A rivet gun

Abstract

The application discloses a pull-riveting gun and relates to the field of hand tools, which comprises a first handle, a second handle and a clamping and pulling mechanism, the second handle can rotate relative to the first handle around a pivot shaft, the second handle is spaced by the pivot shaft into a force applying end and a lifting end, the lifting end is connected with the clamping and pulling mechanism through a connecting shaft, when the force applying end of the second handle rotates relative to the first handle to open, the lifting end of the second handle drives the clamping and pulling mechanism to move in a riveting direction, and when the force applying end of the second handle rotates relative to the first handle to close, the lifting end of the second handle drives the clamping and pulling mechanism to move in a pull-riveting direction. The pull-riveting gun is labor-saving and comfortable to hold when pull-riveting through reasonable setting.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hand tools, in particular to a pull rivet gun. BACKGROUND

[0002] The conventional pull rivet gun includes a handle and a clamping and pulling mechanism, and when in use, the handle is opened to pull up the clamping and pulling mechanism, and the clamping and pulling mechanism clamps and pulls off the rivet. The pull rivet gun is mostly a device based on the principle of a lever, and in order to achieve a larger lever ratio and save labor, the lifting end is closer to the supporting axis, that is, the closer the hole distance is, the more labor is saved, but it also makes the pull rivet stroke smaller and the pulling frequency increases, and when the stroke is small to a certain distance, the normal pull rivet function will be lost, and the handle opening is too large and the clamping is not comfortable.

[0003] Therefore, the technical personnel in the art is committed to developing a pull rivet gun, which is more labor-saving and more comfortable to operate; and through the design of the specification head, one specification head has multiple purposes. SUMMARY

[0004] In view of the above defects of the prior art, the technical problem to be solved by the present application is to provide a pull rivet gun which is more labor-saving and does not need to change the specification head during pull riveting.

[0005] To achieve the above-mentioned purpose, the present application provides a pull rivet gun, comprising a first handle, a second handle and a clamping and pulling mechanism,

[0006] The second handle can rotate relative to the first handle about a pivot axis;

[0007] The second handle is spaced by the pivot axis into a force applying end and a lifting end, and the lifting end is connected to the clamping and pulling mechanism through a connecting shaft; when the force applying end of the second handle is rotated and opened relative to the first handle, the lifting end of the second handle drives the clamping and pulling mechanism to move in the rivet insertion direction; when the force applying end of the second handle is rotated and closed relative to the first handle, the lifting end of the second handle drives the clamping and pulling mechanism to move in the rivet pulling direction;

[0008] The relative positions of the connecting shaft and the pivot axis are set as:

[0009] The first force point is located at the axis of the connecting shaft, the second force point is located above the second handle, and when the first handle and the second handle are closed, the first force point has a maximum grip distance from the axis of the pivot axis, and the ratio of the distance between the first force point and the axis of the pivot axis to the distance between the second force point and the axis of the pivot axis is 1:16-1:25;

[0010] Or

[0011] The distance between the axis of the connecting shaft and the axis of the pivot axis is 8mm-12mm.

[0012] Further, the puller mechanism comprises a pull sleeve connected with the lifting end through the connecting shaft and driving the puller 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.

[0013] Further, the maximum opening position of the force applying end of the second handle relative to the first handle is a first position, and the maximum closing position of the force applying end of the second handle relative to the first handle is a second position, and the angle value of the second handle rotating from the first position to the second position relative to the first handle is 20°-60°.

[0014] Further, the maximum opening position of the force applying end of the second handle relative to the first handle is a first position, and the maximum closing position of the force applying end of the second handle relative to the first handle is a second position, and the angle value of the second handle rotating from the first position to the second position relative to the first handle is 20°-60°.

[0015] Further, the maximum opening position of the force applying end of the second handle relative to the first handle is a first position, and the maximum closing position of the force applying end of the second handle relative to the first handle is a second position, and the angle value of the second handle rotating from the first position to the second position relative to the first handle is 20°-60°.

[0016] Further, the maximum opening position of the force applying end of the second handle relative to the first handle is a first position, and the maximum closing position of the force applying end of the second handle relative to the first handle is a second position, and the angle value of the second handle rotating from the first position to the second position relative to the first handle is 20°-60°.

[0017] Further, the maximum opening position of the force applying end of the second handle relative to the first handle is a first position, and the maximum closing position of the force applying end of the second handle relative to the first handle is a second position, and the angle value of the second handle rotating from the first position to the second position relative to the first handle is 20°-60°.

[0018] Further, the pivot shaft is made of one of 35 steel, 45 steel or 40Cr.

[0019] The application further provides another pull rivet gun, which comprises a first handle, a second handle and a puller mechanism,

[0020] The second handle can rotate relative to the first handle around a pivot shaft.

[0021] The second handle is spaced by a pivot shaft into a force applying end and a lifting end, and the lifting end is connected with the clamping and pulling mechanism through a connecting shaft; when the force applying end of the second handle is rotated to open relative to the first handle, the lifting end of the second handle drives the clamping and pulling mechanism to move to a rivet inserting direction; when the force applying end of the second handle is rotated to close relative to the first handle, the lifting end of the second handle drives the clamping and pulling mechanism to move to a rivet pulling direction;

[0022] The clamping and pulling mechanism comprises a spring, a hollow top rod, separated clamping jaws and a pulling sleeve, the spring, the hollow top rod and the separated clamping jaws are sequentially arranged in the pulling sleeve from top to bottom; the clamping jaws and the pulling sleeve are provided with mutually matched inclined surfaces, and the spring elastically presses the separated clamping jaws to the mutually matched inclined surfaces through the hollow top rod;

[0023] The rivet pulling gun further comprises a specification head for separating the clamping jaws, and the specification head is provided with a groove in an end face, the depth of the groove is not greater than 2 mm, and the width of the groove is not less than 5 mm.

[0024] Further, the groove is one of a circular arc groove, a stepped groove or a chamfered groove.

[0025] The beneficial technical effects of the present application are that, under the premise of ensuring normal function and comfortable use, a reasonable distance between the lifting end and the supporting shaft center is selected, so that rivet pulling is more labor-saving; meanwhile, the groove is arranged in the end face of the specification head to adapt to the rivet pulling requirements of multiple specifications of rivets, so that the rivet pulling machine does not need to replace the specification head when pulling multiple specifications of rivets.

[0026] The concept, specific structure and generated technical effects of the present application will be further described below in combination with the drawings, so as to fully understand the purpose, features and effects of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a space avoiding groove schematic diagram adopted by a pivot shaft of a preferred embodiment of the present application;

[0028] Figure 2 is a space avoiding groove schematic diagram adopted by a pivot shaft of a preferred embodiment of the present application in multiple forms;

[0029] Figure 3 is a space avoiding groove schematic diagram adopted by a pulling sleeve of a preferred embodiment of the present application;

[0030] Figure 4 is a space avoiding groove schematic diagram adopted by a pulling sleeve of a preferred embodiment of the present application in a three-dimensional form;

[0031] Figure 5 is a rivet pulling gun of a preferred embodiment of the present application;

[0032] Figure 6 the open state of the first handle and the second handle of the pull-rivet gun according to a preferred embodiment of the present application;

[0033] Figure 7 the closed state of the first handle and the second handle of the pull-rivet gun according to a preferred embodiment of the present application;

[0034] Figure 8 the pull-rivet gun according to another preferred embodiment of the present application (wherein the end surface of the specification head is provided with a groove);

[0035] Figure 9 the perspective view of the specification head provided with a groove in the end surface;

[0036] Figure 10 the cross-sectional view of the specification head provided with various forms of grooves in the end surface;

[0037] Figure 11 the specification head provided with a groove in the end surface and its adaptability to different specifications of rivets; DETAILED DESCRIPTION

[0038] The preferred embodiments of the present application are described below with reference to the accompanying drawings, so that the technical contents of the present application can be made more clear and easy to understand. The present application can be embodied in many different forms, and the scope of protection of the present application is not limited to the embodiments described herein.

[0039] In the drawings, the same components are designated by the same reference numerals, and components having similar structures or functions are designated by similar reference numerals. The size and thickness of each component shown in the drawings are arbitrarily shown, and the present application is not limited to the size and thickness of each component. In order to make the drawings clearer, the thickness of some components is exaggerated in some places in the drawings.

[0040] As shown in FIG. 1, a pull-rivet gun according to an embodiment of the present application includes a first handle 1, a second handle 2, and a clamping and pulling mechanism 3. Figure 5

[0041] The first handle 1 is fixedly connected to or integrated with a housing 4 defining the clamping and pulling mechanism 3, and the second handle 2 is rotatable with respect to the first handle 1 about a pivot axis 31.

[0042] ​The present application is a device based on the principle of lever lifting, wherein the pivot axis 31 is the supporting point of the lever, the second handle 2 is spaced from the pivot axis 31 as the force applying end and the lifting end, and the lifting end is connected with the clamping and pulling mechanism through the connecting shaft 32; when the force applying end of the second handle 2 is rotated relative to the first handle 1 to open, the lifting end of the second handle 2 drives the clamping and pulling mechanism to move in the rivet feeding direction; when the force applying end of the second handle 2 is rotated relative to the first handle 1 to close, the lifting end of the second handle 2 drives the clamping and pulling mechanism to move in the rivet pulling direction. The first force receiving point is located at the axis center of the connecting shaft 32, the second force receiving point is located above the second handle 2, and the maximum grip distance is reached when the first handle 1 and the second handle 2 are closed. It should be noted that the rivet feeding direction is the downward direction as shown in Figure 5 , and the rivet pulling direction is the upward direction as shown in Figure 5 .

[0043] In order to achieve a larger lever ratio and save effort, the closer the distance between the lifting end and the axis center of the pivot axis 31, the more effort saved, but it will also make the rivet pulling stroke smaller and the rivet pulling frequency higher. When the stroke is small to a certain distance, the normal rivet pulling function will be lost. In order to increase the rivet pulling stroke, the opening of the first handle 1 and the second handle 2 is too large, causing uncomfortable clamping. At the same time, the larger the distance between the force applying end and the axis center of the pivot axis 31, the more effort saved, but it will also make the rivet gun larger, leading to inconvenient operation. In order to save effort while increasing the comfort of clamping, in some embodiments, the ratio of the distance between the first force receiving point and the axis center of the pivot axis 31 to the distance between the second force receiving point and the axis center of the pivot axis 31 is 1:16-1:25. In other embodiments, the distance between the axis center of the connecting shaft 32 and the axis center of the pivot axis 31 is limited to 8mm-12mm. In still other embodiments, the ratio of the distance between the first force receiving point and the axis center of the pivot axis 31 to the distance between the second force receiving point and the axis center of the pivot axis 31 is 1:16-1:25, and the distance between the axis center of the connecting shaft 32 and the axis center of the pivot axis 31 is limited to 8mm-12mm. These reasonable numerical selections can make the rivet pulling frequency more reasonable, while taking into account the comfort of holding.

[0044] As shown in Figure 5 , the clamping and pulling mechanism further includes a pulling sleeve 51, which is connected with the lifting end through the connecting shaft 32 and drives the clamping and pulling mechanism to move; the position where the pulling sleeve 51 is closest to the pivot axis 31 in space is called the interference area. If the distance between the lifting end and the axis center of the pivot axis 31 is too close, there will be certain difficulties in processing, and the pivot axis 31 and the pulling sleeve 51 of the clamping and pulling mechanism 5 will interfere. The larger the shaft diameter of the pivot axis 31, the better the strength and wear resistance, so it is not desirable to reduce the interference by reducing the shaft diameter of the pivot axis. As shown in Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, in order 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. As shown Figure 1 As shown, the pivot shaft 31 can be tapered in the middle and tapered at both ends to achieve space avoidance; As shown Figure 2 As shown, the pivot shaft 31 can also use other similar avoidance structures to reduce the influence of interference, and the form of the space avoiding groove is not intended to be limited here. As shown Figure 3 And Figure 4 As shown, the pull sleeve 51 is additionally provided with a space avoiding groove 511 in the interference area.

[0045] In order 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 at this time, in order to achieve the same strength, the pivot shaft needs to use higher strength material, or use higher heat treatment requirements, and optionally, the original 35 steel is changed to 45 steel or 40Cr similar high strength material, and optionally, the original HRC35-40 is changed to HRC40-50 or similar higher heat treatment. At the same time, similarly, in other embodiments, the diameter of the pull sleeve 51 can also be reduced, and the clamping and pulling mechanism matched with the pull sleeve 51 needs to be reduced in the radial direction, and similarly, the pull sleeve 51 and the clamping and pulling mechanism need to use high strength material, which will undoubtedly increase the cost of the pull riveter.

[0046] The line through the center 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 as the first handle 1, the second handle 2 and the center of the pivot shaft 31. As shown Figure 6 As shown, the horizontal auxiliary line 9 through the center of the pivot shaft 31, when the first handle 1 and the second handle 2 are opened to the maximum state, that is, the initial state of the pull riveting, the connecting shaft 32 and the center line of the pivot shaft 31 form an angle a with the auxiliary line 9, and the vertical height of the pull riveting is h1, h1=P*sin a, wherein P is the distance between the connecting shaft 32 and the center line of the pivot shaft 31.

[0047] As shown in Figure 6 As shown in Figure 7 As shown, the connecting shaft 32 and the center line of the pivot shaft 31 form an angle b with the horizontal auxiliary line 9, and the vertical height of the pull riveting is h2, h2=P*sin b, wherein P is the distance between the connecting shaft 32 and the center line of the pivot shaft 31.

[0048] The distance of the vertical direction movement of the pull rivet when the included angles a and b are on the two sides of the horizontal auxiliary line is h1+h2=P*(sina+sinb). The distance of the vertical direction movement of the pull rivet when the included angles a and b are on the same side of the horizontal auxiliary line is the absolute value of the difference between h1 and h2. In some embodiments, when the included angles a and b are on the same side of the horizontal auxiliary line, the deflection of one side of the pull sleeve 51 is large, which can easily cause the pull sleeve 51 to be stuck, and the length of the pull rivet is also short. Therefore, in other optimized embodiments, the included angles a and b are on the 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 of the two sides of the pull sleeve during the pull rivet process is small. In some embodiments, the angle value a+b is in the range of 20°-60°, and the angle a and the angle b are in the range of 10°-30°, respectively. In some embodiments, the angle value a=b=22°, and the selection of the angles a and b makes the pull riveter have a suitable number of pull rivet times.

[0049] As shown in Figure 5 The pull mechanism further includes a spring 52, a hollow top rod 53, and separate clamping jaws 54, which are sequentially arranged in the pull sleeve 51 from top to bottom. The clamping jaws 54 and the pull sleeve 51 are provided with inclined surfaces that cooperate with each other. One end of the spring 52 elastically presses the clamping jaws 54 to the cooperating inclined surfaces through the hollow top rod 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 the position in contact with the spring 52, and the end surface of the groove is in contact with the other end of the spring 52 and can make the spring 52 bear force. The pull sleeve 51 is arranged in the housing 4. The pull riveter further includes a gauge head 6 for separating the clamping jaws 54.

[0050] The specification head 6 is used to separate the clamping jaw 54, and the opening size of the clamping jaw 54 is adjusted by the length of the specification head 6 extending into the shell 4. Conventionally, in order to work more efficiently, different specifications of rivets correspond to different specification heads. However, in the embodiment of the present application, only one specification head can be used to realize the rivet setting work of different specifications of rivets. For example, when the rivet changes from 4.8 specification to 2.4 specification, the opening between the clamping jaw 54 needs to be smaller, at this time, the length of the specification head 6 extending into the shell 4 is reduced to realize it, and the distance between the end face of the specification head 6 and the clamping jaw will become larger. After the specification head 6 is moved to a certain distance in the direction of making the distance between the end face of the specification head 6 and the clamping jaw larger, the clamping jaw starts to bear the 2.4 rivet rod, and because the distance between the clamping jaw 54 and the end face of the specification head 6 becomes larger, the rivet rod extending into the clamping jaw 54 becomes shorter, which causes the effective contact surface between the clamping jaw 54 and the rivet rod extending into the clamping jaw 54 to become smaller or even no contact, and finally the clamping jaw 54 cannot normally or effectively grab the rivet 10, at this time, the rivet setting function is lost. In order to avoid the above situation, the specification head 6 of the present application increases the groove on the end face to adjust the stroke of the rivet 10, so that different specifications of rivets 10 can freely adjust the length of the rivet 10 extending into the clamping jaw 54.

[0051] In the embodiment of the present application, the groove is additionally provided on the end face of the specification head 6 to meet the rivet setting requirements of different specifications of rivets 10. As shown in Figure 11 , the diameters of the rivets 10 from left to right in the figure become smaller in turn, and it can be seen that no matter which specification of rivet, the end face of the cap of the rivet 10 can be well embedded in the groove 61, the length of the rivet 10 entering the clamping jaw 54 is adjusted, and the rivet setting work can be effectively performed. Because one specification head can meet the rivet setting requirements of different specifications of rivets, the present application realizes the rivet setting gun without changing the specification head, and makes the rivet setting gun more convenient to use.

[0052] The depth of the groove on the end face of the specification head 6 should not be too deep, otherwise the cap of the rivet will be embedded in the groove too deeply, which will affect the appearance of the specification head and the strength of the rivet setting. At the same time, the width of the groove should not be too small, otherwise the cap of the small specification rivet cannot effectively enter the groove. In some embodiments, the depth of the groove is not greater than 2 mm, and the width of the groove is not less than 5 mm.

[0053] As shown in Figure 8 , Figure 9 , Figure 10 and Figure 11 , the groove is additionally provided on the end face of the specification head 6; as shown in Figure 10 , the groove 61 can be one of a circular arc groove, a stepped groove or a chamfered groove, or other similar settings.

[0054] As shown in Figure 5As shown, the pull-rivet gun further comprises a torsion spring 7 fixed by a fixed shaft 33, and the torsion spring 7 is in elastic contact with the first handle and the second handle respectively; when the first handle and the second handle are fully opened, the elastic force of the torsion spring 7 is fully released. Figure 8 As shown, the pull-rivet gun further comprises a fixing member 8, when the pull-rivet gun is in a non-working state, the first handle and the second handle are folded, and the fixing member 8 fixes the first handle and the second handle against the elastic force of the torsion spring 7.

[0055] The above describes the preferred embodiments of the present application in detail. It should be understood that those of ordinary skill in the art can make various modifications and changes without any creative work based on the concept of the present application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment based on the concept of the present application and the prior art should be within the protection scope defined by the claims.

Claims

1. A pull-rim gun, characterized in that, The first handle, the second handle and the clamping and pulling mechanism, The second handle can rotate relative to the first handle around a pivot axis; The second handle is spaced by the pivot axis into a force applying end and a lifting end, the lifting end is connected with the clamping and pulling mechanism through a connecting shaft; when the force applying end of the second handle rotates relative to the first handle to open, the lifting end of the second handle drives the clamping and pulling mechanism to move in the rivet inserting direction; when the force applying end of the second handle rotates relative to the first handle to close, the lifting end of the second handle drives the clamping and pulling mechanism to move in the rivet pulling direction; The relative position of the connecting shaft and the pivot axis is set as: A first force receiving point is located at the axis center of the connecting shaft, a second force receiving point is located above the second handle, and when the first handle and the second handle are closed, the first force receiving point has a maximum grip distance compared with the second force receiving point, and the ratio of the distance between the first force receiving point and the pivot axis center to the distance between the second force receiving point and the pivot axis center is 1:16-1:25; Or The distance between the axis center of the connecting shaft and the pivot axis is 8mm-12mm; The clamping and pulling mechanism includes a pulling sleeve, the pulling sleeve is connected with the lifting end through the connecting shaft and drives the clamping and pulling mechanism to move; at the position where the pulling sleeve is closest to the pivot axis in space, at least one of the pulling sleeve or the pivot axis is provided with a space avoiding groove; The maximum opening position of the force applying end of the second handle relative to the first handle is a first position, the maximum closing position of the force applying end of the second handle relative to the first handle is a second position, a line passing through the pivot axis and perpendicular to the movement direction of the clamping and pulling mechanism is an auxiliary line, the auxiliary line, the first handle, the second handle and the pivot axis are in the same plane; the angle between the lifting end of the second handle and the auxiliary line at the first position is a first angle, the angle between the lifting end of the second handle and the auxiliary line at the second position is a second angle, the first angle and the second angle are located on the two sides of the auxiliary line.

2. The rivet gun of claim 1, wherein, The maximum opening position of the force applying end of the second handle relative to the first handle is a first position, the maximum closing position of the force applying end of the second handle relative to the first handle is a second position, the angle value of the second handle from the first position relative to the first handle to the second position is 20°-60°.

3. The rivet gun of claim 1, wherein, The first angle value is 10°-30°, and the second angle value is 10°-30°.

4. The rivet gun of claim 1, wherein, The first angle value is 22°, and the second angle value is 22°.

5. The rivet gun of claim 1, wherein, The first angle value is equal to the second angle value.

6. The rivet gun of claim 1, wherein, The material of the pivot axis is one of 35 steel, 45 steel or 40Cr.

7. A spin gun, wherein, The first handle, the second handle and the clamping and pulling mechanism, The second handle can rotate relative to the first handle around a pivot axis; The second handle is spaced by a pivot shaft into a force applying end and a lifting end, and the lifting end is connected with the clamping and pulling mechanism through a connecting shaft; when the force applying end of the second handle is rotated to open relative to the first handle, the lifting end of the second handle drives the clamping and pulling mechanism to move in a rivet driving direction; when the force applying end of the second handle is rotated to close relative to the first handle, the lifting end of the second handle drives the clamping and pulling mechanism to move in a rivet pulling direction; The clamping and pulling mechanism comprises a spring, a hollow top rod, separated clamping jaws and a pulling sleeve, the spring, the hollow top rod and the separated clamping jaws are sequentially arranged in the pulling sleeve from top to bottom; the clamping jaws and the pulling sleeve are provided with mutually matched inclined surfaces, and the spring elastically presses the separated clamping jaws to the mutually matched inclined surfaces through the hollow top rod; The rivet pulling gun further comprises a specification head for separating the clamping jaws, and the specification head is provided with a groove in an end face, the depth of the groove is not greater than 2 mm, and the width of the groove is not less than 5 mm. The pulling sleeve is connected with the lifting end through the connecting shaft and drives the clamping and pulling mechanism to move; at least one of the pulling sleeve or the pivot shaft is provided with a space avoiding groove at a position where the pulling sleeve is closest to the pivot shaft in space. The force applying end of the second handle is rotated to open relative to the first handle to a first position where the opening is maximum, the force applying end of the second handle is rotated to close relative to the first handle to a second position where the closing is maximum, an auxiliary line is perpendicular to the moving direction of the clamping and pulling mechanism through the pivot shaft axis, the auxiliary line is in the same plane with the first handle, the second handle and the pivot shaft axis, the angle between the lifting end of the second handle and the auxiliary line at the first position is a first angle, the angle between the lifting end of the second handle and the auxiliary line at the second position is a second angle, and the first angle and the second angle are located on two sides of the auxiliary line.

8. The rivet gun of claim 7, wherein, The groove is one of a circular arc groove, a stepped groove or a chamfered groove.

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