A tension locking mechanism for steel bar tensioning equipment

Abstract

The present invention discloses a stretching and locking mechanism of a steel bar tensioning device, including a tensioning slider and a push-pull device for driving the tensioning slider to move laterally. The tensioning slider is provided with a screw rotary joint, and a first driven gear is provided outside the screw rotary joint. A first motor is provided on a mounting frame, and a first driving gear meshing with the first driven gear is provided on the driving shaft of the first motor; a nut rotary joint is provided outside the screw rotary joint, and the nut rotary joint can slide axially along the screw rotary joint and can also rotate radially along the screw rotary joint. A second motor is also provided on the mounting frame, and a second driving gear is provided on the driving shaft of the second motor. A second driven gear with a larger tooth width than the second driving gear and meshing with the second driving gear is provided outside the nut rotary joint. The present invention utilizes a screw rotary joint to connect a stretching screw, stretches it through a push-pull device, and then the nut rotary joint is used to screw a locking nut, thereby realizing the automatic stretching and locking of the steel bar.

Description

Technical Field

[0001] The invention relates to the field of sleeper production equipment, and in particular to a stretching and locking mechanism of a steel bar tensioning equipment. Background Art

[0002] In the production of sleepers, the tensioning of steel bars can form a prestressed structure. Prestressing can improve the tensile strength of concrete when it is subjected to loads, prevent or delay the appearance of cracks, and increase the rigidity and stiffness of the structure. At present, the tensioning of sleeper steel bars is basically assisted by manual labor, such as steel bar fixing, stretching, nut locking, etc., which is time-consuming and labor-intensive, and has a low degree of automation. Based on this, the applicant proposes an automated sleeper steel bar tensioning device. In order to realize the automated stretching and locking of steel bars, the applicant also proposes a stretching and locking mechanism for the steel bar tensioning device. Summary of the invention

[0003] The purpose of the present invention is to provide a stretching and locking mechanism for a steel bar tensioning device, which can realize automatic stretching and locking of steel bars.

[0004] To achieve the above-mentioned purpose, the technical solution of the present invention is: a stretching locking mechanism of a steel bar tensioning equipment, comprising a tensioning slider, a push-pull device for driving the tensioning slider to move laterally is connected to the back of the tensioning slider, a screw rotary joint is arranged along the moving direction of the tensioning slider on the front, a first driven gear is arranged outside the screw rotary joint, a mounting frame is also provided on the tensioning slider, a first motor is arranged on the mounting frame, a first driving gear is arranged on the driving shaft of the first motor, the first driving gear is meshed with the first driven gear, when the first motor is working, the first driving gear cooperates with the first driven gear to drive the screw rotary joint to rotate, connect the screw rotary joint with the tensioning screw in contact with it, or connect the screw rotary joint with the tensioning screw in contact with it. The connected screw rotary joint withdraws; a nut rotary joint is sleeved on the outside of the screw rotary joint, the nut rotary joint can slide axially along the screw rotary joint, and can also rotate radially along the screw rotary joint. A second motor is also provided on the mounting frame, and a second driving gear is provided on the driving shaft of the second motor. A second driven gear with a tooth width greater than the second driving gear is provided on the outside of the nut rotary joint, and the second driven gear is meshed with the second driving gear. When the second motor is working, the second driving gear cooperates with the second driven gear to drive the nut rotary joint to rotate, and the nut rotary joint also slides axially along the screw rotary joint while rotating, and the locking nut embedded in the nut rotary joint is tightened to the outer wall of the steel bar tensioning slideway.

[0005] As a preferred embodiment of the present invention, the push-pull device is a telescopic oil cylinder.

[0006] As a preferred embodiment of the present invention, a self-lubricating bearing is provided between the nut rotary joint and the screw rotary joint.

[0007] As a preferred solution of the present invention, the mounting frame is further provided with a limiting member for preventing the nut rotary joint from falling off from the screw rotary joint.

[0008] The beneficial effects of the present invention are as follows: the present invention utilizes a screw rotating joint to connect a stretching screw, stretches it through a push-pull device, and then screws a locking nut through a nut rotating joint, thereby realizing automatic stretching and locking of the steel bar. The present invention has a simple structure, a reasonable and effective design, and can improve the degree of automation of steel bar stretching. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of the present invention;

[0010] Figure 2 It is a cross-sectional view of the present invention. DETAILED DESCRIPTION

[0011] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings.

[0012] like Figure 1-2 As shown, a stretching locking mechanism of a steel bar tensioning device comprises a tensioning slider 1, a push-pull device 2 for driving the tensioning slider 1 to move laterally is connected to the back of the tensioning slider 1, the push-pull device 2 is preferably a telescopic cylinder, a screw rotary joint 3 arranged along its moving direction is arranged on the front of the tensioning slider 1, a first driven gear 4 is arranged outside the screw rotary joint 3, a mounting frame 5 is also arranged on the tensioning slider 1, a first motor 6 is arranged on the mounting frame 5, a first driving gear 7 is arranged on the driving shaft of the first motor 6, the first driving gear 7 is meshed with the first driven gear 4, when the first motor 6 is working, the first driving gear 7 cooperates with the first driven gear 4 to drive the screw rotary joint 3 to rotate, connect the screw rotary joint 3 and the tensioning screw 8 in contact therewith, or withdraw the screw rotary joint 3 connected to the tensioning screw 8; the outer sleeve of the screw rotary joint 3 A nut rotary joint 9 is installed, and a self-lubricating bearing 10 is provided between the nut rotary joint 9 and the screw rotary joint 3. The nut rotary joint 9 can slide axially along the screw rotary joint 3, and can also rotate radially along the screw rotary joint 3. A second motor 11 is also provided on the mounting frame 5, and a second driving gear 12 is provided on the driving shaft of the second motor 11. A second driven gear 13 with a tooth width greater than the second driving gear 12 is provided outside the nut rotary joint 9, and the second driven gear 13 is meshed with the second driving gear 12. When the second motor 11 is working, the second driving gear 12 cooperates with the second driven gear 13 to drive the nut rotary joint 9 to rotate. The nut rotary joint 9 also slides axially along the screw rotary joint 3 while rotating, and the locking nut 14 embedded in the nut rotary joint 9 is tightened to the outer wall of the steel bar tensioning slideway 15.

[0013] As a preferred solution of the present invention, the mounting frame 5 is further provided with a limiting member (not shown in the figure) for preventing the nut rotary joint 9 from falling off from the screw rotary joint 3 .

[0014] The invention utilizes a screw rotating joint to connect a stretching screw, stretches it through a push-pull device, and then screws a locking nut through a nut rotating joint, thereby realizing automatic stretching and locking of the steel bar. The invention has a simple structure, reasonable and effective design, and can improve the degree of automation of steel bar stretching.

[0015] The described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A tension locking mechanism for a steel bar tensioning device, characterized in that: The tensioning slider comprises a push-pull device for driving the tensioning slider to move laterally connected to the back thereof, a screw rotating joint arranged along the moving direction thereof is arranged on the front of the tensioning slider, a first driven gear is arranged outside the screw rotating joint, a mounting frame is also arranged on the tensioning slider, a first motor is arranged on the mounting frame, a first driving gear is arranged on the driving shaft of the first motor, the first driving gear is meshed with the first driven gear, when the first motor is working, the first driving gear cooperates with the first driven gear to drive the screw rotating joint to rotate, connect the screw rotating joint with the tensioning screw in contact therewith, or withdraw the screw rotating joint connected with the tensioning screw; the screw rotating joint A nut rotary joint is sleeved on the outer sleeve of the head, and the nut rotary joint can slide axially along the screw rotary joint, and can also rotate radially along the screw rotary joint. A second motor is also provided on the mounting frame, and a second driving gear is provided on the driving shaft of the second motor. A second driven gear with a tooth width greater than the second driving gear is provided on the outer sleeve of the nut rotary joint, and the second driven gear is meshed with the second driving gear. When the second motor is working, the second driving gear cooperates with the second driven gear to drive the nut rotary joint to rotate. While the nut rotary joint rotates, it also slides axially along the screw rotary joint, and the locking nut embedded in the nut rotary joint is tightened to the outer wall of the steel bar tensioning slideway; The push-pull device is a telescopic cylinder; A self-lubricating bearing is provided between the nut rotary joint and the screw rotary joint; The mounting frame is also provided with a limiting piece for preventing the nut rotary joint from falling off from the screw rotary joint.

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