A double rack swing cylinder

Abstract

The present invention relates to the technical field related to swing cylinders, and discloses a double-rack swing cylinder, comprising four cylinder bottoms, four cylinder bodies, hexagon socket screws, four flanges, a box body, two racks and gears, four ports are provided on the left and right sides of the box body, the left and right sides of the box body are respectively connected to the four cylinder bodies through four flanges, O-rings are installed on the inner sides of the ports on the left and right sides of the box body, the annular inner wall of the O-ring is in contact with the annular outer wall of the corresponding cylinder body, the four flanges are respectively fixedly connected to the box body through hexagon socket screws, the ends of the four cylinder bodies are fixedly installed with cylinder bottoms, and the inner cavity of the box body is installed with two tapered roller bearings. The double-rack swing cylinder is interconnected through the oil holes arranged on the front of the box body, which increases the stability of the high-pressure fluid circulation, reduces the length of the external oil pipe, increases the aesthetics of the equipment installation and use, and reduces the space occupied by the equipment in the workshop environment.

Description

Technical Field

[0001] The invention relates to the technical field related to a swing cylinder, and in particular to a double-rack swing cylinder. Background Art

[0002] The hydraulic cylinder is a tightly assembled accessory that uses hydraulic pressure to gather very high torque in a very small space. The principle of the swing cylinder is to convert the reciprocating motion of the hydraulic cylinder into the forward and reverse swing rotation of the gear shaft through the rack to drive the gear, and at the same time convert the thrust of the reciprocating cylinder into the output torque of the gear shaft. Since the swing angle of the gear shaft is proportional to the length of the rack, the swing angle of the gear shaft can be selected arbitrarily and can be greater than 360°. The double-rack swing cylinder is generally connected to each other through multiple oil pipes to transport hydraulic fluid, and the oil pipes are generally arranged on the outside of the equipment for fixed arrangement. When the swing cylinder is installed and used, the setting of multiple oil pipes increases the space occupied by the equipment installation, especially the connecting parts between the multiple oil pipes are prone to leakage when they are subjected to different high-pressure fluids for a long time. At the same time, the external oil pipes are prone to corrosion or damage, which shortens the maintenance cycle of the equipment. Therefore, the inventor designed a double-rack swing cylinder to reduce the inconvenience caused by the external oil pipes. Summary of the invention

[0003] 1. Technical issues to be resolved

[0004] In view of the deficiencies in the prior art, the present invention provides a double-rack swing cylinder, which solves the problem of corrosion damage caused by externally placed oil pipes of the swing cylinder and shortened equipment maintenance cycle.

[0005] (II) Technical solution

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-rack swing oil cylinder, comprising four cylinder bottoms, four cylinder bodies, hexagon socket screws, four flanges, a box body, two racks and gears, four ports are opened on the left and right sides of the box body, and the left and right sides of the box body are respectively connected to the four cylinder bodies through four flanges, and O-rings are installed on the inner sides of the ports on the left and right sides of the box body, and the annular inner wall of the O-ring is in contact with the annular outer wall of the corresponding cylinder body. The four flanges are fixedly connected to the box body through hexagon socket screws, and the ends of the four cylinder bodies are fixedly installed with cylinder bottoms, and two tapered roller bearings are installed in the inner cavity of the box body, and the gear is fixedly installed between the inner rings of the two tapered roller bearings, and a pressure cover is fixedly installed on the front side of the box body, and a dustproof cover is installed on the inner side of the pressure cover. Ring, the annular inner wall of the dust ring contacts the outer ring of the gear, a pressure cover 2 is fixedly installed on the rear side of the box body, an O-ring 3 is installed on the inner side of the pressure cover 2, the annular inner wall of the O-ring 3 contacts the outer ring of the gear, the four cylinder bodies correspond to each other in pairs, a rack is arranged between the two corresponding cylinder bodies, the two racks are meshed with the gears, the rack runs through the inner side of the box body horizontally, the left and right ends of the rack are respectively inserted into the inner cavity of the corresponding cylinder body, the left and right ends of the two racks are fixedly connected with pistons through hexagon socket tip set screws, the left and right ends of the two racks are interspersed with O-ring 2, the O-ring 2 contacts the annular inner wall of the corresponding piston, the four pistons are fixedly sleeved with a combined sealing ring for holes, and the outer side wall of the combined sealing ring for holes contacts the inner side wall of the corresponding cylinder body.

[0007] An upper left oil hole and a lower left oil hole are provided on the left side of the box body, a lower right oil hole and an upper right oil hole are provided on the right side of the box body, a left closed oil hole and a right closed oil hole are provided on the bottom front side of the box body, and an oil guide hole 1 and an oil guide hole 2 are provided on the front side of the box body, the oil guide hole 1 is connected with the upper left oil hole, the oil guide hole 2 is connected with the upper right oil hole, the lower right oil hole is connected with the left closed oil hole, the left closed oil hole is connected with the upper left oil hole, the lower left oil hole is connected with the right closed oil hole, and the right closed oil hole is connected with the upper right oil hole.

[0008] The four cylinder bottoms are respectively connected with the corresponding upper left oil hole, lower left oil hole, upper right oil hole and lower right oil hole through oil pipes.

[0009] Preferably, the hole combined sealing ring, O-ring 1, O-ring 2 and O-ring 3 can be made of Merkel from Germany, and the applicable temperature is -30-80 degrees Celsius.

[0010] Preferably, the opening ends of the right closed oil hole and the left closed oil hole are blocked by electric welding, the lower right oil hole and the right closed oil hole are staggered, and the lower left oil hole and the left closed oil hole are staggered.

[0011] Preferably, the tooth pitch and module of the two racks are equal, and the two racks and the gear can perform synchronous meshing motion.

[0012] Preferably, the two corresponding pistons are symmetrically arranged about the corresponding racks, and the annular outer side wall of the rack matches the inner diameter of the inner side wall of the corresponding cylinder port.

[0013] Preferably, the centers of the tapered roller bearing, the gear and the housing are on the same longitudinal axis.

[0014] Preferably, the oil guide hole and the oil guide hole are not connected to the inner cavity of the box body, the oil guide hole 1 is located in the inner layer of the front surface of the box body, and the oil guide hole 2 is located in the outer layer of the front surface of the box body.

[0015] (III) Beneficial effects

[0016] The present invention provides a double-rack swing cylinder. It has the following beneficial effects:

[0017] (1) The double-rack swing cylinder cooperates with a box body, a cylinder body, a cylinder bottom and an oil pipe. When the equipment is in use, the oil pipe connects the upper left oil hole, the lower left oil hole, the lower right oil hole and the upper right oil hole on the cylinder bottom and the box body, which changes the traditional external oil pipe arrangement of the double-rack swing cylinder, avoids leakage caused by the oil pipes being connected to each other through multi-way joints, and the oil holes arranged on the front side of the box body are connected to each other, which increases the stability of the high-pressure fluid flow, extends the service life of the equipment, and at the same time extends the maintenance period of the equipment, and also reduces the length of the external oil pipe, increases the aesthetics of the equipment installation and use, and reduces the space occupied by the equipment in the workshop environment.

[0018] (2) The double-rack swing cylinder is connected to each other by arranging the upper left oil hole, the lower left oil hole, the lower right oil hole, the upper right oil hole, the second oil guide hole and the first oil guide hole, so that the hydraulic fluid flows in the interconnected cavities. The box body effectively absorbs the heat generated by the fluid extrusion, thereby ensuring the fluid temperature when the equipment is used for a long time, extending the single continuous use time of the equipment, and shortening the length of the oil pipe setting, which can effectively ensure the safety of the pipeline on the hydraulic equipment when it is subjected to instantaneous fluid extrusion, effectively avoiding the occurrence of pipe bursting and preventing foreign objects from scratching the pipeline and causing damage to the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the present invention;

[0021] Figure 3 It is a side view structural schematic diagram of the present invention;

[0022] Figure 4 It is a top view schematic diagram of the present invention;

[0023] Figure 5 It is a schematic diagram of the rack structure of the present invention;

[0024] Figure 6 It is a schematic diagram of the piston of the present invention;

[0025] Figure 7 This is a front schematic diagram of the box body of the present invention;

[0026] Figure 8 It is a schematic side view of the box body of the present invention;

[0027] Fig. 9 This is a schematic diagram of the back side of the box body of the present invention;

[0028] Fig.10 It is a schematic diagram of the gear structure of the present invention.

[0029] In the figure: 1 cylinder bottom, 2 cylinder body, 3 hexagon socket screw, 4 flange, 5 housing, 6 rack, 7 O-ring 1, 8 O-ring 2, 9 combined sealing ring for hole, 10 hexagon socket tip set screw, 11 piston, 12 gland 1, 13 dust ring, 14 tapered roller bearing, 15 gland 2, 16 gear, 17 O-ring 3, 18 upper left oil hole, 19 lower right oil hole, 20 upper right oil hole, 21 lower left oil hole, 22 oil guide hole 1, 23 oil guide hole 2, 24 oil pipe. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1-10As shown, the present invention provides a technical solution: a double-rack swing cylinder, comprising four cylinder bottoms 1, four cylinder bodies 2, hexagon socket screws 3, four flanges 4, a box body 5, two racks 6 and a gear 16, four ports are opened on the left and right sides of the box body 5, and the left and right sides of the box body 5 are respectively connected to the four cylinder bodies 2 through four flanges 4, and the inner sides of the ports on the left and right sides of the box body 5 are installed with O-rings 7, and the annular inner walls of the O-rings 7 are in contact with the corresponding annular outer walls of the cylinder bodies 2, and the four flanges 4 are fixedly connected to the box body 5 through the hexagon socket screws 3, and the ends of the four cylinder bodies 2 are fixedly installed with cylinder bottoms 1, and the box body 5 Two tapered roller bearings 14 are installed in the inner cavity, and the gear 16 is fixedly installed between the inner rings of the two tapered roller bearings 14. The centers of the tapered roller bearings 14, the gear 16 and the housing 5 are on the same longitudinal axis. The pitch and module of the two racks 6 are equal. The two racks 6 and the gear 16 can perform synchronous meshing movement. A pressure cover 12 is fixedly installed on the front side of the housing 5, and a dust ring 13 is installed on the inner side of the pressure cover 12. The dust ring 13 can isolate the tapered roller bearings 14 from the outside world to ensure the sealing of the inner cavity of the equipment and the outside world. The annular inner wall of the dust ring 13 contacts the outer ring of the gear 16. The rear of the housing 5 A pressure cover 15 is fixedly installed on the side, and an O-ring 3 17 is installed on the inner side of the pressure cover 15. The annular inner wall of the O-ring 3 17 is in contact with the outer ring of the gear 16. The four cylinder bodies 2 correspond to each other in pairs. A rack 6 is arranged between the two corresponding cylinder bodies 2. The two racks 6 are meshed with the gear 16. The rack 6 runs through the inner side of the box body 5 horizontally. The left and right ends of the rack 6 are respectively inserted into the inner cavity of the corresponding cylinder body 2. The left and right ends of the two racks 6 are fixedly connected with pistons 11 through hexagon socket tip set screws 10. The pistons 11 ensure the stability of the lateral movement of the rack 6 in the corresponding cylinder body 2. The two corresponding pistons 11 are about The corresponding racks 6 are symmetrically arranged, and the annular outer wall of the rack 6 matches the inner diameter of the inner wall of the corresponding cylinder 2 port. O-rings 2 8 are inserted into the left and right ends of the two racks 6, and the O-rings 2 8 are in contact with the annular inner wall of the corresponding piston 11. The four pistons 11 are fixedly sleeved with a combined sealing ring 9 for holes, and the outer wall of the combined sealing ring 9 for holes is in contact with the inner wall of the corresponding cylinder 2. The combined sealing ring 9 for holes, O-ring 1 7, O-ring 2 8 and O-ring 3 17 can be made of German Merkel, with an applicable temperature of -30-80 degrees Celsius, to ensure the sealing of the equipment under high pressure and high intensity use environment.

[0032] The left side of the box body 5 is provided with an upper left oil hole 18 and a lower left oil hole 21, the right side of the box body 5 is provided with a lower right oil hole 19 and an upper right oil hole 20, the bottom front side of the box body 5 is provided with a left closed oil hole and a right closed oil hole, the front side of the box body 5 is provided with an oil guide hole 1 22 and an oil guide hole 23, the oil guide hole 22 and the oil guide hole 23 are not connected to the inner cavity of the box body 5, the oil guide hole 1 22 is located in the inner layer of the front side of the box body 5, the oil guide hole 23 is located in the outer layer of the front side of the box body 5, and the oil guide hole 1 22 is connected to the upper left oil hole 1 8 is connected, the oil guide hole 23 is connected with the upper right oil hole 20, the lower right oil hole 19 is connected with the left closed oil hole, the left closed oil hole is connected with the upper left oil hole 18, the lower left oil hole 21 is connected with the right closed oil hole, and the right closed oil hole is connected with the upper right oil hole 20, the opening ends of the right closed oil hole and the left closed oil hole are blocked by electric welding, which changes the traditional oil plug sealing method to avoid leakage of hydraulic fluid, the lower right oil hole 19 and the right closed oil hole are staggered, and the lower left oil hole 21 and the left closed oil hole are staggered.

[0033] The four cylinder bottoms 1 are respectively connected to the corresponding upper left oil hole 18 , lower left oil hole 21 , upper right oil hole 20 and lower right oil hole 19 through oil pipes 24 .

[0034] The outer surface of the equipment is sprayed with paint. The sprayed paint is acid-resistant and salt-spray-resistant for outdoor use. The paint is black, with one bottom and two sides.

[0035] In summary, the oil pipe 24 interconnects the upper left oil hole 18, the lower left oil hole 21, the lower right oil hole 19 and the upper right oil hole 20 on the cylinder bottom 1 and the box body 5. When the equipment is in use, the equipment is connected to the motor, and the output shaft of the motor is connected to the inner ring of the gear 16 through a spline. The oil guide hole 1 22 and the oil guide hole 2 23 are respectively connected and installed with the equipment to be connected. Hydraulic fluid is injected into the cylinder body 2, and the output shaft of the motor drives the gear 16 to rotate, so that the gear 16 drives the two racks 6 to move laterally, and the two ends of the movable rack 6 squeeze and circulate the fluid in the cylinder body 2 through the corresponding pistons 11 respectively. The fluid in the upper left oil hole 18 and the lower right oil hole 19 is discharged or imported through the oil guide hole 1 22, and the fluid in the upper right oil hole 20 and the lower left oil hole 21 is discharged or imported through the oil guide hole 23.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprising a reference structure" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double rack swing cylinder, comprising four cylinder bottoms, four cylinder bodies, hexagon socket screws, four flanges, a box body, two racks and a gear, and four ports are opened on the left and right sides of the box body, characterized in that: The left and right sides of the box body are connected to the four cylinder bodies through four flanges respectively, and O-rings 1 are installed on the inner sides of the ports on the left and right sides of the box body, and the annular inner wall of O-ring 1 contacts the annular outer wall of the corresponding cylinder body. The four flanges are fixedly connected to the box body through hexagon socket screws respectively, and the ends of the four cylinder bodies are fixedly installed with cylinder bottoms, and the inner cavity of the box body is installed with two tapered roller bearings, and the gear is fixedly installed between the inner rings of the two tapered roller bearings, and the front side of the box body is fixedly installed with a pressure cover 1, and the inner side of the pressure cover 1 is installed with a dust ring, and the annular inner wall of the dust ring contacts the outer ring of the gear, and the rear side of the box body is fixedly installed with a pressure cover 2, and the inner side of the pressure cover 2 An O-ring three is installed, the annular inner wall of the O-ring three contacts the outer ring of the gear, the four cylinder bodies correspond to each other in pairs, a rack is arranged between the two corresponding cylinder bodies, the two racks are meshed with the gears, the racks run through the inner side of the box body horizontally, the left and right ends of the racks are respectively inserted into the inner cavity of the corresponding cylinder bodies, the left and right ends of the two racks are fixedly connected with pistons through hexagon socket tip set screws, the left and right ends of the two racks are inserted with O-ring two, the O-ring two contacts the annular inner wall of the corresponding piston, the four pistons are fixedly sleeved with a hole combination sealing ring, and the outer side wall of the hole combination sealing ring contacts the inner side wall of the corresponding cylinder body; The left side of the box body is provided with an upper left oil hole and a lower left oil hole, the right side of the box body is provided with a lower right oil hole and an upper right oil hole, the bottom front side of the box body is provided with a left closed oil hole and a right closed oil hole, the front side of the box body is provided with an oil guide hole 1 and an oil guide hole 2, the oil guide hole 1 is connected with the upper left oil hole, the oil guide hole 2 is connected with the upper right oil hole, the lower right oil hole is connected with the left closed oil hole, the left closed oil hole is connected with the upper left oil hole, the lower left oil hole is connected with the right closed oil hole, and the right closed oil hole is connected with the upper right oil hole; The four cylinder bottoms are connected to the corresponding upper left oil hole, lower left oil hole, upper right oil hole and lower right oil hole through oil pipes respectively; The combined sealing ring for the hole, O-ring 1, O-ring 2 and O-ring 3 are made of Merkel from Germany, and the applicable temperature is -30-80 degrees Celsius; The opening ends of the right closed oil hole and the left closed oil hole are blocked by electric welding, the lower right oil hole and the right closed oil hole are staggered with each other, and the lower left oil hole and the left closed oil hole are staggered with each other.

2. A double rack swing cylinder according to claim 1, characterized in that: The tooth pitch and module of the two racks are equal, and the two racks and the gear can perform synchronous meshing motion.

3. The double rack swing cylinder according to claim 1, characterized in that: The two corresponding pistons are symmetrically arranged about the corresponding racks, and the annular outer side wall of the rack matches the inner diameter of the inner side wall of the corresponding cylinder port.

4. The double rack swing cylinder according to claim 1, characterized in that: The centers of the tapered roller bearing, gear and housing are on the same longitudinal axis.

5. The double rack swing cylinder according to claim 1, characterized in that: The first oil guide hole and the second oil guide hole are not connected with the inner cavity of the box body. The first oil guide hole is located at the inner layer of the front surface of the box body, and the second oil guide hole is located at the outer layer of the front surface of the box body.

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