Precise worm and gear box of excavator

Abstract

The precise worm and gear box comprises a shell, connecting covers and a fixing plate, bearing seats are arranged on the outer walls of the two sides of the shell, supporting plates are installed on the outer walls of the two sides of the shell, the connecting covers are arranged on the outer walls of the two sides of the shell, and air inlet pipes are installed on the outer walls of the upper ends of the connecting covers in an inserted mode. The air pressure in the connecting cover is kept through the connecting cover, the air inlet pipe and the exhaust pipe, pressure can be applied to the gap of the shell according to the air pressure, lubricating oil is prevented from seeping out, the leakage probability of the lubricating oil is reduced, and a worker can conveniently know the sealing performance of the shell.

Description

Technical Field

[0001] The utility model belongs to the technical field of excavators, in particular to a precision worm gear box for an excavator. Background Art

[0002] Excavator, also known as excavator or backhoe, is an important engineering machinery, mainly used for digging soil, silt and other materials. Excavator precision worm gearbox is a precision transmission device for excavator, which uses the meshing of worm wheel and worm to convert and transmit power. The worm gearbox is mainly composed of worm wheel and worm, which transmit power through sliding contact. The worm is similar to a spiral gear, while the worm wheel is a gear meshing with the worm. When the worm rotates, the thread on it pushes the worm wheel to move axially, thereby realizing power output. Due to the particularity of this structure, the worm gearbox can achieve a large transmission ratio, and usually an angular transmission of 90 degrees.

[0003] Although the prior art has many benefits, it still has the following problems: it lacks a detection structure for the oil leakage of the worm gear box, which leads to the lubricating oil leakage in the shell connection position of the worm gear box after long-term use, and the staff cannot understand the sealing of the worm gear box in time. Utility Model Content

[0004] The utility model aims to provide a precision worm gear box for an excavator to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a precision worm gear box for an excavator, comprising an outer shell, a connecting cover and a fixing plate, bearing seats are provided on both sides of the outer walls of the outer shell, support plates are installed on both sides of the outer walls of the outer shell, connecting covers are provided on both sides of the outer walls of the outer shell, an air intake pipe is plugged into the outer wall of the upper end of the connecting cover, and an exhaust pipe is plugged into the outer wall of the lower end of the connecting cover.

[0006] Preferably, a first transmission shaft and a second transmission shaft are rotatably mounted inside the two bearing seats respectively, the first transmission shaft is located at the upper end of the outer side of the shell, and the second transmission shaft is located at the lower end of the outer side of the shell.

[0007] Preferably, fixing plates are installed on both upper and lower outer walls of the shell, and first bolts equidistantly distributed in parallel are arranged inside the fixing plates, and the fixing plates are connected by the first bolts.

[0008] Preferably, the outer wall of the connection cover is installed with connection blocks distributed in a rectangular array, and the second bolts are arranged inside the connection blocks.

[0009] Preferably, a first sealing gasket is fixedly attached to an outer wall of one side of the support plate, and the first sealing gasket is in contact with an inner wall of the connection cover.

[0010] Preferably, second sealing gaskets are fitted and fixed to outer walls on opposite sides of the two connection covers, and the second sealing gaskets are in contact with each other.

[0011] Preferably, the air inlet pipe and the exhaust pipe are both connected to the interior of the connection cover.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. A precision worm gear box for an excavator is provided with a connecting cover, an air intake pipe and an exhaust pipe. Such an arrangement connects the connecting block according to a second bolt, thereby connecting and fixing the connecting cover, ensuring the position stability of the connecting cover on the outside of the outer shell, and the connecting cover can shield the gap between the outer shells, and according to the first sealing gasket and the second sealing gasket, ensure the shielding and sealing of the gap. An external air pump conveys gas to the inside of the connecting cover through the air intake pipe to maintain the air pressure inside the connecting cover, and can apply pressure to the outer shell gap according to the air pressure to prevent the lubricating oil from seeping out, thereby reducing the probability of lubricating oil leakage, and the staff can discharge the gas inside the connecting cover and the leaked lubricating oil through the exhaust pipe, thereby achieving the effect of facilitating the staff to understand the sealing of the outer shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the appearance of the shell structure of the utility model;

[0015] Figure 2 It is an enlarged schematic diagram of the shell structure of the utility model;

[0016] Figure 3 It is an enlarged schematic diagram of the connection cover structure of the utility model.

[0017] In the figure: 1. outer shell; 11. first transmission shaft; 12. bearing seat; 13. second transmission shaft; 14. fixing plate; 15. first bolt; 16. support plate; 17. first sealing gasket; 2. connecting cover; 21. second sealing gasket; 22. connecting block; 23. second bolt; 24. intake pipe; 25. exhaust pipe. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figure 1-3 The utility model provides a technical solution: a precision worm gear box for an excavator, comprising a shell 1, a connecting cover 2 and a fixing plate 14, bearing seats 12 are arranged on the outer walls on both sides of the shell 1, support plates 16 are installed on the outer walls on both sides of the shell 1, connecting covers 2 are arranged on the outer walls on both sides of the shell 1, an air intake pipe 24 is plugged and installed on the outer wall at the upper end of the connecting cover 2, and an exhaust pipe 25 is plugged and installed on the outer wall at the lower end of the connecting cover 2.

[0020] The first transmission shaft 11 and the second transmission shaft 13 are rotatably mounted inside the two bearing seats 12. The first transmission shaft 11 is located at the upper end of the outer side of the housing 1, and the second transmission shaft 13 is located at the lower end of the outer side of the housing 1. The first transmission shaft 11 and the second transmission shaft 13 are connected to the turbine and the worm respectively, and the bearing seats 12 ensure the rotation position stability of the first transmission shaft 11 and the second transmission shaft 13.

[0021] The outer walls of the upper and lower sides of the housing 1 are both provided with fixing plates 14, and the fixing plates 14 are provided with first bolts 15 equidistantly and parallelly distributed inside, and the fixing plates 14 are connected by the first bolts 15. The fixing plates 14 and the first bolts 15 can connect the housing 1.

[0022] The outer wall of the connection cover 2 is provided with connection blocks 22 distributed in a rectangular array, and the connection blocks 22 are provided with second bolts 23 inside. The second bolts 23 and the connection blocks 22 connect the connection cover 2.

[0023] A first sealing gasket 17 is fixedly attached to the outer wall of one side of the support plate 16 , and the first sealing gasket 17 is in contact with the inner wall of the connection cover 2 . The first sealing gasket 17 ensures the sealing between the support plate 16 and the connection cover 2 .

[0024] The outer walls of the two connection covers 2 on opposite sides are both fitted with second sealing gaskets 21 , and the second sealing gaskets 21 are in contact with each other. The second sealing gaskets 21 ensure the sealing between the connection covers 2 .

[0025] The air inlet pipe 24 and the exhaust pipe 25 are both connected to the inside of the connection cover 2. The air inlet pipe 24 is connected to an external air pump, and gas is transported to the inside of the connection cover 2 through the air pump and the air inlet pipe 24. The gas and lubricating oil in the connection cover 2 are discharged together through the exhaust pipe 25. The second bolt 23 connects the connection block 22, thereby connecting and fixing the connection cover 2, ensuring the position stability of the connection cover 2 outside the shell 1, and the connection cover 2 can cover the gap between the shells 1. According to the first sealing gasket 17 and the second sealing gasket 21, the sealing of the gap is ensured. The external air pump transports gas to the inside of the connection cover 2 through the air inlet pipe 24, maintains the air pressure inside the connection cover 2, and can apply pressure to the gap of the shell 1 according to the air pressure to prevent the lubricating oil from seeping out, reducing the probability of lubricating oil leakage, and the staff can discharge the gas and leaked lubricating oil in the connection cover 2 through the exhaust pipe 25, achieving the effect of facilitating the staff to understand the sealing of the shell 1.

[0026] Working principle: The second bolt 23 connects the connecting block 22, thereby connecting and fixing the connecting cover 2, ensuring the position stability of the connecting cover 2 on the outside of the outer shell 1, and the connecting cover 2 can cover the gap between the outer shells 1, and according to the first sealing gasket 17 and the second sealing gasket 21, the sealing of the gap is ensured. The external air pump transports gas to the inside of the connecting cover 2 through the air inlet pipe 24, and the staff can discharge the gas and leaked lubricating oil inside the connecting cover 2 through the exhaust pipe 25.

[0027] Although 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 precision worm gear box for an excavator, comprising a housing (1), a connecting cover (2) and a fixing plate (14), characterized in that: The outer walls on both sides of the shell (1) are provided with bearing seats (12), the outer walls on both sides of the shell (1) are provided with support plates (16), the outer walls on both sides of the shell (1) are provided with connecting covers (2), the upper outer wall of the connecting cover (2) is plugged with an air intake pipe (24), and the lower outer wall of the connecting cover (2) is plugged with an exhaust pipe (25).

2. The precision worm gear box for excavators according to claim 1, characterized in that: A first transmission shaft (11) and a second transmission shaft (13) are rotatably mounted inside the two bearing seats (12), respectively; the first transmission shaft (11) is located at the upper end of the outer side of the housing (1), and the second transmission shaft (13) is located at the lower end of the outer side of the housing (1).

3. The precision worm gear box for excavators according to claim 1, characterized in that: The upper and lower outer walls of the housing (1) are both provided with fixing plates (14), and first bolts (15) are arranged inside the fixing plates (14) and are distributed in parallel at equal intervals. The fixing plates (14) are connected via the first bolts (15).

4. The precision worm gear box for excavators according to claim 1, characterized in that: The outer wall of the connection cover (2) is mounted with connection blocks (22) distributed in a rectangular array, and second bolts (23) are arranged inside the connection blocks (22).

5. The precision worm gear box for excavators according to claim 1, characterized in that: A first sealing gasket (17) is fixedly attached to an outer wall of one side of the support plate (16), and the first sealing gasket (17) is in contact with an inner wall of the connection cover (2).

6. The precision worm gear box for excavators according to claim 1, characterized in that: Second sealing pads (21) are fitted and fixed to the outer walls of the two connecting covers (2) on opposite sides, and the second sealing pads (21) are in contact with each other.

7. The precision worm gear box for excavators according to claim 1, characterized in that: The air inlet pipe (24) and the exhaust pipe (25) are both connected to the interior of the connection cover (2).

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