CN117961481B - Press fitting tool and shaft seal press fitting method - Google Patents
Press fitting tool and shaft seal press fitting method Download PDFInfo
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- CN117961481B CN117961481B CN202410370512.0A CN202410370512A CN117961481B CN 117961481 B CN117961481 B CN 117961481B CN 202410370512 A CN202410370512 A CN 202410370512A CN 117961481 B CN117961481 B CN 117961481B
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- shaft
- press
- hollow shaft
- spring seat
- fitting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/02—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for connecting objects by press fit or for detaching same
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automatic Assembly (AREA)
Abstract
The invention provides a press-fitting tool and a shaft seal press-fitting method. A press-fitting tool for press-fitting a shaft seal to a predetermined position between a shaft and a sleeve, the press-fitting tool comprising: a hollow shaft including a central bore and opposed first and second ends, the first end of the hollow shaft including a ram; a top pressing rod positioned in the central hole of the hollow shaft; and an elastic member disposed between the hollow shaft and the pressing rod; wherein, in the pressure equipment process of pressure equipment instrument, the roof depression bar with the axle contact, roof depression bar application effort to the axle, the axial roof depression bar application reaction force makes the elastic component warp simultaneously. The apparatus and method according to the present invention can detect if the snap ring is installed in place at the same time as the shaft seal is installed.
Description
Technical Field
The present invention relates to a tool for assembling a flange shaft, and more particularly, to a press-fitting tool and a shaft seal press-fitting method for press-fitting a shaft seal to a predetermined position between a shaft and a sleeve.
Background
The flange shaft of a vehicle is typically mounted between the steering wheel and the vehicle steering. As shown in fig. 1 and 2, the flange shaft (hereinafter, simply referred to as shaft 1) includes a first end 11 for connection to a steering wheel and a second end 12 for connection to a steering gear, and the sleeve 2 fitted over the outer ring of the shaft 1 similarly includes a first end 21. There is a gap G between the first end 11 of the shaft and the first end 21 of the sleeve. The first end 11 of the shaft and the first end 21 of the sleeve each have a shoulder 110,210, through which gap G the bearing 3 is mounted to the shoulders 110,210 of the shaft and sleeve. Then, a first snap ring 41 is mounted on the first end 21 of the sleeve and bears against the bearing 3, and a second snap ring 42 is mounted on the first end 11 of the shaft and bears against the bearing 3. After the first and second snap rings 41, 42 are installed in place, the shaft seal 5, or seal ring, is installed through the gap G.
Disclosure of Invention
The invention aims to solve or at least alleviate the technical problem in the prior art that the second clamping ring on the shaft is difficult to be installed in place.
In one aspect, there is provided a press-fitting tool for press-fitting a shaft seal to a predetermined position between a shaft and a sleeve, the press-fitting tool comprising:
a hollow shaft including a central bore and opposed first and second ends, the first end of the hollow shaft including a ram;
a top pressing rod positioned in the central hole of the hollow shaft;
and an elastic member disposed between the hollow shaft and the pressing rod;
Wherein, in the pressure equipment process of pressure equipment instrument, the roof depression bar with the axle contact, roof depression bar application effort to the axle, the axial roof depression bar application reaction force makes the elastic component warp simultaneously.
Also provided is a shaft seal press-fitting method, the method comprising:
Press-fitting a shaft seal between a shaft and a sleeve using the press-fitting tool according to the embodiment;
and observing whether the shaft is displaced during the mounting process, and judging that the second clamping ring on the shaft is not mounted in place when the shaft is displaced.
The device and the method can detect whether the second clamping ring is installed in place while installing the shaft seal, ensure the second clamping ring to be installed in place without adding redundant working procedures, do not need further steps to detect the installation of the clamping ring, and avoid the incorrectly assembled product from flowing to customers.
Drawings
The present disclosure will become more readily understood with reference to the accompanying drawings. As will be readily appreciated by those skilled in the art: the drawings are for illustrative purposes only and are not intended to limit the scope of the present invention. Moreover, like numerals in the figures are used to designate like parts, wherein:
FIG. 1 shows a cross-sectional view of a combined shaft and sleeve;
FIG. 2 shows an enlarged cross-sectional view of the shaft and sleeve of FIG. 1 at one end;
FIG. 3 shows a cross-sectional view of a press-fit tool according to an embodiment of the invention;
FIG. 4 shows a schematic view of the press-fit tool of FIG. 3 with a shaft seal installed;
fig. 5 shows a cross-sectional view of the press-fit tool of fig. 3 with a shaft seal installed.
Reference numerals:
A shaft 1;
A first end 11 of the shaft;
A second end 12 of the shaft;
a shoulder 110 of the shaft;
A sleeve 2;
a first end 21 of the sleeve;
shoulder 210 of the sleeve;
a bearing 3;
A first snap ring 41;
a second snap ring 42;
A shaft seal 5;
A hollow shaft 6;
A central bore 60;
A first end 61 of the hollow shaft;
A second end 62 of the hollow shaft;
A reference surface 610;
an annular lip 611;
a second through hole 621;
A pressing rod 7;
an inner end 71 of the ejector pin;
the outer end 72 of the ejector pin;
A shoulder 73 of the ejector lever;
A limit collar 721;
An elastic member 8;
A spring seat 9;
A first through hole 90;
a flange 93;
A base 100;
A gap G;
displacement d of the ejector pin.
Detailed Description
A press-fitting tool according to an embodiment of the present invention will be described with reference to fig. 3 to 5. The press-fitting tool presses the shaft seal 5 to a predetermined position between the shaft 1 and the sleeve 2 through the gap G, for example, in the structure shown in fig. 1 and 2. The press-fitting tool includes: hollow shaft 6, hollow shaft 6 includes a central bore 60 and opposed first and second ends 61 and 62, the first end 61 of the hollow shaft 6 including a ram for press fitting the shaft seal into place. The ejector pin 7 is located in the central bore 60 of the hollow shaft 6, and the elastic member 8 is arranged between the hollow shaft 6 and the ejector pin 7. As shown in fig. 5, in the press-fitting process of the press-fitting tool, the ram of the hollow shaft presses the shaft seal 5 until the shaft seal 5 moves to a predetermined position between the shaft 1 and the sleeve 2, in which the pressing lever 7 contacts the shaft 1 such that the pressing lever 7 applies a force to the shaft 1 and the shaft 1 applies a reaction force to the pressing lever 7 to deform the elastic member 8. As the elastic member 8 deforms, the urging force of the urging lever 7 to the shaft 1 gradually increases, whereby it is possible to detect whether the second snap ring 42 on the shaft 1 is mounted in place. If the second snap ring 42 is not mounted in place, the shaft 1 may hang in the sleeve by friction, and the shaft 1 will be displaced under the force of the pressing rod 7 that increases stepwise with the deformation of the elastic member 8, and if the second snap ring 42 is mounted in place, the shaft 1 will not be displaced. Therefore, by the above-mentioned press-fitting tool, it is possible to detect whether the second snap ring 42 is mounted in place while the shaft seal 5 is mounted, and to ensure that the second snap ring 42 is mounted in place without adding an unnecessary process, and further steps are not required to detect the mounting of the second snap ring, and also to prevent the product which is not properly assembled from flowing to the customer.
In some embodiments, the elastic member 8 may be directly connected between the hollow shaft 6 and the pressing rod 7, in which case the hollow shaft 6 needs to have a seat for supporting the elastic member 8. In an alternative embodiment, the existing press-fit tool may be retrofitted with a spring seat 9, the spring seat 9 being mounted to the hollow shaft 6, for example to the second end 62 of the hollow shaft 6, and the resilient member 8 being a coil spring mounted between the spring seat 9 and the ejector rod 7. Alternatively, other forms of resilient members may be employed, such as other forms of springs or the like.
In some embodiments, the spring seat 9 is cylindrical, comprising a side wall, the proximal end of which, i.e. the end proximal to the shaft 1 to be assembled, is open, the distal end of which opposite the proximal end has a distal wall 921. In some embodiments, the top strut 7 has an outer end 72 and an inner end 71, the outer end 72 having a smaller diameter than the inner end 71, and a transition shoulder 73 between the outer end 72 and the inner end 71. The coil spring surrounds the top plunger 7 and is located between the shoulder 73 of the top plunger and the distal wall 921 of the spring seat 9. In alternative embodiments, the coil spring may be mounted between the spring seat 9 and the ejector rod 7 by other means.
In some embodiments, the side wall of the spring seat 9 has a first through hole 90 and the second end 62 of the hollow shaft 6 has a second through hole 621, the first through hole 90 and the second through hole 621 corresponding in position, the spring seat 9 being secured to the second end 62 of the hollow shaft 6 by a pin or bolt passing through the first through hole 90 of the side wall of the spring seat 9 and the second through hole 621 of the second end 62 of the hollow shaft 6. In some embodiments, the first through hole 90 of the side wall of the spring seat 9 and the second through hole 621 of the second end 62 of the hollow shaft 6 may each extend radially. In some embodiments, the spring seat 9 includes a flange 93 outboard of the sidewall, the proximal end of the spring seat 9 extending into the central bore 60 of the hollow shaft 6 when the spring seat 9 is mounted to the second end 62 of the hollow shaft 6, the flange 93 abutting an end wall of the second end 62 of the hollow shaft 6. In some embodiments, the spring seat 9 may also be connected to the second end 62 of the hollow shaft 6 by bolts passing through the flange 93.
In some embodiments, the pressing rod 7 may be supported by the spring seat 9 by a flange or a snap ring or the like before the press-fitting process, at which time the elastic member 8 may not be compressed or stretched, or the elastic member 8 may be pre-compressed or pre-stretched. In some embodiments, the distal wall of the spring seat 9 has an aperture through which the outer end 72 of the plunger 7 passes, and the outer end 72 of the plunger 7 has a snap ring 721. Before the press-fitting process, the pressing rod 7 is suspended on the spring seat 9 by a snap ring 721 at the outer end 72. Furthermore, before press fitting, inner end 71 is within central bore 60 of the hollow shaft, i.e., inner end 71 does not protrude from central bore 60. In alternative embodiments, the push rod 7 may be supported by the spring seat 9 in other ways prior to press fitting, for example the push rod 7 may be provided with a snap ring or flange at other locations to be supported with a protrusion of the spring seat 9.
In some embodiments, the ram of the hollow shaft may be a separate ram and mounted to the second end 62 of the hollow shaft 6, alternatively, as shown in fig. 3, the second end 62 of the hollow shaft 6 may be formed directly as a ram. In some embodiments, the ram includes, for example, a datum surface 610 and an annular lip 611 protruding from the datum surface 610, the datum surface 610 defining a depth to which the ram extends into the gap G, thereby defining a mounting depth of the shaft seal 5. In some embodiments, the jacking rod 7 is sized such that the jacking rod 7 has contacted the shaft 1 before the annular lip 611 enters the gap G between the shaft 1 and the sleeve 2.
In another aspect, according to an embodiment of the present invention, there is also provided a shaft seal press-fitting method including: press-fitting the shaft seal 5 between the shaft 1 and the sleeve 2 with the press-fitting tool according to the respective embodiments; and observing whether the shaft 1 is displaced during the mounting process, and determining that the second snap ring 42 on the shaft 1 is not mounted in place when the shaft 1 is displaced. As shown in fig. 4, the shaft 1 and the sleeve 2 are preassembled, the sleeve 2 is fixed to the base 100, the shaft seal 5 may be mounted to the gap G between the shaft 1 and the sleeve 2 manually or by a robot arm, the press-fitting tool according to various embodiments may be connected to a power source such as a robot arm or a hydraulic device or the like to perform a press-fitting operation, alternatively the press-fitting step may also be performed manually. As shown in fig. 5, in which the second snap ring 42 is properly installed, the force of the shaft of the pressing rod 7 is completely offset by the second snap ring 42, and the reaction force of the shaft to the pressing rod 7 compresses the coil spring, and the displacement of the pressing rod is approximately d. The apparatus and method according to the present invention can detect if the snap ring is installed in place at the same time as the shaft seal is installed.
The above-described specific embodiments of the present invention are provided only for the purpose of more clearly describing the principles of the present invention, in which individual components are clearly shown or described so as to make the principles of the present invention more easily understood. Various modifications or alterations of this invention may be readily made by those skilled in the art without departing from the scope of this invention. It is to be understood that such modifications and variations are intended to be included within the scope of the present invention.
Claims (8)
1. A shaft seal press-fitting method, the method comprising:
Preassembling a shaft (1) and a sleeve (2), comprising: mounting a bearing (3) to a shoulder (110) of a shaft and a shoulder (210) of a sleeve through a gap G between a first end (11) of the shaft and a first end (21) of the sleeve, mounting a first snap ring (41) on the first end (21) of the sleeve and against the bearing (3), and mounting a second snap ring (42) on the first end (11) of the shaft and against the bearing (3);
the shaft seal (5) is pressed between the shaft (1) and the shaft sleeve (2) by using a pressing tool;
And observing whether the shaft (1) is displaced or not during press fitting, and determining that a second snap ring (42) on the shaft (1) is not mounted in place when the shaft (1) is displaced;
Wherein, the pressure equipment instrument includes:
-a hollow shaft (6), the hollow shaft (6) comprising a central bore (60) and opposite first (61) and second (62) ends, the first end (61) of the hollow shaft comprising a ram;
A top pressure bar (7) located in the central hole (60) of the hollow shaft;
a spring seat (9) mounted to the hollow shaft (6), a distal end wall of the spring seat having an aperture, the top pressure lever (7) having an outer end (72) passing through the aperture of the distal end wall and an inner end (71) opposite the outer end, the outer end (72) of the top pressure lever (7) having a snap ring (721);
and an elastic member (8) provided between the hollow shaft (6) and the pressing rod (7);
before the press-fitting process, the pressing rod (7) is supported by the spring seat (9) through a limit snap ring (721) at the outer end (72), the inner end (71) is positioned in a central hole (60) of the hollow shaft, during the press-fitting process of the press-fitting tool, the central hole of the hollow shaft surrounds a part of the shaft (1) protruding out of the shaft sleeve (2), then the pressing rod (7) is in contact with the shaft (1), the pressing rod (7) applies a force to the shaft (1), and the shaft (1) applies a reaction force to the pressing rod (7) to deform the elastic member (8).
2. Shaft seal press-fitting method according to claim 1, characterized in that the elastic member is a coil spring between the spring seat (9) and the pressing rod (7).
3. The shaft seal press-fitting method according to claim 2, characterized in that the spring seat (9) is cylindrical, comprising a side wall and a distal wall (921) at one end of the side wall.
4. A shaft seal press fitting method according to claim 3, characterized in that the side wall of the spring seat (9) has a first through hole (90), the second end (62) of the hollow shaft (6) has a second through hole (621), the first through hole (90) corresponds in position to the second through hole (621), the spring seat (9) is fixed to the second end (62) of the hollow shaft (6) by means of a pin or bolt passing through the first through hole (90) of the side wall of the spring seat (9) and the second through hole (621) of the second end (62) of the hollow shaft (6).
5. A shaft seal press fit method according to claim 3, characterized in that the spring seat (9) comprises a flange (93) outside the side wall, the proximal end of the spring seat (9) protruding into the central bore (60) of the hollow shaft (6) when the spring seat (9) is mounted to the second end (62) of the hollow shaft (6), the flange (93) abutting against the end wall of the second end (62) of the hollow shaft (6).
6. A shaft seal press fitting method according to claim 3, characterized in that the top press bar (7) comprises a shoulder (73), the spiral spring surrounding the top press bar (7) and being located between the shoulder (73) of the top press bar and the distal wall (921) of the spring seat (9).
7. Shaft seal press-fitting method according to claim 2, characterized in that the pressing rod (7) is supported by the spring seat (9) by means of a snap ring or a flange before the press-fitting process.
8. Shaft seal press-fitting method according to claim 1, characterized in that the ram of the hollow shaft comprises a reference surface (610) and an annular lip (611) protruding from the reference surface, the pressing rod (7) contacting the shaft (1) before the annular lip (611) enters the gap G of the shaft (1) and the sleeve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410370512.0A CN117961481B (en) | 2024-03-29 | 2024-03-29 | Press fitting tool and shaft seal press fitting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410370512.0A CN117961481B (en) | 2024-03-29 | 2024-03-29 | Press fitting tool and shaft seal press fitting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117961481A CN117961481A (en) | 2024-05-03 |
| CN117961481B true CN117961481B (en) | 2024-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410370512.0A Active CN117961481B (en) | 2024-03-29 | 2024-03-29 | Press fitting tool and shaft seal press fitting method |
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| Country | Link |
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| CN (1) | CN117961481B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205889031U (en) * | 2016-07-26 | 2017-01-18 | 安徽江淮汽车股份有限公司 | Utensil is assisted in pressure equipment of bent axle oil blanket |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58124816A (en) * | 1982-01-20 | 1983-07-25 | Toyota Motor Corp | How to assemble a shaft with hydraulic pressure measurement added |
| JP2004264275A (en) * | 2003-01-08 | 2004-09-24 | Fuji Electric Holdings Co Ltd | Shaft alignment system and method therefor |
| CN105134804B (en) * | 2015-09-07 | 2017-10-13 | 安徽江淮汽车集团股份有限公司 | A kind of press-loading apparatus of taper roll bearing |
| CN214868518U (en) * | 2021-03-31 | 2021-11-26 | 重庆庆兰实业有限公司 | Big and small bearing press mounting equipment |
| CN115450763B (en) * | 2021-06-08 | 2025-03-28 | 中国航发商用航空发动机有限责任公司 | High-pressure turbine air duct assembly method and device |
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2024
- 2024-03-29 CN CN202410370512.0A patent/CN117961481B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205889031U (en) * | 2016-07-26 | 2017-01-18 | 安徽江淮汽车股份有限公司 | Utensil is assisted in pressure equipment of bent axle oil blanket |
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| Publication number | Publication date |
|---|---|
| CN117961481A (en) | 2024-05-03 |
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