Pull riveting type tool

Abstract

The utility model discloses a pull riveting type tool, which comprises a base, the guide nozzle is arranged at the front end of the base; the guide nozzle is arranged around the rivet pulling rod in a sleeving manner; the handle is movably connected to the base and is operably connected to the rivet pulling rod, so that the handle can move between a first position where the handle is opened to enable the rivet pulling rod to extend out of the base and a second position where the handle is closed to enable the rivet pulling rod to retreat towards the base; the guide nozzle is provided with an extrusion part, the extrusion part and the rivet pulling rod are configured in the mode that at the first position, the rivet pulling rod can be in threaded connection with a rivet pressing nut or screw pressed and riveted in the rivet pressing part, the extrusion part on the guide nozzle abuts against the corresponding rivet pressing nut or screw part, and along with the movement of the handle from the first position to the second position, the rivet pulling rod retreats to pull the rivet pressing nut or screw. And meanwhile, the extrusion part extrudes and deforms the corresponding pressing rivet nut or screw part towards the direction of the pressing rivet part. By means of the tool, insufficient pressing riveting torsion caused by looseness of a pressing riveting nut or a screw in a pressing riveting piece can be repaired, the repairing time is greatly shortened, and safety is improved.

Description

Technical Field

[0001] This application relates to the field of mechanical manufacturing, and particularly to the field of automobile body manufacturing. Background Art

[0002] In the manufacturing of automobile bodies, especially the inner door panels of doors and firewalls, a stamping riveting process called EPE is adopted in the stamping workshop. It lies in directly stamping nuts or screws into holes of workpieces such as metal plates by stamping instead of by welding. Such nuts and screws are correspondingly called clinch nuts and clinch screws, and the workpieces related to them are called clinched parts; for simplicity hereinafter, they are respectively called EPE nuts, EPE screws and EPE parts.

[0003] For car doors, generally EPE nuts are riveted to the inner door panels to facilitate subsequent installation of interior parts such as liners and soft decoration layers in direct contact with passengers by screwing screws into the nut holes. If it is a firewall between the engine and the cockpit, generally EPE screws are clinched, and a torque wrench can be used for subsequent operation.

[0004] However, when stamping and riveting nuts and screws using the EPE process, problems may occur such as the nuts and screws that are not tightly riveted but are punched into the EPE parts becoming loose in the EPE parts such as inner door panels and firewalls, resulting in insufficient torque. There are various reasons that may cause such insufficient EPE torque. For example, there is a gap between the stamping equipment and the hole; the size of the rivet changes slightly; there is a deviation in the size of the hole in the stamped automobile body inner door panel, resulting in a possible gap between the nut and its mating part; the size of the rivet is slightly smaller, etc. If there is insufficient EPE torque, for example, the screw will not tighten in the EPE nut when installing the decoration layer later.

[0005] This kind of problem is usually found and feedback in the subsequent workshop. So far, to correct this problem, for the inner door panel of the body, it is necessary to remove the liner in the assembly workshop, and then perform secondary welding on the problematic EPE nuts. If the EPE screws of the firewall become loose, it is necessary to perform in-line welding on the white body in the body workshop. For this purpose, a series of operations such as paint breaking, grinding, welding, grinding, and paint repair are required. It takes several hours or even dozens of hours for skilled workers to complete.

[0006] In short, this kind of repair operation takes a long time, will damage the paint surface, and there are also safety hazards because sparks will fly during grinding and welding. Utility Model Content

[0007] In view of the above problems, this application aims to provide a riveting tool for repairing insufficient riveting torque caused by the loosening of clinch nuts or clinch screws that have been clinched in clinched parts, which can effectively solve the above problems existing in the prior art.

[0008] To this end, the present application proposes a riveting tool, which is characterized in that the riveting tool includes: a base; a nozzle provided at the front end of the base; a riveting rod, with the nozzle sleeved around the riveting rod; a handle, movably connected to the base and operatively connected to the riveting rod, such that the handle can move between a first position where it opens to extend the riveting rod forward from the base and a second position where it closes to retract the riveting rod towards the base; the nozzle is provided with an extrusion member, and the extrusion member and the riveting rod are configured such that in the first position of the handle, the riveting rod can be threadedly connected to a riveting nut or a riveting screw that has been riveted into a riveting part, and the extrusion member on the nozzle abuts against the corresponding riveting nut or the riveting screw part, and as the handle moves from the first position to the second position, the riveting rod retracts to pull the riveting nut or the riveting screw, and at the same time the extrusion member extrudes and deforms the corresponding riveting nut or the riveting screw part towards the riveting part.

[0009] With such a riveting tool according to the present application, it can be used for EPE nuts and EPE screws that have been riveted into EPE parts, especially for repairing the insufficient EPE torque caused by the loosening of EPE nuts and EPE screws that have been riveted into EPE parts. Moreover, the repair time is significantly reduced by more than 80%. The repair safety is also increased because there is no need for processes such as grinding and welding that are necessary for traditional repairs. In addition, the cost is greatly saved economically, and the monthly cost savings for a single component can reach thousands of yuan.

[0010] Preferably, the extrusion member is in the form of protrusions distributed around a front central hole on the free front end face of the nozzle.

[0011] Preferably, the nozzle has at least three protrusions evenly distributed angularly on the front end face.

[0012] Preferably, the riveting tool further includes a limiting device, the limiting device includes a limiting sleeve, the limiting sleeve is screwed into the front end of the base through its outer threaded section at the rear, and the nozzle is screwed into the front end of the limiting sleeve through an outer threaded section at the rear opposite to the front end face.

[0013] Preferably, each protrusion is arc-shaped.

[0014] Preferably, each protrusion is 2 - 5 mm high and 1 - 3 mm wide.

[0015] Preferably, the limiting device further includes one or more limiting gaskets, and the limiting gaskets are detachably arranged between the front end of the base and the limiting sleeve.

[0016] Preferably, when used for a rivet nut that has been press-riveted into a press-riveting part, the nozzle is an external hexagonal nut nozzle, and the matching riveting rod passes through the inner channel of the external hexagonal nut nozzle and protrudes forward from the front central hole on the front end face. The size of the protruding threaded rod part of the riveting rod is set such that the threaded rod part matches the internal threaded hole of the corresponding rivet nut, so that the threaded rod part can be rotated and screwed into the internal threaded hole in place at the first position of the handle. At this time, the extrusion part abuts against the support surface of the head of the rivet nut, and when the handle moves from the first position to the second position, the riveting rod pulls the rivet nut, and at the same time, the extrusion part of the matching external hexagonal nut nozzle deforms the support surface of the head of the rivet nut, so that a tight fit is achieved between the rivet nut and the associated press-riveting part.

[0017] Preferably, when used for a press-riveted screw that has been press-riveted into a press-riveting part, the nozzle is an external hexagonal screw nozzle, and the matching riveting rod is configured to be located inside the external hexagonal screw nozzle. A threaded hole channel is provided in the center of the free part of the riveting rod that does not protrude outside the external hexagonal screw nozzle. The size of the threaded hole channel in the center is set such that the threaded hole channel in the center matches the threaded rod of the corresponding press-riveted screw, so that the threaded rod can be rotated and screwed into the threaded hole channel in the center in place at the first position of the handle. At this time, the extrusion part abuts against the bottom surface of the head of the press-riveted screw, and when the handle moves from the first position to the second position, the riveting rod pulls the press-riveted screw, and at the same time, the extrusion part of the matching external hexagonal screw nozzle deforms the bottom surface of the head of the press-riveted screw, so that a tight fit is achieved between the press-riveted screw and the associated press-riveting part.

[0018] Preferably, the riveting tool is in the form of a double-handled rivet nut gun.

[0019] The above description is only an overview of the technical solution of the present application. In order to be able to more clearly understand the technical means of the present application, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. Description of the Drawings

[0020] By reading the following detailed description of the embodiments given in an unrestricted manner in conjunction with the drawings, other purposes, features, details and advantages of the present application will be more clearly reflected. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. In addition, the various features of the drawings discussed below do not necessarily need to be drawn to scale. The sizes of the various features and elements in the drawings can be enlarged or reduced to more clearly show the embodiments of the present application. And in all the drawings, the same reference numerals refer to similar or identical elements throughout the drawings and their descriptions. In the drawings:

[0021] Figure 1Overall schematic view of a riveting tool for a riveted EPE nut in the form of a double - handled riveting gun according to a first embodiment of the present application, with the double handles in an open first position.

[0022] Figure 1a is Figure 1 Partial enlarged schematic perspective view of the gun head shown in the square box.

[0023] Figure 2 is Figure 1 Partial cross - sectional view of the riveting gun seat part of the riveting tool in the form of a double - handled riveting gun shown in along its G - G line;

[0024] Figures 3 - 5 is Figures 1 - 2 Schematic views of different angles of the nozzle of the riveting tool shown in, where Figure 3 is a perspective view seen from the free front end face of the nozzle, Figure 4 is a side perspective view, and Figure 5 is a top view of the nozzle seen from the front end face side;

[0025] Figure 6a 、 6b and 6c represent different states between the EPE nut and the associated EPE part, which respectively schematically represent the normal state, the loose state, and the repaired state after repair using the riveting tool shown in Figures 1 - 2 shown.

[0026] Figure 7 is similar to Figure 2 、but is a partial cross - sectional view of the riveting gun seat part of a riveting tool for a riveted EPE screw according to a second embodiment of the present application.

[0027] Figure 8 and Figure 9 are different views of the EPE screw after repair using the riveting tool shown in Figure 7 shown, where Figure 8 represents its side perspective view seen from the nail rod side, and Figure 9 represents the top view seen from the screw rod side. Detailed implementation mode

[0028] The following describes various illustrative embodiments of the present application. In this specification, for explanatory purposes only, various systems, structures, and devices are schematically depicted in the drawings, but not all features of the actual systems, structures, and devices are described. For example, well-known functions or structures are not described in detail to avoid obscuring the present application with unnecessary details. Of course, it should be understood that in any actual application, many specific implementation decisions need to be made to achieve the specific goals of the developer or user, and it is necessary to comply with system-related and industry-related restrictions, and these specific goals may vary depending on the actual application. In addition, it should be understood that such specific implementation decisions, although complex and time-consuming, are routine tasks for those of ordinary skill in the art who benefit from the present application.

[0029] The terms and phrases used herein should be understood and interpreted to have the same meaning as that understood by those of ordinary skill in the relevant art for these terms and phrases. The consistent use of terms or phrases herein is not intended to imply a special definition of the terms or phrases, that is, a definition different from the ordinary and customary meaning understood by those of ordinary skill in the art. For terms or phrases intended to have a special meaning, that is, a meaning different from that understood by those of ordinary skill in the art, such special definition will be clearly listed in the specification in a definitional manner, directly and unambiguously giving the special definition of the term or phrase.

[0030] Unless the context requires otherwise, throughout the following specification and claims, the word "comprise" and its variations, such as "comprises" will be interpreted in an open, inclusive sense, that is, as "including but not limited to".

[0031] Throughout the description of this specification, descriptions with reference to terms such as "an embodiment", "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. Thus, the phrases "in one embodiment" or "in an embodiment" that appear in different places throughout this specification are not necessarily all referring to the same embodiment. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0032] As used in this specification and the appended claims, unless otherwise expressly specified and defined, the indefinite article "a" and the definite article "the" in the singular form include one or more referents. It should also be noted that, unless otherwise expressly specified and defined, the term "or" generally means "and / or" in meaning. For the purposes of this description, a phrase in the form of "A or B" means "(A), (B), or (A and B)". For the purposes of illustration, a phrase in the form of "at least one of A, B, or C" means "(A), (B), (C), (A and B), (A and C), (B and C), or (A, B, and C)". Additionally, the character " / " in this document generally indicates that the related objects before and after are in an "or" relationship.

[0033] In the description of the embodiments of the present application, terms such as "first", "second", etc. are only used to distinguish different objects, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity, specific order, or primary-secondary relationship of the indicated technical features.

[0034] In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more groups (including two groups), and "multiple pieces" refers to two or more pieces (including two pieces).

[0035] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the embodiments of the present application.

[0036] In the present application, unless otherwise expressly specified and defined, terms such as "installed", "connected", "coupled", "joined", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0037] Next, the present invention of the present application will be further described in detail in conjunction with the drawings and specific embodiments. The following embodiments are used to illustrate the present invention of the present application, but are not used to limit the scope of the present invention.

[0038] As mentioned above, to repair the insufficient EPE torque caused by loose EPE nuts or EPE screws that have been riveted in the EPE parts, the present application particularly provides a riveting tool. The riveting tool according to the present application can of course also be used to further tighten the EPE nuts or screws of the EPE parts.

[0039] Generally speaking, the riveting tool according to the present application includes: a base; a nozzle provided at the front end of the base; a riveting rod, and the nozzle is sleeved around the riveting rod; a handle, movably connected to the base and operatively connected to the riveting rod, so that the handle can move between a first position where it opens to extend the riveting rod out from the front of the base and a second position where it closes to retract the riveting rod towards the base; the nozzle is provided with an extrusion member, and the extrusion member and the riveting rod are configured such that in the first position of the handle, the riveting rod can be threadedly connected to the EPE nut or EPE screw that has been riveted in the riveted part, and the extrusion member on the nozzle abuts against the corresponding EPE nut or EPE screw part, and as the handle moves from the first position to the second position, the riveting rod retracts to pull the EPE nut or EPE screw, and at the same time the extrusion member extrudes and deforms the corresponding EPE nut or EPE screw part towards the riveted part. The following will be described in more detail based on different embodiments in conjunction with the drawings.

[0040] First, reference can be made to Figure 6a 、 6b and 6c. As indicated by the circles on the right side in each figure, Figure 6a schematically shows the normal state between the EPE nut and the associated EPE part. In this state, there is a tight fit between the EPE part B and the EPE nut C without gaps; while Figure 6b schematically shows that there is a gap between the EPE nut C and the associated EPE part B, which indicates that the EPE nut is loose, thus causing the aforementioned problem of insufficient EPE torque; Figure 6c represents the repaired state between the EPE part B and the EPE nut C after being repaired by the riveting tool according to the application as shown in Figures 1 - 2 . This will be introduced in detail below.

[0041] Advantageously, the riveting tool according to the present application can be generally in the form of a double - handle riveting gun, more specifically, for example, in the form of the double - handle rivet nut gun A as shown in Figure 1 .

[0042] Figures 1 - 2 Fig. shows a riveting tool for repairing EPE nuts according to the first embodiment of the present application, which is generally in the form of a double - handle rivet nut gun A. The rivet nut gun A includes: a riveting gun seat 1 constituting the aforementioned base; a nut nozzle 5 provided at the front end of the riveting gun seat; a detachable riveting rod 4 matching the nut nozzle 5. The nozzle 5 is sleeved around the riveting rod 4. The nut nozzle 5 here is an external hexagon nut nozzle. From the representationFigure 1 Magnification of the boxed part Figure 1a The nut nozzle 5 and the riveting rod 4 can be seen more clearly.

[0043] As Figure 1 , 1a and shown in 2, the riveting nut gun A further includes a limit sleeve 6. Further referring to Figure 2 , the limit sleeve 6 has a rear external thread section 62 at the rear end. The limit sleeve is screwed into the front end of the riveting gun seat 1 through the cooperation of the rear external thread section with the internal thread at the front end of the riveting gun seat. The nut nozzle 5 is screwed into the front end of the limit sleeve 6 through a rear external thread section 52 at the rear end. The riveting rod 4 successively passes through the inner channels of the limit sleeve 6 and the nut nozzle 5 and protrudes forward from the front central hole 54 on the front end face of the nozzle.

[0044] As Figure 1 shown, the riveting nut gun A further includes two handles 2 which are movably hinged to the riveting gun seat 1 on both sides of the riveting gun seat through pin shafts respectively, so it is called a double-handle riveting nut gun. Of course, this is not restrictive.

[0045] It should be pointed out here that generally, for a riveting gun, here the gun head of the riveting nut gun, i.e., the riveting gun seat, is the front part, and the direction towards the handle is backward. Thus, the direction from the handle 2 towards the gun head, i.e., the riveting gun seat 1, is called from the rear to the front, and vice versa is from the front to the rear.

[0046] The riveting gun is constructed such that when its handles, such as the two handles are opened, i.e., it is in the first position, the riveting rod extends out from the front of the riveting gun seat; and when the handles, such as the two handles are closed, i.e., moving from its first position to the second position, the riveting rod retracts towards the riveting gun seat to allow pulling the corresponding EPE nut or EPE screw in the direction away from the associated EPE part.

[0047] More specifically, here Figure 1 shown double-handle riveting nut gun A includes a pull rod 9 located inside the riveting gun seat 1. The riveting rod 4 is fixed to the front end of the pull rod 9 at its rear end. And the pull rod 9 is connected to a pull rod telescoping mechanism at its rear end. The pull rod telescoping mechanism generally includes a pull rod seat 16 as shown in Figure 2 , a fixed nut 18 located in the cavity of the pull rod seat 16. The lower end of the pull rod 9 passes through the pull rod seat 16 and is fixedly connected to the fixed nut 18. The pull rod seat 1 is telescopically and movably connected to the left and right two handles 2 through a connecting rod not shown.

[0048] The riveting rod 4 is detachably fixed to the pull rod 9.

[0049] For this purpose, advantageously, as Figure 2As shown, a fixed sliding sleeve 8 is sleeved on a pull rod 9, and a spring 10 at the tail of the fixed sliding sleeve 8 is sleeved on the pull rod 9. The rear end of the riveting rod 4 is provided with an external thread, and the front end of the pull rod 9 is provided with a matching internal thread. The riveting rod 4 can be fixed to the front end of the pull rod 9 through the matching thread, and the tensile strength is ensured through this threaded connection. Advantageously, the outer part of the rear end of the riveting rod 4 is polygonal, such as a regular hexagon; the outer part of the front end of the pull rod 9 is the same polygon as the rear end of the riveting rod 4, such as a regular hexagon. The fixed sliding sleeve 8 is sleeved on the pull rod 9, and its inner hole is a polygon, such as a regular hexagon, that matches the polygon at the front end of the pull rod 9. The polygons of the riveting rod 4 and the pull rod 9 are sleeved together through the polygon of the fixed sliding sleeve 8, ensuring that the riveting rod 4 and the pull rod 9 will not become loose during operation. The spring 10 is sleeved on the pull rod 9, and one end of it elastically abuts against the tail of the fixed sliding sleeve 8. When installing or disassembling the riveting rod 4, the fixed sliding sleeve 8 needs to be pulled down. After installing or disassembling the riveting rod 4 is completed, the fixed sliding sleeve 8 can return to its original position under the elastic force of the spring 10, which is convenient to use. Advantageously, as Figure 1 shown, the limit sleeve 6 can be provided with a window 63 to facilitate the operation of the fixed sliding sleeve 8.

[0050] In addition, although not shown in the figure, preferably, the rivet nut gun A can include a one-way clutch and a clutch outer sleeve connected to the aforementioned pull rod telescopic mechanism. The one-way clutch is fixed in the clutch seat. The one-way clutch is installed at the tail of the fixed nut 18, and the clutch outer sleeve is connected to the pull rod seat 16 through a thread.

[0051] The one-way clutch seat is connected to a screw rod (not visible in the figure) through a pin shaft. A screw rod outer sleeve 19 is sleeved on the screw rod (see Figure 1 ). The front end of the screw rod outer sleeve 19 is fixed to the clutch outer sleeve through a thread; a push rod 21 is sleeved between the screw rod and the screw rod outer sleeve 19 (see Figure 1 ). One end, i.e., the front end, of the push rod 21 is inlaid with steel balls that match the spiral grooves of the screw rod inside the outer sleeve 19. The other end, i.e., the rear end, of the push rod is connected to a knob 28. The knob 28 is connected to the left and right withdrawal link rods 27 through a pin shaft. The withdrawal link rods 27 are respectively hingedly and movably connected to the corresponding handles 2 through pin shafts 26. Handle sleeves 3 are provided on the two handles 2, and the handle sleeves 3 can prevent the palm from slipping and being overly squeezed, making it more convenient and comfortable to use.

[0052] A pull rod return spring (not visible in the figure) is usually installed in the inner space between the clutch seat and the clutch outer sleeve, and the installation space of the pull rod return spring is the telescopic movement space of the pull rod 9.

[0053] In addition, further referring to Figures 2 - 4, the nut nozzle 5 has a front external hexagonal nut portion 53 and the aforementioned rear external threaded section 52. The central inner channel extends forward from the rear external threaded section 52 through to the front external hexagonal nut portion 53, and its inner diameter at the front external hexagonal nut portion 53 is smaller than its inner diameter at the rear external threaded section 52. Here, the inner diameter of the front central hole 54 formed by the central inner channel at the front external hexagonal nut portion 53 is slightly larger than the outer diameter of the riveting rod 4 passing through it.

[0054] Here, the front external nut portion 53 arranged in an external hexagonal shape is designed to facilitate loosening and removing the nozzle with a corresponding wrench of the appropriate specification when it is necessary to replace the matching nozzle and riveting rod; then, through the window 63 of the limit sleeve 6 (as shown in Figure 1 and 1a ), the fixed sliding sleeve 8 is pushed backward to disengage the fixed sliding sleeve 8 from the riveting rod 4, and then the riveting rod 4 is loosened and removed; then, a new riveting rod corresponding to the EPE nut size to be used is inserted into the riveting gun seat 1 and tightened to the pull rod 9. Loosening the fixed sliding sleeve 8 fixes the new riveting rod to the pull rod 9, and then the new nozzle matching the new riveting rod is tightened to the limit sleeve 6 with a matching wrench.

[0055] However, it should be noted that different from the conventional riveting gun with a flat front-end face nozzle, here it is a conventional rivet nut gun, the riveting tool according to the present application is also provided with the aforementioned pressing member on its nozzle, here it is the nut nozzle 5, especially such a pressing member is provided on the flat front-end face of the nozzle. Advantageously, the pressing member is in the form of a protrusion. More advantageously, the nut nozzle 5 has at least three protrusions 51 evenly distributed angularly around the front central hole 54 on its free front-end face, here it is the flat front-end face of the front external hexagonal nut portion 53, and preferably three protrusions 51, as shown in Figures 3 - 5 . These protrusions constitute the pressing member in the sense of the present application, and are used to plastically deform the corresponding EPE nut by at least three-point downward extrusion in the direction of the EPE part while the handle 2 is closed to pull up the EPE nut to be repaired in the EPE part. Thus, the protrusions can be called pressing protrusions. It is reminded again that pulling up and squeezing down are relative to the EPE part. Pulling up means pulling in the opposite direction of the EPE part, and squeezing down means squeezing towards the EPE part.

[0056] Preferably, the three protrusions 51 can be evenly distributed angularly with a separation of 120 degrees from each other. Each protrusion is preferably in an arc shape. Each protrusion 51 can be 2 - 5 mm high and 1 - 3 mm wide, preferably 3 mm high and 2 mm wide. Here, the height of the protrusion is measured from the flat front-end face to the top of the protrusion, and the width of the protrusion is measured along the circumferential direction of the protrusion around the front central hole.

[0057] These protrusions as extrusion parts can be realized by welding, such as argon arc welding, and fine grinding is required after welding so that these protrusions are evenly distributed upward around the front center hole angle and their shapes and sizes are consistent. Advantageously, these protrusions are arc-shaped, that is, they have no edges and corners, so that only a slightly smaller force is needed to extrude the EPE nut head support surface during extrusion, so that three corresponding grooves are formed on the support surface, thereby causing the EPE nut to swell twice. Figure 6c In the figure, one such groove and the corresponding protuberance indicated by the circle can be seen. Based on this, this guide nozzle can be called a compression sleeve for the rivet-type tool for repair according to the present application, especially a three-point compression sleeve.

[0058] However, this is not restrictive. Other forms can be considered to realize the extrusion piece on the flat front end surface of the guide nozzle, as long as it can achieve the above-mentioned similar functions.

[0059] This guide nozzle is made of a metal with a relatively high hardness, such as steel, for example, it can be made of 45# steel with a high hardness.

[0060] In addition, the protruding threaded rod of the rivet rod 4 matched with the guide nozzle with the protrusion is solid. The size of the threaded rod is set to match the internal threaded hole of the EPE nut to be repaired, such as the EPE nut that has been riveted in the EPE part, so that when the two handles 2 are opened, the threaded rod can be rotated and screwed into the internal threaded hole. At this time, the extrusion part, here, the protrusion 51, will abut against the head support surface, so that the EPE nut C can be pulled up when the two handles 2 are closed, and at the same time, the protrusion 51 of the matching external hexagonal nut guide nozzle squeezes and deforms the EPE nut head support surface downward, such as at least three-point extrusion plastic deformation, so that the EPE nut C and the corresponding riveting part B are tightly matched.

[0061] When using this rivet tool to repair a loose EPE nut in an EPE part, first open the handle 2 to place it in the first position, then screw the aforementioned threaded rod portion of the rivet rod 4 into the appropriate position of the internal threaded hole of the EPE nut, so that the three preferably arc-shaped protrusions 51 of the nut guide nozzle 5 abut against the EPE nut head support surface; then, as the handle 2 is closed, i.e., as the handle moves from the first position to the second position, the aforementioned pull rod telescopic mechanism associated with the handle 2 causes the pull rod 9, and thus the rivet rod 4, to be pulled away from the EPE part, i.e., outward and upward, while the three preferably arc-shaped protrusions of the nut guide nozzle plastically deform the head support surface of the EPE nut downward by preferably three-point extrusion, thereby reducing the gap between the EPE nut and the associated EPE part, so that they fit tightly together, thereby achieving the desired expected torque value. As mentioned earlier, from Figure 6c In the figure, it can be seen that the corresponding protrusion which contacts the corresponding EPE part is formed on the opposite surface of the repaired EPE nut and the head support surface of the contact guide nozzle.

[0062] Particularly advantageously, closing the handle 2 to pull the riveting rod 4 outwards and upwards through the pull rod telescopic mechanism is achieved as follows: when holding the two handles 2 with both hands and closing the two handles 2, the one-way clutch sleeved on the pull rod 9 is in an open state, the push rod 21 will rotate, the pull rod 9 will not rotate, and the pull rod 9 will move backwards, that is, outwards and upwards relative to the EPE nut, under the action of the pull rod telescopic mechanism.

[0063] Advantageously, the riveting tool may further include one or more limiting gaskets (not shown), and the limiting gaskets are detachably arranged between the front end of the riveting gun seat and the limiting sleeve 6, more specifically, the outer protruding part 61 of the limiting sleeve (as Figure 1a and 2 shown).

[0064] In particular, such a limiting gasket is mainly used in cooperation with the riveting rod of model m6, because the riveting rod of this model is thinner and is likely to be broken when repaired with the tool and break in the EPE nut hole. Using such a limiting gasket can avoid this risk. However, for models m8 and m10, such a gasket is not required and can be removed at this time.

[0065] After repairing the EPE nut by pulling and squeezing down on the protrusion 51 of the riveting rod 4 and the nozzle (also known as the pressing sleeve), as Figure 6c shown, the operator then holds the two handles 2 with both hands and opens the handles 2. At this time, the steel balls on the push rod 21 move in the spiral grooves of the spiral rod. Since a one-way clutch is sleeved on the spiral rod and the one-way clutch is in a closed state, and the one-way clutch is sleeved on the tail end of the pull rod 9, the spiral rod will drive the pull rod 9 to rotate together. Because the polygons on the riveting rod 4 and the pull rod 9 are sleeved together through the fixed sliding sleeve 8, the pull rod 9 drives the riveting rod 4 to rotate together, so that the riveting rod 4 is screwed out of the EPE nut.

[0066] In addition, as Figure 1 shown, a manual knob 28 is also provided at the tail of the push rod 21, and the knob 28 can also control the rotation and forward and backward movement of the spiral rod or the push rod 21.

[0067] More simply, the rivet nut gun may not be provided with the withdrawal mechanism as described above. In this way, when it is necessary to withdraw the gun after the repair is completed, the operator can hold the handle and rotate the gun by hand to withdraw it.

[0068] The foregoing has described the repair of the loose EPE nut in the EPE part according to the riveting tool as Figures 1 - 2 shown. In addition, such a riveting tool can also be provided for repairing the loose EPE screw, that is, the press riveting screw, in the EPE part.

[0069] The riveting tool for the EPE screw in the EPE part is similar to the riveting tool for the EPE nut in the EPE part in terms of overall structure. Only the differences between the two are described below.

[0070] Figure 7 Schematically shows the gun head, i.e., the riveting gun seat part, at the front of the riveting tool A' for the EPE screw. Its difference from Figure 2 the gun head part of the riveting tool for the EPE nut shown mainly lies in the riveting rod.

[0071] As Figure 7 shown, the length of the riveting rod 4' is reduced relative to Figure 2 the riveting rod 4, so that it does not protrude outside the nozzle like the riveting rod 4, but is located within the corresponding nozzle 5'. Similar to the previous nozzle 5, the nozzle 5' also includes a front external hexagonal nut part 53' and a rear external thread section 52', and similar pressing parts are also provided on its flat free front end surface, such as at least three, preferably three protrusions 51'. At this time, the nozzle is called a screw nozzle, especially an external hexagonal screw nozzle.

[0072] Still referring to Figure 7 , the free riveting rod part of the riveting rod 4' that does not protrude outside the screw nozzle has a threaded hole 41 in the center. The size of the central threaded hole 41 is set so that the threaded hole matches the threaded rod 7a of the EPE screw 7 to be repaired in the EPE part (see Figures 8 - 9 ), so that when the two handles 2 of the riveting tool are opened, the threaded rod 7a can be rotated and screwed into the central threaded hole 41 in place. At this time, the three protrusions 51' constituting the pressing part abut against the bottom surface 7c of the EPE screw cap 7b, that is, the surface on the side of the threaded rod 7a, so that when the two handles 2 are closed, they cooperate with the threaded rod 7a to pull the EPE screw 7 away from the EPE part, that is, upward, and at the same time, the three protrusions 51' of the matching screw nozzle 5' correspondingly plastically deform the bottom surface 7c of the EPE screw cap 7b in a three-point extrusion manner, so that the EPE screw 7 and the associated riveting part are tightly fitted through upward pulling and downward extrusion. See Figures 8 - 9 , from which three corresponding grooves 7d formed by the extrusion deformation of the three protrusions 51' on the bottom surface 7c of the repaired EPE screw cap 7b can be seen. For clarity, the EPE part associated with the EPE screw 7 is not shown in the figure.

[0073] Therefore, when using Figure 7 the riveting tool A' shown, for example, to repair the loose EPE screw in the EPE part, the central threaded hole 41 of the riveting rod 4' is matched with the rod 7a, and the protrusions 51' act on the bottom surface 7c of the EPE screw cap. And when using Figures 1 - 2When the shown riveting gun A repairs the loose EPE nut in the EPE part, the threaded rod part of the riveting rod 4 protruding from the nozzle 5 is matched with the internal threaded hole of the EPE nut, and the protrusion 51 acts on the external supporting surface of the head of the EPE nut. Based on this special design of the nozzles 5 and 5' of the present application with extrusion parts, here are protrusions, as described above, such nozzles can also be called compression sleeves, especially three-point compression sleeves.

[0074] When using this riveting tool in the form of a double-handled riveting gun, only need to select a matching nozzle with a protrusion forming an extrusion part and a matching riveting rod according to the type and model of the corresponding EPE nut or screw in the EPE part to be used, and install them on the riveting tool as described above. Then, the corresponding EPE nut or screw can be simply operated as described above, so that it can quickly repair, for example, the insufficient torque caused by the loosening of the EPE nut or screw in the EPE part, make the EPE nut or screw fit tightly with the corresponding EPE part, increase the torque to meet the quality standard, avoid hot work, and greatly shorten the repair time. Moreover, through continuous testing, the average torque reaches about 13 Nm, solving the risk that the long repair time affects the subsequent production progress of the workshop.

[0075] In short, the present application may include any feature or combination of features or generalizations implicitly or explicitly disclosed herein, not limited to any defined scope listed above. Any element, feature, and / or structural arrangement described herein can be combined in any suitable manner.

[0076] The specific embodiments disclosed above are only exemplary. It is obvious to those skilled in the art who benefit from the teachings herein that the present application can be repaired and implemented in different but equivalent ways. For example, the above method steps can be executed in a different order. In addition, except as described in the following claims, the details of the structures or designs shown herein are not limited. Therefore, it is obvious that the specific embodiments disclosed above can be changed and repaired, and all these variations are considered to fall within the scope and spirit of the present application. Therefore, the protection sought herein is listed in the appended claims.

Claims

1. A riveting tool, characterized in that, The riveting tool (A, A') includes: a base (1); a nozzle (5, 5') provided at the front end of the base; a riveting rod (4, 4'), with the nozzle sleeved around the riveting rod; a handle (2), movably connected to the base and operatively connected to the riveting rod, such that the handle (2) can move between a first position where it opens to extend the riveting rod forward from the base and a second position where it closes to retract the riveting rod towards the base; the nozzle (5, 5') is provided with an extrusion member, and the extrusion member and the riveting rod are configured such that in the first position of the handle, the riveting rod (4, 4') can be threadedly connected to a riveting nut (C) or a riveting screw (7) that has been riveted to a riveting part (B), and the extrusion member on the nozzle abuts against the corresponding riveting nut or the riveting screw part, and as the handle moves from the first position to the second position, the riveting rod (4, 4') retracts to pull the riveting nut (C) or the riveting screw (7), while the extrusion member extrudes and deforms the corresponding riveting nut or the riveting screw part towards the riveting part direction.

2. The riveting tool according to claim 1, characterized in that, The extrusion member is in the form of protrusions distributed around a front central hole (54, 54') on the free front end face of the nozzle (5, 5').

3. The riveting tool according to claim 2, characterized in that, The nozzle (5, 5') has at least three protrusions (51, 51') evenly distributed angularly on the front end face.

4. The riveting tool according to claim 3, characterized in that, The riveting tool further includes a limiting device, and the limiting device includes a limiting sleeve (6), and the limiting sleeve is screwed into the inner part of the front end of the base (1) through its rear external thread section (62), and the nozzle (5, 5') is screwed into the inner part of the front end of the limiting sleeve (6) through a rear external thread section (52) opposite to the front end face.

5. The riveting tool according to claim 4, characterized in that, Each protrusion (51, 51') is arc-shaped.

6. The riveting tool according to claim 5, wherein, Each protrusion (51, 51') has a height of 2 - 5 mm and a width of 1 - 3 mm.

7. The riveting tool according to claim 6, characterized in that, The limiting device further includes one or more limiting washers, and the limiting washers are detachably arranged between the front end of the base (1) and the limiting sleeve (6).

8. The riveting tool according to any one of claims 1 to 7, characterized in that When used for a riveting nut (C) that has been riveted to a riveting part (B), the nozzle is an external hexagonal nut nozzle, and the matching riveting rod passes through the inner channel of the external hexagonal nut nozzle and protrudes forward from the front central hole on the front end face. The size of the protruding threaded rod part of the riveting rod is set such that the threaded rod part matches the internal threaded hole of the corresponding riveting nut, so that in the first position of the handle, the threaded rod part can be rotated and screwed into the internal threaded hole in place. At this time, the extrusion member abuts against the support surface of the riveting nut head, and when the handle moves from the first position to the second position, the riveting rod pulls the riveting nut, and at the same time, the extrusion member of the matching external hexagonal nut nozzle extrudes and deforms the support surface of the riveting nut head, so that a tight fit is achieved between the riveting nut and the associated riveting part.

9. The riveting tool according to any one of claims 1 to 7, characterized in that, When used for the rivet nut screw (7) that has been press-riveted into the press-riveting part (B), the guide nozzle is an external hexagon screw guide nozzle, and the matching riveting rod is configured to be located inside the external hexagon screw guide nozzle. The free part of the riveting rod that does not extend outside the external hexagon screw guide nozzle has a threaded hole in the center. The size of the threaded hole in the center is set so that the threaded hole in the center matches the threaded shank of the corresponding rivet nut screw, so that the threaded shank can be rotated and screwed into the threaded hole in the center in place at the first position of the handle. At this time, the extruding part abuts against the bottom surface of the rivet nut screw head. When the handle moves from the first position to the second position, the riveting rod pulls the rivet nut screw, and at the same time, the extruding part of the matching external hexagon screw guide nozzle deforms the bottom surface of the rivet nut screw head, so that a tight fit is achieved between the rivet nut screw and the associated press-riveting part.

10. The riveting tool according to any one of claims 1 to 7, characterized in that, The riveting tool is in the form of a double-handled rivet nut gun.

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