CN210293581U

CN210293581U - Tightness detection device

Info

Publication number: CN210293581U
Application number: CN201921465066.2U
Authority: CN
Inventors: 张庆耀; 田杰; 商建光; 杨双双; 孙建; 张博阳; 陈策
Original assignee: Baoding Great Machinery Co ltd
Current assignee: Baoding Great Machinery Co ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-04-10
Anticipated expiration: 2029-09-04

Abstract

The utility model relates to a leakproofness detection device to constitute the detection to the shift fork groove position gas tightness of shift fork casing, it includes the location portion of fixing a position in the frame to shift fork casing, locates the portion that compresses tightly of shift fork casing top corresponding to the shift fork groove, locates the shutoff portion of shift fork casing one side corresponding to the via hole, and control portion and the portion of aerifing, pressure monitoring portion and the warning portion of being connected with this control portion electricity. The sealing performance detection device of the utility model has the advantages of simple structure, convenient operation and sensitive air tightness detection of the shifting fork shell; in addition, compared with the traditional detection method under the liquid environment, the detection method of the detection device not only facilitates the fixing of the shifting fork shell, but also omits the procedures of wiping water, blowing residual liquid and the like, thereby leading the sealing detection device to have better use effect.

Description

Tightness detection device

Technical Field

The utility model relates to a shift fork casing leakproofness detects technical field, in particular to leakproofness detection device.

Background

The electric control shifting fork assembly is mainly used for realizing the conversion between a four-wheel drive mode and a two-wheel drive mode in the whole vehicle, is matched with a shifting fork sleeve during working, and realizes the four-wheel drive action or the two-wheel drive running of the whole vehicle by controlling the connection and disconnection between the long half shaft and the mechanical wheel. Wherein, the shift fork chamber and the mechanical wheel that form behind automatically controlled shift fork casing and the fork cover cooperation are located the sealing ring, and its inside is filled with lubricating oil, if there is the crack in the shift fork casing and can influence the leakproofness of shift fork assembly to lead to lubricating oil to reveal, and then lead to the frictional force increase, life-span that can greatly reduced shift fork assembly. In the prior art, although the tightness of the shifting fork assembly can be detected, the tightness of the shifting fork groove cannot be detected while the defects of gaps, cracks and the like of the shifting fork shell cannot be detected.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a leakproofness detection device, the gas tightness of its detectable shift fork casing declutch groove department, and simple structure, the operation of being convenient for and can have better detection effect.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a kind of sealing detection device, in order to form the detection to the position gas tightness of the fork slot of the shift fork shell, the said shift fork shell has through hole communicating with said fork slot, in order to allow the fork shaft to pass, the said sealing detection device includes the stander, and locate the detecting element on the said stander, the said detecting element includes locating part to the said shift fork shell position on the said stander, locate the said clamp part above the shell of the said shift fork corresponding to the said fork slot, locate the plugging part of one side of shell of the said shift fork corresponding to the said through hole, and have control division of the timing module, charge department, pressure monitoring department and alarm department that are connected electrically with said control division;

the positioning portion can form a shifting fork cavity with the shifting fork groove surrounding structure due to the positioning of the shifting fork shell, the pressing portion can extend outwards to extrude the extruding end of the shifting fork shell, the blocking portion can extend outwards to block the blocking end of the through hole, a time threshold value is preset by the timing module, a pressure threshold value is preset by the pressure monitoring portion, the control portion is electrically connected with the pressing portion and the blocking portion to control the extruding end and the blocking end to act successively to enable the shifting fork cavity to form a closed cavity, and the pressure monitoring portion is used for monitoring the pressure in the closed cavity.

Further, a switch portion electrically connected with the control portion is arranged on the rack, and the switch portion is configured to output a switch signal to start or stop the control portion due to external triggering.

Furthermore, the compressing part comprises a first air cylinder arranged on the rack, and the extruding end is a pressing block connected with the telescopic end of the first air cylinder through a floating joint.

Furthermore, the pressing block is fixedly connected with a guide post which is arranged on the rack in a sliding mode and used for guiding the movement of the pressing block.

Furthermore, a nylon pad is arranged on the end face of one side, connected with the shifting fork shell, of the pressing block.

Furthermore, the plugging part comprises a second cylinder arranged on the rack, and the plugging end is a plug fixedly arranged at the telescopic end of the second cylinder.

Furthermore, the end part of the plug, which is used for plugging the through hole, is constructed into a conical shape, a sealing ring is sleeved on the plug, and the sealing ring is clamped between the plug and the shifting fork shell due to the plugging of the through hole by the plug.

Furthermore, a protective cover for covering the detection unit is arranged on the rack, a through hole for the shifting fork shell to pass through is formed in the protective cover, and a safety grating electrically connected with the control part is arranged at the through hole.

Furthermore, the detection units are arranged on the rack side by side.

Furthermore, a sealing gasket is arranged on the positioning part, and the sealing gasket is clamped between the positioning part and the shifting fork shell due to the positioning of the shifting fork shell.

Compared with the prior art, the utility model discloses following advantage has:

(1) the sealing performance detection device of the utility model has the advantages of simple structure, convenient operation and sensitive air tightness detection of the shifting fork shell; in addition, compared with the traditional detection method under the liquid environment, the detection method of the detection device not only facilitates the fixing of the shifting fork shell, but also omits the procedures of wiping water, blowing residual liquid and the like, thereby leading the sealing detection device to have better use effect.

(2) The briquetting passes through the flexible end of floating joint connection in first cylinder, can make the briquetting automatic alignment with the extrusion face of shifting fork casing to can improve the extrusion effect to the shifting fork casing.

(3) The guide post is arranged to guide the up-and-down movement of the pressing block, so that the pressing block can be guaranteed to smoothly extrude the shifting fork shell.

(4) Through setting up the nylon pad, can prevent the briquetting because of extrusion shift fork casing fish tail shift fork casing.

(5) The end part of the plug for plugging the through hole is conical, so that the plug can be rapidly inserted into the through hole to plug the through hole.

(6) The safety grating can prevent safety accidents.

(7) The detection unit sets up a plurality ofly, can make this detection device realize the detection to a plurality of shift fork casing gas tightness simultaneously to this detection device's work efficiency can be improved.

(8) The sealing gasket is arranged to be beneficial to improving the sealing performance of the shifting fork cavity, so that the accuracy of detecting the air tightness of the shifting fork shell can be improved.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of a shift fork housing according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a sealing performance detecting apparatus according to an embodiment of the present invention;

fig. 3 is a schematic structural view of the sealing performance detecting apparatus according to the embodiment of the present invention when the supporting frame is removed;

fig. 4 is a front view of the tightness detection device according to the embodiment of the present invention with the support frame removed;

fig. 5 is a left side view of the tightness detection device according to the embodiment of the present invention with the support frame removed;

fig. 6 is a schematic structural view of a positioning plate according to an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a pressing block according to an embodiment of the present invention;

FIG. 8 is an enlarged view of portion I of FIG. 5;

description of reference numerals:

1-a shifting fork shell, 101-a motor groove, 102-a shifting fork groove and 103-a connecting hole;

2-a support frame;

3-positioning plate, 301-groove, 302-inflation hole, 303-mounting hole, 304-positioning hole and 305-through hole;

4-a second cylinder, 5-a nylon pad;

6-briquetting, 601-extruding surface;

7-a guide column, 8-a first cylinder, 9-a bearing frame, 10-a switch button and 11-an emergency stop button;

12-plug, 1201-main body, 1202-plug end;

13-sealing ring, 14-safety grating.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The embodiment relates to a leakproofness detection device to constitute the detection to the declutch shift groove position gas tightness of shift fork casing, wherein, the structure of shift fork casing is similar with prior art, and as shown in figure 1, it includes the motor groove and the declutch shift groove of notch orientation equidirectional not, is formed with the through hole that link up the motor groove and communicate with the declutch shift groove on the shift fork casing, and this through hole is used for supplying the declutch shift axle to wear to establish. The tightness detection device of the present embodiment specifically includes a rack and a plurality of detection units disposed on the rack, and in order to improve the working efficiency, the detection units are disposed side by side on the rack, and as shown in fig. 1 to 4, the detection units in the present embodiment are preferably four detection units disposed side by side on the rack. The specific structure of the detection unit will be described in detail herein by taking only one detection unit as an example.

Specifically, the detection unit of this embodiment includes a positioning portion for positioning the shift fork housing 1 on the rack, a pressing portion disposed above the shift fork housing 1 corresponding to the shift fork groove 102, a blocking portion disposed on one side of the shift fork housing 1 corresponding to the via hole, and a control portion, and an inflation portion, a pressure monitoring portion, and an alarm portion electrically connected to the control portion. As shown in fig. 1, the rack specifically includes a lower supporting frame 2 and an upper supporting frame 9, the supporting frame 9 is provided with a mounting table, the supporting frame 2 and the supporting frame 9 are both frame-type structures, the supporting frame 9 is provided with a not-shown protective cover for covering the detection unit, and a through hole for the shifting fork housing 1 to pass through is formed in the protective cover. The protective cover can be made of an acrylic plate and an aluminum alloy in combination. In addition, in order to improve the operation safety, a safety grating 14 electrically connected to the control part is disposed at the through hole, and the specific function of the safety grating 14 and the connection relationship between the safety grating and the control part are mature technologies and will not be described herein again.

Referring to fig. 2 and 3, the mounting table of this embodiment includes a bottom plate fixed on the bearing frame 9, a top plate located above the bottom plate, and a plurality of columns supported and connected between the bottom plate and the top plate. As shown in fig. 4 and fig. 2, the positioning portion is specifically a positioning plate 3 fixed on the bottom plate through a screw, the positioning plate 3 has a rectangular overall structure as shown in fig. 5, and mounting holes 303 are respectively formed at four corners of the positioning plate, and the mounting holes 303 are used for allowing the screw to pass through to achieve the fixed connection with the bottom plate. In addition, a recess 301 is formed in the middle of the positioning plate 3 so as to follow the fork 102, and an air filling hole 302 and a through hole 305 for passing a probe of a pressure sensor described below are formed at the bottom of the recess 301.

In addition, two positioning holes 304 are formed in the positioning plate 3 corresponding to the connecting holes 103 at the circumferential side of the fork slot 102 shown in fig. 1, and positioning posts are inserted into the respective positioning holes 304, so that the positioning of the fork housing 1 on the base plate can be configured by the insertion fit between the positioning posts and the connecting holes 103 of the fork housing 1. Meanwhile, due to the positioning of the shift fork housing 1, the shift fork groove 102 and the groove 301 form a shift fork cavity. At this time, in order to improve the sealing effect of the shifting fork cavity, a sealing gasket sleeved on the two positioning columns is arranged on the positioning plate 3, and the sealing gasket can be clamped between the shifting fork shell 1 and the bottom plate due to the positioning of the shifting fork shell 1.

The pressing portion of this embodiment has the extrusion end that can stretch out in order to extrude shift fork casing 1 to this accessible extrusion shift fork casing 1 improves shift fork casing 1 location stability on locating plate 3. As shown in fig. 2 and fig. 3, the pressing portion of the present embodiment specifically includes a first cylinder 8 disposed on the frame, and the pressing end is a pressing block 6 connected to the telescopic end of the first cylinder 8. The specific structure of the pressing block 6 is as shown in fig. 6, the entire pressing block is a bilateral symmetry structure, two pressing surfaces corresponding to the end surfaces of the shifting fork shell 1 are formed at the bottom of the pressing block, and the pressing surfaces are specifically planes. In addition, in order to prevent the shifting fork shell 1 from being scratched by the pressing block 6 due to the extrusion of the shifting fork shell 1, the two pressing surfaces are fixedly connected with nylon blocks respectively, so that the pressing block 6 can extrude the shifting fork shell 1 through the nylon blocks.

In this embodiment, for improving the result of use, briquetting 6 specifically connects in the flexible end of first cylinder 8 through floating the joint, so set up, can do benefit to the automatic alignment of nylon piece and the extrusion face 601 of shifting fork casing to can improve the extrusion effect to shifting fork casing 1. Wherein, the concrete structure of floating joint refers to prior art can. In order to obtain a better extrusion effect, as shown in fig. 3 and 4, a guide post 7 slidably penetrating through the top plate is further fixedly connected to a side surface of the pressing block 6, so that the pressing block 6 can be guided to move up and down, and the pressing block 6 can be ensured to smoothly extrude the shifting fork housing 1.

Referring to fig. 3 and 5, the blocking portion has a blocking end capable of extending outward to block the via hole, and specifically includes a second cylinder 4 disposed on the frame, where the blocking end is specifically a plug 12 fixedly disposed at a telescopic end of the second cylinder 4, and the plug 12 specifically includes a cylindrical main body 1201, and an insertion end 1202 fixedly connected to an end of the main body 1201. To facilitate plugging of the through-hole by plug 12, the end of insertion end 1202 is conically configured as shown in fig. 7, thereby facilitating rapid insertion of plug 12 into the through-hole. As shown in fig. 7, a seal ring 13 is fitted over the plug 12 to abut against an end of the main body 1201, and the seal ring 13 is interposed between the plug 12 and the fork case 1 when the insertion end 1202 is inserted into the through hole, thereby improving the sealing performance for plugging the through hole.

In addition to the above structure, in this embodiment, a switch portion electrically connected to the control portion is further disposed on the frame, and the switch portion is configured to output a switch signal to start or stop the control portion when triggered by the outside. The switch part comprises a switch button 10, an emergency stop button 11 and a manual operation button, and the external trigger finger presses the buttons by hand. The switch button 10 is used for controlling the start and stop of the normal work of the detection device, the emergency stop button 11 is used for controlling the detection device to stop when an abnormality occurs, and the manual operation button can enable each action of the detection device to be carried out step by step so as to facilitate maintenance.

The control part of this embodiment has a timing module with a preset time threshold value, and is electrically connected with the first cylinder 8 and the second cylinder 4, and the control part is configured to control the first cylinder 8 and the second cylinder 4 to act in sequence, so that the pressing block 6 and the plug 12 sequentially form extrusion on the shifting fork housing 1, and plug the through hole, thereby forming a closed cavity in the shifting fork cavity. The inflation part is used for receiving a control signal of the control part and inflating the sealed cavity, and specifically comprises an air pipe connected with an external air source, an electromagnetic valve for controlling the on-off of the air pipe, and a digital display pressure gauge arranged on the top plate, wherein the digital display pressure gauge is used for displaying the pressure of the gas output by the external air source to the sealed cavity. By arranging the digital display pressure gauge, the pressure of the gas output by the external gas source can be limited within a proper range based on the pressure value shown by the digital display pressure gauge. Based on the existing structure of the shift fork housing 1, the pressure of the gas output from the external gas source is limited to 0.2Mpa in this embodiment.

The pressure monitoring part specifically adopts a pressure sensor, and a probe of the pressure sensor is arranged in the shifting fork cavity through the through hole 305 so as to monitor the pressure value in the closed cavity. In addition, a pressure threshold is preset in the pressure sensor, and a pressure signal can be output to the control part when the monitored pressure value in the closed cavity reaches the pressure threshold, so that the control part controls the inflating part to stop inflating. The pressure threshold of this embodiment is the same as the pressure of the gas output from the external gas source, i.e. 0.2 Mpa. The alarm portion of the present embodiment may perform an alarm in response to a control signal of the control portion, because the pressure parameter monitored by the pressure sensor is smaller than the pressure threshold when the counted time reaches the time threshold. The alarm part is a buzzer alarm, the time threshold is preferably set to 60s, and the value can be adjusted according to the specific situation.

Based on the above overall description, when the device for detecting the sealing performance of the present embodiment is used specifically, the shifting fork housing 1 is placed in the protective cover through the through hole, and the two connecting holes 103 of the shifting fork housing 1 are sleeved on the positioning columns of the bottom plate; then, starting the switch button 10, after the first cylinder 8 and the second cylinder 4 sequentially act, the control part controls the electromagnetic valve to open so that an external air source inflates the closed cavity, and when the pressure in the closed cavity monitored by the pressure sensor reaches 0.2MPa, a signal is sent to the control part so that the control part controls the electromagnetic valve to close and stops inflating the closed cavity; finally, when the timing time reaches 60s, the control part judges the pressure value monitored by the pressure sensor, and if the pressure value is less than 0.2Mpa, the control part controls the buzzer alarm to alarm, namely, the shifting fork shell 1 has the defects of cracks, cracks and the like which influence the air tightness; otherwise, it is not.

The tightness detection device of the embodiment has the advantages of simple structure, convenience in operation and sensitivity in air tightness detection of the shifting fork shell 1; in addition, the air tightness detection of a plurality of shifting fork shells 1 can be realized at the same time, so that the working efficiency is higher; in addition, compared with the traditional detection method under the liquid environment, the detection method of the detection device not only facilitates the fixing of the shifting fork shell 1, but also omits the procedures of wiping water, blowing residual liquid and the like, thereby ensuring that the tightness detection device has a better use effect.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a leakproofness detection device to constitute the detection to shift fork groove (102) position gas tightness of shift fork casing (1), shift fork casing (1) have with shift fork groove (102) intercommunication, the via hole that passes with the confession declutch shift axle, leakproofness detection device includes the frame, and locates detecting element in the frame, its characterized in that: the detection unit comprises a positioning part for positioning the shifting fork shell (1) on the rack, a pressing part arranged above the shifting fork shell (1) corresponding to the shifting fork groove (102), a plugging part arranged on one side of the shifting fork shell (1) corresponding to the through hole, a control part with a timing module, an inflation part, a pressure monitoring part and an alarm part, wherein the inflation part, the pressure monitoring part and the alarm part are electrically connected with the control part;

the positioning portion and the shifting fork groove (102) form a shifting fork cavity in a surrounding mode, the pressing portion is provided with an extruding end capable of extending outwards to extrude the shifting fork shell (1), the blocking portion is provided with a blocking end capable of extending outwards to block the through hole, the timing module is preset with a time threshold, the pressure monitoring portion is preset with a pressure threshold, the control portion is electrically connected with the pressing portion and the blocking portion to control the extruding end and the blocking end to act successively to enable the shifting fork cavity to form a closed cavity, and the pressure monitoring portion monitors the pressure in the closed cavity.

2. The sealability detection apparatus of claim 1, wherein: the rack is provided with a switch part electrically connected with the control part, and the switch part is configured to be triggered by the outside world to output a switch signal so as to start or stop the control part.

3. The sealability detection apparatus of claim 1, wherein: the pressing portion comprises a first air cylinder (8) arranged on the rack, and the extrusion end is connected with a pressing block (6) at the telescopic end of the first air cylinder (8) through a floating joint.

4. The sealability detection apparatus of claim 3, wherein: the pressing block (6) is fixedly connected with a guide post (7) which is arranged on the rack in a sliding mode and used for guiding the movement of the pressing block (6).

5. The sealability detection apparatus of claim 3, wherein: a nylon cushion (5) is arranged on the end face of one side of the pressing block (6) connected with the shifting fork shell (1).

6. The sealability detection apparatus of claim 1, wherein: the plugging part comprises a second cylinder (4) arranged on the rack, and the plugging end is a plug (12) fixedly arranged at the telescopic end of the second cylinder (4).

7. The sealability detection apparatus of claim 6, wherein: the end part of the plug (12) which is used for plugging the via hole is constructed to be conical, a sealing ring (13) is sleeved on the plug (12), and the sealing ring (13) is clamped between the plug (12) and the shifting fork shell (1) due to the fact that the plug (12) is right for plugging the via hole.

8. The sealability detection apparatus of claim 1, wherein: the rack is provided with a protective cover for covering the detection unit, a through hole for the shifting fork shell (1) to pass through is formed in the protective cover, and a safety grating (14) electrically connected with the control part is arranged at the through hole.

9. The sealability detection apparatus of claim 1, wherein: the detection units are arranged on the rack side by side.

10. The sealability detection apparatus of any one of claims 1 to 9, wherein: the positioning part is provided with a sealing gasket, and the sealing gasket is clamped between the positioning part and the shifting fork shell (1) due to the positioning of the shifting fork shell (1).