Spiral tensioning device for belt conveyor

Abstract

The utility model relates to the technical field of belt conveyors, and discloses a spiral tensioning device for a belt conveyor, which comprises a rack, a screw rod, a nut and a tensioning roller, a sliding base is arranged in the rack, a nut groove is arranged at the bottom of the sliding base, the nut is arranged in the nut groove in a vertically floatable manner, through holes are arranged on two sides of the nut groove corresponding to the screw rod, and the tensioning roller is arranged in the nut groove. A certain moving space is at least formed between the through hole and the screw rod in the vertical direction, and the tensioning roller is connected with the sliding base through a mounting base. The nut slides in the nut groove and keeps a relatively stable position relation with the screw rod, so that the impact of radial acting force on the screw rod can be effectively reduced and avoided, and the service life of the screw rod is prolonged. The utility model has the characteristics of simple structure, good stability and reliability, strong practicability, long service life and good use effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to a belt conveyor technical field especially relates to a spiral tensioning device for belt conveyor. BACKGROUND

[0002] The spiral tensioning device of the belt conveyor is a mechanism for adjusting the tension of the conveying belt, which keeps the conveying belt at a proper tension and stably and reliably conveys the material.

[0003] In the prior art, the utility model discloses a spiral tensioning device for belt conveyor, the nut connected with the screw rod is fixed on the sliding base, and the sliding base is slidingly arranged on the tail frame, however, the structure has the following defects: 1) the screw rod is always subjected to axial force, which affects the service life of the screw rod; 2) since the rack is generally made of sectional material, there is an error in the outer dimension, and there is a cooperation gap between the sliding base, which causes the screw rod to be subjected to axial force and radial force impact caused by the position deviation of the sliding base and the nut, further affecting the service life of the screw rod.

[0004] Therefore, the applicant proposes the spiral tensioning device for belt conveyor to reduce or avoid the axial and radial force of the screw rod, and improve the service life of the screw rod and the stability and reliability of the spiral tensioning device. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a spiral tensioning device for belt conveyor to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A spiral tensioning device for belt conveyor, comprising a rack, a screw rod, a nut and a tensioning drum, the rack is provided with a sliding base, the bottom of the sliding base is provided with a nut groove, the nut is floatingly arranged in the nut groove, the both sides of the nut groove are provided with through holes corresponding to the screw rod, the through holes and the screw rod have a certain space in the up-down direction, and the tensioning drum is connected with the sliding base through a mounting seat.

[0008] When the sliding base floats up and down due to the error of the sectional material, the nut slides in the nut groove and keeps a relatively stable position relationship with the screw rod, which can effectively reduce and avoid the impact of the radial force on the screw rod and improve the service life of the screw rod.

[0009] Preferably, the tensioning drum is arranged on the mounting seat, the mounting seat is arranged above the rack, the mounting seat and the sliding base are connected through bolts, and the mounting seat and the sliding base can be clamped and fixed on the rack by tightening the bolts.

[0010] The bearing plate is provided between the mounting base and the rack, and the bearing plate has through holes corresponding to the bolts.

[0011] By the bolt connection between the mounting base and the sliding base, or the bearing plate provided between the mounting base and the rack, the friction between the rack and the sliding base and the mounting base or the bearing plate is increased, the bolt locking function is realized, when the tension reaches the appropriate position, the position of the tensioning roller is locked, the axial tension of the screw rod is effectively reduced or avoided, and the service life of the screw rod is prolonged.

[0012] Further preferably, the nut groove is provided with a reinforcing rib plate on both sides.

[0013] The surface of the reinforcing rib plate is parallel to the axial direction of the screw rod.

[0014] By the reinforcing rib plate, the structural strength and stability of the nut groove can be effectively improved.

[0015] Further preferably, the sliding base is provided with a limiting stopper extending out of the sliding hole in the top of the rack at one end close to the conveyor body, the end of the mounting base abuts against the limiting stopper, a tensioning support force is provided for the tensioning roller and the mounting base, the radial force of the bolt is reduced, and the structural stability and reliability and the service life of the bolt are improved.

[0016] The utility model has the characteristics of simple structure, good stability and reliability, strong practicability, long service life and good use effect. ACCURATE DRAWINGS

[0017] The utility model will be further described below with reference to the drawings:

[0018] Figure 1 is a top view structural schematic diagram of the utility model embodiment;

[0019] Figure 2 is Figure 1 a front view structural schematic diagram;

[0020] Figure 3 is a cooperation structural schematic diagram of the screw rod, the sliding base, the bearing plate and the bolt;

[0021] Figure 4 is a side view structural schematic diagram of the cooperation of the sliding base and the screw rod. DETAILED DESCRIPTION

[0022] In the description of the utility model, need explanation further, unless another explicit provision and limitation, term "arrangement", "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through intermediate medium indirectly connected, can be two element inside the intercommunication.For ordinary skilled person in the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0023] The technical solutions in the embodiments of the utility model will be described clearly and completely 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 ordinary skilled person in the art without creative labor fall within the scope of protection of the utility model. Embodiment

[0024] As Figures 1-4 shown, a spiral tensioning device for belt conveyor, including frame 1, screw rod 2, nut 3 and tensioning drum 4, the frame 1 is provided with sliding base 5, the bottom of sliding base 5 is provided with nut slot 5-1, nut 3 is set in nut slot 5-1 and can float up and down, the both sides of nut slot 5-1 are provided with through hole 5-1-1 corresponding to screw rod 2, and the through hole 5-1-1 and screw rod 2 have certain activity space at least in the up-down direction, refer to Figure 4, the through hole 5-1-1 in the embodiment is a long hole in the up-down direction, when the sliding base 5 floats up and down due to profile error or the like, the sliding base 5 drives the nut groove 5-1 to move up and down, the nut 3 slides in the nut groove 5-1, the nut 3 and the screw rod keep a relatively stable coaxial position relationship, which can effectively reduce and avoid the impact of the radial force on the screw rod 2, and improve the service life of the screw rod 2. The tensioning roller 4 is connected with the sliding base 5 through the mounting seat 6, specifically, the tensioning roller 4 is arranged on the mounting seat 6, the mounting seat 6 is arranged above the rack 1, the mounting seat 6 and the sliding base 4 are connected through the bolt 7, the through hole on the mounting seat 6 corresponding to the bolt 7 is a light hole, the threaded hole corresponding to the bolt 7 is arranged on the sliding base 5, the mounting seat 6 and the sliding base 5 can be clamped and fixed on the rack 1 by tightening the bolt 7, in the embodiment, the bearing plate 8 is arranged between the mounting seat 6 and the rack 1 to increase the bearing surface, the bearing plate 8 has the light hole corresponding to the bolt 7, the thickness of the sliding base 5 relative to the bearing plate 8 is larger, the friction force between the rack 1 and the sliding base 5 and the bearing plate 8 is increased by tightening the bolt 7, the locking effect of the bolt is realized, and the tensioning roller 4 is locked in the appropriate position, at this time, the screw rod 2 can be reversed to remove the axial tension, or a certain axial tension can be kept, the axial tension on the screw rod 2 can be effectively reduced or avoided by locking and fixing, and the service life of the screw rod is further improved.

[0025] The reinforcing rib plate 5-3 is arranged on the both sides of the nut groove 5-1, the surface where the reinforcing rib plate 5-3 is arranged is parallel to the axial direction of the screw rod 2, and the structural strength and stability of the nut groove 5-1 can be effectively improved.

[0026] Referring to Figure 2 Preferably, the sliding base 5 is provided with the limiting stopper 5-2 extending out of the slide hole on the top of the rack 1 at one end close to the conveyor body, the limiting stopper 5-2 provides a limiting support force for the mounting seat 6 of the tensioning roller 4 when tensioning, the radial force on the bolt 7 can be reduced, the structural stability and reliability and the service life of the bolt 7 are improved.

[0027] Finally, it should be noted that: the above is only the preferred embodiment of the utility model, and is not used for limiting the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for the person skilled in the art, the technical scheme recorded in the foregoing embodiments can still be modified, or some technical features can be replaced equivalently, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A screw tensioner for a belt conveyor comprising a frame, a screw, a nut and a tension drum, characterized in that: The rack is internally provided with a sliding base, the bottom of the sliding base is provided with a nut groove, a nut is movably arranged in the nut groove, the both sides of the nut groove are provided with through holes corresponding to the screw, the through holes and the screw have a certain movement space in the vertical direction, and the tension roller is connected with the sliding base through a mounting seat.

2. A screw tensioner as claimed in claim 1, characterised in that: The tension roller is arranged on the mounting seat, the mounting seat is arranged above the rack, the mounting seat and the sliding base are connected through bolts, and the mounting seat and the sliding base can be clamped and fixed on the rack by tightening the bolts.

3. A screw tensioner as claimed in claim 2, wherein: A bearing plate is arranged between the mounting seat and the rack, and the bearing plate is provided with through holes corresponding to the bolts.

4. The screw tensioner of claim 1, wherein: The both sides of the nut groove are provided with reinforcing rib plates.

5. A screw tensioner as claimed in claim 4, wherein: The surface of the reinforcing rib plate is parallel to the axial direction of the screw.

6. The screw tensioner of claim 1, wherein: The sliding base is provided with a limiting block extending out of the sliding hole in the top of the rack and close to one end of the conveyor body.

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