JP2011220363A - Mounting structure of commutator, and filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure of a commutator suppressing stagnation of a liquid flow flowing in a flowing path having a bent part.SOLUTION: The mounting structure 80 of the commutator includes a hydraulic circuit 10 and the commutator 30. The hydraulic circuit 10 has a housing 40 housing the commutator 30 and an upstream part 12 positioned on an upstream side of the housing 40. In the commutator 30 having a cylindrical shape, a hydraulic fluid L can pass through a circumferential wall part 36 thereof. The commutator 30 is housed in the housing 40 and disposed in a position opposed to an inflow port 50 where the circumferential wall part 36 communicates with the upstream part 12 and the housing 40.

Description

  The present invention relates to a mounting structure for a rectifier provided, for example, in a hydraulic circuit. The present invention also relates to a filter device provided in a hydraulic circuit.

  2. Description of the Related Art Conventionally, for example, a hydraulic circuit provided in a heavy machine is provided with a filter device for filtering hydraulic oil flowing through the hydraulic circuit. The filter device includes a housing and a filter element accommodated in the housing. As the hydraulic oil passes through the filter element, small dust in the hydraulic oil is collected by the filter element. As a result, the hydraulic oil is filtered.

  The filter element includes an element body formed by forming a filter medium into a cylindrical shape, plate members that support both ends of the element body, and the like. The housing is formed in a cylindrical shape in order to accommodate the cylindrical filter element. The hydraulic fluid guided into the housing passes through the filter element from the outside toward the inside.

  In the housing, a flow path is provided in the hydraulic circuit to communicate the downstream portion of the filter device and the inside of the filter element. This flow path is bent in a substantially L shape depending on the posture of the filter device in the hydraulic circuit (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2007-130631

  As in Patent Document 1, when the flow path through which the hydraulic oil flows is bent like an L shape, the flow of the hydraulic oil becomes stagnant at the bent portion. It is not preferable that the flow of hydraulic oil is stagnant.

  An object of this invention is to provide the attachment structure of the rectifier which suppresses that the flow of the liquid which flows through the flow path which has a bending part stagnates. Another object of the present invention is to provide a filter device capable of suppressing the stagnation of the flow of liquid flowing inside.

  The rectifier mounting structure according to the first aspect of the present invention includes a first flow path portion, and is located downstream of the first flow path portion so as to be continuous with the first flow path portion and the first flow path portion. A second flow path portion extending in a direction intersecting with the flow path section, and a flow path through which the liquid flows; and a rectifier that is cylindrical and that allows the liquid to pass through the peripheral wall section. The rectifier is accommodated in the second flow path portion, and the peripheral wall portion is disposed at a position facing a communication port that communicates the first flow path portion and the second flow path portion.

  According to a second aspect of the present invention, there is provided a filter device comprising: a filter element that filters liquid; a housing that houses the filter element; a flow path that is provided in the housing and through which the liquid flows; A passage portion, and a second passage portion that is located downstream of the first passage portion and is continuous with the first passage portion and extends in a direction intersecting the first passage portion. A flow path and a rectifier provided in the housing for rectifying the flow of the liquid. The rectifier has a cylindrical shape, allows the liquid to pass through the peripheral wall portion, and is accommodated in the second flow path portion so that the peripheral wall portion is connected to the first flow path portion and the second flow path. It arrange | positions in the position facing the communicating port which connects a road part.

  A filter device according to a third aspect of the present invention is the filter device according to the second aspect of the present invention, wherein the housing includes a housing main body that accommodates the filter element therein, and is attached to the housing main body to form the filter element. And a head provided with an outlet for letting out the liquid filtered in the above. The flow path is provided in the head.

  The first flow path portion is provided in the head and guides the liquid filtered by the filter element into the head. The second flow path portion is provided in the head and communicates the first flow path with the outlet.

  A filter device according to a fourth aspect of the present invention is the filter device according to the second aspect of the present invention, wherein the housing is filtered by being attached to the housing main body, the housing main body housing the filter element therein. And a head provided with an inlet through which the previous liquid flows. The flow path is provided in the head. The first channel portion is provided in the head and communicates with the inlet. The second channel portion is provided in the head and guides the liquid before being filtered to the filter element.

  A rectifier mounting structure according to a fifth aspect of the present invention is the rectifier mounting structure according to the first aspect of the present invention, wherein the peripheral wall portion has a pleated shape in cross section.

  A filter device according to a sixth aspect of the present invention is the filter device according to any of the second to fourth aspects, wherein the peripheral wall portion has a pleated cross section.

  According to the present invention, the stagnation of the liquid flow is suppressed.

Schematic which shows a hydraulic circuit provided with the attachment structure of the rectifier which concerns on the 1st Embodiment of this invention. Sectional drawing which expands and shows the vicinity of a rectifier and a rectifier in the hydraulic circuit shown in FIG. Sectional drawing which shows the state by which the vicinity of the rectifier shown by FIG. 2 was decomposed | disassembled. Sectional drawing of the hydraulic circuit containing a rectifier shown along F4-F4 line shown in FIG. Sectional drawing which shows the filter apparatus which concerns on the 2nd Embodiment of this invention. Sectional drawing which shows the state by which the filter apparatus shown by FIG. 5 was decomposed | disassembled. Sectional drawing which shows the state by which the rectifier was decomposed | disassembled from the head shown by FIG. Sectional drawing of the head shown along the F8-F8 line | wire shown in FIG. Sectional drawing which shows the filter apparatus which concerns on the 3rd Embodiment of this invention.

  A rectifier mounting structure according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram schematically showing a hydraulic circuit 10. The hydraulic circuit 10 is provided in a heavy machine, for example. The hydraulic circuit 10 is connected to an actuator 11 of a heavy machine and is used to operate the actuator 11. In the drawing, a part of the hydraulic circuit 10 is indicated by a solid line, and the other part is omitted by a two-dot chain line. In the hydraulic circuit 10, hydraulic oil L flows. The hydraulic oil L is an example of the liquid referred to in the present invention. The hydraulic circuit 10 is an example of a flow path referred to in the present invention.

  The hydraulic circuit 10 includes a rectifier 30. In FIG. 1, the rectifier 30 is drawn with a solid line. The rectifier 30 is provided in a portion of the hydraulic circuit 10 where the flow is bent in a substantially L shape. FIG. 2 is an enlarged cross-sectional view showing the rectifier 30 and the vicinity of the rectifier 30 in the hydraulic circuit 10.

  FIG. 3 is a cross-sectional view showing a state where the vicinity of the rectifier 30 is disassembled. The rectifier 30 is an example of a rectifier referred to in the present invention. As shown in FIG. 3, a part of the hydraulic circuit 10 functions as a rectifier housing 40 that houses the rectifier 30.

  FIG. 4 is a cross-sectional view of the hydraulic circuit 10 including the rectifier 30 shown along line F4-F4 shown in FIG. As shown in FIGS. 2 to 4, the rectifier housing 40 includes a cylindrical housing body 41 and a lid member 42. The housing body 41 has a cylindrical shape, and in the present embodiment, has a cylindrical shape as an example, and one end is open. The housing body 41 is provided at a portion bent in an L shape in the hydraulic circuit 10. The housing body 41 communicates with the hydraulic circuit 10 and constitutes a part of the hydraulic circuit 10. The housing main body 41 is arranged such that its axis X intersects the upstream portion 12 upstream of the housing main body 41 in the hydraulic circuit 10 in an L shape. In other words, the housing body 41 is disposed on the downstream side of the portion that bends in an L shape in the hydraulic circuit 10.

  An outlet 44 that communicates with a downstream portion of the rectifier 30 in the hydraulic circuit 10 is formed at the downstream end of the housing body 41.

  The lid member 42 closes the opening 45 of the housing body 41 so that it can be opened and closed. The lid member 42 is fastened to the housing main body 41 by, for example, a bolt 46 and the state where the opening 45 is closed is fixed. The edge 47 of the opening 45 of the housing body 41 is provided with a structure that tightly seals the gap between the edge 47 and the lid member 42. As an example of this structure, a seal member is provided. As an example of the sealing member, an O-ring 48 is provided. In a state where the lid member 42 closes the opening 45, the space between the lid member 42 and the edge 47 of the opening 45 is liquid-tightly closed by the O-ring 48. For this reason, the hydraulic oil L does not leak from the rectifier housing 40.

  As shown in FIG. 4, the rectifier 30 includes a rectifier body 31, an inner cylinder 32, a first rectifier plate 33, and a second rectifier plate 34. The rectifier body 31 is cylindrical. As shown in FIG. 4, in this embodiment, the rectifier body 31 is formed in a cylindrical shape by folding a plate-shaped mesh member into a pleat shape.

  The rectifier body 31 is not limited to being formed from a mesh member. The rectifier body 31 may be formed of a material through which the hydraulic oil L can pass. The mesh member formed in a mesh shape is an example of the material. In addition, the material which comprises the rectifier main body 31 should have a small resistance when the hydraulic oil L passes. A mesh member having a small resistance when the hydraulic oil L passes is used. The inner cylinder 32 is provided inside the rectifier body 31 and supports the rectifier body 31 from the inside. The inner cylinder 32 is formed with a plurality of communication holes 32 a penetrating the peripheral wall of the inner cylinder 32.

  The rectifier first plate 33 supports one end of the rectifier body 31. The rectifier first plate 33 closes an opening at one end of the rectifier body 31. The rectifier second plate 34 supports the other end of the rectifier body 31. A communication hole 35 that communicates with the inside of the rectifier body 31 is formed in the second plate 34 for the rectifier. The communication hole 35 is indicated by a dotted line in the figure.

  Next, the attitude of the rectifier 30 in the rectifier housing 40 will be described. As shown in FIG. 2, the rectifier 30 is arranged so that the peripheral wall portion 36 is opposed to the inlet 50 through which the hydraulic oil L flows into the rectifier housing 40 in the direction in which the hydraulic oil L flows. The direction A in which the hydraulic oil L flows here is a direction in which the hydraulic oil L flowing from the upstream portion 12 through the inlet 50 into the rectifier housing 40 flows. In the present embodiment, the direction in which the hydraulic oil L flows is, for example, the direction in which the axial center line Q of the upstream portion 12 extends. The inflow port 50 is an example of a communication port referred to in the present invention.

  As shown in FIG. 3, a holding recess 49 that holds the other end of the rectifier 30 is formed at the end of the housing body 41. The rectifier 30 is fitted into the holding recess 49. By housing the rectifier 30 in the holding recess 49, the posture and position of the rectifier 30 in the rectifier housing 40 are fixed and held. The outflow port 44 is formed in the holding recess 49. When the rectifier 30 is accommodated in the holding recess 49, the communication hole 35 formed in the second plate 34 for rectifier communicates with the outlet 44. For this reason, the inside of the rectifier main body 31 and the outflow port 44 communicate.

  A spring member 60 is provided between the lid member 42 and the rectifier 30. The spring member 60 is a coil spring. In a state where the lid member 42 closes the opening 45 in a liquid-tight manner, the spring member 60 is compressed between the lid member 42 and the first plate for rectifier 33. As the spring member 60 is compressed, the rectifier 30 is urged so as not to come out of the holding recess 49.

  As shown in FIG. 4, the rectifier 30 is arranged coaxially with the housing body 41 so that the axis Y of the rectifier and the axis X of the housing body 41 overlap. Between the housing main body 41 and the rectifier 30, a gap S1 through which the hydraulic oil L can flow is provided.

  The upstream portion 12 and the rectifier 30 are combined to constitute a rectifier mounting structure 80 which is an example of the rectifier mounting structure referred to in the present invention. The upstream portion 12 is an example of a first flow path section referred to in the present invention, and the rectifier housing 40 is an example of a second flow path section referred to in the present invention.

  Next, the operation of the rectifier 30 will be described. As shown in FIG. 2, the hydraulic oil L circulating in the hydraulic circuit 10 flows into the rectifier housing 40 through the inflow port 50. As shown in FIG. 4, part of the hydraulic oil L that has flowed into the rectifier housing 40 from the inlet 50 collides with the rectifier 30, passes through the communication hole 32 a of the rectifier body 31 and the inner cylinder 32, and reaches the inner cylinder. Go inside 32. The other part of the hydraulic oil L flows toward the position P1 on the opposite side of the outlet 44 in the housing body 41 while flowing through the gap S1. At this time, the other part of the hydraulic oil L passes through the rectifier body 31 from the outside to the inside as indicated by the arrows in the drawing in the process of flowing through the gap S1 toward the position P1. Most of the hydraulic oil L passes through the rectifier body 31 and reaches the inside of the rectifier body 31 before reaching the position P1.

  When the hydraulic oil L passes through the rectifier 30, the flow of the hydraulic oil L flows downstream without being disturbed. This point will be specifically described. When there is a portion bent in an L shape in the hydraulic circuit 10, the flow is disturbed due to the bending of the flow of the hydraulic oil L in the downstream portion of the L shape.

  2 and 4, when there is no rectifier 30 in FIGS. 2 and 4, the hydraulic oil L flowing in from the inlet 50 reaches the position P1 and is reflected at the position P1 in various directions. Flowing. This causes turbulence in the flow.

  However, the presence of the rectifier 30 causes the hydraulic oil L to pass through the rectifier 30 before reaching the position P1, so that less hydraulic oil L hits the inner surface of the rectifier housing 40 and is reflected. As a result, the flow of the hydraulic oil L is less likely to be disturbed in the rectifier housing 40.

  As described above, the flow of the hydraulic oil L is suppressed by the rectifier mounting structure 80.

  Moreover, the passage area of the hydraulic oil L in the rectifier body 31 can be increased by folding the rectifier body 31 into a pleat shape. By increasing the passage area, the flow of the hydraulic oil L can be moderated. Since the flow of the hydraulic oil L becomes gentle, the rectification action of the rectifier 30 can be improved.

  In the present embodiment, the rectifier 30 and the rectifier housing 40 can be configured as one unit. That is, after the rectifier 30 is housed in the rectifier housing 40 to form one unit, this unit can be incorporated into the hydraulic circuit 10.

  Next, a filter device according to a second embodiment of the present invention will be described with reference to FIGS. In addition, the structure which has the same function as 1st Embodiment attaches | subjects the code | symbol same as 1st Embodiment, and abbreviate | omits description.

  FIG. 5 is a cross-sectional view showing the filter device 110. As shown in FIG. 5, the filter device 110 is provided in the hydraulic circuit 100 and constitutes a part of the hydraulic circuit 100. In the drawing, a portion 101 upstream of the filter device 110 in the hydraulic circuit 100 is indicated by a two-dot chain line, and a portion 102 downstream of the filter device 110 is indicated by a two-dot chain line. The filter device 110 filters the hydraulic oil L flowing through the hydraulic circuit 100. The hydraulic circuit 100 may be the same as the hydraulic circuit 10 described in the first embodiment.

  FIG. 6 is a cross-sectional view showing a state where the filter device 110 is disassembled. As shown in FIG. 6, the filter device 110 includes a filter element 120, a housing 130 that houses the filter element 120, and a rectifier 30.

  The filter element 120 includes an element main body 121, an inner cylinder 122, first and second filter plates 123 and 124, and a fixing plate 125. The filter element 120 is an example of the filter element referred to in the present invention.

  The element main body 121 is formed of a first filter medium 126 that can collect foreign matters to be removed such as dust in the hydraulic oil L, and has a cylindrical shape. The inner cylinder 122 has a cylindrical shape with both ends opened, and is provided inside the element body 121. The inner cylinder 122 supports the element body 121 from the inside. A plurality of communication holes 122b penetrating the peripheral wall portion 122a are formed in the peripheral wall portion 122a of the inner cylinder 122.

  The first filter plate 123 supports one end of the element body 121. The first plate for filter 123 is formed with a communication hole 123 a that communicates with the inside of the element body 121. The second plate for filter 124 supports the other end of the element body 121. The filter second plate 124 liquid-tightly closes the opening at the other end of the element main body 121.

  One end portion of the inner cylinder 122 protrudes to the outside through the communication hole 123 a of the first plate 123. The fixing plate 125 is fixed to one end portion of the inner cylinder 122. Specifically, the fixing plate 125 has a circular planar shape, and a communication hole 125a in which one end of the inner cylinder 122 is fixed is formed inside.

  The housing 130 includes a housing main body 131 and a head 140. The housing 130 is an example of a housing according to the present invention. The housing body 131 has a cylindrical shape with one end opened and the other end closed. The opening 132 at one end of the housing body 131 has a circular planar shape, and a female screw 134 is formed inside the edge 133. The housing main body 131 is an example of the housing main body referred to in the present invention.

  A male screw 127 is formed on the periphery of the fixing plate 125. As shown in FIG. 5, the male screw 127 of the fixing plate 125 is screwed into the female screw 134 of the housing main body 131. When the male screw 127 is screwed into the female screw 134 to the end, the element body 121 is positioned in the housing 130 and its position is fixed.

  The head 140 is detachably fixed to the element body 121. The head 140 is an example of a head referred to in the present invention. As shown in FIG. 5, a male thread 142 that engages with the female thread 134 of the housing body 131 is formed on the peripheral edge 141 of the head 140.

  The head 140 has a protrusion 143 that fits inside the filter element 120 in a state where the male screw 142 is screwed and fixed to the female screw 134 of the housing body 131. Specifically, the protruding portion 143 is fitted into the communication hole 125 a and the inner cylinder 122 through the communication hole 125 a of the fixing plate 125.

A flow path 150 is formed in the head 140. The flow path 150 is an example of the flow path referred to in the present invention. One end of the channel 150 is open at the tip of the protrusion 143, and forms a first inflow port 156. The other end opens to the side wall 144 of the head 140 and forms an outlet 155. The outlet 155 is connected to the portion 102 via the first bushing 210 and communicates with the portion 102 so that the hydraulic oil L can be guided to the portion 102. The inner cylinder 122 and the flow path 150 are in communication. An O-ring 145 is provided as an example of a seal structure that suppresses the occurrence of liquid leakage between the peripheral edge of the communication hole 125a of the fixing plate 125 and the protrusion 143, as shown in FIGS. The path 150 is formed in an L shape and has a first flow path portion 153 and a second flow path portion 154. The first flow path portion 153 is formed in the protruding portion 143 and has a linear shape extending along the protruding portion 143. The 1st flow path part 153 is an example of the 1st flow path part said by this invention.

  The second flow path part 154 is linear and communicates the first flow path part 153 and the outlet 155. The 2nd flow path part 154 is an example of the 2nd flow path part said by this invention. A cross-sectional shape of the space in which the hydraulic oil L defined by the inner surface of the second flow path portion 154 flows in a direction orthogonal to the direction in which the second flow path portion 154 extends is, for example, a circle.

  The direction in which the second flow path portion 154 extends intersects the direction in which the first flow path portion 153 extends. Therefore, the flow path 150 is formed in an L shape by the first and second flow path portions 153 and 154. In the present embodiment, the direction A in which the first flow path portion 153 extends is the direction in which the axial center line Z of the first flow path portion 153 extends. A direction B in which the second flow path portion 154 extends is a direction in which the axial line V of the second flow path portion 154 extends.

  A second inflow port 160 is formed on the opposite side of the head 140 from the outflow port 155. The second inlet 160 is connected to the portion 101 via the second bushing 211 and communicates with the portion 101 so that the hydraulic oil L can be introduced from the portion 101. The head 140 is formed with an introduction flow passage 161 that communicates the second inlet 160 and the housing body 131. The fixing plate 125 is formed with a communication hole 125 b that communicates with the introduction flow path portion 161.

  The hydraulic oil L that has flowed in from the second inflow port 160 flows into the housing main body 131 through the introduction flow path portion 161. The hydraulic oil L that has flowed into the housing body 131 passes through the peripheral wall portion of the element body 121 from the outside toward the inside. The hydraulic oil L that has come out through the communication hole 122b of the inner cylinder 122 is guided to the outflow port 155 through the first and second flow path portions 153 and 154.

  The rectifier 30 is provided in the second flow path portion 154. The rectifier 30 may have the same structure as the rectifier 30 of the first embodiment. FIG. 7 is a cross-sectional view showing a state where the rectifier 30 is disassembled from the head 140. FIG. 8 is a cross-sectional view of the head 140 in the vicinity of the second flow path portion 154, taken along line F8-F8 shown in FIG. As shown in FIG. 8, the rectifier body 31 is formed in a cylindrical shape by folding the second filter medium 175 into a pleat shape. As the second filter medium 175, a filter element having a smaller filtration accuracy than the first filter medium 126 of the filter element 120 and having a small resistance when the hydraulic oil L passes is used. In the first embodiment of the rectifier plate 33, a communication hole 33a that communicates with the inside of the rectifier body 31 is formed in the present embodiment.

  The rectifier 30 in the second flow path part 154 is arranged so that the peripheral wall part 36 of the rectifier body 31 faces the communication port 157 that communicates the first flow path part 153 and the second flow path part 154. Has been. Specifically, the axial line Y of the rectifier 30 is arranged so as to overlap (be the same as) the axial line V of the second flow path part 154, and the axis of the first flow path part 153 The communication port 157 faces the peripheral wall portion 176 along the core Z.

  A holding protrusion 158 that protrudes along the axial line V of the second flow path part 154 is formed at a portion of the second flow path part 154 that faces the communication port 157. The holding protrusion 158 fits into the communication hole 35 of the rectifier second plate 34. By fitting the holding protrusion 158 into the communication hole 35, the posture of the rectifier 30 in the second flow path portion 154 is fixed. The holding protrusion 158 is formed with a relief valve 200 that communicates the introduction flow path 161 and the second flow path 154 (in this embodiment, inside the rectifier 30). When the pressure of the introduction flow path part 161 becomes larger than the predetermined pressure, the relief valve 200 is opened, and the introduction flow path part 161 and the second flow path part 154 communicate with each other.

  As shown in FIG. 8, a gap S <b> 2 through which the hydraulic oil L can flow is formed between the second flow path portion 154 and the rectifier body 31.

  The first bushing 210 has an edge portion 212 that can come into contact with the rectifier 30 in the extending direction of the second flow path portion 154. The edge portion 212 has a function of preventing the rectifier 30 from coming out of the second flow path portion 154.

  Next, the operation of the filter device 110 will be described. As shown in FIG. 5, the hydraulic oil L before being filtered flows into the filter device 110 from the second inlet 160. The hydraulic oil L that has flowed in from the second inlet 160 passes through the introduction flow path portion 161 and flows into the housing main body 131.

  The hydraulic oil L flowing into the housing 130 passes through the filter element 120 from the outside to the inside. At this time, foreign matters such as dust in the hydraulic oil L are collected by the first filter medium 126 constituting the filter element 120. As a result, the hydraulic oil L is filtered.

  The filtered hydraulic oil L goes out of the inner cylinder 122 through the communication hole 122b of the inner cylinder 122. The hydraulic oil L that has come out of the inner cylinder 122 flows into the flow path 150 in the head 140. As shown in FIG. 8, part of the hydraulic oil L that has flowed into the second flow path portion 154 from the communication port 157 collides with the rectifier 30, passes through the rectifier 30 as it is, and exits inside the rectifier 30. The other part of the hydraulic oil L flows toward the position P2 on the opposite side of the communication port 157 in the second flow path part 154 while flowing through the gap S2. At this time, the other part of the hydraulic oil L passes through the rectifier body 31 from the outside to the inside as shown by the arrows in FIG. 8 in the process of flowing through the gap S2 toward the position P2. Most of the hydraulic oil L passes through the rectifier 30 and reaches the inside of the rectifier 30 before reaching the position P2.

  As the hydraulic oil L passes through the rectifier 30, the hydraulic oil L flows downstream without being disturbed, as in the first embodiment. This point will be specifically described. When the hydraulic oil L flows from the first flow path portion 153 into the second flow path portion 154, the flow of the hydraulic oil L is disturbed because the flow of the hydraulic oil L is bent. When the rectifier 30 is not provided, the hydraulic oil L reaches the position P2 and is reflected at the position P2 and flows in various directions. This causes turbulence in the flow.

  However, the presence of the rectifier 30 causes the hydraulic oil L to pass through the rectifier 30 before reaching the position P2, so that less hydraulic oil L hits the inner surface of the second flow path portion 154 and is reflected. . As a result, the flow of the hydraulic oil L is less likely to be disturbed in the second flow path portion 154. In the present embodiment, the same effect as in the first embodiment can be obtained.

  Next, a filter device according to a third embodiment of the present invention will be described with reference to FIG. In addition, the structure which has the same function as 2nd Embodiment attaches | subjects the code | symbol same as 2nd Embodiment, and abbreviate | omits description. In the present embodiment, the flow of the hydraulic oil L in the filter device 110 is reversed with respect to the flow of the hydraulic oil L in the filter device 110 of the second embodiment. As the flow of the hydraulic oil L is reversed, the arrangement of the rectifier 30 is different.

  FIG. 9 is a cross-sectional view showing the filter device 110 of the present embodiment. As shown in FIG. 9, in this embodiment, the hydraulic oil L passes through the filter element 120 from the inside toward the outside. In this embodiment, the 1st flow path part 153 and the 2nd flow path part 154 interchange with respect to 2nd Embodiment. Further, the first inlet 156 at the tip of the protrusion 143 functions as an inlet from the flow path 150 to the housing 130.

  The second inlet 160 of the present embodiment is provided at the position of the outlet 155 of the filter device 110 of the second embodiment, and the hydraulic oil L before being filtered flows in from the second inlet 160. The outlet 155 of this embodiment is provided at the position of the second inlet 160 of the filter device 110 of the second embodiment. The introduction flow path part 161 guides the hydraulic oil L that has passed through the filter element 120 from the inside to the outside to the outlet 155.

  In the present embodiment, the hydraulic oil L before being filtered passes through the rectifier 30. For this reason, the second filter medium 175 constituting the rectifier body 31 of the rectifier 30 has an accuracy that allows dust contained in the hydraulic oil L before filtration to pass therethrough. It is considered not to filter.

  In this embodiment, the same operation and effect as those of the second embodiment can be obtained.

  The present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, you may delete some components from all the components shown by embodiment mentioned above. Furthermore, you may combine the component covering different embodiment suitably.

  The present invention can be used in, for example, a hydraulic circuit or a filter device.

  DESCRIPTION OF SYMBOLS 10 ... Hydraulic circuit (flow path), 12 ... Upstream part (1st flow path part), 30 ... Rectifier, 36 ... Perimeter wall part, 40 ... Rectifier housing (2nd flow path part), 50 ... Inflow port ( 80 ... rectifier mounting structure, 110 ... filter device, 120 ... filter element, 130 ... housing, 131 ... housing main body, 140 ... head, 150 ... channel, 153 ... first channel portion, 154 ... Second flow path portion, 157... Communication port, L .. hydraulic oil (liquid).

Claims (6)

A first flow path section, and a second flow path that is located downstream of the first flow path section, continues to the first flow path section, and extends in a direction intersecting the first flow path section A flow path through which the liquid flows,
A rectifier having a cylindrical shape and allowing the liquid to pass through the peripheral wall,
The rectifier is accommodated in the second flow path portion, and the peripheral wall portion is disposed at a position facing a communication port that communicates the first flow path portion and the second flow path portion. The characteristic rectifier mounting structure. A filter element for filtering the liquid;
A housing that houses the filter element;
A flow path provided in the housing and through which the liquid flows, the first flow path section being located downstream of the first flow path section and continuing to the first flow path section; A flow path comprising a second flow path section extending in a direction intersecting the first flow path section;
A rectifier provided in the housing and rectifying the flow of the liquid,
The rectifier has a cylindrical shape, allows the liquid to pass through the peripheral wall portion, and is accommodated in the second flow path portion so that the peripheral wall portion is connected to the first flow path portion and the second flow path. A filter device, wherein the filter device is disposed at a position facing a communication port communicating with a road portion. The housing is
A housing body for accommodating the filter element therein;
A head mounted on the housing body and provided with an outlet for discharging the liquid filtered by the filter element to the outside;
The flow path is provided in the head;
The first flow path portion is provided in the head and guides the liquid filtered by the filter element into the head.
The filter device according to claim 2, wherein the second flow path unit is provided in the head and communicates the first flow path with the outlet. The housing is
A housing body for accommodating the filter element therein;
A head mounted on the housing body and provided with an inlet through which the liquid flows before being filtered;
The flow path is provided in the head;
The first flow path portion is provided in the head and communicates with the inlet;
The filter device according to claim 2, wherein the second flow path portion is provided in the head and guides the liquid before being filtered to the filter element. The rectifier mounting structure according to claim 1, wherein the peripheral wall portion has a pleated cross-sectional shape. The filter device according to any one of claims 2 to 4, wherein the peripheral wall portion has a pleated cross-sectional shape.

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