CN211931242U - Tractor of changeable operating condition is with strong pressure lifting mechanism - Google Patents

Abstract

The utility model provides a changeable operating condition's tractor is with strong pressure lifting mechanism, including lifting mechanism main part and pivot, the pivot passes the lifting mechanism main part through the dead eye traversing of lifting mechanism main part both sides and rotates rather than being connected, it passes through the groove to have seted up the several second on the ring cover respectively, the second passes through the groove respectively with first groove position one-to-one and opening shape and size homogeneous phase, dog one side fixedly connected with spring respectively towards the center pin, the spring pass respectively the second that corresponds pass through the groove and with center pin periphery fixed connection, fix a position through elastic damping device between knob and the pivot. This pressure raiser can switch between connection status and operating condition, and this novel pressure raiser compares the tradition and has had pressure relief device's pressure raiser and reduced the oil leak risk, and operating condition switches more conveniently, only needs to twist and moves the rigid connection that the knob can throw off lifting arm and pivot, is fit for new-type small-size pressure raiser of effect and promotes.

Description

Tractor of changeable operating condition is with strong pressure lifting mechanism

Technical Field

The utility model belongs to strong pressure lifting mechanism manufacturing field, specifically speaking are changeable operating condition's strong pressure lifting mechanism for tractor.

Background

The strong pressure raiser is one of the common accessories of a traction tractor, the oil pump is driven by a tractor engine to pressurize a hydraulic cylinder by the strong pressure raiser, the hydraulic cylinder is utilized to push a connecting rod and a rotating shaft which are matched, thereby driving lifting arms at two sides to lift or fall, the lifting arms are used for connecting agricultural machinery which needs to be dragged, for most small-sized strong pressure raisers, the initial heights of connecting points of different agricultural machines and the lifting arms are different, users often need to rotate the lifting arms up and down to adjust the heights of the connecting points when installing the agricultural machines on the lifting arms, but because the rotating shafts of the lifting arms are connected with the hydraulic cylinder through a connecting rod structure, the strong pressure raiser needs to be provided with a special pressure relief device for the hydraulic cylinder so that the users can manually adjust the rotating angle of the lifting arms when connecting the agricultural implements, the pressure relief device on the hydraulic cylinder increases the manufacturing difficulty and the cost of the strong pressure raiser on the one hand, and simultaneously, the, for a small-sized forced pressure raiser which is low in cost, convenient to operate and reliable in structure, a new structure which can facilitate a user to connect an agricultural implement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a changeable operating condition's strong pressure lifting mechanism for tractor for solve the defect among the prior art.

The utility model discloses a following technical scheme realizes:

the utility model provides a changeable operating condition's strong pressure lifting mechanism for tractor, includes lifting mechanism main part and pivot, the pivot is connected with its rotation through the bearing hole traversing lifting mechanism main part of lifting mechanism main part both sides, and power device in the lifting mechanism main part is connected and drives the pivot rotation through articulated seat and pivot, characterized in that: circular grooves are respectively arranged at the circle center positions of the end surfaces at two sides of the rotating shaft, a plurality of first through grooves are respectively arranged on the annular inner walls of the circular grooves, central shafts are respectively and fixedly arranged at the circle center positions of the end surfaces in the grooves of the circular grooves, knobs are respectively and rotatably arranged at one ends of the central shafts, the gaps between the knobs and the corresponding end surfaces of the rotating shaft are 3-5 mm, ring sleeves are fixedly arranged at one sides of the rotating shafts, the ring sleeves are respectively inserted into annular grooves formed by the corresponding circular grooves and the central shafts, the peripheries of the ring sleeves are respectively in sliding fit with the annular inner walls of the corresponding circular grooves, lifting arms are respectively arranged at two sides of the periphery of the rotating shaft, through holes are respectively arranged at one ends of the lifting arms close to the rotating shaft, the lifting arms are respectively sleeved on the peripheries at two sides of the rotating shaft through holes, stop blocks are respectively arranged in, the dog is stretched into respectively towards the bulge of through-hole inner wall one side and is rather than the contact cooperation in the bar groove that corresponds, the ring cover has seted up the several second respectively and has passed through the groove, the second passes through the groove respectively with first groove position one-to-one and opening shape and size homogeneous phase, dog is towards center pin one side fixedly connected with spring respectively, the spring passes the second that corresponds respectively and passes through the groove and with center pin periphery fixed connection, the third groove that passes through has been seted up respectively to one side that the groove was passed through to the second, fix a position through elastic damping device between knob and the pivot.

According to the strong pressure lifter for the tractor with the switchable working state, the protruding parts of the stop blocks, which extend into the strip-shaped grooves, are of the rounded structures, and the strip-shaped grooves are also designed to be curved surface grooves matched with the protruding parts of the stop blocks in a contact mode.

The strong pressure lifter for the tractor with the switchable working state has the advantages that the spring force of the spring is required to be 2 times larger than the self gravity of the stop block.

As above, the strong pressure lifter for the tractor with switchable working states comprises the hemispherical rubber bumps, the hemispherical rubber bumps are arranged on the end faces of the two sides of the rotating shaft respectively, the opposite faces of the knobs on the two sides and the end face of the rotating shaft are provided with the two semicircular grooves respectively, and the spherical surfaces of the hemispherical rubber bumps protrude from the surface of the end face of the rotating shaft respectively and are in contact fit with the inner walls of the corresponding semicircular grooves.

According to the strong pressure lifter for the tractor with the switchable working state, the ring sleeve, the stop block, the rotating shaft and the connecting area of the lifting arm and the rotating shaft are all made of steel with the model of 35 CrMo.

According to the strong pressure lifter for the tractor with the switchable working state, two fixing rings are respectively and fixedly installed at the two ends of the periphery of the rotating shaft, and two fixing rings are respectively arranged on the two sides of each lifting arm.

The utility model has the advantages that: the strong pressure lifter can be switched between a connection state and a working state, the device is in the connection state under the figure state, at the moment, a user rotates a lifting arm with hand force, a stop block is pressed into a first through groove and a second through groove, a spring is compressed under force, the lifting arm can rotate around a central line of a rotating shaft, when the user rotates the lifting arm to a proper angle, the stop block can be clamped into a corresponding strip-shaped groove again under the pushing of the spring (because a rear suspension of a tractor has certain elasticity, the height of the strong pressure lifter can be adjusted by pressing a proper amount up and down within a certain range, the different height requirements of a connecting point of the lifting arm can be met by controlling the included angle between two adjacent strip-shaped grooves at the same side and the central line of the rotating shaft to be about 20 degrees), at the moment, the user can connect and fix the lifting arm and an agricultural machine, after the installation, the user needs to turn a knob with hand in an anticlockwise direction according, the knob rotates anticlockwise when overcoming the resistance of the elastic damping device, the spring can move into the third through groove from the second through groove, the opening of the third through groove is only slightly larger than the diameter of the spring, the side, connected with the spring, of the stop block can be in contact fit with the periphery of the ring sleeve, the stop block cannot retract into the normal rotating shaft, the lifting arm can be clamped by the stop block through the strip-shaped groove and cannot rotate around the rotating shaft, the device is switched to a working state, the rotating shaft can normally drive the lifting arm and the agricultural machine to complete rotating and lifting actions, and the knob can be held by the elastic damping device again to be kept in the current state at the moment until a user turns the knob forcibly to overcome the resistance of the elastic damping device and switch back to the connection state; this novel pressure raiser compares that the tradition has pressure relief device's pressure raiser and has reduced the oil leak risk, and operating condition switches more conveniently, only needs to twist and moves the rigid connection that the knob can throw off lifting arm and pivot, is fit for the new-type small-size pressure raiser of effect and promotes.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a schematic structural diagram of the present invention; fig. 2 is a right side view of the present invention; FIG. 3 is an enlarged view of a portion of FIG. 1 in the area I; fig. 4 is an enlarged view of the view a of fig. 3.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The utility model provides a but switching operating condition's strong pressure lifting mechanism for tractor, as shown in the figure, including lifting mechanism main part 1 and pivot 2, 2 pivot are connected with its rotation through lifting mechanism main part 1 and the dead eye traversing of 1 both sides of lifting mechanism main part, power device in lifting mechanism main part 1 is connected and drives pivot 2 through articulated seat and pivot 2 and rotates, lifting mechanism main part 1 adopts common strong pressure lifting mechanism major structure, it rotates to utilize the pneumatic cylinder to drive pivot 2 through articulated mode, thereby pivot 2 drives again and installs the lifting arm rotation of 2 both sides in the pivot and will install agricultural machinery on the lifting arm and mention or put down, strong pressure lifting mechanism is current mature technique, its concrete structure and theory of operation are no longer repeated here, characterized in that: the circle centers of the end surfaces of both sides of the rotating shaft 2 are respectively provided with a circular groove 21, the annular inner walls of the circular grooves 21 are respectively provided with a plurality of first through grooves 22, the first through grooves 22 are communicated with the periphery of the rotating shaft 2 and are uniformly distributed on the annular inner walls of the circular grooves 21, the circle centers of the end surfaces of the circular grooves 21 are respectively and fixedly provided with a central shaft 23, one end of the central shaft 23 is fixedly connected with the inner end surface of the circular groove 21, the other end of the central shaft 23 extends out of the opening of the circular groove 21, one end of the central shaft 23 facing the opening of the circular groove 21 is respectively provided with a knob 3 through a bearing, a gap of 3-5 mm is formed between the knob 3 and the corresponding end surface of the rotating shaft 2, one side of the knob 3 facing the rotating shaft 2 is fixedly provided with a ring sleeve 31, the ring sleeve 31 is inserted into the annular groove formed by the corresponding circular groove 21 and the central shaft 23, one end of the lifting arm 4 close to the rotating shaft 2 is respectively provided with a through hole 41, the lifting arm 4 is respectively sleeved on the peripheries of two sides of the rotating shaft 2 through the through holes 41, the through holes 41 are all in sliding fit with the periphery of the rotating shaft 2, the first through grooves 22 are respectively provided with a stop 5, the stop 5 is respectively in sliding fit with the corresponding first through grooves 22, the inner walls of the through holes 41 are respectively and uniformly provided with a plurality of strip-shaped grooves 42, the convex parts of one side of the stop 5 facing the inner wall of the through hole 41 respectively extend into the corresponding strip-shaped grooves 42 and are in contact fit with the same, the ring sleeve 31 is respectively provided with a plurality of second through grooves 32, the second through grooves 32 are respectively in one-to-one correspondence with the positions of the first through grooves 22 and have the same opening shape and size, one side of the stop 5 facing the central shaft 23 is respectively and fixedly connected with a spring 51, the spring 51 respectively penetrates through the corresponding second through, according to fig. 2, the third through grooves 33 are all positioned on one side of the corresponding second through grooves 32 in the clockwise direction, the third through grooves 33 are respectively communicated with the side walls of the corresponding second through grooves 32 to form a groove similar to a 'T', and the knob 3 and the rotating shaft 2 are positioned through an elastic damping device. The strong pressure lifter can be switched between a connection state and a working state, the device is in the connection state in a state shown in figure 1, at the moment, a user rotates a lifting arm 4 with force by hand, a stop block 5 can be pressed into a first through groove 22 and a second through groove 32, a spring 51 is compressed under force, the lifting arm 4 can rotate around the central line of a rotating shaft 2, when the user rotates the lifting arm 4 to a proper angle, the stop block 5 can be clamped into a corresponding strip-shaped groove 42 again under the pushing of the spring 51 (due to certain elasticity of a rear suspension of a tractor, the height of the strong pressure lifter can be adjusted by pressing a proper amount up and down within a certain range, the included angle between two adjacent strip-shaped grooves 42 on the same side and the central line of the rotating shaft 2 is controlled to be about 20 degrees, so that different height requirements of connecting points of the lifting arm 4 can be met), at the moment, the user can connect and fix the lifting arm 4 with an agricultural machine, after the installation, the user needs to turn a, the knob 3 rotates anticlockwise by overcoming the resistance of the elastic damping device, at the moment, the spring 51 moves into the third through groove 33 from the second through groove 32, because the opening of the third through groove 33 is only slightly larger than the diameter of the spring 51, the baffle 5 is connected with the spring 51 and is in contact fit with the periphery of the ring sleeve 31, so that the baffle 5 is blocked and cannot retract into the rotating shaft 2, at the moment, the baffle 5 clamps the lifting arm 4 through the strip-shaped groove 42 and cannot rotate around the rotating shaft 2, the device is switched to a working state, the rotating shaft 2 can normally drive the lifting arm 4 and the agricultural machine to complete rotating and lifting actions, at the moment, the knob 3 is also held by the elastic damping device again to keep the current state until a user turns the knob 3 forcibly to overcome the resistance of the elastic damping device and switch back to a connection state; this novel strong pressure lifting mechanism compares the tradition and has had pressure relief device's strong pressure lifting mechanism and has reduced the oil leak risk, and operating condition switches more conveniently, only needs to twist and moves knob 3 and can throw off the rigid connection of lifting arm 4 with pivot 2, is fit for the new-type small-size strong pressure lifting mechanism of effect and promotes.

Specifically, as shown in fig. 1, the protruding portion of the stopper 5 extending into the strip-shaped groove 42 in the present embodiment is a rounded structure, and the strip-shaped groove 42 is also designed as a curved groove in contact fit with the protruding portion of the stopper 5. When a user rotates the lifting arm 4 with force to apply a torque force to the lifting arm, the arc-shaped contact surface of the strip-shaped groove 42 and the stopper 5 gives a radial component force to the stopper 5, which is close to the central line of the rotating shaft 2, and as long as the radial component force is greater than the spring force of the spring 51, the stopper 5 is pressed into the first through groove 22 and the second through groove 32, and the lifting arm 4 can rotate around the rotating shaft 2.

Specifically, as shown in fig. 1, the spring force of the spring 51 in this embodiment needs to be 2 times greater than the self-weight of the stopper 5. This structure can guarantee that 2 static at the pivot, and the lifing arm 4 does not receive under the exogenic action, and spring 51 can compress tightly the bulge of dog 5 and block lifing arm 4 in bar groove 42, avoids it to take place to rotate.

Further, as shown in fig. 1, the elastic damping device of the present embodiment includes a hemispherical rubber bump 24, the two side end surfaces of the rotating shaft 2 are respectively provided with the hemispherical rubber bump 24, the opposite surfaces of the two side knobs 3 and the end surfaces of the rotating shaft 2 are respectively provided with two semicircular grooves 34, and the spherical surfaces of the hemispherical rubber bumps 24 respectively protrude from the end surface of the rotating shaft 2 and are in contact fit with the inner walls of the corresponding semicircular grooves 34. This structure blocks knob 3 through the mating reaction of hemisphere rubber lug 24 and half slot 34 and makes it can't take place to rotate around 2 central lines of rotation, when the user is twisted knob 3 hard, hemisphere rubber lug 24 can be flattened and extrude half slot 34, the user continues to rotate knob 3 and drives ring cover 31 and rotate, make spring 51 remove from second through slot 32 to third through slot 33, hemisphere rubber lug 24 just in time can block in another half slot 34 on knob 3 in order to keep knob 3's current position, this structure can prevent that knob 3 from taking place to rotate by oneself because of vibrations or other factors in the use, only the user is twisted knob 3 hard and is overcome the frictional force between hemisphere rubber lug 24 and the half slot 34 and just can switch over the operating condition of this device.

Further, not shown, the ring 31, the stopper 5, the shaft 2 and the connecting area of the lift arm 4 and the shaft 2 are made of steel material of 35 CrMo. The 35 CrMo alloy steel with yield strength up to 835 MPa is adopted to meet the requirement of the connection strength of the lifting arm 4, the torque of a single lifting arm 4 of a common small-sized forced lifter is mostly about 1250N/m, the diameter of the rotating shaft 2 is assumed to be 50 mm, the radial thickness between the circular groove 21 and the periphery of the rotating shaft 2 is not less than 10 mm, at least 4 stop blocks 5 are arranged on each side of the rotating shaft 2, the radial thickness of the ring sleeve 31 is not less than 5 mm, the size of each stop block 5 is about 5 mm multiplied by 20 mm multiplied by 15 mm, the contact surface between each stop block 5 and the strip-shaped groove 42 is approximately a semi-cylindrical surface with the diameter of 5 mm and the length of 20 mm, and the contact surface between each part and the strip-shaped groove 42 can be known as the maximum stress point when the lifting arm 4 rotates (only half of the contact surface between each stop block 5 and the strip-shaped groove 42 is stressed when the lifting arm 4 rotates towards a certain direction) through calculation and, the compressive resistance and the shearing resistance between each block 5 and the strip-shaped groove 42 are both more than 26000N, the torque which can be born by each block 5 is estimated to be about 1300N/m according to the diameter of the rotating shaft 2, and the structural strength requirement of the device can be met by adopting at least four blocks 5 in consideration of factors such as the starting instant impact force in actual use and the like.

Furthermore, as shown in fig. 1, two fixing rings 26 are respectively and fixedly installed at two ends of the outer periphery of the rotating shaft 2 according to the embodiment, and one fixing ring 26 is respectively installed at two sides of each lifting arm 4. The securing rings 26 on both sides of the lifting arm 4 prevent the lifting arm from sliding axially on the shaft 2.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (6)

1. The utility model provides a changeable operating condition's strong pressure lifting mechanism for tractor, includes lifting mechanism main part (1) and pivot (2), pivot (2) are connected through articulated seat and pivot (2) and are connected and drive pivot (2) rotation that the dead eye of lifting mechanism main part (1) both sides transversely passes lifting mechanism main part (1) and rotates rather than, power device in lifting mechanism main part (1): circular grooves (21) are respectively arranged at the circle center positions of the end surfaces of two sides of the rotating shaft (2), a plurality of first through grooves (22) are respectively arranged on the annular inner wall of each circular groove (21), a central shaft (23) is respectively and fixedly arranged at the circle center position of the end surface in each circular groove (21), a knob (3) is respectively and axially arranged at one end of the central shaft (23) facing the opening of the circular groove (21), a gap of 3-5 mm is formed between the corresponding end surfaces of the knob (3) and the rotating shaft (2), a ring sleeve (31) is fixedly arranged at one surface of the knob (3) facing the rotating shaft (2), the ring sleeves (31) are respectively inserted into the annular grooves formed by the corresponding circular grooves (21) and the central shaft (23), the periphery of the ring sleeve (31) is respectively in sliding fit with the annular inner wall of the corresponding circular groove (21), lifting arms (4) are respectively arranged at two sides of the periphery of the rotating shaft, the lifting arm (4) is sleeved on the peripheries of two sides of the rotating shaft (2) through holes (41) respectively, a stop block (5) is arranged in each first through groove (22), the stop blocks (5) are in sliding fit with the corresponding first through grooves (22) respectively, a plurality of strip-shaped grooves (42) are uniformly formed in the inner wall of each through hole (41), the protruding parts of one side, facing the inner wall of each through hole (41), of the stop blocks (5) extend into the corresponding strip-shaped grooves (42) respectively and are in contact fit with the corresponding strip-shaped grooves, a plurality of second through grooves (32) are formed in the ring sleeve (31) respectively, the second through grooves (32) correspond to the first through grooves (22) one by one and have the same opening shape and size, springs (51) are fixedly connected to one side, facing the central shaft (23), of the springs (51) penetrate through the corresponding second through grooves (32) respectively and are fixedly connected with the periphery of the central shaft (23), and third through grooves (33) are formed in one side of the second through, the knob (3) and the rotating shaft (2) are positioned through an elastic damping device.

2. The strong pressure lifter for the tractor with switchable working states according to claim 1, is characterized in that: the convex part of dog (5) stretching into bar groove (42) be the fillet structure, bar groove (42) are the same to be designed for the curved surface recess with dog (5) convex part contact complex.

3. The strong pressure lifter for the tractor with switchable working states according to claim 1 or 2, characterized in that: the spring force of the spring (51) needs to be 2 times larger than the self gravity of the stop block (5).

4. The strong pressure lifter for the tractor with switchable working state according to claim 3, characterized in that: elastic damping device include hemisphere rubber convex block (24), be equipped with hemisphere rubber convex block (24) on the both sides terminal surface of pivot (2) respectively, two semicircular groove (34) have been seted up respectively to the opposite face of both sides knob (3) and pivot (2) terminal surface equally divide, the sphere of hemisphere rubber convex block (24) is protruding respectively in pivot (2) terminal surface and with the cooperation of the contact of corresponding semicircular groove (34) inner wall.

5. The strong pressure lifter for the tractor with switchable working states according to claim 1, is characterized in that: the ring sleeve (31), the stop block (5), the rotating shaft (2) and the connecting area of the lifting arm (4) and the rotating shaft (2) are all made of steel with the model of 35 CrMo.

6. The strong pressure lifter for the tractor with switchable working states according to claim 1, is characterized in that: the two fixing rings (26) are respectively and fixedly mounted at the two ends of the periphery of the rotating shaft (2), and the two fixing rings (26) are respectively arranged on the two sides of each lifting arm (4).

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