JPH108488A - Coupling device between first vehicle unit and second unit connectable to it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a coupling device where working medium for connecting the first vehicle unit to the second unit does not leak by providing one or both of the first and the second unit with a pressure removing member, and actuating the above member in the case of automatic or mechanical connection of a quick coupling element. SOLUTION: The first and the second unit are severally provided with a female quick coupling 4 and a male quick coupling 5 which connect and release hydraulic circuits 6, 6a, 7, 7a. A nipple end 18 is pressed in a sleeve 15 for mechanically coupling them. In addition, both the female quick coupling 4 and the male quick coupling 5 are severally provided with pressure removing members 9, 10, which act at the time of the connection of the quick couplings 4, 5 to remove the excessive pressure of the hydraulic circuit, and makes connection against the excessive pressure of the hydraulic circuit. Thus the state where the working medium does not leak can be assured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to an apparatus for connecting a first vehicle unit to a second unit used for the first vehicle unit. The first unit may be a truck, a loader, a lorry, or the like. Second
The unit may be various types of equipment, such as a wiping or cutting unit, a snowplow, a lift, and the like. The connection state includes, in addition to the mechanical connection of the first and second units, also an automatic and / or mechanical hydraulic connection by the quick coupling element of said first and second unit, which is included in the quick coupling element. Male and female coupling portions are provided.

[0002]

2. Description of the Prior Art It is known that a device of the type described above can be connected to a first vehicle unit of the type described above. In particular, in the case of large plant machines, vehicles temporarily equipped with various types of equipment can be used to meet the requirements occurring during different seasons of the year.

[0003] It is also known that the device or its equivalent can be supplied with energy from the first vehicle unit in question, to which one or more power sources for driving the elements included in the device. A source is provided. The power source may be hydraulic or electrical.
When connecting the device to a vehicle or its equivalent,
Hydraulic and electrical connections can be made. The connection of the power source can be made by the mechanical connection operation of the device to the vehicle.

In this connection, it is also known to use quick coupling elements for connecting and disconnecting various hydraulic circuits or systems or electrical circuits.

It is also known to operate the coupling element from the driver's seat or equivalent, in connection with the connection or disconnection of units and hydraulics and electrical circuits or systems, so that the driver does not have to leave the vehicle. Have been.

[0006]

DISCLOSURE OF THE INVENTION

Technical Issues The connection of devices such as loaders, vehicles, trucks, wood cutting machines or the like is often done outdoors under various temperature conditions. The apparatus includes one or more hydraulic circuits or one or more hydraulic systems that must be powered from a hydraulic power source of a loader or equivalent. When the device is disconnected, its hydraulic circuit and / or hydraulic system is also disconnected. The hydraulic circuit of the device must be prevented from leaking from the hydraulic system, and by one or more valves or shields, which, when disengaged, prevent the working medium of the hydraulic system from leaking. Or the equivalent is closed. The pressure of the hydraulic medium rises significantly from the time the device is disconnected to the time the device is reconnected. High pressures (eg, 500 bar or more) may cause circuit /
When in the system, an effective coupling device is required to connect the hydraulic source of the vehicle unit to the hydraulic circuit or system of the device. An object of the present invention is to solve this problem.

[0007] The invention proposes to use a pressure relief device. There is also a need for a device or its equivalent that can be connected to the first vehicle unit only by the driver of the first vehicle unit without leaving the position of the driver. This places special requirements on the pressure relief device. The present invention also solves this problem.

There is also a separate need to be able to make leak-free hydraulic connections and disconnections regardless of the pressure relief element. This problem is also solved by the present invention.

According to the present invention, the hydraulic coupling device can be configured such that excessive wear and tear of the quick coupling element or part does not occur. Based on the pressure build-up of the hydraulic system or its equivalent, the connection of the quick coupling part can be made by means of an automatic locking and holding device which creates a separating force in the coupling. The present invention also solves this problem.

There is also a need to manufacture a coupling device that prevents confusion and prevents couplings from being directed to different hydraulic lines / hydraulic circuits and being incorrectly connected (mixed). Furthermore, the play of the suspension or locking device of the quick coupling element or quick coupling part with respect to the first and second units must be compensated for, so that an effective connection can be made independent of said play. Furthermore, when connecting the device to the vehicle unit, two or more hydraulic quick coupling elements can be connected, and the electric quick coupling element can also be connected, and the electrical connection of the device or its equivalent The element can be powered by one or more power supplies of the first vehicle unit.
It is also important to configure the coupling device of the hydraulic and electrical system so that the field of view from the driver's seat is not affected. Similarly, if the device or its equivalent is accidentally disengaged from the first vehicle unit, the hydraulic circuit or equivalent must be closed at the hydraulic connection location so as not to leak. In certain cases, in connection with the desired automatic connection of hydraulics and electricity, the device must be able to manually connect one or more quick couplings. The present invention also solves this problem.

There is also a need to be able to provide a removal element on one or more quick couplings. The present invention also solves this problem and provides a leak-free coupling for use in certain fields.

[0012]

A feature of the device is that one or both of the first and second units are provided with a pressure relief member, which operates when the automatic and / or mechanical connection of the quick coupling element. . If there is an overpressure in the hydraulic system or hydraulic circuit of the second unit, the pressure relief member removes this overpressure when the element goes idle. The connection can be made against overpressure of the hydraulic system or hydraulic circuit.

In one embodiment, one of the male and female coupling portions of each pair of quick couplings to each unit is provided with pressure relief means, and the first and second male and female coupling portions of each pair are provided with pressure relief means. It can work with two parts. The pressure relief means removes the overpressure of the one part and / or the hydraulic system or hydraulic circuit connected to the one part. In another embodiment, both the male and female portions of each pair are provided with a pressure relief element.

The quick coupling used to connect the hydraulic circuit or the hydraulic system can then be connected and disconnected so as not to leak from the quick coupling part. In another embodiment, the quick-coupling part is provided with a relative self-retaining element, which acts upon the connection of the first and the second unit and produces a relative mechanical locking effect. In a preferred embodiment,
One or more pairs of quick coupling male or female portions are provided with a first unit attachment. The corresponding female and male coupling portions of the pair of quick coupling portions are the second
It is placed in the attachment. The quick coupling parts can be mechanically locked together so that there is no separating force in the attachment in the presence of a changing line pressure on the quick coupling part. The device may have one or more electrical quick couplings. In one embodiment, each attachment device has two double acting hydraulic elements, a plurality of, for example, one to six electrical elements. And an electrical return line. One or more conical control plugs can be used in the coupling device to ensure the control action of the quick coupling part, which reduces the wear by the coupling action. The attachment and the quick coupling portion can also be configured such that there is no risk of confusion when connecting two or more pairs of quick coupling portions. In a preferred embodiment, the attachment is resiliently mounted in the first and second units,
The play between the attachment and the unit can be compensated by the spring element. Attachments and associated hydraulic and quick couplings are located on the first and second units, so that the view of the first vehicle unit from the driver's seat is unobstructed. Thus, the second attachment can be located between the outer upper and lower frame beams or bar elements on the second unit. The first attachment of the first vehicle unit can be arranged similarly.

In a preferred embodiment, pressure relief members are used on both the male and female portions of each pair of hydraulic quick couplings. One coupling portion of each pair has a longitudinally displaced inner sleeve, which has an outer end projection extending parallel to the biasing section of the second coupling portion of the pair. Between the protruding part and the biasing section, a sealing device with a sealing element subjected to the specific shape of the biasing section is arranged, thereby ensuring a reliable initial biasing action to prevent said leakage, It is possible to guarantee a state without any. In the part where the working medium flows, the inner sleeve supports a longitudinally displaced valve body in the one part. The working medium can be sent to the projecting and biasing part, and the part supporting the pressure relief means in the inner sleeve is arranged behind the inner sleeve. The second part is preferably provided with a volume absorbing element, the pressure relief means of the second part being arranged behind this volume absorbing element.

[0016]

[Advantages] The sun,
Even under outdoor conditions where there is a large temperature change due to cold air or the like, a coupling effect that effectively acts on hydraulic pressure can be obtained. When desired, the automatic coupling can be combined with a manual coupling element for hydraulics and electricity, and can be replaced therewith. A long service life of the coupling device can be guaranteed, and a device having first and second attachments for hydraulic and electrical connections provides high compatibility for relatively large plant machines. Conventional devices for the first and second units can be omitted, the use of the elements is flexible and the cost of the coupling elements can be significantly reduced. A new quick coupling element can be used, which ensures a leak-free condition. The same person can perform the connection process from the driver's seat without having to leave the driver's position.

[0017]

Embodiments of the present invention will be described below.

In FIG. 1, reference numeral 1 denotes a first vehicle unit comprising a loader, and reference numeral 2 denotes, for example, a lift having a fork 2a of a pallet or its equivalent, which can be connected to the first unit. Indicates a unit. The second unit is rigidly connected by a mechanical device 3, and the mechanical device itself may be known.

FIGS. 2 and 3 show the quick coupling element for hydraulic pressure contained in the coupling device between the first and second units. Said element consists of one or more pairs of quick couplings, one of which is shown in FIG. 2, the female part is indicated by reference numeral 4 and the male part is indicated by reference numeral 5. The quick coupling connects and disconnects hydraulic lines, circuits or systems 6, 6a, 7, 7a. In another embodiment, the same attachment whose position can be reversed or mixed may have both male and female couplings, and other attachments have corresponding male and female couplings. It may be something. The lines 6, 7 can be mounted in the coupling in a known manner using a nut connection.

Hydraulic means are located in the first unit and one or more hydraulic power sources for operating hydraulic means and elements (eg, snowplow guides, wiping and cutting elements, lifts, etc.) in the second unit. Consisting of sources. In this embodiment, the male part is arranged in the first unit and the female part is arranged in the second unit. In the embodiment of the drawing, in the connection position of the quick coupling, the working flow 8 flows from the circuit / system 6a via the female and male coupling to the circuit / system 7a. The direction of the working flow between the circuits / systems 6, 7 can be diverted so that the hydraulic flow flows in the opposite direction 8 '. The parts 4, 5 can also be connected against the pressure P 1 of at least one part 5. If desired, the device can also be configured so that it can be connected against the pressures P, P1 of both parts 4,5. With little leakage, for example at most 1.0 per coupling
It is also possible to connect in the state of ml. In order to achieve the above-mentioned effect, both the female and male couplings at the parts 4,5 are provided with pressure relief elements 9,10, an inner sleeve 11 and a volume absorber 12 are provided. The female pressure relief and volume absorption device is only symbolically shown. In this case, it is not necessary to provide such elements in the female part, since overpressure occurs in the device, for example in the male part. Where the male and female portions are oppositely disposed within the first and second units, the female portion may simply be provided with a pressure relief and volume absorption device. In order to reduce the number of types of coupling parts, in one embodiment it is preferred to provide both of said elements in both the male and female coupling. Furthermore, the coupling has an initial sealing device, so that an initial sealing action is provided between the coupling parts to prevent leakage before the overpressure P, P1 is removed. The first sealing means is part 4,5
, Which are symbolically indicated by reference numerals 13 and 14. This is especially important if the inner sleeve and the volume absorber ensure an initial relatively low coupling force and can manually connect the female and male parts. In addition, the inner sleeve 15
Which protects dust from entering the space 16 between the sleeves 11, 15 on which the springs 17 act, and in connection with the connection of the parts 4, 5, the nipple end 18 of the part 5 in the space 16 You can push it. Parts 4, 5
Locking ball 19 that locks in the pushed state
Also acts in the space 16, and in FIG.
It is positioned to engage the nipple end 18 via one or more recesses 20. The ball is arranged in a ball race 21 that can be displaced in the length direction with respect to the outer side surface 4a of the female part 4. A longitudinal reciprocation 22 between the parts 4, 5 can be obtained by means of parts 23, 24 consisting of a first unit (e.g. a loader) and a second unit (e.g. a device) which are acted on by external guide elements. Thus, the biasing portions 23, 24 comprise the mounting beams on the first and second units.

In FIG. 2, the first and second units are separated and separated, and in FIG. 3, they are mechanically connected as in FIG. Sleeve 15 keeps ball 19 raised within the internal recess of the ball race. At the time of connection, the nipple end pushes down the sleeve 15 downward (inward), and at the position where the recess 20 faces the ball, the latter can be pushed down by the lower surface or the inner surface of the ball race, and can be kept in the recess 20. When the ball race is in the position of pushing down the ball, the urging members 23 'and 24' can be relatively moved by the mobility between the first and second units. Ball races are smaller than one, but can be displaced longitudinally with significant distance. Therefore, according to the present invention, after the pressure is removed by the pressure removing means 9 and 10, the portions 4 and 5 can be pressed together by the ball 19 and firmly locked, and an automatic locking action can be obtained. The end position of the longitudinal movement of the ball race is determined by the front flange 21 a projecting from the outer end of the sleeve body portion 4.

FIG. 3a shows a variation of the female and male couplings 4 ', 5'. In this case, the inner sleeve 15 'is of a different construction and has a bearing part 15 for centering the valve body 4a of the part 4.
a 'is provided. The bearing part has a number of through holes 15a "for the working medium. Due to the construction of the outer part 15b of the sleeve, an initial sealing can be obtained by means of a stepped structure at the nipple end of the male part 5 ', whose valve body is designated by the reference numeral. 5a ', after which the initial sealing action is achieved by the pressure relief element of one or both coupling parts, which can easily be connected by the volume absorbing action of one or both couplings. If both parts have pressure relief means, the lower pressure is first released when connected, which results in a pressure relief.

In FIG. 4, reference numeral 25 indicates a bar member arranged along the edge of the first unit (for example, a loader). A number of bar members are held by the transverse beams 26, 27 in the width direction of the unit. A number of quick couplings, for example two quick couplings 29, 30 for hydraulic pressure and an attachment 28 of one quick coupling 31 for electricity, are arranged between the two bar members. In a manner corresponding to the hydraulic case, the quick coupling transfers power from one or more power sources 32 of the first unit to one or more elements 33 (lamp, light source, etc.) of the second unit. In this case, a male part of the quick coupling is provided on the attachment 28. It consists of front and rear bar plates 35, 36 arranged in the frame shielding part 37 of the first unit. Second unit (equipment)
Attachments 38 corresponding to the female couplings 39, 40, 41 are provided. This attachment consists of a bar portion 42 on the plate, like the quick coupling portion of the first attachment, where the quick coupling is provided in the recess. A spring element (spring cushion) 43,
44 is provided so that when connected, compatibility of each connection state is obtained, and wear of the quick coupling can be avoided.

FIG. 5 is a front view of the attachment 45 between the transverse bars / beams 46, 47 of the device 34 '. The corresponding device is in the first unit. The attachment is located on the bracket 48. In this embodiment, the attachment uses nuts 49 and screws in a known manner. Other mounting methods (welding) can also be used. The attachment supports the quick coupling portion as described above.

A number of attachments, for example two attachments 45, 45 ', can be applied to a device having an attachment device similar to that described above and to a vehicle.

Two spaces U, U 'for the attachments 45, 45' are shown in FIG. 5, with the lower and upper beams 46 ', 47' extending in the width direction.

FIG. 6 shows a conical control element with a conical plug 50 on the vehicle and a corresponding conical control recess 51 on the device, and vice versa. One, two or more conical control elements can also be configured to reduce wear on the quick coupling.

FIG. 7 shows a hydraulic system 52 for operating the elements 53, 54 of the device. The overpressure created in the system by the quick coupling effect described above can be eliminated. In another embodiment, a removal element comprising a pressure relief member 55 may be used in a vehicle. When mechanically connecting the vehicle and the device, the member 55 engages a valve member 56 having or consisting of a biasing portion. In this case, the working medium / hydraulic oil is supplied to the discharge line 57.
May leak into the oil sump 58. After the pressure is removed, the member 55 is turned, thereby causing the member 55 to rotate.
And the biasing between the biasing portions 56 ends. Alternatively, portion 56 can be configured to relieve pressure at a pair of biased positions from member 55. When passing through this biased position, the discharge line to the oil sump is shut off. Therefore, when disengaging, pressure relief is always performed, even if overpressure occurs. When the vehicle and device are disengaged, the spring-returnable valve 56 returns to its starting position. The discharge of the overpressure medium takes place via a unit 59, which can also be activated manually, for example, can be opened and closed in a known manner. In FIG. 7, quick coupling elements are indicated by reference numerals 60,61. In the embodiment of the drawing, the pressure relief element is located in the return system / line 62. Depending on the mode of operation of the element, the removal element can be arranged instead of or as a supplement to the supply lines 63, 64.

FIGS. 8, 8a and 8b show the construction of the easily removable attachment 64 having the quick couplings 65 and 66 described above. The attachment is removably attached to the bearing portion 67, which is fixed or can be fixed to the first or second unit, and which has one end 64a of the attachment formed by the U-shaped portion 67b of the portion 67. Can be pushed down into the recess 67a, and the outer end thereof has a recess 67c. An attachment can be engaged in this recess via a curved portion or plug 64b. Attachment 64 and part 67b and part 6
Attachment portion 64a is attached to portion 67d facing 7b.
In addition, through holes 67d, 67f, 64c are provided, in which a locking member 68 having an engaging portion and a handle can be engaged and locked. In this way, the attachment is easily applied to the bearing part,
It can be restrained and removed by a simple manual operation. This device is particularly useful in the case of a coupling method using a full or partial manual processing of a quick coupling. The attachment can be configured in a variety of different ways with respect to coupling, female coupling, number of couplings, type of coupling, size of coupling, and the like. In this case, the attachments can be provided individually according to the desired actual case.

In FIG. 9, a separate intermediate portion 69 for connecting the first and second units can be used. The middle part has quick coupling units 72, 73 comparable to the corresponding quick coupling units 74, 75 of the first and second units. The aforementioned control elements (not shown) can also be used in one or both parts. In this case, various quick coupling configurations can be exchanged and selected. Various intermediate coupling parts can also be provided. The feature of the intermediate coupling part is a member or a device provided with male and / or female coupling members at both ends, so that the female and / or male coupling part can be adapted to the units 70, 71. When connecting the quick coupling portions having different configurations of the first and second units,
The intermediate part can also be considered as an adapter unit.

In another embodiment, when attaching the attachment and the quick coupling portion to the first and second units, the intermediate portion acts as a fixture or centering portion. In this case, the parts 72, 74, 7
3, 75 form the centering part and the parts 74, 7
5 are centered on each other and are lined up.
After the centering, it can be displaced (transversely displaced) in a first step and finally the attachment / quick coupling part can be fixed.

FIG. 10 shows a quick coupling portion (male and / or female portion) 77 which can be manually connected to a corresponding quick coupling portion of the first unit, the aforementioned attachment 64 and / or the aforementioned intermediate portion 69. 1 shows a device having

The present invention is not limited to the embodiment shown in the drawings, but can be modified.

[Brief description of the drawings]

FIG. 1 is a side view of a front portion of a first unit (track) and a second unit (device).

FIG. 2 is a partial longitudinal sectional view of the male and female couplings of the quick coupling element and the hydraulic system of the first and second units.

FIG. 3 is a longitudinal sectional view of a quick coupling portion of FIG. 2 at a connection position, and a is a longitudinal sectional view of another embodiment of the quick coupling portion.

FIG. 4 is a side view of a quick coupling portion disposed in an attachment of the first and second units.

FIG. 5 is an end view of a device for mounting an attachment of a related unit, for example, a second unit.

FIG. 6 is a side view of a control element between the first and second units.

FIG. 7 is a side view of another pressure relief element of the first and second units.

FIG. 8 is a cross-sectional view of another attachment device of the attachment of the first and second units, wherein a is a bottom view and b is a plan view.

FIG. 9 is a side view showing a state where the first and second units are connected via an intermediate coupling portion having a quick coupling portion that can be engaged with a corresponding quick coupling portion of the first and second units. FIG.

FIG. 10 is a side view of a quick coupling portion of the second unit that can be manually connected to a corresponding quick coupling portion of the first unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 1st vehicle unit 2 2nd unit 4, 5 Quick coupling element 9, 10 Pressure relief member 52 Hydraulic system P1 Overpressure

Claims (23)

[Claims] 1. A first vehicle unit (1), for example a truck, a loader, etc., can be connected to a second unit (2), for example a device (wiping or cutting device, etc.) used for said first unit, The connection state is such that, in addition to the mechanical connection of the first and second units, the quick coupling element (4, 4) of the first and second units provided with the male and female coupling portions included in the quick coupling element. 5) An apparatus which also comprises an automatic and / or mechanical hydraulic connection with 5), wherein one or both of said units (1) and / or (2) are provided with pressure relief members (9,10), The removal member operates during the automatic and / or mechanical connection of the quick coupling element and the hydraulic system (52) or the hydraulic circuit of the second unit. Apparatus characterized in that, when there is an overpressure in the path (P1), this overpressure is removed and a connection can be made against the overpressure of the hydraulic system or hydraulic circuit. 2. A pressure relief means (9, 10) is provided on at least one of the male and female parts (4, 5) of each pair of said two units (1, 2), said pressure relief means being provided on said quick cup. In the automatic and / or mechanical connection of the ring elements, the pressure relief means is connected to the one and / or one part under the action of the second part of the male and female coupling part of each pair. 2. The device according to claim 1, wherein the overpressure (P, P1) of the hydraulic system or the hydraulic circuit provided is removed. 3. The hydraulic coupling according to claim 1, wherein the coupling of the hydraulic system and the coupling of the hydraulic circuit are such that no leakage occurs from the quick coupling part. Equipment. 4. The quick coupling part (4,
5. The device according to claim 1, wherein a relative self-retaining element is provided at 5), which acts during automatic connection and mechanically locks said quick coupling parts together. An apparatus according to any one of the above. 5. The one or more pairs of quick couplings, wherein the wearable portion (4, 5) of the quick coupling is provided with an attachment of the first unit, the one or more pairs of quick couplings. A method according to any of the preceding claims, characterized in that corresponding male and female coupling parts of the part are provided with a second attachment (45) or (45 ') of the second unit. apparatus. 6. A mechanical locking (19, 21) of the quick coupling part so that no separating force is generated between the attachments even if there is a changing pressure of the line to the quick coupling part. Apparatus according to claim 4 or claim 5. 7. The first attachment (31) comprises one or more electrical quick couplings (31).
And wherein said second attachment (38) comprises a portion of an electric quick coupling capable of engaging said respective portion (41). An apparatus according to claim 5 or claim 6. 8. The attachment (37) or (3)
8) and a quick coupling part associated therewith is arranged below the mechanical coupling device, so that a good view from the driver's seat of said first unit (1) is obtained. 5 or Claim 6
An apparatus according to claim 1. 9. When connecting the first and second units, one or more conical plugs (50) ensure a control action to reduce wear due to the connecting action of the coupling part. Claims 1 to
Apparatus according to any of claims 8 to 13. 10. A quick coupling part (4, 5) that engages with each other is optionally disposed within said first and second attachments, and wherein two or more pairs of quick couplings of said first and second attachments are provided. In the case of the coupling part, when connecting the two or more pairs of quick coupling parts, there is no danger of confusion, for example, when the male part in the first pair of quick coupling parts is the first part, Placed on the attachment,
The female portion is disposed on the second attachment, the female portion of the second pair of quick coupling portions is disposed on the first attachment, and the male portion is disposed on the second attachment. Claim 1
An apparatus according to any one of claims 9 to 9. 11. Each connecting operation comprises two double acting hydraulic elements (3
11. The method according to claim 1, wherein the first and second electric elements act on one or more electric elements and act on an electric return line. apparatus. 12. The method according to claim 1, wherein the first and / or second attachments are resiliently mounted in the first and second units, respectively. An apparatus according to any of the preceding claims. 13. The method according to claim 1, wherein the first and / or second attachment is free space (U,
13. Apparatus according to any of the preceding claims, characterized in that it is arranged close to U '). 14. The method of claim 14, wherein said first and / or second attachments are located between outer upper (47 ') and lower (46') frame beams or bar elements on said first and second units. Apparatus according to any of the preceding claims, characterized in that: 15. The first and second units (1, 1).
Apparatus according to any of the preceding claims, characterized in that each hydraulic quick coupling shuts off the working medium when 2) is accidentally disengaged. 16. When one or more quick coupling parts are arranged on said first and / or second unit, they are adapted to be connected to each other without an associated attachment. Apparatus according to any of the preceding claims, characterized in that: 17. The quick coupling (29, 39) of each pair of hydraulic pressures, wherein the male part and the female part have a pressure relief member (9, 10), and one coupling part of the pair has an outer end. A longitudinally displaceable inner sleeve (11) having a protruding portion, the protruding portion being attached to the second coupling portion of the pair when the male and female portions of the pair are pushed together. The inner sleeve is mounted on a valve body (V) that extends parallel to the biasing section and through which the working medium passes, the inner sleeve being displaceable longitudinally of the one part. Apparatus according to any of claims 16 to 16. 18. A working medium (8) can be sent to said projecting and biasing part, said pressure relief means (9) of said one part being arranged behind said inner sleeve (11). Apparatus according to any of the preceding claims, characterized in that: 19. A volume absorbing element (12) in said second part.
Device according to any of the preceding claims, characterized in that a pressure relief means (10) of the second part is arranged behind the volume-absorbing element. 20. The male and female coupling portions of each of said quick couplings act on a ball locking device (19, 21) with a ball race (19), which is connected to one coupling portion of said quick coupling. The ball race can be displaced relative to one of the frames (4a) by an external control element acting on the ball race against the frame under the action of the biasing member; When the coupling parts are fully assembled, the ball race moves to a first position relative to the frame, and the balls (19) of the ball race engage the frame of the other coupling part, and the frame Dropping into one or more recesses, and then the ball race is in a second position with respect to the frame. Move and by the ball race,
When the ball is retained in the recess, a relative locking action between the male and female coupling portions occurs, and when disengaged, the external control element is idle and the ball race moves relative to the frame. Displaced to said first position, said ball (19) moves away from said recess,
The said locking action is complete | finished, when the said ball race is displaced with respect to the said flame | frame to a starting position, the said ball has moved | separated from the said recessed part, and the said locking action is canceled. 20. The apparatus according to any one of claims 19 to 19. 21. The ball race (21) if the ball race moves slightly longitudinally with respect to the associated quick coupling part, for example the female part (4).
21. Apparatus according to claim 20, characterized in that it keeps the balls (19) pressed down into each recess. 22. The device according to claim 22, wherein the device comprises a manually removable attachment coupled to the bearing portion and / or the intermediate portion of the first portion.
5, 66), and portions (64, 64b) that can be provided in the recesses (67a, 67c) so that the attachment and the bearing portion can be locked to each other by a locking member (68). Apparatus according to any of the preceding claims, characterized in that: 23. An intermediate part (6) having a quick coupling part or a centering part (72, 73).
9) Alternatively, a connection or a center ring of the first and second units (70, 71) can be formed by a fixture, and the coupling portion or the center ring portion corresponds to the corresponding one of the first and / or second units. Quick coupling part and center ring part (7
Apparatus according to any of the preceding claims, characterized in that it is compatible with and can engage with it.