Mechanical automatic tensioning structure of chain

Abstract

The utility model discloses a mechanical automatic tensioning structure of a chain, which relates to the technical field of bucket wheel machines and comprises a slide way, a bearing seat, a tensioning roller, a mounting frame component and an elastic component. The slideway is arranged on the bucket-wheel machine body and is in sliding fit with a bearing seat, and a tensioning roller matched with the chain is rotationally mounted on the bearing seat, so that the tensioning roller can slide in the tension direction of the chain; the installation frame assembly is arranged on the bucket-wheel machine body, and an elastic assembly connected with the bearing seat is installed on the installation frame assembly so as to provide continuous elastic force and push the tensioning roller to move to compensate extension of the chain. The chain extension compensation device can realize automatic compensation of chain extension without manual intervention, prolongs the service life of the chain, and has better use value.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of bucket wheel machine, specifically, a mechanical automatic tensioning structure of chain. BACKGROUND

[0002] In the operation process of the bucket wheel machine equipment, the stability and efficient operation of the chain play a key role in the overall performance. The traditional bucket wheel machine chain tensioning structure mostly relies on manual adjustment by workers, which has many drawbacks.

[0003] Manual adjustment cannot ensure the timeliness and accuracy of adjustment. Under actual working conditions, the chain may stretch or relax due to frequent start, stop, and impact of materials, etc. Once the worker fails to timely detect and accurately adjust, the chain may jump teeth, come off, etc., which seriously affects the normal operation of the bucket wheel machine, and may even cause production accidents.

[0004] In addition, the manual adjustment process is time-consuming and labor-intensive, and requires workers to have rich experience and professional skills, and the operation proficiency is quite high. Manual adjustment often cannot respond quickly, so that the chain is difficult to maintain in an ideal tensioning state under some working conditions, thereby reducing the overall operation efficiency and reliability of the equipment. INVENTION CONTENTS

[0005] The utility model aims at solving the problems in the background art, and further provides a mechanical automatic tensioning structure of chain.

[0006] The technical scheme adopted by the utility model to solve the technical problems is:

[0007] A mechanical automatic tensioning structure of chain, comprising a slide, a bearing seat, a tensioning drum, a mounting frame assembly and an elastic assembly.

[0008] The slide is arranged on the bucket wheel machine body and has the bearing seat slidingly fitted thereon, and the bearing seat has the tensioning drum cooperating with the chain rotatably installed thereon, so that the tensioning drum can slide along the tension direction of the chain.

[0009] The mounting frame assembly is arranged on the bucket wheel machine body and has the elastic assembly connected with the bearing seat installed thereon, so as to provide continuous elastic force and push the tensioning drum to move to compensate the elongation of the chain.

[0010] Further, the slide has two and is symmetrically arranged on the bucket wheel machine body, and the bearing seat is slidingly fitted between the two slides.

[0011] Further, the mounting frame assembly comprises a mounting plate, a fixed plate and a mounting beam.

[0012] The installation plate is provided with two and is symmetrically arranged on the bucket wheel body, each of the two installation plates is provided with a fixed plate, and the two fixed plates are provided with an installation beam fixedly connected with the elastic assembly.

[0013] Further, the inner side of the installation plate is in a sawtooth structure, and the outer side of the fixed plate is in a sawtooth structure matched with the sawtooth structure of the inner side of the installation plate.

[0014] Further, the elastic assembly comprises a lead screw, an internally threaded seat, a sleeve, a sliding block and a spring.

[0015] The lead screw is connected with the installation beam, and the internally threaded seat is threadedly connected on the lead screw, one side of the internally threaded seat is connected with the sleeve sleeved on the outer side of the lead screw, the sliding block connected with the bearing seat is slidingly matched on the sleeve, and the spring sleeved on the outer side of the sleeve is arranged between the sliding block and the internally threaded seat.

[0016] Further, the length of the sleeve is not more than two-thirds of the length of the lead screw.

[0017] Further, the elastic assembly further comprises a limiting seat.

[0018] The limiting seat is fixedly arranged on the sleeve to limit the maximum moving distance of the sliding block.

[0019] Further, the rubber pad is additionally arranged on the contact surface between the limiting seat and the sliding block.

[0020] Compared with the prior art, the utility model has the beneficial effects that:

[0021] The utility model discloses a sliding way, bearing seat, tensioning roller, mounting frame assembly and elastic assembly cooperate and set up, do not need manual intervention, realize the automatic compensation of chain elongation, prolong the life of chain, when the tension of chain is caused by abrasion, temperature change or load elongation and drops, the elastic assembly releases precompression force, pushes the bearing seat and moves along the sliding way, and the tensioning roller moves along with the bearing seat, and applies reverse tension to the chain, offsets the elongation of chain, and maintains constant tension. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is the structural schematic diagram of the utility model;

[0023] Figure 2 It is the structural schematic diagram of the mounting frame assembly;

[0024] Figure 3 It is the structural schematic diagram of the elastic assembly;

[0025] Figure 4 It is the installation position schematic diagram of the limiting seat;

[0026] Wherein: 1, slide; 2, bearing seat; 3, tensioning roller; 4, mounting frame assembly; 41, mounting plate; 42, fixed plate; 43, mounting beam; 5, elastic assembly; 51, screw; 52, internal thread seat; 53, sleeve; 54, sliding block; 55, spring; 56, limit seat. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model. The utility model will be further described in combination with the drawings and embodiments:

[0028] Referring to the drawings Figure 1 - the drawings Figure 3 As shown in the drawings, a mechanical automatic tensioning structure of a chain comprises a slide 1, a bearing seat 2, a tensioning roller 3, a mounting frame assembly 4 and an elastic assembly 5.

[0029] The slide 1 is arranged symmetrically on the bucket wheel machine body, and the bearing seat 2 is arranged between the two slides 1 and is in sliding fit with the bearing seat 2, and the tensioning roller 3 is rotatably arranged on the bearing seat 2 and is matched with the chain, so that the tensioning roller 3 can slide along the tension direction of the chain.

[0030] The mounting frame assembly 4 is arranged on the bucket wheel machine body, and the elastic assembly 5 connected with the bearing seat 2 is arranged on the mounting frame assembly 4, so as to provide continuous elastic force and push the tensioning roller 3 to move to compensate the elongation of the chain.

[0031] In the specific implementation process of the utility model, when the chain tension decreases due to wear, temperature change or load elongation, the elastic assembly 5 releases the pre-compression force, pushes the bearing seat 2 to move along the slide 1, and the tensioning roller 3 moves with the bearing seat 2 to apply reverse tension to the chain, offset the elongation of the chain and maintain constant tension. At this time, the guide function of the slide 1 ensures that the tensioning roller 3 only moves in the tension direction and avoids lateral deviation, the elastic coefficient of the elastic assembly 5 is matched with the chain tension, self-adaptive adjustment is realized, the chain is looser, the displacement of the tensioning roller 3 pushed by the elastic force is greater, and vice versa. This design does not need manual intervention, automatically compensates the elongation of the chain and prolongs the service life of the chain.

[0032] In the above scheme, referring to the drawings Figure 2 As shown in the drawings, the mounting frame assembly 4 comprises a mounting plate 41, a fixed plate 42 and a mounting beam 43. The mounting plate 41 is arranged symmetrically on the bucket wheel machine body, and each of the two mounting plates 41 is provided with a fixed plate 42 on the inner side, and the mounting beam 43 fixedly connected with the elastic assembly 5 is arranged between the two fixed plates 42.

[0033] In addition, the inner side of the mounting plate 41 is sawtoothed, and the outer side of the fixed plate 42 is also sawtoothed to match the sawtooth structure of the inner side of the mounting plate 41, so as to adjust the initial position of the elastic assembly 5, so that the elastic assembly 5 can only move in the horizontal direction during the change of the elastic assembly 5, and displacement in the up-down direction does not occur.

[0034] Among them, the sawtooth structure provides a plurality of equidistant tooth grooves, and the initial position of the elastic assembly 5 is stepwise adjusted by tooth engagement. In use, different tooth positions can be selected according to the initial elongation of the chain to realize quantitative control of the pre-tightening force. At the same time, the tooth shape of the mounting plate 41 and the fixed plate 42 forms a mechanical interlock to prevent displacement of the mounting beam 43 under vibration or impact, thereby affecting the adjustment accuracy.

[0035] In the above scheme, referring to the accompanying drawings Figure 3 As shown in the drawings, the elastic assembly 5 includes a lead screw 51, an internally threaded seat 52, a sleeve 53, a sliding block 54, and a spring 55. The lead screw 51 is connected to the mounting beam 43, and an internally threaded seat 52 is threadedly connected to the lead screw 51. One side of the internally threaded seat 52 is connected to the sleeve 53 which is sleeved on the outside of the lead screw 51. The length of the sleeve 53 is not more than two-thirds of the length of the lead screw 51. A sliding block 54 connected to the bearing seat 2 is slidingly fitted on the sleeve 53. A spring 55 sleeved on the outside of the sleeve 53 is arranged between the sliding block 54 and the internally threaded seat 52, so that the initial position of the spring 55 can be changed by adjusting the internally threaded seat 52.

[0036] In the scheme, when the chain elongation causes the tension to drop, the spring 55 releases the pre-tightening force to push the sliding block 54 to move, and the tensioning drum 3 synchronously displaces to compensate for the elongation. When the chain is shortened, the spring 55 is further compressed, the pre-tightening force is increased, and over-tightening is prevented. The change of the position of the internally threaded seat 52 can pre-adjust the initial tension of the spring 55, thereby improving the use effect.

[0037] In addition, referring to the accompanying drawings Figure 4 As shown in the drawings, the elastic assembly 5 further includes a limiting seat 56. The limiting seat 56 is fixedly arranged on the sleeve 53 to limit the maximum movement distance of the sliding block 54.

[0038] When the chain tension suddenly changes or the spring 55 ages, the limiting seat 56 can prevent the sliding block 54 from exceeding the designed stroke, thereby protecting the mechanical parts from impact damage. Of course, a rubber pad (not shown in the figure) is additionally arranged on the contact surface between the limiting seat 56 and the sliding block 54 to reduce impact noise and absorb energy.

[0039] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A mechanical automatic tensioning structure for a chain, characterized in that: Includes slide rail (1), bearing housing (2), tensioning roller (3), mounting bracket assembly (4), and elastic component (5); The slide (1) is set on the bucket wheel body and a bearing seat (2) is slidably fitted on it. A tensioning roller (3) that cooperates with the chain is rotatably installed on the bearing seat (2) so that the tensioning roller (3) can slide along the chain tension direction. The mounting bracket assembly (4) is mounted on the bucket wheel body and has an elastic component (5) connected to the bearing seat (2) to provide continuous elastic force and drive the tensioning drum (3) to move to compensate for chain elongation.

2. The automatic mechanical tensioning structure for a chain according to claim 1, characterized in that: The slide rails (1) are arranged symmetrically on the bucket wheel body, and the two slide rails (1) are slidably fitted with bearing seats (2).

3. The automatic mechanical tensioning structure for a chain according to claim 2, characterized in that: The mounting bracket assembly (4) includes a mounting plate (41), a fixing plate (42), and a mounting beam (43); There are two mounting plates (41) symmetrically arranged on the bucket wheel body. Each mounting plate (41) has a fixing plate (42) on its inner side. A mounting beam (43) that is fixedly connected to the elastic component (5) is provided between the two fixing plates (42).

4. The automatic mechanical tensioning structure for a chain according to claim 3, characterized in that: The inner side of the mounting plate (41) has a sawtooth structure, and the outer side of the fixing plate (42) has a sawtooth structure that matches the sawtooth structure on the inner side of the mounting plate (41).

5. The automatic mechanical tensioning structure for a chain according to claim 4, characterized in that: The elastic component (5) includes a lead screw (51), an internal thread seat (52), a sleeve (53), a slider (54), and a spring (55); The lead screw (51) is connected to the mounting beam (43), and an internal thread seat (52) is threaded onto it. One side of the internal thread seat (52) is connected to a sleeve (53) sleeved outside the lead screw (51), and a slider (54) connected to the bearing seat (2) is slidably fitted on the sleeve (53). A spring (55) sleeved outside the sleeve (53) is provided between the slider (54) and the internal thread seat (52).

6. The automatic mechanical tensioning structure for a chain according to claim 5, characterized in that: The length of the sleeve (53) does not exceed two-thirds of the length of the lead screw (51).

7. The automatic mechanical tensioning structure for a chain according to claim 6, characterized in that: The elastic component (5) also includes a limiting seat (56); The limiting seat (56) is fixedly installed on the sleeve (53) to limit the maximum movement distance of the slider (54).

8. The automatic mechanical tensioning structure for a chain according to claim 7, characterized in that: A rubber pad is added to the contact surface between the limiting seat (56) and the slider (54).

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