Double-shaft variable-pitch tightening machine

Abstract

The utility model belongs to the technical field of variable-pitch tightening machines, and particularly relates to a double-shaft variable-pitch tightening machine which comprises a variable-pitch tightening machine body, the variable-pitch tightening machine body is in driving connection with a rotating shaft, the rotating shaft is detachably connected with a shaft sleeve, the shaft sleeve is rotationally connected with a tightening head, and a protection mechanism is arranged between the shaft sleeve and the tightening head. According to the double-shaft variable-pitch tightening machine, through the design of the protection mechanism, effective protection on the tightening head and the bolt in the bolt tightening process is achieved, when the bolt reaches the expected tightening state, the outer wall of the tightening head coincides with the outer wall of a workpiece, at the moment, the sliding block moves to the two ends of the groove, and limiting on the rod body is relieved; the second gear sleeve can slide on the sleeve body under the action of the first gear sleeve, so that the shaft sleeve idles, the bolt is prevented from being excessively tightened by the tightening head, abrasion of the tightening head and the bolt caused by excessive tightening is effectively avoided through the mechanism, the service life of a tool is prolonged, and meanwhile the accuracy of tightening operation is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of variable distance tightening machine, concretely to a double-shaft variable distance tightening machine. BACKGROUND

[0002] Variable distance tightening machine is mainly used for tightening and detection of fasteners, has variable distance function, can be suitable for fasteners of different sizes, improves work efficiency and assembly accuracy, transmits torque to fasteners through motor transmission torque, realizes tightening operation, and the principle of variable distance is that the motion of mechanical structure is controlled through the motor, the size of output torque and rotating speed are changed, thereby being suitable for fasteners of different sizes.

[0003] At present, the existing variable distance tightening machine can not automatically prevent over-tightening, which can cause the tightening head to continuously apply tightening force to the bolt during the tightening process, even if the bolt has reached the tightening requirement, the tightening head will still continue to rotate, which can cause over-tightening of the bolt, over-tightening can make the bolt bear torque exceeding its bearing limit, and further can cause damage to the bolt, such as deformation, stretching or even breaking of the bolt thread, which can seriously affect the connection quality of the workpiece and the stability of the overall structure, therefore, we propose a double-shaft variable distance tightening machine. SUMMARY

[0004] The main purpose of the utility model is to provide a double-shaft variable distance tightening machine, which can solve the problems raised in the background art.

[0005] To achieve the above purpose, the utility model provides a double-shaft variable distance tightening machine, which comprises a variable distance tightening machine body, the variable distance tightening machine body is drivenly connected with a rotating shaft, the rotating shaft is detachably connected with a shaft sleeve, the shaft sleeve is rotatably connected with a tightening head, a protection mechanism is arranged between the shaft sleeve and the tightening head, and the protection mechanism comprises:

[0006] A tooth sleeve one is fixedly connected with the outer wall of the shaft sleeve;

[0007] A sleeve body is fixedly connected with the outer wall of the tightening head;

[0008] A tooth sleeve two is fixedly connected with a rod body on the outer wall, and the rod body penetrates the sleeve body and is slidably connected with the sleeve body.

[0009] Preferably, a spring one is fixedly connected with the outer wall of the tooth sleeve two, and the end of the spring one away from the tooth sleeve two is fixedly connected with the outer wall of the sleeve body.

[0010] Preferably, the sleeve body is provided with a groove, and a guide rod is fixedly connected with the inner wall of the groove.

[0011] Preferably, the guide rod penetrates the sliding block and is in sliding connection with the sliding block, the outer wall of the sliding block is hinged with a hinge rod, and the end of the hinge rod away from the sliding block is hinged with a sliding rod.

[0012] Preferably, the sliding rod penetrates the sleeve and is in sliding connection with the sleeve, the top of the sliding rod is designed as a ball, the outer wall of the sliding rod is covered with rubber, the friction between the sliding rod and the outer wall of the workpiece is reduced, the outer wall of the workpiece is protected, and scratches are prevented, one end of a second spring is fixedly connected with the outer wall of the sleeve, and the other end of the second spring is fixedly connected with the outer wall of the sleeve.

[0013] Preferably, the rod body is provided with four groups, and each group of rod bodies corresponds to two groups of sliding blocks.

[0014] The utility model provides a double axle variable pitch tightening machine.

[0015] (1), this double axle variable pitch tightening machine, through the design of protection mechanism, realized the effective protection to the tightening head and bolt in the bolt tightening process, when the bolt reaches the expected tightening state, the outer wall of the tightening head coincides with the outer wall of the workpiece, at this time, the sliding block moves to the both ends of the groove and releases the limiting of the rod body, so that the second gear sleeve can slide on the sleeve under the action of the first gear sleeve, causing the shaft sleeve to idle, thereby preventing the tightening head from over-tightening the bolt, which effectively avoids the wear of the tightening head and the bolt caused by over-tightening, prolongs the service life of the tool, and ensures the accuracy and safety of the tightening operation.

[0016] (2), the double axle variable pitch tightening machine, the protection mechanism also has an automatic reset function, when the tightening operation is completed, the tightening head is separated from the outer wall of the workpiece, at this time, the sliding rod is automatically reset under the action of the second spring, the hinge rod drives the sliding block to return to the original position, and the rod body is re-limited, the automatic reset design makes the protection mechanism quickly return to the initial state, and prepares for the next tightening operation, which not only improves the work efficiency, but also ensures the stability and reliability of the protection mechanism in continuous operation, and enhances the practicability and durability of the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can obtain other drawings from the structures shown in the drawings without creating creative labor.

[0018] Figure 1 It is a whole three-dimensional structure schematic diagram of the utility model;

[0019] Figure 2 This is a partial three-dimensional structural diagram of the present utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the bushing and tightening head of this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the bushing and gear sleeve of this utility model;

[0022] Figure 5 This is a schematic diagram of a three-dimensional cross-sectional structure of the protective mechanism of this utility model;

[0023] Figure 6 This utility model Figure 5 Schematic diagram of structure A in the middle.

[0024] Explanation of icon numbers:

[0025] 1. Variable pitch tightening machine body; 2. Rotary shaft; 3. Bushing; 4. Tightening head; 5. Protection mechanism; 51. Gear sleeve one; 52. Sleeve body; 521. Groove; 522. Guide rod; 523. Sliding block; 524. Hinge rod; 53. Gear sleeve two; 54. Rod body; 55. Spring one; 56. Sliding rod; 57. Spring two.

[0026] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1-6 This utility model proposes a dual-axis variable pitch tightening machine, including a variable pitch tightening machine body 1, a rotating shaft 2 drivenly connected to the variable pitch tightening machine body 1, a bushing 3 detachably connected to the rotating shaft 2, a tightening head 4 rotatably connected to the bushing 3, and a protective mechanism 5 provided between the bushing 3 and the tightening head 4.

[0029] In the embodiment of the utility model, in order to be able to tighten head 4 and bolt protection, specific, protection mechanism 5 includes tooth cover one 51, tooth cover one 51 and axle sleeve 3 outer wall fixed connection, the recess 521 of sleeve body 52 is set up, the inner wall fixed connection of recess 521 has guide rod 522, guide rod 522 passes through sliding block 523 and with sliding block 523 sliding connection, the outer wall of sliding block 523 articulates articulated rod 524, articulated rod 524 away from the one end of sliding block 523 articulates sliding rod 56, sliding rod 56 passes through sleeve body 52 and with sleeve body 52 sliding connection, the outer wall of sliding rod 56 fixed connection has the one end of spring no. 2 57, the other end of spring no. 2 57 and sleeve body 52 outer wall fixed connection, sleeve body 52 and the outer wall of tightening head 4 fixed connection, the outer wall fixed connection of tooth cover no. 2 53 has spring no. 1 55, the one end of spring no. 1 55 away from tooth cover no. 2 53 and sleeve body 52 outer wall fixed connection, tooth cover no. 2 53 outer wall fixed connection has the rod body 54, the rod body 54 passes through sleeve body 52 and with sleeve body 52 sliding connection, and the rod body 54 is equipped with four groups, and each group rod body 54 corresponds two groups sliding block 523, and two groups sliding block 523 symmetrical distribution is in the two sides of rod body 54;

[0030] In the utility model, when using, the staff holds the variable distance tightening machine body 1 by handle and inserts the tightening head 4 and the bolt on the workpiece, then starts the variable distance tightening machine body 1, like Figure 5 and Figure 6As shown, the sliding block 523 is at the end of the rod body 54, thereby limiting the rod body 54, when the variable distance tightening machine body 1 rotates, the inclined tooth surface of the tooth sleeve one 51 fixedly connected with the shaft sleeve 3 will exert force on the inclined tooth surface of the tooth sleeve two 53, since the rod body 54 is limited, the tooth sleeve two 53 will drive the tightening head 4 to rotate synchronously with the shaft sleeve 3, thereby achieving the purpose of tightening the bolt, in the process of tightening the bolt, the tightening head 4 will gradually approach the outer wall of the workpiece, in this process, the outer wall of the workpiece will contact the top of the sliding rod 56, and at the same time, the sliding rod 56 is exerted with force, so that the sliding rod 56 slides into the inside of the sleeve body 52, when the sliding rod 56 moves, the articulated rod 524 will exert force on the sliding block 523, so that the sliding block 523 slides in the groove 521, when the bolt is tightened, the outer wall of the tightening head 4 will coincide with the outer wall of the workpiece, the sliding rod 56 completely enters the inside of the sleeve body 52, at this time, the sliding block 523 moves to the two ends of the groove 521, when the sliding block 523 moves to the two ends of the groove 521, the sliding block 523 is separated from the bottom of the rod body 54, so that the limitation of the rod body 54 is released, therefore, when the inclined tooth surface of the tooth sleeve one 51 exerts force on the inclined tooth surface of the tooth sleeve two 53, the tooth sleeve two 53 will slide on the outer wall of the sleeve body 52 under the action of the tooth sleeve two 53, through the design of the mechanism, when the bolt is tightened, the shaft sleeve 3 can be idled, thereby preventing the tightening head 4 from over-tightening the bolt, thereby protecting the tightening head 4 and the bolt, preventing the tightening head 4 and the bolt from being worn, it should be noted that when the tooth sleeve two 53 slides under the action of the tooth sleeve one 51, the spring one 55 is in an elastic deformation state, when the tooth sleeve one 51 is separated from the tooth sleeve two 53, the tooth sleeve two 53 will be engaged with the tooth sleeve one 51 again under the action of the elastic force of the spring one 55, when the tightening head 4 is separated from the outer wall of the workpiece, the sliding rod 56 will be reset under the action of the elastic force of the spring two 57, in this process, the articulated rod 524 will exert force on the sliding block 523, so that the sliding block 523 coincides with the original position, thereby limiting the rod body 54 again, so as to facilitate the next tightening operation of the variable distance tightening machine body 1.

[0031] The above only describes the preferred embodiments of the present application, and does not limit the patent range of the present application, any equivalent structural transformation made according to the inventive concept of the present application, or direct / indirect application in other related technical fields is included in the patent protection range of the present application.

Claims

1. A dual spindle variable distance spanner tightening machine comprising a variable distance spanner tightening machine body (1), characterized in that: The variable pitch tightening machine body (1) is drivenly connected with a rotating shaft (2), the rotating shaft (2) is detachably connected with a shaft sleeve (3), the shaft sleeve (3) is rotatably connected with a tightening head (4), a protection mechanism (5) is arranged between the shaft sleeve (3) and the tightening head (4), the protection mechanism (5) comprises: A first tooth sleeve (51) is fixedly connected with the outer wall of the shaft sleeve (3); A sleeve body (52) is fixedly connected with the outer wall of the tightening head (4); A second tooth sleeve (53) is fixedly connected with a rod body (54) on the outer wall, the rod body (54) penetrates through the sleeve body (52) and is slidably connected with the sleeve body (52).

2. A dual spindle variable reach power nutrunner as in claim 1, wherein: The second tooth sleeve (53) is fixedly connected with a first spring (55) on the outer wall, one end of the first spring (55) away from the second tooth sleeve (53) is fixedly connected with the outer wall of the sleeve body (52).

3. A dual spindle variable distance spanner wrench as defined in claim 1 wherein: The sleeve body (52) is provided with a groove (521) in the inner wall, and a guide rod (522) is fixedly connected with the inner wall of the groove (521).

4. A dual spindle variable distance spanner wrench as defined in claim 3 wherein: The guide rod (522) penetrates through a sliding block (523) and is slidably connected with the sliding block (523), a hinged rod (524) is hingedly connected with the outer wall of the sliding block (523), and one end of the hinged rod (524) away from the sliding block (523) is hingedly connected with a sliding rod (56).

5. A dual spindle variable distance spanner wrench as defined in claim 4 wherein: The sliding rod (56) penetrates through the sleeve body (52) and is slidably connected with the sleeve body (52), one end of the sliding rod (56) is fixedly connected with a second spring (57) on the outer wall, and the other end of the second spring (57) is fixedly connected with the outer wall of the sleeve body (52).

6. A dual spindle variable distance spanner wrench as defined in claim 4 wherein: The rod body (54) is provided with four groups, each group of rod body (54) corresponds to two groups of sliding blocks (523), and two groups of sliding blocks (523) are symmetrically distributed on both sides of the rod body (54).

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