JP2018155361A - Fitting structure for filter, and hydraulic clutch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fitting structure for a filter that has simple constitution having an installation space for components made small and also facilitates fitting work.SOLUTION: There is provided a fitting structure for a filter (40) fitted to an oil passage part (64) where circulating oil passes through, and the filter comprises an annular base part (41) fitted to an inner peripheral surface (64a) of the oil passage part and a mesh type filter part (42) fitted to the base part, and also comprises a first groove part (41f) provided on an outer peripheral surface (41a) of the base part, a second groove part (64f) provided on an inner peripheral surface of the oil passage part opposed to the outer peripheral surface of the base part, and a lock member (45) which is fitted to the first groove part and second groove part to lock the filter in the oil passage part. According to this configuration, an installation space of the fitting structure for the filter in an axial direction of the oil passage part (in a flowing direction of oil or in an insertion direction of the filter) can be prevented from becoming large.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an attachment structure of a filter attached to an oil passage portion through which flowing oil passes, and a hydraulic clutch device including the filter attached with the attachment structure.

  A power transmission path of a vehicle or the like is provided with a hydraulic clutch for switching presence / absence of power transmission or adjusting a power transmission amount. As a hydraulic pressure supply device for supplying oil (hydraulic oil) to the hydraulic clutch, an oil strainer that collects oil, an oil pump that sucks oil from the oil strainer and sends it to the hydraulic clutch, and a piston for fastening the hydraulic clutch are provided. 2. Description of the Related Art There is known a hydraulic control device including a piston chamber (oil chamber) to be driven and a pressure regulating valve (linear solenoid valve) that regulates oil to a predetermined pressure (hydraulic pressure) (see, for example, Patent Document 1).

  In the hydraulic control device described in Patent Document 1, oil sucked up by the electric oil pump from the oil strainer is supplied to the piston chamber of the hydraulic piston through the oil passage on the going side, and then returned from the piston chamber to the return side. After being adjusted to a predetermined oil pressure, a part is returned to the oil strainer, and the rest is supplied to lubrication of rotating sliding parts such as bearings and clutches. .

  In the oil passage through which the hydraulic oil discharged from the pump flows, there may be a case where minute foreign matter (contamination) such as fine metal powder generated by a facet or sliding of a metal member is included. However, when such a minute foreign substance flows into the pressure regulating valve, there is a possibility that an abnormality such as a failure may occur in the pressure regulating valve. Therefore, in order to prevent such minute foreign matter from flowing into the pressure regulating valve, it is necessary to take measures such as installing a filter (cleaning member) at an appropriate position in the oil passage.

JP 2011-224857 A

  By the way, in the case where the filter as described above is installed, if the filter comes off after being attached and falls, it becomes impossible to remove minute foreign matters. In addition, if the filter falls and interferes with the operation of other operating members or blocks the oil passage, the device may malfunction. Therefore, in order to prevent the attached filter from being removed, a locking tool for locking the filter is required. As a result, the installation space for parts in the apparatus increases, which may lead to an increase in the size of the apparatus and a complicated installation operation.

  The present invention has been made in view of the above-described problems of the prior art, and an object of the present invention is to mount a filter with a simple configuration with a small installation space for components and facilitating mounting work. An object of the present invention is to provide a hydraulic clutch device including a structure and a filter attached with the attachment structure.

  In order to achieve the above object, a filter mounting structure according to the present invention is a filter (40) mounting structure attached to an oil passage part (64) through which flowing oil passes. A first groove portion (41f) provided on the outer peripheral surface (41a) of the base portion, including an annular base portion (41) fitted to the inner peripheral surface (64a) and a mesh-like filter portion (42) attached to the base portion. ), The second groove (64f) provided on the inner peripheral surface of the oil passage portion facing the outer peripheral surface of the base portion, the first groove portion and the second groove portion, and the filter as an oil passage portion. And a locking member (45) for locking.

  According to the filter mounting structure of the present invention, the filter includes a first groove portion provided on the outer peripheral surface of the filter base portion and a second groove portion provided on the inner peripheral surface of the oil passage portion. By installing a locking member for locking to the first groove portion and the second groove portion, installation of components in the oil flow direction (or filter insertion direction) of the oil passage portion It is possible to prevent the space from becoming large. That is, compared to the conventional structure in which the locking member is installed at a position adjacent to the filter base in the oil flow direction, it is possible to reduce the installation space in the same direction of the components of the filter mounting structure. . Therefore, the installation space of the filter mounting structure can be reduced, and the configuration can be simplified.

  Further, in this filter mounting structure, the locking member is a member in which a part of the elastic annular wire is cut out, and the base portion of the storage portion is stored in the state where the locking member is stored in the first groove portion. By attaching to the inner peripheral surface, the locking member may return to its original shape due to its elasticity and fit into the first groove and the second groove.

  According to this configuration, when the locking member is attached in advance to the first groove provided in the base of the filter, when the base is attached to the inner peripheral surface of the housing portion, the locking member prevents the base from coming off ( Can be applied). That is, if the base of the filter is attached to the inner peripheral surface of the oil passage portion while the locking member is accommodated in the first groove provided at the base of the filter, the positions of the first groove and the second groove (the oil flow) Direction or position in the filter insertion direction), the locking member returns to its original shape due to its elasticity, so that the filter passes through the oil through the first groove and the second groove. It is locked in the part. Therefore, the efficiency of the filter mounting operation can be improved.

  Further, the present invention is a mounting structure of a filter attached to an oil passage portion through which flowing oil passes, and the filter is attached to the annular base portion fitted to the inner peripheral surface of the oil passage portion and the base portion. A projecting engagement portion (43) provided on the outer peripheral surface of the base portion, a groove portion (64f) provided on the inner peripheral surface of the oil passage portion facing the outer peripheral surface of the base portion, and a mesh-shaped filter portion. The filter is locked to the oil passage part by engaging the engaging part with the groove part.

  According to the filter mounting structure having the above-described configuration according to the present invention, the engagement portion for locking the filter in the oil passage portion is provided on the outer peripheral surface of the base portion of the filter. This part is unnecessary. As a result, it is possible to simplify the configuration while reducing the installation space of the filter mounting structure. It is also possible to improve the efficiency of the filter mounting operation.

  Further, in this filter mounting structure, the engaging portion (43) has an inclined surface (43a) in which one end surface (43a) in the insertion direction for inserting the filter into the oil passage portion is inclined with respect to the outer peripheral surface of the base portion. When the filter is inserted into the oil passage part, one end face (43a) of the engagement part gets over the inner peripheral surface of the oil passage part and engages with the groove part, and the engagement part engages with the groove part. In this state, the other end face (43b) in the insertion direction of the engaging portion is locked to the groove portion to prevent the filter from coming off.

  According to this configuration, since the locking portion provided on the filter is configured as described above, it is possible to prevent the filter from coming off simply by mounting the filter in the oil passage portion. Therefore, it is possible to prevent the filter from coming off without providing a separate part. It is also possible to improve the efficiency of the filter mounting operation.

  In addition, the filter mounting structure includes an elastic protruding piece (41m) formed on the outer peripheral surface of the base, and the protruding piece is engaged with the engaging portion (44) in the groove (64g). May be elastically brought into contact with the inner peripheral surface (64a) of the oil passage portion so that the gap between the base portion and the inner peripheral surface of the oil passage portion is sealed by the protruding piece.

  According to this configuration, the projecting piece provided on the base elastically contacts the inner peripheral surface of the oil passage portion so that the gap between the base portion and the oil passage portion is sealed, so that the filter (base portion) and the oil passage It is possible to prevent oil from leaking through these gaps (no oil leaks downstream of the oil passage part without passing through the filter) without providing a separate part for sealing the gap with the part. Therefore, it is possible to secure the function of filtering (cleaning) the oil by the filter while keeping the installation space of the parts of the filter mounting structure small and simplifying the configuration.

  Further, in this filter mounting structure, the protruding piece (41m) is formed to protrude from the outer peripheral surface of the base portion in a direction inclined with respect to the filter insertion direction, and the protruding piece has an inner periphery between the base portion and the oil passage portion. You may comprise so that the clearance of the radial direction and axial direction between surfaces may be sealed.

  According to this structure, the clearance gap between a base and an oil passage part can be sealed more reliably by simple structure.

  Moreover, the present invention provides, as another aspect, a filter mounting structure attached to an oil passage portion through which flowing oil passes, and the filter includes an annular base portion fitted to the inner peripheral surface of the oil passage portion, And a pressure regulating valve accommodating portion (76) provided downstream of the oil passage direction in the oil flow direction, and a pressure regulating valve accommodated in the pressure regulating valve accommodating portion to regulate oil. (8) and a step portion (66) provided on the inner peripheral surface of the oil passage portion, and the filter is attached by being inserted into the oil passage portion from the pressure regulating valve housing portion before housing the pressure regulating valve, The filter base is sandwiched between the pressure regulating valve accommodated in the pressure regulating valve accommodating portion and the step portion, and the filter is fixed.

  According to the filter mounting structure of the above configuration according to the present invention, the filter attached to the oil passage portion can be fixed by the pressure regulating valve accommodated in the pressure regulating valve accommodating portion, so that an additional member for fixing the filter There is no need to provide. Therefore, it is possible to simplify the configuration by reducing the number of parts of the filter mounting structure. In addition, since the filter can be fixed at the same time by accommodating the pressure regulating valve in the pressure regulating valve accommodating portion, it is possible to improve the efficiency of the filter mounting operation.

  The present invention also includes an oil pump (74), a pressure regulating valve (8) for regulating the oil discharged from the oil pump, and a hydraulic clutch (5) engaged with the oil regulated by the pressure regulating valve. In the hydraulic clutch device, the hydraulic clutch is composed of friction engagement elements (53, 54) provided in the power transmission path, a pressing member (57) for applying a pressing force to the friction engagement elements, and oil pressure of the introduced oil. An oil chamber (59) for driving the pressing member, an oil passage portion (64) provided in the oil chamber through which oil discharged from the oil chamber passes, and a filter attached to the oil passage portion ( 40), and the filter mounting structure according to the present invention includes any one of the filter mounting structures according to the present invention.

  According to the hydraulic clutch device of the present invention, the filter mounted in the oil chamber by including any one of the mounting structures according to the present invention as the filter mounting structure mounted on the oil passage portion in the oil chamber of the hydraulic clutch. In addition to being a hydraulic clutch device that can remove minute foreign matter contained in the oil coming out of the oil chamber, it can be configured with a simple structure with a small installation space for components, and can be easily assembled. Can be achieved.

  In addition, the code | symbol in said parenthesis shows the drawing reference number of the corresponding component in embodiment of this invention mentioned later for reference.

  According to the filter mounting structure and the hydraulic clutch device including the filter according to the present invention, the filter mounting operation can be facilitated with a simple configuration with a small installation space.

It is sectional drawing which shows a hydraulic clutch apparatus provided with the attachment structure of the filter which concerns on embodiment of this invention. It is an enlarged view of the A part of FIG. It is a figure which shows the filter of 1st embodiment, and its attachment structure, (a) is an enlarged view of B part of FIG. 2, (b) is an enlarged view of C part of (a). It is a figure for demonstrating the procedure which attaches the filter of 1st embodiment. It is a figure which shows the filter of 2nd embodiment, and its attachment structure, (a) is an enlarged view of the part corresponding to B part of FIG. 2, (b) is an enlarged view of D part of (a). It is a figure which shows the filter of 3rd embodiment, and its attachment structure, (a) is an enlarged view of the part corresponding to B part of FIG. 2, (b) is an enlarged view of E part of (a). It is a figure which shows the filter of 4th embodiment, and its attachment structure. It is a figure for demonstrating the procedure which attaches the filter of 4th embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[First embodiment]
FIG. 1 is a cross-sectional view showing a power transmission device including a hydraulic clutch device according to an embodiment of the present invention. FIG. 2 is an enlarged view of a portion A in FIG. The power transmission device 100 shown in FIG. 1 is configured as a differential mechanism (differential mechanism) for distributing the rotation of the drive shaft 1 to left and right wheels (not shown). The drive shaft 1 is coupled to a propeller shaft (not shown) to transmit a driving force from a drive source (engine) (not shown). The power transmission device 100 is disposed so as to rotate integrally with the drive shaft 1, a driven bevel gear 3 that meshes with the drive bevel gear 2, and a drive bevel gear 3 that is orthogonal to the drive shaft 1. The center shaft 4, the left and right hydraulic clutches 5L and 5R disposed on the left and right of the center shaft 4, and the driving forces transmitted by the left and right hydraulic clutches 5L and 5R are respectively applied to the left and right wheels (not shown). The left and right output shafts 6L and 6R that transmit, the electric oil pump 7 that supplies hydraulic oil (oil) to the piston chambers 59 (FIG. 2) of the left and right hydraulic clutches 5L and 5R, and the piston chambers 59 are discharged. Left and right pressure regulating valves 8L and 8R for regulating oil pressure, and a differential case (case) 9 that covers (accommodates) the differential mechanism. Hereinafter, each configuration will be further described.

  The center shaft 4 is supported by the case 9 via tapered bearings 11 and 12. The center shaft 4 is roughly configured to include a central large diameter portion 4a, left and right middle diameter portions 4b of the large diameter portion 4a, and left and right small diameter portions 4c adjacent to the middle diameter portion 4b. The driven bevel gear 3 is fixed to the large diameter portion 4a, and the entire center shaft 4 rotates integrally. Each small diameter portion 4c of the center shaft 4 is formed with a plurality of spline teeth in the circumferential direction, and is splined so as to rotate integrally with the respective clutch guides 51 (FIG. 2) of the corresponding left and right hydraulic clutches 5L and 5R. ing.

  The left and right hydraulic clutches 5L and 5R are wet multi-plate clutches. Since the left and right hydraulic clutches 5L and 5R have the same configuration, only the right hydraulic clutch 5R will be described here with reference to FIG. For the same reason, in the following description, the subscripts L and R meaning “left” or “right” are omitted unless it is particularly necessary to distinguish them.

  As shown in FIG. 2, a plurality of separator plates (first friction materials) 53 are splined to the inner peripheral surface of the clutch guide 51, which is an input side rotating member, at predetermined intervals in the axial direction, and output side A plurality of friction plates (second friction materials) 54 are splined to the outer peripheral surface of the clutch hub 52, which is a rotating member, at predetermined intervals in the axial direction, and each separator plate 53 and each friction plate 54 has a shaft. The separator plates 53 and the friction plates 54 are stacked so as to be alternately arranged in the direction. A spline portion 55 is formed at the base of the clutch guide 51, and the spline portion 55 is splined to the small diameter portion 4 c of the center shaft 4.

  Similarly, a spline portion 56 is formed at the root of the clutch hub 52. The spline portion 56 is splined to the right output shaft 6R, and the clutch hub 52 is rotatably fixed to the case 58 via the ball bearing 14, and rotates integrally with the right output shaft 6R. On the other hand, the clutch guide 51 and the clutch hub 52 are supported by each other via the ball bearing 13 and can rotate relative to each other.

  The laminated body (friction engagement portion) of the separator plate 53 and the friction plate 54 is driven in the axial direction (leftward in FIG. 2) by the piston 57 when the clutch is engaged. As the piston 57 is driven, the separator plate 53 and the friction plate 54 are frictionally engaged, and the clutch is fastened. The piston 57 is hydraulically driven by the hydraulic pressure of the piston chamber 59 and is controlled so as to obtain a required clutch engagement amount in the friction engagement portion.

  A pressing portion 46 protruding in the axial direction (left direction in the drawing) is formed on the side of the piston 57 facing the friction engagement portion. The pressing part 46 presses the friction engagement part. A first thrust bearing 48 is attached to the tip of the pressing portion 46 to support the friction engagement portion rotatably in the thrust direction. On the other hand, a pressing load receiving portion 47 protruding in the axial direction (right direction in the figure) is formed at a position facing the rear side of the clutch guide 51 in the case 9. The pressing load receiving portion 47 receives the pressing load of the piston 57 applied to the friction engagement portion. A second thrust bearing 49 that rotatably supports the clutch guide 51 in the thrust direction is attached to the distal end portion of the pressing load receiving portion 47.

  The center shaft 4 corresponds to an “input shaft” for the left and right hydraulic clutches 5L and 5R, and the left and right output shafts 6L and 6R correspond to an “output shaft” for the left and right hydraulic clutches 5L and 5R.

  Returning to FIG. 1, the electric oil pump 7 includes a motor portion 71 that generates rotational power, and suctions hydraulic oil (oil) from the oil strainer (not shown) by the rotational power to the left and right hydraulic clutches 5L and 5R. The pump portion 72 has a dual pump structure in which two left and right internal gear pumps 74L and 74R are connected in series on a pump shaft 73. The left internal gear pump 74L pumps oil to the piston chamber 59L of the left hydraulic clutch 5L, and the right internal gear pump 74R pumps oil to the piston chamber 59R of the right hydraulic clutch 5R.

  The left and right pressure regulating valves 8L and 8R are linear solenoid valves (electromagnetic pressure regulating valves). The left and right pressure regulating valves 8L, 8R in the present embodiment are disposed substantially symmetrically beside the piston chambers 59L, 59R of the left and right hydraulic clutches 5L, 5R, respectively. Accordingly, the oil passages 67L and 67R from the left and right piston chambers 59L and 59R to the left and right pressure regulating valves 8L and 8R are respectively configured with the shortest distance. In addition, a filter (secondary filter) for removing minute foreign matters contained in the hydraulic fluid flowing through the oil passages 67L and 67R is provided in the oil passages 67L and 67R between the piston chambers 59L and 59R and the pressure regulating valves 8L and 8R. : Clean member) 40L and 40R are installed.

  Although the detailed illustration is omitted, the pressure regulating valve 8 is configured by connecting a linear solenoid in series with a valve portion for pressure adjustment. The pressure regulating valve 8 passes through the filter 40 from the piston chamber 59 of the hydraulic clutch 5. The oil flowing into the inlet port (not shown) balances the feedback pressure (hydraulic pressure) of the oil discharged from the piston chamber 59, the thrust of the plunger of the linear solenoid, and the elastic force that the spring acts on the valve body. The pressure is adjusted to hydraulic pressure and discharged downstream from an outlet port (not shown) of the pressure regulating valve 8. In addition, since the component which attached | subjected the subscripts L and R to the code | symbols, such as the left and right pressure regulation valves 8L and 8R, is the same structure symmetrically, in the following description, the subscripts L and R in them are distinguished especially Omitted unless necessary.

  On the other hand, a lubricating oil passage 60 that guides oil discharged from the outlet port of the pressure regulating valve 8 to the inside of the hydraulic clutch 5 is formed inside the case 58. That is, in the power transmission device 100 according to the present embodiment, oil discharged from the outlet port of the pressure regulating valve 8 is introduced into the hydraulic clutch 5 through the lubricating oil passage 60, and the introduced oil is rotated by the clutch hub 52. This causes the rotary sliding parts such as the ball bearings 13 and 14 to be lubricated. Therefore, the oil introduced into the hydraulic clutch 5 through the lubricating oil passage 60 is distributed to the ball bearings 13 and 14 efficiently and evenly at a portion facing the ball bearing 13 of the clutch hub 52. Through-holes 52a are provided. Further, a second through hole 52b penetrating the inner peripheral surface and the outer peripheral surface in the radial direction of the clutch hub 52 is provided so that the oil spreads efficiently and evenly on the separator plate 53 and the friction plate 54.

  When the motor is driven, the left and right oil pumps 74L, 74R discharge oil. However, if the left and right pressure control valves 8L, 8R are opened, the oil discharged from the left and right oil pumps 74L, 74R is left and right piston chambers 59L. , 59R, the left and right hydraulic clutches 5L, 5R are not engaged. On the other hand, when the left and right pressure regulating valves 8L, 8R are closed to a predetermined opening, the hydraulic pressure in the left and right piston chambers 59L, 59R located upstream is raised, and the left and right hydraulic clutches 5L, 5R are in a predetermined engagement. The driving force is transmitted to the left and right rear wheels WRL and WRR by engaging with the resultant force.

  Here, the configuration of the filter 40 installed between the piston chamber 59 and the pressure regulating valve 8 and the mounting structure thereof will be described. In the following description, the term “axial direction” refers to the axial direction of the center shaft 4 (the horizontal direction in the figure). 3A and 3B are diagrams for explaining the detailed configuration of the filter 40 and its surroundings. FIG. 3A is an enlarged view of a portion B in FIG. 2, and FIG. 3B is a diagram of FIG. It is an enlarged view of C part. As shown in FIG. 3, a cylindrical recess 63 formed of a circular depression is formed on the outer side (right side in the drawing) of the inner wall 59 a of the piston chamber 59 in the axial direction. A circular opening 65 connected to an oil passage 67 communicating with the pressure regulating valve 8 is formed at the bottom of the recess 63 (the right end in the figure). Therefore, the piston chamber 59 communicates with the pressure regulating valve 8 through the recess 63 and the opening 65 and the oil passage 67. And the filter 40 is attached to the inner peripheral surface 64a of the inlet (oil passage part) 64 of the recessed part 63. FIG.

  The filter 40 has a circular annular thin plate-like base 41 having a circular through-hole 41b in the center, and a mesh shape (projected on one side of the base 41 (the surface on the pressure regulating valve 8 side)). A mesh-shaped filter part (bag-like part) 42 is integrally provided. The filter part 42 consists of a bottomed bag-like cloth material attached so as to close the through hole 41b of the base part 41. This cloth material has a mesh shape with a large number of minute holes, and allows hydraulic oil (liquid) to pass through but does not allow micro foreign substances (contamination) contained in the hydraulic oil to pass through. It is configured to be able to.

  The filter 40 is formed in a size and shape such that the outer peripheral surface (outer peripheral side surface) 41 a of the base portion 41 just fits the inner peripheral surface 64 a of the inlet 64 of the recess 63. An annular groove (first groove) 41 f is formed on the outer peripheral surface 41 a of the base 41. On the other hand, an annular groove (second groove) 64f is also formed on the inner peripheral surface 64a of the inlet 64 of the recess 63 that faces the outer peripheral surface 41a of the base 41. A circlip (locking member) 45 that is accommodated across the groove 41f and the groove 64f is provided. The circlip 45 is made of a substantially C-shaped member (a shape formed by lacking a part of an annular shape) made of metal or synthetic resin having elasticity.

  In the filter 40 having the above configuration, the base 41 is attached to the inner peripheral surface 64a of the inlet 64 of the concave portion 63 by fitting from the piston chamber 59 side. At that time, the groove portion 41f and the concave portion 63 provided on the outer peripheral surface 41a of the base portion 41 are attached. The filter 40 is locked by a circlip (locking member) 45 interposed between the groove 64 f provided on the inner peripheral surface 64 a of the inlet 64. Thereby, the base 41 of the filter 40 is fixed so as not to come off at the inlet 64 of the recess 63. In this state, the filter portion 42 of the filter 40 is disposed in the recess 63 and is disposed in a cross section of a passage (oil passage) that leads from the recess 63 to the oil passage 67 through the opening 65.

  FIG. 4 is a diagram for explaining a procedure for attaching the filter 40. In order to attach the filter 40 to the inlet 64 of the recess 63, the filter 40 is inserted from the inside of the piston chamber 59 toward the inlet 64 as shown in FIG. It is fitted and attached to the peripheral surface 64a. At this time, the circlip 45 is accommodated in the groove 41f of the base 41 with the diameter of the circlip 45 reduced, and the base 41 is fitted into the inner peripheral surface 64a of the inlet 64 of the recess 63 in this state. . Then, when the base portion 41 is fitted into the inlet 64 of the recess 63 and the positions of the groove portion 41f of the base portion 41 and the groove portion 64f of the inlet 64 (the position in the insertion direction (axial direction) of the filter 40) match, the groove portion 41f of the base portion 41. The circlip 45 accommodated in the base is expanded by its elastic force and restored to its original shape, and is fitted across the groove 41f of the base 41 and the groove 64f of the inlet 64 as shown in FIG. Combined state. Thereby, the base 41 of the filter 40 is fixed to the inlet 64 of the recess 63, and the filter 40 is fixed so as not to come out of the recess 63.

  As described above, in the hydraulic clutch device of the present embodiment, the pressure regulating valve 8 (8L, 58R) exits from the piston chamber (59L, 59R) with the filter 40 (40L, 40R) attached in the piston chamber (59L, 59R). 8R) can remove minute foreign substances contained in the oil.

  In this embodiment, the groove (first groove) 41f provided on the outer peripheral surface 41a of the base 41 of the filter 40 and the groove (first groove) provided on the inner peripheral surface 64a of the inlet 64 of the recess 63 that is an oil passage portion. And a circlip (locking member) 45 for locking the filter 40 to the inlet 64 of the recess 63 is provided by fitting the groove 41f and the groove 64f into the recess. It is possible to prevent an increase in the installation space of the filter 40 mounting structure in the axial direction of the 63 inlet 64 (oil flow direction or filter 40 insertion direction). That is, compared to the conventional structure in which the circlip is installed at a position adjacent to the base 41 of the filter 40 in the axial direction, the installation space in the axial direction of the components of the mounting structure of the filter 40 can be reduced. Become. Therefore, the installation space for the mounting structure of the filter 40 can be reduced, and the configuration can be simplified.

  Further, in the present embodiment, the circlip 45 is a member in which a part of the elastic annular wire is cut out, and the base 41 is accommodated in the groove 41 f of the base 41 of the filter 40. Is attached to the inner peripheral surface 64a of the inlet 64 so that the circlip 45 returns to its original shape due to its elasticity and is fitted between the groove 41f of the base 41 and the groove 64f of the inlet 64. Yes.

  According to this configuration, the circlip 45 is attached in advance to the groove 41 f provided in the base 41 of the filter 40, so that when the base 41 is attached to the inner peripheral surface 64 a of the inlet 64 of the recess 63, It is possible to prevent the base 41 from coming off (stopping off). That is, if the base 41 of the filter 40 is attached to the inner peripheral surface 64a of the inlet 64 of the recess 63 in a state where the circlip 45 is accommodated in the groove 41f provided in the base 41 of the filter 40, the axial direction of the groove 41f and the groove 64f ( When the position of the filter 40 in the insertion direction is matched, the circlip 45 is restored to its original shape by its elasticity, so that the filter 40 is fitted into the groove 41f and the groove 64f, and the filter 40 enters the inlet 64 of the recess 63. Locked. Therefore, the efficiency of the attachment work of the filter 40 can be achieved.

  Further, according to the mounting structure of the present embodiment, when the base portion 41 of the filter 40 is slid in the axial direction and attached to the inlet 64 of the recess 63, the outer peripheral end (outer peripheral surface) of the circlip 45 is the inner peripheral surface of the inlet 64. The inner peripheral surface 64a is slightly scraped off by the circlip 45 by slidingly contacting the 64a. Thereby, metal fine shavings (metal powder) are generated. However, the generated shavings are accommodated in the groove 64f when the circlip 45 is fitted into the groove 64f, and therefore do not fall into the piston chamber 59 or the recess 63. That is, in this mounting structure, the groove 64 f formed on the inner peripheral surface 64 a of the inlet 64 of the recess 63 functions as a space for storing the shavings on the inner peripheral surface 64 a by the circlip 45. Thereby, it can prevent effectively that metal powder mixes into the pressure regulation valve 8 from the piston chamber 59 and the recessed part 63 in which oil distribute | circulates.

  If the circlip 45 is made of a material softer than metal such as a synthetic resin material or a hard rubber material, the circlip 45 does not cause the inner peripheral surface 64a of the inlet 64 of the recess 63 to be scraped off. Further, it is possible to more effectively prevent the metal powder from being mixed into the pressure regulating valve 8.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the description of the second embodiment and the corresponding drawings, the same or corresponding components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted below. Further, matters other than those described below and matters other than those illustrated are the same as those in the first embodiment. This also applies to other embodiments described below.

  FIG. 5 is a view showing a filter and its mounting structure according to the second embodiment. FIG. 5 (a) is an enlarged view of a portion corresponding to the portion B in FIG. 2, and FIG. ) Is an enlarged view of a D portion. The filter 40-2 of the present embodiment includes a protruding engagement piece (engagement portion) 43 provided on the outer peripheral surface 41a of the base portion 41 in place of the circlip 45 of the first embodiment. The engaging piece 43 is made of a member (part) having elasticity such as rubber, and is made of an annular protrusion formed in a belt shape along the outer peripheral surface 41 a of the annular base 41. As shown in FIG. 5 (b), the cross-sectional shape of the engagement piece 43 is such that one side surface (surface on the filter portion 42 side) of the side surfaces (surfaces on both sides in the left-right direction in the figure) 43a, 43b on both sides of the base portion 41 ) 43a is inclined. On the other hand, the other side surface 43b is a surface erected perpendicularly to the outer peripheral surface 41a of the base portion 41 toward the outer diameter side. Thereby, the cross section of the engagement piece 43 has a substantially triangular shape with the filter portion 42 side as a hypotenuse. In addition, the base 41 may include the engaging piece 43 as a whole by an elastic member such as rubber, or only the portion of the engaging piece 43 in the base 41 may be formed by an elastic member.

  On the other hand, an annular groove 64f is provided on the inner peripheral surface 64a of the inlet 64 of the recess 63 that faces the outer peripheral surface 41a of the base 41, as in the first embodiment. The groove portion 64f is a recess whose cross-sectional shape is substantially rectangular (rectangular).

  Also in this embodiment, in order to attach the filter 40-2 to the inlet 64 of the recess 63, the filter 40-2 is inserted from the inside of the piston chamber 59 toward the recess 63, and the base 41 is fitted to the inlet 64 of the recess 63. Install. At this time, when the base portion 41 is fitted into the inlet 64 of the concave portion 63, the engagement piece 43 of the outer peripheral surface 41 a of the base portion 41 is pushed toward the inner diameter side by the inner peripheral surface 64 a of the inlet 64 of the concave portion 63. The diameter of the piece 43 is reduced. In this way, the engaging piece 43 slides in the axial direction inside the inlet 64 of the recess 63, so that the base 41 fits into the inlet 64 of the recess 63. When the positions of the engagement piece 43 of the base 41 and the groove 64f of the inlet 64 coincide (position in the axial direction), the diameter is reduced by being pushed by the inner peripheral surface 64a of the inlet 64 of the recess 63 until then. The engagement piece 43 is expanded in diameter by the elastic force, and as shown in FIG. 5, the engagement piece 43 is engaged with the groove 64f. That is, the engagement piece 43 gets over the inner peripheral surface 64a of the inlet 64 of the recess 63 by one end surface (inclined surface) 43a and engages with the groove 64f. In this state, the base 41 of the filter 40-2 is fixed to the inlet 64 of the recess 63, and the filter 40-2 is fixed so as not to come out of the recess 63. In addition, the other end face 43b of the engagement piece 43 is brought into contact with and locked to the inner side surface of the opposing groove portion 64f, whereby the filter 40-2 is prevented from coming off. Note that, at the above-described fixed position, the end surface (the right side in the drawing) of the base 41 of the filter 40 abuts on a stepped portion 68 (see FIG. 5B) formed between the recess 63 and the inlet 64. In this position, the movement of the base 41 toward the back side is restricted.

  In the present embodiment, the protrusion-shaped engaging piece 43 provided on the outer peripheral surface 41a of the base 41 of the filter 40-2 and the inner peripheral surface 64a of the inlet 64 of the recess 63 facing the outer peripheral surface 41a of the base 41 are provided. A groove portion 64f is provided, and the engaging piece 43 is engaged with the groove portion 64f so that the filter 40-2 is locked to the inlet 64 of the recess 63. As described above, the engagement piece 43 for locking the filter 40-2 to the inlet 64 of the recess 63 is integrally provided on the outer peripheral surface 41a of the base 41 of the filter 40-2, whereby the filter 40-2 is engaged. A separate part for stopping is unnecessary. As a result, the number of parts of the mounting structure of the filter 40-2 can be reduced to simplify the configuration. In addition, since the number of parts is small, it is possible to improve the efficiency of the mounting operation of the filter 40-2.

  Further, in the present embodiment, the engagement piece 43 is formed as an inclined surface in which the end surface 43 a on the back side in the insertion direction for inserting the filter 40-2 into the inlet 64 of the recess 63 is inclined with respect to the outer peripheral surface 41 a of the base 41. When the filter 40-2 is inserted into the inlet 64 of the recess 63, the end face 43a of the engagement piece 43 gets over the inner peripheral surface 64a of the inlet 64 of the recess 63 and engages with the groove 64f. In a state where 43 is engaged with the groove portion 64f, the end surface 43b on the near side in the insertion direction of the engagement piece 43 is locked to the end surface of the opposite groove portion 64f to prevent the filter 40-2 from coming off. Yes.

  According to this configuration, since the engaging piece 43 provided on the filter 40-2 is configured as described above, the filter 40-2 can be prevented from coming off simply by attaching the filter 40-2 to the inlet 64 of the recess 63. Can be applied. Therefore, it is possible to improve the efficiency of the mounting operation of the filter 40-2.

[Third embodiment]
Next, a third embodiment of the present invention will be described. 6A and 6B are views showing the filter 40-3 of the third embodiment and its mounting structure. FIG. 6A is an enlarged view of a portion corresponding to the portion B in FIG. 2, and FIG. It is an enlarged view of E section of 6 (a). The filter 40-3 of the present embodiment includes a protruding piece (seal portion) 41m that protrudes in an eaves shape and is formed on the outer peripheral surface 41a of the base portion 41. The projecting piece 41m is formed on the end portion on the opposite side of the filter portion 42 in the axial direction on the outer peripheral surface 41a (the end portion on the left side in the figure), and has an annular shape protruding from the outer peripheral surface 41a of the base portion 41 to the outer diameter side It is formed as a thin plate portion. The protruding piece 41m has a shape that is gradually inclined in the axial direction toward the filter portion 42 (the right side in the figure) as the cross-sectional shape is toward the outer diameter side. The protruding piece 41m is made of a member (part) having elasticity (flexibility) such as rubber.

  Further, the base portion 41 of the filter 40-3 is provided with an engaging projection (engaging portion) 44 formed of an annular projection protruding on the outer diameter side provided on the outer peripheral surface 41a. The engagement protrusion 44 is made of a member (part) having elasticity (flexibility) such as rubber, has a substantially semicircular cross section, and protrudes over the entire circumference of the outer peripheral surface 41 a of the base 41. On the other hand, on the inner peripheral surface 64a of the inlet 64 of the recess 63, a groove portion 64g with which the engagement protrusion 44 is engaged is formed. The groove portion 64g is formed by an annular groove having a substantially semicircular arc shape in cross-section similar to the cross-sectional shape of the engagement protrusion 44.

  In this embodiment, in order to attach the filter 40-3 to the inlet 64 of the recess 63, the filter 40-3 is inserted into the recess 63 from the inside of the piston chamber 59, and the base 41 is fitted and attached to the inlet 64 of the recess 63. At this time, when the base 41 is fitted into the inlet 64 of the recess 63, the engagement protrusion 44 of the outer peripheral surface 41 a of the base 41 is pushed to the inner diameter side by the inner peripheral surface 64 a of the inlet 64 of the recess 63, and the diameter dimension thereof. Becomes a reduced state, and slides inside the inlet 64 of the recess 63. As a result, the base 41 fits into the inlet 64 of the recess 63, and when the position of the engaging protrusion 44 of the base 41 and the position of the groove 64g of the inlet 64 (the position in the axial direction) coincide, The engagement protrusion 44 whose diameter has been reduced by being pushed by the peripheral surface 64a is expanded in diameter by its elastic force, and the engagement protrusion 44 is engaged with the groove 64g of the inlet 64. That is, the engagement protrusion 44 gets over the inner peripheral surface 64a of the inlet 64 of the recess 63 and engages with the groove 64g. In this state, the base 41 of the filter 40-3 is fixed to the inlet 64 of the recess 63, and the filter 40-3 is fixed so as not to come out of the recess 63.

  Further, in a state where the base 41 of the filter 40-3 is fixed to the inlet 64 of the recess 63, as shown in FIG. 6B, the protruding piece 41m of the base 41 is provided around the inlet 64 of the recess 63. The inner surface of the chamber 59 (the end surface facing the piston chamber 59 side in the axial direction) 59a is pressed and brought into contact (elastic contact). That is, with the engaging protrusion 44 of the base 41 engaged with the groove 64g of the inlet 64, the tip of the protruding piece 41m is pressed against the inner surface 59a of the piston chamber 59, so that the protruding piece 41m is slightly elastic. Elastically touches in a bent state. As a result, the protruding piece 41m is in a state where the gap between the base 41 and the inlet 64 of the recess 63 is closed (sealed). Therefore, the filter 40-3 can be attached in a state where the gap between the base 41 of the filter 40-3 and the inlet 64 of the recess 63 is sealed without providing a separate sealing member.

  In the present embodiment, there is provided an annular projecting piece 41m having elasticity formed on the outer peripheral surface 41a of the base 41, and the projecting piece 41m is provided at the inlet 64 of the recess 63 with the engaging projection 44 engaged with the groove 64g. By elastic contact, the gap between the base 41 and the inner peripheral surface 64a of the inlet 64 of the recess 63 is sealed by the protruding piece 41m.

  According to this configuration, the protruding piece 41m provided on the base 41 of the filter 40-3 is in elastic contact with the inlet 64 of the recess 63, so that the gap between the base 41 and the inlet 64 of the recess 63 is sealed. Thus, oil is leaked through these gaps without providing a separate part for sealing the gap between the filter 40-3 (base 41) and the inlet 64 of the recess 63 (without the oil passing through the filter 40). Leakage to the downstream side). Therefore, the oil filtration (cleaning) function by the filter 40-3 can be ensured while reducing the installation space of the filter mounting structure and simplifying the configuration.

  Further, in this filter mounting structure, the protruding piece 41m is formed so as to protrude in a direction inclined with respect to the axial direction (insertion direction of the filter 40-3), and the base 41 and the recess 63 are formed by the protruding piece 41m. A gap in the radial direction and the axial direction between the inlet 64 is sealed. According to this configuration, the gap between the base 41 of the filter 40-3 and the inlet 64 of the recess 63 can be more reliably sealed with a simple configuration.

[Fourth embodiment]
Next, a fourth embodiment of the present invention will be described. FIG. 7 is a diagram showing the filter 40-4 and its mounting structure of the fourth embodiment. The filters 40, 40-2, and 40-3 of the first to third embodiments are all inserted and attached to the inlet 64 of the recess 63 from the piston chamber 59 side, whereas the filter 40 of the present embodiment. -4 is attached by being inserted into the recess 63 from the pressure regulating valve 8 side opposite to the piston chamber 59.

  A step portion 66 is formed at the inlet 64 of the recess 63 such that the diameter of the piston chamber 59 is smaller than that of the recess 63. And the internal peripheral surface of the recessed part 63 is formed as the same diameter dimension from the position of the step part 66 to the position which reaches the pressure regulation valve 8 of the back | inner side (right side of a figure). Further, the base 41 of the filter 40-4 has an outer peripheral surface 41a having a slightly smaller diameter than the inner peripheral surface of the recess 63, and no protrusions or grooves are formed on the outer peripheral surface 41a. The surface 41a is formed as an arcuate curved surface.

  FIG. 8 is a diagram for explaining a procedure for attaching the filter 40-4 of the present embodiment. In order to attach the filter 40-4 to the recess 63, as shown in FIG. 8A, before attaching the pressure regulating valve 8, the pressure regulating valve accommodating portion 76, which is a location where the pressure regulating valve 8 is accommodated, is filtered. Is inserted into the recess 63. At that time, the filter portion 42 of the filter 40-4 is inserted in a state where it is positioned on the piston chamber 59 side with respect to the base portion 41. And the further insertion of the filter 40-4 is blocked | prevented because the end surface (left end surface of a figure) of the base part 41 contact | abuts to the step part 66 of the recessed part 63 of the base 41. FIG. In this state, the pressure regulating valve 8 is attached to the pressure regulating valve accommodating portion 76 by being inserted from the front side to the far side in the drawing. As a result, as shown in FIG. 8B, the outer peripheral surface (outer peripheral side surface) 8a of the pressure regulating valve 8 abuts against the end surface (right end surface in the figure) of the base 41 of the filter 40-4. Thus, the base portion 41 of the filter 40-4 is sandwiched between the step portion 66 and the outer peripheral surface 8a of the pressure regulating valve 8. Therefore, the filter 40-4 is positioned and fixed.

  In the present embodiment, the filter 40-4 attached to the inlet 64 of the recess 63 can be fixed by the pressure regulating valve 8 accommodated in the pressure regulating valve accommodating portion 76, so that an additional member for fixing the filter 40-4 is provided. There is no need to provide. Therefore, it is possible to simplify the configuration while reducing the number of parts of the mounting structure of the filter 40-4. Further, since the filter 40-4 can be fixed at the same time by accommodating the pressure regulating valve 8 in the pressure regulating valve accommodating portion 76, it is possible to increase the efficiency of the mounting operation of the filter 40-4.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible.

DESCRIPTION OF SYMBOLS 1 Drive shaft 2 Drive bevel gear 3 Driven bevel gear 4 Center shaft 5 (5L, 5R) Hydraulic clutch 6 (6L, 6R) Output shaft 7 Electric oil pump 8 (8L, 8R) Pressure regulating valve 8a Outer peripheral surface 9 Case 11 Tapered bearing 12 Taper Bearing 13 Ball bearing 14 Ball bearing 40 to 40-4 Filter 41 Base 41a Outer peripheral surface 41b Through hole 41f Groove 41m Projection piece (seal part)
42 Filter part (bag-like part)
43 Engagement piece (engagement part)
43a One end face (inclined face)
43b The other end surface 44 Engaging protrusion (engaging part)
45 Circlip (locking member)
46 Pressing portion 47 Pressing load receiving portion 48 Thrust bearing 49 Thrust bearing 51 Clutch guide 52 Clutch hub 52a Through hole 52b Through hole 53 Separator plate (first friction material)
54 Friction plate (second friction material)
55 Spline part 56 Spline part 57 Piston (pressing member)
58 Case 59 (59L, 59R) Piston chamber (oil chamber)
59a Inner surface 60 Lubricating oil path 63 Recess 64 Inlet (oil passage part)
64a inner peripheral surface 64f groove part 64g groove part 65 opening part 66 step part 67 (67L, 67R) oil passage 68 step part 71 motor part 72 pump part 73 pump shaft 74L, 74R oil pump 76 pressure regulating valve accommodating part 100 power transmission device WRL, WRR Rear wheel

Claims (8)

A filter mounting structure attached to an oil passage portion through which the circulating oil passes,
The filter includes an annular base portion fitted to the inner peripheral surface of the oil passage portion, and a mesh-like filter portion attached to the base portion,
A first groove provided on the outer peripheral surface of the base, a second groove provided on an inner peripheral surface of the oil passage portion facing the outer peripheral surface of the base, the first groove and the second groove And a locking member for locking the filter to the oil passage part. The locking member is a member in which a part of an annular wire having elasticity is cut out,
By attaching the base to the inner peripheral surface of the housing portion in a state where the locking member is housed in the first groove portion, the first groove portion is returned to its original shape by its elasticity. The filter mounting structure according to claim 1, wherein the filter is fitted over the second groove portion. A filter mounting structure attached to an oil passage portion through which the circulating oil passes,
The filter includes an annular base portion that is fitted to the inner peripheral surface of the oil passage portion, and a mesh-like filter portion attached to the base portion.
A projecting engagement portion provided on the outer peripheral surface of the base portion, and a groove portion provided on the inner peripheral surface of the oil passage portion facing the outer peripheral surface of the base portion,
The filter mounting structure, wherein the filter is locked to the oil passage portion when the engaging portion engages with the groove portion. The engaging portion is formed as an inclined surface in which one end surface in the insertion direction for inserting the filter into the oil passage portion is inclined with respect to the outer peripheral surface of the base portion,
When inserting the filter into the oil passage part, the one end surface of the engagement part gets over the inner peripheral surface of the oil passage part and engages with the groove part,
2. The filter according to claim 1, wherein the other end face of the engaging portion in the insertion direction is locked to the groove portion in a state where the engaging portion is engaged with the groove portion. 3. A filter mounting structure according to item 3. An annular projecting piece having elasticity formed on the outer peripheral surface of the base portion;
In a state where the engaging portion is engaged with the groove portion, the protruding piece elastically contacts the inner peripheral surface of the oil passage portion, so that a gap between the base portion and the inner peripheral surface of the oil passage portion is formed by the protruding piece. The filter mounting structure according to claim 4, wherein the filter is in a sealed state. The protruding piece is formed to protrude from the outer peripheral surface of the base in a direction inclined with respect to the insertion direction of the filter,
The filter fixing structure according to claim 5, wherein the projecting piece is configured to seal a gap in a radial direction and an axial direction between the base portion and an inner peripheral surface of the oil passage portion. A filter mounting structure attached to an oil passage portion through which the circulating oil passes,
The filter includes an annular base portion fitted to the inner peripheral surface of the oil passage portion, and a mesh-like filter portion attached to the base portion,
A pressure regulating valve housing provided on the downstream side in the oil flow direction from the oil passage;
A pressure regulating valve that is accommodated in the pressure regulating valve accommodating portion and regulates the oil;
A step portion provided on the inner peripheral surface of the oil passage portion,
The filter is attached by inserting from the pressure regulating valve housing portion into the oil passage portion before housing the pressure regulating valve,
A filter mounting structure characterized in that a base portion of the filter is sandwiched between the pressure regulating valve housed in the pressure regulating valve housing portion and the stepped portion and the filter is fixed. An oil pump,
A pressure regulating valve for regulating the oil discharged from the oil pump;
In a hydraulic clutch device comprising: a hydraulic clutch that engages with oil regulated by the pressure regulating valve;
The hydraulic clutch includes a friction engagement element provided in a power transmission path, a pressing member that applies a pressing force to the friction engagement element, and an oil chamber for driving the pressing member with the oil pressure of the introduced oil. And comprising
An oil passage portion provided in the oil chamber through which oil discharged from the oil chamber passes;
A filter attached to the oil passage part,
A hydraulic clutch device comprising the attachment structure according to any one of claims 1 to 7 as the attachment structure of the filter.

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