Automatic reset stretcher

Abstract

The utility model provides an automatic reset stretcher which comprises a stretcher body, the stretcher body comprises a cylinder body, a nut shifting ring and a thread stretching head, the outer wall of the nut shifting ring is sleeved with the cylinder body, the thread stretching head is arranged in the cylinder body, an upward jacking mechanism is arranged in the cylinder body, two rectangular rods are slidably connected into the thread stretching head, and the two rectangular rods are arranged in the cylinder body. A sliding rod is fixedly mounted at the top of the rectangular rod, a first connecting piece is fixedly mounted at the top of the sliding rod, a second connecting piece is hinged to the first connecting piece, a rotating rod is fixedly mounted on the second connecting piece, and a rubber block is fixedly mounted at the top of the rotating rod; when the pulling rod is taken down after being used, the threaded stretching head can be taken down through the rotating rod of the pulling rod, so that the pulling rod can be conveniently operated even in a narrow space environment, and the problem that in the prior art, when the space is narrow, a pulling rod needs to be repeatedly pulled and inserted, and rotation is carried out point by point, which is troublesome is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automatic reset stretcher, specifically, relate to automatic reset stretcher. BACKGROUND

[0002] The hydraulic stretcher is the advanced bolt pre-tightening and dismounting tool in the world, the hydraulic bolt stretcher is widely used for pre-tightening of large diameter bolts with simple product operation, convenient use, high safety and the like.

[0003] The stretcher needs to take down the threaded stretching head at the top first after stretching the bolt, and then take down other components, in the prior art, the threaded stretching head is taken down by inserting a poking stick into the threaded stretching head, then rotating the poking stick to drive the threaded stretching head to rotate, and then taking it down, but in actual use, the poking stick is not convenient to rotate or can only rotate a little bit due to narrow space, so it is necessary to repeatedly insert and pull out the poking stick and rotate a little bit at a time to take out the threaded stretching head, which is very inconvenient to use.

[0004] Therefore, the utility model improves the prior art and provides an automatic reset stretcher. CONTENT OF THE UTILITY MODEL

[0005] The utility model discloses an automatic reset stretcher to improve the above problems.

[0006] In order to realize the above-mentioned utility model purposes, the utility model provides the following technical scheme:

[0007] The automatic reset stretcher is used to improve the above problems.

[0008] The application is as follows:

[0009] Including the stretcher body, the stretcher body includes the cylinder, the nut dial ring and the threaded stretching head, the cylinder is sleeved on the outer wall of the nut dial ring, the threaded stretching head is arranged in the cylinder, the cylinder is provided with the upper top mechanism, the threaded stretching head is slidably connected with two rectangular rods, the top of the rectangular rod is fixedly installed with the slide rod, the top of the slide rod is fixedly installed with the first connecting piece, the second connecting piece is hinged on the first connecting piece, the rotating rod is fixedly installed on the second connecting piece, and the rubber block is fixedly installed on the top of the rotating rod.

[0010] As a preferred technical scheme of the application, the upper top mechanism includes an upper top ring slidably connected in the cylinder, and the upper top ring is fixedly installed with an upper top column at the top.

[0011] As a preferred technical scheme of the application, the upper top ring is uniformly fixedly installed with a spring at the top, and the other end of the spring is fixedly connected with the cylinder.

[0012] As a preferred technical scheme of the application, the cylinder is provided with a flow guide hole.

[0013] As a preferred technical scheme of the application, the outer wall of the cylinder is provided with an oil injection joint corresponding to the flow guide hole.

[0014] As a preferred technical scheme of the application, the outer wall of the nut dial ring is uniformly provided with a slot.

[0015] As a preferred technical scheme of the application, the inner wall and the outer wall of the upper top ring are both provided with a sealing ring.

[0016] Compared with the prior art, the application has the following beneficial effects:

[0017] In the scheme of the application:

[0018] 1. The rubber block drives the rotating rod to move upwards, the rotating rod drives the second connecting piece, the second connecting piece drives the first connecting piece, the first connecting piece drives the slide rod, and the slide rod drives the rectangular rod to slide upwards, so that the rotating rod moves out of the threaded stretching head, then the rotating rod is folded, and finally the threaded stretching head is driven to rotate by rotating the rotating rod, so that the threaded stretching head is detached from the bolt, and then the cylinder and the nut dial ring are removed; when the stretcher is removed after use, the threaded stretching head can be removed through the self-provided rotating rod, so that the operation is convenient even in a narrow space, and the problem that the existing technology needs to be repeatedly pulled out and inserted and rotated little by little when the space is narrow is solved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The structure diagram of the automatic reset stretcher provided by the application is shown in the figure.

[0020] Figure 2The cross-section exploded structure schematic diagram of the automatic reset stretcher provided in the application is shown in the figure.

[0021] Figure 3 The cross-section structure schematic diagram of the automatic reset stretcher provided in the application is shown in the figure.

[0022] Figure 4 The cross-section structure schematic diagram of the threaded stretching head of the automatic reset stretcher provided in the application is shown in the figure.

[0023] Figure 5 The structure schematic diagram of the rectangular rod, sliding rod, first connecting piece, second connecting piece, rotating rod and rubber block of the automatic reset stretcher provided in the application is shown in the figure.

[0024] Figure 6 The top cross-section structure schematic diagram of the cylinder body of the automatic reset stretcher provided in the application is shown in the figure.

[0025] Figure 7 The structure schematic diagram of the sealing ring, upper top ring, upper top column and spring of the automatic reset stretcher provided in the application is shown in the figure.

[0026] Indicated in the figure:

[0027] 111, stretcher body; 1, cylinder body; 2, nut ring; 3, threaded stretching head; 4, rectangular rod; 5, sliding rod; 6, first connecting piece; 7, second connecting piece; 8, rotating rod; 9, rubber block; 10, sealing ring; 11, upper top ring; 12, upper top column; 13, spring; 14, flow guide hole; 15, oil injection joint; 16, insertion slot. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0029] Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed present application, but only represents some embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0030] It should be noted that the embodiments in the present application and the features and technical schemes in the embodiments can be combined with each other without conflict.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Example:

[0034] like Figures 1-7 As shown, this embodiment proposes an automatic reset tensioner, including a tensioner body 111. The tensioner body 111 includes a cylinder 1, a nut ring 2, and a threaded tensioning head 3. The cylinder 1 is sleeved on the outer wall of the nut ring 2, and the threaded tensioning head 3 is disposed inside the cylinder 1. An upper lifting mechanism is provided inside the cylinder 1. Two rectangular rods 4 are slidably connected inside the threaded tensioning head 3. A slide rod 5 is fixedly installed on the top of the rectangular rod 4, and a first connecting member 6 is fixedly installed on the top of the slide rod 5. A second connecting member 7 is hinged to the first connecting member 6, and a rotating rod 8 is fixedly installed on the second connecting member 7. The threaded tensioning head 3 can be rotated by rotating the rotating rod 8, causing the threaded tensioning head 3 to disengage from the bolt, and then the cylinder 1 and the nut ring 2 can be removed. When removing the device after use, the threaded tensioning head 3 can be removed by the built-in rotating rod 8. This allows for convenient operation even in confined spaces, solving the problem in the prior art where, in confined spaces, it is necessary to repeatedly insert and remove the lever to rotate the device little by little, which is quite troublesome.

[0035] A rubber block 9 is fixedly installed on the top of the rotating rod 8. When the tensioner needs to be removed after the bolts are tightened, the rubber block 9 is pulled first. The rubber block 9 drives the rotating rod 8 to move upward. The rotating rod 8 drives the second connecting piece 7. The second connecting piece 7 drives the first connecting piece 6. The first connecting piece 6 drives the sliding rod 5. The sliding rod 5 drives the rectangular rod 4 to slide upward, so that the rotating rod 8 moves out of the threaded tensioning head 3.

[0036] The upper lifting mechanism includes an upper lifting ring 11 that is slidably connected inside the cylinder body 1. An upper lifting column 12 is fixedly installed on the top of the upper lifting ring 11. After oil is injected, the upper lifting ring 11 moves upward and pushes the upper lifting column 12 upward.

[0037] In order to reset the upper top ring 11, a spring 13 is fixedly installed on the top of the upper top ring 11, and the other end of the spring 13 is fixedly connected with the cylinder body 1.

[0038] A flow guide hole 14 is formed in the cylinder body 1.

[0039] An oil injection joint 15 is arranged on the outer wall of the cylinder body 1, and the oil injection joint 15 corresponds to the flow guide hole 14. An oil injection pipe of an external oil injection device is connected with the oil injection joint 15. After oil injection, the upper top ring 11 moves upward and pushes the upper top column 12 to move upward.

[0040] A plurality of insertion grooves 16 are uniformly formed on the outer wall of the nut wrench 2, so as to facilitate the fastening of the bolt.

[0041] Sealing rings 10 are arranged on the inner wall and the outer wall of the upper top ring 11, so as to improve the sealing effect.

[0042] Specifically, when the automatic reset stretcher is used, the nut wrench 2 is first sleeved on the nut, then the cylinder body 1 is sleeved on the nut wrench 2, then the threaded stretching head 3 is threadedly connected on the screw rod, then the oil injection pipe of the external oil injection device is connected with the oil injection joint 15. After oil injection, the upper top ring 11 moves upward and pushes the upper top column 12 to move upward. The upper top column 12 pushes the threaded stretching head 3 to move upward, so that the threaded stretching head 3 stretches the bolt. Then the nut can be fastened. After fastening, the oil injection pipe is first removed. At this time, the pressure is lost, and the spring 13 rebounds, so that the upper top ring 11 resets. When the nut wrench 2 is removed, the rubber block 9 is pulled, the rubber block 9 drives the rotating rod 8 to move upward, the rotating rod 8 drives the second connecting piece 7, the second connecting piece 7 drives the first connecting piece 6, the first connecting piece 6 drives the sliding rod 5, the sliding rod 5 drives the rectangular rod 4 to slide upward, so that the rotating rod 8 moves out of the threaded stretching head 3. Then the rotating rod 8 is folded. Finally, the threaded stretching head 3 is rotated by rotating the rotating rod 8, so that the threaded stretching head 3 is separated from the bolt. Then the cylinder body 1 and the nut wrench 2 are removed. When the nut wrench 2 is removed, the threaded stretching head 3 can be removed through the rotating rod 8. Therefore, even in a narrow space, the threaded stretching head 3 can be conveniently operated, and the problem that the existing technology needs to be repeatedly pulled out and inserted and rotated little by little when the space is narrow is solved.

[0043] All the technical features in the embodiment can be freely combined according to actual needs.

[0044] The above embodiment is a preferred implementation scheme of the utility model. In addition, the utility model can be implemented in other ways without departing from the technical scheme concept. Any obvious replacement within the scope of the utility model is within the protection scope of the utility model.

Claims

1. An automatic reset stretcher comprising a stretcher body (111), the stretcher body (111) comprising a cylinder (1), a nut ring (2) and a threaded stretching head (3), the cylinder (1) being sleeved on the outer wall of the nut ring (2), the threaded stretching head (3) being arranged in the cylinder (1), and an upper top mechanism being arranged in the cylinder (1), characterized in that, The threaded stretching head (3) is slidably connected with two rectangular rods (4), the top of the rectangular rod (4) is fixedly installed with a sliding rod (5), the top of the sliding rod (5) is fixedly installed with a first connecting piece (6), the first connecting piece (6) is hingedly connected with a second connecting piece (7), the second connecting piece (7) is fixedly installed with a rotating rod (8), and the top of the rotating rod (8) is fixedly installed with a rubber block (9).

2. The self-resetting tensioner of claim 1, wherein, The upper ejecting mechanism comprises an upper ejecting ring (11) slidably connected in a cylinder body (1), and the top of the upper ejecting ring (11) is fixedly installed with an upper ejecting column (12).

3. The self-resetting tensioner of claim 2, wherein, The top of the upper ejecting ring (11) is uniformly fixedly installed with a spring (13), and the other end of the spring (13) is fixedly connected with the cylinder body (1).

4. The self-resetting tensioner of claim 3, wherein, The cylinder body (1) is provided with a flow guide hole (14).

5. The self-resetting tensioner of claim 4, wherein, The outer wall of the cylinder body (1) is provided with an oil injection joint (15) corresponding to the flow guide hole (14).

6. The self-resetting tensioner of claim 1, wherein, The outer wall of the nut dial ring (2) is uniformly provided with a slot (16).

7. The self-resetting tensioner of claim 2, wherein, The inner wall and the outer wall of the upper ejecting ring (11) are both provided with a sealing ring (10).

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