CN103615518B - A kind of assembling apparatus for gear box of tractor twin shaft assembly and attach together method - Google Patents

Abstract

The invention belongs to the field of mechanical manufacturing, and relates to an assembly device and an assembly method for a tractor gearbox biaxial assembly. The assembly device of the present invention includes: a body assembly (9), two sets of guide assemblies (10), a positioning assembly (11), a lifting hook assembly (12) and a pre-installation assembly (13); in the body assembly (9 ), fixedly connected with a positioning assembly (11), two sets of guide assemblies (10) and a lifting hook assembly (12), forming a fixedly connected "assembly as a whole"; the assembly device and assembly method described in the present invention, When the two-shaft assembly is placed in the power shift gearbox housing, the meshing gears between the two-shaft assemblies can be in a normal meshing state, avoiding bumps on the meshing surfaces of the gears, and ensuring that the two-shaft assembly When falling together, the alignment is accurate, and the shaft end sealing ring is prevented from being damaged by cutting and scratching. In addition, the device has a novel structure, simple method, easy implementation, and has good use value.

Description

An assembly device and assembly method for tractor gearbox biaxial assembly

technical field

The invention belongs to the field of mechanical manufacturing, and relates to an assembly device and an assembly method for a tractor gearbox biaxial assembly.

Background technique

The gearbox is an important part of the tractor. At present, most domestic tractors still use mechanical shift gearboxes, also known as manual shift gearboxes, the structure and assembly method of the gearbox housing and transmission mechanism (gears, shafts, bearings, sleeves, keys, etc.). As shown in Figure 1.

As can be seen from Fig. 1, in the inner chamber 1a of the mechanical shift housing (referring to the mechanical shift gearbox housing) 1, there is a transmission structure—the output shaft assembly and the input shaft assembly; there is an upper opening on the top of the mechanical transmission housing 1 1b; the front side of the machine casing 1 is provided with the flange 2c installation hole for the output shaft and the front bearing 3b' installation hole on the input shaft; the rear side of the machine casing 1 is provided with the output shaft rear bearing 2b" installation hole and the input shaft Upper rear bearing 3b” mounting holes.

The assembly process of the output shaft assembly and the input shaft assembly in the machine casing 1 is roughly as follows:

1. Installation of output shaft assembly. First, place the output shaft flange 2c and the output shaft front bearing 2b' on the front side of the machine case 1; secondly, insert the output shaft 2 from the outer cavity 1c of the machine case 1 and through the bearing installation hole into the machine case At the same time, during the penetration process, by means of the upper opening 1b, the rear bearing 2b" on the output shaft, the gear on the output shaft and the installation components 2a of key sets are installed on the output shaft 2 one by one in order ; Subsequently, screw in the lock nut 2d and lock it.

2. Installation of input shaft assembly. Firstly, place the rear bearing 3b” on the input shaft on the rear side of the machine case 1; secondly, insert the input shaft 3 from the bearing installation hole on the front side of the machine case 1 into the inner chamber 1a of the machine case 1, same as above , in the process of penetration, with the help of the upper opening 1b, install the gears and key sets 3a on the input shaft on the input shaft 3 one by one in order; finally, install the front bearing 3b' on the input shaft and install it on the The front bearing cover 3c, so far, completes the entire assembly process of the transmission mechanism in the mechanical variable housing 1 .

With the development of science and technology, power shift gearboxes have begun to be applied on tractors. The power shift gearbox refers to the use of electric control hydraulic valves to timely manipulate the hydraulic shift clutch without interrupting the power transmission, so as to realize the gear shift and direction change of the gearbox. This gearbox represents a development direction of today's tractor products.

It should be noted that, as far as the gearbox housing and its transmission mechanism are concerned, the power shift gearbox is obviously different from the mechanical shift gearbox, so the transmission mechanism (gears, shafts, bearings, sleeves, keys, etc.) Parts) are also different in the assembly process in the gearbox housing, that is, the original assembly method is no longer applicable to the new assembly process requirements.

Below, the case of the power shift gearbox and the transmission mechanism are described with an embodiment, as follows:

1. The condition of the gearbox housing. As can be seen from Figures 2 and 3, the dynamic housing (referring to the power shift gearbox housing) 4 is provided with a front flange surface 4a of the dynamic housing, a flange surface 4d of the rear end of the dynamic housing, and a housing Internal cavity 4c; on the front flange surface 4a of the dynamic housing, there are front-end surface holes δ0 and two pin holes 4b on the front flange surface, and the distance between the two pin holes is L2; on the partition plate of the internal cavity 4c of the housing , the installation hole δ1 for the first shaft and the installation hole δ2 for the second shaft are set, and the distance between the installation holes of the first shaft and the second shaft is L1. In addition, the drop size of the end surface of the bearing hole for the lower end of the first shaft assembly and the second shaft assembly is H1 .

2. The condition of the transmission mechanism. Known from Fig. 4, the transmission mechanism is made up of a shaft assembly 5 and a two shaft assembly 6. On the shaft assembly 5, there are: a shaft 5a, a bearing 5b' for the upper end of the shaft, a bearing 5b" for the lower end of the shaft, a gear and key set assembly 5c on the shaft, and a clutch assembly for the shaft 5d, spare parts such as seal ring 5e for the first end of the first shaft; on the second shaft assembly 6, there are: the second shaft 6a, the bearing 6b' for the upper end of the second shaft, the bearing 6b "for the lower end of the second shaft", the upper gear of the second shaft and Set of key installation components 6c, clutch assembly 6d for the second shaft, sealing ring 6e for the head end of the second shaft and other components; in addition, the distance between the first shaft assembly and the second shaft assembly is L1'; the first shaft assembly The end surface drop size of the bearing for the lower end of the second shaft assembly is H1', that is, the end face drop size of the bearing 5b" for the lower end of the first shaft and the bearing 6b" for the lower end of the second shaft is H1'; moreover, from Figure 4 and combined with Figure 5, As shown in FIG. 6 , on the first shaft end 5a, a plurality of sealing rings 5e for the first shaft end are provided, and on the second shaft first end 6a, a plurality of sealing rings 6e for the second shaft end are also arranged.

From the situation introduced in Figure 2, Figure 3, Figure 4, Figure 5, and Figure 6 above, the assembly of the transmission mechanism (one shaft assembly 5, two shaft assembly 6) in the dynamic housing 4 will inevitably occur The following situations:

1. On the dynamic casing 4, as far as the casing inner cavity 4c is concerned, there are no other openings except for the three through-hole openings of the front face δ0, the first-axis installation hole δ1, and the second-axis installation hole δ2. The opening (especially the side opening) is used to facilitate the installation of the first shaft assembly 5 and the second shaft assembly 6 (entering from the opening), which makes the first shaft assembly 5 and the second shaft assembly 6 in the dynamic housing 4 The assembly of the two-axis assembly 6 is no longer the same as the output shaft assembly and input shaft assembly in the aforementioned machine variable housing 1, by means of the side opening (upper opening 1b), the method of passing through and assembling parts one by one in order To achieve the final assembly in place.

2. Due to the design requirements of the product structure, the top view layout of the front face δ0, the first-axis installation hole δ1, and the second-axis installation hole δ2 is obviously offset (as shown in Figure 2), which makes the transmission mechanism (one-axis assembly 5 , Two-axis assembly 6) Difficulties in implementing placement assembly in the inner cavity 4c of the housing, manifested in:

a. If the first shaft assembly 5 is put into the housing cavity 4c of the dynamic casing 4, and the head end 5a' of the first shaft is located in the first shaft installation hole δ1, at this time, if the second shaft assembly 6 is placed , not only the gear 6c' for the lower end of the second shaft will interfere with the front face δ0 on the dynamic casing 4, but also interfere with the gear 5c for the upper end of the first shaft assembly 5, which will eventually lead to the 6 cannot be assembled in place.

b. If first put the two-axis assembly 6 into the housing cavity 4c of the dynamic housing 4, and the head end 6a' of the two-axis is located in the second-axis installation hole δ2, at this time, if another axis assembly 5 is placed , then, the gear 5d' of the one-shaft clutch assembly on the one-shaft clutch assembly 5d will interfere with the two-shaft clutch assembly 6d, and finally the one-shaft assembly 5 cannot be assembled in place.

Based on the above situation, for the implementation of "placement assembly" of the transmission mechanism in the dynamic housing 4, the idea is as follows: firstly, the two shafts (one shaft assembly 5 and two shaft assembly 6) complete their respective assembly in advance. Assembled, and the gears meshing with each other are in the normal meshing state, that is, the two shafts are combined together, and then they enter the inner cavity 4c of the housing through the front end face δ0 on the dynamic housing 4, and make the head end 5a of the first shaft ' and the first end 6a' of the second shaft are respectively placed in the first shaft installation hole δ1 and the second shaft installation hole δ2, and then the purpose of placement assembly is achieved.

At present, the biaxial assembly method adopted according to this idea is shown in Figure 7.

It can be known from Fig. 7 that the first-axis assembly 5 and the second-axis assembly 6 have been assembled in advance on the outside of the dynamic casing 4, and under the control of the operator, the two are combined with the sling 7 ( Bundled) together, the combined biaxial assembly is hoisted to the top of the dynamic casing 4 through the hook 8 on the external lifting device (such as a crane), and then slowly falls into the casing through the front face δ0 In the body cavity 4c, and in the case of manual repeated alignment and correction of the falling direction, the first axis head end 5a' and the second axis head end 6a' are respectively placed in the first axis installation hole δ1 and the second axis installation hole δ2, and then Take the next step and complete its entire placement assembly.

Although this method is feasible, it also has the following problems that are difficult to solve:

1. The meshing state of the gears on the first shaft assembly 5 and the second shaft assembly 6 is not good, if they are often in a skewed and disengaged state, the distance L1' between the first shaft assembly and the second shaft assembly cannot be guaranteed, that is , L1' is too different from the dimension L1 of the first-axis and second-axis installation holes, which makes it difficult for the first-axis head end 5a' and the second-axis head end 6a' to fall into the first-axis installation hole δ1 and the second-axis installation during the falling process. In the hole δ2, it is necessary to manually straighten and repeatedly align and correct, which is not only time-consuming and labor-intensive, but also inefficient.

2. Since the above-mentioned meshing gears are often in a skewed and disengaged state, and because the total weights of the first shaft assembly 5 and the second shaft assembly 6 are different, the drop size of the bearing end faces of the lower end of the first shaft assembly and the second shaft assembly H1' cannot be guaranteed, that is, the difference between H1' and the end face drop size H1 of the bearing holes of the first-axis assembly and the second-axis assembly is too large. 'It is difficult to fall into the first-axis mounting hole δ1 and the second-axis mounting hole δ2. In addition, this situation also makes the meshing surface of the gear prone to bumps and flaws, which affects the quality of subsequent products.

3. During the falling process of the combined binding (one-axis assembly 5 and two-axis assembly 6), due to the lack of falling guidance and the fact that the operator cannot observe the falling situation from the surrounding sides of the dynamic casing 4, timely guide and correct it Therefore, even if the above-mentioned problems do not exist, the first shaft head 5a' and the second shaft head 6a' fall into the first shaft installation hole δ1 and the second shaft installation hole δ2, and it will be difficult to fall and align.

4. It is precisely because of the above-mentioned first-axis head end 5a' and second-axis head end 6a' that occur when falling into the first-axis installation hole δ1 and the second-axis installation hole δ2, the problem of falling and alignment is difficult, and then a chain reaction occurs, making The seal ring 5e for the head end of the first shaft and the seal ring 6e for the head end of the second shaft are often scratched and damaged by the corner β1 on the mounting hole of the first shaft and the corner β2 on the mounting hole of the second shaft, resulting in poor sealing and occurrence of The situation of oil leakage has seriously affected the quality of subsequent products.

In view of this, how to quickly and safely implement the placement assembly of the transmission mechanism (the first shaft assembly 5 and the second shaft assembly 6) in the dynamic housing 4 to solve the difficulties of reliable meshing and falling alignment of the upper gears of the double shaft assembly It has become an urgent problem to be solved to ensure that the gear meshing surface is not scratched and the shaft end seal ring is not damaged by cutting, saving time and effort, improving efficiency and meeting the requirements.

Contents of the invention

In order to solve the above problems, the purpose of the present invention is to provide a combination device and method for the biaxial assembly of the tractor gearbox. When the biaxial assembly is placed in the power shift gearbox housing, It can make the meshing gears between the double-shaft assemblies in a normal meshing state, avoid bumps and flaws on the meshing surfaces of the gears, and ensure accurate alignment when the double-shaft assemblies fall together, avoiding the shaft end seal ring from being scratched and damaged. In addition, the device is novel in structure, simple in method, fast, safe and reliable, time-saving, labor-saving, efficient, easy to implement, and has good use value.

In order to realize the above-mentioned purpose of the invention, the present invention adopts the following technical solutions:

A combination device for a tractor gearbox biaxial assembly, including: a body assembly, two sets of guide assemblies, a positioning assembly, a lifting hook assembly and a pre-installation assembly; wherein, the body assembly is fixedly connected with a positioning assembly 1. Two sets of guide components and lifting hook components, that is, forming a "components are fixedly connected as a whole".

A combination device for a tractor gearbox biaxial assembly, the body assembly includes: a base, a long sleeve and a short sleeve; on the base on the left side of the short sleeve, a bush is installed on the left hole, the left mounting hole of the guide sleeve, and the screw hole on the base; on the base on the right side of the long sleeve, there are set the right mounting hole of the guide sleeve, the right mounting hole of the bushing, and the screw hole on the base; On the inner hole of the long shaft sleeve, the upper screw hole of the long shaft sleeve, the inner hole of the short shaft sleeve, and the upper screw hole of the short shaft sleeve, the distance between the long shaft sleeve and the short shaft sleeve is equal to that on the dynamic housing The distance between the mounting holes of the first axis and the second axis; in addition, on the base, there are also mounting holes for lifting hook components.

A combination device for a tractor gearbox biaxial assembly, the two sets of guide assemblies, wherein each set of guide assemblies includes: a short guide post, a positioning plate, a positioning round pin, a fastening bolt, a return spring, Spring stopper, long guide post, anti-loosening nut, guide bush with seat and bushing; the guide bush with seat in the two sets of guide assemblies is fixedly connected to the left mounting hole of the guide bush on the base body by fastening bolts, and the right guide bush In the installation hole; the bushings in the two sets of guide components are respectively interfering with the left mounting hole of the bushing and the right mounting hole of the bushing on the base body; one end of the two short guide posts penetrates into the inner holes of the two bushings and can implement sliding operation, and the other end is fixedly connected to the plane of the two positioning plates by fastening bolts; the cylindrical surfaces of the two long guide posts are respectively equipped with a return spring and a spring stopper, and are inserted into the belt After the seat guide sleeve, its threaded end is screwed into the anti-loosening nut. In addition, the other end of the two long guide posts is a flange end, which is fixedly connected to the plane of the positioning plate of the two positioning plates through fastening bolts; The positioning round pins are respectively placed in the holes on the lower plane of the positioning plate of the two positioning plates, and are on the same axis as the long guide post. In addition, the distance between the two positioning round pins is equal to the distance between the two pin holes on the dynamic housing. size.

A combination device for tractor gearbox biaxial assembly, the positioning assembly includes: two flange seats, two star-shaped handles, two handle pins, flange seat screws, positioning The short screw, the positioning ring for the first axis, the positioning ring for the second axis and the long positioning screw; among them, the two flange seats are fixedly connected to the upper end surface of the long shaft sleeve and the upper end surface of the short shaft sleeve through the flange seat; the positioning short One end of the screw is fixedly connected with the star handle through the pin shaft of the handle, and the other end of the positioning short screw is a threaded end; one end of the long positioning screw is fixedly connected with the star handle through the pin shaft of the handle, and the other end of the positioning long screw is the threaded end; the locating ring for the first axis and the locating ring for the second axis are respectively interferingly fixedly connected to the inner hole surface of the lower end of the long shaft sleeve and the inner hole surface of the lower end of the short shaft sleeve.

A combination device for a tractor gearbox biaxial assembly, the lifting hook assembly includes: nuts, lifting screws, lifting lugs and handles; the lower end of the lifting screw is fixedly connected to the base body through the nut. On the installation hole of the transport hook assembly.

A combination device for tractor gearbox double-shaft assembly, the pre-installed assembly includes: a base, a """ type 1# straight guide rail, two "L" type sliders, and a sliding support with holes , fixed support with holes, hexagon socket head cap screws, joystick, "『" type 2# straight guide rail, sealing ring sheath for the second axis and sealing ring sheath for the first axis; among them, the sliding support with holes except the inner The hole is equipped with a sealing ring sheath for the second shaft, and the sliding bearing with the hole is connected to the two "L"-shaped sliders through the hexagon socket head screw; the "『" type 1# straight guide rail is connected to the "『" Type 2# straight guide rails are fixedly connected to the base by hexagon socket head screws, and the two "『"-shaped upper protrusions on it are respectively embedded in the grooves of the two "L"-shaped sliders. And by pulling the control handle, the sliding bearing with a hole can slide in the forward direction or the backward direction; the fixed bearing with a hole is equipped with a shaft seal ring sheath in the inner hole, and the belt with a hexagon socket head screw is also used. The fixed support with holes is fixedly connected to the base. In addition, the distance between the fixed support with holes and the upper end surface of the sliding support with holes is equal to the drop size of the bearing holes for the lower ends of the first-axis assembly and the second-axis assembly; the second-axis seal The ring sheath and the sealing ring sheath for a shaft are all made of nylon material, and are respectively interferingly fixed in the respective inner holes of the sliding support with holes and the fixed support with holes.

A combined assembly method for a tractor gearbox biaxial assembly, the steps are as follows:

1) Pre-installation of a shaft assembly: that is, take a shaft assembly that has been assembled, and insert the first end of the first shaft and the upper end of the first shaft with a sealing ring into the first shaft of the pre-installed assembly In the inner hole of the sheath with a sealing ring, and make the end face of the outer ring of the bearing at the lower end of a shaft fall on the upper end face of the fixed support with holes;

2) Pull the sliding bearing with holes: that is, through the control handle, the sliding bearing with holes is urged to slide backward on the "『" type 1# straight guide rail and the "『" type 2# straight guide rail in the backward direction to expand the belt hole. The distance between the sliding support and the fixed support with holes is greater than the axial distance between the first shaft assembly and the second shaft assembly;

3) Pre-installed two-axis assembly: that is, take a two-axis assembly that has been assembled, and insert the two-axis head and the upper two-axis head with the seal ring into the two-axis assembly in the pre-installed assembly. Use the sealing ring to sheath the inner hole, and make the end face of the outer ring of the bearing for the lower end of the two shafts fall on the upper end face of the fixed support with holes;

4) Push the sliding bearing with holes, that is, through the operating handle, the sliding bearing with holes and the two-axis assembly pre-installed on it are pushed together, and the "『" type 1# straight guide rail and the "『" type 2 #Slide forward along the forward direction on the straight guide rail, reduce the distance between the sliding support with holes and the fixed support with holes, making it equal to the axial distance between the first-axis assembly and the second-axis assembly;

5) Positioning of positioning components: that is, first remove the bearing outer ring for the upper end of the first shaft and the outer bearing ring for the upper end of the second shaft, and then connect the body assembly, positioning assembly, two sets of guide assemblies and lifting hook assemblies to form The locating ring for the first shaft and the locating ring for the second shaft on the positioning assembly in the "components are fixedly connected as a whole" are respectively set on the rolling cones of the bearing for the upper end of the first shaft and the upper end of the second shaft from which the outer ring of the bearing has been removed. Finally, screw the short positioning screw and the long positioning screw on the positioning component into the screw hole at the end of the first axis and the screw hole at the end of the second axis respectively, and perform tightening and positioning;

6) Hoist and place the outer ring at the lower end: that is, use the hook on the external hoisting device to hang the lifting lugs on the lifting hook assembly in the aforementioned "components are fixedly connected to the whole", and the "components are fixedly connected to the whole" and the positioned and tightened first-axis assembly and second-axis assembly are hoisted and transported to the top of the flange surface of the front end of the dynamic variable housing, and then the lower end of the first shaft that falls on the upper end surface of the fixed support with holes is used The outer ring of the bearing and the lower end of the second shaft on the upper end surface of the sliding support with holes are picked up by the outer ring of the bearing, and put into the first-axis installation hole and the second-axis installation hole in the inner cavity of the housing of the dynamic housing;

7) Avoid interference falling: that is, centering on the front face of the dynamic casing, drop the aforementioned "components fixedly connected as a whole" and the first-axis assembly and the second-axis assembly that have been positioned and screwed on it until they avoid each other. up to the point of interference;

8) The guide falls in place: that is, after implementing step 7), align the two positioning round pins with the distance between the positioning round pins on the two guide components in the aforementioned "components fixedly connected to the whole" with the two positioning round pins of the dynamic housing. After the two pin holes on the front flange surface of the two pin hole spacing dimensions, continue to fall until they are inserted into the pin holes on the front flange surface. Then, the first shaft assembly and the second shaft assembly continue to fall under the condition of guidance until The head end of the first shaft, the sealing ring for the first end of the first shaft, the first end of the second shaft, and the sealing ring for the first end of the second shaft respectively enter the installation hole of the first shaft and the installation hole of the second shaft, and the bearing for the lower end of the first shaft and the lower end of the second shaft The rolling cone of the bearing falls into the outer ring of the bearing for the lower end of the first shaft and the outer ring of the bearing for the lower end of the second shaft that have been placed in the installation hole of the first shaft and the second shaft respectively, so far it shows that it has fallen into place;

9) Uninstall and install the upper outer ring: that is, unscrew the short positioning screw and the long positioning screw on the positioning component of the "components fixedly connected to the whole", and disengage the screw hole at the end of the first axis and the screw hole at the end of the second axis, and At the same time, under the reset action of the return spring, the short guide post, long guide post and anti-loosening nut return to their original positions. The bearing outer ring and the bearing outer ring for the upper end of the second shaft are placed on the rolling cones of the bearing for the upper end of the first shaft and the bearing for the upper end of the second shaft that have been placed in the inner cavity of the housing;

10) Complete the final installation: that is, first install two pins in the pin holes of the two front flange faces of the front flange face of the dynamic housing, then install the front cover of the gearbox, and fasten it with fasteners, so far It shows that in the dynamic housing of the power shift gearbox, the placement assembly work of the one-axis assembly and the two-axis assembly has been completed.

Due to the adoption of the technical solution described above, the present invention can achieve the following beneficial effects:

1. According to the present invention, a combination device for tractor gearbox double-shaft assembly, since the pre-installed components and positioning components are set in the device, the distance between the first shaft assembly and the second shaft assembly can be adjusted. The dimension L1' and the dimension L1 of the installation hole distance between the first shaft and the second shaft can be kept consistent during installation, and the drop dimension H1' of the bearing end faces of the lower end of the first shaft assembly and the second shaft assembly can be consistent with the first shaft assembly and the second shaft assembly. The drop size H1 of the end face of the bearing hole remains consistent. Therefore, when the double-shaft assembly is placed in the gearbox housing and falls, it can not only effectively ensure that the gears to be meshed are in a good meshing state, but also avoid the output of the meshing surface. It was flawed, and it also laid a good foundation for the subsequent accurate alignment and whereabouts;

2. According to the present invention, a combination device for tractor gearbox biaxial assembly, since the guide assembly is set in the device, it can effectively solve the problem of placing the biaxial assembly in the gearbox housing. The problem of accurate alignment and falling when falling, thus effectively avoiding the cutting and scratching damage of the shaft end sealing ring, and the assembly process is fast, safe and reliable, saving time, labor and efficiency;

3. A combination device and method for tractor gearbox biaxial assembly described in the present invention has a novel structure, simple method, easy implementation, and good use value.

Description of drawings

Figure 1 is a schematic diagram of a mechanical shift gearbox assembly;

Fig. 2 is a schematic diagram of a tractor power shift gearbox housing;

Fig. 3 is the A-A view of Fig. 2;

Fig. 4 is a combined schematic diagram of the first and second shaft assemblies in the power shift gearbox;

Fig. 5 is a partial enlarged view of I in Fig. 4;

Figure 6 is a partial enlarged view of II in Figure 4;

Figure 7 is a schematic diagram of the assembly of the original dynamic housing and the first and second shaft assemblies;

Fig. 8 is one of the structural schematic diagrams of a biaxial assembly assembly device for a tractor gearbox according to the present invention;

Fig. 9 is the second structural schematic diagram of a biaxial assembly assembly device for tractor gearbox according to the present invention;

Figure 10 is a schematic structural diagram of the body assembly;

Fig. 11 is the B-B view of Fig. 10;

Figure 12 is a schematic structural view of the guide assembly;

Fig. 13 is the C-C view of Fig. 12;

Figure 14 is a schematic structural diagram of the positioning assembly;

Fig. 15 is a structural schematic diagram of the lifting hook assembly;

Fig. 16 is the K direction view of Fig. 15;

Figure 17 is a schematic structural diagram of pre-installed components;

Fig. 18 is the D-D view of Fig. 17;

Fig. 19 is the E-E view of Fig. 17;

Figure 20 is one of the working schematic diagrams of the combined assembly of the tractor gearbox biaxial assembly;

Fig. 21 is the second schematic diagram of the assembly of the biaxial assembly of the tractor gearbox;

Fig. 22 is the third schematic diagram of the assembly of the biaxial assembly of the tractor gearbox;

Fig. 23 is the fourth schematic diagram of the assembly of the biaxial assembly of the tractor gearbox;

Fig. 24 is the fifth schematic diagram of the assembly of the biaxial assembly of the tractor gearbox.

In the picture:

1. Mechanical variable housing (referring to the mechanical shift gearbox housing); 1a, inner chamber; 1b, upper opening; 1c, outer chamber; 2. Output shaft; 2a, gear and key set installation components on the output shaft; 2b', the front bearing on the output shaft; 2b", the rear bearing on the output shaft; 2c, the flange for the output shaft; 2d, the lock nut; 3, the input shaft; 3a, the gear and key set installation components on the input shaft; ', the front bearing on the input shaft; 3b", the rear bearing on the input shaft; 3c, the front bearing cover;

4. Dynamic housing (refers to power shift gearbox housing); 4a, front flange surface of dynamic housing; 4b, pin hole on front flange surface; 4c, inner chamber of housing; 4d, dynamic housing Rear end flange surface; 4e, second shaft mounting hole; 4f, first shaft installation hole; 5, first shaft assembly; 5a, first shaft; 5a', first shaft head end; 5a", first shaft tail end screw hole; 5b', a bearing for the upper end of a shaft; 5b'1, a bearing outer ring for an upper end of a shaft; 5b", a bearing for a lower end of a shaft; 5b"1, a bearing outer ring for a lower end of a shaft; 5c, a gear and a sleeve on a shaft Key installation components; 5c', gear for the upper end of a shaft; 5d, clutch assembly for a shaft; 5d', middle gear for a shaft clutch assembly; 5e, sealing ring for the head end of a shaft; 6, second shaft assembly ;6a, the second shaft; 6a', the first end of the second shaft; 6a", the screw hole at the tail end of the second shaft; 6b', the bearing for the upper end of the second shaft; 6b'1, the bearing outer ring for the upper end of the second shaft; 6b", the second shaft Bearings for the lower end; 6b"1. Outer ring of the bearing for the lower end of the second shaft; 6c. Gear and key installation components for the upper end of the second shaft; 6c'. Gear for the lower end of the second shaft; 6d. Clutch assembly for the upper end of the second shaft; 6d'. The middle gear of the two-axis clutch assembly; 6e, the sealing ring for the head end of the two-axis; 7, the lifting rope; 8, the hook;

9. Body component; 10. Guide component; 11. Positioning component; 12. Lifting hook component; 13. Pre-installed component; 14. Base; 14', screw hole on base; 15b, the upper end surface of the long shaft sleeve; 15', the upper screw hole of the long shaft sleeve; 16, the short shaft sleeve; 16a, the inner hole surface of the lower end of the short shaft sleeve; 16b, the upper end surface of the short shaft sleeve; 16' 1, the screw hole on the short shaft sleeve; 17, the short guide post; 18, the positioning plate; 18a, the plane on the positioning plate; 18b, the lower plane of the positioning plate; 19, the positioning round pin; 20, the fastening bolt; 21, the return spring; 22. Spring stopper; 23. Long guide post; 24. Anti-loosening nut; 25. Guide sleeve with seat; 26. Bushing; 27. Flange seat; 28. Star handle; 29. Pin shaft for handle; 30 , screw for flange seat; 31, short positioning screw; 32, positioning ring for one axis; 33, positioning ring for second axis; 34, long positioning screw; 35, nut; 36, lifting screw; 36a, lower end of screw; 36b , screw upper end; 37, lifting lug; 38, handle; 39, base; 40, "『" type 1# straight guide rail; 41, "L" type slider; 42, sliding support with holes; 42a, with holes Upper end surface of sliding support; 43. Fixed support with holes; 43a. Upper end surface of fixed support with holes; 44. Hexagon socket head cap screw; 45. Joy handle; 46. "『" type 2# straight guide rail; 47. Sealing ring sheath for the second shaft; 48. Sealing ring sheath for the first shaft; 49. Gearbox front cover; 50. Pin.

In another picture:

δ0, the front face; δ1, the mounting hole of the first axis; δ2, the mounting hole of the second axis; δ4, the left mounting hole of the bush; δ5, the left mounting hole of the guide sleeve; ;δ8, the right mounting hole of the guide bush; δ9, the right mounting hole of the bushing; δ10, the mounting hole of the lifting hook assembly; H1, the drop size of the bearing hole at the lower end of the first shaft assembly and the second shaft assembly; β1, the first shaft installation The upper corner of the hole; β2, the upper corner of the second-axis mounting hole; H1', the drop size of the bearing end faces of the first-axis assembly and the lower end of the second-axis assembly; H1", the distance between the upper end of the fixed support with holes and the sliding support with holes ; L1, the distance between the first shaft and the second shaft; L1', the distance between the first shaft assembly and the second shaft assembly; L1", the distance between the long bush and the short bush; L2, the distance between the two pin holes; L2', the distance between two positioning round pins; γ', the first unilateral gap (refers to the radial unilateral gap between the journal at the lower end of the seal ring of the first shaft assembly and the inner hole of the sheath of the first shaft seal ring ); γ”, the second unilateral gap (refers to the radial unilateral gap between the journal at the lower end seal ring of the two-axis assembly and the inner hole of the two-axis seal ring sheath); Q, the direction of retreat; P ,Forward direction.

detailed description

The present invention can be explained in more detail through the following examples. The present invention is not limited to the following examples. The purpose of disclosing the present invention is to protect all changes and improvements within the scope of the present invention.

From Fig. 8 and Fig. 9, it is known that a combination device for tractor gearbox biaxial assembly includes: body assembly 9, two sets of guide assemblies 10, positioning assembly 11, lifting hook assembly 12 and pre-installation assembly 13 ; Wherein, on the body component (9), there are fixedly connected a positioning component (11), two sets of guide components (10) and a lifting hook component (12), that is, forming a "components fixedly connected as a whole".

It is known from Fig. 10 and Fig. 11 that a combination device for a tractor gearbox biaxial assembly, the body assembly 9 includes: a base 14, a long shaft sleeve 15 and a short shaft sleeve 16; in the short shaft sleeve On the base 14 on the left side of 16, there are left mounting holes δ4 for bushings, left mounting holes δ5 for guide bushes, and screw holes 14' on the base, which are used for the installation of a set of guide assemblies 10 on the left side of body assembly 9; On the base 14 on the right side of the long shaft sleeve 15, there are set the right installation hole δ8 of the guide sleeve, the right installation hole δ9 of the bushing and the screw hole 14' on the base body, which are used for another set of guide assembly 10 on the right side of the body assembly 9. installation; on the long sleeve 15 and the short sleeve 16, there are respectively provided with the inner hole δ6 of the long sleeve, the upper screw hole 15' of the long sleeve, the inner hole δ7 of the short sleeve and the upper screw hole 16' of the short sleeve, It is used for the installation of the positioning assembly 11, wherein the distance dimension L1" between the long shaft sleeve and the short shaft sleeve is equal to the dimension L1 of the installation hole distance between the first axis and the second axis on the dynamic housing 4; in addition, on the base 14, A lifting hook assembly installation hole δ10 is also provided for the installation of the lifting hook assembly 12 .

From Fig. 12 and Fig. 13, it is known that a combination device for a tractor gearbox biaxial assembly, the two sets of guide assemblies 10, wherein each set of guide assemblies includes: a short guide post 17, a positioning plate 18, Positioning round pin 19, fastening bolt 20, return spring 21, spring stopper 22, long guide post 23, anti-loosening nut 24, guide sleeve with seat 25 and bushing 26; guide sleeve with seat 25 in the two sets of guide assemblies They are fixedly connected to the left mounting hole δ5 of the guide sleeve and the right mounting hole δ8 of the guide sleeve on the base body 14 through fastening bolts 20 respectively; The right mounting hole δ9 implements interference and fixed connection; one end of the two short guide posts 17 penetrates into the inner holes of the two bushings 26 and can perform sliding operation, and the other end is fixedly connected to the two positioning plates 18 by fastening bolts 20 on the plane 18a on the positioning plate; the cylindrical surfaces of the two long guide pillars 23 are respectively fitted with return springs 21 and spring stoppers 22, and after penetrating the guide sleeve 25 with seat, its threaded end is screwed into the anti-loosening nut 24 , In addition, the other ends of the two long guide posts 23 are flange ends, which are fixedly connected to the planes 18a on the positioning plates of the two positioning plates 18 through the fastening bolts 20; the two positioning round pins 19 are respectively placed on the two The positioning plate 18 is located in the hole of the lower plane 18b of the positioning plate, and is on the same axis as the long guide post 23. In addition, the distance between the two positioning round pins L2’ is equal to the distance L2 between the two pin holes on the dynamic housing 4. .

It is known from Fig. 14 that a combination device for tractor gearbox biaxial assembly, the positioning assembly 11 includes: two flange seats 27, two star handles 28, two handle pins 29. Screw 30 for flange seat, short positioning screw 31, positioning ring 32 for one axis, positioning ring 33 for second axis and long positioning screw 34; among them, two flange seats 27 are fixedly connected by screws 30 for flange seat On the upper end face 15b of the long shaft sleeve and the upper end face 16b of the short shaft sleeve; one end of the positioning short screw rod 31 is fixedly connected with the star handle 28 through the handle pin 29, and the other end of the positioning short screw rod is a threaded end, which can be used for connecting with a The screw hole 5a at the tail end of the shaft assembly 5 is threaded; one end of the positioning long screw 34 is fixedly connected with the star handle 28 through the handle pin 29. Similarly, the other end of the positioning long screw is a threaded end. It can be used to implement threaded connection with the two-axis tail end screw hole 6a" on the two-axis assembly 6; the positioning ring 32 for the first axis and the positioning ring 33 for the second axis are respectively interfering and fixedly connected to the inner hole surface 15a of the lower end of the long shaft sleeve, On the inner hole surface 16a of the lower end of the short sleeve, it should be noted that the positioning ring 32 for the first shaft and the positioning ring 33 for the second shaft can be replaced by the outer rings of the bearings on the dual shaft assembly to be installed.

It is known from Fig. 15 and Fig. 16 that a combination device for a tractor gearbox biaxial assembly, the lifting hook assembly 12 includes: a nut 35, a lifting screw 36, a lifting lug 37 and a handle 38; The screw lower end 36a of the lifting screw 36 is fixedly connected to the mounting hole δ10 of the lifting hook assembly on the base 14 through a nut 35 .

From Fig. 17, Fig. 18 and Fig. 19, it is known that a combination device for tractor gearbox biaxial assembly, the pre-installed assembly 13 includes: base 39, """ type 1# straight guide rail 40, Two "L"-shaped sliders 41, sliding bearings with holes 42, fixed bearings with holes 43, hexagon socket head screws 44, joysticks 45, "『" type 2# straight guide rails 46, sealing rings for the second shaft A sheath 47 and a seal ring sheath 48 for one shaft; wherein, the sliding support 42 with a hole is equipped with a seal ring sheath 47 for two shafts in the inner hole, and the sliding support with a hole is also connected by a hexagon socket head cap screw 44 The seat 42 is fixedly connected with two "L"-shaped sliders 41; the "『" type 1# straight guide rail 40 and the "『" type 2# straight guide rail 46 are respectively fixedly connected to the base 39 through socket head cap screws 44, And the two "『"-shaped upper protrusions on it are respectively embedded in the grooves of the two "L"-shaped sliders 41, and the sliding support 42 with holes can be moved forward by pulling the operating handle 45. Sliding in the direction P or in the backward direction Q; the fixed support 43 with a hole is installed in the inner hole in addition to a shaft seal ring sheath 48, and the fixed support 43 with a hole is fixedly connected to the base 39 by a hexagon socket head cap screw 44 , In addition, the distance dimension H1” between the upper end surface of the fixed bearing with holes and the sliding bearing with holes is equal to the drop dimension H1 of the end faces of the bearing holes for the lower ends of the first-axis assembly and the second-axis assembly; it should be noted that the above-mentioned two-axis seal The ring sheath 47 and the sealing ring sheath 48 for a shaft are all made of nylon material, and are respectively interferingly fixedly connected in the respective inner holes of the sliding bearing with holes 42 and the fixed bearing with holes 43 .

In the following, an example will be given, and a method for assembling the biaxial assembly of the tractor gearbox will be described in detail by referring to Fig. 20, Fig. 21, Fig. 22, Fig. 23, and Fig. 24 in conjunction with Fig. 2, Fig. 3, and Fig. 4 .

The dynamic housing 4 used in the assembly of a power shift gearbox in an enterprise is shown in Figure 2 and Figure 3; the one-axis assembly 5 and the second-axis assembly 6 are used, as shown in Figure 4; the external lifting device used is 0.5 T Lifting equipment, the manufacturer is Gaobo (Tianjin) Lifting Equipment Co., Ltd.

In addition, it can be seen from the working schematic diagrams of Fig. 20, Fig. 21, Fig. 22, Fig. 23 and Fig. 24 that a kind of assembly device for tractor gearbox biaxial assembly according to the present invention has completed its production work and assembled In place, wherein, the body assembly 9, two sets of guide assemblies 10, the positioning assembly 11 and the lifting hook assembly 12 have been fixedly connected as a whole through fasteners, that is, "the components are fixedly connected as a whole"; in addition, the pre-installed assembly 13 The sealing ring sheath 48 for the first shaft and the sealing ring sheath 47 for the second shaft are all made of nylon material.

In this embodiment, a combined method for the biaxial assembly of the tractor gearbox, the steps are as follows:

1) Pre-installation of a shaft assembly 5: that is, take a shaft assembly 5 that has been assembled, insert the first shaft end 5a' and the sealing ring 5e on the first shaft end together for pre-installation In the inner hole of the sealing ring sheath 48 for a shaft in the assembly 13, and the end face of the bearing outer ring 5b"1 for the lower end of a shaft falls on the upper end face 43a of the fixed support with holes; it should be noted that, in During this process, since the first-axis assembly 5 adopts a "single-axis" open placement, it is convenient for alignment when falling. In addition, due to the protective effect of the nylon material of the first-axis sealing ring sheath 48 and the inside of the first-axis sealing ring sheath 48 The size of the hole is larger than the outer diameter of the first shaft end 5a', that is, there is a first unilateral gap γ', which not only facilitates its insertion, but also prevents the sealing ring 5e for the first shaft end from being scratched;

2) Pull the sliding bearing 42 with a hole: that is, through the operating handle 45, the sliding bearing 42 with a hole is urged to move backward along the direction Q on the "『" type 1# straight guide rail 40 and the "『" type 2# straight guide rail 46. Sliding, expanding the distance between the sliding bearing 42 with a hole and the fixed bearing 43 with a hole, making it larger than the axis spacing dimension L1' of the first-axis assembly and the second-axis assembly, the purpose is to prevent mutual interference, In order to facilitate the pre-installation of the two-axis assembly 6;

3) Pre-install the two-axis assembly 6: that is, take a two-axis assembly 6 that has been assembled, and insert the two-axis head end 6a' and the seal ring 6e on the two-axis head end together for pre-installation In the inner hole of the sealing ring sheath 47 for the two shafts in the assembly 13, the end face of the bearing outer ring 6b"1 for the lower end of the two shafts falls on the upper end face 42a of the fixed support with holes; as above, it should be noted that , in this process, since the two-axis assembly 6 is placed in a "single-axis" open type, it is convenient for alignment when falling, and because of the protective effect of the two-axis sealing ring sheath 47 nylon material and the two-axis sealing ring sheath 47 The size of the inner hole is larger than the outer diameter of the first end of the second shaft 6a', that is, there is a second unilateral gap γ", which not only facilitates its insertion, but also prevents the sealing ring 6e for the first end of the second shaft from being damaged by scratches ;

4) Push the perforated sliding support 42, that is, through the operating handle 45, the perforated sliding support 42 and the two-axis assembly 6 pre-installed on it are pushed together on the "『" type 1# straight guide rail 40, The "『" type 2# straight guide rail 46 slides forward along the forward direction P, reducing the distance between the sliding support 42 with holes and the fixed support 43 with holes, making it equal to the one-axis assembly and the two-axis assembly The shaft spacing dimension L1' is to ensure that the meshing gears between the first shaft assembly 5 and the second shaft assembly 6 are in a normal meshing state, so as to facilitate the positioning of the positioning component 11 in the next step;

5) Positioning assembly 11 positioning: that is, first remove the bearing outer ring 5b'1 for the upper end of the first shaft and the bearing outer ring 6b'1 for the upper end of the second shaft, and then place the main body assembly 9, positioning assembly 11, and two sets of guide assemblies 10 and the hoisting hook assembly 12 are fixedly connected to form a "component fixedly connected as a whole", and the positioning ring 32 for the first shaft and the positioning ring 33 for the second shaft on the positioning assembly 11 are respectively set on the upper end of the first shaft from which the outer ring of the bearing has been removed. Use the bearing 5b' and the rolling cone of the bearing 6b' for the upper end of the second shaft. Finally, screw the short positioning screw 31 and the long positioning screw 34 on the positioning assembly 11 into the screw hole 5a" at the end of the first shaft and the screw hole 5a" at the end of the second shaft respectively. In the end screw hole 6a", implement tightening and positioning, the purpose of which is to ensure the dimension L1 of the installation hole distance between the first shaft and the second shaft, and the second is to ensure the drop size H1' of the bearing end surface of the lower end of the first shaft assembly and the second shaft assembly , which is equivalent to the distance dimension H1” between the fixed support with holes on the pre-installed component 13 and the upper end surface of the sliding support with holes;

6) Hoist and install the lower outer ring: that is, use the hook 8 on the external hoisting device to hoist the lifting lug 37 on the hoisting hook assembly 12 in the aforementioned "component fixedly connected to the whole", and fix the "component "connected whole" and the positioned and tightened first-axis assembly 5 and second-axis assembly 6 are hoisted and transported to the top of the flange surface 4a at the front end of the dynamic housing, and then they will be placed on the upper end surface of the fixed support with holes The lower end of the first shaft on 43a is picked up by the bearing outer ring 5b"1, and the lower end of the second shaft on the upper end surface 42a of the sliding bearing with holes is picked up by the bearing outer ring 6b"1, and put into the housing cavity located in the dynamic housing 4 Inside the first-axis installation hole 4f and the second-axis installation hole 4e in 4c;

7) Avoid interference falling: that is, centering on the front face δ0 of the dynamic casing 4, drop the aforementioned "components fixedly connected as a whole" and the first-axis assembly 5 and the second-axis assembly 6 that have been positioned and screwed on it, Until the parts that interfere with each other are avoided; the reason is that the top view layout of the front-end face δ0 and the first-axis installation hole δ1 and the second-axis installation hole δ2 in the housing cavity 4c are offset. , the gear 6c' at the lower end of the two shafts interferes with the front face δ0;

8) The guide falls in place: that is, after implementing step 7), align the two positioning round pins 19 of the positioning round pin spacing dimension L2' on the two guiding components 10 in the aforementioned "components are fixedly connected to the whole", and align them with the moving pins. After changing the two pin holes 4b on the front flange surface of the housing 4 with the distance between the two pin holes L2, continue to drop until it is inserted into the pin holes 4b on the front flange surface. Then, the first shaft assembly 5 and the second shaft assembly 6 Continue to fall under the condition of guidance until the head end 5a' of the first shaft, the sealing ring 5e for the head end of the first shaft, the head end 6a' of the second shaft, and the sealing ring 6e for the head end of the second shaft respectively enter the first shaft installation hole δ1, the second In the shaft installation hole δ2, and the rolling cones of the bearing 5b" for the lower end of the first shaft and the bearing 6b" for the lower end of the second shaft respectively fall into the lower end of the first shaft previously placed in the first shaft installation hole 4f and the second shaft installation hole 4e Use the bearing outer ring 5b"1, and the bearing outer ring 6b"1 for the lower end of the second shaft, so far it shows that it has fallen into place;

9) Disassemble and install the upper outer ring: that is, unscrew the short positioning screw 31 and the long positioning screw 34 on the positioning component 11 of the aforementioned "components fixedly connected to the whole", and separate them from the screw holes 5a" at the end of the first shaft, and the second At the same time, under the reset action of the return spring 21, the short guide post 17, the long guide post 23 and the anti-loosening nut 24 return to their original positions. At this time, remove the "components fixedly connected to the whole" , and place the bearing outer ring 5b'1 for the upper end of the first shaft and the outer bearing ring 6b'1 for the upper end of the second shaft that were removed in step 5) into the bearing 5b' for the upper end of the first shaft that has been placed in the inner cavity 4c of the housing On the rolling cone of the bearing 6b' at the upper end of the two shafts;

10) Complete the final installation: that is, first install two pins 50 in the two front flange surface pin holes 4b of the front flange surface 4a of the dynamic housing, then install the front cover 49 of the gearbox, and fix it with fasteners. Tightening, so far shows that: in the dynamic housing 4 of the power shift gearbox, the placement assembly work of implementing the first shaft assembly 5 and the second shaft assembly 6 is all completed.

Further explanation: for the purpose of disclosing the present invention, the embodiments selected in the detailed description herein are considered suitable at present, but it should be noted that the present invention is intended to include all implementations belonging to the concept and the scope of the present invention All changes and improvements to the examples.

Claims (2)

1. A combination device for tractor gearbox double-shaft assembly, characterized in that: the combination device includes: a body component (9), two sets of guide components (10), a positioning component (11), Lifting hook assembly (12) and preinstalled assembly (13); wherein, on the body assembly (9), there are fixedly connected a positioning assembly (11), two sets of guide assemblies (10) and a lifting hook assembly (12), That is, to form a "integrated whole of components"; The body assembly (9) includes: a base (14), a long sleeve (15) and a short sleeve (16); on the base (14) on the left side of the short sleeve (16), a bushing The left mounting hole (δ4), the left mounting hole of the guide sleeve (δ5) and the screw hole (14’) on the substrate; on the substrate (14) on the right side of the long shaft sleeve (15), there is a right mounting hole of the guide sleeve (δ8 ), the right mounting hole of the bushing (δ9) and the screw hole (14') on the substrate; on the long bushing (15) and the short bushing (16), the inner hole of the long bushing (δ6), the long shaft Put on the screw hole (15'), the inner hole of the short shaft sleeve (δ7) and the screw hole on the short shaft sleeve (16'), where the distance dimension L1" between the long shaft sleeve and the short shaft sleeve is equal to that in the dynamic housing ( 4) The distance between the mounting holes of the first axis and the second axis is L1; in addition, on the base (14), there is also a mounting hole (δ10) for the lifting hook assembly; The two sets of guide assemblies (10), wherein each set of guide assemblies includes: a short guide post (17), a positioning plate (18), a positioning round pin (19), a fastening bolt (20), a return spring (21 ), spring stopper (22), long guide post (23), anti-loosening nut (24), guide bush with seat (25) and bushing (26); guide bush with seat (25) in the two sets of guide assemblies They are fixedly connected to the left installation hole (δ5) and the right installation hole (δ8) of the guide sleeve on the base respectively through fastening bolts (20); The left mounting hole (δ4) and the right mounting hole (δ9) of the bushing on the bushing are fixedly connected by interference; one end of the two short guide posts (17) penetrates into the inner holes of the two bushings (26) and can be Implement sliding operation, and the other end is fixedly connected to the plane (18a) of the positioning plate (18) of the two positioning plates (18) through the fastening bolt (20); the cylindrical surfaces of the two long guide posts (23) are respectively set with return springs (21), spring stopper (22), and after passing through the guide sleeve with seat (25), its threaded end is screwed into the anti-loosening nut (24). In addition, the other ends of the two long guide posts (23) are The flange end is fixedly connected to the plane (18a) of the positioning plate (18) of the two positioning plates (18) through fastening bolts (20); the two positioning round pins (19) are respectively placed on the two positioning plates (18) The hole on the lower plane (18b) of the positioning plate is on the same axis as the long guide post (23). In addition, the distance between the two positioning round pins (L2') is equal to the two positioning pins on the dynamic housing (4). Pin hole spacing dimension (L2); The positioning assembly (11) includes: two flange seats (27), two star handles (28), two handle pins (29), flange seat screws (30), positioning short Screw (31), locating ring (32) for the first axis, locating ring (33) for the second axis and long positioning screw (34); among them, the two flange seats (27) are fixed by screws (30) on the flange seats Connect on the upper end face of the long shaft sleeve (15b) and the upper end face of the short shaft sleeve (16b); one end of the positioning short screw (31) is fixedly connected with the star handle (28) through the handle pin (29), and the positioning short screw The other end of (31) is a threaded end; one end of the positioning long screw (34) is fixedly connected with the star handle (28) through the handle pin (29), similarly, the other end of the positioning long screw (34) is a threaded end The locating ring (32) for the first axis and the locating ring (33) for the second axis are respectively interference-fixed on the inner hole surface (15a) at the lower end of the long sleeve and the inner hole surface (16a) at the lower end of the short sleeve; The lifting hook assembly (12) includes: a nut (35), a lifting screw (36), a lifting lug (37) and a handle (38); the lower end (36a) of the lifting screw (36) passes through the nut (35 ) is fixedly connected to the mounting hole (δ10) of the lifting hook assembly on the base (14); the lifting lug (37) is fixedly connected to the screw upper end (36b) of the lifting screw (36) by means of a nut (35); The pre-installed assembly (13) includes: base (39), """ type 1# straight guide rail (40), two "L" type sliders (41), sliding support with holes (42), Fixed support with holes (43), hexagon socket head cap screws (44), control handle (45), "『" type 2# straight guide rail (46), sealing ring sheath for the second shaft (47), and the first shaft Use a sealing ring sheath (48); among them, the sliding bearing with a hole (42) is equipped with a sealing ring sheath (47) for the second shaft in the inner hole, and the hole with a hexagon socket head screw (44) The sliding support (42) is fixedly connected with two "L" type sliders (41); The screws (44) are fixedly connected to the base (39) respectively, and the two """-shaped upper raised parts are embedded in the grooves of the two "L"-shaped sliders (41) respectively, and can be Pull the control handle (45) to make the sliding support with a hole (42) slide in the forward or backward direction; the fixed support with a hole (43) is equipped with a shaft sealing ring sheath (48) in the inner hole , the fixed support with holes (43) is also fixedly connected to the base (39) by hexagon socket head cap screws (44). In addition, the distance between the fixed support with holes and the upper surface of the sliding support with holes (H1") It is equivalent to the drop size (H1) of the bearing hole for the lower end of the first shaft assembly and the second shaft assembly; the sealing ring sheath (47) for the second shaft and the sealing ring sheath (48) for the first shaft are made of nylon 66 material, And they are respectively interfering and firmly connected in the respective inner holes of the sliding support with holes (42) and the fixed support with holes (43). 2. A combined method for tractor gearbox biaxial assembly, characterized in that: the steps of the combined method are as follows: 1) Pre-install a shaft assembly (5): that is, take a shaft assembly (5) that has been assembled, make the first shaft end (5a') and the first shaft end on it seal The ring (5e) is inserted into the inner hole of the shaft sealing ring sheath (48) in the pre-installed assembly (13), and the end surface of the bearing outer ring (5b"1) for the lower end of the shaft falls on the hole On the upper end face (43a) of the fixed support; 2) Pull the sliding support with holes (42): that is, through the operating handle (45), the sliding support with holes (42) is pushed on the "『" type 1# straight guide rail (40), "『" type 2# straight Slide back on the guide rail (46) along the backward direction, expand the distance between the sliding support with holes (42) and the fixed support with holes (43), making it larger than the axial distance between the first-axis assembly and the second-axis assembly (L1'); 3) Pre-install the two-axis assembly (6): that is, take a two-axis assembly (6) that has been assembled, and make the two-axis head end (6a') and the two-axis head end on it seal Insert the ring (6e) into the inner hole of the two-axis sealing ring sheath (47) in the pre-installed assembly (13), and make the end surface of the bearing outer ring (6b"1) for the lower end of the two-axis fall on the hole On the upper end surface (42a) of the fixed support; 4) Push the perforated sliding support (42), that is, through the control handle (45), the perforated sliding support (42) and the pre-installed two-axis assembly (6) are pushed together, in the "『 "Type 1# straight guide rail (40) and "『" type 2# straight guide rail (46) slide forward along the forward direction to reduce the distance between the sliding support with holes (42) and the fixed support with holes (43) spacing, making it equal to the dimension of the shaft spacing between the first-axis assembly and the second-axis assembly (L1'); 5) Positioning assembly (11) positioning: that is, first remove the bearing outer ring (5b'1) for the upper end of the first shaft and the outer bearing ring (6b'1) for the upper end of the second shaft respectively, and then place the body assembly (9), Positioning component (11), two sets of guide components (10) and hoisting hook components (12) are fixedly connected to form the "components fixedly connected as a whole", and the positioning ring (32) for one axis on the positioning component (11), the two Use the locating ring (33) to respectively fit on the rolling cones of the bearing for the upper end of the first shaft (5b') and the bearing for the upper end of the second shaft (6b') from which the outer ring of the bearing has been removed. Finally, place the locating assembly (11) The short positioning screw (31) and the long positioning screw (34) on the top are screwed into the screw hole (5a") at the end of the first axis and the screw hole (6a") at the end of the second axis respectively, for tightening and positioning; 6) Lift and place the lower outer ring: that is, use the hook (8) on the external lifting device to hang the lifting lug (37) on the lifting hook component (12) in the aforementioned "components are fixedly connected to the whole" , and lift the "components fixedly connected to the whole" and the positioned and tightened one-axis assembly (5) and two-axis assembly (6), and move them to the top of the front flange surface (4a) of the dynamic housing, and then , place the bearing outer ring (5b"1) for the lower end of the first shaft on the upper end surface (43a) of the fixed support with holes, and the outer bearing outer ring for the lower end of the second shaft on the upper end surface (42a) of the sliding support with holes ( 6b"1) Take it up and put it into the first-axis installation hole (4f) and the second-axis installation hole (4e) in the inner cavity (4c) of the dynamic housing (4); 7) Avoid interference with falling: that is, centering on the front face (δ0) of the dynamic shell (4), drop the aforementioned "components fixedly connected to the whole" and the one-axis assembly (5) that has been positioned and screwed on it, Two-axis assembly (6), until avoiding the parts that interfere with each other; 8) The guide falls in place: that is, after step 7) is implemented, place the two positioning round pins ( 19), after aligning the two pin holes (4b) on the front flange surface of the distance between the two pin holes (L2) of the dynamic housing (4), continue to drop until it is inserted into the pin holes (4b) on the front flange surface , and then, the first shaft assembly (5) and the second shaft assembly (6) continue to fall under the condition of guidance, until the first shaft head (5a'), the seal ring for the first shaft head (5e) and the second shaft The first end (6a') and the sealing ring (6e) for the first end of the second shaft enter into the first shaft installation hole (δ1) and the second shaft installation hole (δ2) respectively, and the bearing (5b") for the lower end of the first shaft is connected to the second shaft The rolling cone of the lower end bearing (6b") falls into the first shaft lower end bearing outer ring (5b"1), the second shaft The lower end is placed on the bearing outer ring (6b"1), so far it shows that it has fallen in place; 9) Uninstall and install the upper outer ring: that is, unscrew the positioning short screw (31) and the positioning long screw (34) on the positioning component (11) in the aforementioned "components are fixedly connected to the whole", and separate them from the end of the first shaft Screw hole (5a"), screw hole (6a") at the end of the second axis, at the same time, under the reset action of the return spring (21), the short guide post (17), the long guide post (23) and the anti-loosening nut (24) Return to the original position. At this time, remove the "components fixedly connected to the whole", and respectively replace the bearing outer ring (5b'1) for the upper end of the first shaft and the outer bearing ring (6b'1) for the upper end of the second shaft that were removed in step 5). '1), placed on the rolling cones of the bearing (5b') for the upper end of the first shaft and the bearing (6b') for the upper end of the second shaft that have been placed in the inner cavity (4c) of the housing; 10) Complete the final installation: that is, first install two pins (50) in the pinholes on the two front flange faces of the front flange face (4a) of the dynamic housing, and then install the gearbox front cover (49), And fasten it with fasteners, so far it shows that in the dynamic housing (4) of the power shift gearbox, the placement assembly work of the first shaft assembly (5) and the second shaft assembly (6) has been completed .