CN220794565U - Large-scale speed reducer case gas tightness detection device - Google Patents

Abstract

The application relates to the technical field of air tightness detection devices, in particular to an air tightness detection device of a large-sized speed reducer box, which comprises a detection table used for placing a speed reducer box to be detected, wherein the upper end surface of the detection table is provided with two oppositely arranged first electric cylinders used for jacking a main-stage bearing hole of the speed reducer box to be detected, the telescopic end of each first electric cylinder is provided with a first pressing plate, and one opposite side of each first pressing plate is convexly provided with an additional jacking component used for jacking a secondary-stage bearing hole of the speed reducer box to be detected; a pressing mechanism for pressing an upper opening of the speed reducer box to be tested is arranged above the detection table; the upper end surface of the detection table is provided with a clamping mechanism for jacking two ports of the speed reducer box body to be detected. The first clamp plate, the pressing mechanism and the clamping mechanism of the two first electric cylinders are used for jointly fixing the box body, sealing the main-stage bearing hole, the upper opening and the two ports, and then adjusting the additional pressing component to abut against the secondary bearing hole, so that the sealing problem of the secondary bearing hole of the multi-stage speed reducer box body is solved.

Description

Large-scale speed reducer case gas tightness detection device

Technical Field

The application relates to the technical field of air tightness detection devices, in particular to an air tightness detection device for a large-sized speed reducer case.

Background

The speed reducer is an independent closed transmission device between the prime motor and the working machine and is used for reducing the rotating speed and increasing the torque so as to meet the working requirement. The reduction gearbox is a part of a speed reducer and is a container for loading transmission parts, shafts and bearings. At present, when the speed reducer is used, lubricant is required to be injected into the speed reducer box to help the working gear inside the box body to lubricate, so the speed reducer box is required to have tightness so as to prevent the lubricant inside the box body from leaking, and the speed reducer is ensured to be in a lubrication environment meeting the stable operation for a long time.

The existing air tightness detection method generally adopts the steps that the external opening of the speed reducer box is totally closed, the air pipe and the pressure measuring pipe of the air tightness detector are connected into an air passage communicated with the inside of the box, high-pressure air is introduced into the box through the air pipe, and the pressure measuring pipe monitors the air pressure change in the box to judge the air tightness of the speed reducer box. The bearing holes on two side surfaces of the speed reducer box, the ports on two end surfaces and the upper opening are respectively pressed and sealed by the pressing plates from the three orthogonal axial directions X, Y, Z, so that the inside of the speed reducer box is sealed, the speed reducer box is fixed on a detection table, and the speed reducer box is detected by an airtight detector.

In the related art scheme, the inventor finds that at least the following problems exist: there are a large number of multistage reducing boxes on the market, there are multistage bearing holes in its both sides, and the bearing hole opening at every stage is in the different protruding heights of reducing box homonymy, and the clamp plate can only block the main level bearing hole that the protrusion is highest, and be located other secondary bearing holes more inside than main level bearing hole, conventional solution is alone sealed it, so not only has increaseed the work load of detection and has lost automatic advantage, but also can't guarantee that sealing effect at every turn is unanimous, has increased test error factor.

Disclosure of Invention

In order to solve the problem of the sealing of the speed reducer box body with the structure, the detection condition of automatic low error is achieved, and the application provides a large-scale speed reducer box air tightness detection device which adopts the following technical scheme:

the large-scale speed reducer box air tightness detection device comprises a detection table for placing a speed reducer box to be detected, wherein the upper end surface of the detection table is provided with two oppositely arranged first electric cylinders for propping up a main-stage bearing hole of the speed reducer box to be detected, the telescopic end of each first electric cylinder is provided with a first pressing plate, and one opposite side of each first pressing plate is convexly provided with an additional propping assembly for propping up a secondary bearing hole of the speed reducer box to be detected;

a pressing mechanism for pressing an upper opening of the speed reducer box to be tested is arranged above the detection table;

and the upper end surface of the detection table is provided with clamping mechanisms for jacking two ports of the speed reducer box body to be detected.

Through adopting above-mentioned technical scheme, the first clamp plate of two first electronic cylinders, push down mechanism and clamp the installation mechanism and jointly will await measuring the speed reducer box and firmly fix on the detection platform, also seal box main level bearing hole, last opening and both ends mouth simultaneously. To the same side of multistage speed reducer box existence multistage bearing hole, and the condition that secondary bearing hole protrusion height is less than main level bearing hole, promote first clamp plate butt and wait to survey the speed reducer box at first electronic cylinder after, through the secondary bearing hole of additional roof pressure subassembly butt, realized the sealing problem of gas tightness detection device to multistage speed reducer box secondary bearing hole.

Optionally: the additional jacking component comprises a jacking part for abutting against a secondary bearing hole of the reducer body to be tested and an adjusting part for adjusting the length of the jacking part protruding out of the first pressing plate.

By adopting the technical scheme, the length of the protruding first pressing plate of the jacking part can be lengthened or shortened by the adjusting part, so that secondary bearing holes with different height differences from the primary bearing holes are adapted to perform jacking sealing. And is not limited to detection of a speed reducer box.

Optionally: the adjusting part comprises an outer rod vertically arranged on the first pressing plate and an inner rod in threaded connection with the outer rod;

the top pressing part is a top pressing plate vertically connected with one end of the inner rod.

Through adopting above-mentioned technical scheme, after the main level bearing hole of homonymy first clamp plate butt test speed reducer box, and then rotatory interior pole is adjusted to protrude in the length of first clamp plate, makes the secondary bearing hole of top clamp plate compress tightly the speed reducer box that awaits measuring, realizes the top pressure seal.

Optionally: the adjusting part comprises an outer rod vertically arranged on the first pressing plate, an inner rod penetrating through the outer rod, and a spring for pushing the inner rod relative to the outer rod in a direction away from the adjacent first electric cylinder;

the top pressing part is a top pressing plate vertically connected with one end of the inner rod.

Through adopting above-mentioned technical scheme, after the main level bearing hole of homonymy first clamp plate butt test speed reducer box, the top pressure board is under the pressure that the butt test speed reducer box secondary bearing hole applyed, drives interior pole and outwards retract in the pole, utilizes the elasticity and the pressure of spring to fight, makes interior pole support top pressure board compress tightly sealed secondary bearing hole.

Optionally: the outer rod is clamped with the first pressing plates, a plurality of mounting holes used for clamping the outer rod are formed in the two first pressing plates, the edge of each mounting hole is far away from the adjacent first electric cylinder to form a circular arc-shaped groove, one end, close to the pressing plate, of each outer rod is provided with a circular arc-shaped protruding block matched with the groove, and the outer rod is in clearance arrangement with the mounting holes.

By adopting the technical scheme, the outer rod is inserted into the mounting hole from one side of the first pressing plate away from the adjacent first electric cylinder, and the arc-shaped protruding block of the outer rod is embedded into the arc-shaped groove, so that the quick mounting of the additional jacking component can be completed; and the outer rod and the mounting hole are arranged in a clearance way, and the outer rod can swing at a certain angle in the mounting hole along with the rotation of the circular arc-shaped convex blocks in the circular arc-shaped grooves, so that the pressing plate is driven to finely adjust the direction of the pressing plate, and the secondary bearing hole is better abutted and sealed. The mode of grafting is convenient simultaneously to tear additional roof pressure subassembly down, avoids producing the interference with the speed reducer box that awaits measuring in some detection scenes that need not to use additional roof pressure subassembly, influences detection device's use. And a plurality of mounting holes are arranged and correspond to the positions of the secondary bearing holes of the speed reducer boxes of different models respectively, and the additional jacking components are inserted into the corresponding mounting holes so as to realize forward jacking, so that a better sealing effect is formed, and the test error is reduced.

Optionally: the clamping mechanism comprises a fixed plate vertically arranged on the upper end face of the detection table and a second electric cylinder arranged opposite to the fixed plate, and a second pressing plate is arranged at the telescopic end of the second electric cylinder;

and the detection table is provided with a lifting structure for adjusting the height of the second electric cylinder from the upper end surface of the detection table.

By adopting the technical scheme, one port of the speed reducer box to be tested is tightly attached to the fixed plate, the lifting structure is operated to adjust the second electric cylinder to a proper height, so that the central position of the second pressing plate corresponds to the central height of the port, the second pressing plate applies force to the port more uniformly, the second electric cylinder is operated to enable the second pressing plate to abut against the port to tightly press the speed reducer box to be tested on the fixed plate, and the sealing effect is improved; the fixed plate is used as a reference for placing the position of the box body of the speed reducer to be measured, so that the placing position is relatively determined, and the adjustment of the pressing mechanism, the clamping mechanism and the two first electric cylinders is reduced.

Optionally: the two electric cylinders are double-shaft cylinders, the double-shaft cylinders are connected with the first pressing plate or the second pressing plate through two telescopic rods, and reinforcing plates are fixedly connected between the telescopic rods of the double-shaft cylinders.

By adopting the technical scheme, the two telescopic rods connected with the first pressing plate or the second pressing plate disperse the thrust of the double-shaft air cylinder to the two connecting points to form two-point support, the pressure applied by the first pressing plate or the second pressing plate to the box body of the speed reducer to be tested is more uniform, the sealing effect is improved, and the test error is reduced; meanwhile, the stability of the box body of the speed reducer to be detected is kept high. The reinforcing plate can effectively solve the problem of strength weakening of the telescopic rod caused by the increase of the extension length, and improves the anti-torsion and side load resistance.

Optionally: ball bowl-shaped universal joints are arranged between the two telescopic rods of each double-shaft air cylinder and the first pressing plate or the second pressing plate which are connected, and the two telescopic rods of each double-shaft air cylinder are arranged in the vertical direction.

By adopting the technical scheme, the spherical part of the spherical bowl-shaped universal joint rotates in the bowl-shaped part, and the first pressing plate or the second pressing plate can rotate relative to the telescopic rod so as to adjust the angle; the two telescopic rods of each double-shaft air cylinder are arranged side by side in the vertical direction, so that the connected first pressing plate or second pressing plate can only rotate horizontally by taking the connecting line direction of the connecting points of the two universal joints as an axis, and the two telescopic rods are always vertical, thereby being beneficial to abutting with the box body of the speed reducer to be tested; when the double-shaft cylinder starts, the two telescopic rods extend out respectively, after the first pressing plate or the second pressing plate contacts the speed reducer box to be tested, the telescopic rods continue to push, the first pressing plate or the second pressing plate rotates through the universal joint to enable the first pressing plate or the second pressing plate to be attached to the speed reducer box to be tested more tightly, sealing is not tight due to the angle of the speed reducer box self structure or the angle generated by surface flaws of a piece to be tested, and testing errors are reduced.

Optionally: the air tightness detection device further comprises an isolation structure for avoiding collision with the box body of the speed reducer to be detected.

Through adopting above-mentioned technical scheme, two first clamp plates, pushing down mechanism and clamping mechanism and the speed reducer box direct contact that awaits measuring, the wearing and tearing will probably produce after the repetitious usage, cause sealed effect to descend, add isolation structure can avoid with the speed reducer box direct contact that awaits measuring, eliminate the influence that the collision brought, reduce detection error.

Optionally: the isolating structure is a plurality of sealing covers which are respectively used for covering main-stage bearing holes, secondary-stage bearing holes, ports and upper openings of the speed reducer box to be detected and are in shape adaptation, a gasket is arranged on the inner side of each sealing cover, an air passage which extends to the inner side of each sealing cover and penetrates through the gasket is formed in the outer peripheral side of each sealing cover, at least two air passages are formed in each sealing cover, and air valves are arranged at one ends of the outer peripheral sides of the air passages.

By adopting the technical scheme, the sealing cover is firstly covered at the opening of the speed reducer box to be detected, then the speed reducer box to be detected is pressed on the sealing cover through the two first pressing plates, the pressing mechanism and the clamping mechanism, and the gasket is arranged at the inner side of the sealing cover, so that the speed reducer box to be detected has better air tightness, and the detection error is reduced; the air channel is provided with the air valve at one end of the peripheral side of the sealing cover, so that the sealing can be ensured, and the air pipe and the pressure measuring pipe of the airtight detector are conveniently connected into the air channel respectively; and the air passage opening is arranged on the outer peripheral side of the sealing cover, so that interference can not be generated to the jacking operation of the two first pressing plates, the pressing mechanism and the clamping mechanism.

In summary, the present application has the following beneficial effects:

1. by arranging the additional jacking component on the first pressing plate, the secondary bearing hole of the speed reducer box to be tested is subjected to jacking sealing, so that the problem of automatic sealing of the multi-stage speed reducer box is solved, the detection steps are simplified, and the detection efficiency is improved;

2. each double-shaft air cylinder pushes the first pressing plate or the second pressing plate through two telescopic rods, so that the pressure applied on the surface of the speed reducer box body to be tested is more uniform, the sealing effect is improved, the testing error is reduced, the inclination angles of the first pressing plate, the second pressing plate and the top pressing plate are adjustable, and the fitting tightness is further improved;

3. a plurality of mounting holes are formed in the two first pressing plates, and the additional pressing components are inserted into the different mounting holes, so that the pressing plates can deal with secondary bearing holes at different positions, and the method is suitable for detecting the air tightness of the speed reducer box bodies of various types;

4. the main-stage bearing hole, the secondary bearing hole, the port and the upper opening of the box body of the speed reducer to be detected are provided with the sealing covers with the matched cover shapes, so that abrasion caused by collision in repeated detection of the two first pressing plates, the pressing mechanism and the clamping mechanism can be avoided, the sealing effect can be further improved through the gasket arranged on the inner side of the sealing cover, and the detection error is reduced.

Drawings

Fig. 1 is a schematic diagram of the overall structure of the large-sized speed reducer case air tightness detection device in embodiment 1;

fig. 2 is a schematic view of the clamping mechanism and the lifting structure thereof in embodiment 1, showing the positional relationship between the second electric cylinder and the fixing plate, and the specific configuration of the lifting structure;

fig. 3 is a schematic structural view of the first electric cylinders in embodiment 1, showing the positional relationship of the two first electric cylinders;

fig. 4 is a schematic structural view of the pressing mechanism in embodiment 1;

fig. 5 is a sectional view of the biaxial cylinder in embodiment 1 showing the internal structure of the universal joint;

FIG. 6 is an exploded view of the first platen and the additional press assembly of example 1, showing the specific configuration of the additional press assembly and mounting hole recesses;

fig. 7 is an exploded view of the speed reducer box to be tested and each seal cover in embodiment 1, showing the specific structure of the speed reducer box to be tested and the arrangement of the seal covers;

FIG. 8 is a cross-sectional view of the seal cap with the air passage formed in example 1, showing the arrangement of the gasket, the air passage and the air valve;

fig. 9 is an exploded view of the first platen and the additional pressing assembly in example 2, showing a specific configuration of the additional pressing assembly.

In the figure, 100, the detection stage; 110. a mounting frame; 200. the speed reducer box body to be tested; 210. a primary bearing bore; 220. a secondary bearing hole; 230. an upper opening; 240. a port; 300. a first electric cylinder; 310. a first platen; 311. a mounting hole; 312. a groove; 320. an additional pressing assembly; 321. an outer rod; 322. an inner rod; 323. a top pressing plate; 324. a spring; 325. a bump; 326. an end cap; 330. a telescopic rod; 331. a reinforcing plate; 332. a universal joint; 333. a spherical portion; 334. a bowl; 400. a pressing mechanism; 410. a single-shaft electric cylinder; 420. a top plate; 500. a clamping mechanism; 510. a fixing plate; 520. a second electric cylinder; 530. a second pressing plate; 540. a lifting structure; 541. a bracket; 542. a screw rod; 543. shaking wheel; 544. a slide rail; 600. sealing cover; 610. a gasket; 620. an airway; 630. and (3) a valve.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

In the description of the present application, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

Example 1:

referring to fig. 1, fig. 1 is a schematic diagram of the overall structure of a large-sized reducer case air tightness detection device according to the present embodiment, for convenience of description, taking a rectangular parallelepiped detection table 100 as an example, and defining the width direction of the detection table 100 as the X axis; the length direction of the detection table 100 is the Y axis; the height direction of the inspection stage 100 is the Z axis. It is understood that the detection table 100 may be any shape structure capable of satisfying the placement of the large-sized reducer case air tightness detection device, and the following description using a coordinate system is only a reference for the relative positions of the parts, and the coordinate system setting of the large-sized reducer case air tightness detection device may be flexibly set according to specific actual needs.

As shown in fig. 1, a large-sized speed reducer case air tightness detection device includes a detection table 100.

Referring to fig. 2, a fixing plate 510 perpendicular to the X axis is vertically provided on the upper end surface of the inspection table 100, and a second electric cylinder 520 is provided in a direction facing the fixing plate 510.

Referring to fig. 3, two first electric cylinders 300 are oppositely disposed on the inspection table 100 along the Y-axis direction.

Referring to fig. 4, a pressing mechanism 400 is provided above the inspection stage 100 along the Z-axis by the mounting bracket 110. The pressing mechanism 400 is any structure capable of providing a pressing force along the Z axis, and illustratively, the pressing mechanism 400 in this embodiment is a single-shaft electric cylinder 410 vertically and downwardly disposed on the mounting frame 110, and a top plate 420 connected to the telescopic end of the single-shaft electric cylinder 410.

The first and second electric cylinders 300 and 520 are biaxial cylinders having two telescopic rods 330, each biaxial cylinder being provided in a posture in which the two telescopic rods 330 are arranged in the vertical direction. A reinforcing plate 331 is fixedly connected between the two telescopic rods 330 of the double-shaft cylinder, and the two telescopic rods 330 penetrate through the reinforcing plate 331 and are perpendicular to the reinforcing plate 331.

Referring to fig. 5, the ends of the telescopic rod 330 are each provided with a ball-and-bowl-shaped universal joint 332, and the ball-shaped portion 333 of the universal joint 332 is half-wrapped by the bowl-shaped portion 334, which can rotate relative to each other, so that one end connected to the ball-shaped portion 333 can rotate relative to one end connected to the bowl-shaped portion 334. The two telescopic rods 330 of the first electric air cylinders 300 are respectively connected with a first pressing plate 310 through universal joints 332, and in combination with fig. 6, a plurality of installing holes 311 corresponding to each other are formed in the two first pressing plates 310 of the two first electric air cylinders 300, and in this embodiment, three installing holes 311 are formed in each first pressing plate 310.

As shown in fig. 6, the first pressing plate 310 is provided with an additional pressing assembly 320, and the additional pressing assembly 320 includes an inner rod 322 with a thin end and a thick end, a hollow outer rod 321 sleeved outside the inner rod 322, and a spring 324 disposed in the outer rod 321. The thin end of the inner rod 322 is provided with threads and is connected with a pressing plate 323 through threads; the two ends of the outer rod 321 are respectively provided with openings which are matched with the thickness of the two ends of the inner rod 322, and the thick opening end is provided with an end cap 326 which is in threaded connection. During installation, the thin end of the inner rod 322 is firstly installed from the thick end of the outer rod 321, the thin end of the inner rod 322 extends out from the thin end of the outer rod 321, the thick end of the inner rod 322 is propped against the thin end of the outer rod 321, then the spring 324 is installed from the thick end of the outer rod 321, the end cap 326 is screwed, the two ends of the spring 324 are respectively propped against the end cap 326 and the thick end of the inner rod 322 and are in a compressed state, and finally the pressing plate 323 is screwed on the thin end of the inner rod 322.

The additional pressing assembly 320 is inserted into the mounting hole 311, and the outer rod 321 is disposed in the mounting hole 311 with a gap. The opposite sides of the two first pressing plates 310 are provided with circular arc grooves 312 at the edges of the mounting holes 311, and circular arc protruding blocks 325 matched with the grooves 312 are arranged at the thin opening ends of the outer rods 321, so that the protruding blocks 325 can rotate in the grooves 312.

As shown in fig. 2, the two telescopic rods 330 of the second electric cylinder 520 are respectively connected with a second pressing plate 530 through universal joints 332.

The detecting table 100 is provided with a lifting structure 540 for adjusting the height of the second electric cylinder 520, and the lifting structure 540 may be any means capable of carrying the lifting of the second electric cylinder 520. Illustratively, the lifting structure 540 in this embodiment includes a bracket 541 fixed to the detection table 100, a screw rod 542 threaded to an upper portion of the second electric cylinder 520 through the bracket 541 from above, and a rocking wheel 543 connected to an end of the screw rod 542, and a sliding rail 544 for guiding the second electric cylinder 520 to lift is provided inside the bracket 541.

As shown in fig. 7, a large-sized speed reducer box air tightness detecting device further includes a sealing cover 600 that is capped at the outside of the speed reducer box 200 to be detected.

The sealing cover 600 is a plurality of cover-shaped structures which are matched with the shapes and the sizes of the main-stage bearing hole 210, the secondary bearing hole 220, the upper opening 230 and the port 240 of the reducer box 200 to be tested, and the first pressing plate 310, the top pressing plate 323, the second pressing plate 530 and the top plate 420 are respectively abutted against the sealing cover 600.

As shown in fig. 8, a gasket 610 is provided at the inner side of the sealing cover 600, and the gasket 610 is made of a material such as metal, plastic, rubber, polytetrafluoroethylene, graphite, etc. having a certain elasticity, a low friction coefficient, and aging resistance. Each seal cap 600 inboard washer 610 abuts the primary bearing bore 210, the secondary bearing bore 220, the upper opening 230 and the port 240.

The outer peripheral side of the sealing cover 600 is provided with air passages 620 extending to the inner side of the sealing cover 600 and penetrating through the gasket 610, and at least two air passages 620 are provided on the plurality of sealing covers 600, and the present embodiment is exemplified by providing two air passages 620. The two air passages are respectively butted with the air pipe and the pressure measuring pipe of the airtight detector.

The air passages 620 are each provided with a valve 630 at one end of the outer circumferential side of the sealing cover 600.

Working principle:

firstly, two ports 240 of the to-be-measured speed reducer box 200 are approximately placed on the detection table 100 along the Y-axis direction, the primary bearing hole 210 and the secondary bearing hole 220 along the X-axis direction, and the upper opening 230 is approximately placed on the fixing plate 510 along the Z-axis direction, and the ports 240 are tightly attached to the fixing plate 510, so that the to-be-measured speed reducer box 200 is positioned right under the pressing mechanism 400 and between the two first electric cylinders 300.

The optional mating seal cap 600 caps the primary bearing bore 210, secondary bearing bore 220, upper opening 230 and port 240 of the reducer housing 200 under test. And the gas pipe and the pressure measuring pipe of the airtight detecting instrument are respectively butted with the two air valves 630.

Then, two additional pressing assemblies 320 are inserted into the mounting holes 311 of the secondary bearing holes 220 of the reducer box 200 to be tested respectively from opposite sides of the two first pressing plates 310. The second electric cylinder 520 is driven to lift under the guidance of the bracket 541 by rotating the screw rod 542 through the rocking wheel 543, so that the central height of the second pressing plate 530 is approximately equal to the central height of the port 240, the second electric cylinder 520 is started, and the telescopic rod 330 of the second electric cylinder 520 pushes the second pressing plate 530 to abut against the port 240. When a certain included angle exists between the plane of the second pressing plate 530 and the sealing cover 600 abutted against the plane, the second pressing plate 530 rotates relative to one end of the spherical part 333 of the universal joint 332 through one end of the bowl-shaped part 334 of the universal joint 332, so that the second pressing plate 530 is attached to the sealing cover 600 after rotating.

The single-shaft electric cylinder 410 and the two first electric cylinders 300 are activated. The top plate 420 is abutted against the sealing cover 600 of the upper opening 230, and the two first pressing plates 310 are also abutted against the sealing covers 600 of the main stage bearing holes 210 by rotation of the universal joint 332. Meanwhile, the pressing plates 323 of the two additional pressing assemblies 320 are respectively abutted against the sealing covers 600 of the secondary bearing holes 220, and the pressing plates 323 are pressed on the sealing covers 600 by the inner rods 322 under the action of the elastic force of the springs 324. When a certain included angle exists between the plane of the top pressing plate 323 and the sealing cover 600 abutted against the top pressing plate 323, the outer rod 321 of the additional top pressing assembly 320 is arranged in a clearance with the mounting hole 311, and the top pressing plate 323 rotates relative to the groove 312 of the mounting hole 311 through the protruding block 325 of the connected outer rod 321, so that the top pressing plate 323 is attached to the sealing cover 600 after rotating.

Finally, the air tightness detector is started, the air compression pump inputs compressed air into the to-be-detected speed reducer box 200 through the air pipe, the air valve 630 and the air channel 620, and after a certain amount of compressed air is reached, the air tightness of the to-be-detected speed reducer box 200 is judged whether to be qualified or not according to the time-varying condition of air pressure by observing the air pressure value measured by the pressure measuring pipe on the air tightness detector.

Example 2:

unlike embodiment 1, as shown in fig. 9, the additional pressing assembly 320 includes an inner rod 322 and a hollow outer rod 321 sleeved outside the inner rod 322. The inner rod 322 is a screw rod in threaded connection with the outer rod 321, and a pressing plate 323 is in threaded connection with one end of the inner rod 322 far away from the adjacent first electric cylinder 300.

Working principle:

before the two additional pressing assemblies 320 are inserted into the mounting holes 311 of the secondary bearing holes 220 of the reducer body 200 to be tested from opposite sides of the two first pressing plates 310, the inner rods 322 are screwed out relative to the outer rods 321 toward the opposite ends where the pressing plates 323 are mounted, so that the pressing plates 323 are abutted against the ends of the outer rods 321 where the protruding blocks 325 are arranged. Followed by the same steps as in example 1.

After the two first electric cylinders 300 are started, the two first pressing plates 310 are respectively abutted against the sealing cover 600 of the primary bearing hole 210, the inner rod 322 is screwed into one end of the mounting pressing plate 323 relative to the outer rod 321, the pressing plates 323 of the two additional pressing assemblies 320 are respectively contacted with the sealing cover 600 of the secondary bearing hole 220, the inner rod 322 is continuously screwed in, and the pressing plates 323 are rotated relative to the grooves 312 of the mounting hole 311 through the protruding blocks 325 of the connected outer rod 321 due to the fact that the outer rods 321 of the additional pressing assemblies 320 are arranged in a clearance mode, and therefore the pressing plates 323 are attached to the sealing cover 600 after being rotated, and are pressed on the sealing cover 600. Followed by the same steps as in example 1.

The embodiments of the present utility model are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in this way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. The utility model provides a large-scale speed reducer case gas tightness detection device, is including being used for placing detection platform (100) of speed reducer case (200) that awaits measuring, its characterized in that: the upper end face of the detection table (100) is provided with two oppositely arranged first electric cylinders (300) for propping up the main-stage bearing holes (210) of the speed reducer box (200) to be detected, the telescopic end of each first electric cylinder (300) is provided with a first pressing plate (310), and one opposite side of each first pressing plate (310) is provided with an additional propping component (320) in a protruding mode for propping up the secondary-stage bearing holes (220) of the speed reducer box (200) to be detected;

a pressing mechanism (400) for pressing an upper opening (230) of the speed reducer box (200) to be detected is arranged above the detection table (100);

the upper end face of the detection table (100) is provided with a clamping mechanism (500) for jacking two ports (240) of the speed reducer box (200) to be detected.

2. The large-sized speed reducer case air tightness detection device according to claim 1, wherein: the additional jacking component (320) comprises a jacking part for abutting against a secondary bearing hole (220) of the reducer box (200) to be tested and an adjusting part for adjusting the length of the jacking part protruding out of the first pressing plate (310).

3. The large-sized speed reducer case air tightness detection device according to claim 2, wherein: the adjusting part comprises an outer rod (321) vertically arranged on the first pressing plate (310), and an inner rod (322) in threaded connection with the outer rod (321);

the top pressing part is a top pressing plate (323) vertically connected with one end of the inner rod (322).

4. The large-sized speed reducer case air tightness detection device according to claim 2, wherein: the adjusting part comprises an outer rod (321) vertically arranged on the first pressing plate (310), an inner rod (322) penetrating through the outer rod (321), and a spring (324) for pushing the inner rod (322) relative to the outer rod (321) in a direction away from the adjacent first electric cylinder (300);

the top pressing part is a top pressing plate (323) vertically connected with one end of the inner rod (322).

5. The large-sized speed reducer case air tightness detection device according to claim 3 or 4, wherein: the outer rod (321) with first clamp plate (310) joint, two all be provided with a plurality of being used for the joint on first clamp plate (310) mounting hole (311) of outer rod (321), the edge of mounting hole (311) is keeping away from adjacently one side of first electronic cylinder (300) forms convex recess (312), outer rod (321) be close to the one end setting of top clamp plate (323) with convex lug (325) that recess (312) match, just outer rod (321) with mounting hole (311) clearance setting.

6. The large-sized speed reducer case air tightness detection device according to claim 5, wherein: the clamping mechanism (500) comprises a fixed plate (510) vertically arranged on the upper end face of the detection table (100) and a second electric cylinder (520) arranged opposite to the fixed plate (510), and a second pressing plate (530) is arranged at the telescopic end of the second electric cylinder (520);

the detection table (100) is provided with a lifting structure (540) for adjusting the height of the second electric cylinder (520) from the upper end surface of the detection table (100).

7. The large-sized speed reducer case air tightness detection device according to claim 6, wherein: two first electronic cylinder (300) with second electronic cylinder (520) are biax cylinder, biax cylinder passes through two telescopic links (330) are connected first clamp plate (310) or second clamp plate (530), each biax cylinder's two fixedly connected with reinforcing plate (331) between telescopic link (330).

8. The large-sized speed reducer case air tightness detection device according to claim 7, wherein: a spherical bowl-shaped universal joint (332) is arranged between the two telescopic rods (330) of each double-shaft air cylinder and the first pressing plate (310) or the second pressing plate (530) which are connected, and the two telescopic rods (330) of each double-shaft air cylinder are arranged in the vertical direction.

9. The large-sized speed reducer case air tightness detection device according to claim 1, wherein: the air tightness detection device further comprises an isolation structure for avoiding collision with the box body (200) of the speed reducer to be detected.

10. The large-sized speed reducer case air tightness detection device according to claim 9, wherein: the utility model discloses a speed reducer box (200) is used for sealing lid (600) of the shape looks adaptation of a plurality of bearing holes (210), secondary bearing hole (220), port (240) and upper shed (230) of being used for respectively to be covered at the speed reducer box (200) that awaits measuring, sealed lid (600) inboard is equipped with packing ring (610), sealed lid (600) periphery side is offered and is extended to sealed lid (600) inboard and run through air flue (620) of packing ring (610), a plurality of have at least two on sealed lid (600) air flue (620), air flue (620) are in sealed lid (600) periphery side's one end all is provided with valve (630).