TWI626115B - Pneumatic grinder with improved grip structure - Google Patents

Abstract

The utility model relates to a pneumatic grinding machine with a modified structure, which mainly solves the problem that the holding posture caused by the raising of the wrist is not ergonomic, and the structure is lower than the front part when the pressing handle is pressed down to the bottom, and The rear portion and the tail portion of the cover body are substantially flush, and a depressed portion is formed above the bent portion of the pressing handle, the rear portion and the tail portion of the cover body with respect to the height of the front portion, and the hand is held by the hand and is large When the small fish rests on the cover body, the position of the lower trap portion for the bottom end of the wrist can be significantly lower than the top end of the head, and the wrist can be moved downward at the position when the wrist is held, thereby constituting the present invention.

Description

Pneumatic grinder with improved grip structure

The present invention relates to a pneumatic grinder, and more particularly to a tool driven by a high pressure gas and capable of grinding or polishing a workpiece in combination with a grinder.

As shown in Fig. 7, as a conventional pneumatic grinder, a body 81 is mounted at the bottom for a grinder (such as a grinding wheel or a polishing wheel), and a head 82 is provided at the top of the body 81, and a valve seat 83 is at the head. One side of the portion 82 is extended, the valve seat 83 can be provided with a joint 84 for intake and exhaust, and the valve seat 83 is provided with a switch 85. A press handle 86 is pivotally connected to the valve seat 83 at one end, and the pressure handle 86 The length extends across the switch 85 to the other end and extends above the head 82.

When grinding, the head 82 is usually held by fingers, and the large and small fish of the palm are pressed against the pressing handle 86 on the valve seat 83, so as to press the pressing handle 86 to activate the switch 85, and the pressing machine can be pressed. The body 81 is moved and ground. However, since the pressing handle 86 is a straight shank, it is horizontal when pressed by the hand, and the horizontal pressing handle 86 is approximately equal to the top end of the head 82. At this time, the large and small fish are pressed on the pressing handle 86. The height is raised, causing the wrist to be lifted above the top of the head 82. This is not in an ergonomic posture. Under prolonged use, it is prone to acid, pain and discomfort.

As shown in FIG. 8, the main difference between the pneumatic grinder and the pneumatic grinder is that the head 92 of the top of the body 91 is provided with a cover 94 on the laterally extending valve seat 93. The top surface of the cover 94 is slightly inclined rearwardly away from the head 92, and the pressing handle 96 is also a straight shank. When grinding, the head 92 is also held by fingers, but the large and small fish in the palm are in the valve. The seat 93 is held against the cover 94 to press the handle 96 to activate the switch 95 for grinding. Although the top surface of the cover 94 is slightly inclined rearward and the pressing handle 96 is also tilted when pressed, the difference between the degree of tilting and the height of the tip end of the head 92 is not significant, particularly in the head 92 and the valve seat. There is no obvious height difference at the junction of 93. During operation, the large and small fish are still raised on the cover 94, and the bottom side of the wrist is still raised to a height higher than the top of the head 92. It is not ergonomic, and it is prone to prolonged use of acid and pain.

Therefore, how to solve the problem of the aforementioned pneumatic grinder is the main focus of the present invention.

The main object of the present invention is to solve the above problems and provide a pneumatic grinder having a grip improving structure. When the pressing handle is pressed down to the bottom, the rear portion has a lower structure than the front portion when the bending portion is bent. And with respect to the height of the front section, a depressed area is formed above the bent portion of the pressing handle, the rear portion and the tail portion of the cover body, and when the finger grips the head of the body, the large and small fish of the palm are in the depressed area. Relying on the rear section of the pressing handle and the cover body, the position of the bottom side of the wrist is significantly lower than the top end of the head, and the above posture is not ergonomically solved, so that it is difficult to make the hand feel sour under long-term use. The effect of discomfort such as pain.

For the purpose of the foregoing, the present invention comprises: a pneumatic grinder having a passage for intake and exhaust in a body, driving a pneumatic motor to drive a high-pressure gas, thereby driving a grinding machine installed at the bottom of the body. Actuator, the body has a head at the top thereof, a valve seat extends from one side of the body, the valve seat is provided with a joint for the intake air, and the valve seat is provided to control the rotation of the air motor a switch, a pressing handle is pivotally connected to the valve seat at one end, the length of the pressing handle extends across the switch to the other end and extends above the head, and a cover body is pivotally connected to the head or the valve seat The cover is turned over relative to the valve seat The body has a side portion on the opposite sides of the pressing handle on the valve seat, and has a tail portion which is covered in the extending direction of the valve seat to the joint, wherein when the pressing handle is pressed down to the bottom, the body The portion of the pressing handle above the head is a front section, and the portion above the valve seat is a rear section, and the front section and the rear section are a bending section, and the bending section is bent from the front section to the front section The rear section engages the tail portion and is substantially flush, and forms a depression area above the bending section, the rear section and the tail portion with respect to the height of the front section, and the hand is held by the depression area The part allows the large and small fish to move down and rest on the cover.

Wherein, the bending section is inclined, and at the side of the side of the bending section, when the pressing handle is pressed down to the bottom, there is an engaging portion which is tilted along the inclined section.

Wherein, the inclined section is curved and curved.

Wherein, the cover body comprises a front cover and a rear cover, the side part is at the front cover, and the tail part is at the rear cover, and the cover system is pivotally connected to the top surface of the valve seat. The valve seat can be turned over with respect to the valve seat, and the front cover is detachably covered on the valve seat.

Wherein, at the opposite ends of the rear cover, a blocking portion is protruded from the opposite side of the cover, and the blocking portion has a stop portion at the valve seat when the rear cover covers the valve seat. The side edge of one end of the head.

Wherein, the pressing handle and the rear cover are pivotally connected to the valve seat on the top surface by a shaft member, and the valve seat has a pair of ears at each pivotal portion of the shaft member, and each pair The ear portion has a shaft hole through which the corresponding shaft member is coaxially pierced, and the valve seat has a groove portion on the top surface thereof for the shaft hole of each pair of ears to be further deviated with respect to the top surface.

An inner ring for the joint is embedded in the valve seat under the pivotal joint of the rear cover, and the pressure handle is pivotally connected to the valve between the inner ring and the switch. And the ear portion and the groove portion corresponding to the shaft member corresponding to the pressing handle are also between the inner ring and the aforementioned switch.

Wherein, the cover body is integrally formed, and the side portion and the tail portion are followed by a single-piece structure, and the cover body is pivotally connected to the head portion at one end of the side portion, and can be turned over with respect to the valve seat.

Wherein, the rear section is lower than the front section by a height of 10 mm.

Wherein, the pressing handle has an opening in the bending section thereof, a safety switch is centrally disposed on the pressing handle in the opening, and the safety switch is supported by a return spring, and the pressing handle is not pressed down and upturned Normally, the bottom end of the valve seat is abutted against the bottom end of the valve seat, and the safety switch has a pulling portion exposed on the pressing handle, and the pulling portion is directed toward the opening. When the direction is pushed, the bottom end is moved away from the top surface of the top surface, and the pressing handle is pressed downward.

The above and other objects and advantages of the present invention will be readily understood from

Of course, the invention may be varied on certain components, or in the arrangement of the components, but the selected embodiments are described in detail in the specification and their construction is shown in the drawings.

(customized part)

81‧‧‧ body

82‧‧‧ head

83‧‧‧ valve seat

84‧‧‧Connectors

85‧‧‧ switch

86‧‧‧pressure handle

91‧‧‧ body

92‧‧‧ head

93‧‧‧ valve seat

94‧‧‧ cover

95‧‧‧ switch

96‧‧‧pressure handle

L‧‧‧ baseline

(part of the invention)

1‧‧‧ body

11‧‧‧ channel

12‧‧‧ head

13‧‧‧ valve seat

131‧‧‧ top surface

132‧‧‧ Ears

133‧‧‧Axis hole

134‧‧‧Ditch

135‧‧ Ears

136‧‧‧ shaft hole

137‧‧‧Ditch

138‧‧‧ Inner Ring

14‧‧‧Connectors

15‧‧‧ switch

2‧‧‧Air motor

3‧‧‧pressure handle

31‧‧‧ front section

32‧‧‧After

33‧‧‧Bend section

34‧‧‧ shaft parts

35‧‧‧Opening

36‧‧‧Safety switch

361‧‧‧ bottom

362‧‧‧Moving part

4‧‧‧ cover

41‧‧‧ side

411‧‧‧Connecting Department

42‧‧‧ tail

43‧‧‧ front cover

44‧‧‧Back cover

441‧‧‧ shaft parts

45‧‧ ‧ blocking

451‧‧‧ side edge

5‧‧‧ Grinder

4A‧‧‧ cover

41A‧‧‧ side

42A‧‧‧ tail

A‧‧‧ depressed area

L‧‧‧ baseline

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a preferred embodiment of a pneumatic grinder of the present invention.

Fig. 2 is an exploded perspective view of the pneumatic grinder of Fig. 1.

Figure 3 is a cross-sectional structural view of the pneumatic grinder of Figure 1.

Fig. 4 is a schematic view showing the state in which the pneumatic grinder of Fig. 1 is held by hand during operation.

Figure 5 is a perspective view of another embodiment of the pneumatic grinder of the present invention.

Fig. 6 is a schematic view showing the state in which the pneumatic grinder of Fig. 5 is held by hand during operation.

Fig. 7 is a schematic view showing a state in which a conventional pneumatic grinder is held by a hand during operation.

Figure 8 is a schematic view showing another state in which the conventional pneumatic grinder is held by hand during operation.

Referring to Figures 1 through 6, the structure of the embodiment selected for use in the present invention is for illustrative purposes only and is not limited by such structure in the patent application.

The present invention provides a pneumatic grinder having a grip improving structure, as shown in Figures 1 to 3, which is a preferred embodiment of the present invention, including a body 1, a pneumatic motor 2, a press handle 3, and a cover 4, wherein: the body 1 shown in Figures 2 to 3 has a passage 11 for intake and exhaust therein, and the passage 11 is driven by a high-pressure gas to drive the air motor 2 to rotate, thereby driving the bottom of the body 1 to be installed. The grinder 5 is actuated, and the grinder 5 used in the embodiment is a polishing wheel, or may be a grinding wheel. The body 1 has a head 12 at its top, a valve seat 13 projects from one side of the body 1, a valve seat 13 is provided with a joint 14 for the intake air, and a valve seat 13 is provided for controlling the rotation of the air motor 2. Switch 15. The pressing handle 3 is pivotally connected to the valve seat 13 at one end, and the length of the pressing handle 3 crosses the switch 15, and the pressing handle 3 is extended at the other end above the head 12.

The cover body of the present invention is pivotally connected to the head 12 or the valve seat 13 and can be turned over with respect to the valve seat 13. As shown in Figures 1 to 4, in the preferred embodiment, the cover 4 has a side portion 41 and a tail portion 42. The side portion 41 covers the opposite sides of the pressing handle 3 on the valve seat 13, and the tail portion is along the valve. The extension of the seat 13 is attached to the joint 14, and the cover 4 in this embodiment is pivotally mounted on the valve seat 13. Thereby, the operator can hold the head 12 by hand, and at the same time press the pressing handle 3 down to the touch switch 15, that is, the high-pressure gas can be driven to drive the air motor 2 to rotate, and the grinder 5 is actuated to perform the workpiece. Grinding or polishing action (not shown).

As shown in FIGS. 2 to 4, when the pressing handle 3 is pressed down to the bottom, the portion of the pressing handle 3 above the head portion 12 is a front portion 31, and the portion above the valve seat 13 is a rear portion 32. Between the front section 31 and the rear section 32 is a bending section 33, and the bending section 33 is bent from the front section 31 from the high to the low section to the rear section 32, and the rear section 32 engages the tail portion 42 and is substantially flush, and forms a depression area A above the bending section 33, the rear section 32 and the tail section 42 with respect to the height of the front section 31 (as shown in FIG. 4). When the following trap A is used to hold the head 12, the large and small fish can be moved down and rested on the cover body 4. At this time, the following trap area A is provided for the bottom side of the wrist to be significantly lower than the head. The top of the 12th. The top end of the head portion 12, where the front portion 31 is pressed down to the bottom of the pressing handle 3, may be hidden in the portion where the head portion 12 is exposed, that is, if the front portion 31 of the pressing handle 3 is pressed down to the bottom. The head 12, either slightly above the head 12 and exposed slightly above the head 12, is still considered to be the top end of the head 12 in the present invention.

As shown in Figs. 2 to 4, in the pressing shank 3 of the preferred embodiment, the bent portion 33 is inclined. When the pressing handle 3 is pressed down to the bottom as described above, the side portion 41 is formed with an engaging portion 411 which is tilted up along the inclined portion 33. In this case, the inclined portion 33 is curved and curved, so that the engaging portion 411 is also tilted with the curved portion 33 bent in a curved shape, but in different embodiments, the bent portion 33 can be non-tilted. For example, the bent section is bent between the front section 31 and the rear section 32 at a nearly right angle. Further, in the present embodiment, the pressing shank 3 has a rear portion 32 which is lower than the front portion 31 by a height of 10 mm.

As shown in FIGS. 2 to 4, in the preferred embodiment, the cover 4 includes a front cover 43 and a rear cover 44. The front cover 43 and the rear cover 44 are separated, and the side portion 41 is located at the front cover 43. And the tail 42 is at the back cover 44. The cover body 4 is pivotally connected to the top surface 131 of the valve seat 13, so that the cover body 4 can be turned over with respect to the valve seat 13, and the front cover 43 is covered on the valve seat 13, and the front cover 43 It can be detached from the valve seat 13. The cover body 4 is disposed in the pneumatic grinder, mainly when covering the valve seat 13, and is covered by the tail portion 42 in the extending direction of the valve seat 13 to the joint 14, and can be connected to the joint outside the valve seat 13. 14 has a function of shielding, and the extension of the tail portion 42 allows the operator's hand to be gripped on the valve seat 13, and the joint 14 has an anchoring effect.

The tail portion 42 of the rear cover 44 has a blocking portion 45 extending toward the cover 14 on the opposite sides. The blocking portion 45 has a side edge 451, and the rear cover 44 covers the valve seat. At 1300, the side edge 451 abuts against one end of the valve seat 13 away from the head 12.

In the preferred embodiment, the pressing handle 3 is pivotally connected to the valve seat 13 by the shaft member 34 at the top surface 131. The valve seat 13 has a pair of ears 132 at the pivotal joint of the shaft member 34. 132 has a shaft hole 133 through which the shaft member 34 is coaxially passed. The valve seat 13 has a groove portion 134 on the top surface 131 thereof. The groove portion 134 allows the shaft hole 133 of the ear portion 132 to be further deflected downward relative to the top surface 131; the rear cover 44 The top surface 131 is pivotally connected to the valve seat 13 by the shaft member 441. The valve seat 13 has a pair of ears 135 at the pivotal joint of the shaft member 441. The pair of ears 135 have a shaft through which the shaft member 441 is coaxially passed. The hole 136, the valve seat 13 has a groove portion 137 on the top surface 131 thereof, whereby the groove portion 137 causes the shaft hole 136 of the ear portion 135 to be further deflected downward relative to the top surface 131.

In the valve seat 13 of the preferred embodiment, an inner ring 138 is embedded under the pivotal portion of the rear cover 44, whereby the inner ring 138 is sleeved for the joint 14 to be assembled. The pressing handle 3 is pivotally connected to the valve seat 13 between the inner ring 138 and the switch 15 at the top surface 131. The ear portion 132 and the groove portion 134 of the corresponding shaft member 34 are also between the inner ring 138 and the switch 15. .

As shown in Figures 2 to 4, the pressing handle 3 has an opening 35 in its bent portion 33. A safety switch 36 is pivotally disposed in the opening 35 to the pressing handle 3, and the safety switch 36 is subjected to a return spring (not shown) When the pressing handle 3 is not pressed down and upturned, the bottom end 361 of the valve seat 13 is normally held by the bottom end 361 located below the pressing handle 3, and the safety switch 36 has a pressing handle 3 When the protruding portion 362 is pushed and the pulling portion 362 is pushed toward the opening 35, the bottom end 351 is separated from the top surface 131, and the pressing handle 3 is pressed downward.

As shown in the fifth to sixth embodiments, the cover body 4A according to another embodiment of the present invention has the same side portion 41A and a tail portion 42A as the cover body 4 described above, but the main difference is that this implementation The cover body 4A is integrally formed, and the side portion 41A and the tail portion 42A are in a single-piece structure. In the embodiment, the cover body 4A is pivotally connected to the head portion 12 at one end of the side portion 41A. The valve seat 13 is turned over, whereby the same effect as the cover 4 of the foregoing embodiment can be achieved.

A conventional pneumatic grinder as shown in Fig. 7 also draws a horizontal reference line L at the height of the top end of the head 82. When the hand 82 of the body 81 is held by hand, the bottom side of the wrist is noticeable. Above the reference line L; as shown in the other figure 8, the height of the top end of the head 92 is also drawn with the same horizontal reference line L. When the hand 92 of the body 91 is held by hand, the bottom side of the wrist is slightly lower. In the reference line L; as shown in Figures 4 and 6, the pneumatic grinder of the present invention has the same level of reference line L at the height of the top end of the head 12, when the hand 12 of the body 1 is held by hand. It can be seen that the bottom side of the wrist is lower than the reference line L. It should be noted that the hands indicated by the imaginary lines in Figures 4, 6, 7, and 8 are drawn corresponding to the case where the physical objects of the present invention and the conventional pneumatic grinder are actually held by the same hand, not by computer. The drawing method is simply adjusted to the position on the drawing.

According to the above, in comparison with the distance between the wrist and the corresponding reference line in the foregoing figures, the bottom side of the wrist shown in FIG. 7 is significantly higher than the top end of the head 82 of the body 81, so that the wrist is obviously In the case of elevation; the bottom side of the wrist in Figure 8 is slightly lower than the hand in Figure 7, but still higher than the top of the head 92 of the body 91, so the degree of the wrist movement is not obvious; 6 shows that the pneumatic grinder of the present invention has the most obvious degree of lowering the bottom side of the wrist than the reference line L because of the depressed area A, so that the bottom side of the wrist is significantly lower than the top end of the head 12, thus having A technical effect that allows the wrist to move down significantly.

It is not difficult to find from the above description that the advantage of the present invention is that when the operator uses the pneumatic grinder of the present invention, the hand 12 of the body 1 is held by the hand while the hand presses the pressing handle 3 at the pressing handle 3 When pressed down to the bottom, the rear section 32 is bent along with the bending section 33, so that the rear section 32 has a lower structure than the front section 31, and relative to the height of the front section 31, in the bending section 33 and the rear section 32 of the pressing handle 3. The depressed portion A is formed above the tail portion 42 of the cover body 4, so that when the finger grips the head portion 12 of the body 1, the large and small fishes of the palm are in the depressed portion A against the rear portion 32 and the cover of the pressing handle 3. The body 4 (including the side portion 41 and the tail portion 42), relative to a conventional pneumatic grinder, can position the bottom side of the wrist significantly below the top end of the head 12 to solve the ergonomic problem of the posture. Therefore, under the pneumatic grinder of the present invention for a long period of time, the hand held by the head 12 does not have an easy discomfort such as acid or pain.

The above description of the embodiments is intended to be illustrative of the invention and is not intended to limit the scope of the invention.

From the above detailed description, it will be apparent to those skilled in the art that the present invention can achieve the foregoing objects and is in accordance with the provisions of the Patent Law.

Claims (7)

The utility model relates to a pneumatic grinding machine with a modified structure, which has a passage for intake and exhaust in a body, drives a pneumatic motor to rotate by introducing high-pressure gas, and drives a grinder mounted on the bottom of the body to act, the body And having a head at a top thereof, a valve seat extending from a side of the body, the valve seat is provided with a joint for the air intake, and the valve seat is provided with a switch for controlling the rotation of the air motor, a pressure The handle is pivotally connected to the valve seat at one end, the length of the pressure handle extends across the switch to the other end and extends above the head, and a cover is pivotally connected to the valve seat to be turned over with respect to the valve seat, the cover The body has a side portion on the opposite sides of the pressing handle on the valve seat, and has a tail portion which is covered in the extending direction of the valve seat to the joint, wherein when the pressing handle is pressed down to the bottom, the body The portion of the pressing handle above the head is a front section, and the portion above the valve seat is a rear section, and the front section and the rear section are a bending section, and the bending section is bent from the front section to the front section In the rear section, the rear section engages the tail portion and is substantially flush and opposite to the front a height forming a depression area above the bending section, the rear section and the tail portion, and the hand holding the head in the depression area allows the large and small fish to move down and rest on the cover body, The bending portion is inclined, and when the pressing handle is pressed down to the bottom, the side portion is formed with an engaging portion which is inclined along the inclined portion of the bending portion, and the cover body comprises a separating front cover and a rear cover, the side portion is at the front cover, and the tail portion is at the rear cover. The cover system is pivotally connected to the top surface of the valve seat to be versatile with respect to the valve seat, and the front cover The cover is placed over the valve seat. A pneumatic grinder having a grip improving structure according to claim 1, wherein the bent portion is curved in a curved shape. A pneumatic grinder having a grip-improving structure according to claim 1, wherein a stopper is formed on the opposite sides of the rear cover on opposite sides of the cover, and the stopper has a The back cover abuts against the side edge of the valve seat away from one end of the head when the valve seat is seated. A pneumatic grinder having a grip improving structure according to claim 1, wherein the pressing handle and the rear cover are pivotally connected to the valve seat on the top surface by a shaft member, the valve seat being Each of the pivotal portions of the shaft member has a pair of ear portions, and each pair of the ear portions has a shaft hole through which the corresponding shaft member is coaxially passed. The valve seat has a shaft hole on the top surface of the pair of ears corresponding to the shaft hole The top surface is further down the ditch. A pneumatic grinder having a grip improving structure according to claim 4, wherein an inner ring for the joint is embedded in the valve seat below the pivotal joint of the rear cover, and the press handle is The top surface is pivotally connected to the valve seat between the inner ring and the switch, and the ear portion and the groove portion corresponding to the shaft member corresponding to the pressing handle are also between the inner ring and the switch. A pneumatic grinder having a grip improving structure according to claim 1, wherein the rear section is lower than the front section by a height of 10 mm. A pneumatic grinder having a grip improving structure according to claim 1, wherein the pressing handle has an opening in a bent portion thereof, a safety switch is disposed in the pressing hole in the pressing handle, and the safety switch is a return spring struts, and when the shank is not depressed and upturned, the normal state abuts the valve at a bottom end below the shank a top surface of the seat, and the safety switch has a pulling portion exposed on the pressing handle, and when the pulling portion is pushed toward the opening, the bottom end is interlocked to abut the top surface, Let the pressure handle be pressed below.