CN102278081A

CN102278081A - Tensioning and early warning mechanism of feeding plate-type chain in drilling machine

Info

Publication number: CN102278081A
Application number: CN2011101930644A
Authority: CN
Inventors: 关彪
Original assignee: WUXI JINFAN DRILLING EQUIPMENT CO Ltd
Current assignee: WUXI JINFAN DRILLING EQUIPMENT CO Ltd
Priority date: 2011-07-11
Filing date: 2011-07-11
Publication date: 2011-12-14

Abstract

The invention relates to a chain tensioning mechanism and in particular relates to a tensioning and early warning mechanism of a feeding plate-type chain in a drilling machine. According to the technical scheme provided by the invention, the tensioning and early warning mechanism of the feeding plate-type chain in the drilling machine comprises a mounting seat which is fixed at the end part of a mast body, a chain wheel shaft is rotatably arranged on the mounting seat, and a chain wheel is fixed on the chain wheel shaft; and the head end of a feeding chain is connected with a feeding mechanism, the middle segment of the feeding chain is engaged with the chain wheel, an adjusting screw rod is in threaded connection at the end part of the mast body, the inner end part of the adjusting screw rod is connected with the tail end part of the feeding chain, the outer end part of the adjusting screw rod is in threaded connection with an adjusting nut, and a pressure spring is sleeved on the adjusting screw rod and located between the adjusting nut and the end part of the mast body. Obvious loose edges or tight edges of the feeding chain are omitted, so as to reduce factors resulting in failures and provide early warning when the feeding chain is stretched to the limit.

Description

Rig feeds the tensioning and the early warning mechanism of board-like chain

Technical field

The present invention relates to a kind of chain tensioning mechanism, especially a kind of rig feeds the tensioning and the early warning mechanism of board-like chain.

Background technology

The widely used chain tension form that feeds all is to regulate the screw mandrel pre-tightening mechanism basically in construction now.The screw mandrel of certain-length is all installed feeding the chain two ends by this mechanism, regulates by nut during assembling that chain is formed certain pretightning force.Though this mechanism is simple in structure, be widely used, but screw mandrel can only the pretension chain in real work, after elongating, chain can not compensate automatically, and because slack list and pilled-in selvedge phenomenon can appear in the different chains of duty, therefore chain very easily comes off in roller groove after elongating, and causes mechanical breakdown.Spring is not set in mechanism in addition, can not absorbs and impact and the influence of vibration drill rig components.

Increased spring assembly at the minority feed mechanism,, failed to solve the problems such as when the chain elongation limit reaches, how to give warning in advance that feed though this mechanism has solved problems such as chain pretension, compensation, absorption impact.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of can not making to feed chain and form tangible slack list or pilled-in selvedge, minimizing fault formative factor, feed tensioning and early warning mechanism that the rig that can force early warning when chain elongates the limit feeds board-like chain.

According to technical scheme provided by the invention, described rig feeds the tensioning and the early warning mechanism of board-like chain, is included in the fixing mount pad in end of mast body, is rotatablely equipped with sprocket shaft on mount pad, is fixed with sprocket wheel on sprocket shaft; The head end that feeds chain links to each other with feed mechanism, feed the stage casing and the sprocket engagement of chain, be bolted with the adjusting screw mandrel in the end of mast body, the inner end of regulating screw mandrel is connected with the tail end that feeds chain, the outer end of regulating screw mandrel is bolted with adjusting nut, is socketed with stage clip on the adjusting screw mandrel between the end of adjusting nut and mast body.

On sprocket shaft, be installed with ratchet.Ratchet is installed on the mount pad, and an end of ratchet cooperates with described ratchet, and an end of ratchet cooperates with the outer end of described adjusting screw mandrel; Be fixed with limited post on mount pad, near the mount pad the outer end of regulating screw mandrel extension spring be installed, an end of extension spring is connected on the ratchet, and the other end of extension spring is connected on the mount pad, and extension spring strains ratchet and lean against on the limited post.

The present invention makes the rig can long time continuous working, and can give warning in advance and prevent mechanical breakdown, improves drilling efficiency and quality.

Description of drawings

Fig. 1 is an overall structure schematic diagram of the present invention.

The specific embodiment

The invention will be further described below in conjunction with concrete drawings and Examples.

As shown in the figure, this rig feeds the tensioning and the early warning mechanism of board-like chain, is included in the fixing mount pad 9 in end of mast body 1, is rotatablely equipped with sprocket shaft 10 on mount pad 9, is fixed with sprocket wheel 11 on sprocket shaft 10; The head end that feeds chain 2 links to each other with feed mechanism, feed the stage casing and sprocket wheel 11 engagements of chain 2, be bolted with adjusting screw mandrel 8 in the end of mast body 1, the inner end of regulating screw mandrel 8 is connected with the tail end that feeds chain 2, the outer end of regulating screw mandrel 8 is bolted with adjusting nut 6, is socketed with stage clip 7 on the adjusting screw mandrel 8 between the end of adjusting nut 8 and mast body 1.

On sprocket shaft 10, be installed with ratchet 3.Ratchet 4 is installed on the mount pad 9, and an end of ratchet 4 cooperates with described ratchet 3, and an end of ratchet 4 cooperates with the outer end of described adjusting screw mandrel 8; On mount pad 9, be fixed with limited post 12, on near the mount pad 9 the outer end of regulating screw mandrel 8, extension spring 5 is installed, one end of extension spring 5 is connected on the ratchet 4, and the other end of extension spring 5 is connected on the mount pad 9, and extension spring 5 strains ratchet 4 and lean against on the limited post 12.

During normal condition, the other end of extension spring 5 is connected on the mount pad 9, and extension spring 5 strains ratchet 4 and lean against on the limited post 12, and ratchet 4 does not mesh with ratchet 3; The outer end of regulating screw mandrel 8 does not contact with ratchet 4.Regulate spring force that screw mandrel 8 relies on stage clips 7 and will feed chain 2 and be in all the time under the proper state, promptly can not make to feed chain and form tangible slack list or pilled-in selvedge, reduce the fault formative factor.

Position when adjusting screw mandrel 8 compensates to the limit, at this moment, feed chain 2 and elongate the limit, the outer end of regulating screw mandrel 8 can promote ratchet 4 and rotate, make ratchet 4 and ratchet 3 engagements, with ratchet 3 braking, force the caution operator to feeding chain 2 and safeguard or changing, the contingency that reduces rig takes place.

Stage clip 7 can absorb rig in drilling process to feeding vibration and the impact that chain 2 produces, protect the rig workpiece better and creep into quality.Adjusting nut 6 satisfies the length compensation demand that feeds when being elongated after chain 2 is using certain hour in the position on the adjusting screw mandrel 8, satisfy the requirement of the continuous no-failure operation of rig.

Claims

1. a rig feeds the tensioning and the early warning mechanism of board-like chain, is included in the fixing mount pad (9) in end of mast body (1), is rotatablely equipped with sprocket shaft (10) on mount pad (9), is fixed with sprocket wheel (11) on sprocket shaft (10); The head end that feeds chain (2) links to each other with feed mechanism, feed the stage casing and sprocket wheel (11) engagement of chain (2), be bolted with adjusting screw mandrel (8) in the end of mast body (1), the inner end of regulating screw mandrel (8) is connected with the tail end that feeds chain (2), the outer end of regulating screw mandrel (8) is bolted with adjusting nut (6), it is characterized in that: be socketed with stage clip (7) on the adjusting screw mandrel (8) between the end of adjusting nut (8) and mast body (1).

2. rig as claimed in claim 1 feeds the tensioning and the early warning mechanism of board-like chain, it is characterized in that: be installed with ratchet (3) on sprocket shaft (10).

3. rig as claimed in claim 1 feeds the tensioning and the early warning mechanism of board-like chain, it is characterized in that: ratchet (4) is installed on the mount pad (9), one end of ratchet (4) cooperates with described ratchet (3), and an end of ratchet (4) cooperates with the outer end of described adjusting screw mandrel (8); On mount pad (9), be fixed with limited post (12), on near the mount pad (9) the outer end of regulating screw mandrel (8), extension spring (5) is installed, one end of extension spring (5) is connected on the ratchet (4), the other end of extension spring (5) is connected on the mount pad (9), and extension spring (5) is strained ratchet (4) and lean against on the limited post (12).