CN216180097U - Screw up stock - Google Patents

Abstract

The utility model provides a tightening gun handle which can prolong the service life and reduce the maintenance cost. The tightening gun handle includes: a guide sleeve; a tightening gun head having a tightening end portion on a front side for tightening a bolt and a tightening end portion on a rear side; an extension link having a front portion detachably fastened to and integrated with the fastening end portion of the screw gun head, and a rear portion connected to the guide sleeve; and the spring is abutted between the guide sleeve and the lengthened connecting rod.

Description

Screw up stock

Technical Field

The present invention relates to a tightening gun handle, and more particularly, to a tightening gun handle having a tightening gun head inside.

Background

Conventionally, a tightening gun has been widely used in the technical field of automatic tightening and the like. In general, a tightening handle is connected to a gun shaft of a tightening gun, and a tightening end (tightening head) of the tightening gun head in the tightening handle is fitted into a groove portion of a fastener such as a screw or a bolt and tightened to connect members.

However, in the conventional tightening gun handle, the tightening tip has a long dimension in the axial direction, and if the tightening tip and the fastener such as a bolt in the tightening gun handle are displaced in the axial direction during use, a portion of the tightening tip that is farther from the tightening end is more likely to receive a large moment and more likely to cause a phenomenon of shaft breakage due to the tightening force generated by fitting the tightening end of the tightening tip and the fastener such as the bolt, and particularly, the risk of shaft breakage of the tightening tip increases as the tightening target moment increases. For example, when a tightening gun handle having a conventional tightening gun head is used for fastening an engine cylinder head, if the tightening gun head is broken during use and falls into the engine, there is a possibility that a risk of cylinder explosion or the like occurs.

In addition, in the case where a screw-down tip having a specific length and size as a non-standard member is required to be used according to actual needs of a work site, the screw-down tip needs to be customized as needed, and the manufacturing process is complicated and the procurement period is long.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a tightening gun handle which can prolong the service life and reduce the maintenance cost.

In order to achieve the above object, the present invention provides a tightening gun handle comprising: a guide sleeve; a tightening gun head having a tightening end portion on a front side for tightening a bolt and a tightening end portion on a rear side; an extension link having a front portion detachably fastened to and integrated with the fastening end portion of the screw gun head, and a rear portion connected to the guide sleeve; and the spring is abutted between the guide sleeve and the lengthened connecting rod.

In the tightening gun handle according to the present invention, a port groove may be formed in the front portion, and the fastening end portion of the tightening gun head may be inserted into the port groove to fasten the tightening gun head.

In the tightening gun handle according to the present invention, a first through hole may be formed in a circumferential surface of the front portion of the extension link, a groove may be formed in a circumferential surface of the fastening end portion of the tightening gun head, and the positioning pin may pass through the first through hole and abut against the groove in a state where the fastening end portion of the tightening gun head is inserted into the port groove.

In the tightening gun handle according to the present invention, the port groove of the extension link may have an internal thread, the fastening end portion of the tightening gun head may have an external thread, and the front side portion of the extension link may be screwed to the fastening end portion of the tightening gun head.

In the tightening gun handle according to the present invention, the tightening gun head may be coaxial with the elongated link in a state where the tightening end portion of the tightening gun head is inserted into the port groove.

In the screw-down pistol grip according to the utility model, it is also possible for the screw-down pistol head to be a standard part.

In the tightening gun handle of the present invention, the length of the tightening gun head in the axial direction may be in the range of 20mm to 70 mm.

In the tightening gun handle according to the present invention, a second through hole may be formed in a circumferential surface of the rear portion of the extension link, a third through hole may be correspondingly formed in a circumferential surface of the second portion of the guide sleeve, and a positioning pin may pass through the second through hole and the third through hole.

In the tightening gun handle according to the present invention, the second through hole and the third through hole may have different sizes in the axial direction of the guide sleeve.

According to the tightening gun handle of the present invention, since the tightening gun head in the tightening gun handle is detachably connected to the guide sleeve via the extension link, the length dimension of the tightening gun head in the axial direction can be significantly reduced as compared with a conventional tightening gun head, and therefore, when the tightening gun head is displaced in the axial direction from a fastener such as a bolt during use, the moment applied to the portion of the tightening gun head away from the tightening end can be reduced in accordance with the reduction in the axial length, and the risk of the tightening gun head breaking can be reduced. In addition, even if the tightening target torque is increased, the tightening gun head of the utility model is not easy to break, and the service life of the tightening gun head and the tightening gun handle can be prolonged.

Further, in the tightening gun handle according to the present invention, even when it is necessary to use a tightening gun head as a non-standard member having a specific length dimension in accordance with actual requirements at a work site, the required specific length dimension can be secured by setting the dimension of the extension link, and therefore, a standard tightening gun head having a standard dimension can be used in the tightening gun handle, whereby even when the tightening gun head needs to be replaced due to damage or the like, the tightening gun head as a standard member can be replaced and used, and there is no need to customize the tightening gun head as a non-standard member having a specific length dimension as in the past, and maintenance costs can be further reduced.

Further, for example, the fastening end portion of the tightening bit head is inserted into the port groove of the extension link and fastened, thereby integrally connecting the tightening bit head and the extension link, and therefore, the tightening bit head can be easily attached to and detached from the extension link, the replacement work can be simplified, and the number of man-hours can be reduced accordingly. Thus, the tightening gun handle can be provided with a prolonged service life and a reduced maintenance cost.

Drawings

Fig. 1 is a schematic sectional view showing a conventional tightening gun handle.

Fig. 2A is a front view schematically showing a tightening gun handle of the present invention, and fig. 2B is a schematic sectional view showing a line a-a in fig. 2A.

Fig. 3A is a front view schematically showing a guide sleeve in the tightening gun handle of the present invention, and fig. 3B is a schematic sectional view showing a line B-B in fig. 3A.

Fig. 4A is a front view schematically showing an elongated link in the tightening gun handle of the present invention, and fig. 4B is a cross-sectional view showing a line C-C in fig. 4A.

Fig. 5 is a front view schematically showing a tightening gun head in the tightening gun handle of the present invention.

Detailed Description

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. However, the following embodiments are merely exemplary of preferred configurations of the present invention, and the scope of the present invention is not limited to these configurations. The dimensions, materials, shapes, relative arrangements, and the like of the components described in the embodiments are not intended to limit the scope of the present invention to these unless otherwise specifically stated.

In addition, like reference numerals refer to like elements throughout the drawings. In the drawings, the size of some of the features may be varied for clarity. Also, all terms (including technical and scientific terms) used in the specification have the meaning commonly understood by those skilled in the art, unless otherwise defined. Well-known functions or constructions may not be described in detail for brevity and/or clarity.

In addition, as used in this specification, the singular forms "a", "an", and "the" include plural referents unless the content clearly dictates otherwise. The terms "comprising," "including," and "containing" when used in this specification specify the presence of stated features, but do not preclude the presence or addition of one or more other features. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

For convenience of understanding, one end, one side or the other side close to the bolt to be tightened is referred to as a front end, a front side or a front side, and the other end, the other side or the other side far from the bolt is referred to as a rear end, a rear side or a rear side.

Fig. 1 is a schematic sectional view showing a conventional tightening gun handle 200. As shown in fig. 1, the conventional tightening gun handle 200 includes a guide sleeve X1, a tightening gun head X2, and a spring X3. Since the tightening gun head X2 has a long dimension in the axial direction as shown in fig. 1, when the tightening gun head X2 is offset from the bolt in the axial direction during use, the portion of the tightening gun head X2 remote from the tightening end is liable to cause a shaft breakage, and particularly, as the tightening target torque increases, the risk of the shaft breakage of the tightening gun head X2 further increases. Further, in the case of using the screw-down tip head X2 as a non-standard member having a specific length dimension according to the needs of a work site, the screw-down tip head X2 needs to be customized as needed, and the manufacturing process is complicated and the procurement period is long.

Next, the tightening gun handle 100 according to an embodiment of the present invention will be described in detail with reference to fig. 2A to 5.

As shown in fig. 2A and 2B, a tightening gun handle 100 according to an embodiment of the present invention includes a guide sleeve 1, an extension link 2, a tightening gun head 3, and a spring 4.

Fig. 3A and 3B show an example of a specific structure of the guide sleeve 1 for tightening the grip 100. As shown in fig. 3A and 3B, the guide sleeve 1 has a first portion 1a and a second portion 1B. The first portion 1a is located on the front side in the axial direction X of the guide sleeve 1, and has a first passage 1a formed by a first hollow portion 1a1 and a second hollow portion 1a2 communicating with each other therein, and the second portion 1b is located on the rear side, and has a second passage 1b1 therein.

In the guide sleeve 1, the first hollow portion 1a1 in the first portion 1a has a diameter smaller than that of the second hollow portion 1a2, and the second hollow portion 1a2 communicates with the second passage 1b1 and has a diameter smaller than that of the second passage 1b 1. In the first portion 1a of the guide sleeve 1, a boss 5 (first receiving portion) for abutting against one end of the spring 4 is formed at a boundary portion between the first hollow portion 1a1 and the second hollow portion 1a 2. A through hole 1t (hereinafter, also referred to as a "third through hole 1 t") having a substantially circular cross section is opened in a rear side peripheral surface of the second portion 1b of the guide sleeve 1. Further, the front end surface 1r located at the front end of the first portion 1a of the guide bush 1 has a shape that can be aligned with the outer periphery of the bolt to be tightened so as to cap the bolt to be tightened when in use.

Fig. 4A and 4B show an example of a specific structure of the extension link 2 for tightening the grip 100. As shown in fig. 4A and 4B, the extension link 2 has a front portion 2a and a rear portion 2B. A port groove 2k is opened in the front portion 2a of the extension link 2, and the port groove 2k is recessed from the front end surface 2m of the front portion 2a toward the rear portion 2b by a predetermined distance, and a fastening end portion 3b of the fastening tip 3, which will be described later, is inserted. Further, a first through hole 2t1 having a substantially circular cross section is opened in the peripheral surface of the front portion 2a of the extension link 2, and the first through hole 2t1 overlaps the port groove 2k when viewed in the direction perpendicular to the axial direction X. The distal end surface 2m of the distal portion 2a of the extension link 2 is an end surface (second receiving portion) for abutting against the other end of the spring 4. Further, a second through hole 2t2 having a substantially racetrack-shaped cross section is opened in the rear portion 2b of the extension link 2, and the dimension of the second through hole 2t2 in the axial direction X is larger than the dimension of the third through hole 1t opened in the circumferential surface of the second portion 1b of the guide sleeve 1 in the axial direction X.

The extension link 2 further includes a tightening gun connection portion 2n (a portion surrounded by a broken line) at a position rearward of the rear portion 2b, the tightening gun connection portion 2n being used for fastening and connecting to a gun shaft of a tightening gun (not shown) so that the extension link 2 and the tightening gun head 3 in the tightening gun handle 100 are rotated by the gun shaft of the tightening gun to tighten the bolt.

Next, a structure of screwing the lance tip 3 will be described. The length of the screw-down lance tip 3 in the axial direction X is in the range of 20mm to 70mm, and is a standard lance tip which does not need to be specially customized. Fig. 5 shows an example of a structure of the screw tip 3 for screwing the grip 100.

As shown in fig. 5, the tightening gun head 3 has a tightening end portion 3a on the front side and a tightening end portion 3b on the rear side, the tightening end portion 3a being an end portion for tightening a bolt, and the tightening end portion 3a has a tightening head 3a1 at the front end for fitting with a groove portion of the bolt to be tightened. The fastening end portion 3b has substantially the same sectional shape as the port groove 2k of the extension link 2, and can be inserted into the port groove 2 k. Here, the cross-sectional shapes of the fastening end 3b and the port groove 2k are polygonal shapes, but may be other shapes such as circular shapes. Further, a recessed groove 3c is formed in the circumferential surface of the fastening end portion 3b of the screw tip 3, and the positioning pin passes through the first through hole 2t and abuts against the recessed groove 3c in a state where the fastening end portion 3b of the screw tip 3 is inserted into the port groove 2k of the extension link 2.

Next, a procedure of attaching the grip 100 to the screw according to an embodiment of the present invention will be described.

Step 1: first, the fastening end portion 3b of the screw tip 3 is inserted into the port groove 2k of the front portion 2a of the extension link 2, and a positioning pin (not shown) is inserted through the first through hole 2t provided in the front portion 2a of the extension link 2 and brought into contact with the recessed groove 3c provided in the fastening end portion 3b, whereby the fastening end portion 3b of the screw tip 3 and the front portion 2a of the extension link 2 are fastened together by the positioning pin so as not to be movable relative to each other in the axial direction X, and the screw tip 3 and the extension link 2 are integrated.

Step 2: next, the spring 4 is put into the guide sleeve 1 from the second portion 1b side of the guide sleeve 1, and one end of the spring 4 is brought into contact with the boss 5 in the guide sleeve 1.

And step 3: then, the screw tip 3 and the extension link 2, which are integrated, are inserted into the guide sleeve 1 from the second portion 1b side of the guide sleeve 1, and the distal end surface 2m of the extension link 2 is brought into contact with the other end of the spring 4, and at this time, the screw tip 3 is inserted through the spring 4.

And 4, step 4: finally, the extension link 2 is pressed forward against the elastic force of the spring 4, the third through hole 1t opened in the rear circumferential surface of the second portion 1b of the guide sleeve 1 is aligned with the second through hole 2t2 opened in the rear portion 2b of the extension link 2, and the positioning pin (not shown) is inserted through the third through hole 1t and the second through hole 2t 2.

By performing the above-described mounting steps, the mounting of the tightening gun handle 100 of the present embodiment is completed. Preferably, the tightening tip 3 is coaxial with the extension link 2 in a state where the tightening end portion 3b of the tightening tip 3 is inserted into the port groove 2k, and more preferably, the axial centers of the tightening tip 3 and the extension link 2 overlap with the axial center of the guide sleeve 1.

Further, since the dimension in the axial direction X of the second through hole 2t2 is larger than the dimension in the axial direction X of the third through hole 1t, the rear portion 2b of the extension link 2 and the second portion 1b of the guide sleeve 1 are connected so as to be movable relative to each other in the axial direction in a state where the positioning pin is inserted, that is, the screw-up gun head 3 and the extension link 2 which are integrated with each other are movable relative to the guide sleeve 1 in the axial direction.

The maximum stroke amount of the screw tip 3 and the extension link 2 moving in the axial direction X with respect to the guide sleeve 1 may be determined as appropriate depending on at least one of the elastic coefficient of the spring 4, the length of the spring 4, the difference in the axial dimensions of the second through hole 2t2 and the third through hole 1t, and the like.

Further, the tightening gun connection portion 2n of the extension link 2 located outside the rear portion of the guide sleeve 1 is fastened to the gun shaft of the tightening gun (not shown), so that the entire tightening gun handle 100 is connected to the tightening gun, whereby the extension link 2 and the tightening gun head 3 in the tightening gun handle 100 can be rotated by the gun shaft of the tightening gun to tighten the bolt to be tightened.

Next, a use state of the tightening gun handle 100 according to an embodiment of the present invention will be described.

The tightening gun handle 100 of the present embodiment has a non-operating state and an operating state.

The non-working state refers to the state that: the spring 4 presses the front end surface 2m of the front portion 2a of the extension link 2 toward the rear side, and the positioning pin inserted through the third through hole 1t of the guide sleeve 1 abuts against the front end wall portion of the second through hole 2t2 of the rear portion 2b of the extension link 2 by the spring 4. In the inoperative state, the end face of the tightening end 3a of the tightening tip 3 is recessed inwardly with respect to the end face of the first portion 1a of the guide sleeve 1. Thereby, the tightening end portion 3a of the tightening gun head 3 can be protected from damage from the outside.

In addition, the operating state refers to a state in which: the extension link 2 is pressed forward against the elastic force of the spring 4, and the entire extension link 2 and the tightening tip 3 are moved forward relative to the guide sleeve 1, whereby the tightening head 3a1 of the tightening tip 3 (i.e., the end surface of the tightening end 3 a) protrudes outward relative to the end surface of the first portion 1a of the guide sleeve 1 and engages with the groove portion of the bolt to be tightened, and the tightening end 3a of the tightening tip 3 is rotated and the bolt to be tightened, for example, by the driving of a tightening gun fastened to the tightening grip 100. Fig. 2A and 2B schematically show the operation of tightening the pistol grip 100.

In the state in which the entire extension link 2 and the screw tip 3 are at the maximum stroke amount with respect to the guide sleeve 1, the positioning pin inserted through the third through hole 1t of the guide sleeve 1 may abut against the rear end wall portion of the second through hole 2t2 of the rear side portion 2b of the extension link 2, but the spring 4 may not yet reach the maximum compression state, the positioning pin inserted through the third through hole 1t may not yet abut against the rear end wall portion of the second through hole 2t2 as the spring 4 may reach the maximum compression state, or the positioning pin inserted through the third through hole 1t may abut against the rear end wall portion of the second through hole 2t2 and the spring 4 may reach the maximum compression state. In the state of the maximum stroke amount, the distal end surface 2m of the extension link 2 may or may not abut against the boundary surface between the first portion 1a and the second portion 1b of the guide bush 1.

According to the tightening gun handle 100, since the tightening gun tip 3 in the tightening gun handle 100 is detachably connected to the guide sleeve 1 via the extension link 2, for example, the length of the tightening gun tip 3 in the axial direction X can be set to a range of 20mm to 70mm, and the length of the tightening gun tip 3 in the axial direction X can be significantly reduced as compared with a conventional tightening gun tip as shown in fig. 1, whereby when the tightening gun tip 3 is displaced in the axial direction X by a fastener such as a bolt during use, the moment applied to a portion of the tightening gun tip 3 away from the tightening end portion 3a can be reduced in accordance with the reduction in the axial length, and the risk of the tightening gun tip 3 breaking can be reduced. In addition, even if the tightening target torque is increased during use, the tightening gun head 3 is not easily broken, and the service lives of the tightening gun head 3 and the tightening gun handle 100 can be prolonged.

Further, in the above-described tightening gun handle 100, even when it is necessary to use a tightening gun head as a non-standard member having a specific length dimension in accordance with actual requirements at a work site, since the required specific length dimension can be secured by setting the dimension of the extension link 2, the tightening gun head 3 having the standard dimension can be used in the tightening gun handle 100, whereby even when the tightening gun head 3 needs to be replaced due to damage or the like, the tightening gun head 3 as the standard member can be replaced and used, and there is no need to customize the tightening gun head as the non-standard member having the specific length dimension as in the related art, and maintenance cost can be further reduced.

Further, for example, the fastening end portion 3b of the screw tip 3 is inserted into the port groove 2k of the extension link 2 and fastened by a positioning pin or the like, thereby integrally connecting the screw tip 3 and the extension link 2, so that the screw tip 3 can be easily attached to and detached from the extension link 2, the replacement work can be simplified, and the number of steps can be reduced accordingly. This makes it possible to provide a tightening gun handle 100 that can be used for a long time and can be maintained at a low cost.

The tightening gun handle 100 according to the embodiment of the present invention has been described above in detail, but the present invention is not limited to this, and the tightening gun handle of the present invention may be modified as follows, for example.

In the above embodiment, the case where the screw-up gun head 3 and the extension link 2 are fastened so as not to be relatively movable in the axial direction by causing the positioning pin to pass through the first through hole 2t and to abut against the recessed groove 3c is shown. In addition, a fastening ring can be additionally sleeved at the outer side end of the positioning pin. This prevents the positioning pin from loosening and coming out of the first through hole 2t during use. In addition, instead of the structure in which the screw tip 3 and the extension link 2 are fastened and connected by the positioning pin, or in addition to this structure, the female screw may be provided in the port groove 2k of the extension link 2, the male screw may be provided in the fastening end portion 3b of the screw tip 3, and the front portion 2a of the extension link 2 and the fastening end portion 3b of the screw tip 3 may be fastened and connected by the screw. Further, a port groove may be opened in the fastening end portion 3a of the fastening tip 3, and the front portion 2a of the extension link 2 may be inserted into and fastened to the port groove of the fastening tip 3. In the tightening gun handle of the present invention, the fastening end portion 3b of the tightening gun head 3 and the front portion 2a of the extension link 2 may be integrally fastened and connected, and the fastening end portion 3b of the tightening gun head 3 and the front portion 2a of the extension link 2 may be connected by another method such as a magnetic attraction method, for example.

In the above embodiment, the case where the screw-down gun head 3 and the extension link 2 are connected to the guide sleeve 1 so as to be relatively movable in the axial direction by passing the dowel pin shaft through the third through hole 1t and the second through hole 2t2 is shown. On the basis, a fastening ring can be additionally sleeved at the outer side end of the positioning pin shaft. This prevents the positioning pin from loosening and coming off the third through hole 1t during use. In addition, although the case where the cross section of the third through hole 1t is substantially circular and the cross section of the second through hole 2t2 is substantially racetrack-shaped has been described above, the present invention is not limited thereto, and the cross sections of the third through hole 1t and the second through hole 2t2 may be other shapes such as a polygon. In the tightening gun handle according to the present invention, the dimension of the second through hole 2t2 in the axial direction X may be smaller than the dimension of the third through hole 1t in the axial direction X, as long as the tightening gun head 3 and the extension link 2 are connected to the guide sleeve 1 so as to be able to move relatively in the axial direction.

In the above embodiment, the case where the first receiving portion that abuts against one end of the spring 4 is the boss 5 of the guide sleeve 1 and the second receiving portion that abuts against the other end of the spring 4 is the distal end surface 2m of the extension link 2 has been described, but the present invention is not limited to this, and the spring 4 may be provided in other portions of the guide sleeve 1 and the extension link 2 as long as it abuts between the guide sleeve 1 and the extension link 2 so that the screw tip 3 and the extension link 2 are connected to the guide sleeve 1 so as to be relatively movable in the axial direction.

In the above embodiment, the spring 4 may be omitted, and the screw tip 3 and the extension link 2 may be fixed to the guide sleeve 1 by matching the dimensions of the second through hole 2t2 and the third through hole 1t in the axial direction X. In the case where the spring 4 is omitted, the rear portion 2b of the extension link 2 may be connected to the guide sleeve 1 by means of a screw, magnetic attraction, or the like.

Further, while exemplary embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications can be made to the exemplary embodiments of the present invention without substantially departing from the spirit and scope of the present invention. Accordingly, all such changes and modifications are intended to be included within the scope of the present invention as defined in the appended claims. The utility model is defined by the following claims, with equivalents of the claims to be included therein.

Claims (9)

1. A tightening gun handle is characterized by comprising:

a guide sleeve;

a tightening gun head having a tightening end portion on a front side for tightening a bolt and a tightening end portion on a rear side;

an extension link having a front portion detachably fastened to and integrated with the fastening end portion of the screw gun head, and a rear portion connected to the guide sleeve; and

a spring abutting between the guide sleeve and the extension link.

2. The tightening gun handle according to claim 1,

and the front side part is provided with an end opening groove, and the end opening groove is used for inserting and fastening the fastening end part of the screwing gun head.

3. The tightening gun handle according to claim 2,

the circumferential surface of the front part of the lengthened connecting rod is provided with a first through hole, the circumferential surface of the fastening end part of the tightening gun head is provided with a groove,

and under the condition that the fastening end part of the tightening gun head is inserted into the port groove, the positioning pin penetrates through the first through hole and is abutted against the groove.

4. The tightening gun handle according to claim 2 or 3,

the port groove of the lengthened connecting rod is provided with internal threads, the fastening end part of the tightening gun head is provided with external threads, and the front side part of the lengthened connecting rod is in threaded connection with the fastening end part of the tightening gun head.

5. The tightening gun handle according to claim 2 or 3,

and under the condition that the fastening end part of the tightening gun head is inserted into the port groove, the tightening gun head and the lengthening connecting rod have the same axle center.

6. The tightening gun handle according to claim 1 or 2,

the screw-up gun head is a standard piece.

7. The tightening gun handle according to claim 1 or 2,

the length of the tightening gun head in the axial direction is in the range of 20 mm-70 mm.

8. The tightening gun handle according to claim 1 or 2,

a second through hole is arranged on the circumferential surface of the rear side part of the lengthened connecting rod, a third through hole is correspondingly arranged on the circumferential surface of the guide sleeve,

and the positioning pin shaft penetrates through the second through hole and the third through hole.

9. The tightening gun handle according to claim 8,

the second through hole and the third through hole are different in size in the axial direction of the guide sleeve.

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