A high-precision laser level

Abstract

The present invention relates to a high-precision laser level applied in the field of laser levels, comprising a base, an outer shell cover and a laser level body, a sealing structure is arranged between the base and the outer shell cover, the sealing structure comprises a first sealing ring, a second sealing ring and an oil seal unit, a pressure regulating device is installed at the side end of the outer shell cover, the first sealing ring and the second sealing ring cooperate with the oil seal unit as a double sealing structure, which can effectively prevent the infiltration of external dust and water vapor, and the sealing oil can adhere to a small amount of infiltrated dust, further avoiding the dust from infiltrating the inner side of the outer shell cover, better protecting the internal components of the laser level, thereby ensuring the measurement accuracy of the laser level; and during use, the pressure regulating device can be used to automatically adjust the internal and external air pressure difference of the outer shell cover, so that the internal and external air pressure difference of the outer shell cover is in a minimum state, thereby effectively reducing the influence of the internal and external air pressure difference of the outer shell cover on the measurement accuracy, and further improving the measurement accuracy of the laser level.

Description

Technical Field

[0001] The present invention relates to a laser level, and in particular to a high-precision laser level applied in the field of laser levels. Background Art

[0002] A laser level is an instrument that uses laser technology to measure the height difference of the ground or other horizontal surfaces. It uses the deflection of laser light after passing through the instrument to determine the height of the surface of an object. Because laser is a highly pure beam, its accuracy is very high, and it can achieve extremely small errors, providing very precise measurement data. With the development of technology, its measurement accuracy is still improving.

[0003] For example, the specification of patent application number CN 202122283890.X discloses a high-precision electronic laser level, comprising: a base and a level body clamped on the base; the base is composed of a rotating assembly and a clamping assembly installed on the top of the rotating assembly; wherein the rotating assembly includes a mounting seat, the top of the mounting seat is fixedly connected to a mounting shell, a rotating shaft is rotatably installed at the center of the bottom of the inner wall of the mounting shell through a ball bearing, and the top of the rotating shaft movably penetrates the mounting shell and extends to the top of the mounting shell, a driven wheel is fixedly connected to the rotating shaft inside the mounting shell, and a first mounting bracket and a second mounting bracket are fixedly connected to the top and bottom of the side of the mounting shell respectively. This high-precision electronic laser level is not only convenient for the installation of the laser level, but also convenient for adjusting the emission angle of the laser level during use, thereby greatly improving the practicality and accuracy of the laser level;

[0004] For another example, the specification of patent application number CN 202211235300.9 discloses a high-precision multifunctional laser level, comprising: a digital sensing platform, which is connected to a measuring part; the measuring part comprises a detection cavity, a fluid medium is arranged in the detection cavity, a light emitter is arranged on the top of the fluid medium, and a continuous thermoelectric material is arranged on the inner wall of the detection cavity above the fluid medium, the thermoelectric material is connected to a thermal pixel sensor, and both the thermal pixel sensor and the light emitter are connected to the digital sensing platform; the thermoelectric material is also connected to an angle adjustment device; it can not only perform leveling but also distance measurement, while reducing the influence of temperature and humidity during the measurement process, and has high measurement accuracy; it depicts angle changes by detecting the thermal imaging image caused by light to achieve precise measurement; it can monitor the angle changes of light through thermal imaging, thereby avoiding the influence of temperature changes on optical leveling.

[0005] However, based on the above search and combined with the prior art, it is found that the existing laser level has poor sealing, and external water vapor and dust can easily enter the instrument, causing interference with the measurement and reducing the measurement accuracy. It is also easy to damage the internal components of the instrument and shorten its service life. Therefore, a high-precision laser level is proposed to improve the above problems. Summary of the invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing laser level has poor sealing performance, and external water vapor and dust can easily enter the instrument, causing interference to the measurement and reducing the measurement accuracy. At the same time, it is also easy to damage the internal components of the instrument and shorten its service life.

[0007] In order to solve the above problems, the present invention provides a high-precision laser level, including a base, a housing cover and a laser level body installed at the top of the base, and a supporting foot installed at the bottom of the base:

[0008] A sealing structure is provided between the base and the outer shell, and the sealing structure comprises a first sealing ring, a second sealing ring and an oil sealing unit;

[0009] The first sealing ring and the second sealing ring are both fixed to the bottom end of the outer shell, and the first sealing ring is located outside the second sealing ring;

[0010] The upper end of the base is provided with an annular sealing groove for installing the oil seal unit, and the second sealing ring is adapted to the annular sealing groove, and the oil seal unit includes a flexible oil storage ring, a sealing pressure ring and a return spring;

[0011] The flexible oil storage ring is located at the inner bottom end of the annular sealing groove, the sealing pressure ring is located on the upper side of the flexible oil storage ring, and the sealing pressure ring is vertically slidably fitted on the inner wall of the annular sealing groove, and a plurality of return springs are provided, and the plurality of return springs are vertically fixed between the bottom end of the sealing pressure ring and the inner bottom end of the annular sealing groove;

[0012] The inner side of the flexible oil storage ring is soaked with sealing oil, and the sealing pressure ring is vertically provided with an oil hole;

[0013] A pressure regulating device is installed on the side end of the outer shell to keep the air pressure inside the outer shell consistent with the external air pressure.

[0014] In the above-mentioned high-precision laser level, the first sealing ring serves as the first sealing structure of the outer layer, which can effectively prevent the infiltration of external dust and water vapor. The second sealing ring cooperates with the oil seal unit as the second sealing structure of the inner layer. The sealing oil can be used to further improve the sealing between the base and the outer shell cover. The sealing oil can adhere to the small amount of dust that penetrates, preventing the dust from penetrating into the inner side of the outer shell cover, thereby better protecting the internal components of the laser level and ensuring the measurement accuracy of the laser level.

[0015] As a further supplement to the present application, an annular oil seal groove is provided on the upper end face of the sealing pressure ring, and the annular oil seal groove is connected to the oil hole; the annular oil seal groove can store the sealing oil, so that the sealing oil forms a seal with the second sealing ring.

[0016] As a further supplement to the present application, when the sealing pressure ring is not in contact with the second sealing ring, the lower end surface of the sealing pressure ring is not higher than the upper end surface of the base, thereby preventing the sealing pressure ring from being forced out of the annular oil seal groove.

[0017] As a further supplement to the present application, a plurality of oil holes are provided, and the plurality of oil holes are evenly arranged around the sealing pressure ring; when the sealing pressure ring is pressed down, the sealing oil can be evenly squeezed out.

[0018] As a further supplement to the present application, auxiliary oil return columns are arranged on the inner sides of the multiple oil holes, and the auxiliary oil return columns are integrated on the upper end surface of the flexible oil storage ring; the auxiliary oil return columns and the flexible oil storage ring both use a sponge-like oil storage material, and the auxiliary oil return columns can absorb the sealing oil in the annular oil seal groove to prevent the sealing oil from forming an oil film at the oil hole so that the sealing oil cannot flow back into the flexible oil storage ring.

[0019] As a further supplement to the present application, the upper and lower end surfaces of the flexible oil storage ring are respectively fixed to the bottom end of the sealing pressure ring and the inner bottom end of the annular sealing groove, and air bags are distributed in the flexible oil storage ring; the flexible oil storage ring can expand and contract with the reset spring, thereby achieving a stable oil absorption effect, and the set air bags can ensure that the sealing oil can form a complete sealing effect with the second sealing ring.

[0020] As a further supplement to the present application, the pressure regulating device includes a pressure regulating box body fixed on the outer wall of the outer shell, a second air pipe and a first air pipe respectively fixedly connected to the upper and lower ends of the pressure regulating box body, and a pressure regulating block slidably arranged on the inner side of the pressure regulating box body;

[0021] One end of the second air pipe away from the pressure regulating box body is fixed to the outer shell cover and connected to the inner side of the outer shell cover, and the circumference of the pressure regulating block slides and fits in the middle of the inner side of the pressure regulating box body; during the installation process of the outer shell cover and the base, the pressure regulating block is located in the middle of the inner side of the pressure regulating box body, and during use, the pressure regulating block can be used to automatically adjust the internal and external air pressure difference of the outer shell cover, so that the internal and external air pressure difference of the outer shell cover is in a minimum state, thereby effectively reducing the influence of the internal and external air pressure difference of the outer shell cover on the measurement accuracy.

[0022] As a further supplement to the present application, the pressure regulating block is made of lightweight material to reduce the influence of the pressure regulating block's own gravity on the pressure difference inside and outside the outer shell cover. A filter cover is removably installed on the outside of the first air pipe, which can prevent external dust and other debris from entering the inside of the pressure regulating box.

[0023] As a further supplement to the present application, a drying device is installed on the inner wall of the pressure regulating box body close to the first air pipe; the drying device can adsorb water vapor carried in the air there to prevent water vapor from adhering to the inner wall of the pressure regulating box body and causing difficulty in moving the pressure regulating block.

[0024] As a further supplement to the present application, a transparent window is integrated at the side end of the voltage regulating box body, and the color of the voltage regulating block is different from the color of the outer shell cover and the voltage regulating box body; the operator can observe the position of the voltage regulating block through the transparent window.

[0025] In summary, after the outer shell cover and the base are assembled, the first sealing ring serves as the first outer sealing structure, which can effectively prevent the infiltration of external dust and water vapor. The second sealing ring cooperates with the oil seal unit as the second inner sealing structure. The sealing oil can be used to further improve the sealing between the base and the outer shell cover, and the sealing oil can adhere to the small amount of dust that penetrates, preventing the dust from penetrating into the inner side of the outer shell cover, thereby better protecting the internal components of the laser level and ensuring the measurement accuracy of the laser level. During use, the pressure regulating block can be used to automatically adjust the internal and external air pressure difference of the outer shell cover, so that the internal and external air pressure difference of the outer shell cover is at the minimum state, thereby effectively reducing the influence of the internal and external air pressure difference of the outer shell cover on the measurement accuracy, thereby further improving the measurement accuracy of the laser level. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall appearance of the first embodiment of the present application;

[0027] Figure 2 This is a schematic diagram of the bottom three-dimensional structure of the outer shell cover of the first embodiment of the present application;

[0028] Figure 3 This is a schematic diagram of the three-dimensional structure of the base of the first embodiment of the present application;

[0029] Figure 4 This is a schematic diagram of the disassembled three-dimensional structure of the oil seal unit according to the first embodiment of the present application;

[0030] Figure 5 for Figure 4 A schematic diagram of the enlarged structure at A in the middle;

[0031] Figure 6 This is a partial structural schematic diagram of the second implementation mode of the present application;

[0032] Figure 7 This is a demonstration diagram of a state in which the external air pressure of the outer shell cover is greater than the internal air pressure of the outer shell cover according to the second embodiment of the present application;

[0033] Figure 8 This is a demonstration diagram of the state in which the external air pressure of the outer shell cover is lower than the internal air pressure of the outer shell cover according to the second embodiment of the present application.

[0034] Description of the numbers in the figure:

[0035] 1. Base; 101. Annular sealing groove; 2. Outer shell cover; 3. Support foot; 4. First sealing ring; 5. Second sealing ring; 6. Oil seal unit; 61. Flexible oil storage ring; 62. Sealing pressure ring; 6201. Annular oil seal groove; 6202. Oil hole; 63. Reset spring; 64. Auxiliary oil return column; 7. Pressure regulating device; 71. Pressure regulating box; 72. First air pipe; 73. Second air pipe; 74. Pressure regulating block; 75. Filter cover; 76. Drying device. DETAILED DESCRIPTION

[0036] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0037] The first implementation method:

[0038] The present invention provides a high-precision laser level. Figure 1-5 , including a base 1, an outer shell cover 2 and a laser level body installed on the top of the base 1, and a supporting foot 3 installed on the bottom of the base 1.

[0039] A sealing structure is provided between the base 1 and the outer shell 2, and the sealing structure includes a first sealing ring 4, a second sealing ring 5 and an oil seal unit 6. The first sealing ring 4 and the second sealing ring 5 are both fixed to the bottom end of the outer shell 2, and the first sealing ring 4 is located on the outside of the second sealing ring 5. An annular sealing groove 101 for installing the oil seal unit 6 is provided at the upper end of the base 1, and the second sealing ring 5 is adapted to the annular sealing groove 101. The oil seal unit 6 includes a flexible oil storage ring 61, a sealing pressure ring 62 and a reset ring 64. Spring 63, the flexible oil storage ring 61 is located at the inner bottom end of the annular sealing groove 101, the sealing pressure ring 62 is located on the upper side of the flexible oil storage ring 61, and the sealing pressure ring 62 is vertically slidably fitted on the inner wall of the annular sealing groove 101, a plurality of return springs 63 are provided, and a plurality of return springs 63 are vertically fixed between the bottom end of the sealing pressure ring 62 and the inner bottom end of the annular sealing groove 101, the inner side of the flexible oil storage ring 61 is immersed in sealing oil, and an oil hole 6202 is vertically provided on the sealing pressure ring 62.

[0040] Based on the matching arrangement of the above structure, after the outer shell cover 2 and the base 1 are assembled, the first sealing ring 4 serves as the first outer sealing structure, which can effectively prevent the infiltration of external dust and water vapor. The second sealing ring 5 cooperates with the oil seal unit 6 as the second inner sealing structure. The sealing oil can be used to further improve the sealing between the base 1 and the outer shell cover 2, and the sealing oil can adhere to the small amount of dust that penetrates, thereby preventing the dust from penetrating into the inner side of the outer shell cover 2, thereby better protecting the internal components of the laser level, thereby ensuring the measurement accuracy of the laser level.

[0041] It should be further explained that the sealing oil forms an oil film at the second sealing ring 5 to achieve oil sealing. In combination with the viscosity of the sealing oil, the amount of the sealing oil is set so as not to overflow the annular sealing groove 101 .

[0042] Among them, Figure 4 As shown, the upper end surface of the sealing pressure ring 62 is provided with an annular oil seal groove 6201, and the annular oil seal groove 6201 is connected with the oil hole 6202; the annular oil seal groove 6201 can store the sealing oil, so that the sealing oil forms a seal with the second sealing ring 5.

[0043] When the sealing pressure ring 62 is not in contact with the second sealing ring 5 , the lower end surface of the sealing pressure ring 62 is not higher than the upper end surface of the base 1 , so as to prevent the sealing pressure ring 62 from being forced out of the annular oil seal groove 6201 .

[0044] There are multiple oil holes 6202, and the multiple oil holes 6202 are evenly arranged around the sealing pressure ring 62; when the sealing pressure ring 62 is pressed down, the sealing oil can be squeezed out evenly.

[0045] Among them, Figure 4 and Figure 5 It is shown that an auxiliary oil return column 64 is arranged on the inner side of the multiple oil holes 6202, and the auxiliary oil return column 64 is integrated on the upper end surface of the flexible oil storage ring 61; the auxiliary oil return column 64 and the flexible oil storage ring 61 both use an oil storage material similar to a sponge, and the auxiliary oil return column 64 can absorb the sealing oil in the annular oil seal groove 6201 to prevent the sealing oil from forming an oil film at the oil hole 6202 so that the sealing oil cannot flow back to the flexible oil storage ring 61.

[0046] As a further limitation, the upper and lower end surfaces of the flexible oil storage ring 61 are respectively fixed to the bottom end of the sealing pressure ring 62 and the inner bottom end of the annular sealing groove 101, and air bags are distributed in the flexible oil storage ring 61; the flexible oil storage ring 61 can expand and contract with the reset spring 63, thereby achieving a stable oil absorption effect, and the set air bags can ensure that the sealing oil can form a complete sealing effect with the second sealing ring 5.

[0047] Second implementation method:

[0048] On the basis of Embodiment 1, this embodiment adds the following structure, so that the present application has the function of automatically adjusting the internal air pressure of the outer shell cover 2, and the specific configuration is as follows: a pressure regulating device 7 is installed at the side end of the outer shell cover 2 to keep the air pressure inside the outer shell cover 2 consistent with the external air pressure; about the pressure regulating device 7, specifically, as Figure 6-8As shown, the pressure regulating device 7 includes a pressure regulating box body 71 fixed on the outer wall of the outer shell cover 2, a second air pipe 73 and a first air pipe 72 respectively fixedly connected to the upper and lower ends of the pressure regulating box body 71, and a pressure regulating block 74 slidably arranged on the inner side of the pressure regulating box body 71. The end of the second air pipe 73 away from the pressure regulating box body 71 is fixed to the outer shell cover 2 and connected to the inner side of the outer shell cover 2. The circumference of the pressure regulating block 74 slides and fits in the middle of the inner side of the pressure regulating box body 71. During the installation process of the outer shell cover 2 and the base 1, the pressure regulating block 74 is located in the middle of the inner side of the pressure regulating box body 71. During use, the pressure regulating block 74 can be used to automatically adjust the internal and external air pressure difference of the outer shell cover 2 (such as Figure 7 and Figure 8 As shown, the air pressure inside the outer shell 2 is Pa1, and the air pressure outside the outer shell 2 is Pa2. Figure 7 In the embodiment, the external air pressure Pa2 of the outer shell 2 is greater than the internal air pressure Pa1 of the outer shell 2. At this time, the external air pressure Pa2 of the outer shell 2 pushes the pressure regulating block 74 to move upward so that Pa1 and Pa2 tend to be consistent; Figure 8 In the embodiment, the external air pressure Pa2 of the outer shell cover 2 is less than the internal air pressure Pa1 of the outer shell cover 2. At this time, the internal air pressure Pa1 of the outer shell cover 2 pushes the pressure regulating block 74 to move downward to make Pa1 and Pa2 tend to be consistent) so that the internal and external air pressure difference of the outer shell cover 2 is in the minimum state, thereby effectively reducing the influence of the internal and external air pressure difference of the outer shell cover 2 on the measurement accuracy.

[0049] Among them, the pressure regulating block 74 is made of lightweight material to reduce the influence of its own gravity on the pressure difference between the inside and outside of the outer shell cover 2. A filter cover 75 is detachably installed on the outside of the first air pipe 72 to prevent external dust and other debris from entering the inside of the pressure regulating box 71.

[0050] Among them, Figure 6 As shown, a drying device 76 is installed on the inner wall of the pressure regulating box 71 close to the first air pipe 72; the drying device 76 can absorb the water vapor carried in the air there to prevent the water vapor from adhering to the inner wall of the pressure regulating box 71 and causing difficulty in moving the pressure regulating block 74.

[0051] A transparent window is integrated at the side end of the voltage regulating box 71 , and the color of the voltage regulating block 74 is different from the colors of the outer shell cover 2 and the voltage regulating box 71 ; the operator can observe the position of the voltage regulating block 74 through the transparent window.

[0052] Compared with the prior art, in this solution, after the outer shell 2 and the base 1 are assembled, the first sealing ring 4 is used as the first outer sealing structure to effectively prevent the infiltration of external dust and water vapor. The second sealing ring 5 cooperates with the oil seal unit 6 as the second inner sealing structure. The sealing oil can be used to further improve the sealing between the base 1 and the outer shell 2. The sealing oil can adhere to a small amount of infiltrated dust to prevent the dust from infiltrating the inner side of the outer shell 2, better protect the internal components of the laser level, and thus ensure the measurement accuracy of the laser level.

[0053] Compared with the prior art, in the present solution, by installing a pressure regulating device 7 on the side end of the outer shell cover 2, the pressure regulating block 74 can be used to automatically adjust the internal and external air pressure difference of the outer shell cover 2 during use, so that the internal and external air pressure difference of the outer shell cover 2 is in a minimum state, thereby effectively reducing the influence of the internal and external air pressure difference of the outer shell cover 2 on the measurement accuracy, and further improving the measurement accuracy of the laser level.

[0054] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A high-precision laser level, comprising a base (1), a housing cover (2) mounted on the top of the base (1) and a laser level body, and a support foot (3) mounted on the bottom of the base (1), characterized in that: A sealing structure is provided between the base (1) and the outer shell cover (2), the sealing structure comprising a first sealing ring (4), a second sealing ring (5) and an oil sealing unit (6); The first sealing ring (4) and the second sealing ring (5) are both fixed to the bottom end of the outer shell cover (2), and the first sealing ring (4) is located outside the second sealing ring (5); An annular sealing groove (101) for mounting the oil seal unit (6) is provided at the upper end of the base (1); the second sealing ring (5) is adapted to fit the annular sealing groove (101); and the oil seal unit (6) comprises a flexible oil storage ring (61), a sealing pressure ring (62) and a return spring (63); The flexible oil storage ring (61) is located at the inner bottom end of the annular sealing groove (101), the sealing pressure ring (62) is located on the upper side of the flexible oil storage ring (61), and the sealing pressure ring (62) is arranged to slide vertically and fit the inner wall of the annular sealing groove (101), a plurality of return springs (63) are provided, and the plurality of return springs (63) are vertically fixed between the bottom end of the sealing pressure ring (62) and the inner bottom end of the annular sealing groove (101); The inner side of the flexible oil storage ring (61) is soaked in sealing oil, and the sealing pressure ring (62) is vertically provided with an oil hole (6202); A pressure regulating device (7) is installed at the side end of the outer shell (2) to keep the air pressure inside the outer shell (2) consistent with the external air pressure; An annular oil seal groove (6201) is provided on the upper end surface of the sealing pressure ring (62), and the annular oil seal groove (6201) is connected to the oil hole (6202); When the sealing pressure ring (62) is not in contact with the second sealing ring (5), the lower end surface of the sealing pressure ring (62) is not higher than the upper end surface of the base (1); A plurality of the oil holes (6202) are provided, and the plurality of the oil holes (6202) are evenly arranged around the sealing pressure ring (62); An auxiliary oil return column (64) is arranged inside the plurality of oil holes (6202), and the auxiliary oil return column (64) is integrally arranged on the upper end surface of the flexible oil storage ring (61); The upper and lower end surfaces of the flexible oil storage ring (61) are respectively fixed to the bottom end of the sealing pressure ring (62) and the inner bottom end of the annular sealing groove (101), and air bags are distributed in the flexible oil storage ring (61).

2. A high-precision laser level according to claim 1, characterized in that: The pressure regulating device (7) comprises a pressure regulating box (71) fixed on the outer wall of the outer shell (2), a second air pipe (73) and a first air pipe (72) respectively fixedly connected to the upper and lower ends of the pressure regulating box (71), and a pressure regulating block (74) slidably arranged on the inner side of the pressure regulating box (71); One end of the second air pipe (73) away from the pressure regulating box (71) is fixed to the outer shell cover (2) and communicates with the inner side of the outer shell cover (2). The circumference of the pressure regulating block (74) is slidably fitted to the inner middle part of the pressure regulating box (71).

3. A high-precision laser level according to claim 2, characterized in that: The pressure regulating block (74) is made of a lightweight material, and a filter cover (75) is detachably mounted on the outer side of the first air pipe (72).

4. A high-precision laser level according to claim 2, characterized in that: A drying device (76) is installed on the inner wall of the pressure regulating box (71) at one side close to the first air pipe (72).

5. A high-precision laser level according to claim 2, characterized in that: A transparent window is integrally provided at the side end of the voltage regulating box (71), and the color of the voltage regulating block (74) is different from the color of the outer shell cover (2) and the voltage regulating box (71).

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