CN209953733U - Hand riveter - Google Patents

Abstract

The utility model discloses a hand riveter, which relates to the field of hand tools and comprises a first handle, a second handle and a clamping and pulling mechanism, wherein the second handle can rotate around a pivot shaft relative to the first handle; the second handle is divided into a force application end and a lifting end by the pivot shaft, and the lifting end is connected with the clamping and pulling mechanism through a connecting shaft; when the force application end of the second handle rotates and opens relative to the first handle, the raising end of the second handle drives the clamping and pulling mechanism to move towards the riveting direction; when the force application end of the second handle rotates and closes relative to the first handle, the raising end of the second handle drives the clamping and pulling mechanism to move towards the rivet pulling direction. The utility model discloses a reasonable setting makes the hand riveter laborsaving when riveting, grips comfortablely.

Description

Hand riveter

Technical Field

The utility model relates to a hand tool field especially relates to a hand riveter.

Background

The traditional hand riveter comprises a handle and a clamping and pulling mechanism, wherein the handle is folded to pull up the clamping and pulling mechanism during use, and the clamping and pulling mechanism clamps and breaks rivets. The rivet gun is mostly a device using a lever as a principle, and in order to realize larger lever ratio and achieve the aim of labor saving, the raising end is closer to the supporting axis, namely, the closer the hole distance is, the more labor is saved, but the times of pulling for shortening the rivet stroke are increased, the rivet gun loses the normal rivet function when the stroke is short to a certain distance, and the handle is uncomfortable to clamp when the opening is too large.

Therefore, those skilled in the art have endeavored to develop a riveter which is more labor-saving and more comfortable to operate; meanwhile, one specification head has multiple purposes through the design of the specification head.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects in the prior art, the technical problem to be solved in the utility model is to provide a rivet gun that is more laborsaving during rivet pulling to and exempt from to trade the specification head.

In order to achieve the aim, the utility model provides a hand riveter, which comprises a first handle, a second handle and a clamping and pulling mechanism,

the second handle is rotatable about a pivot axis relative to the first handle;

the second handle is divided into a force application end and a lifting end by the pivot shaft, and the lifting end is connected with the clamping and pulling mechanism through a connecting shaft; when the force application end of the second handle rotates and opens relative to the first handle, the raising end of the second handle drives the clamping and pulling mechanism to move towards the riveting direction; when the force application end of the second handle rotates and closes relative to the first handle, the raising end of the second handle drives the clamping and pulling mechanism to move towards the rivet pulling direction;

the relative position of the connecting shaft and the pivot shaft is set as follows:

the first stress point is located at the axis of the connecting shaft, the second stress point is located above the second handle, the first handle and the second handle have the maximum grip distance when being folded, and the ratio of the distance between the first stress point and the axis of the pivoting shaft to the distance between the second stress point and the axis of the pivoting shaft is 1:16-1: 25;

or

The distance between the axis of the connecting shaft and the axis of the pivoting shaft is 8-12 mm.

Further, the clamping and pulling mechanism comprises a pulling sleeve, and the pulling sleeve is connected with the raising end through the connecting shaft and drives the clamping and pulling mechanism to move; at least one of the pull sleeve or the pivot shaft is provided with a space avoiding groove at the position where the pull sleeve is closest to the pivot shaft in space.

Further, the position where the force application end of the second handle rotates to be opened to the maximum relative to the first handle is a first position, the position where the force application end of the second handle is folded to the maximum relative to the first handle is a second position, and the angle value of the second handle rotating to the second position relative to the first handle from the first position is 20-60 degrees.

Further, the position where the force application end of the second handle is rotated and opened to the maximum relative to the first handle is a first position, the position where the force application end of the second handle is folded to the maximum relative to the first handle is a second position, a line passing through the axis of the pivoting shaft and perpendicular to the movement direction of the clamping and pulling mechanism is an auxiliary line, and the auxiliary line is in the same plane with the first handle, the second handle and the axis of the pivoting shaft; the angle between the lifting end of the second handle and the auxiliary line is a first angle, the angle between the lifting end of the second handle and the auxiliary line is a second angle, and the first angle and the second angle are located on two sides of the auxiliary line.

Further wherein the first angle value is 10 ° -30 ° and the second angle value is 10 ° -30 °.

Further wherein the first angle value is 22 ° and the second angle value is 22 °.

Further wherein the first angle value is equal to the second angle value.

Further, wherein the material of the pivot shaft is one of 35 steel, 45 steel or 40 Cr.

The utility model also provides another hand riveter, which comprises a first handle, a second handle and a clamping and pulling mechanism,

the second handle is rotatable about a pivot axis relative to the first handle;

the second handle is divided into a force application end and a lifting end by the pivot shaft, and the lifting end is connected with the clamping and pulling mechanism through a connecting shaft; when the force application end of the second handle rotates and opens relative to the first handle, the raising end of the second handle drives the clamping and pulling mechanism to move towards the riveting direction; when the force application end of the second handle rotates and closes relative to the first handle, the raising end of the second handle drives the clamping and pulling mechanism to move towards the rivet pulling direction;

the clamping and pulling mechanism comprises a spring, a hollow ejector rod, a separated clamping jaw and a pulling sleeve, wherein the spring, the hollow ejector rod and the separated clamping jaw are sequentially arranged in the pulling sleeve from top to bottom; the clamping jaw and the pulling sleeve are provided with mutually matched inclined planes, and the spring elastically presses the separated clamping jaw to the mutually matched inclined planes through the hollow ejector rod;

the hand riveter also comprises a specification head used for separating the clamping jaws, a groove is formed in the end face of the specification head, the depth of the groove is not more than 2mm, and the width of the groove is not less than 5 mm.

Further, the groove is one of an arc groove, a step groove or a chamfer groove.

The utility model has the advantages of: on the premise of ensuring normal function and comfortable use, the reasonable distance between the raising end and the supporting axis is selected, so that the rivet is more labor-saving; meanwhile, the end face of the specification head is provided with the groove to meet the rivet pulling requirements of the rivets with multiple specifications, so that the rivet pulling machine does not need to replace the specification head when pulling the rivets with multiple specifications.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings, so as to fully understand the objects, the features and the effects of the present invention.

Drawings

Fig. 1 is a schematic view of a space avoiding groove adopted by a pivot shaft of a preferred embodiment of the invention;

FIG. 2 is a schematic view of the space avoiding groove with various forms of pivotal axis according to a preferred embodiment of the present invention;

fig. 3 is a schematic view of a space avoiding groove adopted by the pull sleeve according to a preferred embodiment of the present invention;

fig. 4 is a schematic perspective view of a space avoiding groove adopted by the pull sleeve according to a preferred embodiment of the present invention;

fig. 5 shows a riveter according to a preferred embodiment of the present invention;

FIG. 6 shows the first and second handles of the riveter according to a preferred embodiment of the present invention in an open position;

FIG. 7 shows the closed position of the first and second handles of the riveter according to a preferred embodiment of the present invention;

fig. 8 is a hand riveter according to another preferred embodiment of the invention (in which the end face of the gauge head is provided with a recess);

FIG. 9 is a perspective view of a gauge head with a grooved end face;

FIG. 10 is a schematic cross-sectional view of a gauge head having an end face provided with various forms of grooves;

FIG. 11 shows the adaptation of a gauge head with a recess in the end face to different gauges of rivets.

Detailed Description

The technical contents of the preferred embodiments of the present invention will be more clearly understood and appreciated by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments described herein.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components may be exaggerated where appropriate in the figures to improve clarity.

As shown in fig. 5, the hand riveter of one embodiment of the present invention includes a first handle 1, a second handle 2 and a clamping and pulling mechanism,

the first handle 1 is fixedly connected with or integrated with a shell 4 for limiting the clamping and pulling mechanism, and the second handle 2 can rotate around a pivot shaft 31 relative to the first handle 1.

The utility model relates to a device taking lever upwarping as a principle, wherein a pivoting shaft 31 is a supporting point of the lever, a second handle 2 is divided into a force application end and an upwarping end by the pivoting shaft 31, and the upwarping end is connected with a clamping and pulling mechanism through a connecting shaft 32; when the force application end of the second handle 2 rotates and opens relative to the first handle 1, the raising end of the second handle 2 drives the clamping and pulling mechanism to move towards the riveting direction; when the force application end of the second handle 2 rotates and closes relative to the first handle 1, the raising end of the second handle 2 drives the clamping and pulling mechanism to move towards the rivet pulling direction. The first force point is located at the axis of the connecting shaft 32, the second force point is located above the second handle 2, and the first handle 1 and the second handle 2 have the maximum grip distance when being folded. The rivet feeding direction is a downward direction as shown in fig. 5, and the rivet pulling direction is an upward direction as shown in fig. 5.

In order to realize a larger lever ratio and achieve the purpose of labor saving, the distance between the raising end and the axis of the pivot shaft 31 is more and more labor saving, but the rivet pulling stroke is reduced, the rivet pulling times are increased, when the stroke is reduced to a certain distance, the normal rivet pulling function is lost, and in order to increase the rivet pulling stroke, the opening of the first handle 1 and the second handle 2 is too large, so that the clamping is uncomfortable; meanwhile, the larger the distance between the force application end and the axis of the pivot shaft 31 is, the more labor is saved, but the rivet gun is enlarged, and the operation is inconvenient. In order to save labor and increase the clamping comfort, in some embodiments, the ratio of the distance between the first force-bearing point and the axis of the pivot shaft 31 to the distance between the second force-bearing point and the axis of the pivot shaft 31 is optimally 1:16-1: 25. In other embodiments, the distance between the axis of the connecting shaft 32 and the axis of the pivot shaft 31 is limited to 8mm-12 mm. In further embodiments, it is desirable to simultaneously satisfy: the ratio of the distance between the first stress point and the axis of the pivot shaft 31 to the distance between the second stress point and the axis of the pivot shaft 31 is 1:16-1:25, and the distance between the axis of the connecting shaft 32 and the axis of the pivot shaft 31 is limited to 8mm-12 mm. The reasonable numerical selection can ensure that the riveting times are reasonable and the holding is comfortable.

As shown in fig. 5, the clamping and pulling mechanism further includes a pulling sleeve 51, and the pulling sleeve 51 is connected to the raising end through the connecting shaft 32 and drives the clamping and pulling mechanism to move; the position where the pull sleeve 51 is spatially closest to the pivot shaft 31 is referred to as an interference region. The distance between the raised end and the axial center of the pivot shaft 31 is too close, so that the processing is difficult to a certain extent, and meanwhile, the pivot shaft 31 interferes with the pull sleeve 51 of the clamping and pulling mechanism 5. The larger the shaft diameter of the pivot shaft 31, the better the bearing strength and the wear resistance, so it is not desirable to reduce the interference by reducing the shaft diameter of the pivot shaft. To solve the interference problem, in some embodiments, at least one of the pull sleeve 51 or the pivot shaft 31 is provided with a space avoiding groove in the interference area, as shown in fig. 1, 2, 3 and 4. As shown in fig. 1, the pivot shaft 31 can be thinned at the middle part and at the two ends to realize space avoidance; as shown in fig. 2, the pivot shaft 31 may also employ other similar relief structures to reduce the effects of interference, and the form of the space relief groove is not intended to be limited herein. As shown in fig. 3 and 4, the pull sleeve 51 is additionally provided with a space avoiding groove 511 in the interference region.

To reduce the interference between the pull sleeve 51 and the pivot shaft 31, in some embodiments, the shaft diameter of the pivot shaft 31 is reduced, and in order to achieve the same strength, the pivot shaft needs to be made of a material with higher strength or a higher heat treatment requirement, and optionally, the original 35 steel is changed into 45 steel or a high-strength material similar to 40Cr, and optionally, the original HRC35-40 is changed into HRC40-50 or a higher heat treatment similar to the original HRC 40-50. Meanwhile, similarly, in other embodiments, the diameter of the pull sleeve 51 may also be reduced, the clamping and pulling mechanisms matched with the pull sleeve 51 need to be reduced in the radial direction, and similarly, the pull sleeve 51 and the clamping and pulling mechanisms need to be made of high-strength materials, which undoubtedly increases the cost of the riveter.

A line passing through the axis of the pivot shaft 31 and perpendicular to the movement direction of the clamping and pulling mechanism is an auxiliary line 9, and the auxiliary line 9 is in the same plane with the axes of the first handle 1, the second handle 2 and the pivot shaft 31. As shown in fig. 6, when the horizontal auxiliary line 9 passing through the axis of the pivot shaft 31 is in a maximum state by opening the first handle 1 and the second handle 2, that is, in an initial state of the rivet, an included angle a is formed between a connecting shaft 32 and a center connecting line of the pivot shaft 31 and the auxiliary line 9, a height of the rivet in a vertical direction is h1, and h1 is P si na, where P is a distance between the connecting shaft 32 and the center connecting line of the pivot shaft 31.

The second handle shown in fig. 6 is pressed down to the maximum extent to form the final state of the rivet shown in fig. 7, an included angle b is formed between the connecting shaft 32 and the center connecting line of the pivot shaft 31 and the horizontal auxiliary line 9, the height of the rivet in the vertical direction is h2, and h2 is P × sinb, wherein P is the distance between the connecting shaft 32 and the center connecting line of the pivot shaft 31.

When the included angles a and b are respectively arranged at two sides of the horizontal auxiliary line, the moving distance of the pulling rivet in the vertical direction is h1+ h2 ═ P (sina + sinb). When the included angles a and b are respectively on the same side of the horizontal auxiliary line, the moving distance of the pulling rivet in the vertical direction is the absolute value of the difference value between h1 and h 2. In some embodiments, under the condition that the included angles a and b are respectively on the same side of the horizontal auxiliary line, at this time, the deflection of one side of the pull sleeve 51 is large, so that the pull sleeve 51 is easily clamped, and meanwhile, the length of the pull rivet is also short, so in other optimized embodiments, the included angles a and b are respectively on two sides of the horizontal auxiliary line, and more preferably, the included angle a is equal to the included angle b; when the included angle a is equal to the included angle b, the deflection amount of the two sides of the pull sleeve in the pull riveting process is small. In some embodiments, the angle value a + b ranges from 20 to 60, where angle a and angle b each range from 10 to 30. In some embodiments, the angle value a-b-22 ° is selected so that the riveter has the appropriate number of rivetings.

As shown in fig. 5, the clamping and pulling mechanism further comprises a spring 52, a hollow mandril 53 and a separated clamping jaw 54, wherein the spring 52, the hollow mandril 53 and the separated clamping jaw 54 are sequentially arranged in the pulling sleeve 51 from top to bottom; the clamping jaw 54 and the pull sleeve 51 are provided with mutually matched inclined surfaces, one end of the spring 52 elastically presses the clamping jaw 54 to the matched inclined surface through the hollow mandril 53, and the other end of the spring 52 is connected with the connecting shaft 32. Specifically, the connecting shaft 32 is provided with a groove at a position contacting the spring 52, and an end surface of the groove contacts the other end of the spring 52 and can force the spring 52. The pull sleeve 51 is disposed in the housing 4. The riveter also includes a gauge head 6 for separating the jaws 54.

The gauge head 6 is used to separate the jaws 54, and the size of the opening of the jaws 54 is adjusted by the length of the gauge head 6 extending into the housing 4. Conventionally, for more efficient operation, rivets of different specifications have different corresponding specification heads. In the embodiment of the utility model, the rivet pulling work of rivets with different specifications can be realized by only adopting one specification head. For example, when the rivet is changed from 4.8 gauge to 2.4 gauge, the opening between the jaws 54 needs to be reduced, which is achieved by reducing the length of the gauge head 6 extending into the housing 4, and the distance between the end face of the gauge head 6 and the jaws will be increased; with the first 6 orientation of specification make with between the clamping jaw between the direction of interval grow remove certain distance after, the clamping jaw begins atress 2.4 rivet stem, because clamping jaw 54 and the first 6 terminal surface distance grow of specification to the rivet stem that the messenger stretched into in the clamping jaw 54 shortens, leads to the effective contact surface diminish of clamping jaw 54 and the rivet stem that stretches into in the clamping jaw 54 or even contactless, can't normally or effectual grabbing rivet 10 at last, loses the rivet function this moment. In order to avoid the above situation, the utility model discloses a first 6 terminal surfaces of specification increase the recess and adjust the stroke of rivet 10, let different specification rivets 10 can freely adjust the length of the rivet 10 that stretches into in clamping jaw 54.

In the embodiment of the utility model, the end face of the specification head 6 is additionally provided with a groove to meet the rivet pulling requirements of rivets 10 with different specifications; as shown in fig. 11, the diameter of the rivet 10 decreases from left to right in the drawing, and it can be seen that the end face of the cap of the rivet 10 can be well embedded into the groove 61, the length of the rivet 10 entering the clamping jaw 54 is adjusted, and the rivet pulling work can be effectively performed. Because the rivet-pulling requirement of different specification rivets can be satisfied to a specification head, consequently the utility model discloses an exempt from to trade the rivet gun of specification head for the rivet gun uses more conveniently.

The depth of the groove on the end face of the standard head 6 is not too deep, otherwise, the cap of the rivet is embedded into the groove too deep, and the appearance of the standard head and the strength of the rivet pulling are affected; meanwhile, the width of the groove is not too small, otherwise, the rivet cap with small specification cannot effectively enter the groove. In some embodiments, the depth of the groove is no greater than 2mm and the width of the groove is no less than 5 mm.

As shown in fig. 8, 9, 10 and 11, grooves are additionally formed on the end faces of the gauge heads 6; as shown in fig. 10, the groove 61 may be one of a circular arc groove, a stepped groove, or a chamfered groove, or other similar arrangement.

As shown in fig. 5, the hand riveter further comprises a torsion spring 7, the torsion spring 7 is fixed by a fixing shaft 33, and the torsion spring 7 is in elastic contact with the first handle and the second handle respectively; when the first and second handles are fully opened, the elastic force of the torsion spring 7 is fully released. As shown in fig. 8, the hand riveter further comprises a fixing member 8, when the hand riveter is in a non-working state, the first handle and the second handle are folded, and the fixing member 8 overcomes the elasticity of the torsion spring 7 to fix the first handle and the second handle.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the teachings of this invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. A hand riveter is characterized by comprising a first handle, a second handle and a clamping and pulling mechanism,

the second handle is rotatable about a pivot axis relative to the first handle;

the second handle is divided into a force application end and a lifting end by the pivot shaft, and the lifting end is connected with the clamping and pulling mechanism through a connecting shaft; when the force application end of the second handle rotates and opens relative to the first handle, the raising end of the second handle drives the clamping and pulling mechanism to move towards the riveting direction; when the force application end of the second handle rotates and closes relative to the first handle, the raising end of the second handle drives the clamping and pulling mechanism to move towards the rivet pulling direction;

the relative position of the connecting shaft and the pivot shaft is set as follows:

the first stress point is located at the axis of the connecting shaft, the second stress point is located above the second handle, the first handle and the second handle have the maximum grip distance when being folded, and the ratio of the distance between the first stress point and the axis of the pivoting shaft to the distance between the second stress point and the axis of the pivoting shaft is 1:16-1: 25;

or

The distance between the axis of the connecting shaft and the axis of the pivoting shaft is 8-12 mm.

2. The blind rivet gun of claim 1, wherein the clamping and pulling mechanism comprises a pulling sleeve, and the pulling sleeve is connected with the raised end through the connecting shaft and drives the clamping and pulling mechanism to move; at least one of the pull sleeve or the pivot shaft is provided with a space avoiding groove at the position where the pull sleeve is closest to the pivot shaft in space.

3. The riveter of claim 1 wherein the force applying end of the second handle is rotated to a first position at which it is maximally open relative to the first handle and a second position at which it is maximally closed relative to the first handle, the second handle being rotated from the first position to the second position by an angle of 20 ° -60 °.

4. The blind rivet gun of claim 1, wherein the position where the force application end of the second handle is rotated to be opened to the maximum relative to the first handle is the first position, the position where the force application end of the second handle is folded to the maximum relative to the first handle is the second position, and a line passing through the pivot axis and perpendicular to the movement direction of the clamping and pulling mechanism is an auxiliary line, and the auxiliary line is in the same plane with the first handle, the second handle and the pivot axis; the angle between the lifting end of the second handle and the auxiliary line is a first angle, the angle between the lifting end of the second handle and the auxiliary line is a second angle, and the first angle and the second angle are located on two sides of the auxiliary line.

5. A riveter according to claim 4 wherein the first angle value is from 10 ° to 30 ° and the second angle value is from 10 ° to 30 °.

6. The riveter of claim 4 wherein the first angle value is 22 ° and the second angle value is 22 °.

7. The riveter of claim 4, wherein the first angle value is equal to the second angle value.

8. A riveter according to claim 1 wherein the material of the pivot shaft is one of 35 steel, 45 steel or 40 Cr.

9. A hand riveter comprises a first handle, a second handle and a clamping and pulling mechanism,

the second handle is rotatable about a pivot axis relative to the first handle;

the second handle is divided into a force application end and a lifting end by the pivot shaft, and the lifting end is connected with the clamping and pulling mechanism through a connecting shaft; when the force application end of the second handle rotates and opens relative to the first handle, the raising end of the second handle drives the clamping and pulling mechanism to move towards the riveting direction; when the force application end of the second handle rotates and closes relative to the first handle, the raising end of the second handle drives the clamping and pulling mechanism to move towards the rivet pulling direction;

the clamping and pulling mechanism comprises a spring, a hollow ejector rod, a separated clamping jaw and a pulling sleeve, wherein the spring, the hollow ejector rod and the separated clamping jaw are sequentially arranged in the pulling sleeve from top to bottom; the clamping jaw and the pulling sleeve are provided with mutually matched inclined planes, and the spring elastically presses the separated clamping jaw to the mutually matched inclined planes through the hollow ejector rod;

the hand riveter also comprises a specification head used for separating the clamping jaws, a groove is formed in the end face of the specification head, the depth of the groove is not more than 2mm, and the width of the groove is not less than 5 mm.

10. The riveter of claim 9 wherein the recess is one of a circular arc recess, a stepped recess or a chamfered recess.

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