Worm gear case lengthening device

Abstract

The utility model relates to a worm gear case lengthening device which comprises a worm gear case connected with a valve, a secondary positive gear case is installed on one side of the worm gear case, a bevel gear transmission mechanism is arranged at the end, away from the worm gear case, of the secondary positive gear case, an installation groove is formed in the secondary positive gear case, and a lengthening device body in linkage with the bevel gear transmission mechanism is arranged on the installation groove. An input shaft is installed at the end, away from the bevel gear transmission mechanism, of the lengthening device, a planetary reducer is arranged between the lengthening device and the input shaft, the input shaft is rotated to drive the lengthening device to rotate, the lengthening device is in linkage with a bevel gear to drive the bevel gear transmission mechanism, the bevel gear transmission mechanism drives a second-stage positive gear box, and the second-stage positive gear box drives a worm gear box. The lengthening device penetrates through a soil layer to enable the planetary reducer to be located on the ground, the occupied space is small, when the planetary reducer needs to be checked and replaced, the worm gear case does not need to be dug out, the planetary reducer can be directly checked and replaced, and operation is convenient and easy.

Description

Technical Field

[0001] The utility model relates to the technical field of worm gear boxes, and particularly relates to a worm gear box lengthening device. Background Art

[0002] A worm gear box is a driving component, which is combined with a valve and can drive and regulate the flow of the medium in the pipeline. It is mainly composed of a worm or gear, a shaft, bearings, and a machine case, etc. The worm or gear, shaft, and bearings are all supported by the machine case, and the worm gear box can be divided into two types: manual and electric according to the usage method.

[0003] In use, the worm gear box can be placed on the ground and used in combination with the valve, or it can be placed underground and used in combination with the valve. Placing the worm gear box on the ground for use takes up more space. By using it buried underground, only the operating handle is exposed to the ground surface, which is inconvenient for checking the planetary reducer and replacing the planetary reducer. When it is necessary to check and replace the planetary reducer, the worm gear box needs to be dug out. Content of the Utility Model

[0004] The technical problem to be solved by the utility model lies in aiming at the deficiencies of the above-mentioned prior art.

[0005] To provide a worm gear box lengthening device 。

[0006] To achieve the above object, the utility model provides the following technical solution: A worm gear box lengthening device, including a worm gear box connected to a valve, a secondary spur gear box is installed on one side of the worm gear box, a bevel gear transmission mechanism is provided at one end of the secondary spur gear box away from the worm gear box, an installation groove is provided on the secondary spur gear box, a lengthening device linked with the bevel gear transmission mechanism is provided on the installation groove, an input shaft is installed at one end of the lengthening device away from the bevel gear transmission mechanism, and a planetary reducer is provided between the lengthening device and the input shaft.

[0007] By adopting the above technical solution, rotating the input shaft drives the lengthening device to rotate. Since the lengthening device is linked with the bevel gear transmission mechanism, it drives the bevel gear transmission mechanism, enabling the bevel gear transmission mechanism to drive the secondary spur gear box, and the secondary spur gear box drives the worm gear box, thereby adjusting the valve. A lengthening device is added to the installation groove of the secondary spur gear box, and the worm gear box is used buried underground. The lengthening device penetrates through the soil layer, making the planetary reducer located on the ground surface, occupying less space. When it is necessary to check the situation of the planetary reducer and replace the planetary reducer, there is no need to dig out the worm gear box, and the planetary reducer can be directly checked and replaced, and the operation is convenient and simple.

[0008] The further setting of the above technical solution is as follows: The lengthening device includes a lengthening rod and a transmission shaft connected to the installation groove. The transmission shaft is located inside the lengthening rod, and first deep groove bearings and second deep groove bearings are respectively installed at both ends of the transmission shaft. The first deep groove bearing is located on the installation groove, and the second deep groove bearing is located between the lengthening rod and the planetary reducer. One end of the transmission shaft passes through the first deep groove bearing and extends towards the installation groove to be rotationally matched with the bevel gear transmission mechanism, and the other end passes through the second deep groove bearing and extends towards the planetary reducer to be connected to the input shaft.

[0009] By adopting the above technical solution, the lengthening rod is used to protect the transmission shaft. The lengthening rod and the transmission shaft pass through the soil layer to bring the planetary reducer to the ground, occupying a small space. When inspecting and replacing the planetary reducer, there is no need to dig out the worm gear box for operation, and the situation of the planetary reducer can be directly inspected and the planetary reducer can be replaced. The structure is simple, and the first deep groove bearing and the second deep groove bearing on the transmission shaft facilitate the rotation of the transmission shaft.

[0010] The further setting of the above technical solution is as follows: Both ends of the lengthening rod are respectively connected to the installation groove and the planetary reducer through bolts.

[0011] The beneficial effects achieved by the present utility model are as follows: Rotating the input shaft drives the lengthening device to rotate. Due to the linkage between the lengthening device and the bevel gear, the bevel gear transmission mechanism is driven, causing the bevel gear transmission mechanism to drive the secondary spur gear box, and the secondary spur gear box drives the worm gear box, thereby adjusting the valve. An additional lengthening device is provided on the installation groove of the secondary spur gear box. The worm gear box is buried underground, and the lengthening device passes through the soil layer, enabling the planetary reducer to be located on the ground, occupying a small space. When it is necessary to inspect and replace the planetary reducer, there is no need to dig out the worm gear box, and the planetary reducer can be directly inspected and replaced, with convenient and simple operation. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0013] Figure 2 is a top view structural diagram of an embodiment of the present utility model;

[0014] Figure 3 is a schematic structural diagram of the handwheel of the worm gear box of an embodiment of the present utility model.

[0015] In the figure: 1, worm gear box; 2, secondary spur gear box; 21, installation groove; 3, input shaft; 4, lengthening rod; 5, transmission shaft; 51, first deep groove bearing; 52, second deep groove bearing; 6, planetary reducer; 7, input electric wheel; 8, handwheel. Detailed Description of the Embodiment Embodiment

[0016] As Figure 1-2A worm gear box lengthening device as shown includes a worm gear box 1 connected to a valve. A secondary spur gear box 2 is installed on one side of the worm gear box 1. An bevel gear transmission mechanism is provided at one end of the secondary spur gear box 2 away from the worm gear box 1. An installation groove 21 is provided on the secondary spur gear box 2. A lengthening device linked to the bevel gear transmission mechanism is provided on the installation groove 21. An input shaft 3 is installed at one end of the lengthening device away from the bevel gear transmission mechanism. An input electric wheel 7 is installed on the input shaft 3. A planetary reducer 6 is provided between the lengthening device and the input shaft 3. When the input electric wheel 7 rotates, the input shaft 3 drives the lengthening device to rotate. Since the lengthening device is linked to the bevel gear transmission mechanism, it drives the bevel gear transmission mechanism, causing the bevel gear transmission mechanism to drive the secondary spur gear box 2, and the secondary spur gear box 2 drives the worm gear box 1, thereby adjusting the valve. By adding a lengthening device to the installation groove 21 of the secondary spur gear box 2 and burying the worm gear box in the ground, the lengthening device passes through the soil layer, making the planetary reducer 6 located on the ground, occupying less space. When it is necessary to inspect and replace the planetary reducer 6, there is no need to dig out the worm gear box 1, and the planetary reducer 6 can be directly inspected and replaced, with convenient and simple operation.

[0017] The lengthening device includes a lengthening rod 4 and a transmission shaft 5 connected to the installation groove 21. The transmission shaft 5 is located inside the lengthening rod 4, and a first deep groove bearing 51 and a second deep groove bearing 52 are respectively installed at both ends of the transmission shaft 5. The first deep groove bearing 51 is located on the installation groove 21, and the second deep groove bearing 52 is located between the lengthening rod 4 and the planetary reducer 6. One end of the transmission shaft 5 passes through the first deep groove bearing 51 and extends towards the installation groove 21 to rotate in cooperation with the bevel gear transmission mechanism, and the other end passes through the second deep groove bearing 52 and extends towards the planetary reducer 6 to be connected to the input shaft 3. The lengthening rod 4 is used to protect the transmission shaft 5. The lengthening rod 4 and the transmission shaft 5 pass through the soil layer to bring the planetary reducer 6 to the ground, occupying less space. When inspecting and replacing the planetary reducer 7, there is no need to dig out the worm gear box 1 for operation, and the planetary reducer 7 can be directly inspected and replaced, which is convenient and simple. The first deep groove bearing 51 and the second deep groove bearing 52 on the transmission shaft 5 facilitate the rotation of the transmission shaft 5.

[0018] Both ends of the lengthening rod 4 are respectively connected to the installation groove 21 and the planetary reducer 6 by bolts. Embodiment

[0019] In this embodiment, compared with Embodiment 1, except that a handwheel 8 is installed on the input shaft 3 while an input electric wheel 7 is installed on the input shaft 3 in Embodiment 1, the rest of the structures are the same as those in Embodiment 1.

[0020] As Figure 3 shown, a handwheel 8 is installed on the input shaft 3.

Claims

1. A worm gear box extension device, comprising a worm gear box connected to a valve, a secondary spur gear box installed on one side of the worm gear box, and a bevel gear transmission mechanism is provided at one end of the secondary spur gear box away from the worm gear box, characterized in that: The secondary spur gear box is provided with a mounting groove, the mounting groove is provided with an extension device linked with the bevel gear transmission mechanism, the extension device is provided with an input shaft at one end away from the bevel gear transmission mechanism, and a planetary reducer is provided between the extension device and the input shaft.

2. A worm gear box lengthening device according to claim 1, characterized in that: The extension device includes an extension rod connected to the mounting groove and a transmission shaft, the transmission shaft is located in the extension rod, and a first deep groove bearing and a second deep groove bearing are respectively installed at both ends of the transmission shaft, the first deep groove bearing is located on the mounting groove, and the second deep groove bearing is located between the extension rod and the planetary reducer, one end of the transmission shaft passes through the first deep groove bearing and extends toward the mounting groove to rotate with the bevel gear transmission mechanism, and the other end passes through the second deep groove bearing and extends toward the planetary reducer to be connected to the input shaft.

3. A worm gear box lengthening device according to claim 2, characterized in that: The two ends of the extension rod are respectively connected to the mounting groove and the planetary reducer through bolts.

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