CN108571408B - Assembling device and assembling method - Google Patents
Assembling device and assembling method Download PDFInfo
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- CN108571408B CN108571408B CN201710135282.XA CN201710135282A CN108571408B CN 108571408 B CN108571408 B CN 108571408B CN 201710135282 A CN201710135282 A CN 201710135282A CN 108571408 B CN108571408 B CN 108571408B
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- inner peripheral
- guide plate
- outer peripheral
- guide
- peripheral member
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
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- General Engineering & Computer Science (AREA)
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Abstract
The invention provides an assembling device and an assembling method, which can assemble an outer peripheral member to an inner peripheral member without damaging an oil seal mounted on the outer peripheral surface of the inner peripheral member. The assembling device includes: a base portion supporting the inner peripheral side member in a state in which the oil seal and the locking piece of the inner peripheral side member are exposed; a guide plate having a guide through hole having an inner diameter capable of sliding in contact with a lip tip portion of the oil seal, and a plurality of support through holes located on an outer peripheral side of the guide through hole; and a plurality of guide struts arranged around the base portion, having distal end portions inserted through the strut through holes of the guide plate and inclined so as to be away from the inner peripheral member from the distal end portions toward the base portion, wherein the guide plate has an opposed surface supporting an open end portion of a cylindrical outer peripheral member having an inner peripheral surface slidable with an outer peripheral surface of the inner peripheral member around the guide through holes, and is configured by a plurality of guide plate portions divided around an axis line by a portion where the strut through holes are provided.
Description
Technical Field
The present invention relates to an assembling apparatus and an assembling method, and more particularly to an assembling apparatus and an assembling method for a starting pump (priming pump) provided between a fuel tank and a fuel injection pump in a fuel supply system of a diesel engine mounted on an automobile.
Background
Conventionally, in a fuel supply system for a diesel engine, a starter pump is provided between a fuel tank and a fuel injection fuel pump (for example, see patent document 1).
For example, as shown in fig. 12 (a), (B), and 13, the priming pump 1 is a manual pump, and includes a cylindrical shaft portion 2 and a bottomed cylindrical operation portion 3. Fig. 12 (a) shows a state in which the operation portion 3 is not completely assembled to the shaft portion 2 in the starting pump 1, and fig. 12 (B) shows a state in which the operation portion 3 is completely assembled to the shaft portion 2. Fig. 13 is a cross-sectional view for explaining a state where the operation portion 3 of the primer pump 1 is attached to the shaft portion 2 using a conventional jig (jig).
The starter pump 1 performs a pump operation by an operator moving the operation portion 3 in an arrow ab direction in a state where the lower end portion 2w of the shaft portion 2 is attached to a fuel pump (not shown) (see, for example, document 1). The arrow a direction is defined as the upper side, and the arrow b direction is defined as the lower side.
The shaft portion 2 as the inner peripheral member has a through hole 2h serving as a fuel flow path. A valve body 21 is provided at an upper opening end (arrow a direction) of the shaft portion 2 so as to close the through hole 2h, and the valve body 21 is slidable in the vertical direction (arrow ab direction) inside the through hole 2 h. An upper end portion of the pump spring 22 is attached to the valve body 21, and a lower end portion of the pump spring 22 is attached to a step portion 2d formed by reducing an inner diameter of the through hole 2h of the shaft portion 2.
A spring seat 23 is integrally fixed to an outer peripheral portion of the upper end portion 2u of the shaft portion 2, and the spring seat 23 has an outer diameter slightly larger than the outer diameter of the shaft portion 2. The spring seat 23 is a cylindrical member formed of, for example, resin, and centered on the axis x. In the shaft portion 2, the lower end portion of the operation spring 31 of the operation portion 3 is attached to the upper end portion 2u of the shaft portion 2 by an annular space formed between the upper end portion 2u of the shaft portion 2 and the opening portion 23k of the spring seat 23.
A large diameter portion 2t is formed in a substantially central portion of the shaft portion 2 in the vertical direction (arrow ab direction), and the large diameter portion 2t has an outer diameter larger than the outer diameter of the lower end portion 2w of the shaft portion 2 and protrudes in a convex shape toward the outer peripheral side. An oil seal 40 is attached to a stepped surface 2td on the upper side (arrow a direction) of the large diameter portion 2t and an outer peripheral surface 2tg of the shaft portion 2 on the upper side (arrow a direction) of the large diameter portion 2 t.
As shown in fig. 13, the oil seal 40 includes a reinforcing ring 41 having an L-shaped cross section, and a seal lip 42 formed of an elastic body and formed integrally with the reinforcing ring 41. In a state where the oil seal 40 is attached to the shaft portion 2, the seal lip portion 42 protrudes slightly to the outer peripheral side than the outer peripheral surface of the large diameter portion 2 t.
Further, an engaging piece 50 is attached to the lower side (arrow b direction) of the large diameter portion 2t of the shaft portion 2 so as to be slidable in the vertical direction (arrow ab direction), and the engaging piece 50 is made of, for example, resin and the like and engages the opening end portion 3c of the operating portion 3 with a stepped surface on the lower side (arrow b direction) of the large diameter portion 2t and an outer peripheral surface 2g of the shaft portion 2 on the lower side (arrow b direction) than the large diameter portion 2 t.
The locking piece 50 is an annular member centered on the axis x, and includes a locking body 50a and a locking claw 50 b. The locking body 50a is a cylindrical member fixed to the outer peripheral surface 2g of the shaft portion 2 around the axis x, and includes an annular convex portion 50ax having a triangular cross section protruding toward the outer peripheral side at the lower end portion on the lower side (in the direction of arrow b).
The locking claw 50b is an annular member having a substantially triangular cross section and formed integrally with the locking body 50a on the upper side (in the direction of arrow a) of the locking body 50 a. Therefore, when the operation portion 3 is pressed downward (in the arrow b direction), the locking recess 3k formed in the inner peripheral surface of the operation portion 3 is locked to the locking claw 50b of the locking piece 50. At the same time, the locking convex portion 3d adjacent to the locking concave portion 3k of the operation portion 3 is locked to the concave portion 50p formed by the locking claw 50b and the locking body 50 a.
The operation portion 3, which is an outer peripheral member, has an inner peripheral surface slidable relative to the outer peripheral surface of the spring seat 23 of the shaft portion 2, is formed in a bottomed cylindrical shape, and has an operation spring 31 mounted in an inner space thereof. Specifically, the upper end of the operation spring 31 is attached to a spring receiving portion 3f provided on the inner peripheral side of the top portion 3e of the operation portion 3, and the lower end of the operation spring 31 is attached to the bottom portion of the spring seat 23. The spring receiving portion 3f is integrally formed with a columnar valve body pressing member 3g, and the valve body pressing member 3g protrudes downward (in the arrow b direction) from the center of the spring receiving portion 3 f.
The inner peripheral surface 3n of the operation portion 3 is a sliding surface which comes into contact with the lip tip 42a of the seal lip 42 of the oil seal 40 and slides relative to the lip tip 42a in accordance with the vertical movement (arrow ab direction) of the operation portion 3. A locking concave portion 3k and a locking convex portion 3d for locking the locking claw 50b of the locking piece 50 are formed on the inner peripheral surface near the opening end portion 3c of the operation portion 3.
As shown in fig. 13, in the starting pump 1 having such a structure, the outer peripheral surface 23g of the spring holder 23 integrally fixed to the shaft portion 2 and the inner peripheral surface 3n of the operating portion 3 are slidably attached.
Specifically, in the starting pump 1, when the operation portion 3 moves upward (in the direction of arrow a) in the same direction as the locking piece 50, the locking claw 50b of the locking piece 50 is locked by the large diameter portion 2t and restricted from moving. When the operation portion 3 moves to the lowermost side (arrow b direction) together with the locking piece 50, the spring receiving portion 3f abuts on the opening end of the upper end portion 2u of the shaft portion 2, and the movement of the operation portion 3 to the lower side (arrow b direction) is restricted.
The starter pump 1 moves the valve element 21 of the shaft portion 2 downward (in the direction of arrow b) by the valve element pressing member 3g from an initial state in which the locking piece 50 of the operation portion 3 is positioned near the large diameter portion 2t to a state in which the operation portion 3 moves downward (in the direction of arrow b) against the urging force of the operation spring 31. Then, the operation portion 3 is pushed back to the upper side (arrow a direction) by the urging force of the pump spring 22. By repeating such an operation, the pump operation for starting the pump 1 is performed.
Documents of the prior art
Patent document
Patent document 1: japanese examined patent publication (Kokoku) No. 7-92027
Disclosure of Invention
In the starting pump 1 having the above-described configuration, there are the 1 st method and the 2 nd method for assembling the operation portion 3 to the shaft portion 2 to which the oil seal 40 is attached. The 1 st method is a method of pressing the operating portion 3 downward (in the direction of arrow b) and directly pressing the oil seal 40 into the inner peripheral surface 3n of the operating portion 3, and is not a method of using a guide jig JG10 as shown in fig. 13. The 2 nd method is a method in which the oil seal 40 is pressed into the inner peripheral surface of the operation portion 3 by pressing the operation portion 3 downward (in the arrow b direction) with the guide jig JG 10.
However, in the method 1, when the operating portion 3 is pressed downward (in the direction of the arrow b), the opening end portion 3c of the operating portion 3 comes into contact with the lip tip 42a of the seal lip portion 42 of the oil seal 40, and the seal lip portion 42 is pressed and expanded to the outer peripheral side. This may cause the tension spring 42g attached to the seal lip 42 to fall off.
In the method 2, the operating portion 3 is pressed downward (in the direction of arrow b) while the seal lip 42 is prevented from being pressed and expanded to the outer peripheral side by the guide jig JG 10. Thus, even if the opening end portion 3c of the operating portion 3 contacts the lip tip 42a of the seal lip 42, the presence of the guide jig JG10 prevents the seal lip 42 from being pressed and expanded to the outer peripheral side.
However, in the method 2, the guide jig JG10 may abut against the locking piece 50, and the guide jig JG10 and the operation unit 3 may not be pressed further downward (in the direction of arrow b). Therefore, the locking concave portion 3k and the locking convex portion 3d of the operation portion 3 cannot be engaged with the locking piece 50, and the operation portion 3 cannot be completely attached to the shaft portion 2.
The present invention has been made in view of the above-described problems, and an object thereof is to provide an assembling device and an assembling method capable of assembling an outer peripheral member to an inner peripheral member without damaging an oil seal attached to an outer peripheral surface of the inner peripheral member.
In order to achieve the above object, an assembling device according to the present invention includes: a base portion for supporting an inner peripheral side member having an annular oil seal and an annular retaining piece attached to an outer peripheral surface, the base portion supporting the inner peripheral side member in a state in which the oil seal and the retaining piece are exposed; a guide plate provided with a guide through hole having an inner diameter capable of sliding contact with a lip tip portion of the oil seal of the inner peripheral member, and a plurality of support column through holes located on an outer peripheral side of the guide through hole; and a plurality of guide struts arranged around the base portion with the base portion as a center, a tip end portion of each of the guide struts penetrating the strut through hole of the guide plate, the plurality of guide struts being inclined so as to be away from the inner peripheral member from the tip end portion toward a base portion, the guide plate having an opposing surface supporting an open end portion of a cylindrical outer peripheral member around the guide through hole, the outer peripheral member having an inner peripheral surface slidable with respect to the outer peripheral surface of the inner peripheral member, the guide plate being composed of a plurality of guide plate portions divided around the axis line by a portion where the strut through hole is provided.
In the present invention, the assembling device further includes a pressing portion that is placed on the guide plate in a state in which the outer peripheral member is pressed against the inner peripheral member while sliding an inner peripheral surface of the outer peripheral member and an outer peripheral surface of the inner peripheral member.
In the present invention, the guide through hole of the guide plate is formed in a tapered cross section having a diameter gradually increased toward the base portion side in a state of being disposed to face the base portion.
The assembling method of the present invention is characterized by including: an inner peripheral side member supporting step of supporting an inner peripheral side member having an annular oil seal attached to an outer peripheral surface and an annular locking piece on a base portion in a state where the oil seal and the locking piece are exposed; an outer peripheral member supporting step of supporting an open end of an outer peripheral member with an opposing surface of a guide plate using the guide plate in a state where the outer peripheral member is slidably attached to the inner peripheral member, wherein the guide plate is provided with a guide through-hole having an inner diameter capable of sliding contact with a lip tip of the oil seal of the inner peripheral member and a plurality of strut through-holes located on an outer peripheral side of the guide through-hole, and the outer peripheral member has an inner peripheral surface capable of sliding relative to the outer peripheral surface of the inner peripheral member in a state where the outer peripheral member is disposed to face the inner peripheral member; a pressing step of pressing the outer peripheral member and the guide plate against the inner peripheral member by using a plurality of guide plate portions formed by dividing the guide plate around the axis line by a portion provided with the support through hole and a plurality of guide stays arranged around the base portion, having tip end portions inserted through the support through holes of the guide plate, and inclined so as to be apart from the inner peripheral member from the tip end portions toward the base portion; and an assembling step of, when the guide plate is pressed against the inner peripheral member, moving the outer peripheral member so that the opening end of the outer peripheral member does not abut against the facing surface of the guide plate by separating the plurality of guide plate portions from each other along the inclination of the guide stay, and expanding the inner diameter of the guide through hole, and assembling the inner peripheral member by engaging the engagement piece of the inner peripheral member with an engagement recess formed in the inner peripheral surface of the outer peripheral member.
In the pressing step, when the outer peripheral member is pressed against the inner peripheral member by the guide plate, the oil seal is pressed in from the opening end of the outer peripheral member by the guide through hole of the guide plate.
According to the present invention, the guide plate is constituted by the plurality of guide plate portions divided around the axis line by the portion provided with the through hole for the support, and when the outer peripheral member and the guide plate are pressed against the inner peripheral member, the plurality of guide plate portions are separated from each other along the inclined guide support, and the inner diameter of the guide through hole is enlarged so that the outer peripheral member can be moved toward the inner peripheral member without the opening end portion of the outer peripheral member coming into contact with the facing surface of the guide plate, whereby the engagement piece of the inner peripheral member can be engaged with the engagement recess formed in the inner peripheral surface of the outer peripheral member to assemble the inner peripheral member, and further the outer peripheral member can be attached to the inner peripheral member without damaging the oil seal attached to the outer peripheral surface of the inner peripheral member.
Drawings
Fig. 1 is a sectional view showing the overall structure of an assembly device according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view taken along an axis showing the structure of a guide portion according to an embodiment of the present invention.
Fig. 3 is a sectional view and a plan view showing the structure of a guide plate according to an embodiment of the present invention.
Fig. 4 is a side view showing the structure of a guide stay according to the embodiment of the present invention.
Fig. 5 is a sectional view showing the structure of the pressing portion according to the embodiment of the present invention.
Fig. 6 is a cross-sectional view for explaining a shaft portion supporting step of supporting the shaft portion on the base portion when the operation portion is attached to the shaft portion in the embodiment of the present invention.
Fig. 7 is a cross-sectional view for explaining a step of placing the guide portion on the flange portion in the embodiment of the present invention.
Fig. 8 is a sectional view for explaining a pressing step of pressing the pressing portion to press the oil seal into the operating portion in the embodiment of the present invention.
Fig. 9 is an enlarged view showing the configuration of the operation portion, the oil seal, and the guide plate immediately before the oil seal is pressed into the operation portion in the embodiment of the present invention.
Fig. 10 is a cross-sectional view for explaining a through-hole enlarging step of further pressing the pressing portion to enlarge the inner diameter of the guide through-hole of the guide portion in the embodiment of the present invention.
Fig. 11 is a sectional view for explaining an assembly step of engaging and assembling the operation portion and the locking piece of the shaft portion in the embodiment of the present invention.
Fig. 12 is a cross-sectional view taken along the axis showing a structure before the operation portion is attached to the shaft portion and a state after the operation portion is attached to the shaft portion in the starting pump.
Fig. 13 is a cross-sectional view for explaining a state where the operation portion of the priming pump is attached to the shaft portion using a conventional jig.
Description of the reference numerals
1: starting the pump; 2: a shaft portion (inner peripheral side member); 3: an operation portion (outer peripheral member); 3 e: a top portion; 3 k: a locking recess; 3 n: an inner peripheral surface; 21: a valve core; 22: a pump spring; 23: a spring seat; 31: an operating spring; 40: oil sealing; 41: a reinforcement ring; 42: a sealing lip; 42 a: the anterior lip end; 50: a clamping sheet; 50 a: a locking body; 50 b: a locking claw; 100: assembling the device; 110: a base part; 111: a base body; 112: a support; 112 a: an open end portion; 113: a flange portion; 130: a guide portion; 135: a guide plate; 135a to 135 d: a guide plate portion; 136: a through hole for guiding; 136 h: an open end; 136 n: an inner peripheral surface; 137: a through hole for a support; 138: opposite surfaces; 139. 192: a cylindrical portion; 145: a pillar support plate; 145 c: a threaded hole; 145 h: a through hole; 150: a guide pillar; 151: a lower shaft portion; 152: a vertical leg portion; 153: an inclined strut part; 154: an upper shaft portion; 155: a spring; 170: a pressing part; 180: a pressing plate; 181: a through hole; 190: a support cylinder; 191: a support rod; 192: a cylindrical portion; C1-C4: cutting off the line; x: an axis.
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings.
Fig. 1 is a sectional view showing the overall structure of an assembly device according to an embodiment of the present invention. Fig. 2 is a cross-sectional view taken along an axis showing the structure of a guide portion according to an embodiment of the present invention. Fig. 3 is a sectional view and a plan view showing the structure of a guide plate according to an embodiment of the present invention. Fig. 4 is a side view showing the structure of a guide stay according to the embodiment of the present invention. Fig. 5 is a sectional view showing the structure of the pressing portion according to the embodiment of the present invention.
For convenience of explanation, the pressing direction is defined as the direction of arrow b in the direction of axis x in fig. 1 to 5. That is, the pressing direction is a direction in which the operation portion 3 of the starting pump 1 is pressed toward the shaft portion 2. Let the non-pressing direction be the direction of arrow a in the direction of axis x. That is, the non-pressing direction is a direction in which the operation portion 3 of the priming pump 1 is pulled up and the operation portion 3 is separated from the shaft portion 2. The outer peripheral side refers to a direction (arrow c direction) away from the axis x in a direction perpendicular to the axis x (hereinafter, also referred to as "radial direction"), and the inner peripheral side refers to a direction (arrow d direction) closer to the axis x in a direction perpendicular to the axis x. In this embodiment, the direction of arrow b, i.e., the pressing direction, is also referred to as the lower side, and the direction of arrow a, i.e., the non-pressing direction, is also referred to as the upper side.
< integral Structure of Assembly device >
Fig. 1 shows a state in which the assembling apparatus 100 supports the priming pump 1 before assembly. The structure of the starter pump 1 is already described with reference to fig. 12 and 13, and therefore, the description thereof is omitted here. The assembly apparatus 100 includes a base portion 110, a guide portion 130, and a pressing portion 170.
< Structure of base part >
The base unit 110 includes a base main body 111, a support body 112, and a flange portion 113 for attaching the base main body 111 to a console or the like, not shown.
The base main body 111 is a cylindrical member having a cylindrical shape centered on the axis x, and has an inner space capable of accommodating a portion below (in the direction of arrow b) the shaft portion 2 of the primer pump 1. The support body 112 is formed integrally with the base main body 111, and has an inner diameter equal to that of the base main body 111 and an outer diameter smaller than that of the base main body 111, with respect to the axis x.
The support 112 can accommodate the lower side (arrow b direction) of the shaft portion 2, and functions as a support portion in a state where the upper side (arrow a direction) opening end portion 112a is in contact with the lower end surface of the locking body 50a of the locking piece 50 of the shaft portion 2.
The flange portion 113 is a disk-shaped member integrally formed with a lower end portion of the lower side (in the arrow b direction) of the base main body 111, has an outer diameter larger than that of the base main body 111, and functions as a portion to be attached to a console or the like (not shown).
The base portion 110 having such a configuration can support the shaft portion 2 by the support 112 in a state where the oil seal 40 and the locking piece 50 of the shaft portion 2 are exposed and the shaft portion 2 cannot move downward in the axis x direction (arrow b direction).
< Structure of guide part >
As shown in fig. 2, the guide portion 130 is an assembly formed by combining the guide plate 135, the post support plate 145, and the guide post 150.
As shown in fig. 3 (a) and (B), the guide plate 135 is a disk-shaped or cylindrical member centered on the axis x. The guide plate 135 has a guide through hole 136, and the inner diameter of the guide through hole 136 is equal to or slightly larger than the inner diameter of the operation portion 3 having an inner peripheral surface slidable with respect to the lip tip 42a of the seal lip portion 42 of the oil seal 42 of the shaft portion 2.
The guide through hole 136 has an open end 136h, and the open end 136h has an inner diameter capable of sliding contact with the lip tip 42a of the seal lip portion 42 of the oil seal 40 of the shaft portion 2. The guide through hole 136 has an inner peripheral surface 136n having a tapered cross section, and the inner peripheral surface 136n is expanded in diameter toward the outer peripheral side (in the direction of arrow c) from an upper end surface 135u, which is an upper (in the direction of arrow a) end surface of the guide plate 135 where the open end 136h is formed, to a lower end surface 135t, which is a lower (in the direction of arrow b) end surface. That is, in a state where the guide plate 135 is opposed to the base portion 110, the cross section of the inner peripheral surface 136n of the guide through hole 136 is formed into a tapered shape having a diameter gradually increased toward the base portion 110.
The guide plate 135 has a plurality of (4 in this case) support through holes 137 for slidably supporting the outer peripheral surface of the guide support 150. The support through hole 137 is an inclined through hole formed to penetrate in an inclined state in which it is separated from the shaft portion 2 supported by the base portion 110 from the upper end surface 135u to the lower end surface 135t at an inclination angle equal to the inclination angle of the guide support 150.
The guide plate 135 has a cylindrical portion 139 centered on the axis x at a portion of the upper end surface 135u on the outer circumferential side (arrow c direction) of the guide through hole 136 and on the inner circumferential side (arrow d direction) of the support through hole 137, and the cylindrical portion 139 is provided to protrude upward (arrow a direction) by a predetermined length. The cylindrical portion 139 has an inner diameter having such a size as to be slidable on the outer peripheral surface of the operation portion 3 of the priming pump 1.
Further, a portion of the upper end surface 135u of the guide plate 135 on the inner peripheral side (in the direction of arrow b) of the cylindrical portion 139 is an opposed surface 138 opposed to the opening end portion 3c of the operation portion 3 of the starting pump 1.
Therefore, when the operation portion 3 is pressed downward (in the direction of arrow b), the operation portion 3 moves downward (in the direction of arrow b) along the inner peripheral surface of the cylindrical portion 139, and the opening end portion 3c of the operation portion 3 and the facing surface 138 of the guide plate 135 are arranged to face each other with a slight gap therebetween so as not to contact each other.
The guide plate 135 is composed of 4 guide plate portions 135a, 135b, 135C, and 135d, and the 4 guide plate portions are formed by dividing the 4 portions in which the through holes 137 for the support are formed by cutting lines C1 to C4 at 90 degree intervals with the axis x as the center. That is, in the guide plate 135, the 4 guide plate portions 135a to 135d can be separated by the cutting lines C1 to C4 and can be abutted and integrated by the cutting lines C1 to C4.
The column support plate 145 (fig. 2) of the guide 130 is a disk-shaped member centered on the axis x, and has a through hole 145h, and the through hole 145h has an inner diameter capable of sliding in contact with the base main body 111 of the base portion 110. The column support plate 145 has a threaded hole 145c formed with a female screw portion for attaching the plurality of guide columns 150 at a portion on the outer peripheral side (arrow a direction).
As shown in fig. 4, the guide post 150 of the guide portion 130 includes a lower shaft portion 151, a vertical post portion 152, an inclined post portion 153, and an upper shaft portion 154. The lower shaft portion 151 is a shaft portion integrated with the lower end (in the arrow c direction) of the vertical pillar portion 152, and has an external thread portion formed on the outer peripheral surface thereof. The male screw portion of the lower shaft portion 151 is threadedly engaged with a female screw portion formed in the screw hole 145c of the strut support plate 145.
The vertical strut portion 152 is a vertical strut portion having a diameter larger than that of the lower shaft portion 151 and extending along an axis x perpendicular to the radial direction (the direction of the arrow cd). When the lower shaft portion 151 is attached to the screw hole 145c of the pillar support plate 145, the vertical pillar portion 152 is supported by the upper end surface of the pillar support plate 145.
The inclined strut member 153 is a strut that is formed integrally with the upper side (arrow a direction) of the vertical strut member 152 and extends obliquely so as to approach from the outer peripheral side (arrow c direction) to the inner peripheral side (arrow d direction) as going from the lower side (arrow b direction) to the upper side (arrow a direction). That is, the inclined support column portion 153 is inclined so as to be separated from the shaft portion 2 from the tip portion on the upper side (in the direction of arrow a) to the base portion on the lower side (in the direction of arrow b). The inclined support portion 153 has the same diameter as the vertical support portion 152, and has an outer diameter capable of sliding contact with the support through hole 137 of the guide plate 135.
A spring 155 is disposed so as to surround the vertical support portion 152 and the inclined support portion 153. The upper end of the spring 155 is attached to the lower end surface 135t of the guide plate 135, and the lower end thereof is attached to the upper end surface of the column support plate 145.
The tip end portion of the inclined support column portion 153 is positioned so that the inclined support column portion 153 does not protrude from the upper end surface 135u of the guide plate 135 by the biasing force of the spring 155 toward the upper side (the arrow a direction) in a state where the tip end portion of the inclined support column portion 153 is slidably inserted into the column through hole 137 of the guide plate 135 and the guide plate 135 is not subjected to the pressing force toward the lower side (the arrow b direction).
Therefore, when the guide plate 135 is pressed downward (in the arrow b direction) from above (in the arrow a direction), the guide plate 135 is pressed downward (in the arrow c direction) along the inclined support portion 153 against the biasing force of the spring 155 directed upward (in the arrow d direction). At this time, the guide plate portions 135a to 135d of the guide plate 135 are separated from the cutting lines C1 to C4 along the inclination of the vertical column portion 152 of the guide column 150 so as to be away from each other.
The upper shaft portion 154 is a shaft portion that is integrated with an upper end portion (in the arrow a direction) of the inclined support portion 153 and extends along an axis x perpendicular to the radial direction (in the arrow cd direction). The upper shaft portion 154 protrudes upward (in the direction of arrow a) from the upper end surface 135u of the guide plate 135 and is fixed by a nut NT. Due to the presence of the nut NT, the guide plate 135 is prevented from coming out of the guide stay 150 by the upward (arrow a) urging force of the spring 155.
< Structure of pressing part >
As shown in fig. 5, the pressing portion 170 is a unit formed by combining a pressing plate 180 and a support tube 190. The pressing plate 180 is a disk-shaped member having substantially the same outer diameter as the guide plate 135, and an upper end surface 180u of the pressing plate 180 is a pressing surface to be pressed by an operator, and a lower end surface 180t is a contact surface to be contacted with the top portion 3e of the operation portion 3 of the starting pump 1.
The pressing plate 180 has a plurality of (4 in this case) through holes 181 formed with female screw portions at an end portion on the outer peripheral side (in the direction of arrow c) and at a position facing the upper shaft portion 154 of the guide stay 150 of the guide portion 130.
The support cylinder 190 includes a support rod 191 and a cylindrical portion 192 having a cylindrical shape with a bottom, and the support rod 191 and the cylindrical portion 192 are integrally formed. The support cylinder 190 is integrally formed with the pressing plate 180 by threadedly engaging a male screw portion formed on the outer peripheral surface of the support rod 191 with a female screw portion of the through hole 181 of the pressing plate 180.
The cylindrical portion 192 has a cylindrical inner space having a size capable of surrounding the upper shaft portion 154 of the guide stay 150 in the inner space thereof, and when the cylindrical portion 192 is placed on the guide plate 135 of the guide portion 130, the lower end surface 192c of the cylindrical portion 192 abuts against the upper end surface 135u of the guide plate 135. However, even when the lower end surface 192c of the cylindrical portion 192 abuts against the upper end surface 135u of the guide plate 135, the opening end portion 3c of the operation portion 3 does not abut against the facing surface 138 of the guide plate 135 due to the biasing force of the operation spring 31, and a slight gap is formed.
< Assembly Process >
Next, an assembling process when the operation portion 3 is assembled to the shaft portion 2 of the starting pump 1 using the assembling device 100 having such a structure will be described. Fig. 6 is a cross-sectional view for explaining a shaft portion supporting step of supporting the shaft portion 2 on the base portion 110 when the operation portion 3 is attached to the shaft portion 2 in the embodiment of the present invention. Fig. 7 is a sectional view for explaining a mounting step of the guide part 130 on the flange part 113 in the embodiment of the present invention. Fig. 8 is a sectional view for explaining a pressing step of pressing the pressing portion 170 to press the oil seal 40 into the operation portion 3 in the embodiment of the present invention. Fig. 9 is an enlarged view showing the configuration of the operation section 3, the oil seal 40, and the guide plate 135 immediately before the oil seal 40 is press-fitted into the operation section 3 in the embodiment of the present invention. Fig. 10 is a cross-sectional view for explaining a through-hole enlarging step of further pressing the pressing part 170 to enlarge the inner diameter of the guide through-hole 136 of the guide part 130 in the embodiment of the present invention. Fig. 11 is a sectional view for explaining an assembly step of engaging and assembling the operation portion 3 and the locking piece 50 of the shaft portion 2 in the embodiment of the present invention.
First, as shown in fig. 6, the shaft portion 2 to which the oil seal 40 and the locking piece 50 are attached in advance is accommodated in the base body 111 of the base portion 110 of the assembly device 100, and the lower end surface of the locking body 50a of the locking piece 50 is brought into contact with the opening end portion 112a of the support body 112, whereby the shaft portion 2 is supported in a state where the shaft portion 2 is placed on the base portion 110 (supporting step).
Next, as shown in fig. 7, the guide 130 is placed on the flange 113 from above the base 110 (in the direction of arrow a) (guide placing step). Specifically, the base main body 111 of the base portion 110 is inserted into and inserted through the through hole 145h of the strut support plate 145 of the guide portion 130, and the lower end surface of the lower shaft portion 151 of the guide strut 150 is brought into contact with the flange portion 113. At this time, the oil seal 40 of the shaft portion 2 is positioned in the guide through hole 136 of the guide plate 135.
Then, the operation portion 3 of the priming pump 1 is inserted along the inner circumferential surface of the cylindrical portion 139 of the guide plate 135. At this time, the inner peripheral surface 3n of the operation portion 3 is gradually inserted downward (in the direction of arrow b) while sliding along the outer peripheral surface of the spring seat 23 of the shaft portion 2.
Next, as shown in fig. 8, the lower end surface 192c of the support tube 190 of the pressing portion 170 is brought into contact with the upper end surface 135u of the guide plate 135, and the pressing portion 170 is placed on the guide plate 135 of the guide portion 130. That is, in the assembling apparatus 100, the shaft portion 2 and the operation portion 3 of the starting pump 1 can be assembled at this stage.
In this state, the pressing plate 180 of the pressing portion 170 is pushed downward (in the direction of arrow b), and the operation portion 3 abutting against the pressing plate 180 is pushed downward (in the direction of arrow b). At this time, as shown in fig. 9, the opening end portion 3c of the operation portion 3 does not abut on the facing surface 138 of the guide plate 135, but has a gap (operation portion supporting step). The reason is that, when there is no gap, the guide plate 135 is inclined by applying a force from the operation portion 3 to the facing surface 138 of the guide plate 135, and the inner peripheral surface of the stay through hole 137 and the inclined stay portion 153 scrape each other. If there is a gap, the cylindrical portion 192 of the support cylinder 190 contacts the guide plate, and the guide plate 135 is uniformly urged from the cylindrical portion 192, so that the guide plate 135 is smoothly pressed downward (in the direction of arrow b) without being inclined.
Then, as shown in fig. 10, the cylindrical portion 192 moves downward (in the direction of arrow b) together with the guide plate 135 against the urging force of the spring 155 of the guide stay 150. At this time, the presence of the inner peripheral surface 136n of the guide through hole 136 of the guide plate 135 prevents the seal lip portion 42 of the oil seal 40 from being expanded toward the outer peripheral side (arrow c direction) by the opening end portion 3c of the operating portion 3.
In particular, the guide through hole 136 has an inner peripheral surface 136n having a tapered cross section, which is gradually enlarged in diameter toward the base portion 110 in a state of being disposed to face the base portion 110. Therefore, the sliding contact range and the sliding contact time between the inner peripheral surface 136n of the guide through hole 136 of the guide plate 135 and the lip tip 42a of the seal lip 42 of the oil seal 40 can be suppressed to the minimum. As a result, the oil seal 40 can be press-fitted into the inside of the operation portion 3 while preventing the seal lip portion 42 from being pressed and expanded to the outer peripheral side (arrow c direction) before the oil seal 40 is press-fitted from the opening end portion 3c of the operation portion 3 and damaged.
When the operating portion 3 and the guide plate 135 are pushed downward (in the direction of arrow b) by the pressing plate 180 of the pressing portion 170, the guide plate 135 gradually expands toward the outer peripheral side (in the direction of arrow c) while being separated into the plurality of guide plate portions 135a to 135d along the inclined pillar portion 153 of the guide pillar 150 (guide plate expanding step).
As a result, as shown in fig. 11, the plurality of guide plate portions 135a to 135d are pushed together with the operating portion 3, and are separated from each other and expanded to the outer peripheral side (arrow c direction), so that the guide plate portions 135a to 135d are pushed downward (arrow b direction) together with the operating portion 3 without contacting the support body 112 of the base portion 110.
Thereby, the locking claws 50b of the locking pieces 50 are engaged with the locking recesses 3k of the operation portion 3, and the tapered surfaces 3cn (fig. 9) of the open end portions 3c are engaged with the locking bodies 50a of the locking pieces 50, whereby the assembly of the operation portion 3 to the shaft portion 2 is completed (assembly step).
< Effect >
When the operation portion 3 is assembled to the shaft portion 2 of the starting pump 1 by the assembling apparatus 100, the assembly of the shaft portion 2 and the operation portion 3 can be completed instantaneously and easily by only one press-fitting operation by pressing the pressing plate 180 of the pressing portion 170 downward (in the direction of arrow c) by an operator, and the oil seal 40 is not damaged.
< other embodiments >
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the assembly device 100 of the above embodiments, and includes all the aspects covered by the concept of the present invention and the claims. In order to achieve at least part of the above problems and effects, the respective configurations may be appropriately selected and combined. For example, the shape, material, arrangement, size, and the like of each component of the above embodiments may be appropriately changed according to a specific use of the present invention.
In the above embodiment, the case where the guide plate 135 is formed as the separable 4 guide plate portions 135a to 135d has been described, but the present invention is not limited to this, and any number of separable guide plate portions may be formed depending on the number of the guide stays 150.
Availability in production
The assembly device of the present invention is used in a priming pump. However, the structure in which the assembling device of the present invention can be used is not limited to this, and the assembling device of the present invention can be used for various other structures in which the inner periphery side member and the outer periphery side member need to be assembled.
Claims (5)
1. An assembly device, characterized in that,
the assembling device includes:
a base portion for supporting an inner peripheral side member having an annular oil seal and an annular locking piece attached to an outer peripheral surface, the base portion supporting the inner peripheral side member in a state where the oil seal and the locking piece are exposed;
a guide plate provided with a guide through hole having an inner diameter capable of sliding contact with a lip tip portion of the oil seal of the inner peripheral member, and a plurality of support column through holes located on an outer peripheral side of the guide through hole; and
a plurality of guide struts arranged around the base portion with the base portion as a center, having distal end portions inserted into the strut through holes of the guide plate and penetrating therethrough, the plurality of guide struts being inclined so as to be apart from the inner peripheral member from the distal end portions toward base portions,
the guide plate has an opposed surface supporting an opening end of a cylindrical outer peripheral member having an inner peripheral surface slidable relative to the outer peripheral surface of the inner peripheral member around the guide through hole,
the guide plate is composed of a plurality of guide plate portions, and the guide plate portions are divided around the axis line according to portions where the through holes for the pillars are provided.
2. The assembly device of claim 1,
the assembling device also comprises a pressing part,
the pressing portion can press the outer peripheral member against the inner peripheral member while sliding the inner peripheral surface of the outer peripheral member and the outer peripheral surface of the inner peripheral member,
the pressing portion has: a pressing plate that abuts the outer peripheral member from a non-pressing direction side; and a portion that is placed on the guide plate by being formed integrally with the pressing plate and being located on a pressing direction side with respect to the pressing plate.
3. The assembly device of claim 1,
the guide through hole of the guide plate is formed in a tapered cross section that gradually expands in diameter toward the base portion side in a state of being disposed facing the base portion.
4. A method of assembly, characterized in that,
the assembling method comprises the following steps:
an inner peripheral side member supporting step of supporting an inner peripheral side member having an annular oil seal and an annular locking piece attached to an outer peripheral surface on a base portion in a state where the oil seal and the locking piece are exposed;
an outer peripheral member supporting step of supporting an open end of an outer peripheral member with an opposing surface of a guide plate using the guide plate in a state where the outer peripheral member is slidably attached to the inner peripheral member, wherein the guide plate is provided with a guide through-hole having an inner diameter capable of sliding contact with a lip tip of the oil seal of the inner peripheral member and a plurality of strut through-holes located on an outer peripheral side of the guide through-hole, and the outer peripheral member has an inner peripheral surface capable of sliding relative to the outer peripheral surface of the inner peripheral member in a state where the outer peripheral member is disposed to face the inner peripheral member;
a pressing step of pressing the outer peripheral member and the guide plate toward the inner peripheral member by using a plurality of guide plate portions formed by dividing the guide plate around the axis line by a portion provided with the support through hole and a plurality of guide stays arranged around the base portion, having distal end portions inserted into the support through holes of the guide plate, and inclined so as to be apart from the inner peripheral member from the distal end portions toward a base portion; and
and an assembling step of, when the guide plate is pressed against the inner peripheral member, separating the plurality of guide plate portions from each other along the inclined guide support, expanding an inner diameter of the guide through hole, moving the outer peripheral member without bringing an opening end portion of the outer peripheral member into contact with the facing surface of the guide plate, and engaging the engagement piece of the inner peripheral member with an engagement recess formed in the inner peripheral surface of the outer peripheral member to assemble the inner peripheral member.
5. The method of assembling of claim 4,
in the pressing step, when the outer peripheral member is pressed against the inner peripheral member by the guide plate, the oil seal is press-fitted from the opening end of the outer peripheral member through the guide through hole of the guide plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710135282.XA CN108571408B (en) | 2017-03-08 | 2017-03-08 | Assembling device and assembling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710135282.XA CN108571408B (en) | 2017-03-08 | 2017-03-08 | Assembling device and assembling method |
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| Publication Number | Publication Date |
|---|---|
| CN108571408A CN108571408A (en) | 2018-09-25 |
| CN108571408B true CN108571408B (en) | 2020-09-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710135282.XA Active CN108571408B (en) | 2017-03-08 | 2017-03-08 | Assembling device and assembling method |
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| CN (1) | CN108571408B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113690797B (en) * | 2020-08-12 | 2022-09-16 | 国网吉林省电力有限公司通化供电公司 | Cable pulley assembly |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59110898A (en) * | 1982-12-15 | 1984-06-26 | Ebara Corp | Shaft seal protector |
| US7526847B1 (en) * | 2005-03-25 | 2009-05-05 | Honda Motor Co., Ltd. | Crankshaft oil seal installation device |
| KR200420819Y1 (en) * | 2006-04-18 | 2006-07-06 | 김한식 | Mechanical compact seal |
| CN102658472B (en) * | 2012-04-27 | 2015-09-02 | 河南省西峡汽车水泵股份有限公司 | A kind of oil seal pressing apparatus and method preventing oil sealing lip turnover |
| DE202013003962U1 (en) * | 2013-04-29 | 2013-08-01 | Henan Province Xixia Automobile Water Pump Co., Ltd. | Device for applying oil seals |
| CN204381778U (en) * | 2015-01-09 | 2015-06-10 | 中国长安汽车集团股份有限公司四川建安车桥分公司 | Oil seal press-in machine structure |
| CN205184214U (en) * | 2015-12-11 | 2016-04-27 | 吉林文德孚科技有限公司 | Oil blanket cover spring assembly |
| CN106378606B (en) * | 2016-09-14 | 2018-06-05 | 安徽江淮汽车集团股份有限公司 | For being pressed the pressing device of crankshaft front oil seal-mounting and Rear oil seal |
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2017
- 2017-03-08 CN CN201710135282.XA patent/CN108571408B/en active Active
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| CN108571408A (en) | 2018-09-25 |
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