Sleeve of traction bolt

Abstract

The invention discloses a sleeve of a traction bolt, and relates to the technical field of bolt sleeves, the sleeve comprises a bolt and a sleeve which sleeves the head of the bolt and is used for rotating and pulling the bolt, the lower end of the sleeve is provided with a sleeve cavity extending upwards from the lower end face of a sleeve body, and a telescopic column is arranged in the cavity wall of the sleeve cavity; the column head of the telescopic column extends into the sleeve cavity from the cavity wall; the bolt comprises a stud and a stud head arranged at one end of the stud, and a groove allowing the stud head of the telescopic column to be clamped in is formed in the position, corresponding to the telescopic column, of the outer side face of the stud head. When the bolt is screwed out, the bolt can be dragged, it is ensured that the bolt is screwed out along with the sleeve, after the bolt reaches a limited position, the bolt does not continue to move, and at the moment, the sleeve can continue to retreat; and the opening work of the end mold of the mold is prevented from being influenced because the bolt is not completely withdrawn and reaches a limiting position.

Description

Technical Field

[0001] This invention relates to the field of bolt sleeve technology, and more specifically to a sleeve for a traction bolt. Background Technology

[0002] With economic development, labor costs are rising. Currently, many processes in factories that were originally operated manually are now being completed by machines to save on labor costs. For example, the installation of the flange on the sixth axis of an industrial robot is achieved by an automatic bolt loosening mechanism. This automatic loosening mechanism has a bolt sleeve installed at its end. The sleeve can be matched with the end of the fastening bolt (hexagonal head bolt) on the side mold of the segment mold. In use, when the bolt is loosened with the sleeve, if the bolt is continued to be rotated, it will only spin freely after it is disengaged from the nut and will not be unscrewed. If the sleeve retracts with the loosening mechanism and disengages from the bolt, the bolt will be pulled a certain distance due to friction. However, as the degree of disengagement increases, the contact area decreases, and the friction also decreases. The bolt cannot be completely withdrawn with the sleeve. If the bolt is not completely withdrawn and reaches the limit position, it will affect the opening of the mold end mold. Summary of the Invention

[0003] The purpose of this invention is to provide a sleeve for a traction bolt, which can pull the bolt when it is unscrewed, ensuring that it unscrews along with the sleeve. When the bolt reaches the limit position, the bolt stops moving, and the sleeve can continue to retract. This prevents the opening of the mold end mold from being affected by the bolt not being fully retracted and reaching the limit position.

[0004] The present invention includes a bolt and a sleeve fitted onto the head of the bolt for rotating and pulling the bolt. The lower end of the sleeve is provided with a sleeve cavity extending upward from the bottom surface of the sleeve. A telescopic post is provided on the cavity wall of the sleeve cavity, and the post head of the telescopic post extends from the cavity wall into the sleeve cavity. The bolt includes a stud and a stud head provided at one end of the stud. On the outer side of the stud head, a groove is provided at the corresponding position of the telescopic post for the post head of the telescopic post to be engaged.

[0005] Preferably, the sleeve cavity has a receiving cavity on its wall to accommodate the telescopic column, and the column body of the telescopic column is disposed in the receiving cavity.

[0006] Preferably, the outer end of the telescopic column is connected to an elastic element, and the outer end of the elastic element is connected to a limiting plate, which rests against the cavity wall of the receiving cavity.

[0007] Preferably, the head of the telescopic column is spherical, and the shape of the groove on the outer surface of the stud head matches the outer contour of the head.

[0008] Preferably, there are several telescopic columns, which are evenly distributed on the cavity wall of the sleeve cavity.

[0009] Preferably, the size of the sleeve cavity is adapted to the external dimensions of the stud head.

[0010] Preferably, the bolt head is hexagonal in shape, and each side of the bolt head has at least two grooves.

[0011] Preferably, the telescopic column is perpendicular to the side of the bolt head.

[0012] In summary, the present invention has the following beneficial effects:

[0013] A telescopic column is added to the sleeve, which is held in place by an elastic element and can extend or retract moderately. Simultaneously, a groove is machined on the side of the bolt's stud head to accommodate the telescopic column. When the bolt enters a certain depth into the sleeve cavity, the stud head of the telescopic column falls into the groove. As the bolt is loosened with the sleeve, the sleeve retracts linearly, and the traction bolt also retracts simultaneously, preventing easy separation. When the bolt reaches its limit position, it is blocked by a limiting device, preventing further movement. At this point, the sleeve can continue to retract, and after the stud head of the telescopic column disengages from the groove on the bolt, the sleeve can completely separate from the bolt. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a sleeve for a traction bolt according to the present invention;

[0015] Figure 2 This is a breakdown diagram of the bolt and sleeve.

[0016] Figure 3 This is a schematic diagram of the internal structure of the sleeve (with bolts removed);

[0017] Figure 4 This is a schematic diagram of the internal structure of the sleeve (including bolts).

[0018] In the diagram: 1. Bolt; 101. Stud; 102. Stud head; 103. Groove; 2. Sleeve; 3. Sleeve cavity; 4. Telescopic post; 5. Post head; 6. Receiving cavity; 7. Elastic element; 8. Limiting plate. Detailed Implementation

[0019] The invention will now be further described with reference to the accompanying drawings.

[0020] The orientations mentioned in this specification are based on the orientation of the sleeve of the traction bolt of the present invention during normal operation, and do not limit the orientation during storage and transportation. They only represent relative positional relationships and do not represent absolute positional relationships.

[0021] like Figures 1 to 4As shown, a sleeve for a traction bolt includes a bolt 1 and a sleeve 2 fitted onto the head of the bolt 1 for rotating and traction of the bolt 1. The lower end of the sleeve 2 is provided with a sleeve cavity 3 extending upward from the bottom surface of the sleeve 2. A telescopic post 4 is provided on the cavity wall of the sleeve cavity 3, and the post head 5 of the telescopic post 4 extends from the cavity wall into the sleeve cavity 3. The bolt 1 includes a stud 101 and a stud head 102 provided at one end of the stud 101. The bolt 1 is provided with threads for connection with other equipment. On the outer side of the stud head 102, a groove 103 is provided at the corresponding position of the telescopic post 4 for the post head 5 of the telescopic post 4 to be engaged.

[0022] Furthermore, the sleeve cavity 3 is provided with a receiving cavity 6 on its cavity wall to accommodate the telescopic column 4, and the column body of the telescopic column 4 is disposed in the receiving cavity 6; an elastic element 7 is connected to the outer end of the column body of the telescopic column 4, and a limiting plate 8 is connected to the outer end of the elastic element 7. The limiting plate 8 abuts against the cavity wall of the receiving cavity 6, and the elastic element 7 allows the telescopic column 4 to extend and retract back and forth in the receiving cavity 6 to achieve the locking or loosening of the sleeve 2 and the bolt 1.

[0023] Furthermore, the head 5 of the telescopic column 4 is spherical, and the shape of the groove 103 on the outer side of the stud head 102 matches the outline of the head 5, making it easy for the head 5 to be inserted.

[0024] Furthermore, several telescopic columns 4 are provided and are evenly arranged on the cavity wall of the sleeve cavity 3. In this embodiment, the sleeve 2 is circular, and the telescopic columns 4 are arranged in a circular array around the sleeve cavity 3, so that the clamping force on the bolt 1 is more uniform.

[0025] Furthermore, the size of the sleeve cavity 3 is adapted to the external dimensions of the stud head 102, facilitating connection with the stud head 102.

[0026] Furthermore, in this embodiment, the bolt head 1 is a regular hexagonal shape, and each side of the bolt head 1 is provided with no less than two grooves 103 to facilitate the connection of the column head 5 of the telescopic column 4 with it; in other embodiments, the bolt head 1 may also be other shapes as needed.

[0027] When the bolt head 1 is a regular hexagon, the telescopic column 4 is perpendicular to the side of the bolt head 1, making the clamping of the bolt head 1 by the column head 5 of the telescopic column 4 more stable.

[0028] In use, a telescopic column 4 is added to the sleeve 2. The exposed end of the telescopic column 4 is spherical. The telescopic column 4 is pressed by the elastic element 7 and can extend and retract appropriately. At the same time, a groove 103 for cooperating with the telescopic column 4 is machined on the side of the stud head 102 of the bolt 1. When the bolt 1 enters into the sleeve cavity 3 to a certain depth, the stud head 5 of the telescopic column 4 can fall into the groove 103. When the bolt 1 is loosened with the sleeve 2, the sleeve 2 exits linearly, and the traction bolt 1 also exits together. The two will not easily separate. When the bolt 1 reaches the limit, the bolt 1 will no longer move due to the obstruction of the limit device. At this time, the sleeve 2 can continue to exit. After the stud head 5 of the telescopic column 4 disengages from the groove 103 on the bolt 1, the sleeve 2 can be completely separated from the bolt 1.

[0029] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A sleeve for a traction bolt, characterized in that: The device includes a bolt (1) and a sleeve (2) fitted onto the head of the bolt (1) for rotating and pulling the bolt (1). The lower end of the sleeve (2) is provided with a sleeve cavity (3) extending upward from the bottom surface of the sleeve (2). A telescopic post (4) is provided on the cavity wall of the sleeve cavity (3). The head (5) of the telescopic post (4) extends from the cavity wall into the sleeve cavity (3). The bolt (1) includes a stud (101) and a stud head (102) provided at one end of the stud (101). On the outer side of the stud head (102), a groove (103) is provided at the corresponding position of the telescopic post (4) for the head (5) of the telescopic post (4) to be inserted.

2. The sleeve for a traction bolt as described in claim 1, characterized in that: The sleeve cavity (3) has a cavity (6) on its cavity wall for accommodating the telescopic column (4), and the column body of the telescopic column (4) is disposed in the cavity (6).

3. The sleeve for a traction bolt as described in claim 2, characterized in that: The outer end of the telescopic column (4) is connected to an elastic element (7), and the outer end of the elastic element (7) is connected to a limiting plate (8), which abuts against the cavity wall of the receiving cavity (6).

4. The sleeve for a traction bolt as described in claim 1, characterized in that: The head (5) of the telescopic column (4) is spherical, and the shape of the groove (103) on the outer side of the stud head (102) matches the outline of the head (5).

5. The sleeve for a traction bolt as described in claim 1, characterized in that: The telescopic column (4) is provided in several parts and is evenly arranged on the cavity wall of the sleeve cavity (3).

6. The sleeve for a traction bolt as described in claim 1, characterized in that: The size of the sleeve cavity (3) is adapted to the external dimensions of the stud head (102).

7. The sleeve for a traction bolt as described in claim 1, characterized in that: The bolt (1) head is hexagonal in shape, and each side of the bolt (1) head is provided with not less than two grooves (103).

8. The sleeve for a traction bolt as described in claim 7, characterized in that: The telescopic column (4) is perpendicular to the side of the bolt head (1).

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