Brake and shrub trimmer equipped with the brake

Abstract

The present invention discloses a brake and a shrub trimmer equipped with the brake, relating to the field of forestry machinery. The brake comprises an inner sleeve, a first outer sleeve, a second outer sleeve, and a core shaft. The core shaft is slidably connected to the inner sleeve and rotates synchronously with the inner sleeve. The first outer sleeve and the second outer sleeve are coaxially spaced and respectively sleeved coaxially with the inner sleeve. At the same time, the first outer sleeve and the second outer sleeve are respectively rotatably connected to the core shaft. One end of the core shaft is provided with a convex portion, and the second outer sleeve is provided with a concave portion that matches the outer shape of the convex portion. The core shaft can slide until the concave portion and the convex portion cooperate with each other or separate from each other. The shrub trimmer comprises a second frame and a third frame connected by the brake. The brake and the shrub trimmer equipped with the brake described in the present invention have higher flexibility and contouring effect.

Description

Technical Field

[0001] The invention relates to the field of forestry machinery, in particular to a brake and a shrub trimmer equipped with the brake. Background Art

[0002] Patent publication number CN101884296B discloses a multifunctional self-propelled shrub trimmer harvester, comprising a fixed frame and a transverse floating mechanism. The transverse floating mechanism can rotate relative to the fixed frame and the transverse floating mechanism and the fixed frame are relatively fixed by an electromagnetic brake. In actual use, the electromagnetic brake cannot actively adjust the angle. The only way is to manually place the front cutting part on the slope, and then activate the electromagnetic brake to fix the fixed frame and the transverse floating mechanism. However, due to the insufficient suction force of the electromagnetic brake, it is easy to fail when subjected to large cutting resistance. Based on this, in order to improve the operability and flexibility of existing shrub trimmers, this patent provides a new type of shrub trimmer. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides a brake and a shrub trimmer equipped with the brake.

[0004] Technical solution: In order to achieve the above-mentioned purpose, the present invention provides a brake, which includes an inner sleeve, a first outer sleeve, a second outer sleeve and a core shaft; the core shaft is slidably connected to the inner sleeve and rotates synchronously with the inner sleeve, the first outer sleeve and the second outer sleeve are coaxially spaced, and the first outer sleeve and the second outer sleeve are respectively coaxially sleeved with the inner sleeve, and at the same time, the first outer sleeve and the second outer sleeve are respectively formed with the core shaft in a relative rotation connection; one end of the core shaft is provided with a convex portion, and the second outer sleeve is provided with a concave portion matching the outer shape of the convex portion, and the core shaft can slide to make the concave portion and the convex portion match or separate from each other; when the concave portion and the convex portion match each other, the inner sleeve and the second outer sleeve rotate synchronously, and when the concave portion and the convex portion separate from each other, the inner sleeve and the second outer sleeve rotate separately.

[0005] Furthermore, the inner sleeve includes a first body, a first flange and a second flange; the first body is provided with a through first axial hole along its axial direction, the first flange is provided with a second axial hole, and the second flange is provided with a third axial hole. The first flange and the second flange are respectively connected to the two axial ends of the first body, and the first axial hole, the second axial hole and the third axial hole are connected to each other.

[0006] Furthermore, the core shaft is provided with a special-shaped section, and the third axial hole cooperates with the special-shaped section; under the action of the special-shaped section and the third axial hole, the core shaft and the inner sleeve rotate synchronously; a buffer spring is provided between the second flange and the convex portion, and the buffer spring is sleeved with the core shaft, and when the convex portion and the concave portion cooperate, the convex portion produces an extrusion effect on the buffer spring.

[0007] Furthermore, a connecting portion is provided at one end of the core shaft, so that the driving component can drag the core shaft to slide along the axial direction of the inner sleeve.

[0008] Furthermore, a magnetic clutch is provided between the second flange and the convex portion, the engaging end of the magnetic clutch is fixedly connected to the second flange, and the attracted end of the magnetic clutch is fixedly connected to the convex portion.

[0009] Furthermore, the second outer sleeve includes a second body and a sleeve; the second body and the inner sleeve are coaxially sleeved, one end of the sleeve is connected to the second body, and the other end is provided with a recess, and the second flange is provided in the sleeve.

[0010] Furthermore, it also includes a bushing, which is coaxially connected to the inner sleeve, and the first outer sleeve and the second outer sleeve are respectively coaxially connected to the bushing; the bushing is provided with a lubricating oil hole, and the lubricating oil can flow along the lubricating oil hole to the surface of the inner sleeve.

[0011] Furthermore, the first outer sleeve and the second outer sleeve are respectively provided with oil filling holes, and the surfaces of the first outer sleeve and the second outer sleeve that are in contact with the bushing are respectively provided with lubricating oil grooves, and the lubricating oil grooves are connected to the oil filling holes.

[0012] A shrub trimmer includes a first frame, a second frame, a third frame, a brake, a drive rod, a drive assembly and a cutter disc; the first frame is connected to a traction machine, the second frame is rotationally connected to the first frame, wherein the rotation axis is in a vertical direction, the second frame is connected to a first outer sleeve of the brake, and the third frame is connected to a second outer sleeve of the brake; the core shaft is connected to a traction structure of the traction machine, one end of the drive rod is hinged to the second frame, and the other end of the drive rod is hinged to an inner sleeve; the output end of the drive assembly is connected to the third frame and is drive-connected to the cutter disc.

[0013] Furthermore, the third frame includes a front plate, a connecting rod and a power box; the connecting rod includes a first rod and a second rod connected to each other as a whole, and the two ends of the first rod and the second rod are hinged to the front plate and the power box respectively; the front plate is connected to the first outer sleeve of the brake, the drive assembly is arranged in the power box, and a support rod is provided on the top of the second frame, and the support rod and the connecting rod are connected by a suspension spring.

[0014] The brake of the present invention and the shrub trimmer equipped with the brake have at least the following technical effects:

[0015] (1) When the concave portion and the convex portion cooperate with each other, the inner sleeve and the second outer sleeve rotate synchronously, and the inner sleeve is driven to adjust the rotation angle of the third frame; when the concave portion and the convex portion are separated from each other, the inner sleeve and the second outer sleeve rotate independently, and the third frame is relatively fixed; thereby, the flexibility of the shrub trimmer is improved while ensuring the stability, reliability and operability of the operation.

[0016] (2) During the use of the shrub trimmer, the profiling effect is better due to the operability of the brake.

[0017] (3) The first frame and the second frame are connected in relative rotation via a slewing support, thereby further improving the degree of freedom of the shrub trimmer during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The brake according to the present invention;

[0019] Figure 2 A structural cross-sectional view of a first embodiment of the brake according to the present invention;

[0020] Figure 3 A structural cross-sectional view of a second embodiment of the brake according to the present invention;

[0021] Figure 4 is an end view of the second flange of the present invention;

[0022] Figure 5 is a schematic structural diagram of the second outer jacket of the present invention;

[0023] Figure 6 for Figure 4 Middle AA section view;

[0024] Figure 7 It is a structural schematic diagram of the core shaft of the present invention;

[0025] Figure 8 It is a structural schematic diagram of the bushing of the present invention;

[0026] Figure 9 This is a schematic structural diagram of the shrub trimmer according to the present invention from a first perspective;

[0027] Figure 10 This is a schematic structural diagram of the shrub trimmer according to the present invention from a second viewing angle;

[0028] Figure 11 for Figure 8 Schematic diagram of the structure of part B;

[0029] Figure 12 for Figure 8 Cross-sectional view of part C.

[0030] In the figure, 1, brake; 2, inner sleeve; 3, first outer sleeve; 4, second outer sleeve; 5, core shaft; 6, protrusion; 7, recess; 8, first body; 9, first flange; 10, second flange; 11, first axial hole; 12, second axial hole; 13, third axial hole; 14, special-shaped section; 15, connecting part; 16, second body; 17, sleeve; 18, buffer spring; 19, bushing; 20, oil filling hole; 21, lubricating oil groove; 22, filling Wood trimmer; 23. First frame; 24. Second frame; 25. Third frame; 26. Drive rod; 27. Drive assembly; 28. Cutter head; 29. ​​Front plate; 30. Connecting rod; 31. Power box; 32. First rod; 33. Second rod; 34. Support rod; 35. Suspension spring; 36. Lubricating oil hole; 37. Slewing support; 38. Slide palm; 40. Coupling; 41. Gear reversing box; 42. Magnetic clutch; 43. Fixed sleeve. DETAILED DESCRIPTION

[0031] The following combination Figures 1 to 12 The principles and features of the present invention are described, and the examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] Implementation

[0033] This embodiment provides a brake, wherein the brake 1 includes an inner sleeve 2 , a first outer sleeve 3 , a second outer sleeve 4 , a core shaft 5 and a bushing 19 .

[0034] The core shaft 5 is slidably connected to the inner sleeve 2, and its sliding direction is the axial direction of the inner sleeve 2. At the same time, the core shaft 5 rotates synchronously with the inner sleeve 2. The first outer sleeve 3 and the second outer sleeve 4 are respectively sleeved and connected to the outside of the inner sleeve 2, and the first outer sleeve 3 and the second outer sleeve 4 are spaced apart in the axial direction, so as to ensure that the first outer sleeve 3 and the second outer sleeve 4 rotate relatively independently without affecting each other. In order to improve the rotation effect between the first outer sleeve 3 and the second outer sleeve 4 and the inner sleeve 2, bushings 19 are respectively sleeved between the inner sleeve 2 and the first outer sleeve 3, and between the inner sleeve 2 and the second outer sleeve 4. The first outer sleeve 3 and the second outer sleeve 4 are respectively provided with oil filling holes 20, and the inner surfaces of the first outer sleeve 3 and the second outer sleeve 4 that are in contact with the bushings 19 are both provided with lubricating oil grooves 21. The lubricating oil grooves 21 are connected to the oil filling holes 20, and lubricating oil can enter the lubricating oil grooves 21 through the oil filling holes 20. The bushing 19 is provided with lubricating oil holes 36, and the lubricating oil holes 36 are connected to the lubricating oil holes 36. The lubricant entering the lubricating oil groove 21 can enter the surface of the bushing 19 and the inner sleeve 2 that are in contact with each other through the lubricating oil hole 36 to complete the lubrication.

[0035] The inner sleeve 2 consists of three parts: a first body 8, a first flange 9, and a second flange 10. The first and second flanges 9 and 10 are located at opposite axial ends of the first body 8 and are secured to the first body 8 by bolts. The first body 8 is provided with an axially extending first axial hole 11, the first flange 9 is provided with an axially extending second axial hole 12, and the second flange 10 is provided with an axially extending third axial hole 13. After the first and second flanges 9 and 10 are fixedly connected to the first body 8, the first, second, and third axial holes 11, 12, and 13 are interconnected. The mandrel 5 is assembled into the first axial hole 11. A shaped section 14 (in this embodiment, triangular) is provided at one end of the mandrel 5. This shaped section 14 extends into the third axial hole 13. The cross-section of the third axial hole 13 matches that of the shaped section 14. The shaped section 14 and the third axial hole 13 cooperate to circumferentially fix the mandrel 5, thereby rotating synchronously with the inner sleeve 2. The other end of the core shaft 5 is provided with a connecting portion 15 , and the connecting portion 15 is provided with a through hole to facilitate the driving component to drag the core shaft 5 to slide along the axial direction of the inner sleeve 2 .

[0036] The second outer sleeve 4 comprises a second body 16 and a sleeve 17. One end of the sleeve 17 is connected to the second body 16, and the other end is provided with a recess 7 with an internal tooth profile. The distal end of the shaped segment 14 is provided with a protrusion 6 with an external tooth profile. The axial sliding of the mandrel 5 allows the protrusion 6 to engage with the recess 7, resulting in synchronous rotation of the second outer sleeve 4 when the inner sleeve 2 is driven to rotate. The axial sliding of the mandrel 5 allows the protrusion 6 to separate from the recess 7, resulting in relative stationary motion when the inner sleeve 2 is driven to rotate.

[0037] A buffer spring 18 is disposed within the sleeve 17 and is sleeved and connected to the core shaft 5. One end of the buffer spring 18 is connected to the second flange 10, and the other end of the buffer spring 18 is connected to the protrusion 6. When the protrusion 6 and the recess 7 engage with each other, the protrusion 6 exerts a compressive force on the buffer spring 18, and the buffer spring 18 acts as a limiter for the protrusion 6.

[0038] Example 2

[0039] The difference from the first embodiment is that this embodiment provides a brake 1 with a higher degree of automation, which is specifically manifested in the driving method of the core shaft 5. In this embodiment, one end of the core shaft 5 is not provided with a connecting portion 15 for dragging the core shaft 5, but a magnetic clutch 42 is provided between the second flange 10 and the protrusion 6. The engaging end of the magnetic clutch 42 is fixedly connected to the second flange 10, and the attracted end of the magnetic clutch 42 is fixedly connected to the protrusion 6. When the magnetic clutch 42 is actuated, the protrusion 6 slides together with the core shaft 5, and the protrusion 6 engages with the recess 7 to cause the inner sleeve 2 and the second outer sleeve 4 to rotate synchronously; when the magnetic clutch 42 is actuated again, the protrusion 6 slides again with the core shaft 5, and the protrusion 6 separates from the recess 7.

[0040] Example 3

[0041] This embodiment provides a shrub trimmer equipped with the above-mentioned brake 1. The shrub trimmer 22 includes a first frame 23, a second frame 24, a third frame 25, a brake 1, a drive rod 26, a drive assembly 27, and a cutter disc 28. The first frame 23 is connected to the traction structure of the traction machine, and the second frame 24 is rotatably connected to the first frame 23 via a slewing support 37, and its rotation axis is in the vertical direction. The third frame 25 is rotatably connected to the second frame 24, and its rotation axis is in the horizontal direction. Specifically, the first outer sleeve 3 is fixedly connected to the second frame 24, and the second outer sleeve 4 is fixedly connected to the third frame 25. The drive rod 26 is used to drive the inner sleeve 2 to rotate. Specifically, the two ends of the drive rod 26 are hinged to the second frame 24 and the inner sleeve 2, respectively. The drive rod 26 is a hydraulic cylinder. The drive rod 26 is extended or shortened to drive the inner sleeve 2 to rotate.

[0042] The third frame 25 includes a front plate 29, a connecting rod 30, and a power box 31. The connecting rod 30 includes a first rod 32 and a second rod 33, which are integrally connected and arranged in parallel. The ends of the first rod 32 and the second rod 33 are hinged to the front plate 29 and the power box 31, respectively. A support rod 34 is provided at the top of the second frame 24. The support rod 34 is connected to the connecting rod 30 via a suspension spring 35. The suspension spring 35 allows the third frame 25 to float up and down.

[0043] The drive assembly 27 is connected to the power box 31. The drive assembly 27 includes a hydraulic motor, a coupling 40 and a gear reversing box 41 connected in sequence. The cutter head 28 is connected to the output end of the gear reversing box 41. At the same time, the gear reversing box 41 is also connected to the sliding shoe 38. Figure 12As shown, the cutterhead 28 is connected to the output end of the gear reversing box 41 via a fixing sleeve 43. The connecting shaft of the sliding shoe 38 extends into the fixing sleeve 43, and a bearing is provided between the connecting shaft of the sliding shoe 38 and the fixing sleeve 43. When the cutterhead 28 moves downward, causing the sliding shoe 38 to contact the ground, the supporting portion of the sliding shoe 38 deforms upward to secure the cutterhead 28, thereby preventing the cutterhead 28 from interfering with the ground and damaging the cutterhead 28.

[0044] The shrub trimmer 22 described in this solution has a flexible structure and a good profiling effect.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A brake, characterized in that: The brake (1) comprises an inner sleeve (2), a first outer sleeve (3), a second outer sleeve (4) and a core shaft (5); the inner sleeve (2) can rotate under the drive of an external driving member; the core shaft (5) is slidably connected to the inner sleeve (2) and rotates synchronously with the inner sleeve (2); the first outer sleeve (3) and the second outer sleeve (4) are coaxially spaced and arranged; the first outer sleeve (3) and the second outer sleeve (4) are respectively coaxially sleeved with the inner sleeve (2); at the same time, the first outer sleeve (3) and the second outer sleeve (4) are respectively spaced and arranged with the core shaft (5) ) form a relative rotation connection; one end of the core shaft (5) is provided with a convex portion (6), and the second outer sleeve (4) is provided with a concave portion (7) that matches the outer shape of the convex portion (6), and the core shaft (5) can slide until the concave portion (7) and the convex portion (6) are matched with each other or separated from each other; when the concave portion (7) and the convex portion (6) are matched with each other, the inner sleeve (2) and the second outer sleeve (4) rotate synchronously, and when the concave portion (7) and the convex portion (6) are separated from each other, the inner sleeve (2) and the second outer sleeve (4) rotate separately.

2. The brake according to claim 1, characterized in that: The inner sleeve (2) comprises a first body (8), a first flange (9) and a second flange (10); the first body (8) is provided with a through first axial hole (11) along its axial direction, the first flange (9) is provided with a second axial hole (12), and the second flange (10) is provided with a third axial hole (13); the first flange (9) and the second flange (10) are respectively connected to the two axial ends of the first body (8), and the first axial hole (11), the second axial hole (12) and the third axial hole (13) are communicated with each other.

3. The brake according to claim 2, characterized in that: The core shaft (5) is provided with a special-shaped section (14), and the third axial hole (13) is matched with the special-shaped section (14); under the action of the special-shaped section (14) and the third axial hole (13), the core shaft (5) and the inner sleeve (2) rotate synchronously; a buffer spring (18) is provided between the second flange (10) and the convex portion (6), and the buffer spring (18) is sleeved with the core shaft (5). When the convex portion (6) and the concave portion (7) are matched, the convex portion (6) produces an extrusion effect on the buffer spring (18).

4. The brake according to claim 3, characterized in that: One end of the core shaft (5) is provided with a connecting portion (15) to facilitate the driving component to drag the core shaft (5) to slide along the axial direction of the inner sleeve (2).

5. The brake according to claim 3, characterized in that: A magnetic clutch (42) is provided between the second flange (10) and the convex portion (6), the engaging end of the magnetic clutch (42) is fixedly connected to the second flange (10), and the attracted end of the magnetic clutch (42) is fixedly connected to the convex portion (6).

6. The brake according to claim 2, characterized in that: The second outer sleeve (4) comprises a second body (16) and a sleeve (17); the second body (16) and the inner sleeve (2) are coaxially sleeved, one end of the sleeve (17) is connected to the second body (16), and the other end is provided with a recess (7), and the second flange (10) is provided in the sleeve (17).

7. The brake according to claim 1, characterized in that: The invention also includes a bushing (19), wherein the bushing (19) is coaxially sleeved and connected to the inner sleeve (2), and the first outer sleeve (3) and the second outer sleeve (4) are coaxially sleeved and connected to the bushing (19); the bushing (19) is provided with a lubricating oil hole (36), and the lubricating oil can flow along the lubricating oil hole (36) to the surface of the inner sleeve (2).

8. The brake according to claim 7, characterized in that: The first outer sleeve (3) and the second outer sleeve (4) are respectively provided with an oil filling hole (20), and the surfaces of the first outer sleeve (3) and the second outer sleeve (4) that are in contact with the bushing (19) are respectively provided with a lubricating oil groove (21), and the lubricating oil groove (21) is communicated with the oil filling hole (20).

9. A brush trimmer equipped with the brake according to claim 1, characterized in that: The invention comprises a first frame (23), a second frame (24), a third frame (25), a brake (1), an external driving member, a driving assembly (27) and a cutter disc (28); the first frame (23) is connected to the traction machine, the second frame (24) is rotationally connected to the first frame (23), wherein the rotation axis is in a vertical direction, the second frame (24) is connected to the first outer sleeve (3) of the brake (1), and the third frame (25) is connected to the second outer sleeve (4) of the brake (1); the core shaft (5) is connected to the traction structure of the traction machine; the external driving member is a driving rod (26), one end of the driving rod (26) is hinged to the second frame (24), and the other end of the driving rod (26) is hinged to the inner sleeve (2); the output end of the driving assembly (27) is connected to the third frame (25) and is drivingly connected to the cutter disc (28).

10. The shrub trimmer according to claim 9, characterized in that: The third frame (25) includes a front plate (29), a connecting rod (30) and a power box (31); the connecting rod (30) includes a first rod (32) and a second rod (33) connected to each other as a whole, and the two ends of the first rod (32) and the second rod (33) are hinged to the front plate (29) and the power box (31) respectively; the front plate (29) is connected to the first outer sleeve (3) of the brake (1), the driving assembly (27) is arranged in the power box (31), and a support rod (34) is provided on the top of the second frame (24), and the support rod (34) and the connecting rod (30) are connected via a suspension spring (35).

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