Chain tensioning device for first conveyor of heading machine

Abstract

The utility model belongs to the technical field of mining equipment, and provides a chain tensioning device for a first conveyor of a heading machine, which comprises a tensioning oil cylinder mechanism and a spring mechanism, and the tensioning oil cylinder mechanism comprises a piston, a cylinder body, a piston rod body and a piston rod head; the piston is fixed to one end of the piston rod body through the locking nut, and the end, away from the piston, of the piston rod body is connected with the piston rod head. The spring mechanism comprises an ejector rod, a screw rod, a spring and a spring seat, the ejector rod is connected with the screw rod, the spring sleeves the screw rod, the spring seat sleeves the outer sides of the screw rod and the spring, and the part, extending out of the spring seat, of the screw rod is locked by a nut; the tensioning oil cylinder compresses the spring seat, double functions of the inner spring and the outer spring are designed in the spring seat, larger tensioning force is provided, the pre-pressing type air filter is additionally arranged on the oil cylinder steel cylinder, exhaust can be conveniently conducted when an oil cylinder piston rod cavity stretches out, and air inside the tensioning oil cylinder is effectively prevented from entering a hydraulic system to damage hydraulic elements.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mine equipment technical field relates to a chain tensioning of conveyer, specifically is a first conveyer chain tensioning device of heading machine. BACKGROUND

[0002] At present, with the power and transportation capacity of the first conveyer of heading machine becoming larger and larger, the chain tensioning device commonly used in the industry adopts single spring screw rod tensioning or single spring cylinder tensioning structure, which cannot provide sufficient tensioning force, and the cylinder adopts single-acting cylinder, when the piston rod is extended, the air in the rod cavity will flow back to the hydraulic system, causing cavitation of the hydraulic elements and damage to the hydraulic system.

[0003] Furthermore, after the equipment is used for a period of time, the chain is prone to slack and jumping, which accelerates the wear of the chain and shortens the service life of the chain due to the inability to maintain sufficient tensioning force. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a first conveyer chain tensioning device of heading machine, which can provide greater tensioning force without changing the original tensioning device installation size, effectively preventing the air in the tensioning cylinder from entering the hydraulic system and damaging the hydraulic elements.

[0005] The utility model adopts the technical scheme of:

[0006] A first conveyer chain tensioning device of heading machine, comprising a tensioning cylinder mechanism and a spring mechanism, the tensioning cylinder mechanism comprising a piston, a cylinder body, a piston rod body and a piston rod head; the piston is fixed at one end of the piston rod body through a locking nut, the end of the piston rod body away from the piston is connected to the piston rod head, and the piston rod body is sleeved in the cylinder body; the spring mechanism comprises a jack, a screw rod, a spring and a spring seat, the jack is connected to the screw rod, the spring is sleeved on the screw rod, the outer sides of the screw rod and the spring are sleeved with the spring seat, and the part of the screw rod extending out of the spring seat is locked by a nut.

[0007] Further, a pre-press air filter is arranged on the cylinder body.

[0008] Further, the spring comprises an inner spring and an outer spring, which are sleeved on the screw rod and arranged between the jack and the spring seat, respectively.

[0009] Further, the piston rod body and the piston rod head are connected by threads, and the jack and the screw rod are connected by threads.

[0010] Further, the locking screw nut is a slotted nut, which is locked by a split pin.

[0011] The utility model discloses a beneficial effect is: adopt the compression spring seat of tight cylinder, the inside and outside spring double -acting of design in spring seat, provide greater tight force, increase the pre -press air filter on the cylinder steel tube, the exhaust of oil cylinder piston rod cavity is convenient when going out, effectively prevent the air in the tight cylinder inside from entering the hydraulic system and damage hydraulic element. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is the structural schematic diagram of the utility model device;

[0013] Fig. 2 It is the connection schematic diagram of screw rod and ejector rod in the utility model device;

[0014] Fig. 3 It is the connection schematic diagram of piston rod body and piston rod head in the utility model device;

[0015] Fig. 4 It is the connection schematic diagram of inside and outside spring in spring seat in the utility model device;

[0016] In the drawing, 1, locking nut;2, piston;3, cylinder body;4, piston rod body;5, pre -press air filter;6, piston rod head;7, ejector rod;8, outer spring;9, inner spring;10, spring seat;11, washer;12, split pin;13, slotted nut;14, screw rod. DETAILED DESCRIPTION

[0017] In order to make the above -mentioned purpose, feature and advantage of the utility model more obvious, easy to understand, below, the technical scheme in the embodiment of the utility model will be clearly, completely described with the drawings in the embodiment of the utility model. Obviously, the described embodiment only is a part of the embodiment of the utility model, is not all the embodiment. Based on the embodiment in the utility model, all other embodiments that the ordinary skill in the art obtains without making the creative labor, belong to the range of protection of the utility model.

[0018] A first conveyor chain tensioning device of a heading machine, such as Figs. 1 to 4As shown, the device comprises a tensioning cylinder mechanism and a spring mechanism, the tensioning cylinder mechanism comprises a piston 2, a cylinder body 3, a piston rod body 4, and a piston rod head 6; the piston 2 is fixed at one end of the piston rod body 4 through a locking nut 1, the piston rod body 4 is connected with the piston rod head 6 at an end away from the piston 2, the piston rod body 4 is sleeved in the cylinder body 3, and a pre-press air filter 5 is arranged on the cylinder body 3; the spring mechanism comprises a jacking rod 7, a screw rod 14, a spring, and a spring seat 10, the jacking rod 7 is connected with the screw rod 14, the spring is sleeved on the screw rod 14, the screw rod 14 and the outer side of the spring are sleeved with the spring seat 10, the part of the screw rod 14 extending out of the spring seat 10 is locked by a nut, the spring comprises an inner spring 9 and an outer spring 8, and is sleeved on the screw rod 14 and arranged between the jacking rod 7 and the spring seat 10, respectively, the nut locking the screw rod 14 is a slotted nut 13, and is locked by being inserted through a split pin 12, and a gasket 11 is further arranged between the screw rod 14 and the spring seat 10.

[0019] The piston rod body 4 and the piston rod head 6 are threadedly connected, and the jacking rod 7 and the screw rod 14 are threadedly connected, and the axial directions of the two are all milled with square grooves, and the depth of the thread can be adjusted to finely adjust the tensioning stroke.

[0020] When the device is connected to a hydraulic system, the piston rod body 4 of the cylinder extends out, the air in the rod cavity is discharged through the pre-press air filter 5 and will not return to the hydraulic system to cause damage to the hydraulic elements, when the piston rod body 4 contacts the jacking rod 7, the inner spring 9 and the outer spring 8 are compressed, so that greater tensioning force is generated to tension the chain.

[0021] The above is only a specific implementation manner of the device, but the protection scope of the device is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the device, which should be covered in the protection scope of the device. Therefore, the protection scope of the device should be subject to the protection scope of the claims.

Claims

1. A first conveyor chain tensioning device for a roadheader, characterized in that: The device comprises a tensioning oil cylinder mechanism and a spring mechanism, the tensioning oil cylinder mechanism comprises a piston, a cylinder, a piston rod body and a piston rod head, the piston is fixed at one end of the piston rod body through a locking nut, the piston rod body is connected with the piston rod head at the other end away from the piston, and the piston rod body is sleeved in the cylinder; the spring mechanism comprises a jack, a screw rod, a spring and a spring seat, the jack is connected with the screw rod, the spring is sleeved on the screw rod, the outer sides of the screw rod and the spring are sleeved with the spring seat, and the part of the screw rod extending out of the spring seat is locked by a nut.

2. The first conveyor chain tensioning device of the heading machine according to claim 1, characterized in that: A pre-press air filter is arranged on the cylinder.

3. The first conveyor chain tensioning device of the heading machine according to claim 1, characterized in that: The spring comprises an inner spring and an outer spring, which are sleeved on the screw rod and arranged between the jack and the spring seat.

4. The first conveyor chain tensioning device of the heading machine according to claim 1, characterized in that: The piston rod body and the piston rod head are connected by threads, and the jack and the screw rod are connected by threads.

5. The first conveyor chain tensioning device of the heading machine according to claim 1, characterized in that: The nut of the screw rod is a slotted nut, which is locked by a split pin.

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