CN211737959U

CN211737959U - Connecting structure of gearbox and transmission case

Info

Publication number: CN211737959U
Application number: CN202020102604.8U
Authority: CN
Inventors: 王文科; 王宽镖; 王伟鹏; 王伟达
Original assignee: Jinjiang Kehua Automobile Fittings Co ltd
Current assignee: Jinjiang Kehua Automobile Fittings Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-10-23
Anticipated expiration: 2030-01-17

Abstract

The utility model provides a connection structure of gearbox and transmission case, gearbox body and transmission case including direct interconnect, be located internal two axles of gearbox, being located output shaft and intermeshing's output gear and input gear in the transmission case, the gear shifting port has been seted up to the gearbox body, be formed with the oil storage chamber in the gear shifting port, the draining hole with outside intercommunication is seted up to the bottom in oil storage chamber, be connected with the end cap on the draining hole, the end cap is the magnetism end cap perhaps the end cap is provided with magnet. Through with gearbox body and gearbox body lug connection, during the equipment with gearbox and gearbox as an subassembly after the equipment in advance on assembling the excavator, assembly efficiency is higher relatively, simultaneously because the existence of magnetism end cap or magnet, can be adsorbed by magnetism end cap or magnet after lubricating oil inflow oil storage chamber because of the iron fillings that the break-in produced in the use, effectively avoid parts such as iron fillings damage bearing, life is higher relatively.

Description

Connecting structure of gearbox and transmission case

Technical Field

The utility model relates to a vehicle driving system's local structure, especially a connection structure of gearbox and transmission case.

Background

At present, the gear box and the transmission box of the excavator are generally assembled respectively and then connected with each other when the excavator is assembled, for example, the upper transmission box disclosed in the Chinese utility model with the publication number of CN203272745U, although this type of connection structure facilitates the separate handling of the gearbox or gearbox during maintenance, it also results in the need for a connection flange on the gearbox to support the variable gearbox secondary shaft and the gearbox input gear, the assembly requires first removing the connection flange from the gearbox casing and then connecting the connection flange to the gearbox casing, when the connecting flange is connected on the transmission box body, the assembly process is more complicated, the assembly efficiency is relatively low, in addition, in the using process, scrap iron generated by mutual grinding of transmission parts such as a double shaft of the gearbox is discharged everywhere, parts such as a bearing are easy to damage, and the service life of the transmission box is influenced.

In view of the above, the applicant has made an intensive study on a connection structure of a transmission case and a transmission case, and has developed the present invention.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a connection structure of gearbox and transmission case that assembly efficiency is higher relatively and life is higher relatively.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a connecting structure of a gearbox and a transmission case comprises a gearbox body and a transmission case body which are directly connected with each other, a biaxial positioned in the gearbox body, an output shaft positioned in the transmission case body, and an output gear and an input gear which are mutually meshed, the output gear is sleeved on the output shaft, the input gear is sleeved on the two shafts, a speed change port for the two shafts to penetrate into the transmission case body is arranged at one side of the transmission case body connected with the transmission case body, a supporting seat for supporting the two shafts is arranged in the speed change port, an oil storage cavity is formed at the position of the speed changing port below the supporting seat, an oil drainage hole communicated with the outside is formed at the bottom of the oil storage cavity, and a plug is connected to the oil drainage hole and is a magnetic plug or a magnet is arranged at one end of the plug, which faces the oil storage cavity.

As an improvement of the utility model, the end cap is screwed on the oil drainage hole.

As an improvement of the utility model, the input gear and/or the epaxial gear shaft of corresponding epaxial cover is established to an organic whole connection cover on the output gear, be provided with support bearing between gear shaft and the box that corresponds.

As an improvement of the utility model, offer on the supporting seat and be used for supplying the perforation that the two axles passed, the cover is equipped with on the two axles with the spline housing that the two-axle drive is connected, the input gear cover is established the spline sheathe in and with the spline housing drive is connected, an organic whole is connected with the cover on the input gear and is established gear shaft on the spline housing, the gear shaft with be provided with support bearing between the fenestrate inner wall.

As an improvement of the utility model, be provided with the holding ring on the fenestrate lateral wall, support bearing has two, two support bearing is the inner bearing respectively and is located the inner bearing is kept away from the outer bearing of input gear one side, the inner bearing with the outer bearing is located respectively the both sides of holding ring just support respectively and be in on the holding ring, it is used for with still screwed connection on the gear shaft the outer bearing with the inner bearing compresses tightly nut on the holding ring.

As an improvement of the utility model, the inner bearing with be provided with the cover between the outer bearing and establish the spacer bush on the gear shaft.

As an improvement of the utility model, the two shafts are close to relatively the one end screwed connection of transmission box has to support the top and is in lock nut on the spline housing.

As an improvement of the utility model, the oil through hole for communicating the oil storage cavity with the inner cavity of the transmission box body is arranged on the side wall of the transmission box body.

As an improvement of the utility model, a pot head of output shaft is equipped with tapered roller bearing, just the output shaft is provided with tapered roller bearing's this one end with be provided with between the inside wall of transmission box and support the top and be in last adjusting shim of tapered roller bearing, threaded connection supports the top on the transmission box and is in adjusting shim keeps away from adjusting bolt on tapered roller bearing one side, adjusting bolt keeps away from adjusting shim's one end is located transmission box's outside.

Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:

1. through with gearbox body and gearbox body lug connection, during the equipment with gearbox and gearbox as an subassembly after the equipment in advance on assembling the excavator, assembly efficiency is higher relatively, simultaneously because the existence of magnetism end cap or magnet, can be adsorbed by magnetism end cap or magnet after lubricating oil inflow oil storage chamber because of the iron fillings that the break-in produced in the use, effectively avoid parts such as iron fillings damage bearing, life is higher relatively.

2. Through setting up the pretension nut, can not penetrate the condition of supporting seat with the biax under with input gear and gear shaft preinstallation on the supporting seat in advance, assembly efficiency is higher relatively, and dismantles also comparatively conveniently during the maintenance.

Drawings

Fig. 1 is a schematic view of a connection structure of a transmission case and a transmission case according to the present invention.

The corresponding designations in the figures are as follows:

10-a gearbox body; 11-two axes;

12-a transmission port; 20-a transmission case body;

21-an output shaft; 22-output gear;

23-an input gear; 24-tapered roller bearings;

26-adjusting the shim; 27-adjusting bolts;

28-gear shaft; 30-a support seat;

31-an oil reservoir; 32-oil drainage holes;

33-plug; 34-oil through holes;

35-spline housing; 36-a locking nut;

37-a positioning ring; 38-inner bearing;

39-outer bearing; 40-prelock nuts;

41-spacer bush.

Detailed Description

The utility model is further explained by the following specific embodiments:

as shown in fig. 1, the connection structure of the transmission case and the transmission case provided by this embodiment includes a transmission case body 10 and a transmission case body 20 directly connected to each other, a secondary shaft 11 located in the transmission case body 10, an output shaft 21 located in the transmission case body 20, and an output gear 22 and an input gear 23 engaged with each other, wherein the transmission case body 10 and the transmission case body 20 are fixedly connected to each other by bolts, and inner cavities of the transmission case body 10 and the transmission case body 20 are communicated with each other, specifically, a transmission port 12 for allowing the secondary shaft 11 to penetrate into the transmission case body 20 is opened at one side where the transmission case body 10 and the transmission case body 20 are connected, and a transmission port is opened at a position corresponding to the transmission port 12, and more specifically, the difference between the transmission case body 20 provided by this embodiment and a transmission case body of a conventional excavator is only that a connection flange on the transmission case body of the conventional excavator is removed, the transmission case body 10, the side plate facing one side of the transmission case is removed, and the part connected with the side plate is extended to be connected with the transmission case 20 so as to cover the position of the original connecting flange.

The internal structure of the transmission including the biaxial 11 is basically the same as that of the existing excavator transmission, and in this embodiment, only the connection structure of the end where the biaxial 11 is matched with the input gear 23 is changed.

The output gear 22 is sleeved on the output shaft 21 and is in transmission connection with the output shaft 21, the input gear 23 is sleeved on the secondary shaft 11 and is in transmission connection with the secondary shaft 11, and the specific transmission connection structure can be a conventional structure, such as pin key connection or spline connection. Further, the biaxial shaft 11 and the output shaft 21 are arranged perpendicular to each other, and the output gear 22 and the input gear 23 are both bevel gears. One end of the output shaft 21 penetrates out of the inner cavity of the transmission case 20, the other end of the output shaft is located in the transmission case 20, a tapered roller bearing 24 is sleeved at one end, located in the transmission case 20, of the output shaft 21, an adjusting gasket 26 abutting against the tapered roller bearing 24 is arranged between the end, provided with the tapered roller bearing 24, of the output shaft 21 and the inner side wall of the transmission case 20, meanwhile, an adjusting bolt 27 abutting against the side, far away from the tapered roller bearing 24, of the adjusting gasket 26 is connected to the transmission case 20 in a threaded mode, one end, far away from the adjusting gasket 26, of the adjusting bolt 27 is located outside the transmission case 20, and therefore adjustment of the installation gap of the tapered roller bearing 24 can be achieved through rotating.

Preferably, the input gear 23 and/or the output gear 22 are integrally connected with a gear shaft 28 sleeved on the corresponding shaft, and a support bearing is arranged between the gear shaft 28 and the corresponding box body, in this embodiment, the input gear 23 and the output gear 22 are integrally connected with a gear shaft 28 sleeved on the corresponding shaft, wherein the support bearing on the gear shaft 28 corresponding to the output gear 22 directly abuts against the transmission box body 20, and as for the specific connection structure of the support bearing on the gear shaft 28 corresponding to the input gear 23, detailed description will be given below. By providing the gear shaft 28 and the support bearing, the radial runout of the input gear 23 and the output gear 22 can be effectively suppressed, and the transmission stability can be ensured.

The supporting seat 30 used for supporting the biaxial 11 is arranged in the speed changing port 12, the supporting seat 30 is fixedly connected or integrally connected to the gearbox body 10, an oil storage cavity 31 is formed in the position, below the supporting seat 30, of the speed changing port 12, an oil drainage hole communicated with the outside of the gearbox body 10 is formed in the bottom of the oil storage cavity 31, a plug 33 is connected to the oil drainage hole 32, the plug 33 is a magnetic plug or a magnet is arranged at one end, facing the oil storage cavity 31, of the plug 33, and therefore scrap iron mixed in lubricating oil can be adsorbed by the plug 33 or the magnet. In addition, the end cap 33 is preferably screwed on the oil drainage hole 32, and of course, an internal thread section matched with the end cap 33 needs to be arranged on the inner wall of the oil drainage hole 32, so that the end cap 33 is convenient to disassemble, and the iron chips can be cleaned regularly or irregularly.

Preferably, in the present embodiment, an oil hole 34 is formed in a side wall of the transmission case 20 for communicating the oil storage chamber 31 with an inner chamber of the transmission case 20, so that the lubricating oil in the inner chamber of the transmission case 20 and the lubricating oil in the inner chamber of the transmission case 10 can be communicated with each other, thereby facilitating the filling or replacement of the lubricating oil.

A through hole for the second shaft 11 to pass through is formed in the supporting seat 30, a spline sleeve 35 which is in spline fit with the second shaft 11 to realize transmission connection is sleeved on the second shaft 11, and a locking nut 36 which is abutted against the spline sleeve 35 is in threaded connection with one end, which is relatively close to the transmission case body 20, of the second shaft 11, so that the spline sleeve 35 is prevented from being separated from the second shaft 11; the input gear 23 is sleeved on the spline housing 35 and is in transmission connection with the spline housing 35 through spline fit, and the support bearing located on the gear shaft 28 corresponding to the input gear 23 is arranged between the corresponding gear shaft 28 and the inner wall of the through hole, namely the support bearing is arranged between the gear shaft 28 and the inner wall of the through hole.

Preferably, a positioning ring 37 is provided on the side wall of the through hole, and two support bearings are provided on the gear shaft 28 corresponding to the input gear 23, these are respectively an inner bearing 38 and an outer bearing 39 on the side of the inner bearing 38 remote from the input gear 23, wherein, the inner bearing 38 and the outer bearing 39 are respectively positioned at two sides of the positioning ring 37 and respectively abut against the positioning ring 37, the inner bearing 38 is clamped between the input gear 23 and the positioning ring 37, and a pre-tightening nut 40 which is pressed against the outer bearing 39 is screwed on the gear shaft 28 corresponding to the input gear 23, the pre-tightening nut 40 is used to press the outer bearing 39 and the inner bearing 38 against the positioning ring 37, which not only prevents the gear shaft 28 from moving axially, moreover, the input gear 23 can be pre-installed on the support seat 30 in advance under the condition that the two shafts 11 are not installed, and the installation efficiency is improved. Preferably, in the present embodiment, a spacer 41 is disposed between the inner bearing 38 and the outer bearing 39 and is disposed on the corresponding gear shaft 28, which helps to improve the working stability of each bearing.

The present invention has been described in detail with reference to the accompanying 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 according to the prior art, and these all belong to the protection scope of the present invention.

Claims

1. A connecting structure of a gearbox and a transmission case is characterized by comprising a gearbox body and a transmission case body which are directly connected with each other, a biaxial positioned in the gearbox body, an output shaft positioned in the transmission case body, and an output gear and an input gear which are mutually meshed, the output gear is sleeved on the output shaft, the input gear is sleeved on the two shafts, a speed change port for the two shafts to penetrate into the transmission case body is arranged at one side of the transmission case body connected with the transmission case body, a supporting seat for supporting the two shafts is arranged in the speed change port, an oil storage cavity is formed at the position of the speed changing port below the supporting seat, an oil drainage hole communicated with the outside is formed at the bottom of the oil storage cavity, and a plug is connected to the oil drainage hole and is a magnetic plug or a magnet is arranged at one end of the plug, which faces the oil storage cavity.

2. The transmission case-transmission case coupling structure according to claim 1, wherein the plug is screwed to the drain hole.

3. The connecting structure of a transmission case and a gearbox according to claim 1, wherein the input gear and/or the output gear are integrally connected with gear shafts which are sleeved on the corresponding shafts, and support bearings are arranged between the gear shafts and the corresponding case bodies.

4. The connecting structure of a transmission case and a gearbox according to claim 1, wherein the supporting seat is provided with a through hole for the two shafts to pass through, the two shafts are sleeved with spline sleeves in transmission connection with the two shafts, the input gear sleeve is arranged on the spline sleeves and in transmission connection with the spline sleeves, the input gear is integrally connected with a gear shaft sleeved on the spline sleeves, and a supporting bearing is arranged between the gear shaft and the inner wall of the through hole.

5. The connecting structure of a transmission case and a transmission case according to claim 4, wherein the through-hole has two positioning rings disposed on a side wall thereof, the two supporting bearings are respectively an inner bearing and an outer bearing disposed on a side of the inner bearing away from the input gear, the inner bearing and the outer bearing are disposed on two sides of the positioning rings and respectively abut against the positioning rings, and the gear shaft is further screwed with a pre-tightening nut for pressing the outer bearing and the inner bearing against the positioning rings.

6. The connecting structure of a transmission case and a gearbox according to claim 5, wherein a spacer sleeve fitted over the gear shaft is provided between the inner bearing and the outer bearing.

7. A transmission case and transmission case coupling structure according to claim 5 wherein the end of the shaft relatively close to the transmission case is threadedly attached with a lock nut that abuts against the spline housing.

8. A connecting structure between a transmission case and a transmission case according to any one of claims 1 to 7, wherein an oil passage hole for communicating the oil reservoir chamber with an inner chamber of the transmission case is formed in a side wall of the transmission case.

9. A connecting structure of a gearbox and a transmission case according to any one of claims 1 to 7, wherein a tapered roller bearing is sleeved at one end of the output shaft, an adjusting gasket abutting against the tapered roller bearing is arranged between the end of the output shaft provided with the tapered roller bearing and the inner side wall of the transmission case, an adjusting bolt abutting against one side of the adjusting gasket far away from the tapered roller bearing is spirally connected to the transmission case, and one end of the adjusting bolt far away from the adjusting gasket is positioned outside the transmission case.