A pull rivet gun with torque feedback anti-over rivet control mechanism

Abstract

The application relates to the technical field of pull-rivet guns, and discloses a pull-rivet gun with a torque feedback anti-over-riveting control mechanism, which comprises a machine shell, a handle is arranged on the machine shell, a pressing rod is hingedly connected at the joint of the machine shell and the handle, a pull-rivet mechanism is arranged in the machine shell, a transmission mechanism is arranged in the machine shell and connected between the pressing rod and the pull-rivet mechanism, the pull-rivet mechanism is driven to operate through the transmission mechanism when the pressing rod is pressed, and the transmission mechanism can be temporarily disconnected when the pulling force during the pull-riveting exceeds a set value. Through the arrangement of the transmission mechanism, the inner sliding sleeve and the outer sliding sleeve are indirectly converted into the contraction movement of the wedge through the cooperation of the relative movement, the two wedges can automatically shrink into the polished rod when the pulling force during the operation is greater than the set value, effective transmission is stopped, the current rivet state is maintained, and the anti-over-riveting protection is realized.

Description

Technical Field

[0001] This invention relates to the field of rivet gun technology, and specifically to a rivet gun with a torque feedback anti-over-rivet control mechanism. Background Technology

[0002] A rivet gun is a specialized tool used for fastening and riveting with blind rivets. Based on power type, it can be divided into manual, electric, and pneumatic types. The manual type is widely used due to its ease of operation and reasonable cost. Its core structure typically includes a housing providing mounting support, a handle for applying force, a push-pull mechanism for transmitting power, a jaw for clamping the rivet core and a jaw mounting sleeve, a spring assembly for auxiliary reset, and a pushing mechanism for clamping and releasing the rivet core. Some types also include connecting rods, fixing pins, and other transmission or positioning components. This tool is mainly used to solve problems such as the easy melting of nuts during welding and the easy stripping of internal threads when tapping thin metal sheets and tubes. It is widely used in automobile manufacturing, construction, electromechanical equipment, instrumentation, furniture decoration, elevators, and billboard production.

[0003] However, the existing technology has the following problems:

[0004] Most existing operations rely on the fracture of the rivet core itself as a termination signal. However, when riveting thin plates, soft substrates, or using small-sized, low-strength rivets, the upper limit of the pressure resistance of the workpiece and the outer wall of the rivet may be lower than the tensile force required for the core to fracture. The continuously applied excessive tensile force will continuously squeeze and stretch the rivet sleeve and the plate, which can easily cause problems such as rivet expansion and cracking, substrate dent and deformation, and loosening of the riveting structure. Summary of the Invention

[0005] The purpose of this invention is to provide a rivet gun with a torque feedback anti-over-rivet control mechanism to solve the above-mentioned problems. It aims to overcome the defect of the prior art that when the upper limit of the pressure between the workpiece and the outer wall of the rivet is lower than the tensile force required for the iron core to break, continuous riveting will easily cause over-rivet problems, as detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The present invention provides a rivet gun with a torque feedback anti-over-rivet control mechanism, comprising a housing, a handle on the housing, and a pressure rod hinged at the junction of the housing and the handle; a rivet mechanism is provided inside the housing; a transmission mechanism is provided inside the housing, the transmission mechanism being connected between the pressure rod and the rivet mechanism, wherein when the pressure rod is pressed, the rivet mechanism is driven to run through the transmission mechanism, and the transmission mechanism can temporarily disconnect the transmission when the pulling force during rivetry exceeds a set value.

[0008] Preferably, the riveting mechanism includes a base, which is slidably installed inside the housing. Two inclined rods are connected to the base, and the two inclined rods are inclined in a constricted shape on the side close to each other. Clamping blocks are slidably connected to the side close to each other of the two inclined rods respectively.

[0009] Preferably, the clamping block is provided with anti-slip texture, and a first spring is provided between the clamping block and the inclined rod.

[0010] Preferably, the transmission mechanism includes a guide rod connected to a base. Two wedges are slidably mounted on the guide rod. An inner sliding sleeve is slidably fitted onto the outer wall of the guide rod, and an outer sliding sleeve is slidably fitted onto the outer wall of the inner sliding sleeve. A pressure ring is connected to the inner wall of the outer sliding sleeve. A second spring is provided between the pressure ring and the outer sliding sleeve. The wedges are in contact with the inner sliding sleeve, and the outer sliding sleeve is movably connected to a pressure rod. When the pressure rod is pressed, it uses a lever principle to drive the outer sliding sleeve to move away from the base.

[0011] Preferably, the inner wall of the outer sliding sleeve is connected to a sliding rod, and the smooth rod and the inner sliding sleeve are provided with a through groove for the sliding rod to slide. A reciprocating rod is connected to the sliding rod, and a grooved ring is rotatably installed on the inner wall of the smooth rod. When the reciprocating rod moves, it can drive the grooved ring to rotate. When the grooved ring rotates, it can drive two wedges to retract into the smooth rod.

[0012] Preferably, the surface of the reciprocating rod is provided with a spiral groove, the grooved ring is sleeved on the reciprocating rod, the inner wall of the grooved ring is provided with a sliding tongue that is slidably connected to the spiral groove, the wedge is connected with a first sliding shaft, the grooved ring is provided with two arc-shaped grooves, the two first sliding shafts are slidably connected to the two arc-shaped grooves respectively, and when the grooved ring rotates, it drives the two first sliding shafts to move synchronously closer to the center of the grooved ring through the arc-shaped grooves.

[0013] Preferably, the transmission mechanism further includes an adjustment part, which includes a slotted ring rotatably installed inside the housing. A lever is connected to the outer wall of the slotted ring, and two long slots are formed on the inner side of the slotted ring. A second sliding shaft is connected to the outer wall of the pressure ring, and a guide groove for sliding the second sliding shaft is formed on the outer sliding sleeve. The portion of the second sliding shaft protruding from the outer sliding sleeve is located in the long slot of the slotted ring.

[0014] Preferably, the lever extends through to the outside of the housing, and a set of scale lines are provided on the outer wall of the housing in the area next to the lever.

[0015] Preferably, the light rod is provided with a prompting part, the prompting part includes an airbag, the airbag is installed in the light rod, the airbag is connected to an air whistle, and the end of the reciprocating rod near the airbag is connected to a pressure plate, the airbag is located on the movement trajectory of the pressure plate.

[0016] Preferably, the housing has an opening for performing riveting operations, and a clamping mechanism is provided inside the opening. The clamping mechanism includes two elastic blocks, both of which are vertically slidably connected inside the housing. Each elastic block has a notch for matching a rivet core. Each of the two elastic blocks has an inclined surface on the side away from each other, and an abutment rod is connected to each of the two inclined surfaces. The two abutment rods contact the inclined surfaces of the two elastic blocks respectively. A third spring is provided between the two elastic blocks. When the two abutment rods move away from the elastic blocks, they can drive the two elastic blocks closer together through the inclined surfaces.

[0017] The beneficial effects are:

[0018] 1. The rivet gun with torque feedback anti-over-rivet control mechanism, through the setting of the transmission mechanism, allows the inner and outer sliding sleeves to indirectly convert the pulling force into the contraction movement of the wedges through the relative motion cooperation. When the pulling force during operation exceeds the set value, the two wedges can automatically retract into the guide rod, thereby stopping the effective transmission, maintaining the current rivet state, and realizing anti-over-rivet protection.

[0019] 2. This rivet gun with torque feedback anti-over-rivet control mechanism, through the setting of the adjustment part, can accurately adjust the preload of the second spring after the pressure ring moves. When the pressure ring increases the compression of the second spring, a larger force is required to trigger the wedge block to retract, resulting in a higher tension setting value. Therefore, through the setting of the adjustment part, the operator can adjust the tension setting value for triggering the wedge block to retract by turning the lever, which is convenient for use in different working conditions. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the housing structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the transmission mechanism structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the reciprocating rod structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the outer sliding sleeve structure of the present invention;

[0026] Figure 6 This is a schematic diagram of the prompting part structure of the present invention;

[0027] Figure 7 This is a schematic diagram of the adjustment part structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the groove ring structure of the present invention;

[0029] Figure 9 This is a schematic diagram of the pressure ring structure of the present invention;

[0030] Figure 10 This is a schematic diagram of the clamping mechanism of the present invention.

[0031] The annotations in the attached figures are explained as follows:

[0032] 1. Housing; 2. Pressure bar;

[0033] 3. Transmission mechanism; 31. Smooth rod; 32. Wedge block; 321. First sliding shaft; 33. Inner sliding sleeve; 34. Outer sliding sleeve; 35. Pressure ring; 351. Second sliding shaft; 36. Sliding rod; 37. Reciprocating rod; 38. Groove ring;

[0034] 4. Riveting mechanism; 41. Base; 42. Inclined bar; 43. Clamping block;

[0035] 5. Adjustment section; 51. Groove ring; 52. Lever;

[0036] 6. Notification section; 61. Airbag; 62. Siren; 63. Tablet compression;

[0037] 7. Clamping mechanism; 71. Elastic block; 72. Abutment rod. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0039] In the following description, certain specific details are set forth for the purpose of illustrating various disclosed embodiments in order to provide a thorough understanding of the various disclosed embodiments. However, those skilled in the art will recognize that embodiments may be practiced without one or more of these specific details. In other instances, well-known apparatuses, structures, and techniques associated with this application may not have been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

[0040] Throughout this specification, references to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Therefore, the appearance of "in one embodiment" or "in another embodiment" in various places throughout the specification does not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic may be combined in any manner in one or more embodiments.

[0041] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0043] Please see Figure 1 - Figure 5 In one embodiment:

[0044] A rivet gun with a torque feedback anti-over-rivet control mechanism includes a housing 1, a handle on the housing 1, a pressure rod 2 hinged at the junction of the housing 1 and the handle, a rivet mechanism 4 inside the housing 1, and a transmission mechanism 3 inside the housing 1. The transmission mechanism 3 connects the pressure rod 2 and the rivet mechanism 4. When the pressure rod 2 is pressed, it drives the rivet mechanism 4 to operate through the transmission mechanism 3. The housing 1 is gun-shaped and has a handle for gripping. The pressure rod 2 adopts a hinged structure, which can form a lever force structure based on the handle, converting the hand pressure into swinging mechanical force. The transmission mechanism 3 transmits the swinging force of the pressure rod 2 to the rivet mechanism 4 to manually execute the rivet action. A return spring is provided between the pressure rod 2 and the handle. After the pressure rod 2 is released, the return spring drives the pressure rod 2 to return to its original position. A rubber sleeve is provided on the handle, which is fitted over the pressure rod 2 to protect the pressure rod 2 and optimize the feel.

[0045] Specifically, the riveting mechanism 4 includes a base 41, which is slidably installed inside the housing 1. Two inclined rods 42 are connected to the base 41. The two inclined rods 42 are inclined with a tapering shape on their sides. Clamping blocks 43 are slidably connected to the sides of the two inclined rods 42, and the clamping blocks 43 are provided with anti-slip textures. A first spring is provided between the clamping blocks 43 and the inclined rods 42. The base 41 can slide horizontally and linearly inside the housing 1, providing stable support and a moving carrier for the inclined rods 42. The tapering and inclined rods 42 utilize the guiding characteristics of the inclined surface to achieve an adaptive clamping action in conjunction with the clamping blocks 43. The anti-slip textures on the surface of the clamping blocks 43 can significantly increase the gripping force on the rivet core. Friction prevents slippage during riveting, while the first spring applies an elastic thrust to the clamping blocks 43, keeping the two clamping blocks 43 in contact with the rivet core. When the base 41 performs the riveting action, the two inclined rods 42 apply force to the clamping blocks 43 using their inclined surfaces, forcing the two clamping blocks 43 to clamp the rivet core and then pull the rivet core, thereby performing the riveting operation. The two clamping blocks 43 utilize their self-adaptive clamping characteristics to meet the riveting operation of rivet cores with various outer diameters, thus improving the applicability. When the inclined rods 42 return to their original position, their inclined surfaces will not force the clamping blocks 43 to clamp the rivet core, allowing the two clamping blocks 43 to maintain only normal clamping force. At this time, the user can throw the rivet core out by swinging the motor housing 1.

[0046] Furthermore, the transmission mechanism 3 can temporarily disconnect the transmission when the pulling force during riveting exceeds a set value. The transmission mechanism 3 includes a guide rod 31, which is connected to the base 41. Two wedges 32 are embedded and slidably mounted on the guide rod 31. An inner sliding sleeve 33 is slidably sleeved on the outer wall of the guide rod 31, and an outer sliding sleeve 34 is slidably sleeved on the outer wall of the inner sliding sleeve 33. A pressure ring 35 is threadedly connected to the inner wall of the outer sliding sleeve 34. A second spring is provided between the pressure ring 35 and the outer sliding sleeve 34. The wedges 32 are in contact with the inner sliding sleeve 33, and the outer sliding sleeve 34 is movably connected to the pressure rod 2. When the pressure rod 2 is pressed, it uses the lever principle to drive the movement. The outer sliding sleeve 34 moves away from the base 41. Under normal operating conditions, the inner sliding sleeve 33 abuts against the two wedges 32. After pressing the pressure rod 2, the pressure rod 2 drives the outer sliding sleeve 34 to move axially along the smooth rod 31 through the lever principle. When the outer sliding sleeve 34 moves, it drives the pressure ring 35 to squeeze the second spring. The second spring transmits the force to the inner sliding sleeve 33, so that the inner sliding sleeve 33 drives the smooth rod 31 to move synchronously through the two wedges 32. When the smooth rod 31 moves, it can drive the base 41 to move synchronously, thereby triggering the riveting mechanism 4 to run. Similarly, after the pressure rod 2 is reset, the transmission mechanism 3 is also reset.

[0047] In addition, a sliding rod 36 is connected to the inner wall of the outer sliding sleeve 34. A through groove for the sliding rod 36 to slide is provided on both the smooth rod 31 and the inner sliding sleeve 33. A reciprocating rod 37 is connected to the sliding rod 36. A grooved ring 38 is rotatably mounted on the inner wall of the smooth rod 31. When the reciprocating rod 37 moves, it can drive the grooved ring 38 to rotate. When the grooved ring 38 rotates, it can drive two wedges 32 to retract into the smooth rod 31. A spiral groove is provided on the surface of the reciprocating rod 37. The grooved ring 38 is fitted onto the reciprocating rod 37. A sliding tongue is provided on the inner wall of the grooved ring 38 and slidably connected to the spiral groove. A first sliding shaft 321 is connected to the wedges 32. Two arc-shaped grooves are provided on the grooved ring 38. Each of the first sliding shafts 321 is slidably connected to two arc-shaped grooves. When the groove ring 38 rotates, it drives the two first sliding shafts 321 to move synchronously closer to the center of the groove ring 38 through the arc-shaped grooves. Under normal circumstances, applying a certain pulling force to the rivet is sufficient to complete the riveting action, eventually causing the rivet core to fall off. However, when the pulling force applied during riveting is too large due to the rivet's quality or other reasons, the second spring actually forms an elastic transmission component, making the compression of the second spring related to the pulling force during riveting. The greater the riveting force, the greater the compression of the second spring. After the second spring is compressed, it represents the compression between the outer sliding sleeve 34 and the inner sliding sleeve 33. Relative motion occurred, therefore, the slide rod 36 connected to the outer sliding sleeve 34 slid along the through groove, causing the slide rod 36 to drive the reciprocating rod 37 to move closer to the grooved ring 38. The reciprocating rod 37, relying on the cooperation of the spiral groove on its surface and the sliding tongue on the inner wall of the grooved ring 38, drove the grooved ring 38 to rotate. When the grooved ring 38 rotated, it guided the two first sliding shafts 321 to converge synchronously towards the center through the two arc grooves, thereby driving the wedge block 32 to retract into the smooth rod 31 as a whole, thereby releasing the wedge block 32 from the locking engagement with the inner sliding sleeve 33. At this time, when the inner sliding sleeve 33 and the outer sliding sleeve 34 continued to slide under the drive of the pressure rod 2, they would pass through the area of ​​the wedge block 32 and Sliding along the outer wall of the smooth rod 31, the smooth rod 31 does not apply tension to the base 41 in this state, thereby keeping the anchor rod in its current state and preventing further riveting, thus avoiding over-riveting. Subsequently, the worker can break and detach the rivet by twisting it. Through the setting of the transmission mechanism 3, the inner sliding sleeve 33 and the outer sliding sleeve 34 cooperate through relative movement to indirectly convert the tension into the contraction movement of the wedge block 32. When the tension during operation is greater than the set value, the two wedge blocks 32 can automatically retract into the smooth rod 31, thereby stopping the effective transmission, maintaining the current rivet state, and achieving over-riveting protection.

[0048] Please see Figure 3 - Figure 9 In another embodiment:

[0049] The transmission mechanism 3 also includes an adjustment part 5, which includes a slotted ring 51 rotatably mounted inside the housing 1. A lever 52 is connected to the outer wall of the slotted ring 51. Two long slots are formed on the inner side of the slotted ring 51. A second sliding shaft 351 is connected to the outer wall of the pressure ring 35. A guide groove for sliding of the second sliding shaft 351 is formed on the outer sliding sleeve 34. The part of the second sliding shaft 351 protruding from the outer sliding sleeve 34 is located in the long slot of the slotted ring 51. The pressure ring 35 can be adjusted axially by rotating its thread, thereby changing the pre-compression of the second spring, so as to set the tension value of triggering the wedge block 32 to contract. When it is necessary to adjust the set tension value, the lever 52 is moved to drive the slotted ring 51 to rotate, and the second sliding shaft 351 slides. Connected to the long groove of the slotted ring 51, when the slotted ring 51 rotates, its long groove applies a circumferential force to the second sliding shaft 351, causing the second sliding shaft 351 to drive the pressure ring 35 to rotate, thereby causing the pressure ring 35 to make axial fine adjustments. At the same time, the second sliding shaft 351 slides smoothly along the guide groove. By adjusting the position of the pressure ring 35, the preload of the second spring can be precisely adjusted. When the pressure ring 35 increases the compression of the second spring, a greater force is required to trigger the wedge block 32 to retract, resulting in a higher tension setting value. Therefore, by setting the adjustment part 5, the operator can adjust the tension setting value for triggering the wedge block 32 to retract by turning the lever 52, which is convenient for use under different working conditions.

[0050] In addition, the lever 52 extends through to the outside of the housing 1. A set of scale lines is provided on the outer wall of the housing 1 in the area next to the lever 52. The scale lines on the outer wall of the housing 1 correspond one-to-one with the corresponding tension setting value. When the lever 52 moves to one of the scale lines, the scale line indicates the tension required to trigger the retraction of the wedge block 32. The operator can align the scale according to the actual working conditions such as the rivet type and plate thickness to accurately set the critical tension to prevent over-riveting.

[0051] Please see Figure 3 , Figure 6 In another embodiment:

[0052] It is worth noting that the smooth rod 31 is equipped with a prompting part 6, which includes an airbag 61. The airbag 61 is installed inside the smooth rod 31 and is connected to an air whistle 62. The end of the reciprocating rod 37 near the airbag 61 is connected to a pressure plate 63. The airbag 61 is located on the movement trajectory of the pressure plate 63. When the wedge block 32 is about to retract, the pressure plate 63 on the reciprocating rod 37 moves synchronously with the reciprocating rod 37 and squeezes the airbag 61. The airbag 61 is compressed and quickly exhausts air. The airflow passes through the air whistle 62 and produces a sound, which visually indicates that the riveting is in place and the mechanism has stopped pulling. Combined with the change in the feel of the operator pressing the pressure rod 2, the operator can promptly judge that the anti-over-riveting protection has been triggered, which facilitates the operator to perform the corresponding operation.

[0053] Please see Figure 2, Figure 10 In another embodiment:

[0054] The housing 1 has an opening for performing riveting operations. A clamping mechanism 7 is installed within the opening of the housing 1. The clamping mechanism 7 includes two elastic blocks 71, both of which are vertically slidably connected within the housing 1. Each elastic block 71 has a notch for matching the rivet core. The sides of each elastic block 71 away from each other have inclined surfaces. Each of the two inclined surfaces has a contact rod 72 connected to a contact rod 72, which contacts the inclined surfaces of the two elastic blocks 71. A third spring is located between the two elastic blocks 71. When the two contact rods 72 move away from the elastic blocks 71, they can move the two elastic blocks 71 closer together via the inclined surfaces. The working opening of the housing 1 is used to insert rivets and place the rivet core between the two clamping blocks 43. During the riveting operation, as the two inclined rods 42 move, the two contact rods 72 move along the inclined surfaces of the two elastic blocks 43. The inclined surfaces of the two elastic blocks 71 slide and apply force, causing them to move closer together and clamp the rivet core. When the pressure rod 2 is pressed into place, the clamping force of the two elastic blocks 71 on the rivet core reaches its maximum value. The elastic blocks 71 are made of elastic material, and their contact parts with the rivet core can deform with the outer wall of the rivet core, thus ensuring fit and avoiding rigidity failure. When the riveting is finished, the two elastic blocks 71 clamp the root of the rivet core. At this time, the notches of the two elastic blocks 71 fit with the outer wall of the rivet core, which can play a positioning role and prevent the rivet core from shifting. In addition, assuming that the rivet core does not fall off by itself, the operator can shake the housing 1 to make the two elastic blocks 71 move the root of the rivet core, thereby promoting the detachment of the rivet core. After the pressure rod 2 is released, the two elastic blocks 71 are reset by the elastic force of the third spring.

[0055] When using this rivet gun with a torque feedback anti-over-rivet control mechanism, the operator first moves the lever 52 extending outside the housing 1, causing the slotted ring 51 to rotate. The pre-compression of the second spring is adjusted via the second sliding shaft 351 and the pressure ring 35. The critical anti-over-rivet torque is precisely set according to the scale lines on the outer wall of the housing 1. Then, the rivet core is placed into the working hole of the housing 1, where it is engaged between two clamping blocks 43. The first spring supports the clamping blocks 43 to accommodate rivet cores of different specifications. Pressing the pressure rod 2 causes the outer sliding sleeve 34 of the transmission mechanism 3 to move using a lever principle. The outer sliding sleeve 34 pushes the inner sliding sleeve 33 via the second spring, pushing the wedge block 32. This causes the smooth rod 31 to slide the base 41 within the housing 1. The two inclined rods 42 on the base 41 push the clamping blocks 43 to clamp the rivet core and initiate the riveting operation. During normal riveting, the power is maintained throughout the entire process. Smooth transmission occurs. Once the riveting torque exceeds the preset value, the second spring is overcompressed, causing the outer sliding sleeve 34 and the inner sliding sleeve 33 to slide relative to each other. This causes the sliding rod 36 to move along the through groove and pushes the reciprocating rod 37 to move. The reciprocating rod 37 drives the groove ring 38 to rotate through the spiral groove on its surface and the sliding tongue on the inner wall of the groove ring 38. The groove ring 38 uses the arc groove to pull the first sliding shaft 321, causing the two wedges 32 to retract into the smooth rod 31, cutting off the power transmission and stopping the continued pulling to prevent over-riveting. At the same time, the pressure plate 63 at the end of the reciprocating rod 37 squeezes the airbag 61 in the inner indicator part 6 of the smooth rod 31. The airflow passes through the air whistle 62 and sounds, reminding the operator that the riveting is in place. Finally, the pressure rod 2 is released, and the pressure rod 2 is reset under the action of the reset leaf spring. The transmission mechanism 3, the reciprocating rod 37, the groove ring 38, and the wedges 32 all return to their original positions, and the whole machine returns to its initial state, ready for the next riveting operation.

[0056] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A rivet gun with a torque feedback anti-over-rivet control mechanism, characterized in that, Includes a housing (1), on which a pressure rod (2) is hinged; The housing (1) is provided with a riveting mechanism (4); The housing (1) is provided with a transmission mechanism (3), which is connected between the pressure rod (2) and the riveting mechanism (4). When the pressure rod (2) is pressed, it drives the riveting mechanism (4) to run through the transmission mechanism (3). The transmission mechanism (3) can temporarily disconnect the transmission when the pulling force during riveting exceeds the set value.

2. A rivet gun with a torque feedback anti-over-rivet control mechanism according to claim 1, characterized in that: The riveting mechanism (4) includes a base (41) which is slidably installed inside the housing (1). Two inclined rods (42) are connected to the base (41). The two inclined rods (42) are inclined in a constricted shape on the side close to each other. Clamping blocks (43) are slidably connected to the side close to each other of the two inclined rods (42).

3. A rivet gun with a torque feedback anti-over-rivet control mechanism according to claim 2, characterized in that: The clamping block (43) is provided with anti-slip texture, and a first spring is provided between the clamping block (43) and the inclined rod (42).

4. A rivet gun with a torque feedback anti-over-rivet control mechanism according to claim 2, characterized in that: The transmission mechanism (3) includes a light rod (31), which is connected to the base (41). Two wedges (32) are embedded and slidably installed on the light rod (31). An inner sliding sleeve (33) is slidably sleeved on the outer wall of the light rod (31). An outer sliding sleeve (34) is slidably sleeved on the outer wall of the inner sliding sleeve (33). A pressure ring (35) is connected to the inner wall of the outer sliding sleeve (34). A second spring is provided between the pressure ring (35) and the outer sliding sleeve (34). The wedges (32) are in contact with the inner sliding sleeve (33). The outer sliding sleeve (34) is movably connected to the pressure rod (2). When the pressure rod (2) is pressed, it uses the lever principle to drive the outer sliding sleeve (34) to move away from the base (41).

5. A rivet gun with a torque feedback anti-over-rivet control mechanism according to claim 4, characterized in that: The inner wall of the outer sliding sleeve (34) is connected to a sliding rod (36). The smooth rod (31) and the inner sliding sleeve (33) are provided with a through groove for the sliding rod (36) to slide. The sliding rod (36) is connected to a reciprocating rod (37). The inner wall of the smooth rod (31) is rotatably installed with a grooved ring (38). When the reciprocating rod (37) moves, it can drive the grooved ring (38) to rotate. When the grooved ring (38) rotates, it can drive two wedges (32) to retract into the smooth rod (31).

6. A rivet gun with a torque feedback anti-over-rivet control mechanism according to claim 5, characterized in that: The surface of the reciprocating rod (37) is provided with a spiral groove, and the grooved ring (38) is sleeved on the reciprocating rod (37). The inner wall of the grooved ring (38) is provided with a sliding tongue that is slidably connected to the spiral groove. The wedge (32) is connected with a first sliding shaft (321). The grooved ring (38) has two arc-shaped grooves. The two first sliding shafts (321) are slidably connected to the two arc-shaped grooves respectively. When the grooved ring (38) rotates, it drives the two first sliding shafts (321) to move synchronously closer to the center of the grooved ring (38) through the arc-shaped grooves.

7. A rivet gun with a torque feedback anti-over-rivet control mechanism according to claim 6, characterized in that: The transmission mechanism (3) also includes an adjustment part (5), which includes a groove ring (51). The groove ring (51) is rotatably installed inside the housing (1). A lever (52) is connected to the outer wall of the groove ring (51). Two long grooves are opened on the inner side of the groove ring (51). A second sliding shaft (351) is connected to the outer wall of the pressure ring (35). A guide groove for sliding the second sliding shaft (351) is opened on the outer sliding sleeve (34). The part of the second sliding shaft (351) protruding from the outer sliding sleeve (34) is located in the long groove of the groove ring (51).

8. A rivet gun with a torque feedback anti-over-rivet control mechanism according to claim 7, characterized in that: The lever (52) extends through to the outside of the housing (1), and a set of scale lines are provided on the outer wall of the housing (1) in the area next to the lever (52).

9. A rivet gun with a torque feedback anti-over-rivet control mechanism according to claim 5, characterized in that: The light rod (31) is provided with a prompting part (6), the prompting part (6) includes an airbag (61), the airbag (61) is installed in the light rod (31), the airbag (61) is connected to an air whistle (62), the end of the reciprocating rod (37) near the airbag (61) is connected to a pressure plate (63), and the airbag (61) is located on the movement trajectory of the pressure plate (63).

10. A rivet gun with a torque feedback anti-over-rivet control mechanism according to claim 2, characterized in that: The housing (1) is provided with an opening for performing riveting operations. A clamping mechanism (7) is provided in the opening of the housing (1). The clamping mechanism (7) includes two elastic blocks (71). The two elastic blocks (71) are vertically slidably connected in the housing (1). The elastic blocks (71) are provided with recesses for matching rivet cores. The two elastic blocks (71) are provided with inclined surfaces on the side away from each other. The two inclined rods (42) are respectively connected with abutting rods (72). The two abutting rods (72) are in contact with the inclined surfaces of the two elastic blocks (71). A third spring is provided between the two elastic blocks (71). When the two abutting rods (72) move away from the elastic blocks (71), they can drive the two elastic blocks (71) to move closer to each other through the inclined surfaces.

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