TWM455602U - Hammering mass and hammering set including the same - Google Patents

Description

Hammering block and hammering group containing the hammering block

This creation has a hammering structure for a rotary impact tool.

Most of the conventional rotary impact tools use a pneumatic motor to drive the hammer to rotate. The hammering group has a mechanism for generating impact and impact forces, such as hammering blocks and impact frames, and thus can be outputted from the front end of the hammering group. The rotational power of the impact effect, such as those described in the patents of TWM379496, TWM399005, TWM396741, US 7,510,023 and US 7,147,063, is such a tool.

In the aforementioned tool, the hammering group is inserted into the two sides of the hammering block with two pins, so that the hammering block can swing and limit the swinging range of the hammering block, and the action of the hammering block can be effectively controlled. And get the impact of using the hammer hitting the mandrel to generate the impact force.

In addition to the aforementioned tools, the TWM 412 846 patent provides another impact device in which the latch is only snapped onto one side of the hammer block and the other side is snapped by a projection integrally formed on the peripheral impact frame. It reduces the depth of drilling required for the impact frame, thereby reducing the technical threshold and cost of production.

However, the impact device described in the TWM 412846 patent still has other problems that are not easily overcome in production. The impact frame needs to form a protrusion, and the protrusion is located in the impact space inside the impact frame, and is blocked by other parts of the impact frame, which is difficult to manufacture and manufacture; Furthermore, since the protrusion is directly formed on the impact frame of the impact frame, the position of the protrusion directly limits the assembly direction of the hammer block, so that the two hammer blocks before and after must be assembled in a fixed direction, and cannot be reversed. The direction is assembled, and there is a problem that it is not easy to assemble; and the protrusion is integrally formed in the impact frame design, and the protrusion is still a single plug function. In other words, the hammer block and the protrusion set in the impact frame are still two combinations. The components naturally produce an "assembly gap", which increases the vibration of the hammer block and reduces the transmission efficiency of the pneumatic tool and the service life of the hammer block (or the protrusion).

As shown in Figure 1, US 7,510,023 discloses a hammering set of a rotary impact tool as described above. In US 7,510,023, two pins 33 are received in the hammer frame 31 and each hammer block 32, 32B is pivotally connected to the hammer frame 31. The output shaft 40 is accommodated in the hammering frame 31 and the assembly holes 321 and 321B of the hammer blocks 32 and 32B. The output shaft 40 extends from the through hole 313 of the hammer frame 31.

However, there are still many problems to be solved in the hammering group disclosed in US 7,510,023. Since each of the latches 33 and the hammer blocks 32, 32B are different members (that is, the latches 33 and the hammer blocks 32, 32B are not integrally formed), a gap is formed between the corresponding latch 33 and the hammer blocks 32, 32B. The mating structures of the hammer blocks 32, 32B and the pins 33 are inferior in strength, and the hammers 32, 32B and the pins 33 have serious vibration and wear problems, and the impact torque and transmission efficiency are poor, and the hammer is poor. The service life of the group will be reduced. Furthermore, since the hammer frame 31 is in an open state, if a broken portion is generated (for example, the output shaft 40 or the hammer blocks 32, 32B are broken under long-term use), it may be injected and the operator may be injured. .

As shown in Figures 2 and 3, US 7,147,063 discloses a hammering set of a rotary impact tool as described above. In US 7,147,063, two pins 43 are received in the hammer frame 44 and the hammer blocks 30 are pivotally connected to the hammer frame 44. The shaft body 21 is accommodated in the hammer frame 44 and each hammer The assembly hole 45 of the block 30 extends from the through hole of the hammer frame 44.

However, there are still many problems to be solved in the hammering group disclosed in US 7,147,063. Since each of the latches 43 and the hammer blocks 30 are different members (that is, each of the latches 43 is not integrally formed with each of the hammer blocks 30), a gap is formed between the corresponding latch 43 and the hammer block 30, and the hammer blocks 30 are formed. The mating structure of the pins 43 is inferior in strength, and the vibration and wear problems of the hammer blocks 30 and the pins 43 are serious, the impact torque and the transmission efficiency are poor, and the service life of the hammer group is reduced. Further, since the hammer frame 44 is in an open state, if a broken portion is generated (for example, the shaft body 21 or the hammer block 30 is broken when used for a long time), it may be emitted and the operator may be injured.

The purpose of the present invention is to provide a hammering block and a hammering group comprising the hammering block, which can at least reduce vibration, increase the strength and torque of the mechanism, and increase the transmission efficiency and service life of the hammering group.

Another object of the present invention is to provide a hammering block and a hammering set including the hammering block, which prevents the broken portion from being ejected.

In order to achieve the above object, the present invention provides a hammering block for being provided in a hammering group of an impact type pneumatic tool, the hammering group comprising a rotating portion and a mandrel, the rotating portion surrounding a receiving space and forming a a recessed portion, the spindle is inserted into the accommodating space. The hammer block includes a transmission ring, a first protrusion and a second protrusion. The transmission ring has an inner circumferential surface and an outer circumferential surface. The inner circumferential surface defines a continuous hole, and the through hole defines a through hole. In the axial direction, the first protrusion and the second protrusion are integrally formed with the transmission ring and respectively protrude from the outer circumferential surface, and the second protrusion is located away from the hammer block in the first protrusion On both sides, the first protrusion is parallel to the axial direction. The hammer block is swingably disposed on the rotating portion through the first protrusion, and the hammer block is accommodated in the receiving space And swaying around the first protrusion, the second protrusion is at least partially received in the recess and movable relative to the recess. The through hole is a non-circular hole, and the through hole is provided for the mandrel to intermittently hit the mandrel when the hammer block rotates.

To achieve the above object, the present invention provides a hammering set comprising at least one hammering block as described above, further comprising a rotating portion and a mandrel. The rotating portion is configured to have an accommodating space and is formed with a recessed portion. The hammering block is swingably disposed on the rotating portion and is received in the accommodating space, so that the hammering block can swing around the first protruding portion. The second protrusion is at least partially received in the recess and movable relative to the recess. The mandrel is rotatably disposed in the rotating portion and is inserted into the accommodating space, and the mandrel is disposed through the through hole of the hammer block.

This creation:

1‧‧‧ hammering group

1’‧‧‧ Hammering Group

11‧‧‧ hammering block

11’‧‧‧ hammering block

111‧‧‧Drive ring

111’‧‧‧Drive ring

112‧‧‧First protruding

113‧‧‧through holes

113’‧‧‧Tongkong

114‧‧‧ 坎部

114’‧‧‧Secondary

121‧‧‧Ontology

121’‧‧‧ Ontology

122‧‧‧ Cover

123‧‧‧Retaining wall

124‧‧‧ Groove

124’‧‧‧ recess

125‧‧‧fasteners

126‧‧‧Axis hole

127‧‧‧ ring housing

128‧‧‧ side wall

129‧‧‧Combination

130‧‧‧First combined structure

13‧‧‧Tram

14‧‧‧ mandrel

14’‧‧‧Heart

141‧‧‧Work head

142‧‧‧ convex

2‧‧‧ pneumatic tools

20‧‧‧Rotor

201‧‧‧ shaft

202‧‧‧Second combined structure

Conventional use:

21‧‧‧Shaft body

30‧‧‧ hammering block

31‧‧‧ Hammer box

313‧‧‧through hole

32,32B‧‧‧ hammering block

321,321B‧‧‧Assembled Hole

33‧‧‧Latch

40‧‧‧ Output shaft

43‧‧‧Latch

44‧‧‧ Hammer box

45‧‧‧Assembled holes

Figure 1 is an exploded view of the power tool hammering set disclosed in US 7,510,023.

Figures 2 and 3 are schematic illustrations of the power tool disclosed in US 7,147,063.

Figure 4 is an exploded perspective view of the pneumatic tool of the present invention.

Figure 4A is a perspective view of the hammering set of the present creation.

Figure 5 is a perspective view of the first embodiment of the present creation.

Figure 6 is a cross-sectional view showing the first embodiment of the present creation.

Figure 7 is an exploded perspective view of the first embodiment of the present creation.

Figure 8 is a perspective view of the hammer block of the first embodiment of the present invention.

Figure 9 is a plan view of the hammer block of the first embodiment of the present invention.

Figure 10 is a perspective view of the hammering set of the second embodiment of the present invention.

Figure 11 is a cross-sectional view showing a second embodiment of the present creation.

Figure 12 is an exploded perspective view of a second embodiment of the present creation.

Fig. 12A is a perspective view of Fig. 12 of the present creation.

13 and 14 are schematic views of the hammer block of the second embodiment of the present invention.

The structural features of the present invention and the intended effects thereof will be described below by way of a preferred embodiment, but are not intended to limit the scope of the present invention.

Referring to FIG. 4 and FIG. 5, the present invention provides a hammering group 1 which can be installed in a pneumatic tool 2 or a tool capable of providing rotational power, which is rotated by the pneumatic tool 2 and can be further outputted. Rotating power with impact effect.

Referring to FIGS. 5-7, the hammering set 1 includes two hammering blocks 11, a set of rotating portions, two latches 13 and a mandrel 14.

Referring to FIG. 7 to FIG. 10, the hammer block 11 includes a transmission ring 111 and a first protrusion 112. The transmission ring 111 has an inner circumferential surface and an outer circumferential surface, and the inner circumferential surface defines a constant hole. 113, the through hole 113 is a non-circular hole, and the through hole 113 defines an axial direction, and the outer peripheral surface is formed with a restricting structure such as a ridge portion 114. The first protrusion 112 is extended from the outer peripheral surface, so that the first protrusion 112 and the transmission ring 111 are integrally formed, that is, the first protrusion 112 and the transmission ring 111 are integrally formed as a single member. The first protrusion 112 and the ridge portion 114 are located on two sides away from the hammer block 11. The first protrusion 112 is parallel to the axial direction defined by the through hole 113. Preferably, the first protrusion The length of the 112 in the axial direction is greater than the length of the transmission ring 111 in the axial direction, so that the first protrusions 112 can protrude from the both side surfaces of the transmission ring 111.

Referring to FIG. 5 to FIG. 7 , the rotating portion defines an accommodating space. In more detail, the rotating portion includes a body 121 and a cover 122. The body 121 has a cylindrical shape. The middle enclosure defines an accommodating space, and the inner side of the body can form a symmetrical two sets of retaining walls 123 and a recess 124 located in the middle of the retaining wall for accommodating the two hammer blocks 11 through the opening of the tubular body 121. In the accommodating space, adjacently arranged in the accommodating space, and the first protrusions 112 of the two hammer blocks are respectively abutted in the grooves 124 on both sides, so that the two hammer blocks 11 can be wound around the respective The first protrusion 112 is swung, wherein the two hammer blocks 11 are arranged opposite to each other, that is, the first protrusion of one hammer block abuts against one of the grooves, and the first protrusion of the other hammer block Then, in the preferred embodiment of the present invention, since the first protrusion 112 protrudes from both sides of the transmission ring 111, the first protrusion 112 of the two hammer blocks can be prevented from being abutted during assembly. The first protrusion 112 of each of the hammer blocks is partially accommodated in the ridge portion 114 of the adjacent hammer block; the cover body 122 is attached to the body 121, and is The fasteners 125 are fastened to the cover body 122, and the cover body 122 and the hammer block 11 are prevented from falling outward. The cover body 122 and the body 121 are formed with corresponding shaft holes 126. Shape of the body wall 123, and partially or wholly accommodated in the accommodating space.

The aforementioned latch 13 is matched with the hammer block 11 in two pairs, and is disposed in the groove 124 opposite to the first protrusion 112 of the corresponding hammer block. In other words, as shown in FIG. 6, the first protrusion of the hammer block Abutting against one of the recesses 124, the corresponding latch 13 abuts against the other recess 124, so that the latch 13 is received in the accommodating space, and each latch 13 is received in the dam portion 114 of the hammer block and abuts In the hammering block 11, the shank portion 114 of the hammering block is larger than the latching pin 13, and the dam portion 114 is moved relative to the latching pin 13 when the hammering block 11 is swung.

One end of the mandrel 14 is formed with a working head 141, and the other end is rotatably disposed on the rotating portion and disposed in the accommodating space, and is disposed through the shaft hole 126 of the rotating portion, and the mandrel 14 is disposed through each hammer block. The through hole 113, further, the portion of the mandrel 14 that is formed in each of the through holes 113 is formed with a convex portion 142 corresponding to the shape of the through hole 113, so that the hammer block 11 can be hammered when the hammer block 11 rotates. 11 intermittently hits the mandrel 14 to drive the mandrel to rotate. Since the hammer block 11 is disposed in two opposite directions, the mandrel 14 is also formed with two convex portions 142 in opposite directions.

With the above apparatus, as shown in Fig. 4, the present invention can be assembled in a pneumatic tool 2 or the like for rotation of the rotor 20 of the pneumatic tool. As shown in FIG. 4A, in the embodiment, the body 121 of the rotating portion includes a ring housing 127 and a side wall 128. The side wall 128 is vertically connected to the ring housing 127. The side wall 128 includes a center. A first joint structure 130 is formed on the inner peripheral surface of the joint portion 129. The first joint structure 130 is coupled to a second joint structure 202 of the rotor shaft 201 of the rotor 20, and the first joint structure 130 is coupled to the second joint structure 130. And the shape of the second bonding structure 202 is complementary. In more detail, the first bonding structure 130 includes a plurality of grooves axially alternately formed on the inner circumferential surface of the bonding portion 129. The second bonding structure 202 includes a plurality of axial teeth; however, the first bonding structure 130 The structure of the second bonding structure 202 is not limited thereto, and may be designed as needed. The rotating portion is coupled to the rotor 20 through the combination of the first coupling structure 130 and the second coupling structure 202, such that the rotating portion can be driven by the rotor 20.

The spindle 11 is intermittently impacted by the hammer block 11 during rotation, so that the spindle can further output the rotary power with impact effect by the working head for the user to connect the sleeve or other workpiece for assembling or disassembling the screw. Or drive other workpieces to rotate.

In summary, since the transmission ring 111 and the first protrusion 112 are integrally formed and no gap is formed therebetween, the vibration and wear problems are improved, and the mechanical strength of the hammer block 11 can be improved. The rotating portion can directly transmit the kinetic energy to the transmission ring 111, so that the transmission efficiency and the service life of the hammering group 1 can be increased, and the kinetic energy transmission between the components will be less wasted.

Furthermore, since the transmission ring 111 and the first protrusion 112 are integrally formed, the hammer The punching block 11 can be formed with a large through hole 113, and the size of the mandrel 14 and the convex portion 142 can be correspondingly increased, so that the mandrel 14 can have a large impact radius of impacting the hammer block 11, And the torque and the rotational output power are thus effectively increased.

In addition, since the rotating portion of the hammering group 1 is in a closed configuration, the broken portion in the rotating portion (for example, the broken portion of the mandrel 14 and the hammer block 11 due to long-term use) can be prevented from being emitted. Avoid operator injury.

In addition, when the side wall of the shank portion 114 abuts against the pin 13 , the hammer block 11 is restricted without impacting the body 121 , so that the hammer block 11 and the body 121 can be prevented from being damaged and kinetic energy can be avoided. Waste in the delivery process.

In the above, the rotating portion in the present invention has a cylindrical body 121, and further forms a symmetrical groove 124 and a retaining wall 123 at the rotating portion, which has a relatively simple structural complexity, is easy to manufacture, and at the same time, a hammer for assembly. The block 11 has a first protrusion 112, which does not need to consider the assembly direction of the hammer block when assembled, and has the characteristics of being easy to assemble. When the second hammer block 11 is assembled, the convex first protrusion 112 prevents the two hammer blocks 11 from being assembled in the same direction, and has a function of preventing the assembly error.

In addition, since the first protrusion 112 of the hammering block and the transmission ring 111 are integrally formed in the present creation, the thickness of one side of the hammer block 11 is increased, and the inner circumferential surface can be combined with the structural strength permitting. The through hole 113 is enlarged toward the side of the first protrusion 112, and the material and weight of the hammer block 11 are cut. At this time, since the portion of the material to be cut by the hammer block is located on the side close to the mandrel 14, the hammer is hit. The overall moment of inertia of the group has little effect, and the weight of the hammering group can be reduced under the influence of the impact force to a small extent, and the utility model has excellent use effect.

Secondly, after the through hole in the transmission ring 111 is enlarged, the mandrel 14 and its convex portion 142 The size can also be increased correspondingly, the impact radius of the hammer block 11 and the mandrel 14 can be increased, the transmission efficiency can be improved, and the output of the rotary power can be effectively increased.

Furthermore, since the weight of the hammering group is reduced, the material can be added to other parts of the hammering group so that the added material is located outside the mandrel of the hammering group, and the hammer can be improved under the same weight. The moment of inertia of the group is combined to increase the output of the rotary power.

In addition, since the hammer block has the first protrusion, the hammer block can be directly disposed in the rotating portion, and the gap between the transmission ring and the first protrusion can be removed, thereby reducing vibration and wear between the parts. When the rotating part is rotated, the kinetic energy can be directly transmitted to the hammer block, thereby reducing the power loss transmitted between the parts and the parts, thereby improving the transmission efficiency and the service life.

Summarizing the above embodiments, the present invention provides a hammering group, which has the characteristics of being easy to manufacture and assemble, can prevent the occurrence of misassembly, and at the same time at least reduce vibration, increase the strength and torque of the mechanism, and increase the transmission of the hammering group. It is a proof of efficiency and longevity, and it can prevent the broken part from being shot and hurt the person.

It is to be noted that, in the second embodiment as shown in Figs. 10 to 14, the rotating portion of the hammering group 1' has a body 121' which includes a concave portion 124' formed on the inner surface. Two hammer blocks 11' are disposed in the body 121', and each hammer block 11' includes a second projection 114'. The second projection 114' is integrally projecting from the outer surface of the hammer block 11'. The second projection 114' is movably at least partially received in the recess 124' and movable relative to the recess 124'. In this embodiment, the first protrusion (such as the first protrusion in the first embodiment) and the second protrusion 114' are integrally formed with the transmission ring 111' and respectively from the outer circumference of the transmission ring 111'. The protrusion is extended, and the second protrusion 114' and the first protrusion are located on two sides away from the hammer block 11'. Since the second projection 114' is integrally formed with the hammer block 11', the hammer block 11' can be formed with The larger through hole 113', the size of the mandrel 14' can be correspondingly increased, so the mandrel 14' can have a larger impact radius of the hammer block 11', and the torque and rotational output power are effective In addition, the vibration and wear problems are improved, the strength of the hammer block 11' can be increased, the transmission efficiency and service life of the hammering group 1' are increased, and the kinetic energy transfer between the components will be improved. No waste.

In summary, the overall structural design, practicality and efficiency of this creation are indeed in full compliance with the needs of industrial development, and the disclosed structural creation is also an unprecedented innovative structure, so it has a "novelty" should Undoubtedly, this creation can be more effective than the conventional structure. Therefore, it is also "progressive". It fully complies with the requirements of the application requirements for new patents in the Chinese Patent Law. It is a patent application in accordance with the law, and please The bureau will review it early and give it affirmation.

11’‧‧‧ hammering block

111’‧‧‧Drive ring

113’‧‧‧Tongkong

114’‧‧‧Secondary

121’‧‧‧ Ontology

124’‧‧‧ recess

14’‧‧‧Heart

Claims (8)

A hammering block for being provided in a hammering group of an impact type pneumatic tool, the hammering group comprising a rotating portion and a mandrel, the rotating portion surrounding an accommodating space and forming a recess, the mandrel being inserted in the The accommodating space includes a transmission ring, a first protrusion and a second protrusion. The transmission ring has an inner circumferential surface and an outer circumferential surface, and the inner circumferential surface defines a consistent hole. An axial direction is defined by the through hole, the first protrusion and the second protrusion are integrally formed with the transmission ring and respectively protrude from the outer circumferential surface, and the second protrusion and the first protrusion are located at the And the first protruding portion is parallel to the axial direction; wherein the hammering block is swingably disposed on the rotating portion through the first protruding portion, and the hammering block is accommodated in the rotating portion And the second protrusion is at least partially received in the recess and movable relative to the recess; wherein the through hole is a non-circular hole, the through hole is for the mandrel to be worn It is assumed that the mandrel can be intermittently struck when the hammer block is rotated. The hammer block of claim 1, wherein the length of the first protrusion in the axial direction is greater than the length of the transmission ring in the axial direction. A hammering set comprising at least one hammering block according to claim 1, further comprising: a rotating portion, a housing having a receiving space and a recess formed therein, the hammering block being swingably disposed at the rotating portion and The mandrel is slidably disposed around the first protrusion, and the second protrusion is at least partially received in the recess and movable relative to the recess; a mandrel is rotatably disposed on the The rotating portion is inserted into the accommodating space, and the mandrel is inserted through the through hole of the hammer block. The hammering group of claim 3, wherein the rotating portion comprises a ring housing and a side wall, the side wall being vertically coupled to the ring housing, the side wall comprising a joint having a central hole, the joint portion The inner peripheral surface is formed with a first bonding structure for combining with a second bonding structure of one of the rotor shafts, the first bonding structure being complementary to the shape of the second bonding structure. The hammering set of claim 4, wherein the first bonding structure comprises a plurality of grooves, the grooves are axially spaced apart from an inner circumferential surface of the joint portion, and the second bonding structure comprises a plurality of axial teeth unit. A hammering group comprising at least one hammering block according to claim 2, further comprising: a rotating portion, a housing having a receiving space and a recess formed therein, the hammering block being swingably disposed at the rotating portion and The mandrel is slidably disposed around the first protrusion, and the second protrusion is at least partially received in the recess and movable relative to the recess; a mandrel is rotatably disposed on the The rotating portion is inserted into the accommodating space, and the mandrel is inserted through the through hole of the hammer block. The hammering group of claim 6, wherein the rotating portion comprises a ring housing and a side wall, the side wall is vertically coupled to the ring housing, the side wall comprising a joint having a center hole, the joint portion The inner peripheral surface is formed with a first bonding structure for combining with a second bonding structure of one of the rotor shafts, the first bonding structure being complementary to the shape of the second bonding structure. The hammering set of claim 7, wherein the first bonding structure comprises a plurality of grooves, the grooves are axially spaced apart from an inner circumferential surface of the bonding portion, and the second bonding structure comprises a plurality of axial teeth unit.