Air cylinder

Abstract

The air cylinder comprises a cylinder body and a piston rod, the cylinder body is provided with a first cavity, the piston rod is partially located in the first cavity, the air cylinder comprises a first guide rod and a fixing plate, the piston rod is connected with the fixing plate, the cylinder body is provided with a second cavity, the first guide rod is partially located in the second cavity, the fixing plate is provided with a first mounting hole, and the first guide rod is provided with a first fixing part. The first fixing part is located in the first mounting hole, the fixing plate is provided with a second mounting hole, the air cylinder comprises a first connecting piece, at least part of the first connecting piece is located in the second mounting hole, the first fixing part is provided with a first containing cavity, part of the first connecting piece is located in the first containing cavity, and the included angle between the axis of the first mounting hole and the axis of the second mounting hole is theta; 0 < theta < = 90 degrees. The first fixing part is located in the first mounting hole, the influence of the perpendicularity of the end face of the first guide rod and the axis of the first guide rod on the operation stability of the air cylinder is reduced, and the operation stability of the air cylinder is improved.

Description

Technical Field

[0001] The utility model relates to the field of pneumatics, in particular to a cylinder. Background Art

[0002] refer to Fig.18 A cylinder comprises a cylinder body 1', a piston rod 2', a fixed plate 3' and a guide rod 4'. The piston rod 2' can reciprocate in the cylinder body 1'. The fixed plate 3' is connected to the piston rod 2'. The piston rod 2' drives the fixed plate 3' to reciprocate. The guide rod 4' is connected to the fixed plate 3'. The fixed plate 3' drives the guide rod 4' to reciprocate in the cylinder body 1'. The guide rod 4' improves the stability of the movement of the fixed plate 3'.

[0003] refer to Fig.18 The guide rod 4' is provided with a screw hole 41', the fixing plate 3' is provided with a step hole, the fixing plate has a step portion 31', the cylinder includes a screw 5', the screw 5' passes through the step hole and matches with the screw hole 41', the head of the screw 5' abuts against the step portion 31', and the fixing plate has a first wall portion 32', so that the end face of the guide rod 4' abuts against the inner wall of the first wall portion 32', thereby connecting the guide rod 4' to the fixing plate 3'.

[0004] In order to ensure the stability of cylinder operation, it is necessary to ensure the parallelism of the step portion 31' and the first wall portion 32', the verticality of the step hole and the step portion 31' and the first wall portion 32', and the verticality of the end face of the guide rod 4' and the axis of the guide rod 4'. The stability of cylinder operation needs to be further improved. Utility Model Content

[0005] In order to solve the above problems, the following technical solution is provided: a cylinder, comprising a cylinder body and a piston rod, the cylinder body having a first chamber, part of the piston rod being located in the first chamber, the cylinder comprising a first guide rod and a fixing plate, the piston rod being connected to the fixing plate, the cylinder body having a second chamber, part of the first guide rod being located in the second chamber, the fixing plate having a first mounting hole, the first guide rod having a first fixing portion, the first fixing portion being located in the first mounting hole, the fixing plate having a second mounting hole, the cylinder comprising a first connecting member, at least part of the first connecting member being located in the second mounting hole, the first fixing portion having a first accommodating cavity, part of the first connecting member being located in the first accommodating cavity, the angle between the axis of the first mounting hole and the axis of the second mounting hole being θ, 0<θ≤90°.

[0006] Such a cylinder includes a cylinder body, a piston rod, a first guide rod and a fixed plate, the fixed plate has a first mounting hole, the first guide rod has a first fixing portion, the first fixing portion is located in the first mounting hole, the fixing plate has a second mounting hole, the cylinder includes a first connecting member, at least part of the first connecting member is located in the second mounting hole, the first fixing portion has a first accommodating cavity, part of the first connecting member is located in the first accommodating cavity, the angle between the axis of the first mounting hole and the axis of the second mounting hole is θ, 0<θ≤90°, the first fixing portion is located in the first mounting hole, the influence of the verticality between the end face of the first guide rod and the axis of the first guide rod on the stability of the cylinder operation is reduced, and the stability of the cylinder operation is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a three-dimensional diagram of an embodiment of the cylinder in the utility model;

[0008] Figure 2 It is a cross-sectional view of an embodiment of the cylinder in the utility model;

[0009] Figure 3 is another cross-sectional view of an embodiment of the cylinder in the utility model;

[0010] Figure 4 It is a three-dimensional view of a fixing plate of an embodiment of the cylinder in the utility model;

[0011] Figure 5 It is a cross-sectional view of a fixing plate of an embodiment of the cylinder in the utility model;

[0012] Figure 6 It is a partial structural schematic diagram of an embodiment of the cylinder in the utility model;

[0013] Figure 7 It is a three-dimensional diagram of a first guide rod of an embodiment of a cylinder in the utility model;

[0014] Figure 8 It is a three-dimensional diagram of a first connecting member of an embodiment of the cylinder in the utility model;

[0015] Fig. 9 It is a cross-sectional view of another embodiment of the cylinder in the utility model;

[0016] Fig.10 is another cross-sectional view of another embodiment of the cylinder in the utility model;

[0017] Fig.11 It is a three-dimensional view of a fixing plate of another embodiment of the cylinder in the utility model;

[0018] Fig.12 It is a cross-sectional view of a fixing plate of another embodiment of the cylinder in the utility model;

[0019] Fig.13 It is a partial structural schematic diagram of another embodiment of the cylinder in the utility model;

[0020] Fig.14 It is a three-dimensional diagram of a first guide rod of another embodiment of the cylinder in the utility model;

[0021] Fig.15 is a cross-sectional view of a first connecting member of another embodiment of the cylinder in the utility model;

[0022] Fig.16 It is a cross-sectional view of another embodiment of the cylinder in the utility model;

[0023] Fig.17 It is another cross-sectional view of another embodiment of the cylinder in the utility model;

[0024] Fig.18 It is a structural schematic diagram of the background technology in the utility model.

[0025] Reference numerals:

[0026] Cylinder body 1, first chamber 11, second chamber 12, third chamber 13,

[0027] Piston rod 2,

[0028] The first guide rod 3, the first fixing portion 31, the first groove 32, the first upper side wall 321, the first lower side wall 322, the first accommodating cavity 323,

[0029] The fixing plate 4, the first mounting hole 41, the second mounting hole 42, the third mounting hole 43, the fourth mounting hole 44, the main mounting hole 45,

[0030] The first connecting member 5, the first connecting portion 51, the first side wall portion 511, the second side wall portion 512, the second connecting portion 52, the first main body portion 53, the first limiting portion 54,

[0031] The first threaded fastener 6,

[0032] The second guide rod 7, the second fixing portion 71,

[0033] A second connecting member 8 , a front cover assembly 9 , a piston assembly 10 , and a rear cover assembly 20 . DETAILED DESCRIPTION

[0034] The technical solution of the specific implementation method is described below in conjunction with the accompanying drawings.

[0035] It should be noted that: although this specification has described the utility model in detail with reference to the above-mentioned implementation modes, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify, combine or replace the utility model with equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the utility model should be included in the scope of the claims of the utility model.

[0036] refer to Figure 1-Figure 2 A cylinder comprises a cylinder body 1, a piston rod 2, a front cover assembly 9, a piston assembly 10, a rear cover assembly 20 and a fixed plate 4, the cylinder body 1 having a first chamber 11, a portion of the piston rod 2 being located in the first chamber 11, an end of the front cover assembly 9 close to the first chamber 11 being arranged in the first chamber 11, and the other end of the rear cover assembly 20 close to the first chamber 11 being arranged in the first chamber 11, one end of the piston rod 2 being connected to the fixed plate 4, for example, being fixedly provided with a main mounting hole 45, the main mounting hole 45 being arranged as a step hole, a screw / bolt passing through the main mounting hole 45 and connected to the piston rod 2, a portion of the piston assembly 10 being connected to the other end of the piston rod 2, the piston assembly 10 being able to drive the piston rod 2 to reciprocate under the action of an air source (compressed air) or the like, and the piston rod 2 drives the fixed plate 4 to reciprocate.

[0037] refer to Figure 1-Figure 2 The cylinder includes a first guide rod 3, the cylinder body 1 has a second chamber 12, a portion of the first guide rod 3 is located in the second chamber 12, the fixing plate 4 has a first mounting hole 41, the first guide rod 3 has a first fixing portion 31, the first fixing portion 31 is located in the first mounting hole 41, the fixing plate 4 has a second mounting hole 42, the cylinder includes a first connecting member 5, at least a portion of the first connecting member 5 is located in the second mounting hole 42, the first fixing portion 31 has a first accommodating cavity 323, a portion of the first connecting member 5 is located in the first accommodating cavity 323, the angle between the axis of the first mounting hole 41 and the axis of the second mounting hole 42 is θ, 0<θ≤90°.

[0038] Such a cylinder comprises a cylinder body 1, a piston rod 2, a first guide rod 3 and a fixing plate 4, wherein the fixing plate 4 has a first mounting hole 41, the first guide rod 3 has a first fixing portion 31, the first fixing portion 31 is located in the first mounting hole 41, the fixing plate 4 has a second mounting hole 42, the cylinder comprises a first connecting member 5, at least part of the first connecting member 5 is located in the second mounting hole 42, the first fixing portion 31 has a first accommodating cavity 323, part of the first connecting member 5 is located in the first accommodating cavity 323, the angle between the axis of the first mounting hole 41 and the axis of the second mounting hole 42 is θ, 0<θ≤90°, the first fixing portion 31 is located in the first mounting hole 41, the influence of the perpendicularity between the end face of the first guide rod 3 and the axis of the first guide rod 3 on the stability of the cylinder operation is reduced, and the stability of the cylinder operation is improved.

[0039] The included angle between the axis of the first mounting hole 41 and the axis of the second mounting hole 42 can be 45°, 90°, etc., and can be set according to specific needs to prevent the first guide rod 3 from being separated from the fixing plate 4.

[0040] The top end of the first guide rod 3 is substantially flush with the wall of the fixing member facing away from the cylinder body 1 , and the first fixing portion 31 is located in the first mounting hole 41 . The contact area between the first guide rod 3 and the fixing plate 4 is increased, thereby improving the lateral load capacity.

[0041] refer to Figure 7 The first fixing portion 31 has a first groove 32, the first groove 32 is recessed in the outer peripheral wall of the first fixing portion 31, and the first groove 32 has a first accommodating cavity 323,

[0042] refer to Figure 3 , Figure 6-Figure 8 The first connecting member 5 includes a first connecting portion 51, and the first connecting portion 51 has a first side wall portion 511 and a second side wall portion 512. The first side wall portion 511 is a portion of the outer peripheral wall of the cylinder, and the second side wall portion 512 is a portion of the outer peripheral wall of the cone or the frustum. The first side wall portion 511 is adapted to the inner wall of the second mounting hole 42, and the second side wall portion 512 is adapted to the first groove 32.

[0043] refer to Figure 4-Figure 5 In the thickness direction of the fixing plate 4, the first mounting hole 41 penetrates the fixing plate 4 in the thickness direction of the fixing plate 4, and the second mounting hole 42 penetrates the fixing plate 4 in the width direction of the fixing plate 4. The axis of the first mounting hole 41 is perpendicular to the axis of the second mounting hole 42, which facilitates the processing of the first mounting hole 41 and the second mounting hole 42.

[0044] refer to Figure 4-Figure 5 The axes of the first mounting hole 41 and the second mounting hole 42 do not intersect, the first mounting hole 41 is connected to the second mounting hole 42, and the first connecting member 5 is set to be wedge-shaped. During assembly, the first connecting member 5 is inserted from one end of the second mounting hole 42 to the second mounting hole 42. As the insertion depth of the first connecting member 5 increases, the first side wall portion 511 is pressed against the hole wall corresponding to the second through hole, and the second side wall portion 512 is pressed against the groove wall of the first groove 32, thereby connecting the first guide rod 3 to the fixing plate 4 to prevent the first guide rod 3 from being separated from the fixing plate 4.

[0045] refer to Figure 3 and Figure 8 The first connecting member 5 includes a second connecting portion 52, the second connecting portion 52 is cylindrical, the first connecting portion 51 extends from the top surface of the second connecting portion 52, the first side wall portion 511 extends from the top surface of the second connecting portion 52, the second side wall portion 512 extends from the top surface of the second connecting portion 52, the second connecting portion 52 is adapted to the second mounting hole 42, and the axis of the second connecting portion 52 coincides with the axis of the second mounting hole 42.

[0046] refer to Figure 3 The cylinder includes a first threaded fastener 6, which abuts against the bottom surface of the second connecting portion 52. A portion of the hole wall of the second mounting hole 42 is provided with an internal thread. The first threaded fastener 6 is adapted to the internal thread to prevent the first connecting member 5 from slipping out of the second mounting hole 42.

[0047] refer to Figure 1-Figure 2 The cylinder includes a second guide rod 7, the cylinder body 1 has a third chamber 13, a portion of the second guide rod 7 is located in the third chamber 13, the fixing plate 4 has a third mounting hole 43, the second guide rod 7 has a second fixing portion 71, the second fixing portion 71 is located in the third mounting hole 43, the fixing plate 4 has a fourth mounting hole 44, the cylinder includes a second connecting member 8, at least a portion of the second connecting member 8 is located in the fourth mounting hole 44, the second fixing portion 71 has a second accommodating cavity, a portion of the second connecting member 8 is located in the second accommodating cavity, and the angle between the axis of the third mounting hole 43 and the axis of the fourth mounting hole 44 is θ, 0<θ≤90°.

[0048] The second connecting member 8 is substantially the same as the first connecting member 5 , the second mounting hole 42 is located between the main mounting hole 45 and the first mounting hole 41 , the fourth mounting hole 44 is located between the main mounting hole 45 and the third mounting hole 43 , and the first connecting member 5 and the second connecting member 8 are located between the first guide rod 3 and the second guide rod 7 .

[0049] refer to Figure 9-10 , Fig.15 The first connecting member 5 includes a first main body portion 53 and a first limiting portion 54. The first groove 32 has a first upper side wall 321 and a first lower side wall 322. At least part of the first limiting portion 54 is located between the first upper side wall 321 and the first lower side wall 322. The side walls of the first limiting portion 54 have a gap or interference fit with the first upper side wall 321 and the first lower side wall 322 to prevent the second guide rod 7 from detaching from the fixed plate 4.

[0050] refer to Fig.10 , Fig.13 and Fig.15 The first limiting portion 54 is in a truncated cone shape. In the axial direction of the first limiting portion 54, the radius of the first limiting portion 54 from the first main body portion 53 is reduced, which facilitates the assembly of the first limiting portion 54 with the first groove 32. The upper bottom surface of the first limiting portion 54 abuts against the bottom wall of the first groove 32, reducing the possibility of loosening of the first connecting member 5.

[0051] The first upper side wall 321 is matched with the side surface of the first limiting portion 54 , and the first upper side wall 321 is inclined. The first lower side wall 322 is matched with the side surface of the first limiting portion 54 , and the first lower side wall 322 is inclined.

[0052] refer to Fig.14The first groove 32 is annular, which reduces the difficulty of aligning the first connecting member 5 with the first groove 32 and facilitates assembly.

[0053] refer to Figure 11-Figure 12 The axis of the first mounting hole 41 intersects with the axis of the second mounting hole 42, thereby improving the reliability of the installation.

[0054] refer to Fig. 9 The cylinder includes a second guide rod 7, the cylinder body 1 has a third chamber 13, a portion of the second guide rod 7 is located in the third chamber 13, the fixing plate 4 has a third mounting hole 43, the second guide rod 7 has a second fixing portion 71, the second fixing portion 71 is located in the third mounting hole 43, the fixing plate 4 has a fourth mounting hole 44, the cylinder includes a second connecting member 8, at least a portion of the second connecting member 8 is located in the fourth mounting hole 44, the second fixing portion 71 has a second accommodating cavity, a portion of the second connecting member 8 is located in the second accommodating cavity, and the angle between the axis of the third mounting hole 43 and the axis of the fourth mounting hole 44 is θ, 0<θ≤90°.

[0055] The second connecting member 8 is substantially the same as the first connecting member 5 , and will not be described in detail herein.

[0056] refer to Figure 16-Figure 17 The first connecting member 5 is configured to be wedge-shaped, and the second connecting member 8 is configured to have a first limiting portion 54 in the shape of a truncated cone, which will not be described in detail here.

[0057] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A cylinder, comprising a cylinder body (1) and a piston rod (2), wherein the cylinder body (1) has a first chamber (11), and a portion of the piston rod (2) is located in the first chamber (11), characterized in that: The cylinder comprises a first guide rod (3) and a fixing plate (4), the piston rod (2) being connected to the fixing plate (4), the cylinder body (1) having a second chamber (12), a portion of the first guide rod (3) being located in the second chamber (12), the fixing plate (4) having a first mounting hole (41), the first guide rod (3) having a first fixing portion (31), the first fixing portion (31) being located in the first mounting hole (41), the fixing plate (4) having a second mounting hole (42), the cylinder comprising a first connecting member (5), at least a portion of the first connecting member (5) being located in the second mounting hole (42), the first fixing portion (31) having a first accommodating cavity (323), a portion of the first connecting member (5) being located in the first accommodating cavity (323), the angle between the axis of the first mounting hole (41) and the axis of the second mounting hole (42) being θ, 0<θ≤90°.

2. The cylinder according to claim 1, characterized in that The first fixing portion (31) has a first groove (32), the first groove (32) is recessed in the outer peripheral wall of the first fixing portion (31), and the first groove (32) has the first accommodating cavity (323).

3. The cylinder according to claim 2, characterized in that The first connecting member (5) comprises a first connecting portion (51), the first connecting portion (51) having a first side wall portion (511) and a second side wall portion (512), the first side wall portion (511) being a portion of the outer peripheral wall of a cylinder, the second side wall portion (512) being a portion of the outer peripheral wall of a cone or a frustum, the first side wall portion (511) being adapted to the inner wall of the second mounting hole (42), and the second side wall portion (512) being adapted to the first groove (32).

4. The cylinder according to claim 3, characterized in that The first connecting member (5) comprises a second connecting portion (52), the second connecting portion (52) is columnar, the first connecting portion (51) extends from the top surface of the second connecting portion (52), the first side wall portion (511) extends from the top surface of the second connecting portion (52), the second side wall portion (512) extends from the top surface of the second connecting portion (52), and the second connecting portion (52) is adapted to the second mounting hole (42).

5. The cylinder according to claim 4, characterized in that The cylinder comprises a first threaded fastener (6), the first threaded fastener (6) abuts against the bottom surface of the second connecting portion (52), a portion of the hole wall of the second mounting hole (42) is provided with an internal thread, and the first threaded fastener (6) is adapted to the internal thread.

6. The cylinder according to claim 2, characterized in that The first connecting member (5) comprises a first main body portion (53) and a first limiting portion (54); the first groove (32) has a first upper side wall (321) and a first lower side wall (322); at least a portion of the first limiting portion (54) is located between the first upper side wall (321) and the first lower side wall (322).

7. The cylinder according to claim 6, characterized in that The first limiting portion (54) is in the shape of a truncated cone, the upper bottom surface of the first limiting portion (54) abuts against the bottom wall of the first groove (32), the first upper side wall (321) is matched with the side surface of the first limiting portion (54), and the first lower side wall (322) is matched with the side surface of the first limiting portion (54).

8. The cylinder according to claim 6, characterized in that The axis of the first mounting hole (41) intersects with the axis of the second mounting hole (42).

9. The cylinder according to any one of claims 1 to 8, characterized in that: In the thickness direction of the fixing plate (4), the first mounting hole (41) penetrates the fixing plate (4) in the thickness direction of the fixing plate (4), and the second mounting hole (42) penetrates the fixing plate (4) in the width direction of the fixing plate (4).

10. The cylinder according to any one of claims 1 to 8, characterized in that: The cylinder comprises a second guide rod (7), the cylinder body (1) has a third chamber (13), part of the second guide rod (7) is located in the third chamber (13), the fixing plate (4) has a third mounting hole (43), the second guide rod (7) has a second fixing portion (71), the second fixing portion (71) is located in the third mounting hole (43), the fixing plate (4) has a fourth mounting hole (44), the cylinder comprises a second connecting member (8), at least part of the second connecting member (8) is located in the fourth mounting hole (44), the second fixing portion (71) has a second accommodating cavity, part of the second connecting member (8) is located in the second accommodating cavity, and an angle between an axis of the third mounting hole (43) and an axis of the fourth mounting hole (44) is θ, 0<θ≤90°.

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