CN117546683A - Mowing and flattening header cutter head assembly and cutter head box - Google Patents

Abstract

The invention relates to a mowing and flattening cutting table cutterhead assembly and a cutterhead box, which relate to the field of agricultural machinery. The cutterhead box comprises a mowing flattening header cutterhead assembly. The beneficial effects are that: the impact load only causes the fracture of one gear shaft, the problem that the serial gears are connected and toothed does not occur, a user only needs to replace one gear shaft, all gear shafts in the cutterhead box do not need to be replaced, and the maintenance cost and the maintenance time are greatly reduced.

Description

Mowing and flattening header cutter head assembly and cutter head box

Technical Field

The invention relates to the field of agricultural machinery, in particular to a mowing and flattening header cutterhead assembly and a cutterhead box.

Background

At present, in order to ensure a larger cutting width, a plurality of cutter seats are driven in a gear series connection mode by a cutter head box of a mowing and flattening cutting table. In the actual use process, a certain cutter disc of the cutter disc box always touches the conditions of ridges, stones and the like, so that the load of a single cutter disc is increased instantaneously, and the gear tooth breaking fault is caused. Because the gears adopt a serial structure form, if one gear is toothed, other gears are further caused to be connected and toothed. Once the fault occurs, a user has to replace all gears to restore the normal work of the cutterhead box, so that the maintenance cost is high, and more time and energy are required to be occupied by the user, thereby seriously affecting the operation efficiency and the user experience of the whole machine.

Disclosure of Invention

The invention aims to solve the technical problem of reducing the maintenance cost and time of the cutterhead box.

The technical scheme for solving the technical problems is as follows: the utility model provides a mowing flattens header blade disc subassembly, includes blade disc seat, casing and gear shaft, the gear shaft pass casing and middle part with the casing rotates to be connected, the blade disc seat with the gear shaft is located the one end of casing outside is connected and synchronous rotation, the safety protection groove has been seted up along its circumference to gear shaft middle part lateral wall.

The beneficial effects of the invention are as follows: when the cutter head receives impact load, the gear shaft breaks from the annular safety protection groove, so that the cutter head and the cutter head seat stop rotating, but one end of the gear shaft positioned in the shell can still continue to normally drive with other gears in the cutter head box, so that the gear-beating fault at the impact load position is avoided, and the serial gear-beating of other gears is avoided. That is, the impact load only causes the breakage of one gear shaft, the problem of tooth striking caused by the connection of the serial gears does not occur, the user only needs to replace one gear shaft, and all gear shafts in the cutterhead box do not need to be replaced, so that the maintenance cost and the maintenance time are greatly reduced.

On the basis of the technical scheme, the invention can be improved as follows.

Further, the locking device further comprises a fixing bolt and a locking nut, the gear shaft is provided with a locking through hole which is coaxially arranged, the fixing bolt comprises a bolt head and a screw rod which are fixedly connected, the bolt head is in butt joint with the gear shaft, and the screw rod penetrates through the locking through hole and is in threaded connection with the locking nut.

The beneficial effects of adopting the further scheme are as follows: after the gear shaft is broken, the cutter head seat cannot fall off due to the fixation of the fixing bolt, so that other unnecessary injuries are avoided.

Further, a locking groove is formed in the side wall of one end of the fixing bolt along the axial direction of the fixing bolt, the locking nut is provided with a bending piece, and the bending piece extends along the axial direction of the locking nut or is bent into the locking groove.

The beneficial effects of adopting the further scheme are as follows: after the locking nut is screwed up, the bending piece is bent into the locking groove, so that the locking nut is prevented from loosening.

Further, counter bores are formed at two ends of the locking through hole, and the bolt head and the locking nut are respectively located in the two counter bores.

The beneficial effects of adopting the further scheme are as follows: the bolt head and the lock nut are respectively positioned in the two counter bores, so that the assembly space is saved.

Further, the gear shaft comprises a bearing, and the middle part of the gear shaft is rotationally connected with the shell through the bearing.

Further, still include the retaining ring, the gear shaft includes main shaft and gear, the main shaft middle part has been seted up the safety protection groove, the one end of main shaft with gear fixed connection, the one end lateral wall of main shaft has the shaft shoulder, the bearing includes but relative pivoted inner circle and outer lane, the inner circle cover is established the middle part of main shaft, and its one end with the shaft shoulder butt, the casing has the casing hole, the one end of casing hole has the spacing end wall of casing along its radial inwards extension, the outer lane cover is located in the casing hole, the one end of outer lane with the spacing end wall butt of casing, the retaining ring with the hole joint of casing, and with the other end butt of outer lane, the other end of main shaft with cutter head seat is connected and synchronous rotation.

The beneficial effects of adopting the further scheme are as follows: the inner ring of the bearing is axially positioned through the shaft shoulder and the cutter disc seat, and the outer ring is axially positioned through the limiting end wall of the shell and the retainer ring, so that the installation is convenient.

Further, the cutter head seat is connected with the main shaft through a spline, and one end of the cutter head seat is in butt joint with the other end of the inner ring.

Further, the safety protection groove is positioned at the joint of the cutter disc seat and the bearing.

The beneficial effects of adopting the further scheme are as follows: after the gear shaft is broken from the safety protection groove, the rotation of the gear is not affected.

Further, the cutter head base further comprises an assembling nut, wherein the assembling nut is in threaded connection with the end part of the other end of the main shaft and is abutted with the other end of the cutter head base.

The beneficial effects of adopting the further scheme are as follows: the cutterhead seat is axially locked with the shell through an assembly nut.

The invention also provides a cutterhead box which comprises the mowing flattening header cutterhead assembly.

Drawings

FIG. 1 is a front view of a cutterhead box;

FIG. 2 is a top view of the cutterhead box;

FIG. 3 is a schematic view of the gearing within the cutterhead box;

FIG. 4 is a cross-sectional view of a prior art gear shaft;

FIG. 5 is a cross-sectional view of the mowing and flattening deck cutterhead assembly of the present invention;

FIG. 6 is an enlarged view of a portion of the mower and deck cutterhead assembly A of FIG. 5;

fig. 7 is an enlarged view of a portion of the mower and deck blade assembly B of fig. 5.

In the drawings, the list of components represented by the various numbers is as follows:

1. a cutterhead seat; 2. a housing; 21. a housing spacing end wall; 3. a gear shaft; 31. a shaft shoulder; 32. a gear; 4. a safety protection groove; 5. a fixing bolt; 6. a lock nut; 7. a locking groove; 8. bending the sheet; 9. a bearing; 10. a retainer ring; 11. assembling a nut; 12. a stepped structure.

Detailed Description

The principles and features of the present invention are described below with examples given for the purpose of illustration only and are not intended to limit the scope of the invention.

As shown in fig. 1-4, a plurality of cutterhead seats 1 in a cutterhead box at present are driven by gear shafts 3 to rotate, and the plurality of gear shafts 3 are sequentially driven by pinion gears. The cutter head seat 1 is fixed on a corresponding gear shaft 3, the gear shaft 3 has no protection structure, and after the load of a single cutter head is increased, a plurality of cutter heads are easy to cause tooth punching.

As shown in fig. 5-7, the present embodiment provides a mowing and flattening cutting deck cutterhead assembly, which includes a cutterhead seat 1, a casing 2 and a gear shaft 3, the gear shaft 3 passes through the casing 2 and is rotationally connected with the casing 2 in the middle, the cutterhead seat 1 and the gear shaft 3 are connected with one end located outside the casing 2 and synchronously rotate, and a safety protection groove 4 is formed in the side wall of the middle of the gear shaft 3 along the circumferential direction of the side wall.

When the cutter head receives impact load, the gear shaft 3 breaks from the annular safety protection groove 4, so that the cutter head and the cutter head seat 1 stop rotating, but the gear 32 can still continue to rotate normally along with other gears in the cutter head box, so that the gear breaking fault at the impact load position is avoided, and the serial gear breaking of other gears is avoided. That is, the impact load only causes the breakage of one gear shaft 3, the problem of tooth striking caused by the connection of the serial gears does not occur, the user only needs to replace one gear shaft 3, and all the gear shafts 3 in the cutterhead box do not need to be replaced any more, so that the maintenance cost and the maintenance time are greatly reduced.

Optionally, the cutterhead seat 1 is fixedly connected or in spline connection with the gear shaft 3.

Specifically, the safety protection slot 4 is located between the cutterhead seat 1 and the gear 32 of the gear shaft 3.

On the basis of the technical scheme, the novel gear shaft is characterized by further comprising a fixing bolt 5 and a locking nut 6, wherein the gear shaft 3 is provided with a coaxially-arranged locking through hole, the fixing bolt 5 comprises a bolt head and a screw rod which are fixedly connected, the bolt head is in butt joint with the gear shaft 3, and the screw rod penetrates through the locking through hole and is in threaded connection with the locking nut 6.

After the gear shaft 3 is broken, the cutter head seat 1 cannot fall off due to the fixation of the fixing bolt 5, so that other unnecessary injuries are avoided.

On the basis of the technical scheme, a locking groove 7 is formed in the side wall of one end of the fixing bolt 5 along the axial direction of the fixing bolt, the locking nut 6 is provided with a bending piece 8, and the bending piece 8 extends along the axial direction of the locking nut 6 or is bent into the locking groove 7.

After the locking nut 6 is screwed, the bending piece 8 is bent into the locking groove 7, so that the locking nut 6 is prevented from loosening.

Specifically, the lock nut 6 is provided with a plurality of bending pieces 8 at intervals along the circumferential direction. The fixing bolt 5 is provided with one or more locking grooves 7 in the circumferential direction. After the locking nut 6 is screwed down, at least one bending piece 8 is bent into the corresponding locking groove 7.

On the basis of the technical scheme, counter bores are formed at two ends of the locking through hole, and the bolt head and the locking nut 6 are respectively located in the two counter bores.

The bolt head and the lock nut 6 are respectively positioned in the two counter bores, so that the assembly space is saved.

On the basis of the technical scheme, the gear shaft further comprises a bearing 9, and the middle part of the gear shaft 3 is rotatably connected with the shell 2 through the bearing 9.

In one particular example, the bearing 9 is a double row ball bearing.

On the basis of the technical scheme, the novel cutter disc cutter comprises a cutter disc seat 1, and is characterized by further comprising a retainer ring 10, wherein the gear shaft 3 comprises a main shaft and a gear 32, the middle part of the main shaft is provided with a safety protection groove 4, one end of the main shaft is fixedly connected with the gear 32, one end side wall of the main shaft is provided with a shaft shoulder 31, the bearing 9 comprises an inner ring and an outer ring which can rotate relatively, the inner ring is sleeved on the middle part of the main shaft, one end of the inner ring is abutted to the shaft shoulder 31, the shell 2 is provided with a shell inner hole, one end of the shell inner hole is provided with a shell limiting end wall 21 extending inwards along the radial direction of the inner ring, the outer ring is sleeved in the shell inner hole, one end of the outer ring is abutted to the shell limiting end wall 21, the retainer ring 10 is in clamping connection with the shell inner hole, the other end of the outer ring is abutted to the other end of the outer ring, and the other end of the main shaft is connected with the cutter disc seat 1 and rotates synchronously.

The inner ring of the bearing 9 is axially positioned through the shaft shoulder 31 and the cutter head seat 1, and the outer ring is axially positioned through the shell limiting end wall 21 and the retainer ring 10, so that the installation is convenient.

Optionally, the other end of the inner ring is directly abutted with one end of the cutterhead seat 1, or an axial positioning piece such as a bulge or a shaft sleeve is arranged on the main shaft, and the other end of the inner ring is indirectly abutted with the cutterhead seat 1 through the axial positioning piece.

On the basis of the technical scheme, the cutter head seat 1 is connected with the main shaft through a spline, and one end of the cutter head seat 1 is abutted with the other end of the inner ring.

Specifically, as shown in fig. 5, one end of the cutterhead seat 1 extends into the inner hole of the shell and is abutted against the inner ring, and a sealing ring is arranged between the cutterhead seat 1 and the inner hole of the shell. The sealing ring can prevent lubricating oil in the cutterhead box from flowing out of the inner hole of the shell.

Specifically, the end face of one end of the cutterhead seat 1 is matched with the end face of the shell 2 by adopting a step structure 12, so that external impurities can be prevented from entering the cutterhead box.

On the basis of the technical scheme, as shown in fig. 6, the safety protection groove 4 is positioned at the joint of the cutterhead seat 1 and the bearing 9.

After the gear shaft 3 is broken from the safety protection groove 4, the rotation of the gear 32 is not affected.

On the basis of the technical scheme, the cutter head base further comprises an assembling nut 11, wherein the assembling nut 11 is in threaded connection with the end part of the other end of the main shaft and is abutted with the other end of the cutter head base 1. The cutterhead seat 1 is axially locked with the housing 2 by an assembly nut 11.

The embodiment also provides a cutterhead box, which comprises the mowing flattening header cutterhead assembly.

Specifically, the cutterhead box comprises a box body, and a shell 2 is fixedly connected with the box body. The plurality of mowing and flattening header cutterhead assemblies are arranged, and gear shafts 3 of the plurality of mowing and flattening header cutterhead assemblies are connected through gear transmission.

In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "axial", "radial", "circumferential", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention.

In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims (10)

1. The utility model provides a mowing flattens header blade disc subassembly, includes blade disc seat (1), casing (2) and gear shaft (3), gear shaft (3) pass casing (2) and middle part with casing (2) rotate and are connected, blade disc seat (1) with gear shaft (3) are located one end outside casing (2) is connected and synchronous rotation, its characterized in that, safety protection groove (4) have been seted up along its circumference to gear shaft (3) middle part lateral wall.

2. A mowing and flattening header cutterhead assembly in accordance with claim 1, further comprising a fixing bolt (5) and a lock nut (6), the gear shaft (3) having a coaxially-open locking through hole, the fixing bolt (5) comprising a fixedly-connected bolt head and a screw, the bolt head being in abutment with the gear shaft (3), the screw passing through the locking through hole and being in threaded connection with the lock nut (6).

3. A mowing and flattening header cutterhead assembly in accordance with claim 2, characterized in that a locking groove (7) is provided along an axial direction of the locking bolt (5) on one end side wall, the locking nut (6) is provided with a bending piece (8), and the bending piece (8) extends or bends along the axial direction of the locking nut (6) to be clamped into the locking groove (7).

4. A mowing and flattening header cutterhead assembly in accordance with claim 2, characterized in that both ends of the locking through hole are provided with counter bores, the bolt head and the locking nut (6) being located in both counter bores, respectively.

5. A mowing and flattening deck cutterhead assembly according to any of claims 1-4, further comprising a bearing (9), the middle part of the gear shaft (3) being rotatably connected to the housing (2) by means of the bearing (9).

6. The mowing and flattening header cutterhead assembly according to claim 5, further comprising a retainer ring (10), wherein the gear shaft (3) comprises a main shaft and a gear (32), the safety protection groove (4) is formed in the middle of the main shaft, one end of the main shaft is fixedly connected with the gear (32), a shaft shoulder (31) is arranged on one end side wall of the main shaft, the bearing (9) comprises an inner ring and an outer ring which can rotate relatively, the inner ring is sleeved in the middle of the main shaft, one end of the inner ring is abutted with the shaft shoulder (31), the housing (2) is provided with a housing inner hole, one end of the housing inner hole is provided with a housing limiting end wall (21) extending inwards along the radial direction of the housing inner hole, one end of the outer ring is abutted with the housing limiting end wall (21), the retainer ring (10) is in clamping connection with the housing inner hole and is abutted with the other end of the outer ring, and the other end of the main shaft is connected with the cutterhead seat (1) and rotates synchronously.

7. A mowing and flattening header cutter head assembly according to claim 6, characterized in that the cutter head seat (1) is connected to the main shaft by means of splines, one end of the cutter head seat (1) being in abutment with the other end of the inner ring.

8. A mowing and flattening header cutter head assembly according to claim 7, characterized in that the safety protection slot (4) is located where the cutter head seat (1) and the bearing (9) are joined.

9. A mowing and flattening header cutterhead assembly in accordance with claim 7, characterized in that it further comprises a fitting nut (11), said fitting nut (11) being screwed with the other end of the spindle and abutting the other end of the cutterhead seat (1).

10. A cutterhead box comprising a mowing and flattening header cutterhead assembly according to any one of claims 1-9.