WO2009004640A1 - Spindle and magnet system for speedometers - Google Patents
Spindle and magnet system for speedometers Download PDFInfo
- Publication number
- WO2009004640A1 WO2009004640A1 PCT/IN2007/000362 IN2007000362W WO2009004640A1 WO 2009004640 A1 WO2009004640 A1 WO 2009004640A1 IN 2007000362 W IN2007000362 W IN 2007000362W WO 2009004640 A1 WO2009004640 A1 WO 2009004640A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spindle
- assembly
- magnet
- sintered
- bush
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/04—Special adaptations of driving means
Definitions
- the present invention relates to an improved spindle (4) and magnet (2) assembly of Speedo movement for automobiles comprising cable stopper (10) provided in bearing block (7) to prevent cable get loaded onto spindle (4) during rotation; and bush sintered (8) having reduced bore length to ease friction with the spindle (4).
- Figure 1 shows Spindle (4) and Magnet (2) assembly in Speedo movement of existing component.
- Figure 2 shows assembly sequence of Spindle (4) and Magnet (2) assembly of figure 1.
- Figure 3 shows improved (proposed) Spindle (4) and Magnet (2) assembly in Speedo movement.
- Figure 4 shows novel assembly sequence of Spindle (4) and Magnet (2) assembly of figure 3.
- the Spindle (4) assembly is shown in figure 1 contains the following components which rotates / transmits motion.
- the stationary components are Bearing block (7) & Bush sintered (8).
- Bush sintered (8) acts as bearing for Spindle (4) assembly that reduces friction with rotating components.
- the primary object of the present invention is to overcome the aforementioned limitations by providing novel assembly method and device.
- Yet another object of the present invention is to provide an improved spindle (4) and magnet (2) assembly of Speedo movement for automobiles which in-turn increases the life and reliability of Speedo movement.
- Still another object of the present invention is to provide Cable stopper (10) in bearing block (7) to prevent the cable get loading on spindle (4) during rotation and also to prevent dust or grease (Foreign particle) entry.
- Still another object of the present invention is to provide increased clearance area between spindle (4) and the bearing block (7) by eliminating holder (5) from the assembly to prevent creation of vacuum at the clearance area.
- the present invention provides for an improved spindle (4) and magnet (2) assembly of Speedo movement for automobiles, said assembly comprises cable stopper (10) provided in bearing block (7) to prevent cable get loaded onto spindle (4) during rotation; and bush sintered (8) having reduced bore length to ease friction with the spindle (4) and also, a method of assembling spindle (4) and magnet (2) assembly of Speedo movement for automobiles, said method comprising steps of inserting lower washer (6) into spindle (4) and thereafter said spindle (4) into bearing block (7); press fitting bush sintered (8) with the bearing block (7) by guiding the bush sintered (8) bore with the spindle (4); crimping the bearing block (7) to arrest upward movement of bush sintered (8); and inserting worm (9), magnet (2) and compensator (1) into the spindle (4) and thereafter flaring the spindle (4) at the magnet (2) end to arrest upward movement of the magnet
- the primary embodiment of the present invention is an improved spindle (4) and • magnet (2) assembly of Speedo movement for automobiles, said assembly comprises cable stopper (10) provided in bearing block (7) to prevent cable get loaded onto spindle (4) during rotation; and bush sintered (8) having reduced bore length to ease friction with the spindle (4).
- the reduction in bore length is ranging from 30% to 60%.
- the assembly comprises compensator (1), magnet (2) and worm (9) resided inside the spindle (4); and lower washer (6) placed between the bush sintered (8) and the spindle (4) and upper washer
- the bush sintered (8) acts as bearing for the spindle (4) assembly to reduce friction between stationary and rotating components.
- the assembly provides increased clearance area between spindle (4) and the bearing block (7) which prevents creation of vacuum at the clearance area and thereby prevents sucking of foreign particles comprising grease and dust particles into the bearing area.
- the method provides increased clearance area between spindle (4) and the bearing block (7) by eliminating holder (5) from the assembly.
- the Spindle (4) assembly contains as shown in figure 3 the following components which rotates / transmits motion.
- the stationary components are Bearing block (7) & Bush sintered (8).
- Bush sintered (8) acts as bearing for Spindle (4) assembly, which reduces friction between stationary and rotating components.
- Cable stopper (10) provided in Bearing block (7) to prevent the cable get loading on spindle (4) during rotation. This also prevents dust or grease (Foreign particle) entry to some extend.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The present invention relates to an improved spindle (4) and magnet (2) assembly of Speedo movement for automobiles comprising cable stopper (10) provided in bearing block (7) to prevent cable get loaded onto spindle (4) during rotation; and bush sintered (8) having reduced bore length to ease friction with the spindle (4).
Description
SPINDLE AND MAGNET SYSTEM FOR SPEEDOMETERS
FIELD OF THE INVENTION The present invention relates to an improved spindle (4) and magnet (2) assembly of Speedo movement for automobiles comprising cable stopper (10) provided in bearing block (7) to prevent cable get loaded onto spindle (4) during rotation; and bush sintered (8) having reduced bore length to ease friction with the spindle (4).
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
Figure 1 shows Spindle (4) and Magnet (2) assembly in Speedo movement of existing component.
Figure 2 shows assembly sequence of Spindle (4) and Magnet (2) assembly of figure 1. Figure 3 shows improved (proposed) Spindle (4) and Magnet (2) assembly in Speedo movement.
Figure 4 shows novel assembly sequence of Spindle (4) and Magnet (2) assembly of figure 3.
BACKGROUND OF THE INVENTION AND PRIOR ART The rotary motion from the hub drive / front wheel is transmitted to Speedo movement trough flexible cable. One end of the cable is connected to hub drive in front wheel & the other end of cable connected to Speedo movement through Bearing block (7).
The rotary motion from cable is transmitted to magnet (2) through spindle (4) in Speedo movement.
The 3 degrees of freedom (Translation along X, Y & Z axis) & 2 degrees of freedom (Rotation along X & Z axis) are arrested in spindle (4) assembly by below indicated components which is known in prior art.
The Spindle (4) assembly is shown in figure 1 contains the following components which rotates / transmits motion.
1. Spindle (4) 2. Holder (5)
3. Upper washer (3)
4. Lower washer (6)
5. Worm (9)
6. Magnet (2) 7. Compensator (1)
The stationary components are Bearing block (7) & Bush sintered (8).
Bush sintered (8) acts as bearing for Spindle (4) assembly that reduces friction with rotating components.
The assembly sequence as shown in figure 2 is as follows below.
1. Press fitting of Bush sintered (8) with Bearing block (7) 2. Crimping Bearing block (7) to arrest upward movement of Bush sintered (8).
3. Insertion of spindle (4) and upper washer (3) into Bush sintered (8) in which the Step in Spindle (4) arrests the down ward movement of Spindle (4) against the Bush sintered (8).
4. Insertion of Lower washer (6) & Holder (5) into Spindle (4) 5. Flaring of Spindle (4) at Holder (5) end to arrest the Spindle (4) movement in upward direction.
6. Insertion of Worm (9), Magnet (2) & Compensator (1) into spindle (4).
7. Flaring of Spindle (4) at magnet (2) end to arrest the magnet (2) and worm (9) movement in upward direction.
Limitations in Existing Method:
1. Less clearance between Holder (5) (Rotating component) and Bearing block (7) (Stationary component). Hence during Holder (5) & Spindle (4) rotation, vacuum gets created at clearance area that sucks in the grease and dust (Foreign particle) into bearing area resulting in spindle (4) jam.
2. No provision for cable stopper (10) in Bearing block (7) to prevent the cable get loading on spindle (4) during rotation.
3. Increased Bore length in Bush sintered (8). Hence manufacturing difficulty in maintaining the bore size.
4. The increased bearing length increases friction with spindle (4).
5. No space in Speedo movement for grease / dust (Foreign particle) accumulation in Speedo movement.
The above disadvantages in -turn reduces the life and reliability of Speedo movement. Hence the novel method and device is explained in the present invention which helps in over coming the potential limitations of the existing system and method of assembly.
OBJECTS OF THE INVENTION The primary object of the present invention is to overcome the aforementioned limitations by providing novel assembly method and device.
Yet another object of the present invention is to provide an improved spindle (4) and magnet (2) assembly of Speedo movement for automobiles which in-turn increases the life and reliability of Speedo movement.
Still another object of the present invention is to provide Cable stopper (10) in bearing block (7) to prevent the cable get loading on spindle (4) during rotation and also to prevent dust or grease (Foreign particle) entry.
Still another object of the present invention is to provide increased clearance area between spindle (4) and the bearing block (7) by eliminating holder (5) from the assembly to prevent creation of vacuum at the clearance area.
STATEMENT OF INVENTION
Accordingly, the present invention provides for an improved spindle (4) and magnet (2) assembly of Speedo movement for automobiles, said assembly comprises cable stopper (10) provided in bearing block (7) to prevent cable get loaded onto spindle (4) during rotation; and bush sintered (8) having reduced bore length to ease friction with the spindle (4) and also, a method of assembling spindle (4) and magnet (2) assembly of Speedo movement for automobiles, said method comprising steps of inserting lower washer (6) into spindle (4) and thereafter said spindle (4) into bearing block (7); press fitting bush sintered (8) with the bearing block (7) by guiding the bush sintered (8) bore with the spindle (4); crimping the bearing block (7) to arrest upward movement of bush sintered (8); and
inserting worm (9), magnet (2) and compensator (1) into the spindle (4) and thereafter flaring the spindle (4) at the magnet (2) end to arrest upward movement of the magnet
(2) and worm (9) and downward movement of the spindle (4) to obtain the assembly.
DETAILED DESCRIPTION OF THE INVENTION
The primary embodiment of the present invention is an improved spindle (4) and • magnet (2) assembly of Speedo movement for automobiles, said assembly comprises cable stopper (10) provided in bearing block (7) to prevent cable get loaded onto spindle (4) during rotation; and bush sintered (8) having reduced bore length to ease friction with the spindle (4).
In yet another embodiment of the present invention, the reduction in bore length is ranging from 30% to 60%.
In still another embodiment of the present invention, the assembly comprises compensator (1), magnet (2) and worm (9) resided inside the spindle (4); and lower washer (6) placed between the bush sintered (8) and the spindle (4) and upper washer
(3) located above the bush sintered (8).
In still another embodiment of the present invention, the bush sintered (8) acts as bearing for the spindle (4) assembly to reduce friction between stationary and rotating components.
In still another embodiment of the present invention, the assembly provides increased clearance area between spindle (4) and the bearing block (7) which prevents creation of vacuum at the clearance area and thereby prevents sucking of foreign particles comprising grease and dust particles into the bearing area.
In still another embodiment of the present invention is a method of assembling spindle (4) and magnet (2) assembly of Speedo movement for automobiles, said method comprising steps of inserting lower washer (6) into spindle (4) and thereafter said spindle (4) into bearing block (7); press fitting bush sintered (8) with the bearing block
(7) by guiding the bush sintered (8) bore with the spindle (4); crimping the bearing block (7) to arrest upward movement of bush sintered (8); and inserting worm (9), magnet (T) and compensator (1) into the spindle (4) and thereafter flaring the spindle
(4) at the magnet (2) end to arrest upward movement of the magnet (2) and worm (9) and downward movement of the spindle (4) to obtain the assembly.
In still another embodiment of the present invention, the method provides increased clearance area between spindle (4) and the bearing block (7) by eliminating holder (5) from the assembly.
The Spindle (4) assembly contains as shown in figure 3 the following components which rotates / transmits motion.
1. Spindle (4)
2. Upper washer (3)
3. Lower washer (6) 4: Worm (9) 5. Magnet (2)
6. Compensator (1)
The stationary components are Bearing block (7) & Bush sintered (8).
Bush sintered (8) acts as bearing for Spindle (4) assembly, which reduces friction between stationary and rotating components.
The assembly sequence as shown in figure 4 is as follows below.
1. Insertion of Lower washer (6) into Spindle (4).
2. Insertion of Spindle (4) and Lower washer (6) into Bearing block (7)
3. Bush sintered (8) press fitted with Bearing block (7) by guiding Bush sintered (8) bore with Spindle (4).
4. Crimping Bearing block (7) to arrest upward movement of Bush sintered (8). Hence the Step in Spindle (4) arrests the upward movement of Spindle (4) against the Bush sintered (8).
5. Insertion of Worm (9), Magnet (2) & Compensator (1) into Spindle (4).
Flaring of Spindle (4) at magnet (2) end to arrest the magnet (2) / worm (9) upward movement and Spindle (4) down ward movement.
Advantages in proposed / new method: 1. Holder (5) eliminated. This results in increased clearance between Spindle (4) (Rotating component) and Bearing block (7) (Stationary component). Hence during Spindle (4) rotation, no vacuum gets created at clearance area. This in-turn prevents sucking of grease and dust particle (Foreign particle) into bearing area.
2. Cable stopper (10) provided in Bearing block (7) to prevent the cable get loading on spindle (4) during rotation. This also prevents dust or grease (Foreign particle) entry to some extend.
3. Reduced Bore length in Bush sintered (8). Hence Design for manufacturing is ensured.
4. The reduced bearing length reduces friction with spindle (4). 5. Space available in Speedo movement at bearing block (7) area for grease / dust (Foreign particle) accumulation if entered into Speedo movement.
6. Elimination of Holder (5). Hence parts count reduction in Speedo movement and elimination of one assembly station.
The above advantages in-turn increases the life and reliability of Speedo movement. Hence the cost of Speedo movement is reduced.
Claims
1. An improved spindle (4) and magnet (2) assembly of Speedo movement for automobiles, said assembly comprises, - a. cable stopper (10) provided in-bearing block (7) to prevent cable get loaded onto spindle (4) during rotation; and b. bush sintered (8) having reduced bore length to ease friction with the spindle (4).
2. The spindle (4) and magnet (2) assembly as claimed in claim 1, wherein the reduction in bore length is ranging from 30% to 60%.
3. The spindle (4) and magnet (2) assembly as claimed in claim 1, wherein the assembly comprises; a. compensator (1), magnet (2) and worm (9) resided inside the spindle (4); and b. lower washer (6) placed between the bush sintered (8) and the spindle (4) and upper washer (3) located above the bush sintered (8).
4. The spindle (4) and magnet (2) assembly as claimed in claim 1 , wherein the bush sintered (8) acts as bearing for the spindle (4) assembly to reduce friction between stationary and rotating components.
5. The spindle (4) and magnet (2) assembly as claimed in claim 1, wherein the assembly provides increased clearance area between spindle (4) and the bearing block (7) which prevents creation of vacuum at the clearance area and thereby prevents sucking of foreign particles comprising grease and dust particles into the bearing area.
6. . A method of assembling spindle (4) and magnet (2) assembly of Speedo movement for automobiles, said method comprising steps of a. inserting lower washer (6) into spindle (4) and thereafter said spindle (4) into bearing block (7); b. press fitting bush sintered (8) with the bearing block (7) by guiding the bush sintered (8) bore with the spindle (4); c. crimping the bearing block (7) to arrest upward movement of bush sintered (8); and d. inserting worm (9), magnet (2) and compensator (1) into the spindle (4) and thereafter flaring the spindle (4) at the magnet (2) end to arrest upward movement of the magnet (2) and worm (9) and downward movement of the spindle (4) to obtain the assembly.
7. The method as claimed in claim 6, wherein the method provides increased clearance area between spindle (4) and the bearing block (7) by eliminating holder (5) from the assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07827539A EP2165202A4 (en) | 2007-07-05 | 2007-08-22 | Spindle and magnet system for speedometers |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IN01454/CHE/2007 | 2007-07-05 | ||
| IN1454CH2007 | 2007-07-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2009004640A1 true WO2009004640A1 (en) | 2009-01-08 |
Family
ID=40225734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IN2007/000362 WO2009004640A1 (en) | 2007-07-05 | 2007-08-22 | Spindle and magnet system for speedometers |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP2165202A4 (en) |
| WO (1) | WO2009004640A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015129483A1 (en) * | 2014-02-28 | 2015-09-03 | 日本精機株式会社 | Instrument device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2123558A (en) * | 1982-07-08 | 1984-02-01 | Eaton Sa Monaco | Tacho-generators |
| US4575356A (en) * | 1981-05-13 | 1986-03-11 | Yazaki Corporation | Connection for flexible cable and speedometer |
| JPH08233112A (en) * | 1995-03-02 | 1996-09-10 | Yazaki Corp | Seal structure of rotary shaft |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1209922B (en) * | 1963-10-25 | 1966-01-27 | Skf Kugellagerfabriken Gmbh | Spinning or twisting spindle |
| GB1196704A (en) * | 1968-04-05 | 1970-07-01 | Smiths Industries Ltd | Improvements in or relating to Indicating Instruments. |
| US3839882A (en) * | 1973-05-04 | 1974-10-08 | Chrysler Corp | Speedometer cable noise absorption member |
| US4646042A (en) * | 1985-02-08 | 1987-02-24 | Hi-Stat Manufacturing Co., Inc. | Speed and distance sensor |
-
2007
- 2007-08-22 WO PCT/IN2007/000362 patent/WO2009004640A1/en active Application Filing
- 2007-08-22 EP EP07827539A patent/EP2165202A4/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4575356A (en) * | 1981-05-13 | 1986-03-11 | Yazaki Corporation | Connection for flexible cable and speedometer |
| GB2123558A (en) * | 1982-07-08 | 1984-02-01 | Eaton Sa Monaco | Tacho-generators |
| JPH08233112A (en) * | 1995-03-02 | 1996-09-10 | Yazaki Corp | Seal structure of rotary shaft |
Non-Patent Citations (1)
| Title |
|---|
| DATABASE WPI Week 199646, Derwent World Patents Index; AN 1996-462527, XP008117446 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015129483A1 (en) * | 2014-02-28 | 2015-09-03 | 日本精機株式会社 | Instrument device |
| JP2015161652A (en) * | 2014-02-28 | 2015-09-07 | 日本精機株式会社 | Instrument device |
| CN106030313A (en) * | 2014-02-28 | 2016-10-12 | 日本精机株式会社 | Instrument device |
| CN106030313B (en) * | 2014-02-28 | 2019-02-15 | 日本精机株式会社 | Metering device |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2165202A4 (en) | 2011-11-30 |
| EP2165202A1 (en) | 2010-03-24 |
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