Novel steel bar binding tool

Abstract

The novel steel bar binding tool comprises an outer sleeve, a pull rod, a one-way bearing and a spring, an inner cavity is formed in the outer sleeve, a through hole is formed in the upper end of the outer sleeve, and a spiral guide groove is formed in the inner wall of the outer sleeve; the pull rod and the outer sleeve are coaxially arranged, a hook is arranged at the top of the pull rod, part of the pull rod is arranged in the outer sleeve, the other part of the pull rod extends out of the through hole, and the pull rod can stretch out and draw back in the outer sleeve in the axial direction. The one-way bearing is arranged at the bottom of the pull rod, an inner ring of the one-way bearing is fixedly connected with the pull rod, a spiral guide block is arranged on an outer ring of the one-way bearing and embedded in the guide groove, and the rotation direction of the one-way bearing is opposite to the rotation direction of the one-way bearing in the ascending process of the outer sleeve. The pull rod is sleeved with the spring and arranged between the top of an inner cavity of the outer sleeve and the one-way bearing, the pull rod rotates when reinforcing steel bars are bound, and the outer ring of the one-way bearing rotates while the pull rod does not rotate when the pull rod returns to the original position.

Description

Technical Field

[0001] The utility model relates to the technical field of construction tools, in particular to a novel steel bar binding tool. Background Art

[0002] During the construction process, the binding of steel bars is a huge main project. Steel bar binding is the use of steel wire to bind the interlaced steel bars to form a steel skeleton structure.

[0003] CN209025457U discloses a new type of hook, which includes a sleeve, a retractor and a spiral rod body. The rod body is arranged in the sleeve, and the retractor extends out of the sleeve; a spring is sleeved on the outer periphery of the rod body; a nut is mounted on the upper end of the sleeve, and grooves are evenly opened on the nut. Balls are arranged in the grooves, and a slope for the ball to slide is formed on one side of the groove.

[0004] During the use of this type of steel bar binding tool, foreign objects such as sand, dust, and pebbles can easily enter the interior of the tool through the spiral rod body, affecting the normal rolling of the ball or even damaging the ball. During use, the ball can also easily fall off from the limit position, causing the tool to be unable to be used normally. Therefore, the service life of the tool is relatively short. Utility Model Content

[0005] In order to solve the problem of short service life of the existing steel bar binding tools, the utility model provides a new steel bar binding tool, comprising:

[0006] An outer sleeve, wherein an inner cavity is provided in the outer sleeve, a through hole is provided at the upper end of the outer sleeve, and a spiral guide groove is provided on the inner wall of the outer sleeve;

[0007] A pull rod is coaxially arranged with the outer sleeve, a hook is provided on the top of the pull rod, a portion of the pull rod is disposed in the outer sleeve, and the other portion extends from the through hole, and the pull rod can telescopically move in the outer sleeve along the axial direction;

[0008] A one-way bearing, wherein the one-way bearing is arranged at the bottom of the pull rod, the inner ring of the one-way bearing is fixedly connected to the pull rod, the outer ring of the one-way bearing is provided with a spiral guide block, the guide block is embedded in the guide groove, and the rotation direction of the one-way bearing is opposite to the rotation direction of the one-way bearing during the rising process of the outer sleeve;

[0009] A spring is sleeved on the outer periphery of the pull rod and is arranged between the top of the inner cavity of the outer sleeve and the one-way bearing.

[0010] Specifically, the one-way bearing is a one-way needle roller bearing.

[0011] Specifically, the outer sleeve is a hollow tubular structure, and an upper sealing head and a lower sealing head are respectively provided at both ends of the outer sleeve. A through hole is provided in the upper sealing head, and the upper sealing head and the lower sealing head are threadedly connected to the outer sleeve.

[0012] Specifically, hexagonal protrusions are provided on the top of the upper plugging head and the bottom of the lower plugging head.

[0013] Specifically, a first limiting piece and a second limiting piece are provided at the bottom of the pull rod, and the one-way bearing is clamped between the first limiting piece and the second limiting piece.

[0014] Specifically, the first limiting piece is fixedly connected to the outer wall of the pull rod, and the second limiting piece is connected to the end of the pull rod through a bolt.

[0015] Specifically, a wedge block is provided on the outer wall of the pull rod between the first limiting piece and the second limiting piece, and a wedge groove matching the wedge block is provided on the inner ring of the one-way bearing, and the wedge block is embedded in the wedge groove.

[0016] Specifically, the outer wall of the outer sleeve is provided with a plastic sleeve

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The steel bar binding tool provided by the utility model uses a one-way bearing, and a spiral guide block is provided outside the one-way bearing, and a spiral guide groove is provided in the sleeve, so as to convert the linear motion of the outer sleeve in a single direction into the rotational motion of the pull rod, and rely on the one-way rotation characteristic of the one-way bearing to realize that the pull rod rotates during the stretching process and does not rotate during the returning process.

[0019] 2. The steel bar binding tool provided by the present invention does not require a screw as a pull rod, and the internal structure is a closed structure, which prevents foreign matter such as sand and dust from entering the tool through the screw thread, and can significantly improve the service life of the tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the assembly drawing of the utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0022] Figure 3 It is an enlarged view of the local structure of the utility model.

[0023] Figure numerals: 1. outer sleeve; 11. upper sealing head; 12. lower sealing head; 13. hexagonal protrusion; 14. guide groove; 15. plastic sleeve; 2. pull rod; 21. hook; 22. first limit plate; 23. second limit plate; 3. spring; 4. one-way bearing; 41. guide block. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. The specific implementation of the present invention is described in detail below in combination with specific embodiments.

[0025] The utility model provides a novel steel bar tying tool, comprising a coaxially arranged outer sleeve 1, a pull rod 2, a spring 3 and a one-way bearing 4. The rotation direction of the one-way bearing 4 is opposite to the rotation direction of the one-way bearing 4 during the rising process along the outer sleeve 1. The pull rod 2 rotates when tying the steel bars. When returning to its position, the outer ring of the one-way bearing 4 rotates while the pull rod 2 does not rotate.

[0026] The outer sleeve 1 is a hollow tube. The pull rod 2 is partially arranged in the outer sleeve 1, and the other part extends from the upper end of the outer sleeve 1. An upper plugging head 11 and a lower plugging head 12 are respectively provided at both ends of the outer sleeve 1. The upper plugging head 11 and the lower plugging head 12 are threadedly connected to the outer sleeve 1. A hexagonal protrusion 13 for tightening the plugging heads is provided at the top of the upper plugging head 11 and the bottom of the lower plugging head 12. A through hole is provided in the upper plugging head 11, and the aperture of the through hole matches the diameter of the pull rod 2. A hook 21 is provided at the top of the pull rod 2, and the top of the pull rod 2 extends out of the outer sleeve 1 from the through hole. The hook 21 is used to hook the binding point when binding the steel bars, and the steel bars are tied tightly with steel wire through the rotation of the pull rod 2. The pull rod 2 is a straight rod, rather than the screw-shaped pull rod commonly used in the prior art. This can prevent foreign matter such as sand and dust from entering the outer sleeve through the screw thread during use of the pull rod 2, thereby wearing out the internal structure of the tool and affecting the service life of the tool.

[0027] A first limiting plate 22, a second limiting plate 23, and a one-way bearing 4 clamped between the first limiting plate 22 and the second limiting plate 23 are provided at the bottom of the pull rod 2. The first limiting plate 22 is fixedly connected to the outer wall of the pull rod 2, and the second limiting plate 23 is provided at the end of the pull rod 2 and connected to the pull rod 2 by bolts. The one-way bearing 4 is preferably a one-way needle roller bearing. The inner and outer rings of the one-way bearing 4 can rotate freely in one direction and automatically lock when rotated in the other direction. The inner ring of the one-way bearing 4 is fixedly connected to the pull rod 2, and the outer ring is slidably connected to the outer sleeve 1. A wedge block is provided on the outer wall of the pull rod 2 between the first limiting plate 22 and the second limiting plate 23, and a wedge groove matching the wedge block is provided on the inner ring of the one-way bearing 4. The wedge block is embedded in the wedge groove, so that the pull rod 2 is fixedly connected to the inner ring of the one-way bearing 4. The outer ring of the one-way bearing 4 is provided with a plurality of spiral guide blocks 41 arranged in an array. The inner wall of the outer sleeve 1 is provided with a plurality of spiral guide grooves 14 that match the guide blocks 41. The guide blocks 41 are embedded in the guide grooves 14, guiding the movement of the outer ring of the one-way bearing 4. The rotation direction of the one-way bearing 4 is opposite to the rotation direction of the one-way bearing 4 during its ascent along the outer sleeve 1. The unidirectional rotation of the one-way bearing 4 enables the pull rod 2 to rotate during the extension process but not during the return process. A spring 3 is positioned between the first limit plate 22 and the top inner cavity of the outer sleeve 1. When the pull rod 2 is pulled out, the elasticity of the spring automatically causes the pull rod 2 to return to its original position.

[0028] A plastic sleeve 15 is provided on the outer wall of the outer sleeve 1 to prevent the outer sleeve 1 from slipping when being pulled.

[0029] When tightening the steel wire, hook the hook 21 onto the binding point, hold and pull the outer sleeve 1, the pull rod 2 drives the one-way bearing 4 to move upward, and the guide block 41 on the outer wall of the one-way bearing 4 rotates along the curvature of the guide groove 14. The one-way bearing 4 is stuck during the lifting process because the rotation direction of the guide groove 14 is opposite to the rotatable direction of the one-way bearing 4, and the one-way bearing 4 drives the pull rod 2 to rotate axially; after tightening the steel wire, the pull rod 2 automatically returns to its position under the action of the elastic force of the spring 3, and the guide block 41 on the outer wall of the one-way bearing 4 rotates in the opposite direction along the curvature of the guide groove 14. At this time, the rotation direction of the one-way bearing 4 is the same as the direction of the curvature of the guide groove 14. Therefore, the one-way bearing 4 can rotate normally during the descent process, while the pull rod 2 does not rotate during the return process. After the pull rod 2 returns to its position, the hook hooked in the steel wire can be removed.

[0030] The above description is merely a preferred embodiment of the present invention and does not constitute any limitation thereto. Any person skilled in the art may utilize the above disclosure to modify or remodel the present invention into equivalent embodiments. However, any simple modifications, equivalent variations, and modifications to the above embodiments that do not depart from the technical content of the present invention and are based on the technical essence of the present invention shall remain within the scope of protection of the present invention.

Claims

1. A new type of steel bar tying tool, characterized in that: include: An outer sleeve (1), wherein an inner cavity is provided in the outer sleeve (1), a through hole is provided at the upper end of the outer sleeve (1), and a spiral guide groove (14) is provided on the inner wall of the outer sleeve (1); A pull rod (2), the pull rod (2) is coaxially arranged with the outer sleeve (1), a hook (21) is provided on the top of the pull rod (2), a portion of the pull rod (2) is arranged in the outer sleeve (1), and the other portion extends from the through hole, and the pull rod (2) can move telescopically in the outer sleeve (1) along the axial direction; A one-way bearing (4), wherein the one-way bearing (4) is arranged at the bottom of the pull rod (2), the inner ring of the one-way bearing (4) is fixedly connected to the pull rod (2), the outer ring of the one-way bearing (4) is provided with a spiral guide block (41), the guide block (41) is embedded in the guide groove (14), and the rotation direction of the one-way bearing (4) is opposite to the rotation direction of the one-way bearing (4) during the ascending process along the outer sleeve (1); A spring (3) is sleeved on the outer periphery of the pull rod (2) and is arranged between the top of the inner cavity of the outer sleeve (1) and the one-way bearing (4).

2. The new steel bar tying tool according to claim 1 is characterized in that: The one-way bearing (4) is a one-way needle roller bearing.

3. The new steel bar tying tool according to claim 1 is characterized in that: The outer sleeve (1) is a hollow tubular structure, and an upper plugging head (11) and a lower plugging head (12) are respectively provided at both ends of the outer sleeve (1), a through hole is provided in the upper plugging head (11), and the upper plugging head (11) and the lower plugging head (12) are threadedly connected to the outer sleeve (1).

4. The new steel bar tying tool according to claim 3 is characterized in that: Hexagonal protrusions (13) are provided on the top of the upper plugging head (11) and the bottom of the lower plugging head (12).

5. The new steel bar tying tool according to claim 1 is characterized in that: A first limiting piece (22) and a second limiting piece (23) are provided at the bottom of the pull rod (2), and the one-way bearing (4) is clamped between the first limiting piece (22) and the second limiting piece (23).

6. The new steel bar tying tool according to claim 5, characterized in that: The first limiting piece (22) is fixedly connected to the outer wall of the pull rod (2), and the second limiting piece (23) is connected to the end of the pull rod (2) via bolts.

7. The new steel bar tying tool according to claim 5, characterized in that: Between the first limiting piece (22) and the second limiting piece (23), a wedge block is provided on the outer wall of the pull rod (2), and the inner ring of the one-way bearing (4) is provided with a wedge groove matching the wedge block, and the wedge block is embedded in the wedge groove.

8. The new steel bar tying tool according to claim 1 is characterized in that: The outer wall of the outer sleeve (1) is provided with a plastic sleeve (15).

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