CN216686097U - Large-scale lifting machine lower part sprocket overspeed device tensioner - Google Patents

Abstract

The utility model relates to a lower chain wheel tensioning device of a large elevator, belonging to the technical field of industrial conveying equipment. Sprocket overspeed device tensioner is including connecting bearing frame and the U type jib at lifting machine lower part sprocket pivot both ends, the vertical sliding connection of lifting machine support body at bearing frame and lower part sprocket pivot both ends, U type jib transversely sets up, including the armed lever of sill bar and both sides, and its both sides armed lever strides the lower part support body of lifting machine, is located the downside of the bearing frame at both ends respectively, and the tip of two armed levers articulates respectively in the both sides of support body, and the lower part of the bearing frame at both ends is connected with the both sides armed lever of U type jib through the connecting plate respectively, the both ends of connecting plate are articulated with bearing frame and armed lever respectively, the gravity box has been hung at the middle part of the sill bar of U type jib. The tensioning device provided by the utility model utilizes the lever principle to downwardly tension the bearing seats at the two ends of the lower chain wheel through the gravity box, so that the chain wheel is continuously tensioned.

Description

Large-scale lifting machine lower part sprocket overspeed device tensioner

Technical Field

The utility model relates to the technical field of industrial lifting conveying equipment, in particular to a lower chain wheel tensioning device of a large-scale elevator.

Background

The TH large-scale bucket elevator has wide application in industrial production, in order to meet the requirement of long-time use, a tensioning device needs to be designed for a lower chain wheel of the elevator, the existing tensioning device for the lower chain wheel of the elevator is basically a screw type tensioning device, and the tensioning device is of a rigid structure, so that equipment operation is obstructed, and higher maintenance cost is generated. The tensioning screw rod is required to be adjusted frequently along with the abrasion of the chain and the chain wheel in the operation process of the hoister, so that the pre-tensioning force required by the normal operation of the hoister is ensured.

When the pretension force of the hoisting machine is adjusted, an operator only adjusts the pretension force according to experience, so that unskilled workers are difficult to adjust the pretension force moderately. The chain wheel and the chain are quickly abraded due to over-tight adjustment; the chain is easy to jump the groove after being adjusted too loosely. In addition, the adjustment amount of the tensioning screws on the two sides of the hoister is difficult to keep balance, and the phenomenon of chain deviation occurs.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model designs the lower chain wheel tensioning device of the large-scale elevator, and the tensioning device can generate tensioning force in a self-adaptive manner without frequent manual adjustment.

The technical scheme adopted by the utility model is as follows: the tensioning device comprises a bearing seat and a U-shaped suspender, the bearing seat is connected to two ends of a chain wheel rotating shaft at the lower part of the elevator, the bearing seat is connected with a vertical sliding body of an elevator frame body at two ends of the chain wheel rotating shaft at the lower part of the elevator, the U-shaped suspender is transversely arranged and comprises a bottom rod and two side arm rods, the two side arm rods stride over the lower part of the elevator frame body and are respectively located at the lower sides of the bearing seats at the two ends, the end parts of the two arm rods are respectively hinged to two sides of the frame body, the lower parts of the bearing seats at the two ends are respectively connected with the two side arm rods of the U-shaped suspender through connecting plates, the two ends of each connecting plate are respectively hinged to the bearing seat and the arm rods, and a gravity box is hung at the middle part of the bottom rod of the U-shaped suspender. The shaft ends of the chain wheels are connected with the elevator frame body in a sliding mode through bearing seats, the bearing seats on the two sides are connected with the U-shaped hanging rods of the gravity box, and the U-shaped hanging rods generate equal downward pulling force on the bearing seats on the two sides through the self gravity of the gravity box, so that the chain wheels are tensioned. The tensioning force of the chain wheel does not need to be manually and frequently adjusted in the using process, and the chain wheel is convenient to apply.

Furthermore, positioning plates are respectively vertically arranged at the joints of the two sides of the lower frame body of the elevator and the end parts of the arm rods at the two sides, a plurality of positioning holes are uniformly distributed on the positioning plates, and the end parts of the arm rods are inserted into the positioning holes in the positioning plates through pin shafts and connected with the positioning holes.

Furthermore, the length from the hinged position of the connecting plate and the arm rod to the end part of the arm rod is less than the length from the connecting end of the arm rod and the bottom rod. The lever principle is utilized to improve the tension force brought by the gravity block.

Furthermore, the lower part support body of lifting machine is equipped with vertical slide respectively at the both ends of lower part sprocket pivot, and the bearing frame at both ends is arranged in the slide of lower part support body both sides respectively, the both sides of bearing frame are provided with the both sides wall sliding connection of slider and slide respectively.

Furthermore, an annular groove is formed in the middle of the bottom rod, and the gravity box is hung on the annular groove of the bottom rod of the U-shaped hanging rod through a hanging hook. The gravity box is convenient to take and hang, the annular groove is formed in the middle of the bottom rod, the gravity box can be accurately hung in the middle of the bottom rod, and the arm rods on two sides of the hanging rod are guaranteed to be stressed the same.

Compared with the prior art, the lower chain wheel tensioning device of the large elevator disclosed by the utility model has the advantages that: the tensioning device is composed of bearing seats and a hinged U-shaped suspender, wherein two ends of a chain wheel rotating shaft are connected with the elevator frame body in a sliding mode, the gravity box of the U-shaped suspender generates downward pulling force on the bearing seats on two sides, so that the chain wheel is tensioned, the tensioning force is determined by the weight of the gravity box, the force is constant, the tensioning force cannot change along with the abrasion of the chain and the chain wheel, and frequent manual adjustment is not needed. And the two ends of the rotating shaft are stressed in a balanced manner, so that the condition of chain deviation cannot occur, and the application is more convenient.

Drawings

Fig. 1 is a schematic structural diagram of a lower chain wheel tension device of a large-scale elevator.

In the figure, a lifting machine 1, a chain wheel rotating shaft 2, a bearing seat 3, a 4-U-shaped suspender, a positioning plate 5, a gravity box 6, a connecting plate 7, a slideway 11, a sliding block 31, an arm rod 41, a positioning hole 51 and a hook 61 are arranged.

Detailed Description

The utility model is further described with reference to the following figures and specific embodiments. The technical solutions in the embodiments of the present invention are clearly and completely described, and the described embodiments are only some embodiments, but not all embodiments of the present invention. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention.

As shown in fig. 1, the present invention discloses an embodiment of a lower sprocket tensioning device for a large elevator, the lower sprocket is installed at the lower part of the elevator 1, and the tensioning device in this embodiment comprises a bearing seat 3 and a U-shaped suspension rod 4 connected at both ends of a lower sprocket rotating shaft 2. The lower part support body of lifting machine 1 is equipped with vertical slide 11 respectively at the both ends of sprocket pivot 2, and the bearing frame 3 at both ends is arranged in the slide 11 of lower part support body both sides respectively, and the both sides of bearing frame 3 are provided with slider 31 and the both sides wall sliding connection of slide 11 respectively.

The U-shaped boom 4 is horizontally disposed and includes a bottom bar and two side arm bars 41, wherein the two side arm bars 41 are horizontally inserted from one side of the elevator frame body to stride over the lower frame body of the elevator 1 and are respectively located at the lower sides of the bearing seats 3 at the two ends. The ends of the two arm rods 41 are respectively hinged on the two sides of the frame body. The connection parts of the two sides of the lower frame body of the elevator 1 and the end parts of the arm rods 41 on the two sides are respectively provided with a positioning plate 5 along the vertical direction, the positioning plates 5 are uniformly distributed with a plurality of positioning holes 51 along the vertical direction, and the end parts of the arm rods 41 are provided with holes and are inserted into the positioning holes 51 on the positioning plates 5 through pin shafts to be connected with the positioning holes 51.

The lower parts of the bearing seats 3 at the two ends of the chain wheel rotating shaft 2 are respectively connected with the arm rods 41 at the two sides of the U-shaped suspender 4 through connecting plates 7, and the two ends of each connecting plate 7 are respectively hinged with the bearing seats 3 and the arm rods 41. Wherein, the length from the hinged part of the connecting plate 7 and the arm rod 41 to the end part of the arm rod 41 is less than the length from the connecting end of the arm rod 41 and the bottom rod.

The middle part of the bottom rod of the U-shaped suspender 4 is hung with a gravity box 6. The middle part of the bottom rod is provided with an annular groove, and the gravity box 6 is hung at the annular groove of the bottom rod of the U-shaped suspender 4 through a hook 61.

The above description is only for the preferred embodiment of the present invention, and should not be taken as limiting the scope of the utility model, which is defined by the appended claims and the description of the utility model.

Claims (5)

1. Large-scale lifting machine lower part sprocket overspeed device tensioner, a serial communication port, overspeed device tensioner is including connecting bearing frame and the U type jib at lifting machine lower part sprocket pivot both ends, the vertical sliding connection of lifting machine support body at bearing frame and lower part sprocket pivot both ends, the horizontal setting of U type jib, including the armed lever of sill bar and both sides, the lower part support body of lifting machine is striden across to its both sides armed lever, is located the downside of the bearing frame at both ends respectively, and the tip of two armed levers articulates respectively in the both sides of support body, and the lower part of the bearing frame at both ends is connected with the both sides armed lever of U type jib through the connecting plate respectively, the both ends of connecting plate are articulated with bearing frame and armed lever respectively, the gravity box has been hung at the middle part of the sill bar of U type jib.

2. The lower chain wheel tensioning device for the large elevator as claimed in claim 1, wherein the lower frame of the elevator has locating plates vertically disposed at the joints between the two sides of the lower frame and the ends of the two side arm rods, the locating plates are uniformly provided with a plurality of locating holes, and the ends of the arm rods are inserted into the locating holes of the locating plates through pin shafts and connected with the locating holes.

3. The lower chain wheel tensioning device for the large elevator as claimed in claim 2, wherein the length from the joint of the connecting plate and the arm to the end of the arm is less than the length from the end of the connecting end of the arm and the bottom bar.

4. The lower chain wheel tensioning device for the large elevator as defined in claim 3, wherein the lower frame of the elevator has vertical slideways at two ends of the lower chain wheel shaft, the bearing seats at two ends are located in the slideways at two sides of the lower frame, and the sliding blocks are arranged on two sides of the bearing seats and connected to two side walls of the slideways in a sliding manner.

5. The lower chain wheel tensioning device for the large elevator as defined in claim 4, wherein the bottom bar has an annular groove in the middle, and the gravity box is suspended by a hook in the annular groove of the bottom bar of the U-shaped suspension bar.

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