Air tightness test device for speed reducer

Abstract

The utility model relates to the technical field of air tightness testing equipment for speed reducers, and particularly discloses an air tightness testing device for a speed reducer, which comprises a sealing cover in sealing connection with the speed reducer, and the sealing cover is provided with a detection hole; the device further comprises an inner pipe, an outer pipe, a sealing seat, a pressure detection piece and an air source. The lower end of the outer pipe extends into the detection hole. The inner pipe coaxially penetrates through the outer pipe in a sliding manner; one end of the outer tube in the detection hole is hinged with a plurality of lock heads, and one end of the inner tube in the detection hole is provided with a conical head; the inner pipe is driven to move towards the outer side of the detection hole in the outer pipe, and the tapered heads are expanded towards the periphery through the conical heads, so that the plurality of tapered heads abut against the end part of the detection hole; the sealing seat is sleeved on the outer pipe, is positioned on the outer side of the detection hole and is used for sealing a gap between the outer pipe and the detection hole; the inner pipe is connected with an air source through an air pipe, and the pressure detection piece is arranged on the air pipe. The problems of tedious steps, low efficiency, inaccurate pressure control and the like of a traditional mode of connecting an air pipe and a pressure gauge through threads are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to airtightness detection equipment technical field for speed reducer, specifically, a kind of airtightness test device for speed reducer. BACKGROUND

[0002] Rotary reducer is the core component of excavator, rotary reducer adopts traditional gear transmission, and a large amount of gear oil is needed for lubrication to ensure the normal operation of the speed reducer during operation. When the speed reducer is shipped, air tightness test is needed to avoid the risk of gear oil leakage.

[0003] The traditional air tightness test adopts air inlet pipe and pressure gauge connected with the speed reducer cavity respectively, and then a certain gas is pumped and the pressure change is detected. The air inlet pipe and the pressure gauge are respectively connected with the speed reducer by screw thread. This connection mode causes the test procedure to be complicated and the test efficiency to be low. And the amount of gas filled is judged by pressure gauge reading, it is difficult to accurately control the air pressure in the speed reducer, often leading to unsatisfactory test results. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of airtightness test device for speed reducer, which solves the problems of traditional thread connection air pipe and pressure gauge mode, complicated procedure, low efficiency and inaccurate pressure control.

[0005] The utility model realizes the following technical scheme: a kind of airtightness test device for speed reducer, including the sealing cover connected with the speed reducer, the sealing cover is provided with detection hole communicated with the inner cavity of speed reducer;

[0006] It further includes inner tube, outer tube, sealing seat, pressure detection piece and gas source, the lower end of outer tube extends into the detection hole;The inner tube is coaxially slidably arranged in the outer tube;

[0007] One end of the outer tube located in the detection hole is hinged with a plurality of lock heads, and a plurality of lock heads are arranged in an annular array about the outer tube. The inner tube located in the detection hole is provided with a tapered head, and the small diameter end of the tapered head is connected with the inner tube. The inner tube is driven to move outside the detection hole in the outer tube, and then the tapered head drives a plurality of lock heads to expand outward, so that a plurality of lock heads abut against the end of the detection hole;

[0008] The sealing seat is sleeved on the outer tube and located outside the detection hole, and the sealing seat is used to seal the gap between the outer tube and the detection hole;

[0009] The inner tube is connected with the gas source through the air pipe, and the pressure detection piece is arranged on the air pipe.

[0010] Further, the sealing seat further comprises a sealing washer, the sealing washer is in the shape of a truncated cone, and one end of the sealing washer with a small diameter extends into the detection hole.

[0011] Further, a limiting seat and a spring are further included, the limiting seat and the spring are sleeved on the inner tube, the limiting seat is located on the side of the sealing seat away from the lock head, and the two ends of the spring are respectively in abutment with the limiting seat and the sealing seat.

[0012] Further, the limiting seat is in threaded connection with the inner tube.

[0013] Further, a rubber sealing ring is further included, and the part of the inner tube located in the outer tube is spaced apart from the rubber sealing ring.

[0014] Further, a handle is arranged on the sealing seat, and a buckle is arranged on the limiting seat.

[0015] Further, the pressure detection member is an air tightness detector.

[0016] Further, the pressure detection member is a pressure control valve.

[0017] Further, the air source is an air compressor.

[0018] The technical scheme of the utility model has at least the following advantages and beneficial effects:

[0019] 1. Before detection, first hold the handle, then press the buckle with the thumb, move the inner tube to the side of the lock head, separate the taper head from the plurality of lock heads, and then the plurality of lock heads are separated to form a diameter smaller than the inner diameter of the detection hole, so that the lock head can smoothly pass through the detection hole, after the lock head enters or passes through the detection hole, the thumb can be released, then the sealing washer on the sealing seat is tightly connected with the end of the detection hole by pressing the outer tube through the handle, the gap between the outer tube and the detection hole is sealed, and at the same time, the inner tube moves outward under the action of the spring, drives the plurality of lock heads to overturn outward and abut against the inner end of the detection hole, and the sealing connection between the outer tube, the inner tube and the detection hole is completed.

[0020] 2. After the outer tube and the inner tube are installed in place, a certain pressure of air can be pumped through the air source, the inner tube continues to move outward under the action of the air pressure, the taper head is further abutted against the plurality of lock heads, the handle can be released after the air charging is completed, and then a period of time is observed, whether air leakage is observed through the pressure detection member, so as to judge the air tightness.

[0021] 3. When the detection is completed, only need to hold the handle, press the buckle ring with the thumb, drive the inner tube to move to the inside of the detection hole, and then make the cone head separate from the several lock heads, and then take out the whole outer tube and inner tube from the detection hole through the handle, the installation and disassembly of the whole device are very fast and convenient, greatly improve the work efficiency, and ensure the sealing basis of the air tightness detection.

[0022] 4. The pressure detection piece is an air tightness detector or a pressure control valve, the air pressure in the inner cavity of the speed reducer can be accurately controlled in a predetermined pressure range, there is no overpressure or underpressure to cause inaccurate detection, the overall detection effect after the test is completed reaches the expectation, and meets actual needs. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 A structure schematic view of the air tightness test device for the speed reducer cooperating with the speed reducer is provided in the present application.

[0025] Figure 2 A structure schematic view of the air tightness test device for the speed reducer cooperating with the detection hole is provided in the present application.

[0026] Figure legend: 1, speed reducer, 2, cover, 21, detection hole, 3, inner tube, 31, cone head, 32, rubber sealing ring, 4, outer tube, 41, lock head, 5, sealing seat, 51, sealing gasket, 52, handle, 6, pressure detection piece, 7, air source, 8, air pipe, 9, limiting seat, 91, spring, 92, buckle ring. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0029] Referring to Figures 1 to 2 As shown in the drawings, the present embodiment provides a gas tightness test device for a speed reducer, which comprises a cover 2 sealingly connected with the speed reducer 1. The cover 2 is sealingly connected with the casing of the speed reducer 1 in advance and is fixed with the casing by bolts. The cover 2 is provided with a detection hole 21 communicating with the inner cavity of the speed reducer 1.

[0030] As Figure 2 shown, it further comprises an inner tube 3, an outer tube 4, a sealing seat 5, a pressure detection piece 6 and a gas source 7. The lower end of the outer tube 4 extends into the detection hole 21. The inner tube 3 is coaxially and slidingly arranged through the outer tube 4. More specifically, one end of the outer tube 4 located in the detection hole 21 is hingedly connected with a plurality of lock heads 41. The plurality of lock heads 41 are arranged in an annular array about the outer tube 4. One end of the inner tube 3 located in the detection hole 21 is provided with a tapered head 31. The tapered head 31 is connected with the inner tube 3 at one end with a small diameter. The inner tube 3 is driven to move outside the detection hole 21 in the outer tube 4. Then, the tapered head 31 drives the plurality of lock heads 41 to expand outward, so that the plurality of lock heads 41 abut against the end of the detection hole 21. At this time, the outer tube 4 cannot be pulled out of the detection hole 21.

[0031] At the same time, as Figure 2 shown, the sealing seat 5 is sleeved on the outer tube 4 and located outside the detection hole 21. The sealing seat 5 is used to seal the gap between the outer tube 4 and the detection hole 21. By abutting the plurality of lock heads 41 against the end of the detection hole 21, the outer tube 4 and the inner tube 3 cannot be pulled out of the detection hole 21. In combination with the sealing seat 5 for further sealing, the sealing seat 5 further comprises a sealing gasket 51. The sealing gasket 51 is in the shape of a circular truncated cone. One end of the sealing gasket 51 with a small diameter extends into the detection hole 21. When the outer tube 4 is installed, it needs to be first moved into the detection hole 21 until the sealing gasket 51 on the sealing seat 5 abuts tightly against the detection hole 21. Then, the inner tube 3 is driven to move outward in the outer tube 4. Finally, the plurality of lock heads 41 abut against the detection hole 21 through the tapered head 31, so as to realize the fixed and sealing connection of the outer tube 4 and the inner tube 3 with the detection hole 21.

[0032] More specifically, as Figure 2 shown, it further comprises a rubber sealing ring 32. The part of the inner tube 3 located in the outer tube 4 is spaced apart from the plurality of rubber sealing rings 32. The plurality of rubber sealing rings 32 are mainly used to seal the gap between the inner tube 3 and the outer tube 4, so as to prevent gas leakage.

[0033] As Figure 2Also shown, further comprising a limiting seat 9 and a spring 91, both of which are sleeved on the inner tube 3, the limiting seat 9 is located on the side of the sealing seat 5 away from the lock head 41, and the two ends of the spring 91 abut against the limiting seat 9 and the sealing seat 5 respectively. In specific implementation, the sealing seat 5 is provided with a handle 52, and the limiting seat 9 is provided with a buckle ring 92. Before detection, first hold the handle 52, and then use the thumb to buckle the buckle ring 92, so that the inner tube 3 moves to the side of the lock head 41, and then the taper head 31 is separated from the plurality of lock heads 41, and then the diameter surrounded by the plurality of lock heads 41 is smaller than the inner diameter of the detection hole 21, so that the lock head 41 can smoothly pass through the detection hole 21. After the lock head 41 enters or passes through the detection hole 21, the thumb can release the buckle ring 92, and then the sealing gasket 51 on the sealing seat 5 is tightly butted against the end of the detection hole 21 by pressing the outer tube 4 through the handle 52, thereby sealing the gap between the outer tube 4 and the detection hole 21. At the same time, under the action of the spring 91, the inner tube 3 moves outward, drives the plurality of lock heads 41 to flip outward and abut against the inner end of the detection hole 21, and the sealing connection of the outer tube 4 and the inner tube 3 with the detection hole 21 is completed.

[0034] More specifically, as shown in Figure 1 and Figure 2 , the inner tube 3 is connected with the air source 7 through the air pipe 8, the air source 7 is an air compressor, and the pressure detection piece 6 is arranged on the air pipe 8. After the outer tube 4 and the inner tube 3 are installed in place, a certain pressure of air can be pumped into the air source 7, which drives the inner tube 3 to continue to move outward under the action of air pressure, further abutting the taper head 31 and the plurality of lock heads 41. After the inflation is completed, the handle 52 can be released, and then observed for a period of time to observe whether there is air leakage through the pressure detection piece 6.

[0035] When the detection is completed, only the handle needs to be held, the buckle ring 92 is pressed down with the thumb, the inner tube 3 is driven to move inward of the detection hole 21, the taper head 31 is separated from the plurality of lock heads 41, and then the entire outer tube 4 and inner tube 3 are taken out of the detection hole 21 through the handle 52. The installation and disassembly of the entire device are very fast and convenient, greatly improving the work efficiency, and ensuring the sealing basis of the air tightness detection.

[0036] More specifically, as shown in Figure 2 , the limiting seat 9 is threadedly connected with the inner tube 3, so that the extension amount of the spring 91 can be adjusted, and the spring force of the spring 91 can be adjusted as needed. The spring force acts on the inner tube 3 and the outer tube 4 respectively, mainly abutting the taper head 31 and the lock head 41 tightly, and ensuring the stable connection of the whole with the detection hole 21.

[0037] As one of the embodiments, the pressure detecting member 6 is a gas tightness detector, which is communicated with the inner cavity of the speed reducer 1 through the air pipe 8 and the inner pipe 3, can actively pump gas into the inner cavity of the speed reducer 1 and monitor the change of the pressure, and then displays the pressure value on the display screen. After the compressed air is input, if the pressure value does not change, the gas tightness is good, otherwise, the gas tightness is problematic.

[0038] As another embodiment, the pressure detecting member 6 is a pressure control valve, which can control the gas pumped into the inner cavity of the speed reducer, stop when the set pressure is reached, and monitor the change of the internal pressure to determine whether the gas tightness of the speed reducer 1 is qualified.

[0039] In summary, the air pressure in the inner cavity of the speed reducer 1 can be accurately controlled within a predetermined pressure range, and there is no overpressure or underpressure to cause inaccurate detection. The overall detection effect after the test is completed reaches the expectation and meets the actual needs.

[0040] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A kind of air-tightness test device for speed reducer, including the cover (2) of sealed connection with speed reducer (1), the cover (2) is provided with the detection hole (21) being communicated with the inner chamber of speed reducer (1); characterized in that Also including inner tube (3), outer tube (4), sealing seat (5), pressure detection piece (6) and air source (7), the lower end of outer tube (4) extends into the detection hole (21);The inner tube (3) is coaxially slid through the outer tube (4); The end of outer tube (4) in the detection hole (21) is hinged with several lock heads (41), and several lock heads (41) are arranged in annular array about the outer tube (4), the end of inner tube (3) in the detection hole (21) is provided with taper head (31), and the small-diameter end of taper head (31) is connected with the inner tube (3);Drive the inner tube (3) to move in the outer tube (4) to the outside of the detection hole (21), then the taper head (31) drives several lock heads (41) to expand outward, so that several lock heads (41) abut with the end of detection hole (21); The sealing seat (5) is sleeved on the outer tube (4) and located outside the detection hole (21), and the sealing seat (5) is used to seal the gap between the outer tube (4) and the detection hole (21); The inner tube (3) is connected with the air source (7) through the air pipe (8), and the pressure detection piece (6) is arranged on the air pipe (8).

2. The air tightness testing device for a speed reducer according to claim 1, characterized by The sealing seat (5) further includes sealing washer (51), and the sealing washer (51) is in the shape of circular truncated cone, and the small-diameter end of the sealing washer (51) extends into the detection hole (21).

3. The air tightness testing device for a speed reducer according to claim 2, characterized by Further including limiting seat (9) and spring (91), the limiting seat (9) and spring (91) are both sleeved on the inner tube (3), the limiting seat (9) is located on the side of the sealing seat (5) away from the lock head (41), and the two ends of the spring (91) respectively abut with the limiting seat (9) and the sealing seat (5).

4. The air tightness testing device for a speed reducer according to claim 3, characterized by The limiting seat (9) is threadedly connected with the inner tube (3).

5. The air tightness testing device for a speed reducer according to claim 4, characterized by Further including rubber sealing ring (32), and the inner tube (3) is provided with several rubber sealing rings (32) at intervals in the outer tube (4).

6. The air tightness testing device for a speed reducer according to claim 5, characterized by The sealing seat (5) is provided with a handle (52), and the limiting seat (9) is provided with a buckle ring (92).

7. The air tightness testing device for a speed reducer according to claim 6, characterized by The pressure detection piece (6) is airtightness detector.

8. The air tightness testing device for a speed reducer according to claim 6, characterized by The pressure detection piece (6) is a pressure control valve.

9. The air tightness testing device for a speed reducer according to claim 7 or 8, characterized by The air source (7) is an air compressor.

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