CN203836156U - Arrangement structure for reverse idler gear of transmission - Google Patents
Arrangement structure for reverse idler gear of transmission Download PDFInfo
- Publication number
- CN203836156U CN203836156U CN201420167779.1U CN201420167779U CN203836156U CN 203836156 U CN203836156 U CN 203836156U CN 201420167779 U CN201420167779 U CN 201420167779U CN 203836156 U CN203836156 U CN 203836156U
- Authority
- CN
- China
- Prior art keywords
- gear
- reverse
- speed changer
- idler gear
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 40
- 238000005096 rolling process Methods 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 13
- 210000004907 gland Anatomy 0.000 claims description 10
- 238000012856 packing Methods 0.000 claims description 9
- 229910000906 Bronze Inorganic materials 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 4
- 239000010974 bronze Substances 0.000 claims description 4
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- General Details Of Gearings (AREA)
- Structure Of Transmissions (AREA)
Abstract
The utility model provides an arrangement structure for a reverse idler gear of a transmission. The transmission comprises a shell, a secondary shaft and an intermediate shaft, wherein the secondary shaft and the intermediate shaft are arranged in the shell. The shell comprises a front transmission shell body and a rear transmission shell body, wherein the front transmission shell body and the rear transmission shell body are matched and tightly connected. A reverse gear fixedly arranged on the intermediate shaft and a secondary shaft reverse gear idled on the secondary shaft are simultaneously meshed with the reverse idler gear. Arc grooves are formed in the portions, corresponding to the reverse idler gear, of the front transmission shell body and the rear transmission shell body. The reverse idler gear is supported by a reverse gear shaft in a rolling mode. The two ends of the reverse gear shaft are fixed into the front transmission shell body and the rear transmission shell body through formed threaded holes respectively, bolt via holes are formed in the corresponding threaded holes in the front transmission shell body and the rear transmission shell body, and fastening bolts for fixing the reverse gear shaft penetrate through the bolt via holes to be connected with the threaded holes in a matched mode. The reverse idler gear is reliably positioned through the arc grooves, and the arrangement structure is simple, reasonable in design, fewer in parts, reliable in positioning and convenient to assemble.
Description
Technical field
The utility model belongs to automotive transmission field, is specially a kind of transmission reverse gear intermediate gear layout.
Background technique
The structure of reversing gear of intermediate shaft type speed changer is generally adopted in two ways, a kind of scheme is to utilize on case of transmission, to offer window, on scuttle, be provided with boss, boss has hole, the jack shaft that reverses gear is installed in hole, on the jack shaft that reverses gear, the countershaft-gear that reverses gear is installed, gear jack shaft is fixed on boss and can not be rotated by pin, after scuttle covers window and fixes, the countershaft-gear that reverses gear engages with transmission countershaft reverse gear and two axle reverse gears simultaneously; Another kind of scheme is that a boss is set on case of transmission inwall, reverse gear on jack shaft reverse gear is installed, the jack shaft one end of reversing gear is arranged in the hole of speed changer inwall boss, the other end is arranged on speed changer bonnet, the jack shaft that reverses gear is provided with pin-and-hole, is provided with the pin that the jack shaft that prevents from reversing gear rotates in pin-and-hole; This two schemes is installed inconvenience, and sealing effect is poor.
Model utility content
For problems of the prior art, the utility model provides a kind of transmission reverse gear intermediate gear layout, and location is reliable, and component are few, easy to assembly.
The utility model is to be achieved through the following technical solutions:
A kind of transmission reverse gear intermediate gear layout, speed changer comprises housing, and is arranged on two axles and jack shaft in housing; Housing comprises speed changer front case and the speed changer rear case of the airtight connection that cooperatively interacts, and on the reverse gear being fixedly installed on jack shaft and two axles, two axle reverse gears of empty set engage with reverse idler gear simultaneously; The position of the corresponding reverse idler gear of speed changer front case and speed changer rear case is provided with arc groove, for holding reverse idler gear; Reverse idler gear rolling support is on reverse gear shaft; The two ends of reverse gear shaft are fixed in speed changer front case and speed changer rear case by the tapped hole arranging respectively, on speed changer front case and speed changer rear case, corresponding tapped hole is provided with bolt through-hole, is connected through bolt through-hole and tapped hole for the clamping bolt of fixing reverse gear shaft.
Preferably, reverse idler gear is arranged on speed changer front case and speed changer rear case connecting end surface and is positioned at a side of speed changer front case.
Preferably, between clamping bolt and housing, be provided with stuffing box gland and the packing ring for sealing; Clamping bolt is combined in stuffing box gland sealing pressing in the aperture rounded surface of corresponding bolt through-hole outer end by packing ring.
Further, clamping bolt adopts for locking pre-gluing bolt.
Further, reverse idler gear is supported on reverse gear shaft by needle bearing.
Further, the both sides of reverse idler gear are respectively arranged with the thrust washer for axially locating.
Further again, thrust washer adopts tin bronze material to make.
Preferably, the radius of arc groove is identical with the radius of reverse idler gear, and arc groove madial wall and reverse idler gear both sides are gap and arrange.
Preferably, speed changer front case and speed changer rear case are bolted, and centre is provided with the liner for sealing.
Compared with prior art, the utlity model has following useful technique effect:
The utility model is by adding the scheme of a reverse idler gear in the gear transmission route on jack shaft and two axles, make reverse idler gear in the time of transmission as driven wheel again as driving wheel, the axial force that gear transmission can be produced be cancelled out each other; By the arc groove arranging on speed changer front case and speed changer rear case, thereby can realize reliable location to reverse idler gear, simple in structure, reasonable in design, component are few, and location is reliable, easy to assembly.
Further, realize fixing to reverse gear shaft by clamping bolt from outside, power that gear engagement produces and the gravity of reverse idler gear are born by clamping bolt and housing respectively, the setting that simplifies the structure, has optimized stress transmission.
Further, utilize the pressing of stuffing box gland, realize itself and casing joint surface formation sealed environment, ensured good sealing effect; And by adopting pre-gluing bolt, just can play anti-loosing effect without other anti-release member.
Further, when utilizing needle bearing to realize reverse idler gear rotation, reverse idler gear bearing capacity and transmission efficiency have been improved.
Further, can prevent that by the setting of thrust washer reverse idler gear from contacting with the direct of housing, the parts depreciation of having avoided axial float to produce; The employing tin bronze material of optimizing, makes its intensity high, and wear resistance is good, long service life.
Further, utilize the arc groove arranging with radius, can make full use of the shared assembly space of reverse idler gear, on the basis that space is provided, avoided frictional loss between the two; And ensure the sealing of housing connecting end surface by liner, improved overall sealability.
Brief description of the drawings
Fig. 1 is the structure sectional view described in the utility model example.
Fig. 2 is the left view of the speed changer rear case connecting end surface of Fig. 1.
Fig. 3 is the structure enlarged diagram of Fig. 1 tightened bolt presses end face.
Fig. 4 is the force analysis figure of reverse gear shaft described in the utility model example.
In figure: 1 speed changer front case, 2 thrust washers, 3 reverse idler gears, 4 needle bearings, 5 reverse gear shafts, 6 speed changer rear cases, 7 clamping bolts, 8 stuffing box glands, 9 packing rings, 10 liners.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
A kind of transmission reverse gear intermediate gear of the utility model layout, as depicted in figs. 1 and 2, speed changer front case 1 is bolted with speed changer rear case 6, and centre has liner 10 to seal.Reverse idler gear 3 is supported on reverse gear shaft 5 by roller bearing 4, and there is thrust washer 6 reverse idler gear 3 both sides for axially locating.Reverse gear shaft 5 two ends are processed with two tapped holes, correspondence is processed with bolt through-hole on the forward and backward housing of speed changer, reverse gear shaft 5 is strained by clamping bolt 7, as shown in Figure 3, for ensureing and the sealing of housing joint, be designed with stuffing box gland 8 and packing ring 9, after clamping bolt 7 is tightened, packing ring 9 is pressed on stuffing box gland 8 in the aperture rounded surface of bolt through-hole outer end, and sealing effect is good.
In this preferred embodiment, as depicted in figs. 1 and 2, reliably locate in order to make reverse idler gear 3, on the forward and backward housing of speed changer, be designed with arc groove, the radius of arc groove equates with the radius of reverse idler gear 3, reverse gear shaft 5 is realized fixing near the arc groove of housing by two clamping bolts 7, as shown in Figure 2.The power being produced by gear engagement and the gravity of reverse idler gear 3 are born by bolt and case of transmission respectively, and location is reliable, easy to assembly.
Because the forward and backward housing design of speed changer has arc groove, if the breast wheel 3 that reverses gear directly contacts with housing, in Meshing Process of Spur Gear, there is unavoidably axial float, part is easy to wear.Between reverse idler gear 3 and housing, be designed with thrust washer 2, this preferred embodiment adopts tin bronze material for this reason, and intensity is high, wear resistance good.
Concrete, reverse gear shaft 5 is supported on respectively on the forward and backward housing of speed changer, and correspondence is processed with bolt through-hole on the forward and backward housing of speed changer.As shown in Figure 3, in order to make to install the rear reliable sealing of clamping bolt 7, increase stuffing box gland 8 in housing bolt aperture, directly contact as packing ring 9 with stuffing box gland 8, after clamping bolt 7 is fastening, packing ring 9 press seal covers 8 form sealed environment with casing joint surface, and sealing effect is good, in this preferred embodiment, describes as an example of copper washer example.Wherein, reverse gear shaft 5 hole processing are tapped through hole, adopt pre-gluing bolt, can play relaxation effect.
As shown in Figure 4, in gear transmission route on jack shaft and the second axle, add a reverse idler gear 3, from clutch end to speed changer one axle direction, namely from the right side of structure shown in Fig. 1, reverse idler gear 3 is arranged in the left side of speed changer, the force analysis of reverse gear shaft 5 as shown in Figure 4, reverse idler gear 3 is driven by the corresponding gear on jack shaft as driven wheel in transmission process, drive the reverse gear on two axles as driving wheel again, so because the axial force that Helical gear Transmission produces can be cancelled out each other, making a concerted effort is zero; The resultant radial force being subject to is as shown in F1 in Fig. 4, therefore the bearing pretightening force F2 on the one hand of the screw thread in reverse gear shaft 5 upper screwed holes, bear on the other hand the radial force producing in Meshing Process of Spur Gear, by designing and calculating, can determine suitable bolt size and strength grade.Can realize the reliable of reverse idler gear 3 fixed, part is few, simple in structure, and assembling is simple.
Claims (9)
1. a transmission reverse gear intermediate gear layout, is characterized in that, speed changer comprises housing, and is arranged on two axles and jack shaft in housing; Housing comprises speed changer front case (1) and the speed changer rear case (6) of the airtight connection that cooperatively interacts, and on the reverse gear being fixedly installed on jack shaft and two axles, two axle reverse gears of empty set engage with reverse idler gear (3) simultaneously; The position of speed changer front case (1) and the corresponding reverse idler gear of speed changer rear case (6) (3) is provided with arc groove, for holding reverse idler gear (3); Reverse idler gear (3) rolling support is on reverse gear shaft (5); The two ends of reverse gear shaft (5) are fixed in speed changer front case (1) and speed changer rear case (6) by the tapped hole arranging respectively, the upper corresponding tapped hole of speed changer front case (1) and speed changer rear case (6) is provided with bolt through-hole, is connected through bolt through-hole and tapped hole for the clamping bolt (7) of fixing reverse gear shaft (5).
2. a kind of transmission reverse gear intermediate gear layout according to claim 1, it is characterized in that, described reverse idler gear (3) is arranged on speed changer front case (1) and speed changer rear case (6) connecting end surface and is positioned at a side of speed changer front case (1).
3. a kind of transmission reverse gear intermediate gear layout according to claim 1, is characterized in that, is provided with stuffing box gland (8) and packing ring (9) for sealing between clamping bolt (7) and housing; Clamping bolt (7) is combined in stuffing box gland (8) sealing pressing in the aperture rounded surface of corresponding bolt through-hole outer end by packing ring (9).
4. a kind of transmission reverse gear intermediate gear layout according to claim 3, is characterized in that, described clamping bolt (7) adopts for locking pre-gluing bolt.
5. a kind of transmission reverse gear intermediate gear layout according to claim 1 and 2, is characterized in that, reverse idler gear (3) is supported on reverse gear shaft (5) by needle bearing (4).
6. a kind of transmission reverse gear intermediate gear layout according to claim 1 and 2, is characterized in that, the both sides of reverse idler gear (3) are respectively arranged with the thrust washer (2) for axially locating.
7. a kind of transmission reverse gear intermediate gear layout according to claim 6, is characterized in that, described thrust washer (2) adopts tin bronze material to make.
8. a kind of transmission reverse gear intermediate gear layout according to claim 1, is characterized in that, the radius of arc groove is identical with the radius of reverse idler gear (3), and arc groove madial wall and reverse idler gear (3) both sides are gap and arrange.
9. a kind of transmission reverse gear intermediate gear layout according to claim 1, is characterized in that, speed changer front case (1) and speed changer rear case (6) are bolted, and centre is provided with the liner (10) for sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420167779.1U CN203836156U (en) | 2014-04-09 | 2014-04-09 | Arrangement structure for reverse idler gear of transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420167779.1U CN203836156U (en) | 2014-04-09 | 2014-04-09 | Arrangement structure for reverse idler gear of transmission |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203836156U true CN203836156U (en) | 2014-09-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420167779.1U Expired - Lifetime CN203836156U (en) | 2014-04-09 | 2014-04-09 | Arrangement structure for reverse idler gear of transmission |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203836156U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546100A (en) * | 2016-02-04 | 2016-05-04 | 重庆青山工业有限责任公司 | Rear-drive transmission reverse-gear structure |
-
2014
- 2014-04-09 CN CN201420167779.1U patent/CN203836156U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105546100A (en) * | 2016-02-04 | 2016-05-04 | 重庆青山工业有限责任公司 | Rear-drive transmission reverse-gear structure |
| CN105546100B (en) * | 2016-02-04 | 2018-06-19 | 重庆青山工业有限责任公司 | A kind of rear-guard speed variator reverse gear structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140917 |
|
| CX01 | Expiry of patent term |