CN212457840U - Self-locking mechanism of movable grain dryer - Google Patents

Abstract

The utility model discloses a self-locking mechanism of a movable grain dryer, which relates to the grain processing field and comprises an inner square tube, an outer square tube, a transmission device, a non-return device and a plurality of bevel gears; a first transmission rod of the transmission device is connected with a transmission wheel through a flat key, the first transmission rod is in clearance fit with the support clamping plate through a hole shaft, a plurality of push teeth are fixed on the cylindrical surface of the transmission wheel, and the cross sections of the push teeth are rectangular; the driving wheel is positioned in the strip-shaped through groove, and the pushing teeth are meshed with the limiting holes; the second transmission rod of the non-return device is connected with the ratchet wheel through a flat key, and the ratchet wheel is meshed with the pawl. The number of the limiting holes is increased to evenly distribute the pressure; all the transmission devices are connected with the non-return device through bevel gears, so that linkage is realized, and the operation method is simplified; meanwhile, the rectangular limiting hole and the pushing tooth structure are adopted, and the bearing area is larger than that of a circle. The utility model discloses avoided the self-locking mechanism unbalance loading of drying-machine to lead to spacing hole to take place the weak point of deformation, increased structural stability.

Description

Self-locking mechanism of movable grain dryer

Technical Field

The utility model relates to a grain processing field specifically is a self-locking mechanism of portable grain drying-machine.

Background

Along with the trend of agricultural development, more and more manufacturers begin to research and develop and produce grain dryers, wherein portable grain dryers are the representative of high-quality products, but grain dryers security problem is more and more outstanding at present stage, and the square pipe that plays the supporting role all around the dryer is the sleeve structure usually, often needs the lift adjustment position between urceolus and the inner tube, has upper and lower layer connection insecure, bears the weight not enough problem.

Chinese utility model 'a self-locking mechanism of portable grain drying-machine' (No. CN 207322582U) discloses an automatic locking device for fixing the relative position of an outer square tube and an inner square tube, but when used at the later stage, it is found that the self-locking mechanism arranged on one side of the square tube can cause unbalance loading and stress concentration, resulting in deformation of a limit hole and jamming of the outer square tube and the inner square tube, and making the lifting movement of the inner square tube difficult.

SUMMERY OF THE UTILITY MODEL

In order to overcome the shortcoming that the self-locking mechanism of current drying-machine can arouse that the unbalance loading leads to the emergence deformation in spacing hole among the above-mentioned background art, the utility model provides a self-locking mechanism of portable grain drying-machine.

The technical scheme that the above-mentioned weak point of the utility model was adopted is: a self-locking mechanism of a movable grain dryer comprises an inner square tube and an outer square tube, wherein the inner square tube is connected with the outer square tube in a sliding manner; limiting holes are formed in four sides of the inner square pipe, and the limiting holes are rectangular; four sides of outer side pipe are first side, second side, third side and fourth side respectively, first side, second side, third side and fourth side have all been opened the bar and have been led to the groove, and the bar leads to the groove both sides and is fixed with supporting splint through welding or bolted connection respectively, supporting splint are total eight, are two first supporting splint respectively, two second supporting splint, two third supporting splint, two fourth supporting splint.

The device also comprises a transmission device, a non-return device and a plurality of bevel gears; the transmission device comprises a first transmission rod and a transmission wheel, the first transmission rod is connected with the transmission wheel through a flat key, the first transmission rod is in clearance fit with the support clamping plate through a hole shaft, a plurality of push teeth are fixed on the cylindrical surface of the transmission wheel, and the cross sections of the push teeth are rectangular; the driving wheel is positioned in the strip-shaped through groove, and the pushing teeth are meshed with the limiting holes; the non-return device comprises a second transmission rod, a ratchet wheel, a pawl and a torsion spring, the second transmission rod is connected with the ratchet wheel through a flat key, the second transmission rod is in clearance fit with the supporting clamping plate through a hole shaft, the ratchet wheel is located in the strip-shaped through groove and meshed with the pawl, and the pawl is hinged to the first side face through the torsion spring.

The number of the transmission devices is three, and the transmission devices are respectively a first transmission device, a second transmission device and a third transmission device; the first side surface is connected with the non-return device through a first supporting clamping plate, the second side surface is connected with the first transmission device through a second supporting clamping plate, the third side surface is connected with the second transmission device through a third supporting clamping plate, and the fourth side surface is connected with the third transmission device through a fourth supporting clamping plate; the non-return device, the first transmission device, the second transmission device and the third transmission device are meshed through the bevel gears in sequence.

The torsion spring always keeps the trend of clockwise rotation, and the torsion spring exerts pulling force to the pawl, guarantees that the pawl can compress tightly the pawl under the natural state (unmanned intervention), avoids the pawl anticlockwise rotation.

And the pawl is provided with a pull ring.

The utility model discloses an useful part lies in: compared with the self-locking mechanism of the existing dryer, the number of the limiting holes is increased to evenly distribute the pressure; all the transmission devices are connected with the non-return device through bevel gears, so that linkage is realized, and the operation method is simplified; meanwhile, the rectangular limiting hole and the pushing tooth structure are adopted, and compared with a circular structure, the pushing tooth structure has a larger bearing area and increased compression resistance. Finally, the utility model discloses avoided the self-locking mechanism unbalance loading of drying-machine to lead to spacing hole to take place the weak point of warping, increased structural stability.

Drawings

The present application is further described below with reference to the accompanying drawings:

fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is a schematic view of the transmission;

FIG. 4 is a schematic view of a ratchet structure;

FIG. 5 is a schematic view of a support splint;

FIG. 6 is a schematic view of the pawl structure;

in the figure: 1-outer square tube, 101-first side face, 102-second side face, 103-third side face, 11-strip through groove, 12-supporting clamping plate, 121-first supporting clamping plate, 122-second supporting clamping plate, 123-third supporting clamping plate, 124-fourth supporting clamping plate, 2-inner square tube, 21-limiting hole, 3-transmission device, 301-first transmission device, 302-second transmission device, 303-third transmission device, 31-first transmission rod, 32-transmission wheel, 321-pushing tooth, 4-non-return device, 41-second transmission rod, 42-ratchet wheel, 43-pawl, 431-pulling ring, 44-torsion spring and 5-bevel gear.

Detailed Description

According to the above structural features of the present application, the embodiments of the present application will be further explained:

referring to fig. 1 to 6, the present embodiment provides a self-locking mechanism of a mobile grain dryer, including an inner square pipe 2 and an outer square pipe 1, where the inner square pipe 2 and the outer square pipe 1 are connected by sliding; the four sides of the inner square pipe 2 are all provided with limiting holes 21, and the limiting holes 21 are rectangular; four sides of outer square pipe 1 are first side 101, second side 102, third side 103 and fourth side 104 respectively, first side 101, second side 102, third side 103 and fourth side 104 all have opened the bar and have led to groove 11, and the bar is led to groove 11 both sides and is fixed with support splint 12 through welding or bolted connection respectively, support splint 12 is total eight, is two first support splint 121, two second support splint 122, two third support splint 123, two fourth support splint 124 respectively.

The device also comprises a transmission device 3, a non-return device 4 and a plurality of bevel gears 5; the transmission device 3 comprises a first transmission rod 31 and a transmission wheel 32, the first transmission rod 31 is connected with the transmission wheel 32 through a flat key, the first transmission rod 31 is in clearance fit with the support clamping plate 12 through a hole shaft, a plurality of push teeth 321 are fixed on the cylindrical surface of the transmission wheel 32, and the cross sections of the push teeth 321 are rectangular; the driving wheel 32 is positioned in the strip-shaped through groove 11, and the pushing tooth 321 is meshed with the limiting hole 21; the check device 4 comprises a second transmission rod 41, a ratchet wheel 42, a pawl 43 and a torsion spring 44, the second transmission rod 41 is connected with the ratchet wheel 42 through a flat key, the second transmission rod 41 is in clearance fit with the support clamping plate 12 through a hole shaft, the ratchet wheel 42 is positioned in the strip-shaped through groove 11, the ratchet wheel 42 is meshed with the pawl 43, and the pawl 43 is hinged with the first side surface 101 through the torsion spring 44.

The number of the transmission devices 3 is three, namely a first transmission device 301, a second transmission device 302 and a third transmission device 303; the first side 101 is connected with the non-return device 4 through a first supporting clamping plate 121, the second side 102 is connected with a first transmission device 301 through a second supporting clamping plate 122, the third side 103 is connected with a second transmission device 302 through a third supporting clamping plate 123, and the fourth side 104 is connected with a third transmission device 303 through a fourth supporting clamping plate 124; the non-return means 4, the first gearing 301, the second gearing 302 and the third gearing 303 are in turn engaged by a bevel gear 5.

The torsion spring 44 always keeps the trend of clockwise rotation, and the torsion spring 44 exerts pulling force on the pawl 43, so that the pawl 43 can press the ratchet wheel 42 in a natural state (without human intervention), and the ratchet wheel 42 is prevented from anticlockwise rotating.

The pawl 43 is provided with a pull ring 431.

The working principle is as follows: because the inner square pipe 2 and the outer square pipe 1 play a supporting role in the dryer, the inner square pipe 2 has a downward sliding trend relative to the outer square pipe 1, the transmission wheel 32 has a trend of rotating inwards, the ratchet wheel 42 has a trend of rotating inwards (namely anticlockwise), but due to the non-return effect of the pawl 43, the ratchet wheel 42 cannot rotate anticlockwise, so that the inner square pipe 2 cannot slide downwards, and a self-locking function is achieved.

For the condition that the height needs to be adjusted, the pull ring 431 needs to be pulled to enable the pawl 43 to be separated from the ratchet wheel 42, then any one of the rotating wheels 32 is rotated to drive all the rotating wheels 32 to rotate, the pushing teeth 321 push the limiting holes 21 to achieve height adjustment of the inner square tube 2, then the pull ring 431 is loosened, the pawl 43 compresses the ratchet wheel 42 to achieve self-locking, and the inner square tube 2 is prevented from sliding downwards.

Compared with the self-locking mechanism of the existing dryer, the utility model increases the number of the limiting holes 21 to evenly distribute the pressure; all the transmission devices 4 are connected with the non-return device 4 through the bevel gear 5, so that linkage is realized, and the operation method is simplified; meanwhile, the rectangular limiting hole 21 and the pushing teeth 321 are adopted, and compared with a circular structure, the pushing tooth has a larger bearing area, and the compression resistance is improved. Finally, the utility model discloses avoided the self-locking mechanism unbalance loading of drying-machine to lead to spacing hole to take place the weak point of warping, increased structural stability.

To sum up, to the technical personnel in the field, according to the guidance of the utility model, under the prerequisite that does not deviate from the principle and spirit of the utility model, to the change, modification, replacement, deformation that the utility model was done still fall into the protection scope of the utility model.

Claims (3)

1. A self-locking mechanism of a movable grain dryer comprises an inner square pipe (2) and an outer square pipe (1), wherein the inner square pipe (2) is connected with the outer square pipe (1) in a sliding manner; spacing hole (21), its characterized in that have all been opened on the four sides of interior side pipe (2): the limiting hole (21) is rectangular; four side faces of the outer square tube (1) are respectively a first side face (101), a second side face (102), a third side face (103) and a fourth side face (104), the first side face (101), the second side face (102), the third side face (103) and the fourth side face (104) are respectively provided with a strip-shaped through groove (11), two sides of the strip-shaped through groove (11) are respectively fixed with supporting clamping plates (12) through welding or bolt connection, the number of the supporting clamping plates (12) is eight, and the supporting clamping plates are respectively two first supporting clamping plates (121), two second supporting clamping plates (122), two third supporting clamping plates (123) and two fourth supporting clamping plates (124);

the device also comprises a transmission device (3), a non-return device (4) and a plurality of bevel gears (5); the transmission device (3) comprises a first transmission rod (31) and a transmission wheel (32), the first transmission rod (31) is connected with the transmission wheel (32) through a flat key, the first transmission rod (31) is in clearance fit with the support clamping plate (12) through a hole shaft, a plurality of push teeth (321) are fixed on the cylindrical surface of the transmission wheel (32), and the sections of the push teeth (321) are rectangular; the driving wheel (32) is positioned in the strip-shaped through groove (11), and the pushing teeth (321) are meshed with the limiting holes (21); the non-return device (4) comprises a second transmission rod (41), a ratchet wheel (42), a pawl (43) and a torsion spring (44), the second transmission rod (41) is connected with the ratchet wheel (42) through a flat key, the second transmission rod (41) is in clearance fit with the support clamping plate (12) through a hole shaft, the ratchet wheel (42) is located in the strip-shaped through groove (11), the ratchet wheel (42) is meshed with the pawl (43), and the pawl (43) is hinged with the first side surface (101) through the torsion spring (44);

the number of the transmission devices (3) is three, and the three transmission devices are respectively a first transmission device (301), a second transmission device (302) and a third transmission device (303); the first side surface (101) is connected with the non-return device (4) through a first supporting clamping plate (121), the second side surface (102) is connected with a first transmission device (301) through a second supporting clamping plate (122), the third side surface (103) is connected with a second transmission device (302) through a third supporting clamping plate (123), and the fourth side surface (104) is connected with a third transmission device (303) through a fourth supporting clamping plate (124); the non-return device (4), the first transmission device (301), the second transmission device (302) and the third transmission device (303) are meshed through the bevel gear (5) in sequence.

2. The self-locking mechanism of the mobile grain dryer of claim 1, wherein: the torsion spring (44) always keeps the trend of clockwise rotation, and the torsion spring (44) exerts pulling force on the pawl (43).

3. The self-locking mechanism of the mobile grain dryer of claim 1, wherein: the pawl (43) is provided with a pull ring (431).

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