CN217177033U

CN217177033U - Cylinder

Info

Publication number: CN217177033U
Application number: CN202220237792.4U
Authority: CN
Inventors: 古宇田直树
Original assignee: SMC Corp
Current assignee: SMC Corp
Priority date: 2021-01-29
Filing date: 2022-01-28
Publication date: 2022-08-12
Anticipated expiration: 2032-01-28
Also published as: JP3231523U; DE202022100225U1; TWM628158U; KR20220001924U

Abstract

An air cylinder has a stroke adjustment mechanism composed of an adjustment block (20) mounted to a slide table (14) and a stopper (22) mounted to a cylinder body (12). The side wall part (14b) of the slide table has three or more screw holes (18) arranged in the moving direction of the slide table. Two adjustment block mounting bolts (30) are inserted through the adjustment blocks and selectively threadedly engage adjacent ones of the plurality of threaded holes.

Description

Cylinder

Technical Field

The utility model relates to a cylinder that possesses the slip table especially relates to a can adjust cylinder of stroke of slip table.

Background

Conventionally, in a cylinder provided with a slide table slidably supported by a cylinder body, a mechanism for adjusting the stroke of the slide table is known.

For example, japanese patent application laid-open No. 10-9211 describes a fluid pressure actuator in which a block to which a stroke adjustment stopper is attached is fitted to a side surface of a cylinder pipe. The stroke adjustment stopper is constituted by a stopper bolt and a nut. The block body capable of abutting against the stopper bolt is disposed on the side surface of the slide table. In this fluid pressure actuator, the stroke of the slide table can be adjusted by adjusting the amount of screwing of the stopper bolt into the block of the cylinder pipe.

In the case where the stroke of the slide table is adjusted by such a stopper bolt, it is necessary to use a long stopper bolt in order to expand the adjustment range. However, if the stopper bolt is lengthened, the stopper bolt may be easily bent and damaged. In addition, when the stopper bolt is lengthened, the stopper bolt protrudes significantly from the end of the cylinder tube.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem.

The cylinder of the present invention has a sliding table slidably supported by the cylinder body and a stroke adjusting mechanism. The stroke adjusting mechanism is composed of an adjusting block arranged on the sliding table and a stop piece arranged on the cylinder body. The side wall portion of the slide table has three or more screw holes arranged in the moving direction of the slide table. Two adjustment block mounting bolts are inserted through the adjustment block and selectively threadedly engage adjacent ones of the plurality of threaded holes.

According to the cylinder, the stroke of the sliding table can be adjusted through the adjusting block. Therefore, the durability of the stroke adjustment mechanism is improved. In addition, the stroke adjustment mechanism does not protrude significantly from the end of the cylinder.

The utility model discloses a cylinder has stroke adjustment mechanism, and this stroke adjustment mechanism comprises the regulating block that can change the position of installing in the slip table and the retainer of installing in the cylinder body. Therefore, the durability of the stopper is improved, and the stopper does not protrude significantly from the end of the cylinder.

The above objects, features and advantages will become more apparent from the following description of preferred embodiments taken in conjunction with the accompanying drawings.

Drawings

Fig. 1 is an external perspective view of a cylinder according to a first embodiment of the present invention.

Fig. 2 is a side view of the cylinder of fig. 1.

Fig. 3 is a sectional view of the cylinder of fig. 1 taken along the line III-III of fig. 2, with the side wall portions of the regulation block and the slide table sectioned.

Fig. 4 is a cross-sectional view of the cylinder of fig. 1 with the stopper cut along line IV-IV of fig. 2.

Fig. 5 is a diagram showing a state in which the adjustment block is removed from the cylinder of fig. 1.

Fig. 6 is a side view of the cylinder of fig. 1 with the slide table moved to the projecting end.

Fig. 7 is an external perspective view of a cylinder according to a second embodiment of the present invention, and is a view showing a state in which an adjustment block is removed.

Fig. 8 is a sectional view of the cylinder of fig. 7 cut out the side wall portions of the regulation block and the slide table.

Detailed Description

In the following description, the directions in the drawings are referred to for convenience when the description is made in the vertical direction, and the actual arrangement of the respective members is not limited.

(first embodiment)

A cylinder 10 according to a first embodiment of the present invention will be described with reference to fig. 1 to 6. The cylinder 10 includes a slide table 14, and the slide table 14 is slidably supported by the cylinder body 12 by a linear guide mechanism, not shown. In addition, the cylinder 10 has a stroke adjustment mechanism. The stroke adjustment mechanism has an adjustment block 20 mounted to the slide table 14 and a stopper 22 mounted to the cylinder body 12.

A piston (not shown) driven by supply and discharge of air is disposed inside the cylinder 12. An end of a piston rod (not shown) that moves integrally with the piston is coupled to the end plate 28. The end plate 28 is coupled to the slide table 14. The slide table 14 is a member having a U-shaped cross section. The slide table 14 includes a flat plate portion 14a having a rectangular shape in plan view and a pair of side wall portions 14 b. The pair of side wall portions 14b project downward from a pair of side edges of the flat plate portion 14a on the opposite side to each other.

One side wall portion 14b of the slide table 14 has a plurality of positioning slits 16a to 16e formed by concave portions extending in the vertical direction. The positioning slits 16a to 16e are arranged at equal intervals in the longitudinal direction of the side wall portion 14b that coincides with the moving direction (a direction) of the slide table 14. The side wall portion 14b has screw holes 18 penetrating the side wall portion 14b between the adjacent positioning slits 16a to 16e and outside the positioning slits 16a and 16e at both ends. In other words, the positioning slits 16a to 16e are disposed between adjacent screw holes 18. These screw holes 18 are arranged at the same intervals as the positioning slits 16a to 16e in the longitudinal direction of the side wall portion 14 b.

The total number of screw holes 18 is one more than the total number of positioning slits 16a to 16 e. In the present embodiment, there are five positioning slits 16a to 16e and six screw holes 18, but there may be two or more positioning slits, and there may be three or more screw holes 18 more than one positioning slit. Reference numeral 34 denotes bolts for attaching a guide rail constituting a part of the guide mechanism to the slide table 14. Reference numeral 36 denotes a groove for mounting a position sensor provided in the cylinder 12.

One side surface of the adjusting block 20 in a rectangular parallelepiped shape has a convex portion 20a that can be selectively fitted into one of the plurality of positioning slits 16a to 16 e. The adjustment block 20 has a pair of insertion holes 20b penetrating the adjustment block 20 on both sides of the convex portion 20 a.

The convex portion 20a of the adjustment block 20 is fitted into a selected positioning slit of the plurality of positioning slits 16a to 16 e. The two adjusting block mounting bolts 30 are inserted through the insertion holes 20b of the adjusting blocks 20. The two adjustment block mounting bolts 30 are selectively screwed with the adjacent screw holes 18 of the side wall portion 14b of the slide table 14. Thereby, the adjustment block 20 is laterally projected from the side wall portion 14b and fixed to the slide table 14. Thus, the adjustment block 20 can be attached to the side wall portion 14b on one side of the slide table 14 so that the attachment position of the adjustment block can be changed in the longitudinal direction of the side wall portion 14 b.

The stopper 22 is composed of a support block 24 and an adjusting bolt 26 fitted to the support block 24. The support block 24 is attached to the side surface of the cylinder block 12 by a support block attachment bolt 32. The adjusting bolt 26 is supported by the support block 24 with its axis directed in the moving direction of the slide table 14. The tip end of the adjustment bolt 26 protrudes from the support block 24 toward the adjustment block 20, and can abut against the front surface (side surface in the a1 direction) of the adjustment block 20. When the adjustment block 20 abuts the adjustment bolt 26 in association with the movement of the slide table 14 in the a1 direction, the movement of the slide table 14 is restricted.

The length of the distal end of the adjusting bolt 26 protruding from the support block 24 can be adjusted by increasing or decreasing the screwing amount of the adjusting bolt 26 with respect to the support block 24. The adjustment of the projecting length of the adjustment bolt 26 can be performed within a range of almost the same length as the interval of the positioning slits 16a to 16e in the adjustment block 20. That is, the difference between the maximum projection length and the minimum projection length of the adjustment bolt 26 is substantially the same as the interval between the positioning slits 16a to 16 e.

This setting is because it is considered that the stroke adjustment of the slide table 14 by the adjustment block 20 stays in the stepwise adjustment with the interval of the positioning slits 16a to 16e as the minimum unit. That is, the stroke of the slide table 14 can be adjusted steplessly, and the share of the stroke adjustment by the adjustment bolt 26 can be minimized. This can shorten the length of the adjustment bolt 26 as much as possible and improve the strength thereof. Further, the length of the rear end of the adjusting bolt 26 protruding from the support block 24 in the a1 direction can be reduced. Further, as the structure of the stopper 22, a rotation stop nut that adjusts the bolt 26 may be included.

When the projection 20a of the adjustment block 20 is fitted into the positioning slit 16e at the end in the a2 direction of the five positioning slits 16a to 16e and the protruding length of the adjustment bolt 26 is minimized, the stroke of the slide table 14 is maximized. Further, when the projection 20a of the adjustment block 20 is fitted into the positioning slit 16a in the a1 direction among the five positioning slits 16a to 16e and the projecting length of the adjustment bolt 26 is maximized, the stroke of the slide table 14 becomes minimum.

Therefore, the stroke of the slide table 14 can be adjusted steplessly within the range of the following first length plus the second length. The first length is a distance from the positioning slit 16a at the end in the a1 direction to the positioning slit 16e at the end in the a2 direction. The second length is the difference between the maximum protruding length and the minimum protruding length of the adjustment bolt 26. The number of positioning slits is n, and the interval between the positioning slits is D. In the case where the difference between the maximum projection length and the minimum projection length of the adjustment bolt 26 is equal to the interval of the positioning slits, the stroke of the slide table 14 can be adjusted steplessly within the length range of D × n.

The operation of the cylinder 10 of the present embodiment configured as described above will be described below.

In fig. 1 and 2, the projection 20a of the adjustment block 20 is fitted into the positioning slit 16e at the end in the a2 direction of the five positioning slits 16a to 16 e. In addition, the protruding length of the adjustment bolt 26 is neither minimum nor maximum. Also, the piston rod is at the most retracted position into the cylinder 12. Namely, the slide table 14 is at the moving end in the a2 direction.

When the piston is driven in the forward direction (a1 direction) by supplying and discharging air from this state, the piston rod is driven in the push-out direction. Thereby, the slide table 14 is moved in a direction protruding from the cylinder body 12. When the slide table 14 moves by a predetermined amount in the a1 direction, as shown in fig. 6, the adjustment block 20 attached to the slide table 14 abuts against the adjustment bolt 26 of the stopper 22. Thereby, the slide table 14 reaches the moving end in the a1 direction.

In the stroke of the slide table 14 in this case, the convex portion 20a of the adjustment block 20 is fitted into the positioning slit 16e at the end in the a2 direction. Therefore, the stroke of the slide table 14 approaches the maximum value. When the stroke of the slide table 14 is finely adjusted from this set state, the screwing amount of the adjustment bolt 26 with respect to the support block 24 may be increased or decreased.

When the stroke of the slide table 14 is to be changed within a range exceeding the fine adjustment, the adjustment block 20 is temporarily removed from the slide table 14. Then, any one of the other positioning slits 16a to 16d is selected to be fitted into the convex portion 20a of the adjustment block 20, and the adjustment block 20 is fixed to the slide table 14 again.

The cylinder 10 according to the present embodiment includes a stroke adjustment mechanism including an adjustment block 20 that can be changed in position to be attached to the slide table 14, and a stopper 22 attached to the cylinder body 12. Therefore, the durability of the adjustment bolt 26 is improved, and the adjustment bolt 26 does not protrude significantly from the end of the cylinder block 12.

In the present embodiment, the adjustment bolt 26 is used to finely adjust the stroke of the slide table 14. However, for example, in the case where the interval of the positioning slits is sufficiently small, the adjusting bolt 26 need not be used. In this case, for example, the stopper pin may be simply fixed to the support block 24.

(second embodiment)

Next, a cylinder 40 according to a second embodiment of the present invention will be described with reference to fig. 7 and 8. The positioning unit of the adjusting block with respect to the side wall portion of the slide table of the second embodiment is different from that of the first embodiment. The same or equivalent components as those of the cylinder 10 are denoted by the same reference numerals, and detailed description thereof is omitted.

The side wall portion 14b on one side of the slide table 14 has a plurality of positioning holes 46a to 46 e. The positioning holes 46a to 46e are arranged at equal intervals in the longitudinal direction of the side wall portion 14 b. The side wall portion 14b has screw holes 18 penetrating the side wall portion 14b between adjacent positioning holes 46a to 46e and outside the

positioning holes

46a and 46e at both ends. In other words, the positioning holes 46a to 46e are disposed between adjacent screw holes 18. These screw holes 18 are arranged at the same intervals as the positioning holes 46a to 46e in the longitudinal direction of the side wall portion 14 b.

One side surface of the rectangular parallelepiped adjusting block 42 has a spring pin 44 that can be selectively fitted into one of the plurality of positioning holes 46a to 46 e. The spring pin 44 is formed by bending a thin plate into a cylindrical shape. The spring pin 44 is driven into a hole formed in a side surface of the adjustment block 42 and fixed to the hole. The adjustment block 42 has a pair of insertion holes 42a penetrating the adjustment block 42 on both sides of the spring pin 44.

The spring pin 44 protruding from the adjustment block 42 is fitted into a selected positioning hole of the plurality of positioning holes 46a to 46 e. The two adjustment block mounting bolts 30 are inserted through the insertion holes 42a of the adjustment blocks 42. Two adjustment block mounting bolts 30 are selectively screwed with the adjacent screw holes 18 of the side wall portion 14b of the slide table 14. Thus, the adjustment block 42 can be attached to the side wall portion 14b on one side of the slide table 14 so that the attachment position of the adjustment block can be changed in the longitudinal direction of the side wall portion 14 b.

The air cylinder 40 according to the present embodiment includes a stroke adjustment mechanism including an adjustment block 42 that can be changed in position to be attached to the slide table 14, and the stopper 22 attached to the cylinder body 12. Therefore, the durability of the adjustment bolt 26 is improved, and the adjustment bolt 26 does not protrude significantly from the end of the cylinder block 12. The adjustment block 42 is positioned by a plurality of positioning holes 46a to 46e provided in the spring pin 44 fixed to the adjustment block 42 and the side wall portion 14b of the slide table 14. Therefore, the structure of the positioning unit becomes a simple structure.

The present invention is not limited to the above-described embodiments, and various configurations can be adopted without departing from the gist of the present invention.

Claims

1. A cylinder having a slide table slidably supported by a cylinder body,

the slide table is provided with a stroke adjusting mechanism which is composed of an adjusting block arranged on the slide table and a stop piece arranged on the cylinder body, the side wall part of the slide table is provided with a plurality of threaded holes arranged in the moving direction of the slide table, the number of the threaded holes is more than three, and two adjusting block mounting bolts are inserted through the adjusting block and are selectively screwed with adjacent threaded holes in the plurality of threaded holes.

2. Cylinder according to claim 1,

the side wall portion of the slide table has a positioning slit between the adjacent screw holes, and the adjustment block has a projection portion that can be selectively fitted into one of the plurality of positioning slits.

3. Cylinder according to claim 1,

the side wall portion of the slide table has a positioning hole between the adjacent screw holes, and the adjustment block has a spring pin that can be selectively fitted into one of the plurality of positioning holes.

4. Cylinder according to claim 1,

the stop piece is composed of a supporting block mounted on the sliding table and an adjusting bolt assembled on the supporting block.