TWM616958U - Impact cylinder mechanism of pneumatic machine tool - Google Patents

Abstract

An impact cylinder mechanism of a pneumatic machine tool includes a cylinder body and two limit stoppers inserted in the cylinder body. The cylinder has a surrounding wall, and an end wall that cooperates with the surrounding wall to define a cylinder groove. The end wall has an inner end surface and an outer end surface opposite to each other. The inner end surface is recessed with a mounting groove coaxially communicating with the barrel groove and used for the cam seat to be set, and has a peripheral edge defining the mounting groove and used to hold a bead Limited to the limiting face in the ring groove of the cam seat. The limit stoppers are partially convexly exposed on the limit face, and can be used to block the rolling displacement of the ball. Through the structural design of the cylinder body and the limit stoppers of the impact cylinder mechanism, the punching and forging process in the manufacture of the existing impact cylinder mechanism can be completely eliminated, and the manufacturing cost and maintenance cost of the pneumatic machine tool can be greatly reduced.

Description

Impact cylinder mechanism of pneumatic machine tool

This model relates to a pneumatic machine tool, in particular to an impact cylinder mechanism of a pneumatic machine tool.

Referring to Figures 1 and 2, when the pneumatic tool with impact function is used, the impact cylinder mechanism 100 is used to drive the impact rod mechanism (not shown) to rotate intermittently to produce the impact effect. The impact cylinder mechanism 100 allows the impact rod mechanism to be rotatably and axially displaced. The inner end surface of the cylinder end wall 11 is recessed with a C-shaped groove 110 around its axis, and is placed in the C-shaped groove. A steel ball 111 capable of rolling and displacing along the longitudinal direction of the C-shaped groove 110 is embedded in the groove 110. When the impact cylinder mechanism 100 rotates relative to the impact rod mechanism, the steel ball 111 will be driven by the impact rod mechanism to be rolled and limited at one end edge of the C-shaped groove 110. At this time, the steel ball 111 will pass through the impact A cam of the lever mechanism drives the impact lever mechanism to rotate intermittently, thereby generating impact force.

However, when the impact cylinder mechanism 100 of this type of pneumatic machine tool is manufactured, an annular groove for inserting the steel ball 111 is processed before the impact cylinder mechanism 100, and then punched through a die forging process. , The cylinder end wall 11 is locally stamped and deformed, so that the annular groove is stamped into a C-shaped groove 110. This method of manufacturing the impact cylinder mechanism 100 through forging processing requires the installation of huge processing tools, which makes the manufacturing cost relatively high, and when the impact cylinder mechanism 100 defines the forging positions at both ends of the C-shaped groove 110 When 112 is damaged by the impact of the steel ball 111 for a long time, the entire impact cylinder mechanism 100 has to be disassembled and replaced, which will also cause high equipment maintenance costs.

Therefore, the object of the present invention is to provide an impact cylinder mechanism of a pneumatic machine tool that can improve at least one of the disadvantages of the prior art.

Therefore, the impact cylinder mechanism of the new pneumatic machine tool is suitable for installing an annular cam seat and a bead. The ring groove can be embedded in a rolling displacement. The impact cylinder mechanism includes a cylinder and two limit stoppers inserted in the cylinder.

The cylinder has a surrounding wall and an end wall which is coaxially connected to one end of the surrounding wall and cooperates with the surrounding wall to define a cylindrical groove. The end wall has an inner end surface facing the cylindrical groove and an outer end surface facing away from the inner end surface. The inner end surface is recessed with a mounting groove coaxially communicating with the cylindrical groove and used for the cam seat to be coaxially arranged, and has A ring-shaped limiting surface that defines the periphery of the installation groove and is used for restraining the ball in the ring groove in a rolling displacement manner. The outer end surface is penetrated with a tooth hole coaxially communicating with the installation groove. The limit stoppers are coaxially inserted on the end wall at intervals along the circumferential edge of the limit surface, and are partially convexly exposed on the limit surface, and can be used to block the rolling displacement of the ball .

The effect of the new type is: through the structural design of the cylinder body and the limit stops of the impact cylinder mechanism, the punching and forging process in the manufacture of the existing impact cylinder mechanism can be completely eliminated, and the production of pneumatic machine tools can be greatly reduced. Costs and machine maintenance costs.

Referring to Figures 3 and 4, an embodiment of the impact cylinder mechanism 200 of the new pneumatic tool 900 is suitable for assembly in the pneumatic tool 900, and can be used for a cam seat mechanism 91 in the pneumatic tool 900 and An impact drive mechanism 92 is coaxially installed, and can be driven to rotate by a driving spindle 94 in the pneumatic tool 900, and the impact drive mechanism 92 is synchronously transmitted through the cam seat mechanism 91 to rotate relative to each other and move back in the axial direction, so that the The impact drive mechanism 92 intermittently drives an impact rod 93 to rotate. The cam seat mechanism 91 includes an annular cam seat 911 and a spherical ball 913. The outer peripheral surface of the cam seat 911 is arcuately inwardly provided with an annular groove 912 surrounding its axis. The ball 913 is The ring groove 912 can be disengaged in the radial direction, and can be rotated and displaced around the axis of the cam seat 911 along the extending direction of the ring groove 912. The impact driving mechanism 92 includes a cam 921, and two impact rods 922 coaxially and radially installed on the outer circumference of the cam 921 at intervals. The cam 921 will be driven by the bead 913 synchronously and axially reciprocally elastically displaced. The synchronous transmission of the impact rods 922 can reciprocate relative to the impact cylinder mechanism 200 between a driving position where the impact rod 93 can be driven and a disengagement position away from the impact rod 93.

Since the cam seat mechanism 91 in the pneumatic machine tool 900 can drive the impact drive mechanism 92 to rotate, and then continuously and intermittently drive the impact rod 93 is the prior art, and is not the focus of the improvement of the present invention, so it will not be described in detail.

Referring to Figures 3, 4, and 5, the impact cylinder mechanism 200 includes a cylinder body 3 that defines an axis 310 extending forward and backward, and two rod-shaped stoppers extending through the cylinder body 3 in the axial direction. 4. The cylinder 3 has an annular wall 31 surrounding the axis 310, and an end wall 32 coaxially connected to the rear end of the surrounding wall 31, and the surrounding wall 31 and the end wall 32 cooperate to define an opening facing Front tube slot 30.

The surrounding wall 31 has a cylindrical mouth end surface 311 that defines the opening of the cylindrical groove 30, and the cylindrical mouth end surface 311 is recessed with two impact grooves 312 that are radially spaced opposite to each other and radially communicate with the cylindrical groove 30.

The end wall 32 has an inner end surface 321 facing forward to the barrel groove 30, and an outer end surface 328 facing away from the inner end surface 321, and has two spaced apart around the axis 310 and extending forward and backward axially through the inner end surface 321 and the receptacle 33 of the outer end surface 328.

The inner end surface 321 is recessed with a mounting groove 322 coaxially communicating with the rear end of the barrel groove 30. The mounting groove 322 has a bead active area 323 which is arranged in sequence from front to back connected to the cylindrical groove 30 and partially radially connected to the insertion holes 33, and an insert with a diameter smaller than the diameter of the bead active area 323. The mounting area 324, and the inner end surface 321 has a ring-shaped limiting surface 325 defining the periphery of the bead active area 323. The insertion hole 33 is partially exposed radially on the limiting surface 325. The outer end surface 328 is recessed with a tooth hole 329 coaxially communicating with the embedding area 324 and having clamping teeth on the periphery.

The limit stoppers 4 penetrate the end wall 32 and are inserted into the insertion holes 33 respectively, and are partially convexly exposed in the bead active area 323.

In this embodiment, the insertion holes 33 are relatively adjacent to one of the impact grooves 312, and the limit stoppers 4 cooperate to divide the ring-shaped limit surface 325 into an arc extending around the axis 310. The bead limiting section 326 and a non-contact section 327, the arc length of the bead limiting section 326 is greater than the arc length of the non-contact section 327. One of the impact grooves 312 is relatively located at the radial outer side of the arc center portion of the bead limiting section 326, and the other impact groove 312 is relatively located at the radial outer side of the arc center portion of the non-contact section 327.

3, 4, 6, when the new impact cylinder mechanism 200 is installed in a pneumatic tool 900 for use, the cylinder body 3 will use the tooth hole 329 for the drive spindle 94 to be inserted and engaged, and will be used The barrel groove 30 and the mounting groove 322 are provided for the impact driving mechanism 92 and the cam seat mechanism 91 to be coaxially arranged back and forth, and the mounting area 324 of the mounting groove 322 is used for the cam seat 911 to be coaxially embedded rearward. 913 will be partially exposed in the bead active area 323. The limiting surface portion 325 surrounds the ring groove 912 of the cam seat 911 at intervals, and the bead limiting section 326 abuts against the bead 913, and the bead 913 is limited in the ring groove 912, The bead 913 can roll and displace in the ring groove 912 and the bead moving area 323 along the length of the bead limiting section 326, and are respectively located at the two ends of the bead limiting section 326. The stopper 4 can be used to limit and block the bead 913.

In addition, the barrel 3 will use the impact grooves 312 for the impact rods 922 to be inserted in axially forward and backward directions, so that the cam 921 connected between the impact rods 922 can be axially displaced and rotated forward and backward. The ground is coaxially arranged in the barrel groove 30. The barrel groove 30 can be used for the impact rod 93 to be inserted backwards, and is coaxially penetrated and engaged with the cam 921, and is rotatably inserted into the cam seat 911.

When the impact cylinder mechanism 200 is driven to rotate by the driving spindle 94, it will drive the bead 913 to move along the bead limit section 326 to the limit and abut against one of the limit stoppers 4. At this time, the cam 921 will be pushed by the ball 913 to rotate relative to the impact rods 922, and synchronously drive the impact rods 922 to move back and forth relative to the cylinder 3 axially, so that the impact rods 922 are at the disengaged position and rotate with the drive. The position changes back and forth, and the impact rod 93 is continuously and intermittently driven. When the impact cylinder mechanism 200 is driven to reverse, it will drive the bead 913 to move along the bead limit section 326 against another limit stop 4, and can be used to drive the cam 921 to rotate and rotate in the reverse direction. Axial displacement.

When the limit stoppers 4 of the new impact cylinder mechanism 200 are hit by the bead 913 and worn to the extent that they need to be replaced, only the limit stoppers 4 need to be disassembled and replaced, and the cylinder 3 does not need to be replaced.

It must be noted that, in this embodiment, each insertion hole 33 is designed as a through hole penetrating through the end wall 32, and each limit stopper 4 is inserted through the end wall 32, but in implementation, In another embodiment of the present invention, the receptacles 33 can also be changed into blind holes extending from the inner end surface 321 to the outer end surface 328, which can also be used for the insertion of the limit stoppers 4.

In summary, through the structural design of the cylinder body 3 and the stoppers 4 of the impact cylinder mechanism 200, the punching and forging process in the manufacture of the existing impact cylinder mechanism 200 can be completely eliminated, and only the cylinder body is required. 3 Drill the holes 33, and insert the limit stops 4 into the holes 33 respectively, then the impact cylinder mechanism 200 with the same function can be made, which can greatly reduce the production of the pneumatic tool 900 cost. Moreover, when the limit stoppers 4 are deformed and damaged by being hit by the bead 913 for a long time, only the limit stoppers 4 need to be replaced, which can greatly reduce the maintenance cost of the machine tool. Therefore, the impact cylinder mechanism 200 of the present invention is indeed a rather innovative and convenient and practical creation, and it can indeed achieve the purpose of a new model.

However, the above are only examples of the present model, and should not be used to limit the scope of implementation of the present model, all simple equivalent changes and modifications made in accordance with the patent scope of the present model application and the contents of the patent specification still belong to This new patent covers the scope.

200: Impact cylinder mechanism 3: cylinder 30: barrel groove 31: Wall 310: Axis 311: end face of tube mouth 312: Impact Slot 32: end wall 321: inner end face 322: installation slot 323: Pearl Activity Area 324: Built-in area 325: Limit Face 326: Bead Limiting Section 327: Non-contact section 328: outer end face 329: Perforation 33: jack 4: limit stop 900: Pneumatic tool machine 91: Cam seat mechanism 911: cam seat 912: ring groove 913: Bead 92: Impact drive mechanism 921: Cam 922: Shock Rod 93: Impact Rod 94: drive spindle

The other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, among which: Figure 1 is a front view illustrating the existing impact cylinder mechanism; Figure 2 is a cross-sectional view taken along line A-A of Figure 1; Figure 3 is a side sectional view illustrating an embodiment of the impact cylinder mechanism of the new type of pneumatic machine tool installed in a pneumatic machine tool; Figure 4 is an incomplete three-dimensional exploded view illustrating the structure of this embodiment; Figure 5 is a perspective exploded view illustrating the structure of this embodiment; and Figure 6 is a front view illustrating the situation when this embodiment is used with a cam seat mechanism.

200: Impact cylinder mechanism

3: cylinder

30: barrel groove

31: Wall

310: Axis

311: end face of tube mouth

312: Impact Slot

32: end wall

321: inner end face

322: installation slot

323: Pearl Activity Area

324: Built-in area

325: Limit Face

326: Bead Limiting Section

327: Non-contact section

33: jack

4: limit stop

91: Cam seat mechanism

911: cam seat

912: ring groove

913: Bead

Claims (8)

An impact cylinder mechanism of a pneumatic machine tool is suitable for installing an annular cam seat and a ball. The outer peripheral surface of the cam seat is radially concavely provided with a ground around its axis and for the ball to roll and displace. Embedded ring groove, the impact cylinder mechanism includes: A cylinder body has a surrounding wall, and an end wall connected to one end of the surrounding wall and cooperating with the surrounding wall to define a cylindrical groove, the end wall having an inner end surface facing the cylindrical groove, and a back facing The inner end surface and the outer end surface, the inner end surface is recessed with a mounting groove coaxially communicating with the cylinder groove and used for coaxially setting the cam seat, and has a peripheral edge defining the mounting groove and used for rolling the ball The displacement limit is located in the annular limit surface in the annular groove, and the outer end surface is penetrated with a tooth hole coaxially communicating with the installation groove; and Two limit stoppers are inserted into the end wall at intervals along the circumferential direction of the limit surface, and partially convexly exposed on the limit surface, and can be used to block the rolling displacement of the ball. The impact cylinder mechanism of a pneumatic machine tool according to claim 1, wherein the end wall has two insertion holes recessed on the inner end surface, and the limit stops are inserted into the insertion holes, respectively. The impact cylinder mechanism of a pneumatic machine tool according to claim 2, wherein the insertion holes of the end wall extend from the inner end surface to the outer end surface, and the stoppers are inserted through the end wall, respectively Located in these jacks. The impact cylinder mechanism of a pneumatic machine tool according to claim 1, wherein the limiting surface portion is arcuately concave outwardly in the radial direction. The impact cylinder mechanism of a pneumatic machine tool according to claim 1 or 4, wherein the installation groove has a bead active area connected to the cylinder groove and surrounded by the limiting surface, and a bead connected to the bead An embedding area between the movable area and the tooth hole and used for embedding and positioning the cam seat. The impact cylinder mechanism of the pneumatic machine tool according to claim 1 is also suitable for installing two impact rods, wherein the surrounding wall has a cylinder mouth end surface facing away from the end wall, and the cylinder mouth end surface is recessed with two The cylindrical grooves are radially spaced opposite to each other and communicated with the cylindrical grooves in the radial direction, and are respectively used for the impact grooves for inserting the impact rods so as to be axially displaceable. The impact cylinder mechanism of a pneumatic machine tool according to claim 6, wherein the limit stoppers divide the limit face into an arc-shaped bead limit section and a non-contact section, and the impact The grooves are respectively located on the radially outer side of the curved center portion of the bead limiting section and the non-contact section. The impact cylinder mechanism of a pneumatic machine tool according to claim 7, wherein the arc length of the bead limiting section is greater than the arc length of the non-contact section.

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