TWI787143B - Centrifugal reciprocating drive tool - Google Patents

Abstract

A centrifugal reciprocating transmission tool includes a reciprocating unit, a working unit and a power unit. The reciprocating unit includes a main housing surrounding and defining an inner chamber, a rotating member pivotally arranged in the inner chamber and surrounding defining a plurality of sliding grooves, and a plurality of accessories respectively accommodated in the sliding grooves. heavy block. The working unit includes a pipe housing fixed on the main housing, a detachably inserted receiving part at the bottom end of the pipe housing, a tool head arranged at the bottom end of the receiving part, and a above and in the striker in the tube housing. When the power unit drives the rotating part to rotate, it will change the direction of the chute. When one of the chute is facing downward, the counterweight will fall under the influence of centrifugal force and its own weight, and hit the impact part Point the tool head down to strike.

Description

Centrifugal reciprocating drive tool

The invention relates to a reciprocating tool, in particular to a durable and easy-to-remove centrifugal reciprocating transmission tool.

A general reciprocating tool uses a power source such as an engine, air pressure or hydraulic pressure to drive the transmission mechanism to drive the eccentric crank mechanism to operate. The eccentric crank mechanism is composed of eccentric cams connected to several connecting rods, and the ends of the connecting rods are connected to replaceable twigs. For working accessories such as shovels or picks, the transmission mechanism will drive the eccentric cam to rotate, thereby driving the connecting rod to reciprocate, and finally make the working accessories at the end reciprocate in the up and down direction. Although the aforementioned reciprocating tool can be used by the user in hand, and the operation accessories can be replaced according to different operation purposes, but in the operation process, the reciprocating operation accessories often need to hit or knock the object, and the reaction force generated by it It is quite large, and the elongated connecting rod is easily broken or damaged under the counterbalance of the driving force and the reaction force, and its mutual pivot connection is not easy to disassemble, replace and repair, so there is still a lot of room for improvement.

Therefore, the object of the present invention is to provide a reciprocating tool that is durable and easy to replace.

Therefore, the centrifugal reciprocating transmission tool of the present invention includes a reciprocating unit, a working unit, and a power unit. The reciprocating unit includes a main casing surrounding and defining an inner chamber, a rotating member pivotally arranged in the inner chamber and surrounding defining a plurality of slide grooves extending radially, and a plurality of rotating parts respectively housed in the inner chambers. Counterweight in the chute. When the rotating member rotates, each counterweight will reciprocate in the corresponding chute along the radial direction of the rotating member, and when the chute faces downward, the counterweight will drop down to the bottom of the inner chamber .

The working unit includes a tube housing fixed at the bottom of the main housing and surrounding a slot, a detachably inserted receiving member at the bottom of the tube housing and partly located in the slot, A tool head is arranged at the bottom end of the receiving part, and a striking part is located above the receiving part and is movably arranged in the slot. The through groove communicates with the bottom of the inner chamber upwards, and the impact member can be pushed up by the receiving member so that the top end protrudes out of the through groove and enters the inner chamber. The power unit is used to drive the rotating member to rotate.

The effect of the present invention is that: when the tool head is pressed down against the ground or object to be operated, the receiving part connected to the tool head will move up due to the reaction force and resist the impact part, so that the top of the impact part The protrusion protrudes from the slot and is located in the inner chamber. When the power unit is activated, the rotating member will be driven to rotate, so that the direction of the chutes is constantly changing. When one of the chutes faces downward, the corresponding counterweight will go down due to centrifugal force and its own weight Drop and hit the top of the impact piece, the impact piece will hit the receiving piece against it, and finally the tool head can produce a downward hitting action. The sliding grooves are removed, and the maintenance and replacement are very simple, and the present invention does not need to use connecting rods, thereby avoiding the problem that parts are easily broken or damaged.

Referring to Fig. 1, Fig. 2, and Fig. 3, one embodiment of the centrifugal reciprocating transmission tool of the present invention includes a working unit 1, a reciprocating unit 2 arranged above the working unit 1, and a pair of power for the reciprocating unit 2 Unit 3 , a main handle 4 arranged on the power unit 3 , and an auxiliary handle 5 arranged on the reciprocating unit 2 . The working unit 1 includes a tube housing 11 that defines a slot 111 and extends in the vertical direction, a receiving member 12 that is inserted into the bottom of the tube housing 11 and partially extends into the slot 111 , A tool head 13 fixed on the bottom of the receiving part 12, an impact part 14 located above the receiving part 12 and movably arranged in the through groove 111, and a replacement mechanism arranged on the tube housing 11 15. The tube shell 11 is recessed inwardly from the outer peripheral surface to form a plurality of through holes 112 extending in the radial direction. The upper half of the through groove 111 is a circular hole for accommodating a columnar impactor 14, the lower half is a polygonal hole for accommodating a polygonal columnar receiving member 12, and the lower half is connected to the perforations. 112 connected. The receiving member 12 forms a limiting groove 121 facing outwards to the through holes 112 along the circumference.

Referring to Figure 2, Figure 4, and Figure 5, the replacement mechanism 15 has a sleeve 152 set on the tube housing 11 and defines a sleeve 152 surrounding the inner ring groove 151 of the tube housing 11. The balls 153 in the through holes 112 and the spring 154 set on the tube housing 11 with two ends against the tube housing 11 and the sleeve 152 respectively. The sleeve 152 is limited on the tube housing 11 and can be pulled upward relative to the tube housing 11 to move from a fixed position as shown in FIG. 2 to a dismounting position as shown in FIG. 5 . When the sleeve 152 is at the fixed position, the sleeve 152 blocks the balls 153 so that the balls 153 are located in the through holes 112, and each ball 153 has a part protruding inwardly in the limiting groove 121 , so that although the receiving member 12 can slide in the lower half of the through groove 111 , it is limited by the balls 153 so as not to escape from the tube housing 11 . When the sleeve 152 moved up to the dismounting position, the sleeve 152 compressed the spring 154 upwards, and the inner ring groove 151 was aligned with the perforations 112. Now, the receiving member 12 (or let The receiving part 12 falls due to the weight of itself and the tool head 13), the receiving part 12 will push the balls 153 outward, so that the balls 153 enter the inner ring groove 151 (or at least part of them enter the inner ring groove 151). In the inner ring groove 151 ) and no part is located in the limiting groove 121 , so that the receiving member 12 can be directly detached from the tube housing 11 without being blocked. Through the aforementioned operations, the receiving member 12 and the tool head 13 can be quickly replaced, so that the user can quickly replace different accessories such as a branch shovel or a pick according to the operation requirements.

Referring to Fig. 2, Fig. 3, and Fig. 6, the reciprocating unit 2 includes a main housing 21 that defines an inner chamber 211, a main housing 21 that is pivotally arranged in the inner chamber 211 and defines two radially extending The rotating member 22 of the chute 221, and two counterweights 23 accommodated in the chute 221 respectively. The bottom of the main casing 21 is partially inserted into the tube casing 11 , and the bottom of the inner chamber 211 communicates with the slot 111 . The rotating member 22 has a mandrel part 222 with both ends pivoted on the main casing 21, and four frame parts 223 protruding from the mandrel part 222 and cooperating with each other to define the slide grooves 221. . The mandrel portion 222 forms two through-hole-shaped locking holes 224 axially spaced from each other.

Referring back to Figures 1 and 3, the power unit 3 includes a case housing 31 disposed on the main housing 21 and inserted by one end of the mandrel portion 222, a transmission mechanism disposed in the case housing 31 32, and an engine 33 that outputs power to the transmission mechanism 32. The transmission mechanism 32 has a rotating shaft 321 with one end connected to the engine 33 and the other end extending in the case housing 31, a driving gear 322 fixed at one end of the rotating shaft 321 located in the case housing 31, and a fixed A driven gear 323 that extends from one end of the mandrel portion 222 inside the casing 31 and engages with the driving gear 322 . The main handle 4 is disposed on the box housing 31 with an adjustable inclination angle, and the auxiliary handle 5 is disposed on the main housing 21 with an adjustable inclination angle. It should be noted that although the engine 33 is used as the power in this embodiment, a motor or other power sources can also be used to drive the rotating member 22 .

Referring back to Fig. 2, Fig. 3, and Fig. 6, the actuation method of this embodiment is: the user holds the main handle 4 and the auxiliary handle 5, and first presses the tool head 13 against the object to be operated, For example, on branches or stones, when the user exerts force on the present embodiment slightly downwards, the reaction force given by the object to the tool head 13 will cause the receiving part 12 to move upwards along the through groove 111, so that the striking part 14 Pushing upwards along the slot 111 finally makes the top end of the striking member 14 protrude out of the slot 111 to be located at the bottom of the inner chamber 211 . Then start the engine 33 , and the engine 33 will drive the engaged driven gear 323 and the rotating member 22 to rotate after the rotating shaft 321 and the driving gear 322 are rotated. The opening positions of the slide slots 221 will change continuously with the rotation of the rotating member 22, and the counterweights 23 will be subjected to centrifugal force during the rotation. When the opening of one of the chute 221 faces directly downward (that is, towards the through groove 111), the counterweight 23 is no longer restricted by the frame parts 223, so it will be driven along the chute by centrifugal force and its own weight. 221 falls down (as shown by the phantom line in FIG. 2 ), and hits the top of the impact member 14 located in the inner chamber 211 downward. The struck part 14 will hit the receiving part 12 downwards, and finally the tool head 13 will apply an impact to the object to be operated. After the counterweight 23 falls, the rotating part 22 will continue to rotate. The frame part 223 will drive the counterweight 23 to continue to circle, so when the chute 221 rotates from the opening downward to the opening upward, the counterweight 23 will also reset along the chute 221, so the The counterweight 23 will continuously reciprocate to achieve the effect of constantly making the tool head 13 strike the object downwards. When a different tool head 13 is to be replaced, the sleeve 152 can be pulled upwards to the replacement position to pull out the receiving part 12 together with the tool head 13 by manpower or gravity, and replace it with another set of receiving parts. Part 12 and tool head 13 reach the effect of quick disassembly and replacement.

Referring to Fig. 2, Fig. 6, and Fig. 7, the present invention does not need to use the connecting rod and is easy to disassemble. , and two fixing pieces 24 can also be used to pass through one of the counterweights 23 and locked in the locking holes 224, so that the counterweight 23 can be fixed and cannot move, so that the reciprocating unit 2 can only A counterweight 23 is actuated to achieve the effect of adjusting the tapping frequency. Referring to FIGS. 8 to 11 , the quick replacement function of the replacement mechanism 15 allows the user to replace the tool head 13 with different structures and suitable for different operations as shown in FIGS. 8 to 11 according to different situations.

To sum up, the present invention does not need to use connecting rods or cranks and is easy to replace components. The cylindrical counterweights 23 are not prone to stress concentration and are not easily damaged. Users can also quickly replace different structures according to their needs. And the tool head 13 of function, in order to correspond to different operation demands, improve versatility effectively, so can really reach the object of the present invention.

But what is described above is only an embodiment of the present invention, and should not limit the scope of the present invention. All simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the patent specification are still within the scope of the present invention. Within the scope covered by the patent of the present invention.

1: Operating unit 11: Tube shell 111: slotting 112: perforation 12: Accepting parts 121: limit slot 13: Tool head 14: impact piece 15: Replacement mechanism 151: inner ring groove 152: Casing 153: Ball 154: spring 2: Reciprocating unit 21: Main housing 211: inner chamber 22: rotating parts 221: Chute 222: mandrel part 223: Frame Department 224: locking hole 23: Counterweight 24:Fixer 3: Power unit 31: box shell 32: Transmission mechanism 321: rotating shaft 322: Driving gear 323: driven gear 33: engine 4: Main handle 5: Deputy handle

Other features and effects of the present invention will be clearly presented in the implementation manner with reference to the drawings, wherein: Fig. 1 is a perspective view, one embodiment of the centrifugal reciprocating transmission tool of the present invention; Fig. 2 is a front sectional view illustrating a working unit and a reciprocating unit of the present embodiment; Fig. 3 is a side sectional view illustrating one power unit of the present embodiment; Fig. 4 is a three-dimensional exploded view, further illustrating a dismantling mechanism of the working unit; Fig. 5 is a front sectional view illustrating the mode of operation of the replacement mechanism; Fig. 6 is a perspective view illustrating the three-dimensional form of the reciprocating unit; Fig. 7 is a schematic diagram illustrating another usage mode of this embodiment; and 8 to 11 are front views, illustrating that different types of tool heads can be replaced in this embodiment.

1: Operating unit

11: Tube shell

111: slotting

112: perforation

12: Accepting parts

121: limit slot

13: Tool head

14: impact piece

15: Replacement mechanism

151: inner ring groove

152: Casing

153: Ball

2: Reciprocating unit

21: Main shell

211: inner chamber

22: rotating parts

221: Chute

222: mandrel part

223: Frame Department

23: Counterweight

4: Main handle

Claims (8)

A centrifugal reciprocating drive tool comprising: A reciprocating unit, including a main casing surrounding and defining an inner chamber, a rotating member pivotally arranged in the inner chamber and surrounding defining a plurality of slide grooves extending radially, and a plurality of rotating parts respectively housed in the inner chamber When the rotating part rotates, each counterweight will reciprocate in the corresponding chute along the radial direction of the rotating part. When the chute faces downward, the counterweight The block falls down to the bottom of the inner chamber; A working unit, comprising a tube shell fixed at the bottom end of the main shell and surrounding a slot, and a receptacle detachably inserted into the bottom end of the tube shell and partly located in the slot . A tool head arranged at the bottom end of the receiving member, and an impact member located above the accepting member and movably arranged in the through groove, the through groove upwardly communicates with the bottom of the inner chamber, and the impact member can be The receiving part is pushed upward so that the top end protrudes out of the slot and enters the inner chamber; and A power unit is used to drive the rotating member to rotate. The centrifugal reciprocating transmission tool as claimed in claim 1, wherein the working unit further includes a dismantling mechanism arranged on the pipe housing, and the dismantling mechanism can be operated so that the receiving member can be removed from the pipe housing detach. The centrifugal reciprocating transmission tool as claimed in claim 2, wherein, the tube shell of the working unit is recessed inwardly from the outer peripheral surface to form a plurality of radially extending perforations, and the receiving member forms a limit facing the perforations along the circumference. Position slot, the replacement mechanism has a sleeve set on the tube shell and defines a sleeve around the inner ring groove of the tube shell, a plurality of balls respectively placed in the through holes, and a set of The spring on the tube housing and the two ends respectively resist the tube housing and the sleeve. The sleeve can be operated to move from a fixed position to a dismounting position relative to the tube housing. When the sleeve When it is in the fixed position, the bushing blocks the balls so that the balls partially protrude into the limiting groove. When the bushing is in the dismounting position, the bushing compresses the spring, and the inner The ring groove is aligned with the through holes, so that at least part of the balls can enter the inner ring groove. The centrifugal reciprocating transmission tool as claimed in claim 1, wherein the rotating part of the reciprocating unit has a shaft part pivoted on the main housing, and a plurality of protrusions are provided on the shaft part and cooperate with each other A frame portion defining the chutes. The centrifugal reciprocating transmission tool as claimed in claim 4, wherein the shaft portion of the rotating member forms a plurality of locking holes, and the reciprocating unit further includes a plurality of fixing members that pass through at least one counterweight and are locked in the locking holes , the fixing parts make the corresponding weight block fixed in the chute and cannot move. The centrifugal reciprocating transmission tool as claimed in claim 4, wherein the power unit includes a box casing arranged on the main casing, and a transmission mechanism arranged in the box casing and capable of driving the rotating member to rotate , and an engine that outputs power to the transmission mechanism. The centrifugal reciprocating transmission tool as described in claim 6, wherein the transmission mechanism has a rotating shaft with one end connected to the engine and the other end extending in the case housing, a shaft fixed to the rotating shaft located in the case housing A driving gear at one end, and a driven gear fixed at one end of the mandrel portion of the rotating member and meshed with the driving gear. The centrifugal reciprocating transmission tool as described in claim 1, further comprising a main handle arranged on the power unit with an adjustable inclination angle, and an auxiliary handle arranged on the main housing of the reciprocating unit with an adjustable inclination angle .

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