A gearbox airtightness auxiliary testing device

Abstract

This invention provides an auxiliary device for testing the airtightness of a gearbox, comprising a controller, a high-pressure air source, a first support base, a second support base, an upper vent sealing assembly, a lower sealing assembly, and a left sealing assembly. The upper vent sealing assembly includes an upper half-shaft bore sealing plug, an oil filler hole sealing post, and an oil drain hole sealing post, all of which are capable of reciprocating up-and-down movement and positioning. The high-pressure air source provides high-pressure airflow to the oil drain hole sealing post. The lower sealing assembly includes a lower half-shaft bore sealing plug, which is capable of moving up, down, left, and right and positioning. The left sealing assembly includes a vent sealing post, which is capable of moving left, right, up, and down and positioning. The controller controls the operation of the high-pressure air source, the upper vent sealing assembly, the lower sealing assembly, and the left sealing assembly. This invention improves the efficiency of gearbox airtightness testing while ensuring testing quality.

Description

Technical Field

[0001] This utility model relates to the field of gearbox testing technology, specifically to an auxiliary testing device for the airtightness of a gearbox. Background Technology

[0002] A gearbox (also known as a speed reducer) is a mechanical device that reduces input speed and increases output torque through transmission mechanisms such as gears and worm gears. It is widely used in industrial equipment, transportation, robotics, and other fields. During normal use, a gearbox is filled with a certain amount of lubricating oil. The lubricating oil's multiple functions, including lubrication, cooling, and cleaning, ensure the long-term stable operation of the gearbox.

[0003] To prevent oil leaks in the gearbox, its airtightness needs to be tested after assembly. Currently, airtightness testing typically involves manually sealing the corresponding through holes using bolts or other tools before pressurizing for testing. Because gearboxes have numerous through holes, manual sealing is inefficient and cannot guarantee sealing quality, leading to inconsistent and unregulated sealing standards. Furthermore, the need to manually remove bolts or other tools after testing further reduces the efficiency of airtightness testing. Utility Model Content

[0004] The purpose of this invention is to provide an auxiliary device for detecting the air tightness of a gearbox. This invention can improve the efficiency of gearbox air tightness detection while ensuring the quality of the detection.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a gearbox airtightness auxiliary testing device, including a controller, a high-pressure air source, a first support base, a second support base, an upper vent sealing assembly, a lower sealing assembly, and a left sealing assembly. The upper vent sealing assembly and the lower sealing assembly are both mounted on the first support base. The upper vent sealing assembly includes an upper half-shaft hole sealing plug, an oil filling hole sealing post, and an oil drain hole sealing post. The upper half-shaft hole sealing plug, the oil filling hole sealing post, and the oil drain hole sealing post are capable of reciprocating up and down movement and positioning. The upper half-shaft hole sealing plug is used to seal the upper half-shaft hole on the gearbox, the oil filling hole sealing post is used to seal the oil filling hole on the gearbox, and the oil drain hole sealing post is used to seal the oil filling hole on the gearbox. The hole sealing post can achieve a sealed connection with the oil drain hole on the gearbox, and the high-pressure air source can provide high-pressure airflow to the oil drain hole sealing post; the lower sealing assembly includes a lower half-shaft shaft hole sealing plug, which can move up, down, left, and right and be positioned, and is used to seal the lower half-shaft shaft hole on the gearbox; the left sealing assembly is set on the second support base, and includes a vent hole sealing post, which is used to seal the vent hole on the gearbox, and can move left, right, up, and down and be positioned; the controller can control the operation of the high-pressure air source, the upper vent sealing assembly, the lower sealing assembly, and the left sealing assembly.

[0006] Preferably, the upper vent sealing assembly includes a first linear reciprocating motion mechanism and a first movable seat. The first linear reciprocating motion mechanism is mounted on the first support seat and can drive the first movable seat to move up and down and be positioned. Three top-pressing uprights are fixedly and vertically mounted at the bottom of the first movable seat. The upper half-shaft hole sealing plug, the oil filling hole sealing column, and the oil drain hole sealing column are respectively fixedly mounted at the bottom of the three top-pressing uprights. The oil drain hole sealing column is hollow inside. A first connector communicating with the inside is provided on the upper side wall of the oil drain hole sealing column. An air outlet communicating with the inside is provided at the bottom of the oil drain hole sealing column.

[0007] Furthermore, a first photoelectric detection switch and a second photoelectric detection switch are provided on the first support base. Both the first photoelectric detection switch and the second photoelectric detection switch are electrically connected to the controller. The first photoelectric detection switch is used to realize the lower limit detection of the first moving base, and the second photoelectric detection switch is used to realize the upper limit detection of the first moving base.

[0008] Furthermore, the lower sealing assembly includes a second linear reciprocating motion mechanism, a second movable seat, a third linear reciprocating motion mechanism, and a third movable seat. The second movable seat is disposed on the first support seat. The second linear reciprocating motion mechanism is used to drive the second movable seat to perform up-and-down reciprocating motion and positioning. The third movable seat is disposed on the second movable seat. The third linear reciprocating motion mechanism is used to drive the third movable seat to perform left-and-right reciprocating motion and positioning. The lower half-shaft hole sealing plug is fixedly disposed on the upper left side of the third movable seat.

[0009] Furthermore, the left sealing assembly includes a fourth linear reciprocating motion mechanism and a fifth linear reciprocating motion mechanism. The fourth linear reciprocating motion mechanism is disposed on the second support base. The fourth linear reciprocating motion mechanism is used to realize the up-and-down movement and positioning of the fifth linear reciprocating motion mechanism. The fifth linear reciprocating motion mechanism is used to drive the left-and-right movement and positioning of the vent sealing column.

[0010] Furthermore, the first linear reciprocating motion mechanism, the second linear reciprocating motion mechanism, the third linear reciprocating motion mechanism, and the fifth linear reciprocating motion mechanism are all cylinders.

[0011] Furthermore, the fourth linear reciprocating motion mechanism is a lead screw linear transmission mechanism.

[0012] The beneficial effects of this utility model are: It has a simple structure and is convenient to manufacture; in practical applications, after the assembled and sealed gearbox is moved to the designated position, the controller automatically activates the upper vent sealing component, the lower sealing component, and the left sealing component according to the set operating procedure to seal the through holes at the corresponding positions of the gearbox. After sealing, it automatically pressurizes, and after pressurization, the internal sealing performance of the gearbox can be evaluated based on the changes in air pressure. Using the upper vent sealing component, the lower sealing component, and the left sealing component to seal the through holes of the gearbox results in high sealing efficiency and reliable sealing quality, thereby ensuring the quality of airtightness testing. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some preferred embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0015] Figure 2 This is a front view of the overall structure of this utility model;

[0016] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0017] Figure 4 for Figure 1 Enlarged view at point B in the middle;

[0018] In the diagram: 1 First support seat, 2 Second support seat, 31 Upper half shaft hole sealing plug, 32 Oil filling hole sealing column, 33 Oil drain hole sealing column, 331 First connector, 332 Air outlet, 34 First linear reciprocating motion mechanism, 35 First moving seat, 351 Support rod, 36 First photoelectric detection switch, 37 Second photoelectric detection switch, 41 Lower half shaft hole sealing plug, 42 Second linear reciprocating motion mechanism, 43 Second moving seat, 44 Third linear reciprocating motion mechanism, 45 Third moving seat, 451 Linear slide rail, 51 Vent hole sealing column, 52 Fourth linear reciprocating motion mechanism, 53 Fifth linear reciprocating motion mechanism. Detailed Implementation

[0019] The following will describe specific embodiments and appendices. Figure 1-4 The technical solutions in the embodiments of this utility model are clearly and completely described below. Obviously, the described embodiments are only some preferred embodiments of this utility model, and not all embodiments. Those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0020] This utility model provides an auxiliary testing device for the airtightness of a gearbox (such as...). Figure 1As shown, the system includes a controller, a high-pressure air source, a first support base 1, a second support base 2, an upper vent sealing assembly, a lower sealing assembly, and a left sealing assembly. In this specific embodiment, the controller can be a PLC controller known and commonly used in the field of automation technology, and the high-pressure air source can be a commercially available and mature air compressor. In actual application, the first support base 1 and the second support base 2 are fixedly installed on the ground and distributed on both sides of the gearbox conveying track. The upper vent sealing assembly and the lower sealing assembly are both installed on the first support base 1. The upper vent sealing assembly includes an upper half-shaft hole sealing plug 31, an oil filling hole sealing column 32, and an oil drain hole sealing column 33. The oil hole sealing column 33 can reciprocate up and down and be positioned. The upper half shaft hole sealing plug 31 is used to seal the upper half shaft hole on the gearbox. The oil filling hole sealing column 32 is used to seal the oil filling hole on the gearbox. The oil drain hole sealing column 33 can achieve a sealed connection with the oil drain hole on the gearbox. In practical applications, by utilizing the reciprocating up and down movement and positioning capabilities of the upper half shaft hole sealing plug 31, the oil filling hole sealing column 32, and the oil drain hole sealing column 33, synchronous and automated sealing of the upper half shaft hole, oil filling hole, and oil drain hole on the gearbox at corresponding positions can be achieved, thereby improving the airtightness testing efficiency of the gearbox. The high-pressure air source can provide high-pressure airflow to the oil drain hole sealing column 33. During operation, after sealing all the through holes of the gearbox, a certain amount of high-pressure gas is injected into the gearbox using a high-pressure gas source. After the high-pressure gas injection is completed, the air pressure inside the gearbox is monitored in real time using a pressure sensor. If the monitored air pressure value remains stable for a certain period of time, it indicates that the gearbox's airtightness is qualified. If the monitored air pressure value cannot remain stable for a certain period of time and decreases, it indicates that the gearbox's airtightness is unqualified. The lower sealing assembly includes a lower half-shaft shaft hole sealing plug 41. The lower half-shaft shaft hole sealing plug 41 can move up, down, left, and right and is positioned. The lower half-shaft shaft hole sealing plug 41 is used to seal the lower half-shaft shaft hole on the gearbox. The sealing plug 41 has up-down, left-right, and positioning functions, which can realize the automatic sealing of the lower half shaft hole at the bottom of the gearbox, thereby improving the air tightness testing efficiency of the gearbox; the left sealing component is set on the second support 2, and the left sealing component includes a vent sealing column 51. The vent sealing column 51 is used to seal the vent on the gearbox. The vent sealing column 51 can move left-right, up-down, and positioning. By utilizing the left-right, up-down, and positioning capabilities of the vent sealing column 51, the automatic sealing of the vent valve mounting hole on the left side of the gearbox can be realized, thereby improving the air tightness testing efficiency of the gearbox; the controller can control the operation of the high-pressure air source, the upper vent sealing component, the lower sealing component, and the left sealing component.By using a controller to coordinate the automated and orderly operation of the high-pressure air source, the upper venting and sealing assembly, the lower sealing assembly, and the left sealing assembly, the airtightness testing of the entire gearbox can be quickly achieved, thereby greatly improving the overall airtightness testing efficiency of the gearbox.

[0021] Based on the above embodiments, the specific implementation of the upper venting and sealing assembly to achieve vertical movement and positioning functions is as follows: The upper venting and sealing assembly includes a first linear reciprocating motion mechanism 34 and a first movable seat 35. The first linear reciprocating motion mechanism is disposed on the first support base 1, and the first linear reciprocating motion mechanism can drive the first movable seat 35 to move vertically and position itself. Specifically, the first linear reciprocating motion mechanism is a cylinder, which can be powered by a high-pressure air source. The first movable seat 35 is L-shaped, and two [unclear] components are disposed on the first support base 1. Parallel linear guides are provided, and several linear sliding guide sliders are mounted on the rear of the first movable seat 35. A cylinder is fixedly mounted on the first support seat 1, and the movable end of the cylinder is fixedly connected to the first movable seat 35. The extension and retraction of the cylinder realizes the up-and-down reciprocating motion of the first movable seat 35. When the cylinder stops its extension and retraction, the first movable seat 35 is positioned. Three top-pressing rods 351 are fixedly and vertically mounted at the bottom of the first movable seat 35. The upper half shaft hole sealing plug 31, the oil filling hole sealing post 32, and the oil drain hole sealing post 33 are respectively fixedly mounted on the three top-pressing rods. At the bottom of the upright 351, during the actual sealing process, the upper half-shaft hole sealing plug 31 is directly inserted into the sealing ring of the upper half-shaft hole. The tight fit between the upper half-shaft hole sealing plug 31 and the sealing ring achieves an airtight seal for the upper half-shaft hole. The bottoms of the oil filling hole sealing column 32 and the oil drain hole sealing column 33 are both rubber columns. The rubber columns are tightly pressed against the ends of the corresponding oil filling hole and oil drain hole to achieve an airtight seal. The oil drain hole sealing column 33 is hollow inside, and a first connector 331 communicating with its interior is provided on the upper side wall of the oil drain hole sealing column 33. A vent 332 is provided at the bottom of the gearbox and communicates with its interior. When performing air tightness testing, a high-pressure air source delivers high-pressure airflow to the first connector 331 through the air pipe, and then the high-pressure airflow enters the gearbox through the vent, thereby enabling high-pressure air tightness testing of the gearbox. To facilitate real-time monitoring of the air pressure stability inside the gearbox, a pressure sensor can be installed on the air pipe communicating with the first connector 331. By using the pressure sensor to detect the feedback air pressure data, the air pressure inside the gearbox can be quantitatively detected, thereby effectively ensuring the quality of the gearbox air tightness test.When the cylinder is used to move the first moving seat 35 up and down, the movement of the upper shaft hole sealing plug 31, the oil filling hole sealing column 32, and the oil drain hole sealing column 33 is realized. In practical applications, to improve the accuracy of movement control of the upper shaft hole sealing plug 31, the oil filling hole sealing column 32, and the oil drain hole sealing column 33, a first photoelectric detection switch 36 and a second photoelectric detection switch 37 are provided on the first support seat 1. Both the first photoelectric detection switch 36 and the second photoelectric detection switch 37 are electrically connected to the controller. The first photoelectric detection switch 36 is used to realize the lower limit detection of the first moving seat 35, and the second photoelectric detection switch 37 is used to realize the upper limit detection of the first moving seat 35. The first photoelectric detection switch 36 and the second photoelectric detection switch 37 are electrically connected to the controller. Through the detection feedback signals of the first photoelectric detection switch 36 and the second photoelectric detection switch 37, the precise control of the up and down position of the first moving seat 35 is realized, thereby realizing the precise control of the position of the upper shaft hole sealing plug 31, the oil filling hole sealing column 32, and the oil drain hole sealing column 33. In practical applications, the gearbox can be precisely moved to the designated airtightness testing position via a mobile conveying mechanism, thus providing a guarantee for subsequent automated airtightness testing.

[0022] Based on the above embodiments, the specific implementation of the lower sealing assembly to achieve left-right, up-down, and positioning functions is as follows: The lower sealing assembly includes a second linear reciprocating motion mechanism 42, a second movable seat 43, a third linear reciprocating motion mechanism 44, and a third movable seat 45. The second linear reciprocating motion mechanism 42 is used to drive the second movable seat 43 to perform up-down reciprocating motion and positioning. The third movable seat 45 is disposed on the second movable seat 43. The third linear reciprocating motion mechanism 44 is used to drive the third movable seat 45 to perform left-right reciprocating motion and positioning. In this specific embodiment, the second linear reciprocating motion mechanism 42 and the third linear reciprocating motion mechanism 44 can be evenly distributed in one cylinder, simultaneously utilizing high pressure. The air source provides power to the second linear reciprocating mechanism 42 and the third linear reciprocating mechanism 44. The second movable seat 43 is a flat plate and is mounted on the first support seat 1. Specifically, a number of linear guide sliders are provided at the rear of the second movable seat 43. A linear guide is provided on the first support seat 1 to cooperate with the linear guide sliders at the rear of the second movable seat 43. A number of linear guide sliders distributed on the same straight line are provided on the second movable seat 43. A linear guide 451 is fixedly mounted on the linear guide sliders of the second movable seat 43 at the rear of the third movable seat 45. The lower half shaft hole sealing plug 41 is fixedly mounted on the upper left side of the third movable seat 45. When sealing the lower half-shaft hole at the bottom of the gearbox using the lower half-shaft hole sealing plug 41, the third linear reciprocating motion mechanism 45 first moves the lower half-shaft hole sealing plug 41 to the left. After it moves into position, the second linear reciprocating motion mechanism 42 moves the lower half-shaft hole sealing plug 41 upward. Once the lower half-shaft hole sealing plug 41 has moved upward to the set position, the lower half-shaft hole is sealed. Specifically, the lower half-shaft hole sealing plug 41 is directly inserted into the sealing ring of the lower half-shaft hole. The tight fit between the lower half-shaft hole sealing plug 41 and the sealing ring achieves an airtight seal for the lower half-shaft hole. In this specific embodiment, a photoelectric detection switch can also be used to precisely control the up-down and left-right movement of the lower half-shaft hole sealing plug 41.

[0023] Based on the above embodiments, the left sealing assembly includes a fourth linear reciprocating motion mechanism 52 and a fifth linear reciprocating motion mechanism 53. The fourth linear reciprocating motion mechanism 52 is mounted on the second support base 2. The fourth linear reciprocating motion mechanism is used to realize the up-and-down movement and positioning of the fifth linear reciprocating motion mechanism. The fifth linear reciprocating motion mechanism is used to drive the left-and-right movement and positioning of the vent sealing column 51. Specifically, the fourth linear reciprocating motion mechanism 52 can be a lead screw linear transmission mechanism. The fifth linear reciprocating motion mechanism 53 is integrally mounted on the movable slider of the fourth linear reciprocating motion mechanism 52, and is driven by the rotation of the lead screw. The fifth linear reciprocating motion mechanism 53 can be adjusted and positioned vertically. The fifth linear reciprocating motion mechanism can be a cylinder. To further improve the linearity of the left and right movement of the vent sealing column 51, the fifth linear reciprocating motion mechanism can be a guide cylinder. The precise guiding ability of the guide cylinder can improve the movement accuracy of the vent sealing column 51. The reciprocating movement of the piston rod of the guide cylinder can realize the left and right movement and positioning of the vent sealing column 51. After the gearbox moves to the designated airtightness test position, the guide cylinder can make the vent sealing column 51 press precisely against the end face of the vent of the gearbox, thereby achieving the sealing of the vent.

[0024] In practical applications, once the gearbox is moved to the designated airtightness testing position using the conveying device, the gearbox stops moving. Simultaneously, the controller first moves the upper half-shaft bore sealing plug 31, the oil filling hole sealing column 32, and the oil drain hole sealing column 33 downwards. After these components are in place, the controller then moves the lower half-shaft bore sealing plug 41 to the left. Once in place to the left, it moves upwards. After the lower half-shaft bore sealing plug 41 is in place, the controller moves the vent sealing column 51 to the right. Once in place to the right, the gearbox is sealed. Subsequently, a high-pressure gas source is used to inject high-pressure gas into the gearbox through the oil drain hole sealing column 33, thereby achieving automated airtightness testing of the gearbox.

[0025] In this utility model, "front", "rear", "up", "down", "left", and "right" are all relative positions used to facilitate the description of positional relationships, and therefore cannot be understood as absolute positions as a limitation on the scope of protection.

[0026] Except for the technical features described in the specification, all other technologies are known to those skilled in the art.

[0027] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. For those skilled in the art, several improvements and modifications can be made without departing from the concept of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A gearbox airtightness auxiliary testing device, characterized in that, The system includes a controller, a high-pressure air source, a first support base, a second support base, an upper vent sealing assembly, a lower sealing assembly, and a left sealing assembly. Both the upper and lower vent sealing assemblies are mounted on the first support base. The upper vent sealing assembly includes an upper half-shaft bore sealing plug, a filler hole sealing post, and a drain hole sealing post. These components are capable of reciprocating up-and-down movement and positioning. The upper half-shaft bore sealing plug seals the upper half-shaft bore on the gearbox, the filler hole sealing post seals the filler hole on the gearbox, and the drain hole sealing post seals the drain hole on the gearbox. The high-pressure air source provides high-pressure airflow to the oil drain hole sealing column. The lower sealing assembly includes a lower half-shaft hole sealing plug, which can move up, down, left, and right and is positioned to seal the lower half-shaft hole on the gearbox. The left sealing assembly is mounted on the second support base and includes a vent hole sealing column, which seals the vent hole on the gearbox and can move left, right, up, and down and is positioned to seal the vent hole. The controller controls the operation of the high-pressure air source, the upper vent sealing assembly, the lower sealing assembly, and the left sealing assembly.

2. The gearbox airtightness auxiliary testing device according to claim 1, characterized in that, The upper vent sealing assembly includes a first linear reciprocating motion mechanism and a first movable seat. The first linear reciprocating motion mechanism is mounted on the first support seat and can drive the first movable seat to move up and down and be positioned. Three top pressure rods are fixedly and vertically mounted at the bottom of the first movable seat. The upper half shaft hole sealing plug, the oil filling hole sealing column, and the oil drain hole sealing column are respectively fixedly mounted at the bottom of the three top pressure rods. The oil drain hole sealing column is hollow inside. A first connector communicating with the inside is provided on the upper side wall of the oil drain hole sealing column. An air outlet communicating with the inside is provided at the bottom of the oil drain hole sealing column.

3. The gearbox airtightness auxiliary testing device according to claim 2, characterized in that, A first photoelectric detection switch and a second photoelectric detection switch are provided on the first support base. Both the first photoelectric detection switch and the second photoelectric detection switch are electrically connected to the controller. The first photoelectric detection switch is used to realize the lower limit detection of the first moving base, and the second photoelectric detection switch is used to realize the upper limit detection of the first moving base.

4. The gearbox airtightness auxiliary testing device according to claim 3, characterized in that, The lower sealing assembly includes a second linear reciprocating motion mechanism, a second movable seat, a third linear reciprocating motion mechanism, and a third movable seat. The second movable seat is mounted on the first support seat. The second linear reciprocating motion mechanism is used to drive the second movable seat to perform up-and-down reciprocating motion and positioning. The third movable seat is mounted on the second movable seat. The third linear reciprocating motion mechanism is used to drive the third movable seat to perform left-and-right reciprocating motion and positioning. The lower half-shaft hole sealing plug is fixedly mounted on the upper left side of the third movable seat.

5. The gearbox airtightness auxiliary testing device according to claim 4, characterized in that, The left sealing assembly includes a fourth linear reciprocating motion mechanism and a fifth linear reciprocating motion mechanism. The fourth linear reciprocating motion mechanism is mounted on the second support base. The fourth linear reciprocating motion mechanism is used to realize the up-and-down movement and positioning of the fifth linear reciprocating motion mechanism. The fifth linear reciprocating motion mechanism is used to drive the left-and-right movement and positioning of the vent sealing column.

6. The gearbox airtightness auxiliary testing device according to claim 5, characterized in that, The first linear reciprocating motion mechanism, the second linear reciprocating motion mechanism, the third linear reciprocating motion mechanism and the fifth linear reciprocating motion mechanism are all cylinders.

7. The gearbox airtightness auxiliary testing device according to claim 6, characterized in that, The fourth linear reciprocating motion mechanism is a lead screw linear transmission mechanism.

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