Horizontal marking device for real estate surveying and mapping

By designing a horizontal marking device for surveying and mapping including mounting base, finite position assembly and height adjustment assembly, the laser emitter and mutually coordinated mechanical structure are used to solve the problem of low efficiency and accuracy of artificial elastic lines in the prior art. , achieving more efficient and more accurate horizontal marking.

CN222353195UActive Publication Date: 2025-01-14DONGYING XINGDA SURVEYING & MAPPING TECH CO LTD
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Patent Information

Application Number
CN202421266097.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-04
Publication Date
2025-01-14
Estimated Expiration
2034-06-04

AI Technical Summary

Technical Problem

The existing horizontal marking device for surveying and mapping is carried out by manual elastic lines, resulting in low working efficiency and accuracy.

Method used

A horizontal marking device for real estate surveying and mapping was designed, including installation base, limiting component, height adjustment component and protective shell. Through threaded rods, vertical plates, T-shaped rods, hinged rods, etc., the limiting base plates and protection are driven. The plate moves, horizontal marking is achieved using laser emitters, and height adjustment is achieved through bevel gears and threaded sleeves.

Benefits of technology

Improves the accuracy of the marking and the stability and flexibility of the device, reducing the risk of damage to the laser emitter.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a horizontal marking device for real estate surveying and mapping, which relates to the technical field of real estate surveying and mapping and comprises a mounting base, and the upper end of the mounting base is fixedly connected with a limiting component and a height adjusting component. Through the mutual cooperation of the first threaded rod, the vertical plate, the T-shaped rod, the first fixing rod and the hinge rod, the limiting bottom plate can be driven to move downwards until the lower end of the limiting bottom plate makes contact with the ground, and at the moment, the stability of the device in the using process can be improved; in the process of driving the limiting bottom plate to move downwards, two worms can be driven to rotate under the action of an arranged vertical plate, an L-shaped toothed plate and a gear, and two L-shaped protection plates can be driven to be far away from each other through rotation of the two worms under the action of an arranged worm gear, a rotating shaft II, a cam, a spring, a T-shaped limiting rod and a limiting plate; at the moment, the two L-shaped protection plates do not have a blocking effect on the laser transmitter.
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Description

Technical Field

[0001] The utility model relates to a horizontal marking device for surveying and mapping, in particular to a horizontal marking device for real estate surveying and mapping. Background Art

[0002] Real estate surveying and mapping is cadastral surveying and mapping. Cadastral surveying and mapping mainly include cadastral control surveying, boundary point surveying and cadastral map surveying. Its technology and methods are basically the same as the control surveying and topographic map surveying in engineering surveying. When conducting real estate surveying and mapping, horizontal marking is often required to facilitate subsequent surveying and mapping.

[0003] At present, there are still some defects and deficiencies in the use of horizontal marking devices for surveying and mapping. The specific areas that need to be improved are as follows:

[0004] Most of the existing horizontal markings are done by manual marking, which not only has low work efficiency but also low marking accuracy. Utility Model Content

[0005] The utility model aims to provide a horizontal marking device for real estate surveying and mapping, so as to solve the problem that the existing horizontal marking is mostly carried out by manual marking, which not only has low work efficiency but also low marking accuracy.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a horizontal marking device for real estate surveying and mapping, comprising a mounting base, the upper end of the mounting base is fixedly connected to a limiting assembly and a height adjustment assembly, the upper end of the height adjustment assembly is fixedly connected to the lower end of the mounting plate, the upper end of the mounting plate is fixedly connected to a protective shell, the front end of the protective shell is overlapped with two L-shaped protective plates, the rear ends of the two L-shaped protective plates are fixedly connected to two limiting plates, the four limiting plates are respectively movably connected to four T-shaped limiting rods, the relatively remote ends of the two L-shaped protective plates are overlapped with a pushing assembly, the relatively close ends of the two pushing assemblies are respectively fixedly connected to the left and right ends of the mounting plate, the lower ends of the two pushing assemblies are respectively meshed with two L-shaped tooth plates for transmission, the lower ends of the two L-shaped tooth plates are fixedly connected to the upper end of the limiting assembly, the lower end of the limiting assembly passes through two through grooves opened in the mounting base and is arranged on the lower side of the mounting base, and the front and rear sides of the limiting assembly are fixedly connected with T-shaped rods.

[0007] As a preferred technical solution of the utility model, two movable wheels are provided on the front and rear sides of the lower surface of the mounting base, and the mounting base is movably connected to two T-shaped rods through two circular holes opened inside thereof, and the four T-shaped limit rods are grouped in pairs and their relatively close ends are fixedly connected to the left and right ends of the protective shell respectively.

[0008] As a preferred technical solution of the utility model, springs are sleeved on the four T-shaped limit rods, the four springs are grouped in pairs and their relatively distant ends are fixedly connected to the four T-shaped limit rods, and the four springs are grouped in pairs and their relatively close ends are fixedly connected to the four limit plates, a laser emitter is arranged inside the protective shell, and the lower end of the laser emitter is fixedly mounted on the upper end of the mounting plate.

[0009] The lockhole that is formed on the two ends of two camshafts is formed on the two ends of two camshafts, and the two ends of two camshafts are connected with the lockhole that is formed on the two ends of two camshafts.

[0010] As an optimal technical scheme of the utility model, the height adjustment assembly includes a support frame, the lower end of the support frame is fixedly connected to the upper end of the mounting base, the support frame is movably connected to a threaded sleeve through a connecting hole opened in the upper end thereof, the threaded sleeve is threadedly connected to a threaded rod two, the lower end of the threaded rod two is fixedly connected to the upper end of the connecting plate, the left and right sides of the upper surface of the connecting plate are fixedly connected to a fixing rod two, the two fixing rods two are movably connected to the support frame with two circular holes opened in the upper end, the upper ends of the two fixing rods two and the threaded rod two are fixedly connected to the lower end of the mounting plate, the threaded sleeve is fixedly connected to a bevel gear one, the bevel gear one is meshed with the bevel gear two for transmission, the bevel gear two is fixedly connected to the front end of the rotating shaft one, the rotating shaft one is movably connected to an L-shaped plate one, and the front end of the L-shaped plate one is fixedly connected to the rear end of the support frame.

[0011] As a preferred technical solution of the utility model, the two pushing components both include gears, the two gears are respectively meshed with two L-shaped tooth plates for transmission, the two gears are respectively fixedly connected to the lower ends of the two worms, the two worms are respectively meshed with two worm wheels for transmission, the two worm wheels are respectively fixedly connected to the rear ends of the two rotating shafts two, and the front ends of the two rotating shafts two are fixedly connected with cams.

[0012] As a preferred technical solution of the utility model, the relatively close ends of the two cams are overlapped with the relatively distant ends of the two L-shaped protective plates respectively, the two rotating shafts are movably connected with L-shaped plates two, the relatively close ends of the two L-shaped plates two are respectively fixedly connected to the left and right ends of the mounting plate, the two worm gears are movably connected with support plates at the upper side light rod positions, and the relatively close ends of the two support plates are respectively fixedly connected to the left and right ends of the mounting plate.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model can drive the limit bottom plate to move downward through the mutual cooperation among the arranged threaded rod 1, the vertical plate, the T-shaped rod, the fixed rod 1 and the hinged rod until the lower end of the limit bottom plate contacts the ground, at which time the stability of the device during use can be increased, and in the process of driving the limit bottom plate to move downward, the arranged vertical plate, the L-shaped toothed plate and the gear can drive the two worms to rotate, and through the rotation of the two worms, the arranged worm wheel, the rotating shaft 2, the cam, the spring, the T-shaped limit rod and the limit plate can drive the two L-shaped protective plates to move away from each other, and at this time the two L-shaped protective plates no longer have an impact on the laser transmitter The device has a blocking effect, and then horizontal marking can be performed under the action of the light emitted by the laser transmitter, which greatly improves the accuracy of the marking of the device. The cooperation between the rotating shaft one, bevel gear one, bevel gear two, fixing rod two, threaded sleeve, connecting plate and supporting frame can drive the mounting plate to move upward during the use of the device, and then the height adjustment process of the laser transmitter can be realized, which increases the flexibility of the device during use. The cooperation between the L-shaped protective plate and the protective shell can protect the laser transmitter, which greatly reduces the possibility of the laser transmitter being damaged by collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main three-dimensional structure of the utility model;

[0016] Figure 2 It is a left-side stereoscopic structural schematic diagram of the utility model;

[0017] Figure 3 It is a right-side sectional three-dimensional structural schematic diagram of the protective shell of the utility model;

[0018] Figure 4 It is a right-side perspective structural diagram of the height adjustment assembly of the utility model;

[0019] Figure 5 It is a right-side perspective structural diagram of the driving component of the utility model;

[0020] Figure 6This is a schematic diagram of the main three-dimensional structure of the components of the present utility model.

[0021] In the figure: 1 mounting base, 2 moving wheel, 3 current component, 31 limiting bottom plate, 32 hinged rod, 33 concave fixed plate, 34 threaded rod 1, 35 vertical plate, 36 fixed rod 1, 4 T-shaped rod, 5 height adjustment component, 51 connecting plate, 52 fixed rod 2, 53 threaded rod 2, 54 support frame, 55 L-shaped plate 1, 56 bevel gear 1, 57 rotating shaft 1, 58 threaded sleeve, 59 bevel gear 2, 6 L-shaped tooth plate, 7 mounting plate, 8 pushing component, 81 support plate, 82 L-shaped plate 2, 83 gear, 84 worm, 85 cam, 86 worm wheel, 87 rotating shaft 2, 9 L-shaped protective plate, 10 limiting plate, 11 spring, 12 T-shaped limiting rod, 13 protective shell, 14 laser emitter. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-6As shown, the utility model provides a technical solution: a horizontal marking device for real estate surveying and mapping, including a mounting base 1, the upper end of the mounting base 1 is fixedly connected to a limit assembly 3 and a height adjustment assembly 5, the upper end of the height adjustment assembly 5 is fixedly connected to the lower end of a mounting plate 7, the upper end of the mounting plate 7 is fixedly connected to a protective shell 13, the front end of the protective shell 13 is overlapped with two L-shaped protective plates 9, the rear ends of the two L-shaped protective plates 9 are fixedly connected to two limit plates 10, the four limit plates 10 are respectively movably connected to four T-shaped limit rods 12, the relatively far ends of the two L-shaped protective plates 9 are overlapped with a push assembly 8, and the relatively close ends of the two push assemblies 8 are respectively fixedly connected to the mounting plate The left and right ends of 7, the lower ends of the two pushing components 8 are respectively meshed with the two L-shaped tooth plates 6 for transmission, the lower ends of the two L-shaped tooth plates 6 are fixedly connected to the upper end of the limiting component 3, the lower end of the limiting component 3 passes through the two through grooves opened inside the mounting base 1 and is arranged on the lower side of the mounting base 1, and the mutual cooperation between the protective shell 13 and the L-shaped protective plate 9 can protect the laser emitter 14, and the setting of the limiting component 3 can limit the movement of the device during the use of the device, thereby increasing the stability of the device during the use of the device, and in the process of limiting the movement of the device, the setting of the limiting component 3 can drive the two L-shaped teeth The plates 6 move away from each other, and then the two L-shaped protective plates 9 can be driven to move away from each other under the action of the two pushing components 8, the spring 11, the limit plate 10 and the T-shaped limit rod 12. At this time, the laser emitter 14 can be exposed from the inside of the protective shell 13 for use. The front and rear sides of the limit component 3 are fixedly connected with T-shaped rods 4. Two moving wheels 2 are arranged on the front and rear sides of the lower surface of the mounting base 1. The mounting base 1 is movably connected to the two T-shaped rods 4 through two circular holes opened inside it. The four T-shaped limit rods 12 are grouped in pairs, and their relatively close ends are fixedly connected to the left and right ends of the protective shell 13 respectively. The four T-shaped limit rods 12 are sleeved with springs 11 A laser emitter 14 is arranged inside the protective shell 13, and the lower end of the laser emitter 14 is fixedly mounted on the upper end of the mounting plate 7. The height adjustment component 5 can drive the mounting plate 7 to move in the up and down directions during the use of the device, so that the device can adjust the height of the laser emitter 14 as needed. The light emitted by the laser emitter 14 can greatly improve the accuracy of the marking line of the device. The T-shaped rod 4 can limit the movement direction of the limit assembly 3. The cooperation between the limit plate 10 and the T-shaped limit rod 12 can limit the movement direction of the L-shaped protective plate 9.

[0024] The limiting assembly 3 includes two concave fixing plates 33, the lower ends of the two concave fixing plates 33 are fixedly connected to the upper end of the mounting base 1, the two concave fixing plates 33 are movably connected to the left and right side bare rod parts of the threaded rod 1 34 through the connecting holes opened inside them, the threaded rod 1 34 is threadedly connected to two vertical plates 35 with threaded holes opened inside, the upper ends of the two vertical plates 35 are respectively fixedly connected to the lower ends of the two L-shaped toothed plates 6, the lower ends of the two vertical plates 35 are movably connected with hinged rods 32, the lower ends of the two hinged rods 32 respectively pass through the two through grooves opened inside the mounting base 1 and are movably connected to the upper end of the limiting bottom plate 31, the front and rear sides of the upper surface of the limiting bottom plate 31 are respectively connected to the lower ends of the two T-shaped rods 4 The two ends are fixedly connected, and the two vertical plates 35 are movably connected to the fixing rod 36 through the circular holes opened therein. The left and right ends of the fixing rod 36 are respectively fixedly connected to the relatively close ends of the two concave fixing plates 33. The two vertical plates 35 are driven to move away from each other by rotating the threaded rod 34, and then the limiting bottom plate 31 can be driven to move downward under the action of the set hinge rod 32 until the lower end of the limiting bottom plate 31 contacts the ground. When the lower end of the limiting bottom plate 31 contacts the ground, the two L-shaped toothed plates 6 no longer mesh with the lower ends of the two pushing assemblies 8. The mutual cooperation of the set concave fixing plate 33 and the fixing rod 36 can limit the movement direction of the vertical plate 35.

[0025] The height adjustment assembly 5 includes a support frame 54, the lower end of the support frame 54 is fixedly connected to the upper end of the mounting base 1, the support frame 54 is movably connected to the threaded sleeve 58 through the connecting hole opened inside the upper end thereof, the threaded sleeve 58 is threadedly connected to the threaded rod 2 53, the lower end of the threaded rod 2 53 is fixedly connected to the upper end of the connecting plate 51, the left and right sides of the upper surface of the connecting plate 51 are fixedly connected to the fixing rod 2 52, the two fixing rods 2 52 are movably connected to the support frame 54 with two circular holes opened inside the upper end, the upper ends of the two fixing rods 2 52 and the threaded rod 2 53 are fixedly connected to the lower end of the mounting plate 7, the threaded sleeve 58 is fixedly connected to the bevel gear 1 56, the bevel gear 1 56 is meshed with the bevel gear 2 59 for transmission , bevel gear 2 59 is fixedly connected to the front end of rotating shaft 1 57, and an L-shaped plate 1 55 is movably connected to rotating shaft 1 57. The front end of L-shaped plate 1 55 is fixedly connected to the rear end of support frame 54. By rotating rotating shaft 1 57, bevel gear 2 59 is driven to rotate, and then under the action of the set bevel gear 1 56, the threaded sleeve 58 can be driven to rotate. Through the rotation of the threaded sleeve 58, under the action of the set threaded rod 2 53, the effect of driving the mounting plate 7 to move upward can be achieved. The mutual cooperation between the set connecting plate 51, support frame 54 and fixed rod 2 52 can increase the stability of the mounting plate 7 during the movement process, and the set L-shaped plate 1 55 can support the rotating shaft 1 57.

[0026] The two pushing components 8 each include a gear 83, the two gears 83 are respectively meshed with the two L-shaped toothed plates 6 for transmission, the two gears 83 are respectively fixedly connected to the lower ends of the two worms 84, the two worms 84 are respectively meshed with the two worm wheels 86 for transmission, the two worm wheels 86 are respectively fixedly connected to the rear ends of the two rotating shafts 87, the front ends of the two rotating shafts 87 are both fixedly connected with cams 85, the relatively close ends of the two cams 85 are respectively overlapped with the relatively far ends of the two L-shaped protective plates 9, the two rotating shafts 87 are both movably connected with L-shaped plates 82, the relatively close ends of the two L-shaped plates 82 are respectively connected to the mounting plate The left and right ends of 7 are fixedly connected, and the upper side light rod positions of the two worm gears 87 are movably connected with support plates 81. The relatively close ends of the two support plates 81 are respectively fixedly connected to the left and right ends of the mounting plate 7. In the process of driving the two L-shaped toothed plates 6 away from each other, the two worm gears 84 can be driven to rotate under the action of the two set gears 83. Through the rotation of the two worm gears 84, under the action of the set worm wheel 86, the second shaft 87, the cam 85 and the spring 11, the two L-shaped protective plates 9 can be moved away from each other to a certain distance. At this time, the gear 83 and the corresponding L-shaped toothed plate 6 are no longer in meshing.

[0027] The operating steps of the utility model are:

[0028] When the device is used for horizontal marking, the device is placed in a suitable position, and then the threaded rod 1 34 is rotated to drive the two vertical plates 35 to move away from each other, and then the limiting bottom plate 31 can be driven to move downward under the action of the provided hinged rod 32 until the lower end of the limiting bottom plate 31 contacts the ground, thereby increasing the stability of the device during use. In the process of driving the two vertical plates 35 to move away from each other, the two worms 84 can be driven to rotate under the action of the provided L-shaped toothed plate 6 and the gear 83, and the rotation of the two worms 84 is controlled by the provided worm wheel 86, the rotating shaft 2 87, the cam 85 and the spring 11. The two L-shaped protective plates 9 can be driven to move away from each other. At this time, the two L-shaped protective plates 9 no longer block the laser emitter 14, and the two gears 83 no longer mesh with the two L-shaped toothed plates 6. Then, the light emitted by the laser emitter 14 can be used for horizontal marking. During the marking process, the bevel gear 2 59 is driven to rotate by rotating the rotating shaft 1 57. Then, the mounting plate 7 can be driven to move upward with the cooperation of the bevel gear 1 56, the threaded sleeve 58, the threaded rod 2 53, the connecting plate 51 and the fixing rod 2 52, thereby realizing the height adjustment process of the laser emitter 14.

[0029] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0031] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A horizontal marking device for real estate surveying and mapping, comprising a mounting base (1), characterized in that: The upper end of the mounting base (1) is fixedly connected to a limit assembly (3) and a height adjustment assembly (5); the upper end of the height adjustment assembly (5) is fixedly connected to the lower end of the mounting plate (7); the upper end of the mounting plate (7) is fixedly connected to a protective shell (13); the front end of the protective shell (13) is overlapped with two L-shaped protective plates (9); the rear ends of the two L-shaped protective plates (9) are fixedly connected to two limit plates (10); the four limit plates (10) are respectively movably connected to four T-shaped limit rods (12); the two L-shaped protective plates (9) are The relatively far ends of the two pushing assemblies (8) are overlapped with a pushing assembly (8), the relatively close ends of the two pushing assemblies (8) are respectively fixedly connected to the left and right ends of the mounting plate (7), the lower ends of the two pushing assemblies (8) are respectively meshed with two L-shaped tooth plates (6) for transmission, the lower ends of the two L-shaped tooth plates (6) are fixedly connected to the upper end of the limiting assembly (3), the lower end of the limiting assembly (3) passes through two through grooves opened inside the mounting base (1) and is arranged on the lower side of the mounting base (1), and the front and rear sides of the limiting assembly (3) are fixedly connected with T-shaped rods (4).

2. The horizontal marking device for real estate surveying and mapping according to claim 1, characterized in that: Two movable wheels (2) are provided on both the front and rear sides of the lower surface of the mounting base (1); the mounting base (1) is movably connected to two T-shaped rods (4) through two circular holes provided inside the mounting base (1); and the four T-shaped limit rods (12) are arranged in groups of two, and their relatively close ends are fixedly connected to the left and right ends of the protective shell (13).

3. The horizontal marking device for real estate surveying and mapping according to claim 1, characterized in that: The four T-shaped limit rods (12) are all sleeved with springs (11), a laser emitter (14) is arranged inside the protective shell (13), and the lower end of the laser emitter (14) is fixedly mounted on the upper end of the mounting plate (7).

4. The horizontal marking device for real estate surveying and mapping according to claim 1, characterized in that: The limiting assembly (3) comprises two concave fixing plates (33), the lower ends of the two concave fixing plates (33) are fixedly connected to the upper end of the mounting base (1), the two concave fixing plates (33) are movably connected to the left and right side bare rod parts of the threaded rod (34) through the connection holes provided therein, the threaded rod (34) is threadedly connected to two vertical plates (35) provided with threaded holes therein, the upper ends of the two vertical plates (35) are fixedly connected to the lower ends of the two L-shaped toothed plates (6), and the two vertical plates (35) are fixedly connected to the lower ends of the two L-shaped toothed plates (6). The lower ends of the two hinged rods (32) are movably connected to each other. The lower ends of the two hinged rods (32) respectively pass through two through grooves provided inside the mounting base (1) and are movably connected to the upper end of the limiting base plate (31). The front and rear sides of the upper surface of the limiting base plate (31) are respectively fixedly connected to the lower ends of the two T-shaped rods (4). The two vertical plates (35) are movably connected to the fixing rod 1 (36) through the circular holes provided inside the two vertical plates (35). The left and right ends of the fixing rod 1 (36) are respectively fixedly connected to the relatively close ends of the two concave fixing plates (33).

5. The horizontal marking device for real estate surveying and mapping according to claim 1, characterized in that: The height adjustment assembly (5) comprises a support frame (54), the lower end of the support frame (54) is fixedly connected to the upper end of the mounting base (1), the support frame (54) is movably connected to a threaded sleeve (58) through a connection hole opened inside the upper end thereof, the threaded sleeve (58) is threadedly connected to a second threaded rod (53), the lower end of the second threaded rod (53) is fixedly connected to the upper end of a connecting plate (51), the upper surface of the connecting plate (51) is fixedly connected to two fixing rods (52) on both left and right sides, and the two fixing rods (52) are both connected to the inner opening of the upper end. A support frame (54) is provided with two circular holes and is movably connected. The upper ends of the two fixed rods (52) and the threaded rod (53) are fixedly connected to the lower end of the mounting plate (7). The threaded sleeve (58) is fixedly connected with a bevel gear (56). The bevel gear (56) is meshed with a bevel gear (59) for transmission. The bevel gear (59) is fixedly connected with the front end of a rotating shaft (57). The rotating shaft (57) is movably connected with an L-shaped plate (55). The front end of the L-shaped plate (55) is fixedly connected with the rear end of the support frame (54).

6. The horizontal marking device for real estate surveying and mapping according to claim 1, characterized in that: The two pushing assemblies (8) each comprise a gear (83), the two gears (83) are respectively meshed with the two L-shaped toothed plates (6) for transmission, the two gears (83) are respectively fixedly connected to the lower ends of the two worms (84), the two worms (84) are respectively meshed with the two worm wheels (86) for transmission, the two worm wheels (86) are respectively fixedly connected to the rear ends of the two rotating shafts (87), and the front ends of the two rotating shafts (87) are both fixedly connected with a cam (85).

7. The horizontal marking device for real estate surveying and mapping according to claim 6, characterized in that: The relatively close ends of the two cams (85) are overlapped with the relatively far ends of the two L-shaped protective plates (9), and the two rotating shafts (87) are movably connected with L-shaped plates (82). The relatively close ends of the two L-shaped plates (82) are fixedly connected with the left and right ends of the mounting plate (7), and the upper side light rod positions of the two worm gears (84) are movably connected with support plates (81). The relatively close ends of the two support plates (81) are fixedly connected with the left and right ends of the mounting plate (7).