CN218950783U

CN218950783U - Intermediate gear shaft hoisting tool for high-power methanol engine

Info

Publication number: CN218950783U
Application number: CN202223193877.6U
Authority: CN
Inventors: 赵俊; 龚洁; 高益多; 朱文霞
Original assignee: CSSC Marine Power Zhenjiang Co Ltd
Current assignee: CSSC Marine Power Zhenjiang Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-05-02
Anticipated expiration: 2032-11-30

Abstract

The utility model discloses a hoisting tool for an intermediate gear shaft of a high-power methanol engine, which comprises an inverted L-shaped hanging bracket, a lifting screw traversing mechanism and an intermediate gear shaft end connecting mechanism, wherein the lifting screw traversing mechanism is arranged on the upper side of a dovetail groove cross beam of the inverted L-shaped hanging bracket, the lower end of a dovetail block is embedded in the dovetail groove, the lifting screw is screwed in the top end of the dovetail block, a screw rod is screwed in the dovetail block, and two ends of the screw rod are respectively supported on the end head of the dovetail groove cross beam through bearing seats. One end of the speed reducing motor is fixed on one side of the upper end of the inverted L-shaped hanging bracket through a speed reducing motor supporting seat, and a speed reducing motor shaft is fixedly connected with one end of the screw rod. The intermediate gear shaft end connecting mechanism is fixed at the lower end of the vertical rod of the inverted L-shaped hanging bracket and comprises an upper cross beam, a middle nut seat, a lower nut seat, 2 pull rods and 2 nut bodies. The utility model improves the hoisting efficiency and ensures the hoisting safety. The hoisting device is suitable for hoisting intermediate gear shafts of different types, and improves the universality of the hoisting device.

Description

Intermediate gear shaft hoisting tool for high-power methanol engine

Technical Field

The utility model relates to a tool for horizontally lifting a stepped shaft, in particular to a lifting tool for horizontally lifting a middle gear shaft of a high-power methanol engine with the diameter of more than or equal to 100mm to a gear box, and belongs to the technical field of lifting tools.

Background

Gear transmission is one of the most widely used transmission modes in mechanical transmission, and in order to change transmission distance, transmission direction and transmission ratio, it is necessary to add a single intermediate gear(s) or a single intermediate gear set(s) between a driving gear and a driven gear. At present, the normal operation of parts or equipment such as an air inlet cam shaft, an air outlet cam shaft, a lubricating oil pump, a cooling water pump and the like of most marine methanol engines is realized by gear engagement transmission of a crankshaft transmission part, and an intermediate gear set are added in a gear box to realize the requirements of different transmission distances and different transmission ratios. Because the intermediate gear shaft of the large methanol engine is heavier and is limited by the gear box of the methanol engine and the assembly characteristics, the intermediate gear shaft needs to be horizontally hoisted, and the hoisting point can only be selected from a shaft end fixing plate fixed at one end of the intermediate gear shaft.

When the intermediate gear shaft is hoisted, as the lifting hole is not formed in the shaft end fixing plate fixedly connected with the end of the intermediate gear shaft, only the upper mounting hole and the lower mounting hole of the shaft end fixing plate can be used as the lifting hole, one long steel plate or one long steel pipe needs to be welded on one side of the fixing plate, one end of the long steel plate or one long steel pipe is pressed down by manpower in the hoisting process to balance the overturning moment of the intermediate gear shaft, the intermediate gear shaft is kept in a horizontal state and is continuously hoisted until the hoisting is finished, and the intermediate gear shaft is hoisted to a methanol machine gearbox horizontally through the hoisting fixing plate for assembly. The operation is very inconvenient, the serious potential safety hazard of the intermediate gear shaft being bumped or operators being injured exists, and the hoisting efficiency is very low; and can only be used for lifting the intermediate gear shaft of a methanol machine with one model, and has poor universality.

Disclosure of Invention

The utility model aims to provide a hoisting tool for a middle gear shaft of a high-power methanol engine, which is convenient for adjusting the hoisting position, so that the hoisting line coincides with the center of gravity of a stepped shaft which is hoisted horizontally, and the hoisting safety is ensured.

The utility model is realized by the following technical scheme:

the middle gear shaft hoisting tool of the high-power methanol engine comprises an inverted L-shaped hanging bracket, a lifting ring screw traversing mechanism and a middle gear shaft end connecting mechanism, wherein the inverted L-shaped hanging bracket comprises a dovetail groove cross beam and a vertical rod, and the top end of the vertical rod is vertically fixed below one end of the dovetail groove cross beam; the lifting screw transversely moving mechanism is arranged on the upper side of the cross beam and comprises a dovetail block, a lifting screw, a screw rod, a pair of bearing blocks and a speed reducing motor, the lower end of the dovetail block is embedded in a dovetail groove on the upper side of the dovetail groove cross beam, the lifting screw is screwed in the top end of the dovetail block, the screw rod is screwed in a central threaded hole of the dovetail block, two ends of the screw rod are respectively supported in the upper end of the bearing block through bearings, and the lower ends of the bearing blocks are respectively and vertically fixed on the end heads of the dovetail groove cross beam; one end of the gear motor is fixed on one end of the gear motor support seat through an upper right-angle bracket, the other end of the gear motor support seat is fixed on one side of the upper end of the upright rod, and the gear motor shaft extends into one end of the screw rod and is fixedly connected with one end of the screw rod; the intermediate gear shaft end connecting mechanism is fixed at the lower end of the vertical rod of the inverted L-shaped hanging bracket.

The object of the present utility model can be further achieved by the following technical means.

Further, the intermediate gear shaft end connecting mechanism comprises an upper cross beam, a middle nut seat, a lower nut seat, 2 pull rods and 2 nut bodies, the bottom of each vertical rod is vertically fixed on the middle part of the upper cross beam, the upper ends of the pull rods respectively penetrate through the two ends of the upper cross beam upwards, the lower ends of the pull rods respectively penetrate through the two ends of the middle nut seat and the two ends of the lower nut seat downwards in sequence, and the lower ends of the pull rods are fixedly connected with the upper cross beam and the lower nut seat; the nut body is respectively embedded and fixed in the middle nut seat and the lower nut seat; one end of the bearing bolt is respectively screwed into the nut body, and is respectively screwed into corresponding threaded holes at the upper end and the lower end of the shaft end fixing plate after penetrating out of the respective nut body, and the shaft end fixing plate is fixed on the large end head of the intermediate gear shaft; a screw hole center distance adjusting mechanism is also arranged between the middle nut seat and the lower nut seat. One end of the middle nut seat is welded with an inverted L-shaped handle.

Further, the screw hole center distance adjusting mechanism comprises a threaded section and a plurality of adjusting nuts at the lower part of the pull rod, the threaded section vertically penetrates through two ends of the middle nut seat respectively, the adjusting nuts are screwed on the threaded section of the pull rod respectively and are located on the upper side and the lower side of the middle nut seat respectively, the upper end and the lower end of the pull rod penetrate through two ends of the corresponding upper cross beam and two ends of the lower nut seat respectively, and the upper cross beam, 2 pull rods and the lower nut seat are fixedly connected into a rectangular frame through fastening nuts screwed on the ends of the upper end and the lower end of the pull rod respectively.

Further, the gear motor is a 4GN-3K speed-regulating gear shaft motor, the power N=25W, the rotating speed n=54 rpm and the torque M=4.4 Nm of the speed-regulating gear shaft motor.

According to the utility model, the screw rod is driven to rotate by the gear motor, so that the dovetail block is driven to move on the dovetail groove cross beam of the inverted L-shaped hanger, the horizontal position of the lifting ring screw screwed on the dovetail block is changed, and the lifting center line passes through the gravity center of the lifted intermediate gear shaft, so that the intermediate gear shaft can be kept in a horizontal lifting state. The hoisting efficiency is improved, and the hoisting safety is ensured. According to the utility model, the distance between the center of the middle nut seat and the center of the lower nut seat is adjusted by respectively screwing the adjusting nuts on the upper side and the lower side of the middle nut seat, so that the device is suitable for different hole distances of threaded holes on the upper end and the lower end of the shaft end fixing plate of the middle gear shaft with different types, and the universality of the device is improved.

Advantages and features of the utility model will be illustrated and explained by the following non-limiting description of preferred embodiments, given by way of example only with reference to the accompanying drawings.

Drawings

FIG. 1 is a front view of the present utility model;

FIG. 2 is a left side view of FIG. 1 with the intermediate gear shaft and load bearing bolts removed;

fig. 3 is a cross-sectional view A-A of fig. 1.

Detailed Description

The utility model is further described below with reference to the drawings and examples.

As shown in fig. 1 to 3, the utility model comprises an inverted L-shaped hanging bracket 1, a lifting screw traversing mechanism 2 and a middle gear shaft end connecting mechanism 3, wherein the inverted L-shaped hanging bracket 1 comprises a dovetail groove cross beam 11 and a vertical rod 12, the top end of the vertical rod 12 is vertically welded and fixed under the right end of the dovetail groove cross beam 11, and the strength and the rigidity of the inverted L-shaped hanging bracket 1 are enhanced through a rib plate 13 welded at the joint of the dovetail groove cross beam 11 and the vertical rod 12.

The lifting screw transverse moving mechanism 2 is arranged on the upper side of the dovetail groove cross beam 11 and comprises a dovetail block 21, a lifting screw 22, a screw rod 23, a pair of bearing blocks 24 and a gear motor 25, the lower end of the dovetail block 21 is embedded in a dovetail groove 111 on the upper side of the dovetail groove cross beam 11, the lifting screw 22 is screwed in the top end of the dovetail block 21, the screw rod 23 is screwed in a central threaded hole 211 of the dovetail block 21, two ends of the screw rod 23 are respectively supported in the upper end of the bearing blocks 24 through bearings 241, and the lower ends of the bearing blocks 24 are respectively and vertically fixed on the end heads of the dovetail groove cross beam 11. The left end of the gear motor 25 is fixed on the right end of the gear motor support seat 26 through an upper right-angle bracket 252, the left end of the gear motor support seat 26 is fixed on the right side of the upper end of the upright rod 12, and a gear motor shaft 251 extends into the right end of the screw rod 23 and is fixedly connected with the right end of the screw rod 23 through a flat key 231. The gear motor 25 of the present utility model is a 4GN-3K speed-regulating gear motor, which has a power n=25w, a rotational speed n=54 rpm, and a torque m=4.4 Nm.

The intermediate gear shaft end connecting mechanism 3 is fixed at the lower end of the vertical rod 12 of the inverted L-shaped hanger 1. Comprises an upper beam 31, a middle nut seat 32, a

lower nut seat

33, 2

pull rods

34 and 2 nut bodies 35, wherein the bottom of a vertical rod 12 is vertically welded and fixed on the middle part of the upper beam 31, the upper ends of the pull rods 34 respectively pass through the two ends of the upper beam 31 upwards, the two ends of the middle nut seat 32 can be fixed after vertically moving in the middle of the pull rod 34, and after the middle of the pull rod 34 is fixedly connected with the two ends of the middle nut seat 32 respectively, the two ends of the pull rod 34 are fixedly connected with the two ends of the upper beam 31 and the two ends of the lower nut seat 33 respectively. The nut bodies 35 are respectively inserted into the middle nut seat 32 and the lower nut seat 33, and are respectively fixed by the set screws 321. The bearing bolts 38 are screwed into the nut bodies 35, and then screwed into the corresponding screw holes 102 at the upper and lower ends of the shaft end fixing plate 101, and the shaft end fixing plate 101 is fixed to the large end of the intermediate gear shaft 10. The right end of the middle nut seat 32 in fig. 2 is welded with an inverted L-shaped handle 321, and an operator holds the inverted L-shaped handle 321 to adjust the direction of the lifted middle gear shaft 10, so that the middle gear shaft 10 is conveniently installed in the gear box.

Screw hole center distance adjusting mechanisms 36 are further arranged between the middle nut seat 32 and the lower nut seat 33, so that the distance between the middle nut seat 32 and the lower nut seat 33 can be conveniently adjusted, different hole distances of screw holes 102 at the upper end and the lower end of the shaft end fixing plate 101 of the middle gear shaft 10 with different types can be adapted, and the use universality of the utility model is improved.

The screw hole center distance adjusting mechanism 36 comprises a threaded section 341 and 4 adjusting nuts 342 at the lower part of the pull rod 34, wherein the threaded section 341 vertically passes through two ends of the middle nut seat 32 respectively, the adjusting nuts 342 are screwed on the threaded section 341 of the pull rod 34 respectively and are positioned at the upper side and the lower side of the middle nut seat 32 respectively, the upper end and the lower end of the pull rod 34 respectively pass through two ends of the corresponding upper cross beam 31 and two ends of the lower nut seat 33, and the upper cross beam 32, the 2 pull rods 34 and the lower nut seat 33 are fixedly connected into a rectangular frame through fastening nuts 37 respectively screwed at the upper end and the lower end of the pull rod 34. The center distance between the nut body 35 in the middle nut seat 32 and the nut body 35 in the lower nut seat 33 can be adjusted by loosening the adjusting nuts 342 on the upper side and the lower side of the middle nut seat 32 respectively, so that the hoisting requirements of the intermediate gear shafts 10 of different models can be met, and the universality of the utility model is improved.

In addition to the above embodiments, other embodiments of the present utility model are possible, and all technical solutions formed by equivalent substitution or equivalent transformation are within the scope of the present utility model.

Claims

1. High-power methanol engine intermediate gear axle hoist and mount frock, its characterized in that: the device comprises an inverted L-shaped hanging bracket, a lifting ring screw traversing mechanism and a middle gear shaft end connecting mechanism, wherein the inverted L-shaped hanging bracket comprises a dovetail groove cross beam and a vertical rod, and the top end of the vertical rod is vertically fixed below one end of the dovetail groove cross beam; the lifting screw transversely moving mechanism is arranged on the upper side of the dovetail groove cross beam and comprises a dovetail block, a lifting screw, a screw rod, a pair of bearing blocks and a speed reducing motor, the lower end of the dovetail block is embedded in a dovetail groove on the upper side of the dovetail groove cross beam, the screw rod is screwed in a central threaded hole of the dovetail block, the lifting screw is screwed in the top end of the dovetail block, two ends of the screw rod are respectively supported in the upper end of the bearing block through bearings, and the lower ends of the bearing blocks are respectively and vertically fixed on the end heads of the dovetail groove cross beam; one end of the gear motor is fixed on one end of the gear motor support seat through an upper right-angle bracket, the other end of the gear motor support seat is fixed on one side of the upper end of the upright rod, and the gear motor shaft extends into one end of the screw rod and is fixedly connected with one end of the screw rod; the intermediate gear shaft end connecting mechanism is fixed at the lower end of the vertical rod of the inverted L-shaped hanging bracket.

2. The intermediate gear shaft hoisting tool for the high-power methanol engine, as claimed in claim 1; the method is characterized in that: the intermediate gear shaft end connecting mechanism comprises an upper cross beam, a middle nut seat, a lower nut seat, 2 pull rods and 2 nut bodies, wherein the bottom of each vertical rod is vertically fixed on the middle part of the upper cross beam, the upper ends of the pull rods respectively pass through the two ends of the upper cross beam upwards, and the lower ends of the pull rods respectively pass through the two ends of the middle nut seat and the two ends of the lower nut seat downwards in sequence and are fixedly connected with the upper cross beam and the lower nut seat; the nut body is respectively embedded and fixed in the middle nut seat and the lower nut seat; one end of the bearing bolt is respectively screwed into the nut body, and is respectively screwed into corresponding threaded holes at the upper end and the lower end of the shaft end fixing plate after penetrating out of the respective nut body, and the shaft end fixing plate is fixed on the large end head of the intermediate gear shaft; a screw hole center distance adjusting mechanism is also arranged between the middle nut seat and the lower nut seat.

3. The intermediate gear shaft hoisting tool for the high-power methanol engine, as claimed in claim 2; the method is characterized in that: screw centre-to-centre spacing adjustment mechanism includes the screw thread section and the several adjusting nut of pull rod lower part, screw thread section passes well nut seat both ends perpendicularly respectively, and adjusting nut twists respectively on the screw thread section of pull rod, and is located the upside down side of well nut seat respectively, and the upper and lower end of pull rod passes corresponding entablature both ends and lower nut seat both ends respectively, through the fastening nut of twisting the end at the upper and lower end of pull rod respectively with entablature, 2 pull rods and lower nut seat fixed connection rectangular frame.

4. The intermediate gear shaft hoisting tool for the high-power methanol engine, as claimed in claim 1; the method is characterized in that: the speed reducing motor is a 4GN-3K speed regulating gear shaft motor, the power N=25W of the speed regulating gear shaft motor, the rotating speed n=54 rpm and the torque M=4.4 Nm.

5. The intermediate gear shaft hoisting tool for the high-power methanol engine, as claimed in claim 2; the method is characterized in that: one end of the middle nut seat is welded with an inverted L-shaped handle.