Antiskid measuring instrument tripod

Abstract

The utility model relates to an antiskid measuring instrument tripod which comprises a top plate and three telescopic supporting legs, each supporting leg comprises an upper section and a lower section, the upper section comprises two clamping rods, the upper ends of the two clamping rods are hinged to the top plate, and the lower section is arranged between the two clamping rods in a sliding mode; each supporting leg is provided with a fastening device and an anti-skid device, the fastening device can abut against the upper section and the lower section of the supporting leg through a fastening bolt, the anti-skid device comprises a plug pin, two clamping plates and an elastic handle, the plug pin penetrates through the upper end of the lower section, the two clamping plates penetrate through the two ends of the plug pin, one end of the plug pin is in threaded connection with a nut, and the other end of the plug pin penetrates through a rotating shaft. And the elastic handle is rotationally arranged on the rotating shaft, and the two clamping plates clamp the two clamping rods of the upper section of the supporting leg by rotating the elastic handle. The two sections of the supporting leg are locked through the fastening device and the anti-skid device at the same time, the stability of the supporting leg is improved, and therefore the stable structure of the tripod is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering measurement and relates to an anti-slip tripod for setting up a measuring instrument. Background Art

[0002] Engineering surveying instruments and equipment need to be mounted on a tripod during use. The tripod includes a top plate and three legs equidistantly arranged in a circular direction. The top plate is used to fix the surveying equipment. The upper ends of the three legs are hinged around the top plate. The length of each leg is adjustable and is used to adjust the height of the tripod. Usually, each leg includes two sliding sleeves. A fixing bolt is passed through the outer sleeve. The front end of the fixing bolt is against the inner sleeve. Loosen the fixing bolt, slide the inner and outer sleeves relative to each other to adjust the length of the leg. After adjusting to the appropriate length, tighten the fixing bolt to fix the inner and outer sleeves. However, during use, the fixing bolt may not be completely tightened, or it may become loose after being tightened, resulting in relative sliding between the inner and outer sleeves, causing the tripod structure to become unstable, affecting the measurement accuracy; it may even cause the tripod to topple over and the surveying instrument to fall. Summary of the invention

[0003] The utility model aims to solve the above problems and provide a non-slip measuring instrument tripod to ensure that the supporting structure of the tripod is firm.

[0004] The technical solution of the utility model is as follows:

[0005] A non-slip measuring instrument tripod, comprising a top plate, three retractable legs equidistantly arranged around the top plate, each leg having an upper end hinged to the top plate, characterized in that:

[0006] Each leg includes an upper section and a lower section, the upper section includes two clamping rods, there is a certain distance between the two clamping rods, the upper ends of the two clamping rods are hinged to the top plate, the lower section is slidably arranged between the two clamping rods, and a transverse through hole is arranged at the upper end of the lower section;

[0007] Each leg is provided with a fastening device, which includes a sleeve and a fastening bolt. The sleeve is sleeved on the lower ends of the two clamping rods of the upper section, the inner wall of one side of the sleeve is welded to one clamping rod, and the fastening bolt is passed through the other side of the sleeve, and the front end of the fastening bolt is against the side wall of the other clamping rod;

[0008] Each leg is also provided with an anti-slip device, which includes a latch, two clamps and an elastic handle; the latch is inserted into the transverse through hole at the upper end of the lower segment, and the two clamps are respectively inserted on the latch on both sides of the lower segment, and the two ends of each clamp are respectively located on the outside of the two clamping rods, one end of the latch is screwed with a nut on the outside of one clamp, and the other end of the latch is inserted through a rotating shaft on the outside of the other clamp along the transverse direction of the latch, and the elastic handle is rotatably arranged on the rotating shaft; the elastic handle is a U-shaped structure, including two parallel pressure plates with plate surfaces perpendicular to the clamps, the rear ends of the two pressure plates are fixedly connected by a connecting rod, the front end of each pressure plate is arc-shaped, the front ends of the two pressure plates are respectively inserted at both ends of the rotating shaft, and the distance between the axial center of the rotating shaft and one side of the arc-shaped front end of the pressure plate is smaller than the distance to the other side.

[0009] In addition to the traditional fastening bolts, the utility model also provides an anti-skid protection device on each telescopic leg of the tripod. The fastening bolts and the anti-skid device lock the two sections of the legs at the same time, thereby increasing the stability and reliability of the legs. During use, relative sliding between the two sections of the legs can be effectively prevented, thereby ensuring the stability of the tripod structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall side structure of the utility model;

[0011] Figure 2 It is a side view structural diagram of the lower section of one leg of a tripod;

[0012] Figure 3 It is a schematic diagram of the cross section of the tripod legs where the fastening bolts are installed;

[0013] Figure 4 It is a schematic cross-sectional view of the tripod legs where the anti-slip device is installed;

[0014] Figure 5 is a schematic diagram of the side structure of the anti-slip device when the elastic handle is loosened;

[0015] Figure 6 It is a schematic diagram of the side structure of the anti-slip device when the elastic handle is compressed. DETAILED DESCRIPTION

[0016] like Figures 1 to 6 As shown, the measuring instrument tripod comprises a top plate 1, and three retractable legs 2 are equidistantly arranged around the top plate, and the upper end of each leg 2 is hinged to the top plate 1;

[0017] Each leg 2 includes an upper section and a lower section, wherein the upper section includes two clamping rods 21, and there is a certain distance between the two clamping rods 21. The upper ends of the two clamping rods 21 are hinged to the top plate 1, and the lower section 22 is slidably arranged between the two clamping rods 21; Figure 2As shown, a transverse through hole 221 is provided at the upper end of the lower segment 22;

[0018] Each leg 2 is provided with a fastening device 3, such as Figure 3 As shown, the fastening device 3 includes a sleeve 31 and a fastening bolt 32. The sleeve 31 is sleeved on the lower ends of the two clamping rods 21 of the upper section. The inner wall of one side of the sleeve 31 is welded to one clamping rod 21. The fastening bolt 32 is passed through the other side of the sleeve 31. The front end of the fastening bolt 32 presses against the side wall of the other clamping rod 21.

[0019] Each leg 2 is also provided with an anti-slip device 4; Figures 4 to 6 As shown, the anti-slip device 4 includes a latch 41, two clamping plates 42 and a tension handle 43; the latch 41 is inserted into the transverse through hole 221 at the upper end of the lower segment 22, and the two clamping plates 42 are respectively inserted on the latch 41 on both sides of the lower segment 22, and the two ends of each clamping plate 42 are respectively located on the outside of the two clamping rods 21, and one end of the latch 41 is screwed to a nut 44 on the outside of one clamping plate, and the other end of the latch 41 is inserted on the outside of the other clamping plate along the transverse direction of the latch. A rotating shaft 45, the elastic handle 43 is rotatably set on the rotating shaft 45; the elastic handle 43 is a U-shaped structure, including two parallel pressure plates 431 with the plate surface perpendicular to the clamping plate, the rear ends of the two pressure plates 431 are fixedly connected by a connecting rod 432, the front end of each pressure plate 431 is arc-shaped, the front ends of the two pressure plates are respectively passed through the two ends of the rotating shaft 45, and the distance between the axis center of the rotating shaft 45 and one side of the arc-shaped front end of the pressure plate 431 is smaller than the distance to the other side.

[0020] The above structure, such as Figure 1 , Figure 3 As shown, loosen the fastening bolts 32 of the fastening device on the leg, and at the same time Figure 5 As shown, the tension handle 43 is pulled upward to make the front end of the pressure plate 431 closer to the rotating shaft face the clamping plate 42, and the lower segment 22 of the leg can slide up and down between the two clamping rods 21 of the upper segment, so as to adjust the length of the leg; after the length is adjusted to the right position, the fastening bolt 32 is turned to tighten the clamping rod 21, so that the distance between the two clamping rods 21 of the upper segment can be reduced, and the two clamping rods 21 clamp the lower segment 22 to prevent relative sliding between the upper and lower segments; then Figure 6 As shown, by pressing the tension handle 43 downward, the front end of the pressure plate 431 is directed toward the side with a larger distance from the rotating shaft and presses the clamping plate 42, so that the two clamping plates 42 can clamp the two pressure rods 21. Relying on the friction between the clamping plates 42 and the clamping rods 21, relative sliding between the upper and lower sections of the leg is further prevented, thereby reliably fixing the length of the leg 2.

[0021] When the utility model is implemented, Figure 3 , Figure 4As shown, in order to ensure linear sliding between the upper and lower sections when the length of the leg 2 is adjusted, the cross-section of the two clamping rods 21 of the upper section of each leg is set to be circular, and the lower section 22 is provided with an arc groove along the longitudinal direction on both sides of the two clamping rods. The two clamping rods 21 are respectively clamped in the arc grooves on both sides of the lower section 22, and the arc grooves play a guiding role when the upper and lower sections slide relative to each other; at the same time, in order to ensure that the two clamping plates 52 of the anti-slip device can clamp the two clamping rods 21, the diameter of the clamping rod 21 is set to be no less than the thickness of the lower section 22.

[0022] Furthermore, in order to ensure that the two clamping plates of the anti-slip device can clamp the two clamping rods and prevent the two clamping rods from bending outward, both ends of each clamping plate 42 of the anti-slip device can be arc-shaped, the arc-shaped ends of the two clamping plates 42 are relatively bent, and the distance between the opposite arc-shaped ends of the two clamping plates 42 is smaller than the diameter of the clamping rod 21.

[0023] The usage of the utility model is as follows:

[0024] When adjusting the length of each leg 2 of the tripod, first loosen the tension handle 43 of the anti-skid device 4, then loosen the fastening bolt 32 of the fastening device 3, slide the lower section of the leg up and down, and after adjusting the leg to an appropriate length, first tighten the fastening bolt 32, and then tighten the tension handle 43. After all legs are adjusted, install the measuring instrument 5 on the top plate of the tripod for measurement. Even if the fastening bolt 32 is not completely tightened, or the fastening bolt is loosened during the measurement process, the anti-skid device 4 can still ensure that the length of the leg is fixed, thereby ensuring the stability of the tripod, the measurement accuracy and the safety of the measuring instrument.

Claims

1. A non-slip measuring instrument tripod, comprising a top plate, three retractable legs equidistantly arranged around the top plate, each leg having an upper end hinged to the top plate, characterized in that: Each leg includes an upper section and a lower section, the upper section includes two clamping rods, there is a certain distance between the two clamping rods, the upper ends of the two clamping rods are hinged to the top plate, the lower section is slidably arranged between the two clamping rods, and a transverse through hole is arranged at the upper end of the lower section; Each leg is provided with a fastening device, which includes a sleeve and a fastening bolt. The sleeve is sleeved on the lower ends of the two clamping rods of the upper section, the inner wall of one side of the sleeve is welded to one clamping rod, and the fastening bolt is passed through the other side of the sleeve, and the front end of the fastening bolt is against the side wall of the other clamping rod; Each leg is also provided with an anti-slip device, which includes a latch, two clamps and an elastic handle; the latch is inserted into the transverse through hole at the upper end of the lower segment, and the two clamps are respectively inserted on the latch on both sides of the lower segment, and the two ends of each clamp are respectively located on the outside of the two clamping rods, one end of the latch is screwed with a nut on the outside of one clamp, and the other end of the latch is inserted through a rotating shaft on the outside of the other clamp along the transverse direction of the latch, and the elastic handle is rotatably arranged on the rotating shaft; the elastic handle is a U-shaped structure, including two parallel pressure plates with plate surfaces perpendicular to the clamps, the rear ends of the two pressure plates are fixedly connected by a connecting rod, the front end of each pressure plate is arc-shaped, the front ends of the two pressure plates are respectively inserted at both ends of the rotating shaft, and the distance between the axial center of the rotating shaft and one side of the arc-shaped front end of the pressure plate is smaller than the distance to the other side.

2. The anti-slip measuring instrument tripod according to claim 1, characterized in that: The cross-section of the two clamping rods of the upper section of each leg is circular, and the lower section is provided with an arc groove along the longitudinal direction on both sides of the two clamping rods. The two clamping rods are respectively clamped in the arc grooves on both sides of the lower section, and the diameter of the clamping rod is not less than the thickness of the lower section.

3. The anti-slip measuring instrument tripod according to claim 2, characterized in that: Both ends of each clamping plate of the anti-slip device are arc-shaped, the arc-shaped ends of the two clamping plates are bent relatively, and the distance between the arc-shaped ends of the two clamping plates is smaller than the diameter of the clamping rod.

Images