Planetary reduction gear and riveting gun

Abstract

The utility model discloses a planetary reduction gear which comprises a gear fixing seat, a gear connecting seat and a reduction mechanism arranged between the gear fixing seat and the gear connecting seat. The speed reduction mechanism comprises a first-stage planetary speed reduction set, a second-stage planetary speed reduction set and a third-stage planetary speed reduction set, one end of the planet carrier is assembled on the first-stage planetary speed reduction group; the second-stage planetary speed reduction group is assembled at the other end of the planet carrier; the shaft gear is assembled on the secondary planetary reduction group; the second-stage planetary speed reduction set comprises a sliding clutch gear ring, a second-stage planetary gear set is connected into an inner cavity of the sliding clutch gear ring in a meshed mode, and a second-stage planetary carrier is connected to the second-stage planetary gear set. The utility model further discloses a riveting gun using the planetary reduction gear. According to the planetary speed reducer, speed reduction is achieved through planetary speed reduction, two-stage speed-adjustable planetary speed reduction and transmission of transmission teeth on the same axis, and speed reduction transmission and riveting are achieved through the structure and a lead screw structure for driving a riveting gun.

Description

Technical Field

[0001] The utility model relates to the technical field of rivet guns, in particular to a planetary speed reduction device and a rivet gun. Background Art

[0002] Rivet guns are common riveting tools, which are widely used in construction, automobiles, ships, electrical appliances and other production fields.

[0003] The rivet guns in the prior art mainly include pneumatic, manual and electric rivet guns. The rigid requirement of a pneumatic rivet gun is that it must have an air source. When in use, the rivet gun must be connected to the air source by an air pipe. It is noisy and not environmentally friendly to use. The large-pull pneumatic rivet tools are bulky. Manual rivet tools are difficult to rivet large-pull rivets. Electric rivet tools are easy to work outdoors and at high altitudes, or they cannot adjust the tension at high and low speeds, or the two-speed tools are too long, making it difficult to complete riveting in a small space. For example, the electric rivet gun in patent 2015202181849 cannot achieve speed regulation, and the electric rivet tool in patent 2014105739927 can adjust the speed, but the structure is complex, making the tool longer, and it is not suitable for adding other structures or devices. Utility Model Content

[0004] The utility model aims to provide a planetary speed reduction device and a rivet gun, which can adjust the pulling force at high and low speeds.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A planetary reduction gear comprises a gear fixing seat and a gear connecting seat, which are fixedly connected, and a reduction mechanism arranged between the gear fixing seat and the gear connecting seat; the reduction mechanism comprises at least two reduction groups; a primary planetary reduction group, which is assembled at one end of the gear fixing seat; a planet carrier, one end of which is assembled on the primary planetary reduction group; a secondary planetary reduction group, which is assembled on the other end of the planet carrier; a shaft gear, which is assembled on the secondary planetary reduction group, extends out of the gear connecting seat, cooperates with the external components of the planetary reduction gear, and outputs the power of the reduction mechanism;

[0007] The secondary planetary reduction group comprises a sliding clutch gear ring, a secondary planetary gear group is meshedly connected in the inner cavity of the sliding clutch gear ring, and a secondary planetary carrier is connected to the secondary planetary gear group;

[0008] The sliding clutch gear ring is movably connected to the planet carrier in the speed reduction mechanism.

[0009] Furthermore, a shaft gear is fixed on the end face of the secondary planetary carrier close to the gear connection seat wall, and a connecting rod is provided on the other end face to be installed in cooperation with the secondary planetary gear.

[0010] Furthermore, the first-stage planetary reduction group includes a first-stage ring gear; the first-stage ring gear is connected to the inner cavity of the gear fixing seat, and a first-stage planetary gear set is meshedly connected in the inner cavity of the first-stage ring gear; the center of the first-stage planetary gear set is meshedly connected to the motor transmission teeth.

[0011] Furthermore, the planet carrier includes a large gear, a small gear is arranged on the end face of the large gear close to the shaft gear, and a connecting rod is arranged on the other end face; the small gear is connected to the secondary planetary reduction group.

[0012] Furthermore, a plurality of groups of engaging grooves are provided on the side wall of the gear connecting seat, and engaging teeth are provided on the side wall of the sliding clutch gear ring corresponding to the engaging grooves, and the engaging grooves engage and disengage with the engaging teeth.

[0013] Furthermore, a lever spring is arranged on the outer side wall of the gear fixing seat and at a position corresponding to the sliding clutch gear ring.

[0014] Furthermore, a lever switch button is arranged on the side wall of the lever spring, and a fixed oblique stopper is arranged on the side wall of the gear fixing seat and corresponding to the lever spring.

[0015] A rivet gun uses the planetary reduction device.

[0016] A rivet gun comprises a large gear, a nut and a screw rod, and also comprises a planetary reduction device, wherein the shaft gear of the planetary reduction device is meshed with the large gear, the large gear is fixed on the nut, and the nut is matched and connected with the screw rod.

[0017] Furthermore, the rivet gun is also provided with a gas storage and release device; the gas storage and release device includes a cylinder body; a piston mechanism is arranged in the inner cavity of the cylinder body; the piston mechanism includes a piston and a return spring; it also includes a limit switch for locking and releasing the cylinder body; the slider trigger is used to trigger the limit switch and is fixed on the thrust block; the thrust block is fixed to the end of the screw rod in the rivet gun away from the rivet gun head, and acts on the piston mechanism to generate high-pressure gas; it also includes a negative pressure generator and a solenoid valve; the solenoid valve is respectively connected to the negative pressure generator and the cylinder body to control the connection between the negative pressure generator and the cylinder body.

[0018] The utility model realizes deceleration by designing a planetary reduction, a two-stage adjustable speed planetary reduction and a transmission tooth transmission on an axis. The structure realizes deceleration transmission and riveting together with a screw rod structure driving a rivet gun. It can not only realize rapid riveting of rivets with weaker structures and lower tensile force at a high-speed gear, but also realize riveting of rivets with strong structures and large tensile force at a low-speed gear, thus realizing riveting of most rivets of almost all sizes with one tool, and the utility model has a simple structure and a small size.

[0019] The planetary reduction device of the rivet gun of the utility model can control the extension and retraction of the transmission teeth, thereby better meeting various transmission requirements of the external gears.

[0020] The utility model rivet gun is also equipped with a gas storage and release device, which can automatically collect the rivet rods during use. More importantly, it does not need to be connected to an external gas source, is easy to carry and use, and can achieve unlimited endurance of the rivet suction power. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram I of the explosion state of the planetary reduction device of the utility model.

[0022] Figure 2 This is a schematic diagram II of the explosion structure of the planetary reduction device of the utility model.

[0023] Figure 3 This is a schematic structural diagram of a rivet gun according to Embodiment 2 of the present utility model.

[0024] Figure 4 This is a state schematic diagram I of a rivet gun according to Embodiment 3 of the present utility model.

[0025] Figure 5 This is a schematic diagram of the connection structure between the cylinder body and the piston in Example 3 of the utility model.

[0026] Figure 6 This is a schematic diagram of the structure of the negative pressure generator of Example 3 of the utility model.

[0027] Figure 7 Schematic diagram II of the state of the rivet gun in embodiment 3 of the utility model.

[0028] Figure 8 Schematic diagram III of the state of the rivet gun of the utility model embodiment 3. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0030] The planetary reduction device of the utility model comprises a gear fixing seat 1, a reduction mechanism and a gear connecting seat 2 in sequence, wherein the gear fixing seat 1 and the gear connecting seat 2 are fixed, and the reduction mechanism is assembled therein. The reduction mechanism comprises a primary planetary reduction group 3, a planet carrier 4, a secondary planetary reduction group 5 and a shaft gear 6 in sequence.

[0031] Embodiment 1, as Figure 1 ,2 As shown, the primary planetary reduction group 3 includes a primary ring gear 301, which is arranged in the inner cavity of the gear fixing seat, and the inner cavity of the primary ring gear 301 is meshedly connected with a primary planetary gear set 302, and the center of the primary planetary gear set 302 is meshedly connected with a motor transmission tooth 303. The primary planetary gear set 302 can have more than two planetary gears, and in this embodiment, there are three.

[0032] The planet carrier 4 has external teeth and includes a large gear 401. A small gear 402 is provided on the end surface of the large gear 401 close to the gear connection seat 2, and a connecting rod 403 is provided on the other end surface of the large gear 401. The connecting rod 403 is provided corresponding to the primary planetary gear set 302 and is used to fix the primary planetary gear set 302.

[0033] The secondary planetary reduction group 5 includes a sliding clutch gear ring 501, a secondary planetary gear group 502 is meshedly connected in the inner cavity of the sliding clutch gear ring 501, and a secondary planet carrier 503 is connected to the secondary planetary gear group 502. The secondary planetary gear group 502 can have more than two planetary gears, and in this embodiment, there are four. The secondary planetary gear group 502 cooperates with the pinion 402.

[0034] The secondary planetary carrier 503 is connected to the shaft gear 6 on one end face close to the wheel connecting seat 2 for connecting to the external gear to transmit power; the other end face is provided with a connecting rod 504 and the secondary planetary gear set 502 is correspondingly provided with a connecting rod 504, which is connected with the secondary planetary gear 1042.

[0035] The utility model provides a lever spring 7 on the outer wall of the gear fixing seat 1 and at a position corresponding to the slidable clutch gear ring. The side wall of the gear connecting seat 2 is provided with multiple groups of bite grooves 201, and the side wall of the sliding clutch gear ring 501 is provided with bite teeth 5011 at positions corresponding to the bite grooves, and the gap between the bite grooves 201 and the bite teeth 5011 is matched.

[0036] The lever switch button 8 is arranged on the side wall of the lever spring 7 of the utility model, and a fixed oblique stopper 9 is arranged on the side wall of the gear fixing seat 1 and at a position corresponding to the lever spring. The lever spring is moved to drive the sliding clutch gear ring to move in the inner cavity of the gear fixing seat, so that the sliding clutch gear ring and the large gear on the planetary carrier with external teeth are meshed with each other, and the bite groove and the bite teeth are mutually clutched. Example 2

[0037] like Figure 3 As shown, a rivet gun is applied with the planetary reduction device of the utility model. Most existing rivet guns are provided with a screw transmission device, and the shaft gear 6 of the utility model is connected with the rotating gear 10 on the screw transmission device to drive the screw transmission device.

[0038] The working principle of the planetary reduction device and the rivet gun in this embodiment is as follows:

[0039] When using a rivet gun, insert the rivet into the rivet connection mouth, press the lever switch button, and move the lever spring, thereby driving the sliding clutch gear ring to move in the inner cavity of the gear fixing seat, so that the sliding clutch gear ring and the large gear of the planetary frame are meshed with each other, and the meshing groove and the meshing teeth are mutually clutched; start the drive motor 12, drive the driving end of the motor to rotate, drive the motor transmission teeth to rotate, and the motor transmission teeth are meshed and connected at the center of the first-stage planetary gear set. The first-stage planetary set rotates and drives the planetary frame to rotate. Under the condition that the sliding clutch gear ring and the large gear on the planetary frame are meshed with each other, the sliding clutch gear ring is driven to rotate, and then the shaft gear 106 is driven to rotate, and then a first-stage reduction is formed, so that the shaft gear drives the rotating gear to rotate. When the rotating gear rotates, it drives the rivet gun screw transmission device, so as to perform the riveting work of the rivet.

[0040] After that, according to the needs, the lever switch button can be pressed again to move the lever spring, driving the sliding clutch gear ring to move in the inner cavity of the gear fixing seat, so that the sliding clutch gear ring and the large gear on the planetary carrier are mutually clutched, and the meshing groove and the meshing teeth are mutually fixed. At this time, the large gear is located between the sliding clutch gear ring and the first-stage gear ring. Start the drive motor 12 to drive the motor transmission teeth to rotate, drive the first-stage planetary gear set to rotate, drive the planetary carrier to rotate, and then drive the pinion gear to rotate. At this time, the second-stage planetary gear meshing with the pinion gear rotates, driving the shaft gear to rotate, and then forming a second-stage reduction, so that the shaft gear drives the rotating gear to rotate. When the rotating gear rotates, it drives the rivet gun screw transmission device, so as to perform the riveting work of the rivet. Example 3

[0041] like Figure 3 The figure is a schematic diagram of the structure of Example 2 of the utility model after adding a gas storage and release device.

[0042] The gas storage and release device includes a cylinder body 13, in which a piston 14 is arranged in the inner cavity of the cylinder body 13, so that the piston 14 and the cylinder body 13 can move relative to each other, and a return spring 15 is arranged between the cylinder body 13 and the piston 14 and on the outer wall of the cylinder body 13, so that the cylinder body 13 and the piston 14 can be quickly reset after displacement.

[0043] like Figure 4 As shown, the cylinder body 13 includes a vertical portion 1301, a horizontal portion 1302 is arranged on one side of the vertical portion 1301, and a cavity is formed between the horizontal portion 1302 and the vertical portion 1301. A through hole is arranged in the middle of the vertical portion 1301 for communicating with the electromagnetic valve.

[0044] like Figure 4As shown, the horizontal interface of the piston 14 is a special-shaped "I" shape, including a main body 1401, and a vertical part I1402 is provided on the side of the main body 1401 close to the cylinder body 13 to support the main structure; a groove 1403 is provided on the main body 1401 between the vertical part I1402 and the end of the side, and a ball 1405 is installed in the groove 1403, and the ball 1405 extends out of the groove 1403 and contacts the inner wall of the cylinder body 1. The ball 1405 can roll in the cylinder body 13 to achieve the effect of moving the piston 14 in the cylinder body 13, and at the same time, the ball 1405 can keep the piston 14 and the cylinder body 13 airtight.

[0045] like Figure 4 As shown, a protrusion 1406 is provided on the other side of the main body 1401, and the protrusion 1406 is connected to one end of the return spring 15; the other end of the return spring 15 is connected to the vertical portion 1301 of the cylinder body 13 and is located on the outer wall of the cylinder body 13. The movement between the piston 14 and the cylinder body 13 will apply force to the return spring 15.

[0046] The negative pressure generator is sleeved on one end of the conduit 16, and the other end of the conduit 16 is connected to the hollow part of the screw rod 17. A nail outlet pipe is set through the middle of the screw rod of the rivet gun for sending out the waste nail rod, and the conduit 16 of the utility model is connected to the nail outlet pipe. The negative pressure generator includes a front end 1601, a middle end 1602 and a rear end 1603, which are connected in sequence. The diameter of the front end 1601 is smaller than that of the rear end 1603, and the diameter of the rear end 1603 is smaller than that of the middle end 1602. The front end 1601 is connected to the solenoid valve, a negative pressure chamber 1604 is formed between the middle end 1602 and the conduit 16, and a small gap 1605 is formed between the rear end 1603 and the conduit 9. The middle end 1602 is close to the screw rod and is connected to the conduit 16 through a ball I (similar to the setting of the ball 140), so that the negative pressure generator can move on the conduit.

[0047] The thrust block 21 is fixed to the end of the screw rod 17 in the rivet gun away from the gun head. The thrust block 21 contacts and connects to the outside of the vertical portion 1301 of the cylinder body 13. As the screw rod rotates, the thrust block 21 moves toward the rear end of the rivet gun, pushing the cylinder body 13 to move toward the protrusion 1406 of the piston 14 (which remains fixed), so that high-pressure gas is generated in the cylinder body 1.

[0048] The limit unit includes a slider trigger 18 and a limit switch 19. The limit switch 18 is used to control the position of the cylinder 13. The limit switch 19 limits the cylinder, and the slider trigger 18 is connected to the thrust block 10. At the beginning of riveting, the screw rod pushes the piston to generate compressed air. After reaching the required position (the riveting work is completed at this time), the limit switch 18 provides a limit, and the trigger 18 is driven by the screw rod movement to trigger the limit switch 19. When the screw rod is about to be completely reset and the three claws are opened, the solenoid valve opens, and the compressed air is transmitted to the negative pressure generator, sucking the rivet rod into the nail rod collection tube. At the same time, the slider trigger opens the limit switch, and the cylinder is reset under the action of the spring force.

[0049] The control unit electromagnetic valve 20 of this embodiment is connected to the cylinder 13 and the negative pressure generator respectively, and is used to control the delivery of the gas in the cylinder 13 to the negative pressure generator 8. The electromagnetic valve 20 of this embodiment is connected to the cylinder 13 by a retractable pipe fitting to facilitate the movement of the cylinder 13.

[0050] The working principle of the rivet gun in this embodiment is as follows:

[0051] like Figure 3 The figure shows the original state of the rivet gun in this embodiment.

[0052] like Figure 6 As shown, when using the rivet gun of the utility model, first insert the rivet 21 from the gun nozzle of the rivet gun, then start the switch on the rivet gun, so that the rivet gun clamps the rivet and the screw rod 17 moves backward under the rotation of the screw rod 17. The thrust block 21 moves backward, pushing the cylinder body 13 to move, the piston 14 is in a fixed state, and the air in the closed space formed between the cylinder body 13 and the piston 14 is compressed. When the screw rod 5 moves backward to the maximum limit, the rivet is cut off, the cylinder body 14 is fixed by the limit switch 19, and the high-pressure gas is charged.

[0053] like Figure 7 As shown, after the high-pressure gas is charged, the screw rod automatically resets until the three claws touch the gun head and release the claws, and the waste nail rod is released. The solenoid valve 20 is opened, and the high-pressure gas in the cylinder 13 is input to the negative pressure generator, forming a negative pressure in the negative pressure chamber 1604, sucking the waste nail rod sent from the front end of the rivet gun into the rear end of the rivet gun, completing the collection of the rivet rod.

[0054] The screw rod 5 continues to fully reset forward, the limit switch 19 opens, and the elastic force of the reset spring 3 resets the cylinder body 1 to the Figure 4 The initial state.

[0055] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A planetary reduction gear, comprising a gear fixing seat and a gear connecting seat, the two being fixedly connected, characterized in that: It also includes a speed reduction mechanism arranged between the gear fixing seat and the gear connecting seat; The speed reduction mechanism comprises at least two stages of speed reduction groups; The first-stage planetary reduction group is assembled at one end of the gear fixing seat; A planet carrier, one end of which is assembled on the first-stage planetary reduction group; The secondary planetary reduction group is assembled on the other end of the planet carrier; The shaft gear is assembled on the secondary planetary reduction group, extends out of the gear connection seat, cooperates with the external components of the planetary reduction device, and outputs the power of the reduction mechanism; The secondary planetary reduction group comprises a sliding clutch gear ring, a secondary planetary gear group is meshedly connected in the inner cavity of the sliding clutch gear ring, and a secondary planetary carrier is connected to the secondary planetary gear group; The sliding clutch gear ring is movably connected to the planet carrier in the speed reduction mechanism.

2. A planetary reduction gear according to claim 1, characterized in that: The secondary planetary carrier has a fixed shaft gear on its end face close to the gear connection seat wall, and a connecting rod is arranged on the other end face to be installed in coordination with the secondary planetary gear.

3. A planetary reduction gear according to claim 1, characterized in that: The first-stage planetary reduction group includes a first-stage ring gear; the first-stage ring gear is arranged in the inner cavity of the gear fixing seat, and a first-stage planetary gear group is meshed and connected in the inner cavity of the first-stage ring gear; the center of the first-stage planetary gear group is meshed and connected with the motor transmission teeth.

4. A planetary reduction gear according to claim 1, characterized in that: The planet carrier includes a large gear, a small gear is arranged on the end face of the large gear close to the shaft gear, and a connecting rod is arranged on the other end face; the small gear is connected to the secondary planetary reduction group, and the connecting rod is connected to the primary planetary gear group.

5. A planetary reduction gear according to claim 1, characterized in that: A plurality of groups of engagement grooves are provided on the side wall of the gear connection seat, and engagement teeth are provided on the side wall of the sliding clutch gear ring in correspondence with the engagement grooves, and the engagement grooves engage and disengage with the engagement teeth.

6. A planetary reduction gear according to claim 1, characterized in that: A lever spring is arranged on the outer side wall of the gear fixing seat and at a position corresponding to the sliding clutch gear ring.

7. A planetary reduction gear according to claim 6, characterized in that: A lever switch button is arranged on the side wall of the lever spring, and a fixed oblique stopper is arranged on the side wall of the gear fixing seat and corresponding to the lever spring.

8. A rivet gun, using a planetary reduction gear as described in any one of claims 1 to 7.

9. A rivet gun according to claim 8, comprising a large gear, a nut and a screw rod, characterized in that It also includes a planetary reduction device, wherein the shaft gear of the planetary reduction device is meshed with a large gear, the large gear is fixed on a nut, and the nut is cooperatively connected with a lead screw.

10. A rivet gun according to claim 8 or 9, characterized in that: The rivet gun is also provided with a gas storage and release device; The gas storage and release device comprises a cylinder; a piston mechanism is arranged in the inner cavity of the cylinder; the piston mechanism comprises a piston and a return spring; It also includes a limit switch for locking and releasing the cylinder; a slider trigger for triggering the limit switch, which is fixed on the thrust block; The thrust block is fixed to the end of the screw rod in the rivet gun away from the rivet gun head, and acts on the piston mechanism to generate high-pressure gas; It also includes a negative pressure generator and a solenoid valve; the solenoid valve is connected to the negative pressure generator and the cylinder body respectively to control the connection between the negative pressure generator and the cylinder body.

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