Spring harrow leg of hydraulic heavy harrow

Abstract

The utility model discloses a spring harrow leg of a hydraulic heavy harrow. The spring harrow leg comprises a fixed seat, a harrow leg, a connecting rod and a pressure spring, the fixed seat is fixed on a main beam; each rake leg is provided with a first extending part extending forwards and upwards, a second extending part extending downwards and a bent part arranged between the first extending part and the second extending part, the tail end of the first extending part is hinged to the fixing base, a rake piece is installed at the tail end of the second extending part, a supporting base is arranged on the upper side of the bent part, and a straight notch is formed in the supporting base in the vertical direction; the connecting rod is arranged obliquely above the rake leg, one end of the connecting rod is hinged to the fixing base, the other end of the connecting rod penetrates through the straight notch and is provided with a locking piece locked to the rear side of the straight notch, and a supporting piece is arranged on the side, close to the fixing base, outside the connecting rod; and the pressure spring is sleeved outside the connecting rod and is supported between the supporting seat and the supporting piece. According to the utility model, the harrow legs can be buffered, the stress condition of the harrow legs is better, and the harrow legs are not easy to deform.

Description

TECHNICAL FIELD

[0001] The utility model relates to agricultural machinery technical field, concretely relates to a spring harrow leg of hydraulic heavy harrow. BACKGROUND

[0002] Hydraulic heavy harrow is an important agricultural tillage machinery, can be pulled through tractor, and the depth and angle of harrow blade are controlled through hydraulic system, when working, the harrow blade cuts into the soil, and the surface is broken, leveled and the like, and the straw and the like are cut and returned to the field.

[0003] Chinese utility model patent CN217694218U discloses a single body double-disc combined land preparation machine harrow group, the patent is equipped with a buffer assembly between the harrow leg and the harrow base, the buffer assembly can maintain the initial state of the harrow leg relative to the harrow base during normal tillage, and can also be compressed to play a buffering role when obstacles are encountered, and the harrow leg is reset to continue working after passing the obstacles, so that the use of different ground conditions is not affected by the tillage effect.However, the buffer assembly of the above scheme is supported between the harrow base and the harrow leg connecting seat, and the hook-shaped harrow leg receives a large bending moment during operation, which is prone to deformation. SUMMARY

[0004] In view of the defects in the prior art, the utility model provides a spring harrow leg of hydraulic heavy harrow, so that it can not only play a buffering role on the harrow leg, but also has better stress conditions and is not prone to deformation.

[0005] The utility model provides a spring harrow leg of hydraulic heavy harrow, comprising:

[0006] The fixed seat is used for fixing on the main beam;

[0007] The harrow leg has a first extension part extending forward and upward, a second extension part extending downward and a bending part between the first extension part and the second extension part, the end of the first extension part is hinged to the fixed seat, the end of the second extension part is provided with a harrow blade, the upper side of the bending part is provided with a support seat, and a straight slot is vertically formed in the support seat;

[0008] The connecting rod is arranged obliquely above the harrow leg, one end of the connecting rod is hinged to the fixed seat, the other end of the connecting rod passes through the straight slot and is provided with a locking piece locked behind the straight slot, and the side of the connecting rod close to the fixed seat is provided with a support piece;

[0009] The compression spring is sleeved outside the connecting rod and supported between the support seat and the support piece.

[0010] Further, the rear part of the fixing seat oppositely sets two clamping plates, the lower rotating pin and the upper rotating pin are arranged between the two clamping plates, the first extension part of the harrow leg is limited between the two clamping plates and is provided with a hole for the lower rotating pin to pass through, and the end of the connecting rod is provided with a rotating sleeve which is limited between the two clamping plates and is sleeved on the outside of the upper rotating pin.

[0011] Further, the lower rotating pin is arranged between the protruding parts of the two clamping plates downward and rearward, and the upper rotating pin is arranged between the protruding parts of the two clamping plates upward and rearward.

[0012] Further, the support seat comprises two side plates which are respectively welded on the two sides of the curved part of the harrow leg and a support plate which is welded between the two side plates, the straight slot is arranged on the support plate, and the rear end of the compression spring is supported on the support plate.

[0013] Further, the front side of the support plate is provided with a first positioning ring which surrounds the outside of the straight slot, and the front end of the compression spring is positioned outside the first positioning ring.

[0014] Further, the connecting rod is a threaded rod, the support member comprises an adjusting nut which is threadedly sleeved on the outside of the threaded rod and a support ring which is arranged on the rear side of the adjusting nut, and the front end of the compression spring is supported on the support ring.

[0015] Further, the rear side of the support ring is provided with a second positioning ring, and the front end of the compression spring is positioned outside the second positioning ring.

[0016] Further, the locking member is a locking nut which is threadedly sleeved on the rear end of the threaded rod.

[0017] The beneficial effects of the utility model lie in:

[0018] The harrow leg in the application is pressed by the compression spring, the compression spring can play a buffering role on the harrow leg, when working normally, the tractor drags the hydraulic harrow to move forward, the harrow blade at the lower end of the harrow leg penetrates into the soil, when encountering obstacles such as stones, the harrow blade lifts the harrow leg upward and swings, the compression spring is compressed, after the harrow blade passes the obstacles, the harrow blade cuts into the soil downward again under the action of the compression spring, so that the up-and-down floating of the harrow blade can be realized.

[0019] The connecting rod in the application plays a limiting role on the stroke of the downward swinging of the harrow leg, one end of the connecting rod is hinged to the fixing seat, the other end passes through the straight slot on the support seat, in the process of upward swinging of the harrow leg, the connecting rod can move along the straight slot, so that the connecting rod and the support seat are prevented from being stuck to affect the swinging of the harrow leg.

[0020] The support seat is arranged at the curved portion of the harrow leg, and the compression spring is supported on the support seat, so that the support point of the compression spring to the harrow leg is located at the curved portion in the middle of the harrow leg, and the harrow leg is better in stress condition and is not prone to deformation. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, various elements or parts are not necessarily drawn according to the actual scale.

[0022] Figure 1 Assembly view of the embodiment of the present application;

[0023] Figure 2 Exploded view of the embodiment of the present application;

[0024] Figure 3 Schematic view of the embodiment of the present application in normal operation and when the harrow leg swings upward when encountering an obstacle.

[0025] Reference signs:

[0026] 100 - fixed seat; 110 - clamping plate; 120 - lower rotating pin; 130 - upper rotating pin; 200 - harrow leg; 210 - first extension; 220 - second extension; 230 - curved portion; 240 - support seat; 241 - side plate; 242 - support plate; 2421 - straight slot; 2422 - first positioning ring; 300 - harrow blade; 400 - connecting rod; 410 - support piece; 411 - adjusting nut; 412 - support ring; 4121 - second positioning ring; 420 - locking nut; 430 - rotating sleeve; 500 - compression spring. DETAILED DESCRIPTION

[0027] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0028] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meanings understood by the technical personnel in the field to which the present application belongs.

[0029] As Figures 1-3 shown, the embodiment of the present application provides a spring harrow leg of a hydraulic heavy harrow, which comprises a fixed seat 100, a harrow leg 200, a connecting rod 400 and a compression spring 500.

[0030] The fixed seat 100 is used for being fixed on a main beam.

[0031] The harrow leg 200 has a first extension 210 extending forward and upward, a second extension 220 extending downward, and a bending portion 230 between the first extension 210 and the second extension 220, the end of the first extension 210 is hinged to the fixed seat 100, the end of the second extension 220 is provided with a harrow blade 300, the upper side of the bending portion 230 is provided with a support seat 240, and the support seat 240 is vertically provided with a straight slot 2421.

[0032] The connecting rod 400 is arranged obliquely above the harrow leg 200, one end of the connecting rod 400 is hinged to the fixed seat 100, the other end of the connecting rod 400 passes through the straight slot 2421 and is provided with a locking piece locked at the rear side of the straight slot 2421, and the side of the connecting rod 400 close to the fixed seat 100 is provided with a support piece 410.

[0033] The compression spring 500 is sleeved outside the connecting rod 400 and supported between the support seat 240 and the support piece 410.

[0034] The harrow leg 200 of the present application is pressed by the compression spring 500, and the compression spring 500 can play a buffering role on the harrow leg 200, referring to Figure 3 , when the harrow leg 200 is normally working, the tractor pulls the hydraulic seed harrow forward, the harrow blade 300 at the lower end of the harrow leg 200 penetrates into the soil, when encountering obstacles such as stones, the harrow blade 300 lifts the harrow leg 200 upward and swings, the compression spring 500 is compressed, and after the harrow blade 300 passes over the obstacle, the harrow blade 300 penetrates into the soil again under the action of the compression spring 500, so that the up-and-down floating of the harrow blade 300 can be realized.

[0035] The connecting rod 400 in the present application plays a limiting role on the stroke of the downward swing of the harrow leg 200, one end of the connecting rod 400 is hinged to the fixed seat 100, and the other end passes through the straight slot 2421 on the support seat 240, during the upward swing of the harrow leg 200, the connecting rod 400 can move along the straight slot 2421, so that the connecting rod 400 and the support seat 240 are prevented from being stuck to affect the swing of the harrow leg 200.

[0036] In the present application, the support seat 240 is arranged at the bending portion 230 of the harrow leg 200, and the compression spring 500 is supported on the support seat 240, which is equivalent to that the support point of the compression spring 500 on the harrow leg 200 is located at the bending portion 230 of the harrow leg 200, so that the harrow leg 200 is in a better stress condition and is not easy to deform.

[0037] In some embodiments, referring to Figure 2In order to facilitate the hinging of the harrow leg 200 and the connecting rod 400 with the fixing base 100, the rear part of the fixing base 100 is provided with two clamping plates 110 opposite to each other, and a lower rotating pin 120 and an upper rotating pin 130 are arranged between the two clamping plates 110. Specifically, the lower rotating pin 120 is arranged between the downward protruding parts of the two clamping plates 110, and the upper rotating pin 130 is arranged between the upward protruding parts of the two clamping plates 110. The first extension part 210 of the harrow leg 200 is limited between the two clamping plates 110 and is provided with a hole through which the lower rotating pin 120 passes, and the end of the connecting rod 400 is provided with a rotating sleeve 430 which is limited between the two clamping plates 110 and is sleeved outside the upper rotating pin 130.

[0038] In some embodiments, with reference to Figure 1 and Figure 2 The support base 240 comprises two side plates 241 respectively welded on the two sides of the curved part 230 of the harrow leg 200 and a support plate 242 welded between the two side plates 241, and a straight slot 2421 is arranged on the support plate 242, and the rear end of the compression spring 500 is supported on the support plate 242. The support base 240 has the above structure and is simple in structure and convenient to process.

[0039] Optionally, in order to realize the positioning and installation of the rear end of the compression spring 500, the front side of the support plate 242 is provided with a first positioning ring 2422 surrounding the outside of the straight slot 2421, and the rear end of the compression spring 500 is positioned outside the first positioning ring 2422.

[0040] In some embodiments, with reference to Figure 2 The connecting rod 400 is a threaded rod, the support member 410 comprises an adjusting nut 411 threadedly sleeved outside the threaded rod and a support ring 412 arranged on the rear side of the adjusting nut 411, and the front end of the compression spring 500 is supported on the support ring 412. The connecting rod 400 adopts the threaded rod structure, the support member 410 adopts the structure of the adjusting nut 411 and the support ring 412, the position of the support member 410 can be adjusted by rotating the support member 410, and then the elastic force of the compression spring 500 is adjusted.

[0041] Optionally, in order to realize the positioning and installation of the front end of the compression spring 500, the rear side of the support ring 412 is provided with a second positioning ring 4121, and the front end of the compression spring 500 is positioned outside the second positioning ring 4121.

[0042] In some embodiments, the locking member is a locking nut 420 threadedly sleeved at the rear end of the threaded rod.

[0043] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application.

Claims

1. A spring-loaded rake leg for a hydraulic heavy rake, characterized in that, include: The fixing seat is used to fix it to the main beam; The rake leg has a first extension extending forward and upward, a second extension extending downward, and a curved portion located between the first extension and the second extension. The end of the first extension is hinged to the fixed base, and the end of the second extension is equipped with a rake blade. A support base is provided on the upper side of the curved portion, and the support base has a vertically formed straight groove. A connecting rod is located diagonally above the rake leg. One end of the connecting rod is hinged to the fixed base, and the other end of the connecting rod passes through the straight slot and is provided with a locking member locked to the rear side of the straight slot. A support member is provided on the side of the connecting rod near the fixed base. A compression spring is sleeved outside the connecting rod and supported between the support base and the support member.

2. The spring-loaded rake legs of the hydraulic heavy rake according to claim 1, characterized in that, The rear of the fixed base is provided with two clamping plates facing each other on the left and right. A lower rotating pin and an upper rotating pin are provided between the two clamping plates. The end of the first extension of the rake leg is limited between the two clamping plates and is provided with a hole for the lower rotating pin to pass through. The end of the connecting rod is provided with a rotating sleeve that is limited between the two clamping plates and is sleeved on the upper rotating pin.

3. The spring-loaded rake legs of the hydraulic heavy rake according to claim 2, characterized in that, The lower rotating pin is located between the rearward and downward protruding parts of the two clamping plates, and the upper rotating pin is located between the rearward and upward protruding parts of the two clamping plates.

4. The spring-loaded rake legs of the hydraulic heavy rake according to claim 1, characterized in that, The support base includes two side plates welded to both sides of the bent portion of the rake leg and a support plate welded between the two side plates. The straight groove is provided on the support plate, and the rear end of the compression spring is supported on the support plate.

5. The spring-loaded rake legs of the hydraulic heavy rake according to claim 4, characterized in that, The front side of the support plate is provided with a first positioning ring surrounding the straight slot, and the rear end of the compression spring is positioned outside the first positioning ring.

6. The spring-loaded rake legs of the hydraulic heavy rake according to claim 1, characterized in that, The connecting rod is a threaded rod, and the support includes an adjusting nut threaded onto the outside of the threaded rod and a support ring located behind the adjusting nut. The front end of the compression spring is supported on the support ring.

7. The spring-loaded rake legs of the hydraulic heavy rake according to claim 6, characterized in that, The support ring is provided with a second positioning ring on its rear side, and the front end of the compression spring is positioned outside the second positioning ring.

8. The spring-loaded rake legs of the hydraulic heavy rake according to claim 6, characterized in that, The locking element is a locking nut that is threaded onto the rear end of the threaded rod.

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