Lifting appliance with adjustable hanging points and lifting method

Abstract

The invention discloses an adjustable hanging point lifting appliance and a lifting method, and the adjustable hanging point lifting appliance comprises a cross beam, a shaft sleeve, a long plate, a shaft, a lifting ring, a check ring, a fulcrum shaft, a bearing check ring, a roller assembly, a clamping seat, a clamping block, a screw rod, an adapter plate, a rocker arm, a connecting disc, a connecting pin, a movable lifting rod, a pin and a bearing, and the lifting ring can slide on the cross beam through the roller assembly so as to generate horizontal displacement relative to the movable lifting rod. Before hoisting, the rocker arm is rotated to drive the hoisting ring to displace relative to the movable hoisting rod, so that the hoisting ring is moved to the mass center position of the part, and hoisting balance is achieved. The lifting device can be used for lifting parts with lifting points not located at the mass centers of the lifted parts, adjustment is convenient and rapid, and the lifting efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation engine manufacturing, and in particular relates to a hoisting device with adjustable hanging points for a booster cylinder and a convergent-divergent nozzle unit and a hoisting method. Background Art

[0002] The lifting points and the center of mass of the afterburner cylinder and the expansion nozzle unit of the aircraft engine are not on the same cross section, which causes the parts to tilt when they are lifted directly by the lifting points. Since the lifting points on the parts cannot be changed, they can only be adjusted from the lifting fixture.

[0003] like Figure 1 As shown, the existing solution is to open a row of evenly spaced holes on the sling beam, and to balance the sling by installing the lifting rings in the holes at different positions. However, this operation method is inconvenient and requires multiple adjustments to the lifting ring positions. Summary of the invention

[0004] In view of the problems described in the background technology, the present invention aims to provide a sling with adjustable hanging points and a lifting method, which can be used for lifting parts whose hanging points are not at the center of mass of the lifted parts, and can be adjusted easily and quickly, thereby improving the lifting efficiency.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A sling with adjustable hanging points, comprising:

[0007] A crossbeam, wherein the crossbeam is provided with a guide rail;

[0008] Adaptor plates, the first ends of the two adaptor plates being respectively mounted at the two ends of the beam in the length direction;

[0009] A connecting plate, wherein the connecting plate is arranged below the cross beam, and two ends of the connecting plate are respectively connected to the second ends of the two adapter plates;

[0010] A screw rod, wherein the screw rod is arranged between the cross beam and the connecting plate, and both ends of the screw rod are rotatably connected to the two adapter plates respectively;

[0011] Long plates, two of which are respectively arranged on both sides of the beam in the width direction;

[0012] A clamping seat and a clamping block, wherein the clamping seat is between the two long boards and below the crossbeam, and the two sides of the clamping seat are respectively connected to the two long boards, and the clamping block is placed in the clamping seat, and a threaded hole is opened on the clamping block, and the screw is threadedly connected to the clamping block through the threaded hole;

[0013] A roller assembly, wherein a plurality of the roller assemblies are arranged between two long plates, and a rotating shaft of the roller assembly is fixed on the long plates, a roller of the roller assembly is in rolling cooperation with a guide rail on the crossbeam, and a plurality of roller assemblies are symmetrically arranged about the crossbeam on both sides in the width direction of the crossbeam;

[0014] A shaft and a lifting ring, the shaft and the lifting ring are arranged between the two long plates and above the crossbeam, wherein the shaft passes through the two long plates and the lifting ring is installed on the shaft;

[0015] A rocker arm connected to one end of the screw;

[0016] The first ends of the two movable suspension rods are connected to the connection plate via a connecting pin, and the two movable suspension rods are separated on both sides of the width direction of the beam, and the second ends of the movable suspension rods are installed with pins.

[0017] As an option, the crossbeam is an I-beam.

[0018] As an option, the roller of the roller assembly is connected to the rotating shaft via a rolling bearing, and the surface of the roller is a conical surface, and the roller is in rolling contact with the crossbeam via the conical surface.

[0019] Furthermore, the adjustable hanging point hanger also includes a shaft sleeve and a retaining ring. The two shaft sleeves are respectively fixed on the two long plates. The two ends of the shaft pass through the shaft sleeves and then penetrate the two long plates. The two retaining rings are installed on the shaft, and the lifting ring is installed on the shaft and between the two retaining rings.

[0020] Furthermore, the adjustable hanging point hanger also includes a support shaft, a bearing retaining ring and a bearing, wherein the support shaft, the bearing retaining ring and the bearing are arranged between the two long plates and between the crossbeam and the shaft, wherein the two ends of the support shaft are respectively installed on the two long plates, and two bearings are also installed on the support shaft, and the two bearings are separated by a bearing retaining ring.

[0021] An adjustable hanging point hoisting method adopts the above-mentioned adjustable hanging point hoist and includes: before lifting, the rocker arm is rotated to drive the lifting ring to displace relative to the movable lifting rod, and then the lifting ring is moved to the center of mass position of the part to achieve lifting balance.

[0022] Compared with the prior art, the present invention designs a plurality of roller assemblies on the sling, and the rollers in the roller assemblies mesh with the crossbeam, and then the screw is rotated through the rocker arm, so that the position of the lifting ring can be adjusted in the horizontal direction, which simplifies the operation steps and protects the screw from deformation due to force. When the lifting point is not at the center of mass of the hoisted part and the part needs to be lifted, the balance of the lifting process can be quickly satisfied, solving the problem of inconvenient operation of the existing slings. When using the present invention, the operator only needs to use a very small force to achieve the purpose of rapid adjustment, and the operation is convenient. Compared with traditional slings, a lot of time for repeated adjustment of the installation position of the lifting ring is saved. The adjustment accuracy, safety and efficiency of the present invention are higher than those of traditional slings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is the main view of the traditional spreader;

[0024] Figure 2It is a front view of the adjustable hanging point sling of the present invention;

[0025] Figure 3 It is a left side view of the adjustable hanging point hanger of the present invention;

[0026] Figure 4 It is a front view of the roller assembly in the adjustable hanging point sling of the present invention;

[0027] In the figure, 1-crossbeam; 2-bushing; 3-long board; 4-axis; 5-lifting ring; 6-retaining ring; 7-support shaft; 8-bearing retaining ring; 9-roller assembly; 91-conical surface; 92-rolling bearing; 10-seat; 11-block; 12-screw; 13-adapter plate; 14-rocker arm; 15-connecting plate; 16-connecting pin; 17-movable suspension rod; 18-pin; 19-bearing; 20-limiting plane. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but it should not be understood that the scope of the subject matter described in the present invention is limited to the following embodiments. Without departing from the above-mentioned technical ideas of the present invention, various modifications, substitutions and changes made according to the common technical knowledge and customary means in the field are included in the scope of the present invention.

[0029] like Figure 2 to Figure 4 As shown, the adjustable hanging point sling of the present invention includes a cross beam 1, a sleeve 2, a long plate 3, a shaft 4, a lifting ring 5, a retaining ring 6, a support shaft 7, a bearing retaining ring 8, a roller assembly 9, a holder 10, a block 11, a screw 12, an adapter plate 13, a rocker arm 14, a connecting plate 15, a connecting pin 16, a movable suspension rod 17, a pin 18 and a bearing 19.

[0030] Among them, the adapter plate 13 is installed on the beam 1, the connecting plate 15 is fixed between the two adapter plates 13, the two ends of the screw rod 12 are respectively fixed on the two adapter plates 13 and pass through the threaded holes on the clamp block 11, the clamp block 11 is placed in the clamp seat 10, the clamp seat 10 is installed on the long plates 3 on both sides of the beam 1, and the four roller assemblies 9 are respectively installed on the long plates 3 in pairs. The sleeve 2, shaft 4, lifting ring 5, retaining ring 6, support shaft 7, bearing retaining ring 8, and bearing 19 are symmetrically installed between the two long plates 3. The rocker arm 14 is installed at the exposed end of the screw rod 12, the connecting plate 15 is installed between the adapter plates 13 on the other two sides of the beam 1, and the connecting pin 16 is installed in the holes at both ends of the connecting plate 15, and then the movable suspension rod 17 is fixed to the connecting pin 16, and the sling and the parts are connected with the pin 18.

[0031] In the present invention, the structural features of the adjustable hanging point hanger are as follows:

[0032] (1) A roller assembly 9 is designed, and a conical surface 91 is provided on the roller of the roller assembly 9, which can engage with the cross beam 1 to transfer gravity and adjust the horizontal position of the lifting ring. A rolling bearing 92 is also installed on the roller to reduce friction when the roller rotates. As a solution, the roller assembly 9 includes four rollers, which are symmetrically arranged on both sides of the cross beam 1, so that the long board 3 can slide on the track on the upper edge of the cross beam 1 through the four rollers.

[0033] (2) A support shaft 7 is designed, on which a bearing 19 is installed. On the one hand, it is used to bear the weight of the long board 3, shaft 4, lifting ring 5, retaining ring 6, support shaft 7, bearing retaining ring 8, roller assembly 9, and clamping seat 10 for the screw rod 12 when the lifting device is not in use or in storage, so as to prevent the screw rod 12 from being deformed by force and difficult to rotate. On the other hand, the roller assembly 9 can be used to form an upper and lower set of rolling devices on the upper edge of the beam 1.

[0034] (3) A block 11 and a base 10 are designed. The block 11 is a cube with a threaded through hole at the center. The base 10 is a cube structure surrounded by four plates with open front and rear ends. The upper and lower end faces of the base 10 each have a through hole. The block 11 is inserted into the two through holes, and the through holes of the block 11 and the base 10 are matched with a large gap, so that the screw 12 is not subjected to force when the sling is not in use or in storage (the block 11 can move the screw 12 up and down relative to the base 10 to avoid the force being transmitted to the screw 12 through the base 10 and the block 11), thereby preventing the screw 12 from being deformed due to force.

[0035] (4) A connecting pin 16 is designed, the upper end of which is fixed to the connecting plate 15 by a nut, and the lower end is provided with a limiting plane 20. The two limiting planes 20 parallel to each other form a structure for limiting the rotation direction of the movable suspension rod 17. After being plugged into the groove at one end of the movable suspension rod 17, they are connected by a latch and a pin to limit the rotation direction, so that the movable suspension rod 17 is limited to rotate in a plane perpendicular to the beam 1 or the screw rod 12.

[0036] (5) Two movable suspension rods 17 are designed. The movable suspension rods 17 are rigid bodies to ensure that the parts do not shift during the lifting process.

[0037] Before lifting, the screw 12 is driven to rotate by rotating the rocker arm 14, and the threaded pair of the screw 12 and the block 11 drives the base 10, the long plate 3, the shaft 4 and the lifting ring 5 to slide left and right on the beam 1, and finally the lifting ring 5 is horizontally displaced relative to the plane where the two movable lifting rods 17 are located, and then the lifting ring 5 is moved to the center of mass position of the part to achieve lifting balance, and then the sling is connected to the lifting equipment, the movable lifting rod 17 is fixed to the lifting point on the part, and finally the part is lifted.

[0038] The contents not described in detail in the specification of the present invention belong to the prior art known to the professional and technical personnel in the field. Although the illustrative specific embodiments of the present invention are described above to facilitate the understanding of the present invention by the technical personnel in the field, it should be clear that the present invention is not limited to the scope of the specific embodiments. For the ordinary technical personnel in the field, as long as various changes are within the spirit and scope of the present invention defined and determined by the attached claims, these changes are obvious, and all inventions and creations using the concept of the present invention are protected.

Claims

1. A sling with adjustable hanging points, characterized in that: include: A crossbeam (1), wherein the crossbeam (1) is provided with a guide rail; Adaptor plates (13), wherein first ends of two adaptor plates (13) are respectively mounted at two ends of the crossbeam (1) in the length direction; A connecting plate (15), wherein the connecting plate (15) is arranged below the crossbeam (1), and two ends of the connecting plate (15) are respectively connected to the second ends of the two adapter plates (13); A screw rod (12), wherein the screw rod (12) is arranged between the cross beam (1) and the connecting plate (15), and the two ends of the screw rod (12) are respectively rotatably connected to the two adapter plates (13); Long plates (3), two long plates (3) are respectively arranged on both sides of the crossbeam (1) in the width direction; A card seat (10) and a card block (11), wherein the card seat (10) is located between the two long plates (3) and below the crossbeam (1), and the two sides of the card seat (10) are respectively connected to the two long plates (3), and the card block (11) is placed in the card seat (10), a threaded hole is opened on the card block (11), and the screw rod (12) is threadedly connected to the card block (11) through the threaded hole; A roller assembly (9), wherein a plurality of the roller assemblies (9) are arranged between the two long plates (3), and a rotating shaft of the roller assembly (9) is fixed on the long plate (3), and a roller of the roller assembly (9) is in rolling cooperation with a guide rail on the crossbeam (1), and the plurality of roller assemblies (9) are symmetrically arranged with respect to the crossbeam (1) on both sides in a width direction of the crossbeam (1); A shaft (4) and a lifting ring (5), wherein the shaft (4) and the lifting ring (5) are arranged between the two long plates (3) and located above the crossbeam (1), wherein the shaft (4) passes through the two long plates (3) and the lifting ring (5) is installed on the shaft (4); A rocker arm (14), wherein the rocker arm (14) is connected to one end of the screw rod (12); The movable suspension rods (17) are connected to the connection plate (15) at their first ends via connection pins (16), and the two movable suspension rods (17) are located on both sides of the width direction of the crossbeam (1), and the second ends of the movable suspension rods (17) are installed with pins (18).

2. The adjustable hanging point sling according to claim 1, characterized in that: The crossbeam (1) is an I-beam.

3. The adjustable hanging point sling according to claim 1, characterized in that: The roller of the roller assembly (9) is connected to the rotating shaft via a rolling bearing (92), and the surface of the roller is a conical surface (91), and the roller is in rolling contact with the crossbeam (1) via the conical surface.

4. The adjustable hanging point sling according to claim 1, characterized in that: It also comprises a shaft sleeve (2) and a retaining ring (6), wherein the two shaft sleeves (2) are respectively fixed on the two long plates (3), the two ends of the shaft (4) pass through the shaft sleeves (2) and then penetrate the two long plates (3), the two retaining rings (6) are installed on the shaft (4), and the lifting ring (5) is installed on the shaft (4) and between the two retaining rings (6).

5. The adjustable hanging point sling according to claim 1, characterized in that: The invention also comprises a support shaft (7), a bearing retaining ring (8) and a bearing (19), wherein the support shaft (7), the bearing retaining ring (8) and the bearing (19) are arranged between the two long plates (3) and between the crossbeam (1) and the shaft (4), wherein the two ends of the support shaft (7) are respectively mounted on the two long plates (3), and two bearings (19) are also mounted on the support shaft (7), and the two bearings (19) are separated by the bearing retaining ring (8).

6. A method for hoisting with adjustable hanging points, characterized in that: The adjustable hanging point sling according to claim 1 is used, and includes: before lifting, the rocker arm (14) is rotated to drive the lifting ring (5) to move relative to the movable lifting rod (17), and then the lifting ring (5) is moved to the center of mass position of the part to achieve lifting balance.

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