Oil cylinder with built-in hydraulic locker

Abstract

The utility model relates to an oil cylinder with a built-in hydraulic locker, which comprises an oil cylinder assembly and a locking assembly, one end of an oil cylinder piston in a cylinder barrel is provided with a mounting groove along the axial direction, the locking assembly comprises a conical head rod, an expansion sleeve rod and a locking mechanism, the conical head rod penetrates through the expansion sleeve rod, one end of the conical head rod is provided with an expansion conical head, one end of the expansion sleeve rod is provided with an expansion port, and the locking mechanism is connected with the expansion conical head. The end, provided with an expansion opening, of the expansion sleeve rod extends into the mounting groove, the other end of the expansion sleeve rod is fixedly connected with the inner wall of the cylinder barrel, a locking cavity is further formed in the inner wall, connected with the expansion sleeve rod, of the cylinder barrel, one end of the conical head rod penetrates through the inner wall of the cylinder barrel and extends into the locking cavity, and a piston piece is arranged at the end, in the locking cavity, of the conical head rod. The face, away from the conical head rod, of the piston piece and the inner wall of the locking cavity form a loosening oil cavity, the cylinder barrel is provided with an oil way communicated with the loosening oil cavity, and the locking mechanism is arranged between the end, stretching into the locking cavity, of the conical head rod and the piston piece. The utility model has no requirement on the use environment, and can be used in a more hostile environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic oil cylinder technical field more specifically, it relates to an oil cylinder of built -in hydraulic lock. BACKGROUND

[0002] Hydraulic oil cylinder in use, often need to control the extension length of piston rod, the current commonly used one mode is to adopt mechanical locking mechanism namely lock to realize the position locking of oil cylinder piston rod, this mode has the advantages of relative safety, reliable, economic, this type of lock has begun to apply in many fields in the domestic, more common structure is: locking cone cover adopts the thin wall of having the cutting groove's cone cover, through the outer cone cover of folding spring drive, extrude locking cone cover, make locking cone cover occur elastic deformation, the inner hole surface of locking cone cover is pressed tightly the outer surface of piston rod, thereby realizes the position locking of oil cylinder piston rod.

[0003] However, the structure of this external lock has the following defects inevitably:

[0004] The steel inner hole surface of locking cone cover contacts with the outer surface of piston rod, and the outer surface of piston rod is a sealing surface, the surface of piston rod should not be in hard contact with other components, but the steel inner hole surface of locking cone cover is easy to cause uneven stress with the outer surface of piston rod due to machining precision and use time, thereby causing damage to the outer surface of oil cylinder piston rod, and the strength of the outer surface of piston rod is limited, when the steel inner hole surface of locking cone cover has too much holding force on the piston rod, the outer surface of piston rod is easy to be pressed, so the size of the locking force of the lock is limited.

[0005] In addition, there is a probability that impurities in the external environment are attached to the surface of the piston rod during use, and these impurities will damage the outer surface of the piston rod once clamped by the steel inner hole surface of the locking cone cover, and the external lock and the oil cylinder are two separate products, which occupies a large assembly space, and is difficult to install or even cannot be installed and used in a space-limited environment.

[0006] Therefore, it is necessary to improve the structure of the existing oil cylinder and lock. SUMMARY

[0007] In view of the deficiencies in the prior art, the utility model aims at providing an oil cylinder with a built-in hydraulic lock, which does not require an additional hydraulic lock mounting seat, and the hydraulic lock does not occupy additional space, and the oil cylinder assembly has no requirements for the use environment, so that the oil cylinder with a built-in locking assembly can be used in a more harsh environment.

[0008] The above technical purpose of the utility model is achieved by the following technical scheme:

[0009] The oil cylinder with built-in hydraulic lock comprises an oil cylinder assembly and a locking assembly, the oil cylinder assembly comprises an oil cylinder piston and a cylinder barrel, an installation groove is arranged on one end of the oil cylinder piston in the cylinder barrel in the axial direction, the locking assembly is arranged in the cylinder barrel, the locking assembly comprises a taper head rod, an expansion sleeve rod and a locking mechanism, the taper head rod penetrates the expansion sleeve rod, one end of the taper head rod is provided with an expansion taper head, one end of the expansion sleeve rod is an expansion port matched with the expansion taper head, the end of the expansion sleeve rod provided with the expansion port extends into the installation groove of the oil cylinder piston, the other end of the expansion sleeve rod is fixedly connected with the inner wall of the cylinder barrel, the inner wall of the cylinder barrel connected with the expansion sleeve rod is further provided with a locking cavity, the end of the taper head rod away from the expansion taper head penetrates the inner wall of the cylinder barrel and extends into the locking cavity, and a piston piece is arranged on the end of the taper head rod in the locking cavity, the surface of the piston piece away from the taper head rod forms a loosening oil cavity with the inner wall of the locking cavity, the cylinder barrel is provided with an oil channel in communication with the loosening oil cavity, and the locking mechanism is arranged between the end of the taper head rod extending into the locking cavity and the piston piece.

[0010] In one of the embodiments, the locking mechanism comprises a spring, the spring is sleeved on the end of the taper head rod in the locking cavity, and the two ends of the spring are respectively abutted with the inner wall of the locking cavity and the piston piece, and the side surface of the cylinder barrel is provided with a communication port in communication with the spring.

[0011] In one of the embodiments, the locking mechanism comprises an oil pump, the end of the taper head rod in the locking cavity and the locking cavity form an expansion oil cavity, the side surface of the cylinder barrel is provided with a communication port in communication with the expansion oil cavity, and the oil pump is connected with the expansion oil cavity through the communication port.

[0012] In one of the embodiments, the expansion oil cavity is also provided with a spring.

[0013] In one of the embodiments, the cylinder barrel is further provided with a first proximity switch for detecting the position of the piston piece to detect the loosening state of the locking assembly.

[0014] In one of the embodiments, the cylinder barrel is further provided with a second proximity switch for detecting the position of the piston piece to detect the locking state of the locking assembly.

[0015] In one of the embodiments, the end of the oil cylinder piston is provided with a first connecting piece, the end of the cylinder barrel is provided with a second connecting piece, and the oil cylinder assembly is connected with external equipment through the first connecting piece and the second connecting piece.

[0016] In conclusion, the utility model has the following beneficial effects:

[0017] The hydraulic locker of the utility model is the locking assembly, which no longer locks the outer surface of the oil cylinder piston, but locks the inner wall of the oil cylinder piston, the taper head rod and the expansion sleeve rod of the locking assembly are combined and placed in the mounting groove of the oil cylinder piston, the inner wall of the oil cylinder piston can adopt various reinforcing and hardening measures, so that it can bear greater expansion force, even if there is local damage, it does not affect the normal work of the oil cylinder, so that greater locking force can be obtained.

[0018] In addition, since the locking assembly is built in the oil cylinder piston, no additional hydraulic locker mounting seat is needed, the hydraulic locker does not occupy additional space, and the oil cylinder assembly has no requirement for the use environment, so that the oil cylinder with the built-in locking assembly can be used in a more severe environment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the schematic view of the utility model.

[0020] In the figure: 1, cylinder barrel, 2, oil cylinder piston, 3, taper head rod, 4, expansion sleeve rod, 5, mounting groove, 6, communication port, 7, oil path, 8, first proximity switch, 9, second proximity switch, 10, spring, 11, expansion taper head, 12, expansion port. DETAILED DESCRIPTION

[0021] The utility model is described in detail below in combination with the drawings and examples.

[0022] It is worth noting that the orientation words such as 'up' and 'down' involved in this paper are relative to the view angle of the drawings, and are only for the convenience of description, and cannot be understood as the limitation of the technical scheme.

[0023] The utility model discloses an oil cylinder with built-in hydraulic locker, which comprises an oil cylinder assembly and a locking assembly, the oil cylinder assembly comprises an oil cylinder piston 2 and a cylinder barrel 1, an installation groove 5 is arranged on one end of the oil cylinder piston 2 in the cylinder barrel 1 along the axial direction, the locking assembly is arranged in the cylinder barrel 1, the locking assembly comprises a taper head rod 3, an expansion sleeve rod 4 and a locking mechanism, the taper head rod 3 penetrates through the expansion sleeve rod 4, one end of the taper head rod 3 is provided with an expansion taper head 11, one end of the expansion sleeve rod 4 is an expansion port 12 matched with the expansion taper head 11, one end of the expansion sleeve rod 4 provided with the expansion port 12 extends into the installation groove 5 of the oil cylinder piston 2, the other end of the expansion sleeve rod 4 is fixedly connected with the inner wall of the cylinder barrel 1, the inner wall of the cylinder barrel 1 connected with the expansion sleeve rod 4 is further provided with a locking cavity, one end of the taper head rod 3 away from the expansion taper head 11 penetrates through the inner wall of the cylinder barrel 1 and extends into the locking cavity, and one end of the taper head rod 3 in the locking cavity is provided with a piston piece, one side of the piston piece away from the taper head rod 3 forms a loosening oil cavity with the inner wall of the locking cavity, the cylinder barrel 1 is provided with an oil path 7 communicated with the loosening oil cavity, and the locking mechanism is arranged between the end of the taper head rod 3 extending into the locking cavity and the piston piece.

[0024] As Figure 1 shown in the utility model, the expansion sleeve rod 4 is fixedly connected with the cylinder 1 to form a whole, the oil cylinder piston 2 can move relative to the expansion sleeve rod 4, the taper head rod 3 penetrates the expansion sleeve rod 4, and the two can also move relative to each other, when the oil cylinder piston 2 is not locked by the locking assembly, when the rod cavity of the cylinder 1 is not communicated with hydraulic oil, the oil cylinder piston 2 is retracted, and when the rodless cavity of the cylinder 1 is communicated with hydraulic oil, the oil cylinder piston 2 is extended. Figure 1 The cavity on the left side of the cylinder 1 is communicated with hydraulic oil, the oil cylinder piston 2 is retracted, and the cavity on the right side of the cylinder 1 is communicated with hydraulic oil. Figure 1 The cavity on the left side of the cylinder 1 is communicated with hydraulic oil, the oil cylinder piston 2 is retracted, and the cavity on the right side of the cylinder 1 is communicated with hydraulic oil.

[0025] The working principle of the utility model is as follows: when the oil cavity is not communicated with hydraulic oil, under the action of the locking mechanism, the taper head rod 3 moves to the locking cavity direction, the expansion taper head 11 of the taper head rod 3 is pressed to the expansion sleeve 4, the expansion sleeve 4 is expanded at the expansion port 12 position, is contacted with the inner wall of the oil cylinder piston 2, and the two are locked by expansion, at this time, the oil cylinder piston 2 of the oil cylinder assembly cannot move any more; after the oil cavity is communicated with hydraulic oil, the hydraulic oil pushes the taper head rod 3 to move, so that the taper head rod 3 is loosened with the expansion sleeve rod 4, at this time, the oil cylinder piston 2 restores the moving function.

[0026] It is easy to understand that in the utility model, the matching principle between the taper head rod 3 and the expansion sleeve rod 4 is similar to the principle of the existing locking device, when the expansion taper head 11 of the taper head rod 3 applies pressure to the expansion port 12 of the expansion sleeve rod 4, part of the expansion port 12 position of the expansion sleeve rod 4 is expanded, so that the purpose of locking the oil cylinder piston 2 is achieved.

[0027] Further, as Figure 1 shown, the locking mechanism comprises a spring 10, the spring 10 is sleeved on one end of the taper head rod 3 in the locking cavity, and the two ends of the spring 10 are respectively abutted with the inner wall of the locking cavity and the piston piece, and the cylinder 1 side is provided with a communication port 6 in communication with the spring 10. When the oil cylinder is not communicated with hydraulic oil, the spring 10 will apply a pushing force to the piston piece, the taper head rod 3 moves to the locking cavity direction, after the oil cylinder is communicated with hydraulic oil, the hydraulic oil pushes the piston piece, so that the spring 10 is compressed, and the communication port 6 plays a role of exhaust.

[0028] Further, the locking mechanism comprises an oil pump, not shown in the drawing, one end of the taper head rod 3 in the locking cavity and the locking cavity form an expansion oil cavity, the side of the cylinder 1 is provided with a communication port 6 in communication with the expansion oil cavity, and the oil pump is connected with the expansion oil cavity through the communication port 6. When the oil cylinder is not communicated with hydraulic oil, the oil pump communicates hydraulic oil into the expansion oil cavity, pushes the piston piece to move, and locks the oil cylinder piston 2, when the oil cylinder is communicated with hydraulic oil, the expansion oil cavity discharges hydraulic oil through the communication port 6, and the hydraulic oil pushes the piston piece to loosen the oil cylinder piston 2.

[0029] As can be easily understood, no matter whether the locking mechanism is the spring 10 or the oil pump, the locking chamber is divided into left and right parts by the piston member, as shown in the drawings, Figure 1 The locking mechanism affects the left cavity of the locking chamber and pushes the piston member to move rightward to achieve the purpose of locking the oil cylinder piston 2.

[0030] In the left cavity of the locking chamber, only the spring 10 can be arranged, or only the hydraulic oil is introduced through the oil pump, or both of them are used in cooperation to achieve the effect of rapid starting.

[0031] Further, the cylinder barrel 1 is further provided with a first proximity switch 8 for detecting the position of the piston member to detect the unlocking state of the locking assembly. Figure 1 As shown in the drawings, the first proximity switch 8 detects whether the piston member moves to the position when moving leftward, and thus the first proximity switch 8 is arranged outside the position of the piston member when moving to the unlocking state in the direction of the locking mechanism to detect whether the piston member moves to the position.

[0032] Further, the cylinder barrel 1 is further provided with a second proximity switch 9 for detecting the position of the piston member to detect the locking state of the locking assembly. Figure 1 As shown in the drawings, the second proximity switch 9 detects whether the piston member moves to the position when moving rightward, and thus the second proximity switch 9 is arranged outside the position of the piston member when moving to the locking state in the direction away from the locking mechanism to detect whether the piston member moves to the position.

[0033] The first proximity switch 8 and the second proximity switch 9 are conventional sensors for detecting the position of the piston member, and thus the utility model will not be described in detail.

[0034] Further, the end of the oil cylinder piston 2 is provided with a first connecting member, the end of the cylinder barrel 1 is provided with a second connecting member, and the oil cylinder assembly is connected with external equipment through the first connecting member and the second connecting member.

[0035] In the utility model, the positions needing to be sealed in the oil cylinder assembly and the locking assembly are all provided with sealing members, which is a conventional setting in the field, and thus the utility model will not be described in detail.

[0036] The hydraulic locker, i.e. the locking assembly, of the utility model does not lock the outer surface of the oil cylinder piston 2, but locks the inner wall of the oil cylinder piston 2, the taper head rod 3 and the expansion sleeve rod 4 of the locking assembly are combined and placed in the mounting groove 5 of the oil cylinder piston 2, and the inner wall of the oil cylinder piston 2 can adopt various measures for strengthening and hardening, so that it can bear greater expansion force, even if there is local damage, it also does not affect the normal work of the oil cylinder, and thus greater locking force can be obtained.

[0037] In addition, since the locking assembly is built in the oil cylinder piston 2, no additional hydraulic locker mounting seat is needed, the hydraulic locker does not occupy additional space, and the oil cylinder assembly has no requirement for the use environment, so that the oil cylinder with the built-in locking assembly can be used in a more severe environment.

[0038] The preferred embodiments of the present application have been described above, the protection scope of the present application is not limited to the above-mentioned embodiments, any technical scheme falling within the idea of the present application belongs to the protection scope of the present application. It should be noted that for ordinary skilled in the art, some improvements and decorations without departing from the principles of the present application can also be considered as the protection scope of the present application.

Claims

1. A hydraulic cylinder with built-in hydraulic lock, characterized in that, The application relates to a hydraulic cylinder assembly and a locking assembly, wherein the hydraulic cylinder assembly comprises a cylinder piston (2) and a cylinder barrel (1), the cylinder piston (2) is provided with an installation groove (5) at one end in the cylinder barrel (1) in the axial direction, the locking assembly is arranged in the cylinder barrel (1), the locking assembly comprises a taper head rod (3), an expansion sleeve rod (4) and a locking mechanism, the taper head rod (3) penetrates the expansion sleeve rod (4), one end of the taper head rod (3) is provided with an expansion taper head (11), one end of the expansion sleeve rod (4) is an expansion opening (12) matched with the expansion taper head (11), the end of the expansion sleeve rod (4) provided with the expansion opening (12) extends into the installation groove (5) of the cylinder piston (2), the other end of the expansion sleeve rod (4) is fixedly connected with the inner wall of the cylinder barrel (1), the inner wall of the cylinder barrel (1) connected with the expansion sleeve rod (4) is further provided with a locking cavity, the end of the taper head rod (3) away from the expansion taper head (11) penetrates the inner wall of the cylinder barrel (1) and extends into the locking cavity, and a piston piece is arranged at the end of the taper head rod (3) in the locking cavity, the side of the piston piece away from the taper head rod (3) forms a loosening oil cavity with the inner wall of the locking cavity, the cylinder barrel (1) is provided with an oil channel (7) in communication with the loosening oil cavity, and the locking mechanism is arranged between the end of the taper head rod (3) extending into the locking cavity and the piston piece.

2. The hydraulic lock built-in cylinder according to claim 1, wherein The locking mechanism comprises a spring (10), the spring (10) is sleeved on the end of the taper head rod (3) in the locking cavity, and the two ends of the spring (10) respectively abut against the inner wall of the locking cavity and the piston piece, and the side surface of the cylinder barrel (1) is provided with a communication opening (6) in communication with the spring (10).

3. The hydraulic lock built-in cylinder according to claim 1, wherein The locking mechanism comprises an oil pump, the end of the taper head rod (3) in the locking cavity and the locking cavity form an expansion oil cavity, the side surface of the cylinder barrel (1) is provided with a communication opening (6) in communication with the expansion oil cavity, and the oil pump is connected with the expansion oil cavity through the communication opening (6).

4. The hydraulic lock built-in cylinder according to claim 3, wherein The expansion oil cavity is also provided with a spring (10).

5. The hydraulic lock cylinder built-in according to any one of claims 1 to 4, wherein The cylinder barrel (1) is further provided with a first proximity switch (8) for detecting the position of the piston piece, so as to detect the loosening state of the locking assembly.

6. The hydraulic lock built-in cylinder according to claim 5, wherein The cylinder barrel (1) is further provided with a second proximity switch (9) for detecting the position of the piston piece, so as to detect the locking state of the locking assembly.

7. The hydraulic lock built-in cylinder according to claim 1, wherein The end of the cylinder piston (2) is provided with a first connecting piece, the end of the cylinder barrel (1) is provided with a second connecting piece, and the hydraulic cylinder assembly is connected with external equipment through the first connecting piece and the second connecting piece.

Images