Single-lever type hoisting tool

Abstract

The utility model discloses a single-lever type hoisting tool which comprises a first pull rod and a second pull rod, the first pull rod is provided with a connecting part, an extending part and a first hanging part which are sequentially arranged, the connecting part and the first hanging part have the same lengthwise extending direction, and a containing groove with the groove bottom face obliquely arranged towards the extending part is formed in the connecting part; the second pull rod is provided with a hanging connection part, a middle part and a second hanging connection part which are sequentially arranged, the end, connected with the middle part, of the hanging connection part is located in the containing groove and hinged to the connecting part through a connecting shaft, an acute included angle is formed between the longitudinal extension directions of the hanging connection part and the second hanging connection part, and the hanging connection part is used for being connected with a lifting hook; the distance, relative to the connecting shaft, of the joint of the hoisting part and the hoisting hook in the lengthwise extension direction of the hoisting part is adjustable; clamping hanging plates are connected to the first hanging part and the second hanging part, the longitudinal extension directions of the second hanging part and the first hanging part are opposite when the two clamping hanging plates are parallel to each other, and the single-lever type hoisting tool can clamp an object to be hoisted.

Description

Technical Field

[0001] This utility model relates to the field of hoisting technology, and in particular to a single-lever hoisting fixture. Background Technology

[0002] During the hoisting and assembly production of urban rail vehicles, hoisting fixtures are usually used. The hoisting fixtures clamp the parts, and then the lifting hook hooks onto the hoisting fixtures. Subsequently, the lifting hooks rise and fall, moving the parts clamped by the hoisting fixtures to the corresponding assembly positions.

[0003] However, existing hoisting equipment uses a two-way clamping method and is mostly a mirror-symmetric structure, which has problems such as a large number of linkage levers and rotating shafts, poor working stability, and complicated maintenance process. Utility Model Content

[0004] The purpose of this invention is to provide a single-lever lifting fixture that solves the problems of existing lifting fixtures having a large number of linkage levers and rotating shafts, poor working stability, and complex maintenance processes.

[0005] The above-mentioned objectives of this utility model can be achieved by the following technical solutions:

[0006] This utility model provides a single-lever lifting fixture, comprising: a first pull rod having a connecting portion, an extension portion, and a first hook portion, wherein the extension portion is connected between the connecting portion and the first hook portion, the longitudinal extension direction of the connecting portion is the same as the longitudinal extension direction of the first hook portion, and a receiving groove is formed on the connecting portion, the bottom surface of the receiving groove being inclined towards the extension portion; a second pull rod having a lifting portion, a middle portion, and a second hook portion, wherein the middle portion is connected between the lifting portion and the second hook portion, one end of the lifting portion connected to the middle portion is located within the receiving groove, and the lifting portion is located within the receiving groove. One end of the receiving groove is hinged to the connecting part via a connecting shaft. The longitudinal extension direction of the lifting part and the longitudinal extension direction of the second hook part have an acute angle. The lifting part is used to connect with the lifting hook. In the longitudinal extension direction of the lifting part, the distance between the connection point of the lifting part and the lifting hook and the connecting shaft is adjustable. Both the first hook part and the second hook part are connected with clamping plates. When the two clamping plates are parallel to each other, the longitudinal extension direction of the second hook part is opposite to the longitudinal extension direction of the first hook part. The single-lever lifting fixture can clamp the object to be lifted.

[0007] Preferably, the lifting part includes a longitudinally extending lifting rod section, a sleeve slidably sleeved on the lifting rod section, and a locking fastener for fixing the sleeve to the lifting rod section, wherein a lifting ring for connecting to a lifting hook is connected to the sleeve.

[0008] Preferably, a vertical rod is connected between the sleeve and the lifting ring.

[0009] Preferably, the distance between the vertical rod and one end of the sleeve is 1 / 5 to 3 / 5 of the length of the sleeve.

[0010] Preferably, the surfaces of the two clamping plates that are close to each other are clamping surfaces, and multiple clamping posts are provided on the clamping surfaces. The multiple clamping posts are used to limit and clamp the object to be lifted.

[0011] Preferably, the single-lever lifting fixture is used to lift the tread brake unit, and the clamping plate is provided with a through hole for the brake shoe support fixing bolt of the tread brake unit to extend out.

[0012] Preferably, along the direction of gravity, two clamping column groups are arranged side by side on the clamping surface. Each clamping column group includes two clamping columns that are aligned at intervals. The distance between the two clamping column groups is 2mm to 3mm greater than the brake shoe support height of the tread braking unit.

[0013] Preferably, a flexible protective layer is provided on the clamping surface, and a flexible protective sleeve is provided on the clamping column.

[0014] Preferably, the angle between the longitudinal extension direction of the suspension part and the longitudinal extension direction of the second hook part is in the range of 10° to 30°.

[0015] Preferably, the length of the lifting part is 2 to 4 times the length of the middle part.

[0016] The features and advantages of this utility model are as follows: The single-lever lifting fixture provided in this utility model embodiment forms a lever structure by hinged connection of the first tie rod and the second tie rod, which simplifies the structure of the lifting fixture and ensures the stability and reliability during the lifting process; at the same time, in the longitudinal extension direction of the lifting part, the distance between the connection point of the lifting part and the lifting hook relative to the connecting shaft is adjustable, so that the single-lever lifting fixture can be used for horizontal lifting assembly of objects with eccentric centers of gravity. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the single-lever hoisting fixture provided in the embodiments of this utility model.

[0019] Explanation of icon numbers:

[0020] 1. First pull rod; 11. Connecting part; 12. Extension part; 13. First hook part; 14. Receiving groove;

[0021] 2. Second tie rod; 21. Lifting joint; 211. Lifting rod section; 2111. Positioning hole; 212. Sleeve; 2121. Mounting hole; 213. Lifting ring; 214. Vertical rod; 22. Middle section; 23. Second hanging joint;

[0022] 3. Clamping plate; 31. Clamping column; 32. Through hole;

[0023] 4. Limit block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1As shown, this utility model provides a single-lever lifting fixture, including a first pull rod 1 and a second pull rod 2. The first pull rod 1 has a connecting part 11, an extension part 12, and a first hook part 13. The extension part 12 is connected between the connecting part 11 and the first hook part 13. The longitudinal extension direction of the connecting part 11 is the same as the longitudinal extension direction of the first hook part 13. A receiving groove 14 is formed on the connecting part 11, and the bottom surface of the receiving groove 14 is inclined towards the extension part 12. The second pull rod 2 has a lifting part 21, a middle part 22, and a second hook part 23. The middle part 22 is connected between the lifting part 21 and the second hook part 23. One end of the lifting part 21 connected to the middle part 22 is located in the receiving groove 14, and the lifting part 22 is connected to the middle part 23. One end of the lifting part 21 located within the receiving groove 14 is hinged to the connecting part 11 via a connecting shaft. The longitudinal extension direction of the lifting part 21 and the longitudinal extension direction of the second hook part 23 form an acute angle. The lifting part 21 is used to connect with a lifting hook, and the distance between the connection point of the lifting part 21 and the lifting hook relative to the connecting shaft is adjustable in the longitudinal extension direction of the lifting part 21 to suit horizontal lifting assembly of objects with eccentric centers of gravity. Clamping plates 3 are connected to both the first hook part 13 and the second hook part 23. When the two clamping plates 3 are parallel to each other, the longitudinal extension direction of the second hook part 23 is opposite to that of the first hook part 13, and the single-lever lifting fixture can clamp the object to be lifted. Thus, a lever structure is formed by the hinge of the first tie rod 1 and the second tie rod 2 to simplify the lifting fixture structure and ensure stability and reliability during the lifting process. The first tie rod, the second tie rod, and the clamping plate are preferably made of No. 45 steel.

[0026] Specifically, such as Figure 1 As shown, the maximum opening angle of the two clamping plates 3 is limited by the cooperation between the receiving groove 14 on the first pull rod 1 and the lifting part 21 on the second pull rod 2, thus balancing ease of use and reliability. Furthermore, a limiting block 4 is provided on one side of the middle part 22. The minimum opening angle of the two clamping plates 3 is limited by the cooperation between the limiting block 4 on the second pull rod 2 and the connecting part 11 on the first pull rod 1, thereby preventing the two clamping plates 3 from contacting and damaging each other when not in use. At the maximum opening angle, the lifting part 21 abuts against the bottom surface of the receiving groove 14; at the minimum opening angle, the end of the connecting part 11 near the connecting shaft abuts against the limiting block 4.

[0027] In use, manually move the second pull rod 2 to open the two clamping plates 3, then clamp the two clamping plates 3 on both sides of the object to be lifted. At this time, the two clamping plates 3 are parallel to each other. By adjusting the distance between the connection point of the lifting joint 21 and the lifting hook relative to the connecting shaft in the longitudinal extension direction of the lifting joint 21, it is ensured that the object to be lifted will not tilt during the lifting process and will always remain in a horizontal state to avoid damage to the object during the lifting process. During lifting, the crane pulls the second pull rod 2. Under the action of leverage, the second pull rod 2 has a tendency to rotate relative to the first pull rod 1. The heavier the object to be lifted, the greater the rotational force of the second pull rod 2, and the greater the clamping force of the clamping plates 3 on the object to be lifted, thereby preventing the object to be lifted from falling during the lifting process.

[0028] According to a preferred embodiment of the present invention, the lifting part 21 includes a longitudinally extending lifting rod section 211, a sleeve 212 slidably sleeved on the lifting rod section 211, and a locking fastener for fixing the sleeve 212 to the lifting rod section 211. A lifting ring 213 for connecting to a lifting hook is connected to the sleeve 212. For example,... Figure 1 As shown, the boom section 211 has multiple positioning holes 2111 spaced apart along its longitudinal extension direction. Correspondingly, the sleeve 212 has multiple mounting holes 2121 along its axial direction. The positioning holes 2111 and mounting holes 2121 are used to position the sleeve 212 on the boom section 211, and the sleeve 212 is fixedly connected to the boom section 211 by fasteners. To balance ease of operation and connection reliability, the sleeve 212 is fixedly connected to the boom section 211 through two mounting holes 2121 near its two ends. Preferably, the fasteners include bolts with holes and cotter pins.

[0029] According to a preferred embodiment of the present invention, such as Figure 1 As shown, a vertical rod 214 connects the sleeve 212 and the lifting ring 213. By setting the vertical rod 214 between the sleeve 212 and the lifting ring 213, the second tie rod 2 can be connected to the lifting hook. At the same time, the setting of the vertical rod 214 can distribute the lifting force to the entire sleeve 212, thereby extending the service life of the sleeve 212.

[0030] According to a preferred embodiment of the present invention, the distance between the vertical rod 214 and one end of the sleeve 212 is 1 / 5 to 3 / 5 of the length of the sleeve 212, so as to increase the adjustment range of the relative position of the lifting ring 213 in the length direction of the lifting rod section 211, and make the single-lever lifting fixture provided in this application embodiment have a wider range of applications. Specifically, in the assembled and used state, the relative position of the vertical rod 214 and the connecting shaft has the following two possibilities: the vertical rod 214 is located at 1 / 5 to 3 / 5 of the end of the sleeve 212 near the connecting shaft, or the vertical rod 214 is located at 1 / 5 to 3 / 5 of the end of the sleeve 212 away from the connecting shaft. The two relative positions of the vertical rod 214 can be switched by reversing the direction of the sleeve 212 and then fitting it onto the lifting rod section 211.

[0031] According to a preferred embodiment of the present invention, such as Figure 1 As shown, the surfaces of the two clamping plates 3 that are close to each other are the clamping surfaces. Multiple clamping posts 31 are provided on these surfaces to limit and clamp the object to be lifted. By providing multiple clamping posts 31, the limiting and anti-detachment performance of the clamping plates 3 on the object to be lifted is improved. Specifically, the surface of the clamping post 31 that contacts the object to be lifted is a plane to increase the contact area between the clamping post 31 and the object, thereby ensuring the reliability of the clamping post 31 in limiting and clamping the object. The clamping post 31 located below the object to be lifted also serves a supporting function.

[0032] According to a preferred embodiment of the present invention, such as Figure 1 As shown, the single-lever lifting fixture is used to lift the tread brake unit. The clamping plate 3 is provided with a through hole 32 for the brake shoe support fixing bolt of the tread brake unit to extend out. By setting the through hole 32 to avoid the brake shoe support fixing bolt of the tread brake unit, the clamping plate 3 is ensured to fit against the side of the brake shoe support.

[0033] According to a preferred embodiment of this utility model, two sets of clamping posts 31 are arranged side by side on the clamping surface along the direction of gravity. Each set of clamping posts 31 includes two clamping posts 31 spaced apart and aligned. The distance between the two sets of clamping posts 31 is 2mm to 3mm greater than the height of the brake shoe support of the tread braking unit. Specifically, as shown... Figure 1 As shown, four clamping posts 31 are provided on the clamping surface of the clamping plate 3. The four clamping posts 31 are spaced apart at the four vertices of a rectangle. The two lower clamping posts 31 also serve a supporting function. The two upper clamping posts 31 cooperate with the two lower clamping posts 31 to prevent the tread braking unit from swaying relative to the single-lever lifting fixture during hoisting operations. Preferably, the distance between the clamping posts 31 along the direction of gravity is 2mm to 3mm greater than the brake shoe support height of the tread braking unit, so that each clamping post 31 can be inserted into the predetermined position during hoisting clamping, which is convenient for production personnel to operate and use.

[0034] According to a preferred embodiment of this utility model, a flexible protective layer is provided on the clamping surface, and a flexible protective sleeve is fitted on the clamping column 31. This is to prevent scratches on the object to be lifted during the use of the single-lever lifting fixture.

[0035] According to a preferred embodiment of the present invention, the angle between the longitudinal extension direction of the lifting part 21 and the longitudinal extension direction of the second hook part 23 is in the range of 10° to 30°, so that the two clamping plates 3 of the single-lever lifting fixture can quickly enter the clamping state of parallel clamping the object to be lifted. Specifically, when the single-lever lifting fixture is used to lift the tread brake unit, the angle between the longitudinal extension direction of the lifting part 21 and the longitudinal extension direction of the second hook part 23 is determined by the width of the brake shoe support in the tread brake unit, so as to quickly achieve the clamping and fixing of the brake shoe support by the single-lever lifting fixture.

[0036] According to a preferred embodiment of the present invention, the length of the lifting section 21 is 2 to 4 times the length of the middle section 22. By setting the length of the lifting section 21 to 2 to 4 times the length of the middle section 22, the single-lever lifting fixture becomes a force-saving lever during lifting, thereby achieving resource conservation.

[0037] Based on the above description, the single-lever lifting fixture provided in this embodiment of the present invention has the following beneficial effects:

[0038] The single-lever lifting fixture provided in this embodiment of the utility model forms a lever structure by hinged connection of the first tie rod 1 and the second tie rod 2, which simplifies the structure of the lifting fixture and ensures stability and reliability during the lifting process. At the same time, in the longitudinal extension direction of the lifting part 21, the distance between the connection point of the lifting part 21 and the lifting hook relative to the connecting shaft is adjustable, so that the single-lever lifting fixture can be used for horizontal lifting assembly of objects with eccentric centers of gravity. By setting multiple clamping columns 31 on the clamping surface of the clamping plate 3, the limiting and anti-detachment performance of the clamping plate 3 for the object to be lifted is improved, and the object to be lifted is given a certain supporting role. When the single-lever lifting fixture is used to lift the tread brake unit, the clamping plate 3 is provided with through holes 32 to avoid the brake shoe fixing bolts of the tread brake unit, thereby ensuring that the clamping plate 3 and the brake shoe fit together on the side.

[0039] The above descriptions are merely a few embodiments of this utility model. Those skilled in the art can make various modifications or variations to the embodiments of this utility model based on the content disclosed in the application documents without departing from the spirit and scope of this utility model.

Claims

1. A single lever hoisting tool, characterized in that, include: The first pull rod has a connecting part, an extension part and a first hook part. The extension part is connected between the connecting part and the first hook part. The longitudinal extension direction of the connecting part is the same as the longitudinal extension direction of the first hook part. A receiving groove is formed on the connecting part. The bottom surface of the receiving groove is inclined towards the extension part. The second tie rod has a lifting part, a middle part, and a second hook part. The middle part is connected between the lifting part and the second hook part. One end of the lifting part connected to the middle part is located in the receiving groove, and the end of the lifting part located in the receiving groove is hinged to the connecting part through a connecting shaft. The longitudinal extension direction of the lifting part and the longitudinal extension direction of the second hook part have an acute angle. The lifting part is used to connect with a lifting hook, and the distance between the connection point of the lifting part and the lifting hook and the connecting shaft is adjustable in the longitudinal extension direction of the lifting part. Both the first and second hook-up parts are connected to clamping plates. When the two clamping plates are parallel to each other, the longitudinal extension direction of the second hook-up part is opposite to that of the first hook-up part, and the single-lever lifting fixture can clamp the object to be lifted.

2. The single lever lifting tool according to claim 1, characterized in that The lifting section includes a longitudinally extending lifting rod section, a sleeve slidably sleeved on the lifting rod section, and a locking fastener for fixing the sleeve to the lifting rod section. A lifting ring for connecting to a lifting hook is connected to the sleeve.

3. The single lever lifting tool according to claim 2, characterized in that A vertical rod connects the sleeve and the lifting ring.

4. The single lever lifting tool according to claim 3, characterized in that The distance between the vertical rod and one end of the sleeve is 1 / 5 to 3 / 5 of the length of the sleeve.

5. The single lever lifting tool of claim 1, wherein, The surfaces of the two clamping plates that are close to each other are clamping surfaces. Multiple clamping columns are provided on the clamping surfaces, and the multiple clamping columns are used to limit and clamp the object to be lifted.

6. The single lever lifting tool according to claim 5, characterized in that The single-lever lifting fixture is used to lift the tread brake unit, and the clamping plate is provided with through holes for the brake shoe support fixing bolts of the tread brake unit to extend out.

7. The single lever lifting tool according to claim 6, characterized in that Along the direction of gravity, two clamping column groups are arranged side by side on the clamping surface. Each clamping column group includes two clamping columns that are aligned at intervals. The distance between the two clamping column groups is 2mm to 3mm greater than the brake shoe support height of the tread braking unit.

8. The single lever lifting tool of claim 5, wherein, A flexible protective layer is provided on the clamping surface, and a flexible protective sleeve is fitted on the clamping column.

9. The single lever lifting tool of claim 1, wherein, The angle between the longitudinal extension direction of the lifting part and the longitudinal extension direction of the second hook part is in the range of 10° to 30°.

10. The single lever lifting tool of claim 1, wherein, The length of the lifting part is 2 to 4 times the length of the middle part.

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