TWI385055B - Pneumatic tool impact hammer structure with torque enhancement effect - Google Patents

Description

Pneumatic tool impact hammer structure with torque enhancement effect

The invention relates to an impact hammer structure of a pneumatic tool, in particular to an innovative structure type design of an impact hammer with a torsion enhancement effect.

According to the functional requirements of pneumatic tools, in the case of pneumatic wrenches, it is mainly used for locking or loosening of large nuts and screws. The locking torque required for large screws and nuts is very high. Therefore, the torque required to produce itself is relatively high.

The torque force generated by the pneumatic wrench during operation is usually achieved by a setting of a hammering seat, and the internal portion of the hammering seat is provided with one or two block-shaped hammers. The hammer design is designed to continue to generate an inertial oscillation as the drive shaft rotates and reverses, thereby creating a hammer-type torque-enhancing force.

As mentioned in the previous paragraph, the current torque of the pneumatic wrench is usually determined by the size of the hammer. Due to the larger volume and weight specifications of the hammer, the inertial force generated by the swing is relatively larger; however, Therefore, if it is necessary to achieve a large torque demand, it is necessary to relatively increase the volume of the overall pneumatic wrench to achieve the problems and bottlenecks.

From the user's point of view, the relatively small size of the air wrench, because the process of taking the handle is relatively easy, so the practical convenience is relatively high, so the industry can do without the need to increase the volume of the pneumatic wrench before the conditions, Further enhancement and enhancement of its torsion to enhance performance quality is clearly the need for the industry to reflect on the goals and direction of breakthroughs, and more relevant consumer expectations.

In view of this, the inventor has been engaged in the manufacturing development and design experience of related products for many years. After detailed design and careful evaluation, the inventor has finally obtained the practical invention.

The main object of the present invention is to provide a pneumatic tool impact hammer structure with a torque enhancement effect, and the problem to be solved is to solve the problem of how to develop a more realistic and practical pneumatic tool impact hammer. The technical feature of the present invention is mainly that the impact hammer system comprises: a hammering seat, which is a hollow frame type, including a hammer block accommodating space and one of the opposite side walls of the hammer block accommodating space. a slotted shaft and a shaft through hole; a drive shaft comprising a drive end and a tool end, wherein the drive end is bored by the shaft piercing of the hammer seat and is received in the hammer block accommodation space, and the drive end has a linkage convex a rib, the tool end protrudes to the outside of the shaft piercing of the hammer seat; at least one hammer block is slidably received in the hammer block accommodating space, the hammer block includes a profiled perforation and two oscillating ends The special-shaped perforation is provided for the transmission end of the transmission shaft to be assembled, and the weight of the hammer block is opposite to the two sides and has a concave edge for limiting; the two fixing pins are disposed through the opposite sides of the accommodation space of the hammer block, and Through the limit of the hammer The concave edge is used to limit the swinging state of the hammer block; the mass weighting portion is disposed at the swinging end of the hammer block, and the mass weighting portion is used to increase the quality of the swinging end of the hammer block; thereby, the innovative unique design makes the present invention compare with the prior art In general, the following advantages can be achieved: since the mass accelerating portion can increase the mass of the swinging end of the hammer block without increasing the volume specification of the integral hammer block; the design of the present invention can be performed without amplifying the overall impact hammer volume specification. It effectively enhances the inertial force when the hammer block is swung, and thus achieves the advantages and practical advancement of enhancing the impact hammer torque and instantaneous acceleration.

Please refer to FIG. 1 , which is a preferred embodiment of the impact hammer structure of the pneumatic tool with the torque enhancement effect of the present invention, but the embodiments are for illustrative purposes only and are not limited by the structure in the patent application; The pneumatic tool applied by the impact hammer may be an air wrench, and the impact hammer A includes the following structure: a hammer seat 10 is a hollow frame type, including a hammer block accommodation space 11 and The hammer housing accommodating space 11 has a slotted hole 12 and a shaft through hole 13 opposite to one of the two side walls; a transmission shaft 20 includes a transmission end 21 and a tool end 22 (which can be a quadrangular column type), wherein the transmission The end 21 is bored in the hammer receiving space 11 by the shaft through hole 13 of the hammer seat 10, and the driving end 21 has a linking rib 23, and the tool end 22 protrudes to the hammer seat. The outer shaft of the shaft 10 is used as a portion for locking or loosening the bolt; at least one hammer block 30 (in this embodiment, two sets of configuration types) is a hammer that is slidably received in the hammer seat 10 In the block accommodating space 11, the hammer block 30 includes a profiled through hole 31 and two oscillating ends 32, and the shaped hole 31 is for transmission. The driving end 21 of the shaft 20 is matched by the group, and the hammer block 30 is further provided with a supporting concave edge 33 and a swinging limiting concave edge 33B on opposite sides; the fixing pin 40 is disposed through the hammering seat. The hammer block accommodating space 11 is opposite to the two sides. If a hammer block 30 is used, one of the fixing pins 40 passes through the supporting recess 33 provided by the hammer block 30, and the other fixing pin 40 passes through. The hammer block 30 is provided with a swing limit concave edge 33B; the mass weighting portion 50 is disposed at the swing end 32 of the hammer block 30, and the mass weighting portion 50 can increase the quality of the swing end 32 of the hammer block 30; The above-mentioned structural design makes it possible to increase the inertial force of the hammer 30 when the hammer 30 is swung by the mass accumulating portion 50, so as to enhance the torque and instantaneous acceleration of the impact hammer A, but the overall impact hammer volume does not need to be expanded.

As shown in the second and third embodiments, the impact hammer A is applied to the pneumatic tool structure. The pneumatic tool of the embodiment is an air wrench 60, and the impact hammer A is accommodated in the pneumatic device. The one end of the main body 61 of the wrench 60 is fixed by an end cover 63. The end cover 63 is provided with a through opening 64 for the tool end 22 of the drive shaft 20 of the impact hammer A to be worn. Out (as shown in FIG. 3), the actuating groove 62 is provided with a driving bolt shaft (not shown) which can be engaged with the slotted hole 12 of the hammering seat 10, thereby enabling the driving Impact hammer A rotates.

The specific embodiment of the mass accelerating portion 50 can be a bump type formed by integrally protruding from the swing end 32 of the hammer block 30 as shown in FIG. 4 .

In addition, the mass accretion portion 50B as disclosed in FIG. 5 is formed in a form of being separately formed and then locked (for example, by bolts 70) or combined (such as welded) to be positioned at the swing end 32 of the hammer block 30.

The weight accelerating portion 50C as shown in FIG. 6 is a material body which is heavier in mass with respect to the hammer block 30, so that the swinging end 32 of the hammer block 30 is provided with a recessed portion 34 for The mass emphasis portion 50C is embedded or embedded in the locator.

In addition, the mass emphasis portion 50 may be a structural type disposed at one of the swing ends 32 of the hammer block 30 (as shown in FIG. 4); or a mass emphasis portion 50 as shown in FIG. It is a structural type that has two swing ends 32. As for the mass accelerating portion 50, it should be provided at one of the swinging end 32 or the second swinging end 32, which is determined according to the inertial reinforcing effect that the industry desires to achieve, and thus has no limitation.

As shown in Fig. 8, when the hammer blocks 30, 30B are in a plurality of setting modes, the mass weighting portions 50 of the different hammer blocks 30, 30B are in a balanced symmetrical setting mode according to the demand for rotation. A preferred embodiment; as shown in the figure, the two different hammer blocks 30, 30B are equally provided with two different masses 50, 50B of different volumes, thereby forming the hammer blocks 30, 30B. The effect of the difference in the inertial force between the positive and negative directions is different, but the mass weighting portion 50 and the mass weighting portion 50B of the second hammer block 30, 30B are opposite to each other (ie, diagonally arranged) must be balanced and symmetrically set. Type to facilitate balance and stability in operation.

Moreover, when the hammer blocks 30, 30B are provided in plural, the mass weighting portions 50, 50B provided by the different swinging ends 32 of the hammer blocks 30, 30B can be in different quality setting modes (such as Fig. 8). And disclosed, and can be configured to be combined with the weighting requirement of the positive and negative directions, and the positive force and the reverse rotation direction provide a difference in the inertial force promoting effect according to the configuration combination. .

Advantages of the invention:

The "pneumatic tool impact hammer structure with torque enhancement effect" disclosed in the present invention mainly provides an innovative and unique design of the mass weighting portion by the swinging end of the hammer of the impact hammer, so that the present invention is related to the prior art. Structurally, since the mass emphasis portion can increase the mass of the swing end of the hammer block without increasing the volume specification of the integral hammer block; the design of the present invention can effectively enhance the hammer without expanding the overall impact hammer volume specification. The inertial force of the block swinging, thereby achieving the advantages and practical advancement of enhancing the impact hammer torque and instantaneous acceleration.

In addition, taking the pneumatic wrench products disclosed in Figures 2 and 3 as an example, if the output torque of the conventional pneumatic wrench of the same specification is 350 lb-lbs, then the output torque after the design of the present invention is adopted. It will increase by about 100 lb-lbs to reach 450 lb-lbs; in addition, the instantaneous acceleration required to reach the predetermined torque can be shortened from 5 seconds to 3 seconds, which is the initial test result of the inventor. I am hereby for reference.

The above embodiments are intended to be illustrative of the present invention, and are not to be construed as limiting the scope of the invention. The principles are changed and modified to achieve an equivalent purpose, and such changes and modifications are to be included in the scope defined by the scope of the patent application as described later.

A. . . Impact hammer

10. . . Hammering seat

11. . . Hammer block accommodation space

12. . . Bolt hole

13. . . Shaft perforation

20. . . transmission shaft

twenty one. . . Drive end

twenty two. . . Tool side

twenty three. . . Linked rib

30, 30B. . . Hammer block

31. . . Shaped perforation

32. . . Swing end

33. . . Supporting concave edge

33B. . . Swing limit concave edge

34. . . Concave portion

40. . . Fixed pin

50, 50B, 50C. . . Quality increase department

60. . . Pneumatic wrench

61. . . Ontology

62. . . Actuating slot

63. . . End cap

64. . . Wear mouth

70. . . bolt

Fig. 1 is an exploded perspective view of a preferred embodiment of the impact hammer structure of the present invention.

Fig. 2 is an exploded perspective view of the impact hammer of the present invention applied to a pneumatic tool.

Fig. 3 is a perspective view showing the combination of the impact hammer of the present invention applied to a pneumatic tool.

Fig. 4 is a view showing an embodiment in which the mass emphasis portion of the present invention is integrally formed into a convex shape.

Fig. 5 is a view showing an embodiment of the mass-weighting portion of the present invention in a lock type.

Fig. 6 is a view showing an embodiment in which the mass emphasis portion of the present invention is a heavier material body embedded type.

Fig. 7 is a view showing an embodiment in which the mass emphasis portion of the present invention is provided with two swing ends.

Fig. 8 is a view showing an embodiment in which the mass emphasis portion of the present invention is a two-swing end difference setting type.

A. . . Impact hammer

10. . . Hammering seat

11. . . Hammer block accommodation space

12. . . Bolt hole

13. . . Shaft perforation

20. . . transmission shaft

twenty one. . . Drive end

twenty two. . . Tool side

twenty three. . . Linked rib

30. . . Hammer block

31. . . Shaped perforation

32. . . Swing end

33. . . Supporting concave edge

33B. . . Swing limit concave edge

40. . . Fixed pin

50. . . Quality increase department

Claims (8)

The utility model relates to a pneumatic tool impact hammer structure with a torsion enhancement effect, the impact hammer comprises: a hammering seat, which is a hollow frame type, comprising a hammer block accommodating space and is arranged on the opposite side walls of the hammer block accommodating space. a pin slot and a shaft through hole; a drive shaft, comprising a drive end and a tool end, wherein the drive end is received by the shaft piercing of the hammer seat and is received in the hammer block receiving space, and the The driving end has a linkage rib, and the tool end protrudes to the outside of the shaft hole of the hammer seat; at least one hammer block is slidably received in the hammer block accommodating space of the hammer seat, The hammer block includes a special-shaped perforation and two oscillating ends, the special-shaped perforation is for the transmission end of the transmission shaft to be assembled, and the hammer block is provided with a support concave edge and a swing limit concave edge on opposite sides; a plurality of fixing pins are respectively disposed at opposite sides of the hammer block accommodating space of the hammer block, and the two fixing pins respectively pass through the support concave edge and the swing limit concave edge of the hammer block to limit the hammer The pivot point of the block is swung; the mass is added to the pendulum End, the mass weighting portion is used to increase the mass of the swinging end of the hammer block; thereby, the inertia force of the hammer block can be increased, and the torque of the impact hammer and the instantaneous acceleration can be enhanced, but the overall impact hammer volume does not need to be expanded. purpose. A pneumatic tool impact hammer structure having a torsion-enhancing effect according to the first aspect of the invention, wherein the mass weighting portion is a bump type formed by integrally projecting a swing end of the hammer block. The pneumatic tool impact hammer structure according to claim 1, wherein the mass weighting portion is formed separately and then combined or locked to be positioned at the swing end of the hammer block. A pneumatic tool impact hammer structure having a torsion-enhancing effect according to claim 1 or 3, wherein the mass weighting portion is a material body that is heavier in mass with respect to the hammer block. A pneumatic tool impact hammer structure having a torsion-enhancing effect according to claim 1 or 3, wherein the swinging end of the hammer block is provided with a recessed portion for the mass emphasis portion to be embedded or embedded in the positioner. A pneumatic tool impact hammer structure having a torsion-enhancing effect according to claim 1, 2 or 3, wherein the mass weighting portion is provided at one of the swinging end or the second swinging end of the hammer block Set the structure type. According to the pneumatic tool impact hammer structure with the torsion enhancement effect described in claim 1, wherein when the hammer block is plural, the mass weight of the different hammer mass is balanced symmetrically according to the use demand system. Set the type. A pneumatic tool impact hammer structure having a torsion-enhancing effect according to the first aspect of the patent application, wherein when the hammer block is provided in plural, the mass weighting portion provided at each of the different swing ends of the hammer block can be a phase The different mass setting type, and the combination of positive and negative rotation to increase the demand, and the positive and negative rotation directions provide different inertial force enhancement effects according to the configuration combination.