CN216643033U - Engineering vehicle gearbox idler mounting structure - Google Patents
Engineering vehicle gearbox idler mounting structure Download PDFInfo
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- CN216643033U CN216643033U CN202122765610.9U CN202122765610U CN216643033U CN 216643033 U CN216643033 U CN 216643033U CN 202122765610 U CN202122765610 U CN 202122765610U CN 216643033 U CN216643033 U CN 216643033U
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- tapered roller
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Abstract
The utility model provides an idler wheel mounting structure of an engineering vehicle gearbox, which comprises an idler wheel shaft, a first support and a second support, wherein a through hole is formed in the first support, a blind hole is formed in the second support, the idler wheel shaft comprises a first section and a middle section, the first section is inserted in the through hole, a tail section is inserted in the blind hole, a through hole is formed in the idler wheel shaft, a bolt is inserted in the through hole, two conical roller bearings are sleeved on the middle section, one conical roller bearing abuts against the first section, the other conical roller bearing abuts against the second support, the same idler wheel is sleeved on the two conical roller bearings, and a positioning piece is arranged on the side wall of an inner hole of the idler wheel. The utility model utilizes the first section to press the two tapered roller bearings on the bracket, and the clearance of the two tapered roller bearings can be adjusted by utilizing the positioning piece, so that the production cost is relatively low and the production and assembly efficiency is relatively high.
Description
Technical Field
The utility model relates to a local structure of an engineering vehicle gearbox, in particular to an idler wheel mounting structure of the engineering vehicle gearbox.
Background
The vehicle power system generally comprises a transmission case and a transmission case, wherein the transmission case needs to generally comprise a transmission case body, an idler shaft arranged in the transmission case body and an idler wheel sleeved on the idler shaft so as to realize the reverse gear function of the vehicle. In a traditional gearbox, only a shaft sleeve is arranged between an idler wheel and an idler wheel shaft, however, in the using process, the idler wheel is in end face contact with a gearbox body due to axial force, abrasion is further generated, the service life is influenced, for a household car, due to the fact that the frequency of reverse gear use is relatively low, the influence caused by abrasion of the idler wheel and the gearbox body is relatively unobvious, but for engineering vehicles such as an excavator and the like with relatively high reverse gear use frequency, the abrasion of the idler wheel and the gearbox body can influence the normal work of the vehicles.
Chinese utility model patent with publication number CN211715723U is a variable speed transmission structure developed by the applicant, and it includes the gearbox body and sets up the internal idler shaft of gearbox, the last cover of idler shaft is equipped with two first bearings that can bear the axial force of mutual disposition, two be formed with the clearance between the first bearing, and two the cover is equipped with same idler on the first bearing. By arranging the two first bearings which are oppositely arranged, the idle wheel is replaced to bear the action of axial force, the action of the axial force on the idle wheel is fundamentally eliminated, and further the abrasion of the axial force of the idle wheel on the gearbox body is eliminated. However, since the first bearing is a tapered roller bearing, the play of the tapered roller bearing needs to be adjusted by the retainer ring, and machining tolerance is inevitably existed in the machining of parts, so that the tapered roller bearing can have assembly tolerance during assembly, and in order to avoid the assembly tolerance from affecting the play of the tapered roller bearing, retainer rings with different thicknesses need to be prepared during production, so that the retainer rings can be selected according to actual assembly tolerance, thereby increasing the production cost and reducing the production and assembly efficiency.
In view of the above, the applicant has made an intensive study on an idle wheel mounting structure of a transmission of an engineering vehicle, and has developed the present invention.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an idler wheel mounting structure of a gearbox of an engineering vehicle, which has relatively low production cost and relatively high production and assembly efficiency.
In order to achieve the purpose, the utility model adopts the following technical scheme:
an idler wheel mounting structure of a gearbox of an engineering vehicle comprises an idler wheel shaft, a first support and a second support, wherein the first support and the second support are fixedly arranged relative to each other;
the idler shaft comprises a first section, a middle section and a tail section which are sequentially connected, the first section is inserted into the through hole, the diameter of the first section is matched with that of the through hole, the tail section is inserted into the blind hole, the diameter of the tail section is matched with that of the blind hole, the diameter of the middle section is smaller than that of the first section, and the diameter of the middle section is larger than or equal to that of the tail section;
the cover is equipped with two mutual disposition's tapered roller bearing on the interlude, one of them tapered roller bearing supports the top the first section orientation perhaps support simultaneously on the side of interlude one side and the first section orientation on the side of interlude one side, another tapered roller bearing supports the top on the second support, first support or still be connected with on the second support and be used for with the first section compresses tightly corresponding limit structure on the tapered roller bearing, two the last cover of tapered roller bearing is equipped with same idler, be provided with on the lateral wall of the hole of idler and be used for with two the setting element that tapered roller bearing separates.
As a refinement of the present invention, the first mount or the second mount is a transmission side wall.
As an improvement of the utility model, a counter bore which is coaxially arranged with the through hole is formed at one end of the idler shaft corresponding to the first section, and a nut of the bolt is positioned in the counter bore.
As an improvement of the utility model, the positioning element is a positioning convex ring fixedly connected or integrally connected to the side wall of the inner hole of the idler wheel, and the outer rings of the two tapered roller bearings respectively abut against the positioning convex ring.
As an improvement of the utility model, a positioning ring is arranged on the side wall of the inner hole of the idler wheel, the positioning piece is an elastic snap ring inserted into the positioning ring, and the outer rings of the two tapered roller bearings respectively and directly or indirectly abut against the elastic snap ring.
As an improvement of the utility model, the side surface of the elastic snap ring is pasted with a check ring.
As an improvement of the utility model, the middle section is further sleeved with a spacer sleeve positioned between the two tapered roller bearings, and inner rings of the two tapered roller bearings directly or indirectly abut against the spacer sleeve respectively.
As an improvement of the utility model, a threaded hole is formed at the bottom of the blind hole, the diameter of the through hole is larger than that of the blind hole, a through hole arranged along the length direction of the idler shaft is formed on the idler shaft, a bolt screwed on the threaded hole is inserted into the through hole, a nut of the bolt abuts against the idler shaft, and the bolt, the threaded hole and the through hole together form the limiting structure.
As an improvement of the utility model, the limiting structure comprises a limiting plate detachably and fixedly connected to one side of the first support far away from the second support, and the first section directly or indirectly abuts against the limiting plate.
As an improvement of the utility model, the limiting structure further comprises a limiting gasket located between the limiting plate and the first segment.
By adopting the technical scheme, the utility model has the following beneficial effects:
through setting up the idler shaft into the step axle that has first section and middle part to set up the through-hole on the idler shaft, can utilize the first section to compress tightly two tapered roller bearings on the support, and two tapered roller bearing's play can utilize the setting element to adjust before installing, and need not to prepare the retaining ring of multiple different thickness when early production, manufacturing cost is lower relatively and production assembly efficiency is higher relatively.
Drawings
FIG. 1 is a schematic view of an idler mounting structure of a transmission of a work vehicle according to an embodiment;
FIG. 2 is a schematic diagram of an idler mounting structure of a transmission of a work vehicle according to a second embodiment.
The designations in the figures correspond to the following:
10-an idler shaft; 11-first stage;
12-middle section; 13-tail section;
14-a through hole; 15-counter bore;
20-a first support; 30-a second support;
31-blind hole; 32-a threaded hole;
40-bolt; 50-tapered roller bearings;
60-a positioning element; 61-a retainer ring;
62-spacer bush; 70-an idler wheel;
81-limiting plate; 82-a spacing washer;
83-connecting bolt.
Detailed Description
The utility model is further described with reference to the following figures and specific embodiments.
The first embodiment.
As shown in fig. 1, the present embodiment provides an idler mounting structure for a gearbox of an engineering vehicle, which includes an idler shaft 10 and a first support 20 and a second support 30 that are fixedly arranged relative to each other, where the first support 20 or the second support 30 is a side wall of the gearbox, that is, one side wall of a casing of the gearbox is taken as a support, and in the present embodiment, the side wall of the gearbox is taken as an example for the first support 20, and the second support 30 is fixedly connected or integrally connected to the casing of the gearbox, so as to realize the relatively fixed arrangement between the first support 20 and the second support 30. It should be noted that the embodiment is only an improvement on the idler mounting structure in the transmission, and other structures in the transmission which are matched with the idler are all structures of a conventional transmission, which is not the focus of the embodiment, and thus, detailed description is omitted here.
The first support 20 is provided with a through hole, one side of the second support 30 facing the first support 20 is provided with a blind hole 31 arranged corresponding to the through hole, the bottom of the blind hole 31 is provided with a threaded hole 32, the diameter of the through hole is larger than that of the blind hole 31, the diameter of the blind hole 31 is larger than the nominal diameter of the threaded hole 32, and the through hole, the blind hole 31 and the threaded hole 32 are preferably arranged coaxially.
The idler shaft 10 is simultaneously inserted in the through hole and the blind hole 31, specifically, the idler shaft 10 includes the first section 11, the middle section 12 and the tail section 13 that connect gradually, wherein, the diameter of middle section 12 is less than the diameter of first section 11, and the diameter of middle section 12 is greater than or equal to the diameter of tail section 13, and is preferred, and the diameter of middle section 12 is greater than the diameter of tail section 13, is convenient for fix a position fast when the installation. In addition, the idler shaft 10 is provided with a through hole 14 arranged along the length direction of the idler shaft 10, that is, the through hole 14 simultaneously penetrates through the first section 11, the middle section 12 and the tail section 13.
The first section 11 is inserted into the through hole, the diameter of the first section 11 is matched with that of the through hole, the tail section 13 is inserted into the blind hole 31, the diameter of the tail section 13 is matched with that of the blind hole 31, the bolt 40 which is spirally connected to the threaded hole 32 is inserted into the through hole 14, and the nut (namely, the bolt head) of the bolt 40 abuts against the idler shaft 10; preferably, a counter bore 15 which is coaxial with the through hole 14 is formed in one end of the idler shaft 10 corresponding to the first section 11, and a nut of the bolt 40 is located in the counter bore 15, so that the nut of the bolt 40 can be prevented from being exposed outside a box body of the gearbox.
The intermediate section 12 is sleeved with two tapered roller bearings 50 which are oppositely arranged, wherein one tapered roller bearing 50 abuts against the side surface of the first section 11 facing the side of the intermediate section 12 (at this time, the first section 11 penetrates through the through hole) or abuts against the first support 20 and the side surface of the first section 11 facing the side of the intermediate section 12 (at this time, the side surface of the first section 11 facing the side of the intermediate section 12 is flush with the corresponding side surface of the first support 20), and the other tapered roller bearing 50 abuts against the second support 30, so that the axial positions of the two tapered roller bearings 50 are limited. Of course, a limiting structure for pressing the first segment 11 against the corresponding tapered roller bearing 50 is further connected to the first support 20 or the second support 30, and in this embodiment, the limiting structure is disposed on the second support 30 and mainly includes the bolt 40, the threaded hole 32, and the through hole 14, that is, the bolt 40, the threaded hole 32, and the through hole 14 together form the limiting structure. The two tapered roller bearings 50 are fitted with the same idler gear 70, and a spacer 60 for spacing the two tapered roller bearings 50 is provided on a side wall of an inner bore of the idler gear 70 so as to define a play of the tapered roller bearings 50.
The positioning member 60 may be a conventional positioning member, for example, the positioning member 60 is a positioning convex ring fixedly connected or integrally connected to a side wall of an inner hole of the idler pulley 70 or a spacer sleeve sleeved on the idler pulley 70, and outer rings of the two tapered roller bearings 50 respectively abut against the positioning convex ring. Considering that if the positioning convex ring is fixedly connected to the side wall of the inner hole of the idler 70, a welding procedure needs to be added during processing, and the cost is increased, and if the positioning convex ring is integrally connected to the idler 70, when the inner hole of the idler 70 is processed, a part on one side of the positioning convex ring needs to be processed first, and after re-clamping, a part on the other side of the positioning convex ring needs to be processed, so that the coaxiality of the inner hole of the idler 70 is affected, in the embodiment, the positioning ring is arranged on the side wall of the inner hole of the idler 70, so that only one-time clamping is needed during processing the inner hole of the idler, the coaxiality is relatively high, the positioning piece 60 is an elastic snap ring inserted into the positioning ring, the outer rings of the two conical roller bearings 50 respectively and directly or indirectly abut against the elastic snap ring, preferably, the side faces of the elastic snap ring are provided with the retaining rings 61, the outer ring of one conical roller bearing 50 directly abuts against the elastic snap ring, and the outer ring of the other conical roller bearing indirectly abuts against the elastic snap ring by abutting against the retaining ring 61, this makes it possible to reduce the thickness of the snap ring without reducing the spacing between the two tapered roller bearings 50. In addition, in order to avoid that the bolt 40 is locked too tightly, which causes the inner rings of the two tapered roller bearings 50 to be pushed towards each other, thereby reducing the play, the intermediate section 12 is further sleeved with a spacer 62 located between the two tapered roller bearings 50, and the inner rings of the two tapered roller bearings 50 respectively and directly or indirectly abut against the spacer 52, wherein the abutting of the tapered roller bearings 50 against the spacer 52 means that an adjusting gasket is arranged between the two, thereby facilitating the adjustment of the play.
During installation, the elastic snap ring is clamped in the positioning ring of the idler wheel 70, the retainer ring 61 penetrates into the inner hole of the idler wheel 70, the spacer 62 is placed into the inner hole of the idler wheel 70, the two tapered roller bearings 50 penetrate through the two ends of the inner hole of the idler wheel 70 respectively and clamp the spacer 62 to form a pre-assembly, the pre-assembly is placed between the first support 20 and the second support 30, the idler wheel shaft 10 sequentially penetrates through the through hole, the pre-assembly and the blind hole 31 to support the pre-assembly, and finally the bolt penetrates through the through hole 14 and is spirally connected to the threaded hole 32, so that the idler wheel 70 is installed.
Example two.
As shown in fig. 2, the difference between the first embodiment of the idle gear mounting structure of the transmission of the engineering vehicle provided in the present embodiment and the second embodiment of the idle gear mounting structure of the transmission of the engineering vehicle provided in the present embodiment is that the limiting structure is different, specifically, the limiting structure of the present embodiment is connected to the first support 20, the limiting structure includes a limiting plate 81 detachably and fixedly connected to one side of the first support 20 away from the second support 30 and a limiting gasket 82 located between the limiting plate 81 and the first segment 11, wherein the limiting plate 81 is detachably connected to the first support 20 through a connecting bolt 83, so as to indirectly compress the limiting plate 81 through compressing the limiting gasket 82, and prevent the end of the first segment 11 from being completely located in the through hole 15 and being unable to contact with the limiting plate 81, and certainly, if the end of the first segment 11 penetrates through the through hole 15, the first segment 11 may also directly abut against the limiting plate 81. The retainer plate 81 and the retainer washer 82 may abut against each other, may be fixedly connected or integrally connected, and the spacer 62 (see fig. 1) may or may not be provided because the bolt 40 in the first embodiment is not provided.
The present invention is described in detail with reference to the attached drawings, but the embodiments of the present invention are not limited to the above embodiments, and those skilled in the art can make various modifications to the present invention based on the prior art, which fall within the scope of the present invention.
Claims (10)
1. The idle wheel mounting structure of the gearbox of the engineering vehicle is characterized by comprising an idle wheel shaft, a first support and a second support, wherein the first support and the second support are relatively fixedly arranged;
the idler shaft comprises a first section, a middle section and a tail section which are sequentially connected, the first section is inserted into the through hole, the diameter of the first section is matched with that of the through hole, the tail section is inserted into the blind hole, the diameter of the tail section is matched with that of the blind hole, the diameter of the middle section is smaller than that of the first section, and the diameter of the middle section is larger than or equal to that of the tail section;
the cover is equipped with two mutual disposition's tapered roller bearing on the interlude, one of them tapered roller bearing supports the top the first section orientation perhaps support simultaneously on the side of interlude one side and the first section orientation on the side of interlude one side, another tapered roller bearing supports the top on the second support, first support or still be connected with on the second support and be used for with the first section compresses tightly corresponding limit structure on the tapered roller bearing, two the last cover of tapered roller bearing is equipped with same idler, be provided with on the lateral wall of the hole of idler and be used for with two the setting element that tapered roller bearing separates.
2. The work vehicle transmission idler mounting structure of claim 1, wherein the first seat or the second seat is a transmission side wall.
3. The idle wheel mounting structure of the gearbox of the engineering vehicle as claimed in claim 1, wherein the positioning member is a positioning convex ring fixedly or integrally connected to a side wall of an inner hole of the idle wheel, and outer rings of the two tapered roller bearings respectively abut against the positioning convex ring.
4. The idle wheel mounting structure of the gearbox of the engineering vehicle as claimed in claim 1, wherein a positioning ring is disposed on a side wall of an inner hole of the idle wheel, the positioning member is an elastic snap ring inserted into the positioning ring, and outer rings of the two tapered roller bearings respectively and directly or indirectly abut against the elastic snap ring.
5. The idler mounting structure for a gearbox of a construction vehicle as claimed in claim 4, wherein a retainer ring is attached to a side surface of the resilient snap ring.
6. The engineering vehicle transmission idler wheel mounting structure according to any one of claims 1-4, wherein the intermediate section is further sleeved with a spacer sleeve positioned between the two tapered roller bearings, and inner rings of the two tapered roller bearings respectively and directly or indirectly abut against the spacer sleeve.
7. The idle gear mounting structure for the gearbox of the engineering vehicle as claimed in any one of claims 1 to 4, wherein a threaded hole is formed in the bottom of the blind hole, the diameter of the through hole is larger than that of the blind hole, a through hole is formed in the idle shaft and arranged along the length direction of the idle shaft, a bolt screwed in the threaded hole is inserted into the through hole, a nut of the bolt abuts against the idle shaft, and the bolt, the threaded hole and the through hole together form the limiting structure.
8. The idle wheel mounting structure for the gearbox of the engineering vehicle as claimed in claim 7, wherein a counter bore arranged coaxially with the through hole is formed at one end of the idle wheel shaft corresponding to the first section, and a nut of the bolt is located in the counter bore.
9. The engineering vehicle gearbox idler mounting structure according to any one of claims 1-5, wherein the limiting structure comprises a limiting plate detachably and fixedly connected to one side of the first support far away from the second support, and the first section directly or indirectly abuts against the limiting plate.
10. The engineered vehicle gearbox idler mounting structure of claim 9, wherein the retaining structure further comprises a retaining washer located between the retaining plate and the leading segment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122765610.9U CN216643033U (en) | 2021-11-12 | 2021-11-12 | Engineering vehicle gearbox idler mounting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122765610.9U CN216643033U (en) | 2021-11-12 | 2021-11-12 | Engineering vehicle gearbox idler mounting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216643033U true CN216643033U (en) | 2022-05-31 |
Family
ID=81734474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122765610.9U Active CN216643033U (en) | 2021-11-12 | 2021-11-12 | Engineering vehicle gearbox idler mounting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216643033U (en) |
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2021
- 2021-11-12 CN CN202122765610.9U patent/CN216643033U/en active Active
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Legal Events
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No. 28, Wucuo Dongsheng Road, Batou village, Anhai Town, Jinjiang City, Quanzhou City, Fujian Province, 362200 Patentee after: Fujian Kehua Transmission Machinery Co.,Ltd. Address before: No. 28, Wucuo Dongsheng Road, Batou village, Anhai Town, Jinjiang City, Quanzhou City, Fujian Province, 362200 Patentee before: JINJIANG KEHUA AUTOMOBILE FITTINGS Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |