward. During normal operation, the distance between the hand crank handle 2042 and the ground is about 1.1 - 1.2 meters, which is convenient for the operator to operate; the hand crank housing 2041 is fixed on the sliding plate 202 through bolts and does not affect the sliding of the vertical slider 201; particularly, when the hand crank 204 stops, the spring tension of the self-locking device inside the hand crank 204 generates a huge frictional resistance to realize the self-locking function. When the hand crank 204 rises and falls, the spring will collect to reduce the friction so that the sliding device can be lifted and lowered smoothly.

[0058] Further, the support rod member includes: as shown in Figure 6 the figure, it is composed of a bracket leg 301, a bracket leg connecting member, and a second right-angle fixing member 305; wherein, the bracket leg connecting member includes: a square inner hole socket head 303, a cylindrical ball shaft 3031, and a fastening bolt 3032; the support rod member fixedly connects the square inner hole socket head 303 and the sliding plate 202 through a connecting fixing plate 304.

[0059] Further, the number of the bracket legs 301 is 4, each bracket leg 301 is composed of two sections, and a bracket telescopic button 302 is arranged on each bracket leg 301. By pressing the bracket telescopic button 302, the telescopic function can be realized to adapt to different ground pothole conditions.

[0060] Further, the cylindrical ball shaft 3031 is connected to the bracket leg 301 through a fastening bolt 3032, and the cylindrical ball shaft 3031 rotates in the square inner hole socket head 303; thereby realizing the horizontal swing of the bracket leg 301 to ensure that the vertical sliding member 201 can maintain stability and be in a vertical state under different ground conditions. The two square inner hole socket heads 303 connect and fix the second right-angle fixing member 305 and the fixing plate 304 through fixing screws 3051.

[0061] The operation method of the present invention:

[0062] 1. Before use, use the hand crank 204 to fix the clamping device in the upper position. Open the bracket legs at the leveling point or the position where the leveling staff needs to be erected and wait for the measuring point. Try to make the midline of the two second clamping plates 102 above the plumb line of the measuring point.

[0063] 2. Use the handle 107 to pull open the first clamping plate 101 and the second clamping plate 102, fix the upper part of the leveling staff in the groove 1021 of the second clamping plate 102, and keep the leveling staff in a hanging state. Due to the gravity and the rotatable characteristic of the second clamping plate 102, the leveling staff can be perpendicular to the ground in the vertical plane parallel to the clamping plate. Due to the gravity and the rotatable characteristic of the second clamping plate 102, the leveling staff can be perpendicular to the ground in the vertical plane parallel to the clamping rule back plate 103. Also, because the two first clamping plates 101 and the clamping rule back plate 103 are perpendicular to each other, it is determined that the leveling staff reaches the plumb state at this time and can maintain the plumb state in real time dynamically. Adjust the position and telescopic height of the bracket leg 301 so that the bottom of the leveling staff is above the plumb line of the measuring point.

[0064] 3. Slowly shake the handle 2042 of the hand crank, and slowly lower the leveling staff until it touches the measuring point. Thus, the work of erecting the leveling staff is completed, and the leveling staff always maintains the plumb state and the manpower is liberated after the leveling staff is erected.

[0065] 4. According to the measurement needs, after reading, use the hand crank 204 to move the leveling staff up to the corresponding height while keeping the leveling staff plumb.

[0066] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various deformations or modifications within the scope of the claims, which does not affect the essence of the present invention.

Claims

1. An automatic plumb bob auxiliary device for a level rod, characterized in that: include: A clamping device, a sliding device, and a supporting rod; the clamping device is movably connected to the sliding device, and the supporting rod is arranged at the lower end of the sliding device.

2. The automatic plumb bob auxiliary device for a level rod as claimed in claim 1, characterized in that: The clamping device comprises: a first clamping plate (101), a second clamping plate (102), a clamping ruler back plate (103), a clamping plate ball bearing shaft (104), a back plate ball bearing shaft (105), a telescopic rod (106), and a handle (107); the clamping device is connected to the sliding device via the back plate ball bearing shaft (105).

3. The automatic plumb bob auxiliary device for a level rod as claimed in claim 2, characterized in that: The first clamping plates (101) are in two pieces and are arranged opposite to each other; the two first clamping plates (101) and the clamping ruler back plate (103) are arranged in a concave shape; the second clamping plate (102) is fixedly arranged on the inner side surface of the first clamping plate (101) via a clamping plate ball shaft (104).

4. The automatic plumb bob auxiliary device for a level rod as claimed in claim 2, characterized in that: The second clamping plate (102) is provided with a groove (1021), and an anti-slip pad (1022) is provided on the groove (1021); the handle (107) is provided on the outer side of the first clamping plate (101).

5. The automatic plumb bob auxiliary device for a level rod as claimed in claim 2, characterized in that: The two first clamping plates (101) are connected to the clamp ruler back plate (103) via a telescopic rod (106); a back plate ball bearing shaft (105) is provided on the back side of the clamp ruler back plate (103), and a return compression spring is arranged inside the back plate ball bearing shaft (105).

6. The automatic plumb bob auxiliary device for a level rod as claimed in claim 1, characterized in that: The sliding device comprises: a vertical sliding member (201), a sliding plate (202), a guide pulley (203), a hand crank (204), and a steel rope (205); the clamping device is connected to the vertical sliding member (201) via a back plate ball bearing shaft (105).

7. The automatic plumb bob auxiliary device for a level rod as claimed in claim 6, characterized in that: The vertical slide (201) is connected to the slide plate (202) via a slide groove (2011), and the slide plate (202) slides along the slide groove (2011); the guide pulley (203) is fixedly arranged on the top of the slide plate (202) via a first right-angle fixing member (2032), and a pulley housing (2031) is arranged outside the guide pulley (203); the hand crank (204) comprises a hand crank handle (2042) and a hand crank housing (2041), and the hand crank housing (2041) is fixed to the slide plate (202) via bolts; and the sliding device is connected to the support rod via the hand crank (204).

8. The automatic plumb bob auxiliary device for a level rod as claimed in claim 1, characterized in that: The support rod comprises: a support leg (301), a support leg connecting piece, and a second right-angle fixing piece (305); wherein the support leg connecting piece comprises: a square inner hole bearing head (303), a cylindrical ball bearing shaft (3031), and a fastening bolt (3032); the support rod is fixedly connected to the square inner hole bearing head (303) and the sliding plate (202) by connecting the fixing plate (304).

9. The automatic plumb bob auxiliary device for a level rod as claimed in claim 8, characterized in that: The support leg (301) is composed of two sections, and a support telescopic button (302) is provided on the support leg (301).

10. The automatic plumb bob auxiliary device for a level rod according to claim 8, characterized in that: The cylindrical ball bearing shaft (3031) is connected to the bracket leg (301) via a fastening bolt (3032), and the cylindrical ball bearing shaft (3031) rotates in the square inner hole bearing head (303); the two square inner hole bearing heads (303) are connected to the connecting fixing plate (304) via a second right-angle fixing piece (305).

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