CN216180101U

CN216180101U - Sheath device, rifle head subassembly and electrodynamic type bolt tight rifle

Info

Publication number: CN216180101U
Application number: CN202122495321.1U
Authority: CN
Inventors: 王佳凤; 刘野; 李英; 胡晓峰; 梁闯
Original assignee: BMW Brilliance Automotive Ltd
Current assignee: BMW Brilliance Automotive Ltd
Priority date: 2021-10-15
Filing date: 2021-10-15
Publication date: 2022-04-05
Anticipated expiration: 2031-10-15

Abstract

The utility model relates to a sheath device, a gun head assembly (1) and an electric bolt tightening gun. The sheath device includes an inner sheath member (30), a movable sheath member (10), a spring member (20), and a stopper sleeve member (40). The movable sleeve part (10) can move telescopically in a certain range along the longitudinal axis of the gun head relative to the limiting sleeve part (40). After the sheath device is installed, when the electric bolt tightening gun is not operated, the spring part keeps an extension state, so that the movable sleeve part (10) extends to cover the working part (34) of the gun head; when the electric bolt tightening gun is operated, the movable sleeve member (10) is pushed backward to retract a distance against the elastic force of the spring member (20), thereby exposing the working portion of the gun head for tightening operation. The sheath means is arranged to cover the working portion of the lance tip to avoid inadvertent scratching of the surface of the associated component.

Description

Sheath device, rifle head subassembly and electrodynamic type bolt tight rifle

Technical Field

The present invention relates to a sheathing device for protecting a gun head of an electric bolt tightening gun, to a gun head assembly provided with the sheathing device, and to an electric bolt tightening gun equipped with the gun head assembly.

Background

In the automotive industry, it is often necessary to use electrically powered bolt tightening guns to tighten a threaded member (such as a torque tool bolt) to connect the associated components. Before and after the tip of the electric bolt tightening gun is moved into and out of a working point where tightening is performed, since the exposed tip (particularly, a working portion at the front end of the tip) is hard, the surface of a vehicle body or the surface of a related component may be inadvertently scratched, and the scratched portion has to be repaired by a post-process such as painting, thereby unnecessarily increasing the labor intensity of a worker and the production cost.

One conceivable solution is to fixedly mount a protective sleeve made of a flexible material on the front end of the lance tip to surround the working portion of the lance tip to provide protection. Such a protective sleeve has a certain effect on the cylindrical working portion, since the lance tip performs a certain amount of axial movement during operation, but for sharp and/or profiled working portions it is extremely vulnerable and does not ensure that the working portion is exposed during operation for the tightening operation.

Accordingly, it is desirable to provide a sheath device for exposing a working portion of a gun head for a tightening operation when an electric bolt tightening gun is operated, and covering the working portion of the gun head when not operated, thereby preventing the working portion from unintentionally scratching a surface of a vehicle body or a related component.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problems, the present invention provides the following concepts: the protective sleeve device is sleeved on the gun head of the electric bolt tightening gun, and can always cover the working part of the gun head when the electric bolt tightening gun is not operated, so that the working part of the gun head is prevented from accidentally scratching the surface of a vehicle body or the surface of a related part. When the electric bolt tightens the gun, the sheath device can retract a certain distance to expose the working part of the gun head for tightening operation. After the tightening operation is finished, the sheath device can be automatically reset to cover the working part of the gun head again. Therefore, the protection is provided for the working part of the gun head in a simple and low-cost mode, the related parts are prevented from being damaged, and the subsequent labor cost and treatment cost are saved.

Therefore, the utility model provides a sheath device which is constructed to be sleeved on a gun head of an electric bolt tightening gun so as to protect a working part at the front end of the gun head. The sheath device includes: the inner sleeve component is used for being sleeved on the batch rod part of the gun head; a movable sleeve member for movable mounting to the batch bar portion; a spring member for being movably fitted to the batch rod portion between the inner sleeve member and the movable sleeve member, a first end of the spring member abutting against a second end surface of the movable sleeve member, a second end of the spring member abutting against the first end surface of the inner sleeve member; a stopper sleeve member configured to be fitted around the inner sleeve member, the spring member, and the movable sleeve member, and fastened to a circumferential surface of the inner sleeve member such that the movable sleeve member is capable of telescopic movement relative to the stopper sleeve member within a range along a longitudinal axis of the torch head; after the sheath device is installed, when the electric bolt tightening gun is not operated, the spring component keeps an extending state, so that the movable sleeve component extends to cover the working part of the gun head; when the electric bolt tightening gun is operated, the movable sleeve member is pushed rearward to retract a distance against the elastic force of the spring member, thereby exposing the working portion of the gun head for a tightening operation.

According to the sheath device provided by the utility model, the normal work of the gun head can be ensured and the protection is provided for the working part of the gun head in a simple and low-cost mode, the working part of the gun head is prevented from accidentally scratching the surface of a vehicle body or the surface of a related part before and after the gun head is moved into and out of a tightening operation working point, and further, the labor intensity and the production cost of personnel caused by the follow-up repairing process such as painting on the damaged surface are avoided.

Preferably, the movable sleeve member includes a first end portion covering the working portion and a second end portion having an increased diameter, the first end portion of the movable sleeve member has a plurality of insertion holes arranged along a circumference, and the sheath device further includes a plurality of magnetic members inserted into the plurality of insertion holes. The magnetic means provide sufficient attraction to the threaded element to be tightened in a simple and effective manner.

Preferably, the first end of said movable sleeve part is provided with a recess for receiving a threaded element to be tightened. The recess is arranged to receive the make-up operating end of the threaded element to be made up, facilitating the operational positioning of the lance tip.

Preferably, the stop sleeve component is provided internally with a stop portion for abutting against a first end surface of the second end of the movable sleeve component to define a maximum extension of the movable sleeve component. The stopper portion of the stopper sleeve member defines the maximum extension range of the movable sleeve member.

Preferably, the stopper sleeve member includes a cylindrical portion provided with a plurality of threaded holes through which fastening screws are crimped onto the circumferential surface of the inner sleeve member. The stop collar component positions the various components of the sheath device into position by this connection.

Preferably, the movable sleeve member covers the working portion of the lance tip by a distance of from 0 to 2 mm. This distance ensures that the movable sleeve member always covers the working portion of the lance tip before use, to provide adequate protection.

Preferably, the movable sleeve member is made of a flexible material. The movable sleeve part of flexible material avoids scratching the surface of the vehicle body or the related parts.

Preferably, the limiting sleeve part is printed with the models of the sheath devices for the gun heads of different models. The arrangement of the models of the sheath devices is convenient for distinguishing the sheath devices used for the gun heads of different models, so that the corresponding sheath devices are easy to find out for replacement after the sheath devices are lost or damaged.

Preferably, the spring member is a coil spring. The coil spring can provide good limiting and resetting effects.

The utility model provides a gun head assembly which comprises a gun head used for an electric bolt tightening gun and a sheath device, wherein the sheath device is sleeved on the gun head. The gun head assembly provided with the sheath device can fully protect the working part of the gun head in a simple and effective mode, and beneficial economic benefits are brought due to the fact that extra cost caused by processes such as scratch repair and the like is avoided.

The utility model provides an electric bolt tightening gun which is provided with the gun head assembly. The electric bolt tightening gun provided with the gun head assembly can be tightened in an economic mode.

Drawings

A more complete appreciation of the utility model and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein:

fig. 1 shows an electric bolt-tightening gun equipped with a gun head assembly provided with a sheathing apparatus according to the present invention;

figures 2a and 2b show enlarged views of the part identified by circle a in figure 1 in a retracted state and an extended state, respectively, of the sheath device of the present invention;

figure 3 shows an exploded view of the sheath device according to the utility model mounted on the lance head; and

figure 4 shows a cross-sectional view of a sheath device according to the utility model mounted on a lance head.

Detailed Description

With reference to fig. 1, there is shown an electric bolt-tightening gun 2 equipped with a gun head assembly 1 provided with a sheathing apparatus according to the present invention. The gun head assembly 1 comprises a gun head 3 used for tightening the gun 2 by an electric bolt and a sheath device sleeved on the gun head 3. The sheath device is provided such that it always remains covering the working portion 34 of the gun head 3 when the electric bolt tightening gun 2 is not operated (see fig. 2 b). When the electric bolt tightening gun 2 is operated, the working portion 34 of the gun head 3 is exposed from the sheath device (see fig. 2a) to perform the tightening operation. After the tightening operation is finished, the sheath device is automatically reset to cover the working portion 34 of the lance tip 3. Due to the shielding effect of the sheathing means, it is avoided that the hard and/or sharp working portion 34 of the lance tip 3 unintentionally scratches the surface of the bodywork or the related components.

Referring to fig. 3, there is shown an exploded view of the sheath apparatus according to the utility model mounted to the lance tip. The sheath device mainly includes an inner sheath member 30, a spring member 20, a movable sheath member 10, and a stopper sheath member 40. The sheath device is detachably mounted on the gun head 3 of the electric bolt tightening gun 2.

The inner sleeve member 30 may be configured to be sleeve-connected to the elongated shank portion 36 of the lance tip 3. Preferably, the inner sleeve member 30 is securely sleeved onto the batch rod portion 36. The inner sheath member 30 is made of a metal material. Preferably, the inner sheath member 30 is made of a stainless steel material. The movable sleeve member 10 comprises a first end 16 for covering the working portion 34 of the lance tip 3 and a second end 12 of increased diameter. The second end surface 19 of the second end portion 12 is adapted to abut a spring member 20. The movable sleeve member 10 is configured to be slidably mounted to the batch rod portion 36. Referring to fig. 3, the spring member 20 is sleeved to the batch rod portion 36 and is located between the inner sleeve member 30 and the movable sleeve member 10. The first end of the spring member 20 abuts against the second end surface 19 of the movable sleeve member 10 and the second end of the spring member 20 abuts against the first end surface 32 of the inner sleeve member 30. Thus, the inner sheath member 30 provides a limit function to the spring member 20. The spring member 20 is preferably a coil spring. The spring member 20 may also be a cylindrical member having a desired elasticity. In the assembled gun head assembly 1 (see fig. 4), the spring member is normally in an extended state, ensuring that the movable sleeve member 10 extends beyond the working portion 34 of the gun head 3 by a distance of 0-2mm, thereby ensuring that the working portion 34 of the gun head 3 is completely covered. When the electric bolt tightening gun 2 equipped with the gun head assembly 1 is operated, the working portion 34 of the gun head 3 is exposed from the sheath device by 3-6mm to perform the tightening operation. The movable sleeve member 10 is made of a flexible material (i.e. a non-rigid material, preferably a POM material) and encases the rigid working portion 34 of the lance tip to avoid scratching the surface of the vehicle body.

Referring to fig. 4, the stop collar component 40 may include a conical portion and a cylindrical portion. The stop sleeve component 40 comprises a stop portion 41, and the stop portion 41 may be disposed within the conical portion. The stop portion 41 is configured to abut against the first end surface 18 of the second end portion 12 of the movable jacket member 10 to define the maximum extension of the movable jacket member 10. The cylindrical portion of the stop collar member 40 may be provided with a plurality of threaded holes 42, preferably three threaded holes evenly spaced circumferentially, or more than three threaded holes. The stop collar member 40 is fixed by screwing a fastening screw through the screw hole 42 to be crimped onto the circumferential surface of the inner collar member 30. Also, the stop collar member 40 positions the various components of the sheath assembly into position through this connection. The stop collar component 40 may be made of a flexible material (i.e., a non-rigid material, preferably a POM material).

When the sheath device and the gun head 3 are assembled to form the gun head assembly 1, the inner sleeve part 30 is firmly sleeved on the batch rod part 36 of the gun head 3; then the spring member 20 and the movable sleeve member 10 are successively sleeved onto the batch rod portion 36 such that the second end portion of the spring member 20 abuts against the first end surface 32 of the inner sleeve member 30 and the first end portion of the spring member 20 abuts against the second end surface 19 of the movable sleeve member 10; then the cylindrical portion of the stop sleeve member 40 is sleeved a distance from the first end 16 of the moveable sleeve member 10 such that the stop portion 41 of the stop sleeve member 40 abuts the first end surface 18 of the second end 12 of the moveable sleeve member 10 and the second end of the spring member 20 in the extended state just abuts the first end surface 32 of the inner sleeve member 30; finally, a plurality of fastening screws are radially crimped onto the circumferential surface of the inner sleeve member 30 through the threaded holes 42 of the stop sleeve member 40, thereby mounting the sheath device on the lance tip 3 to form the lance tip assembly 1 provided with the sheath device. The gun head assembly formed in this way is inserted into the electric bolt tightening gun 2, and tightening operation can be performed. The above arrangement enables the movable sleeve part 10 to perform a telescopic movement within a certain range along the longitudinal axis of the lance tip 3 relative to the stop sleeve part 40 under the action of the spring part 20. When the electric bolt tightening gun is not operated, the spring part 20 keeps an extending state, so that the movable sleeve part 10 extends outwards to cover the working part 34 of the gun head 3; in the operation of the electric bolt tightening gun, the movable sleeve member 10 is pushed rearward to retract a distance against the elastic force of the spring member 20, thereby exposing the working portion 34 of the gun head 3 for a tightening operation of a screw member such as a torque tool bolt. After the tightening operation is finished, the sheath means is automatically restored by the elastic action of the spring means 20 to re-cover the working portion 34 of the lance tip 3.

Since the movable sleeve part 10 can always cover the working part 34 of the lance tip 3 from being exposed when the lance tip assembly 1 is not in use, inadvertent scratching of the bodywork surface during movement of the lance tip 3 into and out of the working point is avoided.

The various components of the sheathing apparatus are of corresponding construction and dimensions to those of the lance tip 3. In order to facilitate the distinction of the sheathing devices for different models of lance tips 3, the model of the sheathing device may also be printed on the stop collar part 40, so that the corresponding sheathing device is easily found for replacement after the sheathing device is lost or damaged.

As shown in fig. 3 and 4, the sheath device further comprises a plurality of magnetic elements 14 inserted in the first end 16 of the mobile sleeve element 10. The plurality of magnetic elements 14 is preferably six. The first end 16 of the movable sleeve part 10 is provided with a plurality of circumferentially arranged insertion holes 17 for inserting a plurality of magnetic parts 14 and a recess 28 for receiving a torque tool bolt to be tightened. The shape of the recess 28 is adapted to the tightening operating end of the torque tool bolt so that at least a portion of the tightening operating end can be received in the recess for facilitating the operational positioning of the lance tip 3.

Magnetic component 14 may be used to provide suction to a threaded member (such as a torque tool bolt) that acts to: 1) for a conventional, non-magnetic, working part 34 of the lance tip 2, the suction effect is additionally provided at low manufacturing costs; 2) for a working part 34 of the lance tip 2 with certain magnetism, a more enhanced suction effect is provided at a lower cost; 3) if the magnetism of the magnetic component is not enough, a new magnetic component with stronger magnetism can be conveniently replaced; and 4) the magnetic part has simple structure, easy installation and manufacture, saves magnetic materials and reduces production cost.

The utility model also provides a gun head assembly which comprises a gun head for an electric bolt tightening gun and the protective sleeve device sleeved on the gun head. The gun head assembly provided with the sheath device can fully protect the working part of the gun head in a simple and effective mode, and beneficial economic benefits are brought due to the fact that extra cost caused by processes such as scratch repair and the like is avoided.

The utility model also provides an electric bolt tightening gun which is provided with the gun head assembly. The electric bolt tightening gun provided with the gun head assembly can be tightened in an economic mode.

As is understood by a person skilled in the art, the foregoing detailed description has been given by way of illustration and example only, and the utility model is not limited to the above-described embodiments, but many variations are possible within the scope of the utility model as defined by the appended claims. Features from one embodiment may be used in combination with features from other embodiments within the scope of the inventive concept.

Claims

1. A sheathing apparatus, characterized in that the sheathing apparatus is configured to be fitted over a gun head (3) of an electric bolt tightening gun (2) to protect a working portion (34) of a front end of the gun head, the sheathing apparatus comprising:

the inner sleeve component (30) is used for being sleeved on the batch rod part (36) of the gun head (3);

a movable sleeve member (10), said movable sleeve member (10) being adapted to be movably mounted to a batch bar portion (36);

a spring member (20) for movable sleeving onto the batch rod portion (36) between the inner sleeve member (30) and the movable sleeve member (10), a first end of the spring member (20) abutting against the second end surface (19) of the movable sleeve member (10) and a second end of the spring member abutting against the first end surface (32) of the inner sleeve member (30);

a stopper sleeve member (40), the stopper sleeve member (40) being configured to be mounted around the inner sleeve member (30), the spring member (20), and the movable sleeve member (10), and being fastened to a circumferential surface of the inner sleeve member (30) such that the movable sleeve member (10) is capable of telescopic movement within a range along a longitudinal axis of the lance tip (3) with respect to the stopper sleeve member (40);

wherein, after the sheath device is installed, when the electric bolt tightening gun is not operated, the spring part keeps an extension state, so that the movable sleeve part (10) extends to cover the working part (34) of the gun head (3); when the electric bolt tightening gun is operated, the movable sleeve member (10) is pushed backward to retract a distance against the elastic force of the spring member (20), thereby exposing the working portion (34) of the gun head (3) for tightening operation.

2. Sheath device according to claim 1, characterized in that the movable sleeve part (10) comprises a first end (16) covering the working portion (34) and a second end (12) of increased diameter, the first end of the movable sleeve part having a plurality of circumferentially arranged receptacles (17), the sheath device further comprising a plurality of magnetic parts (14) which are plugged into the plurality of receptacles.

3. Sheath device according to claim 2, characterized in that the first end (16) of the movable sleeve member (10) is further provided with a recess (28) for receiving a threaded element to be tightened.

4. Sheath device according to claim 1, characterized in that the stop sleeve member (40) is provided internally with a stop portion (41) for abutting against the first end surface (18) of the second end portion (12) of the mobile sleeve member (10) to define the maximum extension of the mobile sleeve member (10).

5. The sheath apparatus according to claim 1, wherein the stop collar member (40) includes a cylindrical portion provided with a plurality of screw holes (42) through which fastening screws are pressed against the circumferential surface of the inner collar member (30).

6. A sheath device according to any one of claims 1-5, characterized in that the movable sleeve member (10) covers the working portion (34) of the lance tip (3) by a distance of 0-2 mm.

7. Sheath device according to any one of claims 1-5, characterized in that the movable sleeve part (10) is made of a flexible material.

8. Sheath device according to any one of claims 1-5, characterized in that the stop collar part (40) is printed with the type of sheath device for different types of lance tips.

9. Sheath device according to any one of claims 1-5, characterized in that the spring member (20) is a coil spring.

10. A lance tip assembly (1) comprising a lance tip (3) for an electrically operated bolt tightening lance (2) and a sheath device according to any one of claims 1 to 9 which is fitted over the lance tip (3).

11. Electric bolt-tightening gun, characterized in that it is equipped with a gun head assembly (1) according to claim 10.