Rivet gun

Abstract

The utility model discloses a riveting gun which comprises a shell, a motor and a control module. The front end of the shell is connected with a punch, the punch is connected with a sensing module, the sensing module is configured to detect signals of the punch in real time, and the control module is configured to detect the signals detected by the sensing module and judge whether a rivet to be machined completely abuts against the punch or not according to the signals; and when the to-be-machined rivet completely abuts against the punch, the control module is further configured to judge whether the to-be-machined rivet is snapped or not according to the change of the signal. The pressure of the machine head is detected through the sensing module, nailing is carried out under the condition that the machine head completely abuts against a rivet, the internal core-pulling element is rapidly reset after nailing is completed, and the working efficiency is improved.

Description

[Technical field]

[0001] The utility model relates to the field of electric tools, in particular to a rivet gun. [Background Technology]

[0002] Existing DC rivet guns all use motors to drive internal core pulling elements to move back and forth to pull off rivets of different specifications and then reset. The core pulling stroke of most rivet guns on the market is sensed by two Hall elements. A Hall element is set at each end of the working stroke of the rivet gun, and a magnet is set on the internal core pulling element. The moving distance of the magnet between the two Hall elements is the core pulling stroke of the rivet gun. In actual use, due to the different specifications of rivets, the required rivet pulling stroke is also different. In order to enable the rivet gun to cover rivets of multiple specifications, the core pulling stroke is usually made very long. Therefore, even for small-sized rivets with a shorter rivet pulling stroke, it is necessary to wait until the stroke is completed before retracting, which will cause low working efficiency of the rivet gun.

[0003] Please refer to Chinese utility model patent No. CN217492587U announced on September 27, 2022, which discloses a rivet gun. When the specification of rivet A pulled by the rivet gun is smaller than the maximum specification, the motor drives the screw to pull rivet A in the forward direction until rivet A is broken, and the current sensor detects that the current value in the working circuit decays to a preset current value. At this time, the controller controls the motor to reverse to reset the screw. This control method determines whether it is necessary to retreat in advance after nailing by detecting current decay. However, the current will be affected by many factors during the working process, such as motor stalling, phase line disconnection and other faults, and it cannot accurately determine whether the current decay is caused by the completion of nailing, which is easy to cause misjudgment.

[0004] In view of this, it is necessary to provide an improved rivet gun to overcome the defects of the prior art. [Contents of the utility model]

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a rivet gun which can ensure that there is no crooked nail or missing nail during nailing and can quickly complete the nailing work.

[0006] The utility model adopts the following technical solution to solve the problems of the prior art: a rivet gun, comprising: a shell, a motor arranged in the shell and a control module connected to the motor; a punch is connected to the front end of the shell, the punch is connected to a sensor module, the sensor module is configured to detect the signal of the punch in real time, the control module is configured to detect the signal detected by the sensor module, and judge whether the rivet to be processed is completely abutted with the punch according to the signal; when the rivet to be processed is completely abutted with the punch, the control module is also configured to judge whether the rivet to be processed is pulled off according to the change of the signal.

[0007] A further improved solution is: the sensing module includes a pressure sensor, and the pressure sensor is configured to detect the pressure of the punch.

[0008] A further improvement is as follows: the rivet gun further comprises a switch module, the switch module is connected to the control module, and when the control module detects signals from the punch and the switch module at the same time, the control module controls the motor to rotate.

[0009] A further improvement scheme is: a first threshold, a second threshold and a third threshold are stored in the control module, and the control module is also configured to control the motor to rotate forward when the detected signal is greater than the first threshold, and to control the motor to rotate reversely when the detected signal is greater than the second threshold and decays to the third threshold within a certain period of time, wherein the first threshold is less than the second threshold.

[0010] A further improvement is: pressing the switch module and pressing the punch at the same time, when the control module detects that the pressure of the punch is greater than the first threshold, the punch is completely in contact with the rivet to be processed, and the motor rotates forward.

[0011] A further improvement is: pressing the switch module and pressing the punch at the same time, when the control module detects that the pressure of the punch is less than or equal to the first threshold, the punch and the rivet to be processed are not completely in contact, there is a phenomenon of no nail or crooked nail, and the motor does not rotate.

[0012] A further improved solution is: the rivet gun also includes a transmission module and an internal core-pulling element driven by the transmission module, and the internal core-pulling element is configured to pull off the iron core of the rivet to be processed.

[0013] A further improvement is as follows: when the control module detects that the pressure of the punch is greater than the second threshold and decays to the third threshold within a certain period of time, the iron core of the rivet to be processed is pulled apart by the internal core pulling element, and the motor reverses to drive the internal core pulling element to reset.

[0014] A further improvement is as follows: the process from the rivet to be processed being pulled out to the iron core being broken is the first working stage of the rivet gun. During the first working stage, the pressure sensor detects that the pressure of the punch gradually increases with time until the rivet is instantly broken, and the pressure reaches a maximum value.

[0015] A further improvement is as follows: the process from the rivet to be processed being pulled apart to the internal core pulling element being reset to its initial position is the second working stage of the rivet gun. During the second working stage, when the pressure sensor detects that the pressure of the punch decays to the third threshold in a short time, the control module controls the motor to reverse.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the sensor module detects the signal of the punch in real time, the control module detects the signal detected by the sensor module, and judges whether the rivet to be processed is completely in contact with the punch according to the signal; when the rivet to be processed is completely in contact with the punch, the control module judges whether the rivet to be processed is broken according to the change of the signal. The utility model detects the pressure of the punch through the sensor module, ensures that the punch is completely in contact with the rivet before nailing, and quickly resets the internal core pulling element after nailing, thereby improving work efficiency. [Drawings]

[0017] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the whole machine of the utility model rivet gun;

[0019] Figure 2 This is a sectional view of the entire rivet gun of the utility model;

[0020] Figure 3 This is a control flow chart of the utility model rivet gun;

[0021] Figure 4 It is a voltage curve diagram of the rivet gun of the utility model.

[0022] Meaning of the reference numerals in the figures:

[0023] Rivet gun 100 Housing 10

[0024] Main body 101 Grip 102

[0025] Punch 20 Motor 30

[0026] Control module 40 Transmission module 50

[0027] Sensor module 60 Switch module 70

[0028] Internal core pulling element 80 [Specific implementation method]

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings and implementation modes.

[0030] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the words "upper", "lower", "front", "back", etc., which indicate the orientation or position relationship, are only based on the orientation or position relationship shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] See also Figure 1 and Figure 2 As shown, it is a schematic diagram and a cross-sectional view of the whole machine of the rivet gun of the utility model, the rivet gun 100 includes a housing 10, a motor 30 arranged in the housing 10, a control module 40 connected to the motor 30, a transmission module 50 connected to the motor 30, and an internal core-pulling element 80 driven by the transmission module 50. The motor 30 includes a motor shaft (not numbered) extending in the axial direction, the transmission module 50 includes a planetary gear train mechanism and is connected to the axial end of the motor shaft, the transmission module 50 drives the internal core-pulling element 80 to move forward and backward to realize the nailing action, and the internal core-pulling element 80 is configured to pull off the iron core of the rivet to be processed.

[0032] The front end of the shell 10 is connected to a punch 20, and the punch 20 is connected to a sensor module 60. The sensor module 60 is connected to the control module 40. The sensor module 60 is configured to detect the signal of the punch 20 and then send the signal to the control module 40. In this embodiment, the sensor module 60 is preferably a pressure sensor, and the pressure sensor 60 is configured to detect the pressure of the punch 20.

[0033] The housing 10 further includes a main body 101 extending in the axial direction and a gripping portion 102 connected to the lower portion of the main body 101. The motor 30, the transmission module 50, the internal core pulling element 80 and the control module 40 are all arranged in the main body 101. The gripping portion 102 includes a switch module 70, which is connected to the control module 40 for the user to operate to control the start / stop of the motor 30. A battery pack (not shown) is also connected to the bottom of the gripping portion 102, and the battery pack is configured to power the rivet gun 100.

[0034] See also Figure 3As shown, it is a control flow chart of the rivet gun of the utility model. The user plugs the battery pack into the rivet gun 100, the battery pack supplies power to the rivet gun 100, installs the rivet to be processed into the punch 20, presses the switch module 70, and presses the punch 20 at the same time. The pressure sensor 60 detects the pressure signal of the punch 20 and sends it to the control module 40. The control module 40 is configured to detect the signal detected by the pressure sensor 60, and judge whether the rivet to be processed is completely abutted with the punch 20 according to the signal; when the rivet to be processed is completely abutted with the punch 20, the control module 40 is also configured to judge whether the rivet to be processed is pulled off according to the change of the signal.

[0035] In this embodiment, the control module 40 stores a first threshold value F0 in advance. When the pressure signal is greater than the first threshold value F0, it indicates that the rivet to be processed installed in the punch 20 is completely in contact with the punch 20 and can be nailed normally. The control module 40 controls the motor 30 to rotate forward. When the pressure signal is less than or equal to the first threshold value F0, it indicates that the rivet to be processed installed in the punch 20 is not completely in contact with the punch 20. The control module 40 controls the motor 30 not to rotate, so as to avoid crooked nails or no nails. Preferably, the first threshold value F0 is 5N. When the pressure signal is greater than 5N, the motor 30 rotates forward and can be nailed normally. When the pressure signal is less than or equal to 5N, the motor 30 does not rotate and cannot be nailed normally.

[0036] When entering the normal nailing process, the motor 30 rotates to drive the transmission module 50 to rotate to drive the internal core pulling element 80 to move forward, and the iron core of the rivet to be processed is pulled off. At the same time, the pressure sensor detects the pressure of the punch 20 in real time. The control module 40 also stores a second threshold F and a third threshold f. The second threshold F is a pressure value greater than the first threshold F0. When the control module 40 detects that the pressure of the punch 20 is greater than the second threshold F and decays to the third threshold f within a certain period of time, it indicates that the iron core of the rivet to be processed has been pulled off and the head of the rivet to be processed has been driven into the workpiece. The control module 40 controls the motor 30 to reverse to drive the internal core pulling element 80 to move backward back to the initial position, thereby realizing a complete nailing process. Preferably, the second threshold F is 200N, and the third threshold f is 100N. When the pressure of the punch 20 exceeds 200N and decreases to 100N within 1S, the iron core of the rivet to be processed is pulled off.

[0037] See also Figure 4As shown, it is a voltage curve diagram of the rivet gun of the utility model. The rivet gun 100 also includes two working stages. The process from the rivet to be processed being pulled out to the core being broken is the first working stage of the rivet gun 100. In the first working stage, the pressure sensor 60 detects that the pressure of the punch 20 gradually increases with time until the rivet is instantly broken, and the pressure reaches the maximum value, that is, the second threshold value F; the process from the rivet to be processed being broken to the internal core pulling element 80 being reset to the initial position is the second working stage of the rivet gun 100. In the second working stage, when the pressure sensor 60 detects that the pressure of the punch 20 decays to the third threshold value f in a short time, the control module 40 controls the motor 30 to reverse.

[0038] In the utility model, the switch module is pressed, and at the same time, the punch, when the control module detects that the pressure signal of the punch is greater than the first threshold value, the punch is completely in contact with the rivet to be processed, and the motor rotates forward to move the internal core-pulling element to perform nailing. When the control module detects that the pressure signal is greater than the second threshold value and decays to the third threshold value within a certain period of time, the nailing is completed, and the motor is controlled to reverse to reset the internal core-pulling element. The utility model detects the pressure of the punch through the sensor module to ensure that nailing is performed when the punch is completely in contact with the rivet, and the internal core-pulling element is quickly reset after nailing, thereby improving work efficiency.

[0039] The utility model is not limited to the above specific implementations. Those skilled in the art can easily understand that there are many other alternatives to the power tool of the utility model without departing from the principle and scope of the utility model. The protection scope of the utility model shall be based on the content of the claims.

Claims

1. A rivet gun, comprising: A shell, a motor arranged in the shell and a control module connected to the motor; characterized in that: a punch is connected to the front end of the shell, the punch is connected to a sensor module, the sensor module is configured to detect the signal of the punch in real time, the control module is configured to detect the signal detected by the sensor module, and judge whether the rivet to be processed is completely abutted with the punch according to the signal; when the rivet to be processed is completely abutted with the punch, the control module is also configured to judge whether the rivet to be processed is broken according to the change of the signal.

2. The rivet gun according to claim 1, characterized in that: The sensing module includes a pressure sensor configured to detect a pressure of the punch.

3. The rivet gun according to claim 2, characterized in that: The rivet gun further comprises a switch module, which is connected to the control module. When the control module detects signals from the punch and the switch module at the same time, it controls the motor to rotate.

4. The rivet gun according to claim 3, characterized in that: The control module stores a first threshold, a second threshold and a third threshold. The control module is also configured to control the motor to rotate forward when the detected signal is greater than the first threshold, and to control the motor to rotate reversely when the detected signal is greater than the second threshold and decays to the third threshold within a certain period of time, wherein the first threshold is less than the second threshold.

5. The rivet gun according to claim 4, characterized in that: The switch module is pressed and the punch is pressed at the same time. When the control module detects that the pressure of the punch is greater than the first threshold, the punch is completely in contact with the rivet to be processed, and the motor rotates forward.

6. The rivet gun according to claim 5, characterized in that: The switch module is pressed and the punch is pressed at the same time. When the control module detects that the pressure of the punch is less than or equal to the first threshold, the punch is not completely in contact with the rivet to be processed, and there is a phenomenon of no nail or crooked nail, and the motor does not rotate.

7. The rivet gun according to claim 5, characterized in that: The rivet gun further comprises a transmission module and an internal core-pulling element driven by the transmission module, wherein the internal core-pulling element is configured to pull off the iron core of the rivet to be processed.

8. The rivet gun according to claim 7, characterized in that: When the control module detects that the pressure of the punch is greater than the second threshold and decays to the third threshold within a certain period of time, the iron core of the rivet to be processed is pulled apart by the internal core-pulling element, and the motor reverses to drive the internal core-pulling element to reset.

9. The rivet gun according to claim 8, characterized in that: The process from the rivet to be processed being pulled out to the iron core being broken is the first working stage of the rivet gun. During the first working stage, the pressure sensor detects that the pressure of the punch gradually increases with time until the rivet is instantly broken, and the pressure reaches a maximum value.

10. The rivet gun according to claim 9, characterized in that: The process from the rivet to be processed being pulled apart to the internal core-pulling element being reset to the initial position is the second working stage of the rivet gun. During the second working stage, when the pressure sensor detects that the pressure of the punch decays to the third threshold in a short time, the control module controls the motor to reverse.

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