CN203223434U - Stroke adjustment mechanism provided with mechanical lock device - Google Patents

Abstract

The utility model provides a stroke adjustment mechanism with a mechanical locking device, which adopts an inner protection sleeve and an outer protection sleeve provided with a pin seat plate combined with a locking pin, and relies on a hydraulic system to work during the movement of the piston rod of a hydraulic oil cylinder. Once the piston rod of the hydraulic cylinder moves to the predetermined position to meet the stroke requirements, the piston rod of the hydraulic cylinder and the outer protective sleeve are locked together by the mechanical locking device-lock pin, and the hydraulic stroke is fixed without the participation of the hydraulic valve. Locking, the working pressure in the hydraulic cylinder is released, and there will be no hydraulic oil leakage and hydraulic system component damage, which greatly improves the service life of the hydraulic system. It is used in occasions that require stroke adjustment and withstand long-term impact loads.

Description

Stroke adjustment mechanism with mechanical locking device

technical field

The utility model relates to a stroke adjustment mechanism, in particular to a stroke adjustment mechanism with a mechanical locking device.

Background technique

The stroke adjustment mechanism is widely used in engineering machinery, machine tool equipment, automobile manufacturing, metallurgy and mining, aerospace and other industrial products. The hydraulic stroke adjustment mechanism is usually locked by the hydraulic valve in the hydraulic system. However, when the load works for a long time and there is an impact load, the hydraulic valve locks the hydraulic cylinder to withstand the impact load for a long time, and the working pressure in the hydraulic cylinder is high, which is likely to cause hydraulic oil leakage and damage to hydraulic system components, reducing the service life of the hydraulic system.

Utility model content

The purpose of the utility model is to overcome the disadvantages that the current hydraulic stroke adjustment mechanism adopts hydraulic valve locking, which easily causes hydraulic oil leakage and damage to hydraulic system components, thereby reducing the service life of the hydraulic system.

For realizing above object, the technical scheme of the present utility model is as follows:

A stroke adjustment mechanism with a mechanical locking device is provided, including a hydraulic cylinder, an inner protective sleeve, an outer protective sleeve and a locking pin, and the piston rod of the hydraulic cylinder passes through the piston rod positioning pin and the inner protective sleeve. Fixed connection, the steel barrel of the hydraulic cylinder is fixedly connected with the outer protective sleeve through the positioning pin of the steel barrel, the hydraulic cylinder and the inner protective sleeve are arranged inside the outer protective sleeve in sequence and the axis lines of the three coincide, and the inner protective sleeve The outer wall of the barrel is axially perpendicular to the outer wall and is provided with a pin seat plate 1 with a plurality of holes. The outer wall of the outer protective sleeve is axially perpendicular to the outer wall and is parallel to the outer wall. Two pin seat plates 2 with a hole are provided. The pin seat plate 1 Located between two pin seat plates 2 and the three are parallel, the diameters of the holes on pin seat plate 1 and pin seat plate 2 are equal, and the centers of multiple holes on pin seat plate 1 are located on a line parallel to the axis of the outer protective sleeve line, and the radial distance between the straight line and the axis of the outer protective sleeve is equal to the radial distance from the center of the second hole on the pin seat plate to the axis of the outer protective sleeve. When the hydraulic cylinder When the piston rod moves to the predetermined position, the locking pin passes through the hole on one of the pin seat plates 2, the hole on the pin seat plate 1 and the hole on the other pin seat plate 2 in order to connect the inner protective sleeve and the outer protective sleeve. The cylinder is fixed together; the sealing end of the inner protection sleeve and the sealing end of the outer protection sleeve are provided with ear plates for installing devices that need to change the stroke.

Nylon blocks are provided on the outer wall of the end of the opening side of the inner protection sleeve and the inner wall of the end of the opening side of the outer protection sleeve. The inner protection sleeve contacts the inner wall of the outer protection sleeve through the nylon block, and the outer protection sleeve The nylon block is in contact with the outer wall of the inner protective sleeve.

The outer protective sleeve wall is provided with an oil cup, and the outer contact surface of the nylon block is provided with an oil groove, and there is lubricating grease injected through the oil cup in the oil groove.

The utility model adopts the combination of the inner protection sleeve and the outer protection sleeve provided with the pin seat plate and the lock pin, and relies on the hydraulic system to work during the movement of the piston rod of the hydraulic oil cylinder, and once the piston rod of the hydraulic oil cylinder moves to the predetermined position and reaches the stroke When required, the piston rod of the hydraulic cylinder and the outer protective sleeve are locked together by the mechanical locking device - the locking pin, the hydraulic stroke is fixed, and the hydraulic valve is not required to participate in the locking, and the working pressure in the hydraulic cylinder is released. Leakage of hydraulic oil and damage to hydraulic system components will occur, which greatly improves the service life of the hydraulic system. It is used in occasions that require stroke adjustment and withstand long-term impact loads.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic diagram of the structure of the inner protective sleeve.

Fig. 3 is a sectional view along A-A in Fig. 2 .

Fig. 4 is a sectional view along B-B in Fig. 2 .

Fig. 5 is a schematic diagram of the structure of the outer protective sleeve.

Fig. 6 is a sectional view along A-A in Fig. 5 .

Fig. 7 is a cross-sectional view along B-B in Fig. 5 .

In the figure: 1. Outer protective sleeve, 2. Cylinder barrel positioning pin, 3. Flat washer, 4. Cotter nut, 5. Cotter pin, 6. Hydraulic cylinder, 7. Piston rod positioning pin, 8. Inner protective sleeve , 9. Locking pin, 10. Ear plate of inner protective sleeve, 11. Sealing plate of inner protective sleeve, 12. Wall of inner protective sleeve, 13. Nylon block of inner protective sleeve, 14. Hexagon socket bolt 1, 15 1. Pin seat plate 1, 16. Ear plate of outer protective sleeve, 17. Sealing plate of outer protective sleeve, 18. Wall of outer protective sleeve, 19. Nylon block of outer protective sleeve, 20. Hexagon socket bolt 2, 21, Pin seat plate two.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described:

Fig. 1 is a structural diagram of the utility model, the piston rod of the hydraulic cylinder 6 is fixedly connected with the inner protective sleeve 8 through the piston rod locating pin 7, and the steel drum of the hydraulic cylinder 6 is connected through the steel drum locating pin 2, the flat washer 3, and the split nut 4 The cotter pin 5 is fixedly connected with the outer protective sleeve 1, the hydraulic cylinder 6 and the inner protective sleeve 8 are sequentially arranged inside the outer protective sleeve 1 and the axis lines of the three coincide, and the outer wall of the inner protective sleeve 8 is axially Perpendicular to the outer wall is provided with a pin seat plate 1 15 with a plurality of holes, and the outer wall of the outer protection sleeve 1 is axially perpendicular to the outer wall and is provided with two pin seat plates 2 21 with a hole, and the pin seat plate 1 15 Located between the two pin seat plates 21 and the three are parallel, the diameters of the holes on the pin seat plate 15 and the pin seat plate 2 21 are equal, and the centers of the holes on the pin seat plate 1 15 are located on a line parallel to the outer protection On the straight line of the axis line of the sleeve 1, and the radial distance between the line and the axis line of the outer protection sleeve 1 and the diameter from the hole center of the hole on the pin seat plate 2 21 to the axis line of the outer protection sleeve 1 When the hydraulic cylinder 6 is started, the inner protection sleeve 8 moves together with the piston rod of the hydraulic cylinder 6. When the piston rod of the hydraulic cylinder 6 moves to a predetermined position, the locking pin 9 is inserted into the inner and outer protection sleeves. The pin seat plates 1 and 2 15, 21 of the cylinder 8, 1 fix the relative positions of the inner and outer protection sleeves 8, 1, so as to realize the two-way locking of the hydraulic cylinder 6 and improve the force bearing mode of the hydraulic cylinder 6. Protect the hydraulic oil cylinder 6 when the mechanical device moves. The inner and outer protective sleeves are respectively welded with lug plates 10,16, which are used to install devices that need to change the stroke, and are welded to the inner and outer protective sleeve walls 12,18 by the sealing plates 11,17 respectively.

Nylon block 13 is equipped with on the outer wall of inner protection sleeve 8 opening one side end by hexagon socket bolt 14, and nylon block 19 is equipped with by inner hexagon bolt 2 20 on the inner wall of outer protection sleeve 1 opening side end, and inner protection sleeve The cylinder 8 is in contact with the inner wall of the outer protective sleeve 1 through the nylon block 13 , and the outer protective sleeve 1 is in contact with the outer wall of the inner protective sleeve 8 through the nylon block 19 . The outer protective sleeve wall 18 is provided with an oil cup, and the outer contact surface of the nylon block has an oil groove, which can inject lubricating grease from the oil cup to the oil groove to reduce the frictional resistance of the inner and outer protective sleeves 8,1 during relative motion.

Claims (3)

1. A stroke adjustment mechanism with a mechanical locking device, comprising a hydraulic cylinder, characterized in that: It also includes an inner protective sleeve, an outer protective sleeve and a locking pin. The piston rod of the hydraulic cylinder is fixedly connected with the inner protective sleeve through the piston rod positioning pin, and the steel barrel of the hydraulic cylinder is connected to the outer protective sleeve through the steel barrel positioning pin. The cylinder is fixedly connected, the hydraulic cylinder and the inner protective sleeve are arranged inside the outer protective sleeve in sequence and the axis lines of the three coincide, and the outer wall of the inner protective sleeve is axially perpendicular to the outer wall. There is a pin with multiple holes. Seat plate 1, the outer wall of the outer protection sleeve is axially perpendicular to the outer wall and is provided with two pin seat plates 2 with a hole, the pin seat plate 1 is located between the two pin seat plates 2 and the three are parallel, the pin seat plate The diameters of the holes on the first and second pin seat plates are equal, and the centers of the holes on the first pin seat plate are located on a straight line parallel to the axis line of the outer protection sleeve, and the distance between the line and the axis line of the outer protection sleeve The radial distance between them is equal to the radial distance from the hole center of the second upper hole of the pin seat plate to the axis line of the outer protective sleeve. When the piston rod of the hydraulic cylinder moves to the predetermined position, the locking pin passes through one of the pins in turn. The hole on the seat plate 2, the hole on the pin seat plate 1 and the hole on the other pin seat plate 2 fix the inner protective sleeve and the outer protective sleeve together; the sealing end of the inner protective sleeve is sealed with the outer protective sleeve Both ends are equipped with ear plates for installing devices that need to change the stroke. 2. The stroke adjustment mechanism with mechanical locking device according to claim 1, characterized in that: the outer wall of the end of the opening side of the inner protection sleeve and the inner wall of the end of the opening side of the outer protection sleeve are provided with The nylon block, the inner protective sleeve is in contact with the inner wall of the outer protective sleeve through the nylon block, and the outer protective sleeve is in contact with the outer wall of the inner protective sleeve through the nylon block. 3. The stroke adjustment mechanism with mechanical locking device as claimed in claim 2, characterized in that: the outer protective sleeve wall is provided with an oil cup, and the outer contact surface of the nylon block is provided with an oil groove, and in the oil groove There is lubricating grease injected through the oil cup.

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