Column foot leveling device

Abstract

The utility model discloses a column foot leveling device which comprises a screw assembly and a nut assembly. The nut assembly is installed on equipment needing to be leveled, the through groove is formed in the cylindrical wall of one end of the shaft sleeve in the nut assembly, the through groove is axially compressed, then thread gaps are eliminated, the screw assembly is in threaded fit with the nut assembly, and then leveled adjustment of the equipment is achieved. Compared with the prior art, the thread clearance eliminating structure is arranged, so that the thread clearance can be adjusted in time when the thread is abraded, and the thread adjusting precision is improved; a thread sealing structure is designed, the environmental adaptability of the device is improved, and the device can be used for field operation.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of measurement technology, especially in the design of geodetic instrument. BACKGROUND

[0002] The column foot leveling device is a device for realizing height lifting function through special design. In the prior art, a threaded screw rod mode is generally adopted to realize column foot leveling. This structure is simple, but this scheme does not eliminate the gap between threads, nor does it have sealing measures for threads.

[0003] The utility model adopts a variety of structure forms to realize the sealing of threads, the elimination of thread gaps, and adopts a design of anti-falling structure to avoid the separation of the leveling device. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims to provide a column foot leveling device which is used in geodetic instruments or devices that need to be adjusted horizontally, realizes height lifting adjustment, and realizes precise leveling of instruments and devices when multiple combined installations are installed on the device. The device has a thread gap elimination structure, can timely adjust the thread gap when the thread is worn, and improves the precision of thread adjustment. A thread sealing structure is designed to improve the environmental adaptability of the device and can be used for field operation.

[0005] The technical solution for realizing the utility model is as follows: a column foot leveling device includes a screw rod assembly and a nut assembly. The nut assembly is installed on a device that needs to be adjusted horizontally. A through slot is formed in the cylindrical wall of one end of the shaft sleeve in the nut assembly. The thread gap is eliminated by axially compressing the through slot. The screw rod assembly is threadedly connected with the nut assembly to realize the horizontal adjustment of the device.

[0006] The screw rod assembly includes a screw rod and a rotating wheel. The screw rod and the rotating wheel are fixedly connected.

[0007] The threads on the screw rod are divided into long threads and short threads. The long threads are connected with the shaft sleeve in the nut assembly to rotate the screw rod and realize the lifting of the device that needs to be adjusted horizontally.

[0008] The nut assembly includes a second screw, a shaft sleeve, and a mounting sleeve. The shaft sleeve and the mounting sleeve are connected and the gap is adjusted by the second screw.

[0009] The nut assembly further includes a limiting nut which is connected with the short threads on the screw rod to prevent the screw rod assembly from falling off the nut assembly.

[0010] The shaft sleeve is a multi-step structure. One end of the shaft sleeve is provided with threads for being connected with the threaded hole on the device that needs to be adjusted horizontally. The cylindrical wall of the other end of the shaft sleeve is provided with a slot in the circumferential direction. The slot is connected to the threads. The gap between the threads is eliminated by adjusting the second screw to compress the slot.

[0011] The shaft sleeve is divided into a through hole section and a threaded hole section; the through hole section is used for providing a placing space for the limiting nut; and the threaded hole section cooperates with the outer thread of the screw rod to form a threaded pair.

[0012] Compared with the prior art, the utility model has the following remarkable advantages:

[0013] (1) The column foot leveling device is characterized in that a through groove is formed in the cylindrical wall of one end of the shaft sleeve, thereby eliminating the thread gap and realizing close and continuous adjustment.

[0014] (2) The column foot leveling device is characterized in that the sealing ring is arranged, so that the thread is prevented from being corroded.

[0015] (3) The column foot leveling device is characterized in that the limiting nut is arranged, so that the nut and the screw rod are prevented from being separated. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model discloses a column foot leveling device's structure cross section view;

[0017] Figure 2 The utility model discloses a column foot leveling device's nut subassembly structure schematic view;

[0018] Figure 3 The utility model discloses a column foot leveling device's screw rod subassembly structure schematic view;

[0019] Figure 4 The utility model discloses a column foot leveling device's structure explosion map.

[0020] The utility model discloses a column foot leveling device's structure explosion map. DETAILED DESCRIPTION

[0021] The utility model will be further introduced below in combination with the drawings and specific embodiments. The technical scheme of the patent is further explained in combination with the drawings. The specific technology or condition not noted in the embodiment is carried out according to the technology or condition described in the literature in the field or according to the product manual.

[0022] As shown in Figure 1 The utility model discloses a column foot leveling device including screw rod subassembly 10, nut subassembly 9, nut subassembly 9 is installed on the equipment that needs to be adjusted level, realizes the lifting through the rotation screw rod subassembly 10, and then realizes the function of the horizontal adjustment of instrument equipment through the adjustment multiple column foot leveling devices installed on the equipment.

[0023] The screw rod assembly 10 comprises a screw rod 8, a rotating wheel 7 and a first screw 6;

[0024] The screw rod 8 and the rotating wheel 7 are fixedly connected through the first screw 6. The thread on the screw rod 8 is divided into long thread and short thread; the long thread is right-handed thread, which is matched with the shaft sleeve 3 in the nut assembly 9, so as to rotate the screw rod 8, change the axial distance between the shaft sleeve 3 and the screw rod 8, and then realize the lifting of the equipment which needs to be adjusted horizontally; the short thread at the head of the screw rod 8 is left-handed thread, which is matched with the limiting nut 1 in the nut assembly 9, so as to prevent the screw rod assembly 10 from falling off from the nut assembly 9 in the rotating process. The rotating wheel 7 is internally provided with a stepped through hole.

[0025] The nut assembly 9 comprises a limiting nut 1, a second screw 2, a shaft sleeve 3, an O-ring 4 and a mounting sleeve 5.

[0026] The shaft sleeve 3 is a multi-step structure, one end of the shaft sleeve 3 is provided with a thread, which is matched with a threaded hole on the equipment which needs to be adjusted horizontally; the other end of the shaft sleeve 3 is provided with three circumferential grooves on the cylindrical wall, and each groove occupies one third of the circumference.

[0027] The mounting sleeve 5 is mounted in the stepped hole in the rotating wheel 7, and the outer cylindrical surface (between the mounting sleeve 5 and the rotating wheel 7) is provided with the O-ring 4, which is used for sealing the internal thread and reducing the entry of external water vapor into the thread to reduce the corrosion of the thread. The end surface of the mounting sleeve 5 is provided with a threaded hole, which is matched with the second screw 2.

[0028] The first step surface of the shaft sleeve 3 is provided with a through hole, the second screw 2 passes through the through hole, and the second screw 2 is matched with the threaded hole on the mounting sleeve 5; the shaft sleeve 3 is divided into a through hole section and a threaded hole section; the through hole section is used to provide a space for the limiting nut 1; the threaded hole section is matched with the external thread of the screw rod 8 to form a threaded pair, the internal thread in the shaft sleeve 3 is divided into a grooved internal thread end and a non-grooved internal thread section, so as to adjust the gap between the shaft sleeve 3 and the mounting sleeve 5 by rotating the second screw 2, compress the grooves on the cylindrical wall of the shaft sleeve 3, eliminate the thread gap, prevent the thread from loosening, and realize precise adjustment.

[0029] The working process of the column foot leveling device is as follows: the nut assembly 9 and the screw rod assembly 10 are respectively assembled; the screw rod 8 in the screw rod assembly 10 is screwed into the shaft sleeve 3 of the nut assembly 9, the nut assembly 9 is installed on the equipment which needs to be adjusted horizontally, and then the screw rod 8 is rotated to realize the leveling of the equipment.

[0030] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments without departing from the principles and purposes of the present application within the scope of the present application.

Claims

1. A column foot levelling device, characterised in that, The screw rod assembly and the nut assembly are used for adjusting the level of the equipment.

2. The foot leveler of claim 1, wherein The screw rod assembly comprises a screw rod and a rotating wheel.

3. The foot leveler of claim 2, wherein, The screw rod comprises long thread and short thread.

4. The foot leveler of claim 3, wherein The nut assembly comprises a second screw, a shaft sleeve and a mounting sleeve.

5. The foot leveler of claim 4, wherein, The nut assembly further comprises a limiting nut.

6. The foot leveler of claim 4, wherein, The shaft sleeve is a multi-step structure.

7. The foot leveler of claim 5, wherein The shaft sleeve comprises a through hole section and a threaded hole section. The through hole section is used for providing a space for the limiting nut. The threaded hole section is used for cooperating with the outer thread of the screw rod to form a threaded pair.

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