Ground anti-skid supporting mechanism of surveying instrument tripod

Abstract

The present application relates to support mechanism technical field, specifically said is a kind of surveying instrument tripod ground antiskid support mechanism, including connecting sleeve, retainer and two symmetrical arrangements of extension frame.Connecting sleeve below is connected rotary shaft by hinged frame, rotary shaft extends into the stroke groove of retainer and is sleeved with first bevel gear, first bevel gear two sides mesh with second bevel gear and coaxially connect screw rod, stroke slider is threadedly engaged on screw rod, and stroke slider is transmissionally connected with extension frame by hinged extension rod;Extension frame is equipped with the extension film that is rolled up, and film end is connected with retainer.The present application can synchronously unfold two sides extension frame by rotating transmission, synchronously pull out extension film and form continuous antiskid surface, substantially increase ground contact area and support span, significantly improve tripod antiskid performance and anti-overturning stability;When accommodating, film is automatically rolled up, and overall structure is compact and portable, easy to operate, and adapt to various surveying tripods.

Description

Technical Field

[0001] This invention relates to the field of support mechanism technology, specifically to a ground anti-slip support mechanism for a surveying instrument tripod. Background Technology

[0002] In surveying operations, tripods are the core support equipment for carrying precision surveying instruments such as total stations, levels, and theodolites. The anti-slip capability of the tripod legs in contact with the ground directly determines the stability of the support, which in turn affects the accuracy of the measurement data and the safety of the instruments and equipment.

[0003] Existing conventional surveying tripods typically have metal cones at the bottom of their legs. When working on soft ground such as soil or grass, the cones can be inserted into the ground for anchoring and provide good anti-slip properties. However, when working on smooth, hard ground such as cement, tile, or icy surfaces, the cones only make point contact with the ground, resulting in minimal contact area and insufficient friction. When subjected to lateral forces or when the instrument's center of gravity shifts, the tripods are prone to slipping and tipping over. This can lead to minor issues like invalid measurement data and rework, or even serious damage to precision surveying instruments, resulting in significant economic losses and operational risks.

[0004] To address the aforementioned issues, existing solutions often involve attaching rubber anti-slip sleeves to the tips of the legs. While this can improve the coefficient of friction to some extent, the increase in contact area is very limited, and slippage still easily occurs under tilted force or external contact. Some deployable anti-slip support structures suffer from drawbacks such as complex structure, cumbersome deployment procedures, and large storage volume. Furthermore, after deployment, there are multiple gaps on the support surface, resulting in uneven anti-slip force distribution. These structures cannot simultaneously meet the dual requirements of portability and high anti-slip performance, making them unsuitable for complex and ever-changing outdoor surveying and mapping scenarios. Summary of the Invention

[0005] To address the problems in the prior art, the present invention provides a ground anti-slip support mechanism for a surveying instrument tripod.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a ground anti-slip support mechanism for a tripod of a surveying instrument, including a connecting sleeve, a retainer and an extension frame, wherein the retainer is disposed below the connecting sleeve, and two extension frames are provided, and the two extension frames are symmetrically disposed on both sides of the retainer. The bottom pin of the connecting sleeve is rotatably connected to a hinge frame, and the bottom of the hinge frame is fixedly connected to a rotating shaft. The cage has a travel groove inside. The other end of the rotating shaft is rotatably connected to the cage, and a first bevel gear is fixedly sleeved on one end of the rotating shaft extending into the travel groove. A second bevel gear is symmetrically arranged on both sides of the first bevel gear. A lead screw is fixedly connected to the second bevel gear on the coaxial axis. A travel slider is threaded onto the wall of each of the two lead screws. The travel slider is slidably connected inside the travel groove. A hinge groove and a recess are provided at both ends of the travel slider. The hinge groove and the recess are staggered. An extension rod is hinged inside the hinge groove by a pin. The two extension rods on the same side of the two travel sliders are staggered vertically. The extension frame has hinge blocks fixedly connected to both ends near the retainer. The hinge blocks are hinged to the adjacent extension rods. The side of the extension frame away from the retainer has an installation groove. An extension film roll is wound inside the installation groove by a rotating rod. The other end of the extension film roll moves through the bottom of the extension frame and is connected to the retainer.

[0007] Specifically, locking plates are fixedly connected to both sides of the hinge frame, and a through groove is opened through the top of the locking plate. A spherical locking block is fixedly embedded in the top of the retainer at the position corresponding to the through groove, and the locking block is inserted into the inside of the through groove.

[0008] Specifically, a sealing block is embedded in the outer wall of the extension frame at the position corresponding to the mounting groove.

[0009] Specifically, the bottom of the retainer has a slot, and a locking block is inserted into the slot. The stretch film extends through the retainer into the slot and is locked in place by the locking block.

[0010] Specifically, both ends of the rotating rod are fitted with springs, and the two ends of the springs are fixed to the inner walls of the rotating rod and the mounting groove, respectively.

[0011] The beneficial effects of this invention are: (1) The ground anti-slip support mechanism for a surveying instrument tripod described in this invention adopts a linkage transmission structure composed of a first bevel gear and two second bevel gears on both sides, and is equipped with a transmission pair of a lead screw and a stroke slider. The extension frames on both sides can be synchronously driven to unfold outward by rotating the hinge frame, which can quickly increase the lateral support span of the support mechanism and effectively improve the anti-overturning ability. The unfolding and folding operations are completed by a single-step rotation, without the need for additional auxiliary tools. The operation is simple and efficient, with good transmission synchronization and balanced support force.

[0012] (2) The ground anti-slip support mechanism for a surveying instrument tripod described in this invention integrates a retractable extended film inside the extended frame. During the unfolding of the extended frame, the extended film can be pulled out and laid flat simultaneously, forming a continuous and complete anti-slip support surface between the retainer and the extended frame. This significantly increases the total contact area between the support mechanism and the ground, greatly increases the friction, and provides a significant anti-slip effect. When stored, the extended film can be automatically wound back to its original position under the action of a spring. After storage, the overall structure is compact and small, without adding extra storage volume to the tripod, making it convenient for outdoor carrying and storage. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0014] Figure 1 A schematic diagram of the anti-slip support mechanism for a surveying instrument tripod provided by the present invention. Figure 1 ; Figure 2 A schematic diagram of the anti-slip support mechanism for a surveying instrument tripod provided by the present invention. Figure 2 ; Figure 3 A cross-sectional view of a ground anti-slip support mechanism for a surveying instrument tripod provided by the present invention; Figure 4 for Figure 3 A magnified view of part A in the middle; Figure 5 An exploded view of a ground anti-slip support mechanism for a surveying instrument tripod provided by the present invention; Figure 6 This is a schematic diagram of the structure of a ground anti-slip support mechanism for a surveying instrument tripod provided by the present invention.

[0015] In the diagram: 1. Connecting sleeve; 2. Pin; 3. Hinge frame; 4. Locking plate; 5. Rotating shaft; 6. Cage; 7. First bevel gear; 8. Lead screw; 9. Second bevel gear; 10. Locking block; 11. Stroke groove; 12. Stroke slider; 13. Hinge groove; 14. Groove; 15. Extension rod; 16. Pin; 17. Extension frame; 18. Hinge block; 19. Mounting groove; 20. Sealing block; 21. Rotating rod; 22. Extension film; 23. Locking block. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0017] like Figures 1-6As shown, the ground anti-slip support mechanism for a surveying instrument tripod according to the present invention includes a connecting sleeve 1, a retainer 6, and an extension frame 17. The retainer 6 is located below the connecting sleeve 1, and two extension frames 17 are provided, symmetrically arranged on both sides of the retainer 6. A hinge frame 3 is rotatably connected to the bottom pin 2 of the connecting sleeve 1, and a rotating shaft 5 is fixedly connected to the bottom of the hinge frame 3. A stroke groove 11 is provided inside the retainer 6, and the other end of the rotating shaft 5 is rotatably connected to the retainer 6. A first bevel gear 7 is fixedly sleeved at one end of the rotating shaft 5 extending into the stroke groove 11. Second bevel gears 9 are symmetrically arranged on both sides of the first bevel gear 7, and lead screws 8 are coaxially fixedly connected to the second bevel gears 9. The walls of the two lead screws 8 are... Each stroke slider 12 is threaded and slidably connected inside the stroke groove 11. Both ends of the stroke slider 12 are provided with hinge grooves 13 and grooves 14, which are staggered. An extension rod 15 is hinged inside the hinge groove 13 by a pin 16. The two extension rods 15 on the same side of the two stroke sliders 12 are staggered. Both ends of the extension frame 17 near the retainer 6 are fixedly connected with hinge blocks 18, which are hinged to the adjacent extension rods 15. An installation groove 19 is provided on the side of the extension frame 17 away from the retainer 6. An extension film roll 22 is wound inside the installation groove 19 by a rotating rod 21. The other end of the extension film roll 22 moves through the bottom of the extension frame 17 and is connected to the retainer 6. Locking plates 4 are fixedly connected to both sides of the hinge frame 3. A through slot is opened through the top of the locking plate 4. A spherical locking block 10 is fixedly embedded in the top of the retainer 6 at the position corresponding to the through slot. The locking block 10 is inserted into the through slot and the spherical locking block 10 is inserted into the through slot on the locking plate 4 to prevent relative rotation between the hinge frame 3 and the retainer 6. A sealing block 20 is embedded in the outer wall of the extension frame 17 at the position corresponding to the mounting slot 19. The sealing block 20 can close the mounting slot 19. A slot is opened at the bottom of the retainer 6, and a locking block 23 is inserted into the slot. The extension film 22 extends through the retainer 6 into the slot and is locked by the locking block 23, which makes it easier to install and remove the extension film 22. Both ends of the rotating rod 21 are fitted with springs, and the two ends of the springs are fixed to the inner walls of the rotating rod 21 and the mounting slot 19, respectively, so that the extension film 22 can automatically return to its original position under the action of the springs after being stretched and unfolded.

[0018] Example 1: This embodiment provides a ground anti-slip support mechanism for a surveying instrument tripod, such as... Figures 1 to 6 As shown, it includes a connecting sleeve 1, a retainer 6, and an extension frame 17. The retainer 6 is located directly below the connecting sleeve 1. There are two extension frames 17, which are symmetrically arranged on the left and right sides of the retainer 6 with the longitudinal central axis of the retainer 6 as the center.

[0019] The connecting sleeve 1 is a hollow cylindrical structure that runs vertically through the top and bottom, used to fit and fix it to the bottom of the legs of the surveying instrument tripod. The bottom of the connecting sleeve 1 is rotatably connected to the hinge frame 3 via a horizontally arranged pin 2, and a rotating shaft 5 is vertically fixed to the center of the bottom of the hinge frame 3. The retainer 6 is a long strip-shaped sealed shell with a stroke groove 11 opened inside along its own length. The lower end of the rotating shaft 5 passes through the top wall of the retainer 6 and extends into the interior of the stroke groove 11, and the rotating shaft 5 is rotatably connected to the top wall of the retainer 6 via a bearing.

[0020] A first bevel gear 7 is fixedly sleeved at one end of the rotating shaft 5 extending into the stroke groove 11. Second bevel gears 9 are symmetrically meshed on the left and right sides of the first bevel gear 7. Lead screws 8 are coaxially fixedly connected to the opposite end faces of the two second bevel gears 9. The other ends of the two lead screws 8 are rotatably connected to the left and right end walls of the stroke groove 11 via bearings. Stroke sliders 12 are threaded onto the walls of both lead screws 8. The upper and lower end faces of the stroke sliders 12 slide against the inner wall of the stroke groove 11, forming a circumferential limit on the stroke sliders 12, allowing the stroke sliders 12 to reciprocate horizontally along the axial direction of the lead screw 8 when the lead screw 8 rotates.

[0021] Each stroke slider 12 has a hinge groove 13 and a groove 14 on its front and rear end side walls. The hinge groove 13 and the groove 14 are staggered. An extension rod 15 is hinged inside the hinge groove 13 by a horizontally arranged pin 16. The two extension rods 15 on the same side of the two stroke sliders 12 are arranged vertically and staggered to avoid structural interference during the movement towards each other.

[0022] The front and rear ends of the extension frame 17 near the retainer 6 are fixedly connected to hinge blocks 18. Each hinge block 18 is hinged to the outer end of an adjacent extension rod 15, forming a scissor-type extension transmission structure. The side of the extension frame 17 away from the retainer 6 has an installation groove 19. A rotating rod 21 is rotatably connected inside the installation groove 19. An extension film roll 22 is wound on the rod of the rotating rod 21. A cable exit opening is opened at the bottom of the extension frame 17 corresponding to the position of the installation groove 19. The free end of the extension film roll 22 passes through the cable exit opening and finally extends to the bottom of the retainer 6 and is fixedly connected to the retainer 6.

[0023] Locking plates 4 are horizontally fixedly connected to both sides of the hinge frame 3. A through slot is opened vertically on the plate body of the locking plate 4. Spherical locking blocks 10 are fixedly embedded in the top of the retainer 6 at the positions corresponding to the two through slots. When the support mechanism is in the retracted state, the spherical locking blocks 10 are inserted into the through slots of the locking plate 4, and the relative rotation between the hinge frame 3 and the retainer 6 is restricted by the elastic locking action, so as to prevent the mechanism from unfolding on its own in the retracted state.

[0024] A sealing block 20 is embedded in the outer wall of the extension frame 17 at the position corresponding to the mounting slot 19. Removing the sealing block 20 allows for the inspection or replacement of the rotating rod 21 and the extended film roll 22 inside the mounting slot 19. A slot is provided at the bottom of the retainer 6, and a locking block 23 is inserted into the slot. The end of the extended film roll 22 extends through the retainer 6 into the slot and is locked in place by the locking block 23, making the disassembly and replacement of the extended film roll 22 simple and quick. Both ends of the rotating rod 21 are fitted with springs. The inner end of the spring is fixedly connected to the rotating rod 21, and the outer end is fixedly connected to the inner wall of the mounting slot 19, providing a constant winding torque for the rotating rod 21.

[0025] The usage process of this embodiment is as follows: Before operation, the connecting sleeve 1 is fitted onto the bottom end of the tripod legs and fixed. Press down on the hinge frame 3 to disengage the through groove of the locking plate 4 from the spherical locking block 10. Then rotate the hinge frame 3. The hinge frame 3 drives the rotating shaft 5 to rotate synchronously with the first bevel gear 7. After the second bevel gears 9 on both sides reverse the transmission, they drive the two lead screws 8 to rotate synchronously, thereby driving the two stroke sliders 12 to move towards each other along the stroke groove 11. During the movement of the stroke sliders 12, the extension rod 15 pushes the extension frames 17 on both sides to expand outward horizontally in sync. As the extension frames 17 move away from the retainer 6, the retracted extension film roll 22 is gradually pulled out and laid flat, forming a continuous large-area anti-slip support surface on the ground between the retainer 6 and the extension frame 17. After the unfolding operation is completed, the surveying operation can begin. When storing, the hinge frame 3 is rotated in the opposite direction, causing the stroke slider 12 to move in opposite directions, pulling the extension frame 17 closer to the retainer 6 to reset. At the same time, the rotating rod 21 automatically winds up the extension film 22 under the torque of the spring until the spherical locking block 10 is re-engaged into the through groove of the locking plate 4, completing the storage and locking.

[0026] Example 2: This embodiment provides a ground anti-slip support mechanism for a surveying instrument tripod. Its main structure is basically the same as that of Embodiment 1, except that: the lower surface of the extended film roll 22 is integrally pressed with staggered diamond anti-slip patterns, and the extended film roll 22 is made of wear-resistant nitrile rubber, which can further improve the coefficient of friction and wear resistance service life with smooth ground; at the same time, anti-slip rubber pads are attached to the bottom surfaces of the retainer 6 and the two extended frames 17. The bottom surface of the anti-slip rubber pads is at the same level as the bottom surface of the extended film roll 22 after it is unfolded, ensuring that the entire support mechanism is fully in contact with the ground after unfolding.

[0027] In this embodiment, an elastic clamping bushing is provided on the inner wall of the connecting sleeve 1. The elastic clamping bushing is made of polyurethane material and can adapt to tripod legs of different diameters through its own elastic deformation. A locking bolt is also provided on the side wall of the connecting sleeve 1. After the legs are connected, tightening the locking bolt will secure them, greatly improving the adaptability and versatility of the mechanism for tripods of different specifications. At the same time, a rubber damping layer is pasted on the inner wall of the through groove on the locking plate 4. The locking damping force after the spherical locking block 10 is inserted into the through groove is stronger, which can effectively prevent the locking structure from accidentally disengaging due to vibration and bumps during outdoor carrying, improving the reliability of the storage state.

[0028] The unfolding and folding operation process of this embodiment is exactly the same as that of Embodiment 1. After unfolding, the bottom anti-slip rubber pad and the extended film with anti-slip texture together form a multi-area continuous anti-slip support surface, which can still provide a stable and reliable anti-slip support effect in complex working scenarios such as wet and slippery ground and gently sloping surfaces. At the same time, it can be adapted to tripod legs of various different diameters, making it more widely applicable. After folding, it also maintains a compact size, which does not affect the normal carrying and storage of the tripod.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A ground anti-slip support mechanism for a surveying instrument tripod, characterized in that, It includes a connecting sleeve (1), a retainer (6) and an extension frame (17). The retainer (6) is located below the connecting sleeve (1). There are two extension frames (17), and the two extension frames (17) are symmetrically arranged on both sides of the retainer (6). The bottom pin (2) of the connecting sleeve (1) is rotatably connected to the hinge frame (3), and the bottom of the hinge frame (3) is fixedly connected to the rotating shaft (5). The cage (6) has a stroke groove (11) inside. The other end of the rotating shaft (5) is rotatably connected to the cage (6). The first bevel gear (7) is fixedly sleeved at one end of the rotating shaft (5) extending into the stroke groove (11). The second bevel gear (9) is symmetrically arranged on both sides of the first bevel gear (7). The lead screw (8) is coaxially fixedly connected to the second bevel gear (9). The stroke slider (12) is threadedly sleeved on the rod wall of the two lead screws (8). The stroke slider (12) is slidably connected inside the stroke groove (11). The two ends of the stroke slider (12) are provided with hinge groove (13) and groove (14). The hinge groove (13) and groove (14) are staggered. The extension rod (15) is hinged inside the hinge groove (13) through the pin (16). The two extension rods (15) on the same side of the two stroke sliders (12) are staggered. The extension frame (17) has hinge blocks (18) fixedly connected to both ends of the side near the retainer (6). The hinge blocks (18) are hinged to the adjacent extension rod (15). The side of the extension frame (17) away from the retainer (6) has an installation groove (19). The inside of the installation groove (19) is wound with an extension film roll (22) by a rotating rod (21). The other end of the extension film roll (22) moves through the bottom of the extension frame (17) and is connected to the retainer (6).

2. The anti-slip support mechanism for a surveying instrument tripod according to claim 1, characterized in that: Locking plates (4) are fixedly connected to both sides of the hinge frame (3). A through slot is opened through the top of the locking plate (4). A spherical locking block (10) is fixedly embedded in the top of the retainer (6) at the position corresponding to the through slot. The locking block (10) is inserted into the inside of the through slot.

3. The anti-slip support mechanism for a surveying instrument tripod according to claim 1, characterized in that: A sealing block (20) is embedded in the outer wall of the extension frame (17) at the position corresponding to the mounting groove (19).

4. The anti-slip support mechanism for a surveying instrument tripod according to claim 1, characterized in that: The bottom of the retainer (6) has a slot, and a locking block (23) is inserted into the slot. The stretch film (22) extends through the retainer (6) into the slot and is locked by the locking block (23).

5. The anti-slip support mechanism for a surveying instrument tripod according to claim 1, characterized in that: Both ends of the rotating rod (21) are fitted with springs, and the two ends of the springs are fixed to the inner walls of the rotating rod (21) and the mounting groove (19), respectively.

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