JP2019132418A - Joint for hydraulic circuit - Google Patents

Abstract

To provide a joint for hydraulic circuit which enables two hydraulic circuit constitution elements, where a flange part cannot be provided, to be connected without using a tubular joint separately.SOLUTION: A joint 40 includes a first flange part 45, a second flange part 46 and a body part 47. The first flange part 45 connects the joint 40 to a first element 41, and the second flange part 46 connects the joint 40 to a second element 42. On a connection surface 48 between the first flange part 45 and the first element 41, a first opening 49 opens, and on a connection surface 50 between the second flange part 46 and the second element 42, a second opening 51 opens. At the first flange part 45, a columnar bolt hole 57 is formed for inserting a shaft part of a bolt 56 for fastening the first flange part 45 and the first element 41, and at the second flange part 46, the columnar bolt hole 57 is formed for inserting the shaft part of the bolt 56 for fastening the second flange part 46 and the second element 42.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a joint for a hydraulic circuit for connecting a hydraulic circuit component such as a pipe member, a valve or a hydraulic controller constituting a hydraulic circuit for supplying and discharging hydraulic oil to and from a hydraulic device such as a hydraulic actuator. is there.

  In general, hydraulic actuators such as hydraulic cylinders and hydraulic motors have the advantages of a relatively simple structure, high output, and long life, so that they can drive river gates and reservoirs, or various mechanical devices. It is widely used as a drive device. A hydraulic circuit is provided to supply and discharge the hydraulic oil to and from the hydraulic actuator. The hydraulic circuit has a number of hydraulic circuit configurations such as pipe members, valves, and hydraulic controllers through which the hydraulic oil flows. It has a structure in which elements are connected.

  In such a hydraulic circuit in which a large number of hydraulic circuit components are connected, the two hydraulic circuit components in which hydraulic oil flows are bent or bent at a predetermined angle (for example, 90 °). When connecting in a curved manner, a joint having an oil passage that is bent or curved is usually used. Thus, the applicant of the present application has proposed a joint having an oil passage curved or bent at an angle of 90 ° in Patent Document 1 therein.

Japanese Patent No. 5957387

  As shown in FIG. 1, one joint 1 </ b> A disclosed in Patent Document 1 according to the present applicant includes a first flange portion 3 for connecting to a first pipe member 2 (hydraulic circuit component), and a second The second flange portion 5 for connecting to the pipe member 4 (hydraulic circuit component), the back surface of the first flange portion 3 and the back surface of the second flange portion 5 are coupled to each other and bent at an angle of 90 °. And a main body portion 7 provided with an oil passage 6. The first flange portion 3 is provided with a plurality of screw holes 8 that open to the connection surface with the first tube member 2, and the second flange portion 5 has an opening to the connection surface with the second tube member 4. A plurality of screw holes 9 are provided.

  Thus, when the first pipe member 2 and the second pipe member 4 are connected by the joint 1A, the bolt 10 is screwed into the screw hole 8 through the through hole 12 provided in the flange portion 11 of the first pipe member 2. On the other hand, the bolt 13 is screwed into the screw hole 9 through the through hole 15 provided in the flange portion 14 of the second pipe member 4. However, in the joint 1A shown in FIG. 1, when one of the two hydraulic circuit components to be connected to each other has a structure in which a flange portion having a through hole cannot be provided (for example, see FIG. 2), There is a problem that two hydraulic circuit components cannot be connected.

  Therefore, as shown in FIG. 2, in another joint 1 </ b> B disclosed in Patent Document 1 of the present applicant, the first flange portion 3 or the main body portion 7 is not threaded holes, but through-holes passing through them. 17, and the bolt 18 is screwed into the screw hole 20 formed in the hydraulic circuit component 19 through the through hole 17. However, in the joint 1B shown in FIG. 2, when both of the two hydraulic circuit components to be connected have a structure in which a flange portion having a through hole cannot be provided (for example, see FIG. 3), There is a problem that two hydraulic circuit components cannot be connected.

  Therefore, as shown in FIG. 3, when two hydraulic circuit components 19 and 22 that cannot be provided with a flange portion provided with a through hole are connected using a joint 1B shown in FIG. A straight tubular joint 23 will be incorporated between 1B and the hydraulic circuit component 22. Such a straight tubular joint 23 usually has a flange portion 25 having a plurality of through holes 24 at one end and a flange portion 27 having a plurality of through holes 26 at the other end. It has. When the joint 1B and the hydraulic circuit component 22 are connected by the straight tubular joint 23, the bolt 28 is screwed into the screw hole 9 of the joint 1B through the through hole 24, while the bolt 29 is passed through the through hole 26 to the hydraulic circuit. A screw hole 30 formed in the component 22 is screwed.

  However, in this case, two joints 1B and 23 are required to connect the two hydraulic circuit components 19 and 22, and more bolts are required, which increases the manufacturing cost of the hydraulic circuit. There is a problem that it takes time to maintain the hydraulic circuit. The present invention has been made to solve the above-described conventional problems, and enables two hydraulic circuit components that cannot be provided with a flange portion to be connected without using a separate straight pipe joint. An object to be solved is to provide a hydraulic circuit joint.

  The hydraulic circuit joint according to the present invention, which has been made to solve the above problems, includes a first flange portion for connecting to a first hydraulic circuit component having a passage through which hydraulic oil (hydraulic fluid) flows, and hydraulic oil. A second flange portion for connecting to a second hydraulic circuit component having a passage for circulating the fluid, a first opening portion, a second opening portion, a main body portion, a plurality of first flange portion bolt holes, and a plurality of The second flange portion bolt hole.

  Here, a 1st opening part opens to the connection surface with the 1st hydraulic circuit component of a 1st flange part, The periphery is circular. A 2nd opening part opens to the connection surface with the 2nd hydraulic circuit component of a 2nd flange part, The periphery is circular. The main body portion is coupled to the back surface of the first flange portion and the back surface of the second flange portion, and has a communication path that allows the first opening and the second opening to communicate with each other. Each first flange portion bolt hole is located on a circle concentric with the circle forming the periphery of the first opening on the outside of the main body portion, penetrates the first flange portion in the thickness direction, and the first flange portion 1 Insert a shaft portion of a bolt for connecting to a hydraulic circuit component. Each second flange portion bolt hole is located on a circle concentric with the circle forming the periphery of the second opening on the outside of the main body portion, penetrates the second flange portion in its thickness direction, and passes the second flange portion to the second flange portion. 2 Insert the shaft of the bolt for connecting to the hydraulic circuit components.

  In the hydraulic circuit joint according to the present invention, the plane including the connection surface of the first flange portion with the first hydraulic circuit component and the plane including the connection surface of the second flange portion with the second hydraulic circuit component. They are perpendicular to each other (orthogonal). The first flange portion bolt hole and the second flange portion bolt hole are “through holes”, that is, cylindrical holes having a smooth surface on the inner peripheral surface of which no screw is formed.

  In the hydraulic circuit joint according to one embodiment of the present invention, the first flange portion and the second flange portion are joined or joined together so that their connection surfaces are perpendicular to each other (orthogonal), or integrally formed. Is formed. And the space | interval of the 1st flange part bolt hole located in the site | part nearest to the back surface of this 2nd flange part and this back surface is the bolt head of the bolt which connects a 1st flange part to a 1st hydraulic circuit component, 2nd The bolt head that connects the flange portion to the second hydraulic circuit component is set to a length that does not interfere with each other when the bolt is tightened, after the bolt is tightened, or when the bolt is removed.

  In the hydraulic circuit joint according to the present invention, it is preferable that the first flange portion is formed so that a connection surface with the first hydraulic circuit component is rectangular or square. Moreover, it is preferable that the 2nd flange part is formed so that the connection surface with a 2nd hydraulic circuit component may become a rectangle or a square.

  According to the hydraulic circuit joint according to the present invention, two hydraulic circuit components that cannot be provided with a flange portion having a bolt hole can be connected without using a separate straight pipe joint. The configuration of the hydraulic circuit that supplies and discharges the hydraulic oil to and from the hydraulic device can be simplified, and the manufacturing cost can be reduced.

It is side surface sectional drawing of the conventional hydraulic coupling used for construction of a hydraulic circuit, and two hydraulic circuit components connected by this coupling. FIG. 2 is a side cross-sectional view of another conventional joint used in the construction of a hydraulic circuit and two hydraulic circuit components connected by the joint. FIG. 3 is a side cross-sectional view of the joint and the straight tubular joint shown in FIG. 2 and two hydraulic circuit components connected by the joint and the straight tubular joint. (A) And (b) is a side view and a front view, respectively, of a joint according to one embodiment of the present invention and two hydraulic circuit components connected by the joint. FIG. 5 is a side sectional view of the joint shown in FIGS. 4A and 4B and two hydraulic circuit components connected to the joint. (A) And (b) is the front view and side sectional drawing of the coupling which concern on another embodiment of this invention, respectively. (A) And (b) is a front view and side sectional view of a joint concerning another embodiment of the present invention, respectively.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
(Embodiment 1)
As shown in FIGS. 4A, 4B, and 5, the hydraulic circuit joint 40 according to the first embodiment of the present invention (hereinafter referred to as “joint 40” for short) is a flange having a bolt hole. A first hydraulic circuit component 41 (hereinafter abbreviated as “first element 41”) and a second hydraulic circuit component 42 (hereinafter abbreviated as “second element 42”) that cannot be provided with a section. Are joints (elbows) for connecting or coupling these central axes (longitudinal axes) in a positional relationship such that they are perpendicular to each other. In addition, the 1st element 41 has the channel | path 43 which distribute | circulates hydraulic fluid, and the 2nd element 42 has the channel | path 44 which distribute | circulates hydraulic fluid.

  The joint 40 includes a first flange portion 45, a second flange portion 46, and a main body portion 47. Here, the first flange portion 45 is for connecting or coupling the joint 40 to the first element 41, and the second flange portion 46 is for connecting or coupling the joint 40 to the second element 42. It is. A first opening 49 having a circular periphery is opened on a connection surface 48 (end surface) of the first flange portion 45 with the first element 41, and the second flange portion 46 is connected to the second element 42. A second opening 51 having a circular periphery is opened on the surface 50 (end surface). The connection surfaces 48 and 50 of the first flange portion 45 and the second flange portion 46 are rectangular or rectangular.

  The first flange portion 45 and the second flange portion 46 are joined or joined together or integrally formed in a positional relationship in which the connection surfaces 48 and 50 are perpendicular to each other (orthogonal). The main body 47 is coupled to or joined to the back surface 53 (surface facing away from the connection surface) of the first flange portion 45 and the back surface 54 (surface facing away from the connection surface) of the second flange portion 46. The first opening portion 49 and the second opening portion 51 have a communication passage 55 that allows the first opening portion 49 and the second opening portion 51 to communicate with each other.

  The first flange portion 45 is formed with four cylindrical bolt holes 57 through which shaft portions of bolts 56 for bolting the first flange portion 45 and the first element 41 are inserted. These four bolt holes 57 are cylindrical through holes having a smooth inner peripheral surface, and are located on a circle concentric with the circle forming the periphery of the first opening 49 on the outer side of the main body 47. The flange portion 45 is penetrated in the thickness direction. On the other hand, in the second flange portion 46, four cylindrical bolt holes 59 are formed through which shaft portions of bolts 58 for fastening the second flange portion 46 and the second element 42 are inserted. These four bolt holes 59 are cylindrical through holes having a smooth inner peripheral surface, and are located on a circle concentric with the circle forming the periphery of the second opening 51 on the outside of the main body 47. The flange part 46 is penetrated in the thickness direction.

  Here, the bolt hole 57 of the first flange portion 45 and the bolt hole 59 of the second flange portion 46 are the bolt head of the bolt 56 that fastens the first flange portion 45 and the first element 41, and the second flange portion 46. And the bolt head of the bolt 58 that fastens the second element 42 are provided at positions that do not interfere with each other when the bolts 56 and 58 are fastened, after fastening, or when removed.

  That is, in the positional relationship in FIGS. 4A, 4 </ b> B, and 5, the first flange 45 rises from the second flange 46 or extends vertically (hereinafter referred to as “vertical direction” for convenience). The distance d between the back surface 54 of the second flange portion 46 and the bolt hole 57 of the first flange portion 45 located closest to the back surface 54 is determined when the bolts 56 and 58 are fastened, after being fastened or removed. The bolt head of the bolt 56 and the bolt head of the bolt 58 are set to such a length that they do not contact or conflict with each other.

  In addition, a screw hole 61 is provided in the end surface 60 connected to the first flange portion 45 of the first element 41 so as to be screwed with the male screw of the shaft portion of the bolt 56. On the other hand, the end face 62 connected to the second flange portion 46 of the second element 42 is provided with a screw hole 63 that engages with the male screw of the shaft portion of the bolt 58.

Hereinafter, an example of the procedure for fastening the first element 41 and the second element 42 via the joint 40 will be described.
(1) The joint 40 and the second element 42 are arranged or positioned so that the corresponding bolt holes 59 and the screw holes 63 are opposed or aligned.
(2) The four bolts 58 are respectively screwed into the corresponding screw holes 63 of the second element 42 through the corresponding bolt holes 59, and the joint 40 and the second element 42 are bolted together. At this stage, the bolt 56 is not yet attached.

(3) The joint 40 and the first element 41 are arranged or positioned so that the corresponding bolt holes 57 and the screw holes 61 are opposed or aligned.
(4) The four bolts 56 are respectively screwed into the corresponding screw holes 61 of the first element 41 through the corresponding bolt holes 57, and the joint 40 and the first element 41 are bolted together. As described above, the vertical distance d between the back surface 54 of the second flange portion 46 and the bolt hole 57 of the first flange portion 45 located at the portion closest to the back surface 54 is determined by the bolt head of the bolt 56 and the bolt 58 of the bolt 58. Since the length is set so that the heads do not contact each other, after the joint 40 and the second element 42 are bolted together, the bolt 56 is passed through the bolt hole 57 and the screw hole 63 of the first element 41 is obstructed. Can be screwed in.

  As mentioned above, according to the joint 40 which concerns on Embodiment 1 of this invention, two hydraulic circuit components which cannot provide the flange part provided with the bolt hole can be connected, without using a separate tubular joint separately. Therefore, the configuration of a hydraulic circuit that supplies and discharges hydraulic oil to and from a hydraulic device such as a hydraulic actuator can be simplified, and the manufacturing cost can be reduced.

(Embodiment 2)
Hereinafter, a hydraulic circuit joint 70A (hereinafter referred to as “joint 70A” for short) according to Embodiment 2 of the present invention will be described with reference to FIGS. 6 (a) and 6 (b). However, the basic configuration and function of the joint 70A according to the second embodiment are the same as those of the joint 40 according to the first embodiment shown in FIGS. 4 (a), 4 (b), and FIG. Differences from the above will be described.

  In the joint 70A according to the second embodiment, the shape of each part constituting the joint 70A is slightly different from the corresponding part of the joint 40 according to the first embodiment. A second flange portion 72 and a main body portion 73 are provided. And the 1st opening part 75 opens in the connection surface 74 with the 1st element 41 (refer FIG. 5) of the 1st flange part 71, and the 2nd element 42 (refer FIG. 5) of the 2nd flange part 72 is connected. A second opening 77 is opened in the connection surface 76. Furthermore, the first flange portion 71 is provided with four bolt holes 78, and the second flange portion 72 is provided with four bolt holes 79. In addition, a communication passage 80 that allows the first opening 75 and the second opening 77 to communicate with each other is formed inside the main body 73. In FIGS. 6A and 6B, illustration of some bolt holes 78 and 79 is omitted.

  In the joint 70A according to the second embodiment, the main body 73 includes the bending portion 73a, the first straight pipe portion 73b that connects the bending portion 73a and the back surface 81 of the first flange portion 71, the bending portion 73a, and the second flange. The second straight pipe portion 73c is connected to the back surface 82 of the portion 72. Thus, since the main-body part 73 has the 1st straight pipe part 73b and the 2nd straight pipe part 73c, the 1st flange part 71 and the 2nd flange part 72 are not mutually connected or couple | bonded, but separate. It has become. In addition, the 1st flange part 71 and the 2nd flange part 72 are the plane including the connection surface 74 with the 1st element 41 (refer FIG. 5) of the 1st flange part 71, and the 2nd element of the 2nd flange part 72. 42 (see FIG. 5) and the plane including the connecting surface 76 are formed or arranged so as to be perpendicular to each other (orthogonal).

  In the main body 73, the length (tube length) of the first straight pipe portion 73b is longer than the total length of the bolt 56 (see FIG. 5) that fastens the first flange portion 71 and the first element 41 (see FIG. 5). ing. The length (tube length) of the second straight pipe portion 73c is longer than the entire length of the bolt 58 that fastens the second flange portion 72 and the second element 42 (see FIG. 5). Thereby, the bolts 56 and 58 can be inserted into or removed from the bolt holes 78 and 79 without interfering with the main body 73.

  Also in the joint 70 </ b> A according to the second embodiment, basically, as in the joint 40 according to the first embodiment, two hydraulic circuit components that cannot be provided with a flange portion having a bolt hole are separately provided as straight pipe joints. Therefore, it is possible to simplify the configuration of a hydraulic circuit for supplying and discharging hydraulic oil to and from a hydraulic device such as a hydraulic actuator, and to reduce the manufacturing cost.

(Embodiment 3)
Hereinafter, a hydraulic circuit joint 70B (hereinafter referred to as “joint 70B” for short) according to Embodiment 3 of the present invention will be described with reference to FIGS. 7 (a) and 7 (b). However, the basic configuration and function of the joint 70B according to the third embodiment are the same as those of the joint 70A according to the second embodiment shown in FIGS. 6A and 6B. Will be explained. In addition, in the component of the joint 70B which concerns on Embodiment 3 shown to Fig.7 (a), (b), it is the same as that of the component of the joint 70A which concerns on Embodiment 2 shown to Fig.6 (a), (b), or similar. Are given the same reference numbers.

  In the joint 70 </ b> B according to the third embodiment, the main body portion 73 includes a bending portion 73 a and a second straight pipe portion 73 c, and does not have the first straight pipe portion 73 b. A flange extending portion 85 extending in a direction perpendicular to the back surface 81 is provided from the back surface 81 of the first flange portion 71, and two bolt holes 86 that are through holes are formed in the flange extending portion 85. . These bolt holes 86 are holes through which bolts that fasten the joint 70 </ b> B and the first element 41 pass. The first flange portion 71 is formed with two bolt holes 78 similar to the bolt holes 78 of the first flange portion 71 of the joint 70A. The other configuration of the joint 70B is the same as that of the joint 70A.

  The reason why the flange extending portion 85 and the bolt hole 86 are provided in the joint 70B is as follows. That is, in the joint 70B, since the main body portion 73 does not have the first straight pipe portion 73b, if the four bolt holes 78 similar to those in the joint 70A are provided in the first flange portion 71, the second flange portion This is because even if the bolt 56 is inserted into the two bolt holes 78 closer to 72, the bolt 56 and the curved portion 73 a interfere with each other, and the bolt 56 cannot be inserted into the bolt hole 78. Since the bolt hole 86 formed in the flange extending portion 85 is longer than the bolt hole 78 of the first flange portion 71, the bolt used for these is longer than the bolt 56 used for the bolt hole 78.

  Also in the joint 70B according to the third embodiment, basically, as in the joint 40 according to the first embodiment or the joint 70A according to the second embodiment, two hydraulic circuit configurations in which a flange portion having a bolt hole cannot be provided. Since the elements can be connected without using a separate straight pipe joint, the configuration of the hydraulic circuit for supplying and discharging hydraulic oil to and from a hydraulic device such as a hydraulic actuator can be simplified, and the production cost can be reduced. Can be reduced.

  1A joint, 1B joint, 2 1st pipe member, 3 1st flange part, 4 2nd pipe member, 5 2nd flange part, 6 oil passage, 7 body part, 8 screw hole, 9 screw hole, 10 bolt, 11 Flange part, 12 through hole, 13 bolt, 14 flange part, 15 through hole, 17 through hole, 18 bolt, 19 hydraulic circuit component, 20 screw hole, 22 hydraulic circuit component, 23 straight tubular joint, 24 through hole, 25 flange portion, 26 through hole, 27 flange portion, 28 bolt, 29 bolt, 30 screw hole, 40 hydraulic circuit joint (joint), 41 first hydraulic circuit component (first element), 42 second hydraulic circuit configuration Element (second element), 43 passage, 44 passage, 45 first flange, 46 second flange, 47 body, 48 connection surface, 49 first opening, 50 connection surface, 51 first 2 openings, 53 back surface, 54 back surface, 55 communication path, 56 bolt, 57 bolt hole, 58 bolt, 59 bolt hole, 60 end surface, 61 screw hole, 62 end surface, 63 screw hole, 70A Hydraulic circuit joint (joint) 70B Hydraulic circuit joint (joint), 71 1st flange part, 72 2nd flange part, 73 body part, 73a curved part, 73b 1st straight pipe part, 73c 2nd straight pipe part, 74 connection surface, 75 1st 1 opening portion, 76 connecting surface, 77 second opening portion, 78 bolt hole, 79 bolt hole, 80 communication path, 81 back surface, 82 back surface, 85 flange extending portion, 86 bolt hole.

Claims (3)

A first flange for connecting to a first hydraulic circuit component having a passage for circulating hydraulic oil;
A second flange portion for connecting to a second hydraulic circuit component having a passage for circulating hydraulic oil;
A first opening having an opening in a connection surface with the first hydraulic circuit component of the first flange portion, and having a circular periphery;
A second opening having an opening at a connection surface of the second flange portion with the second hydraulic circuit component, and having a circular periphery;
A main body having a communication path coupled to the back surface of the first flange portion and the back surface of the second flange portion and communicating the first opening and the second opening;
The first flange portion is located on a circle concentric with the circle forming the periphery of the first opening on the outside of the main body portion, and penetrates the first flange portion in the thickness direction. The first flange portion is the first hydraulic circuit. A plurality of first flange portion bolt holes through which a shaft portion of a bolt for connecting to a component is inserted;
The second flange portion is located on a circle concentric with the circle forming the periphery of the second opening portion on the outer side of the main body portion, and penetrates the second flange portion in the thickness direction thereof. A hydraulic circuit joint comprising a plurality of second flange portion bolt holes through which a shaft portion of a bolt for connection to a component is inserted,
A plane including a connection surface of the first flange portion with the first hydraulic circuit component and a plane including a connection surface of the second flange portion with the second hydraulic circuit component are perpendicular to each other;
The hydraulic circuit joint, wherein the first flange part bolt hole and the second flange part bolt hole are through holes. The first flange portion and the second flange portion are joined or joined together so that their connection surfaces are perpendicular to each other, or are integrally formed, and are located at the back surface of the second flange portion and the portion closest to the back surface. And a bolt head connecting the first flange portion to the first hydraulic circuit component and a bolt connecting the second flange portion to the second hydraulic circuit component. The hydraulic circuit coupling according to claim 1, wherein the bolt head is set to a length that does not interfere with each other. The first flange portion is formed such that a connection surface with the first hydraulic circuit component is rectangular,
3. The hydraulic circuit joint according to claim 1, wherein the second flange portion is formed so that a connection surface with the second hydraulic circuit component is rectangular. 4.

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