Milling excavating head mechanism and milling excavating machine

Abstract

A milling excavating head mechanism, comprising a mounting plate (7), a main arm (1), a connecting rod (2), a crank (3) and limiting plates, wherein the front end of the main arm (1) is pivotally connected to a milling excavating head (10), and the rear end of the main arm (1) is pivotally connected to the mounting plate (7); a first end of the connecting rod (2) is pivotally connected to the middle of the main arm (1), the middle of the main arm (1) being located between the front end of the main arm (1) and the rear end of the main arm (1); a first end of the crank (3) is pivotally connected to a second end of the connecting rod (2), and a second end of the crank (3) is pivotally connected to the mounting plate (7) and connected to an electric motor (15); and the limiting plates are arranged above and / or below the main arm (1) and each have one end fixedly arranged on the mounting plate (7), and a spring is provided between each limiting plate and the main arm (1). By means of the provision of a crank-connecting rod mechanism, the main arm (1) vibrates at a certain frequency in a vertical direction, so as to drive the milling excavating head (10) to swing at a certain frequency, thus applying a high impact force to the rock to crush the rock, while reducing wear and damage to the milling excavating head (10) and improving the operation efficiency of the milling excavating head mechanism; by means of the provision of springs, the main arm (1) is driven to move in the direction closer to the limiting plates, providing a certain degree of buffering force for the main arm (1).

Description

Milling head mechanism and milling machine Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a milling head mechanism and a milling machine. Background Art

[0002] A milling head is a key component of heavy-duty excavation machinery, replacing buckets, breakers, hydraulic shears, and other equipment. It can be used in a variety of applications, including coal mining, tunneling, roadway trench repair, and milling and excavating frozen rock. The design and manufacture of milling heads provide a crucial construction tool for these applications.

[0003] In the prior art, the milling head mechanism is generally composed of a fixed frame, a pick-shaped cutting tooth, and a motor, which is suitable for rock layers with medium and low hardness. If a rock layer with high hardness is encountered, the rock layer is not easy to be crushed and the milling head is easily damaged. Summary of the Invention

[0004] The present invention provides a milling head mechanism, which is used to solve the technical problems in the prior art that when the milling head mechanism encounters a rock layer with high hardness, the rock layer is not easily crushed and the milling head is easily damaged.

[0005] The milling head mechanism provided by the present invention comprises:

[0006] Mounting plate;

[0007] A large arm, the front end of which is pivotally connected to a milling head, and the rear end of which is pivotally connected to the mounting plate;

[0008] a connecting rod, a first end of which is pivotally connected to a middle portion of the upper arm, wherein the middle portion of the upper arm is between a front end of the upper arm and a rear end of the upper arm;

[0009] a crank, a first end of which is pivotally connected to the second end of the connecting rod, a second end of which is pivotally connected to the mounting plate and is connected to the motor; and

[0010] A limit plate is arranged above and / or below the upper arm and one end of which is fixed to the mounting plate. A spring is provided between the limit plate and the upper arm, and the spring always drives the upper arm to move in a direction close to the limit plate.

[0011] The present invention provides a milling head mechanism, which, on the one hand, realizes the vibration of the upper arm at a certain frequency in the vertical direction by setting a crank-connecting rod mechanism, thereby driving the milling head to swing at a certain frequency, exerting a higher impact force on the rock to crush the rock, reducing the wear and damage to the milling head, and improving the operating efficiency of the milling head mechanism; on the other hand, by setting a spring, the upper arm is driven to move in the direction close to the limit plate, providing a certain buffering force for the upper arm.

[0012] Further, the spring includes a first spring and a second spring;

[0013] The limit plate includes a first limit plate and a second limit plate, the first limit plate being located above the big arm and one end of which is fixed to the mounting plate, the first limit plate having a third groove on a side facing the big arm, and a third positioning pin being provided in the third groove; the upper wall surface of the big arm has a first groove, and the first positioning pin is provided in the first groove; the two ends of the first spring are respectively sleeved on the first positioning pin and the third positioning pin, and their two ends are respectively embedded in the first groove and the third groove; the second limit plate is located below the big arm and one end of the second limit plate is fixed to the mounting plate, the second limit plate having a fourth groove on a side facing the big arm, and a fourth positioning pin is provided in the fourth groove; the lower wall surface of the big arm has a second groove, and a second positioning pin is provided in the second groove; the two ends of the second spring are respectively sleeved on the second positioning pin and the fourth positioning pin, and their two ends are respectively embedded in the second groove and the fourth groove.

[0014] The present invention provides a milling head mechanism, in which a first spring and a second spring are respectively arranged above and below the upper arm. Under the action of the first spring and the second spring, the upper arm tends to the middle position between the first limit plate and the second limit plate, providing a bidirectional buffering force for the upper arm 1.

[0015] Furthermore, there are two milling heads, which are symmetrically arranged on both sides of the upper arm;

[0016] And / or, the front end of the arm has a first hole, the first hole is provided with a mounting shaft, and the milling head is pivotally connected to the mounting shaft; the rear end of the arm has a second hole, the second hole is provided with a support shaft, and the support shaft is pivotally connected to the mounting plate;

[0017] And / or, a connecting seat is provided at the middle of the upper arm, and the connecting seat has a third hole; a first hinge hole is provided at the first end of the connecting rod, and a rotating shaft is provided in the first hinge hole and the third hole;

[0018] And / or, the milling head mechanism further includes a cover plate, a front end of the cover plate is fixed to the first limiting plate, and a rear end of the cover plate is fixed to the mounting plate.

[0019] Furthermore, the mounting plate is fixed with side plates, and the side plates are respectively vertically connected to the first limiting plate and the second limiting plate; the side plates have a rotation hole, and the support shaft is pivotally connected to the rotation hole;

[0020] And / or, the cover plate is a curved plate.

[0021] Furthermore, the side panel includes a first side panel and a second side panel, the second side panel and the first side panel are arranged in parallel and spaced apart and are both located on both sides of the first limiting plate and the second limiting plate, the rear ends of the first side panel and the second side panel are fixed to the mounting plate, the first side panel is respectively connected to the first limiting plate and the second limiting plate, and the second side panel is respectively connected to the first limiting plate and the second limiting plate;

[0022] The rotating hole includes a first rotating hole and a second rotating hole. The first rotating hole is provided at the rear end of the first side plate, and the second rotating hole is provided at the rear end of the second side plate. The support shaft cooperates with the first rotating hole and the second rotating hole.

[0023] Furthermore, a first limiting groove is provided at the front end of the first side plate, a third limiting groove is provided at the front end of the second side plate, the third limiting groove and the first limiting groove are arranged opposite to each other, and the first limiting plate is fixed in the first limiting groove and the second limiting groove;

[0024] And / or, a second limiting groove is provided at the rear end of the first side panel, a fourth limiting groove is provided at the rear end of the second side panel, the fourth limiting groove and the second limiting groove are arranged relative to each other, and the hinge seat is fixed in the second limiting groove and the fourth limiting groove.

[0025] Furthermore, the mounting plate is provided with a hinge seat, and the hinge seat has a pivot hole; the second end of the crank has a second connecting hole, and the second connecting hole is fixed with a drive shaft, and the drive shaft is pivotally connected to the pivot hole.

[0026] Furthermore, the drive shaft is the motor shaft of the motor, a first keyway is provided in the second connecting hole, the motor shaft has a second keyway, and the first keyway and the second keyway are connected by a key;

[0027] And / or, the articulated seat includes a seat body, a first lug and a second lug, the seat body is fixed to the mounting plate, the first lug and the second lug are relatively spaced apart and respectively located on both sides of the crank, one end of the first lug and the second lug is fixed to the seat body, and the other end of the first lug and the second lug are both provided with the pivot hole.

[0028] A second aspect of the present invention provides a milling machine comprising the milling head mechanism described in any one of the above items. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] FIG1 is a schematic diagram of a half-section structure of a milling head mechanism provided by an embodiment of the present invention;

[0030] FIG2 is a schematic diagram of the assembly structure of a milling head mechanism provided by an embodiment of the present invention;

[0031] FIG3 is an axonometric diagram of a large arm in a milling head mechanism provided by an embodiment of the present invention;

[0032] FIG4 is a schematic structural diagram of a large arm in a milling head mechanism provided by an embodiment of the present invention;

[0033] FIG5 is a schematic structural diagram of a first limit plate in a milling head mechanism provided by an embodiment of the present invention;

[0034] FIG6 is a schematic diagram of a partial structure of a milling head mechanism provided by an embodiment of the present invention;

[0035] FIG7 is a schematic diagram of a connecting rod structure in a milling head mechanism provided by an embodiment of the present invention;

[0036] FIG8 is a schematic diagram of a crank structure in a milling head mechanism provided by an embodiment of the present invention;

[0037] FIG9 is a schematic diagram of a motor structure in a milling head mechanism provided by an embodiment of the present invention;

[0038] FIG10 is a schematic diagram of the structure of an articulated seat in a milling head mechanism provided by an embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 1. Upper arm; 1-1. First hole; 1-2. Second hole; 1-3. Connecting seat; 1-4. Third hole; 1-5. First groove; 1-6. First locating pin; 1-7. Second groove; 1-8. Second locating pin; 2. Connecting rod; 2-1. First hinge hole; 2-2. Second hinge hole; 2-3. Third lug; 3. Crank; 3-1. First connecting hole; 3-2. Second connecting hole; 3-3. First keyway; 4. Articulating seat; 4-1. Pivot hole; 4-2. Third fixing hole; 4-3. First lug; 4-4. Second lug; 5. Motor shaft; 5-1. Second keyway ;6. Support shaft;7. Mounting plate;8. First spring;9. Second spring;10. Milling head;11. First limiting plate;11-1. Third groove;11-2. Third positioning pin;11-3. First fixing hole;12. Second limiting plate;12-1. Fourth groove;12-2. Fourth positioning pin;13. First side plate;13-1. First rotating hole;13-2. First limiting groove;13-3. Second limiting groove;14. Second side plate;14-1. Second rotating hole;14-2. Third limiting groove;14-3. Fourth limiting groove;15. Motor;16. Cover plate. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to Figures 1-10.

[0042] In the present invention, the terms "connection" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated structure.

[0043] In the present invention, terms such as "inside", "outside", "upper", "lower", "front", and "back" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0044] An embodiment of the present invention provides a milling head mechanism, referring to Figure 1, the milling head mechanism includes a mounting plate 7, a boom 1, a connecting rod 2, a crank 3 and a limit plate, the front end of the boom 1 is pivotally connected to the milling head 10, and the rear end is pivotally connected to the mounting plate 7; the first end of the connecting rod 2 is pivotally connected to the middle part of the boom 1, and the middle part of the boom 1 is between the front end of the boom 1 and the rear end of the boom 1; the first end of the crank 3 is pivotally connected to the second end of the connecting rod 2, and the second end is pivotally connected to the mounting plate 7 and is connected to the motor 15; and, a limit plate, which is arranged above and / or below the boom 1 and one end of which is fixed to the mounting plate 7, and a spring is provided between the limit plate and the boom 1, and the spring always has the function of driving the boom 1 to move in a direction close to the limit plate.

[0045] A milling head mechanism provided by an embodiment of the present invention, on the one hand, by setting a crank-connecting rod mechanism, realizes the vibration of the upper arm 1 at a certain frequency in the vertical direction, thereby driving the milling head 10 to swing at a certain frequency, exerting a higher impact force on the rock to crush the rock, reducing the wear and damage to the milling head 10, and improving the operating efficiency of the milling head mechanism; on the other hand, by setting a spring, the upper arm 1 is driven to move in the direction close to the limit plate, providing a certain buffering force for the upper arm 1.

[0046] In an embodiment of the present invention, a milling head 10 includes a head body and pick teeth. The head body is cylindrical in structure. The pick teeth include a plurality of pick teeth, and the plurality of pick teeth are spaced apart along the axis of the head body and along the circumference of the head body. Preferably, the plurality of pick teeth are equally spaced along the axis of the head body and along the circumference of the head body.

[0047] 3 to 6, in the embodiment of the present invention, the spring includes a first spring 8 and a second spring 9; the limiting plate includes a first limiting plate 11 and a second limiting plate 12, the first limiting plate 11 is located above the upper arm 1 and one end of the first limiting plate 11 is fixed to the mounting plate 7, the first limiting plate 11 has a third groove 11-1 on the side facing the upper arm 1, and a third positioning pin 11-2 is provided in the third groove 11-1; the upper wall surface of the upper arm 1 has a first groove 1-5, and a first positioning pin 1-6 is provided in the first groove 1-5; the two ends of the first spring 8 are respectively sleeved on the first positioning pin 1-6 and the third positioning pin 11- 2 and its two ends are respectively embedded in the first groove 1-5 and the third groove 11-1; the second limiting plate 12 is located below the upper arm 1 and one end of which is fixed to the mounting plate 7. The second limiting plate 12 has a fourth groove 12-1 on the side facing the upper arm 1, and a fourth positioning pin 12-2 is provided in the fourth groove 12-1; the lower wall surface of the upper arm 1 has a second groove 1-7, and a second positioning pin 1-8 is provided in the second groove 1-7; the two ends of the second spring 9 are respectively sleeved on the second positioning pin 1-8 and the fourth positioning pin 12-2, and the two ends of the second spring 9 are respectively embedded in the second groove 1-7 and the fourth groove 12-1.

[0048] A milling head mechanism provided by an embodiment of the present invention provides a first spring 8 and a second spring 9 above and below the upper arm 1, respectively. Under the action of the first spring 8 and the second spring 9, the upper arm 1 tends to the middle position of the first limit plate 11 and the second limit plate 12, providing a bidirectional buffering force for the upper arm 1.

[0049] In the embodiment of the present invention, there are two milling heads 10 symmetrically arranged on both sides of the arm 1 .

[0050] Referring to Figure 3, in an embodiment of the present invention, the front end of the upper arm 1 has a first hole 1-1, the first hole 1-1 is provided with a mounting shaft, and the milling head 10 is pivotally connected to the mounting shaft; the rear end of the upper arm 1 has a second hole 1-2, the second hole 1-2 is provided with a support shaft 6, and the support shaft 6 is pivotally connected to the mounting plate 7.

[0051] Referring to Figure 3, in an embodiment of the present invention, a connecting seat 1-3 is provided in the middle of the upper arm 1, and the connecting seat 1-3 has a third hole 1-4; a first hinge hole 2-1 is provided at the first end of the connecting rod 2, and a rotating shaft is provided in the first hinge hole 2-1 and the third hole 1-4.

[0052] 7 , in the embodiment of the present invention, the first end of the connecting rod 2 has a third lug 2 - 3 , there are two third lugs 2 - 3 that are arranged in parallel and spaced apart, and the first hinge hole 2 - 1 is provided in the third lug 2 - 3 .

[0053] 1 and 2 , in this embodiment of the present invention, the milling head mechanism further includes a cover plate 16. The front end of the cover plate 16 is fixed to the first limit plate 11, and the rear end of the cover plate 16 is fixed to the mounting plate 7. This arrangement improves the stability and reliability of the connection between the first side plate 13 and the second side plate 14 and the mounting plate 7, providing a prerequisite for the stable operation of the milling head 10.

[0054] In the embodiment of the present invention, the cover plate 16 is a curved plate.

[0055] In the embodiment of the present invention, the mounting plate 7 is fixed with a side plate, which is respectively vertically connected to the first limiting plate 11 and the second limiting plate 12; the side plate has a rotation hole, and the support shaft 6 is pivotally connected to the rotation hole. Referring to Figures 2 and 6, in the embodiment of the present invention, the side plate includes a first side plate 13 and a second side plate 14, the second side plate 14 and the first side plate 13 are arranged parallel and spaced apart and are both located on both sides of the first limiting plate 11 and the second limiting plate 12, the rear ends of the first side plate 13 and the second side plate 14 are both fixed to the mounting plate 7, the first side plate 13 is respectively connected to the first limiting plate 11 and the second limiting plate 12, and the second side plate 14 is respectively connected to the first limiting plate 11 and the second limiting plate 12; the rotation hole includes a first rotation hole 13-1 and a second rotation hole 14-1, the first rotation hole 13-1 is provided at the rear end of the first side plate 13, and the second rotation hole 14-1 is provided at the rear end of the second side plate 14, and the support shaft 6 is matched with the first rotation hole 13-1 and the second rotation hole 14-1.

[0056] Referring to Figure 6, in an embodiment of the present invention, a first limiting groove 13-2 is provided at the front end of the first side plate 13, a third limiting groove 14-2 is provided at the front end of the second side plate 14, the third limiting groove 14-2 and the first limiting groove 13-2 are arranged opposite to each other, and the first limiting plate 11 is fixed in the first limiting groove 13-2 and the second limiting groove 13-3.

[0057] The first limiting plate 11 and the first limiting groove 13-2 and the third limiting groove 14-2 can be mounted in any manner, and can be welded or screwed. Referring to FIG. 5 , in an embodiment of the present invention, the first limiting plate 11 is provided with a first fixing hole 11-3, and the first limiting groove 13-2 and the third limiting groove 14-2 are provided with a second fixing hole. The first fixing hole 11-3 and the second fixing hole are connected by screws.

[0058] Referring to Figure 6, in an embodiment of the present invention, a second limiting groove 13-3 is provided at the rear end of the first side panel 13, and a fourth limiting groove 14-3 is provided at the rear end of the second side panel 14. The fourth limiting groove 14-3 and the second limiting groove 13-3 are arranged opposite to each other, and the hinge seat 4 is fixed in the second limiting groove 13-3 and the fourth limiting groove 14-3.

[0059] The hinge base 4 and the second limiting groove 13-3 and the fourth limiting groove 14-3 can be mounted in any manner, and can be welded or screwed. Referring to FIG10 , in an embodiment of the present invention, the hinge base 4 is provided with a third fixing hole 4-2, and the second limiting groove 13-3 and the fourth limiting groove 14-3 are provided with a fourth fixing hole, and the third fixing hole 4-2 and the fourth fixing hole are connected by screws.

[0060] 8 and 10 , in an embodiment of the present invention, the mounting plate 7 is provided with a hinge seat 4 having a pivot hole 4-1; the second end of the crank 3 has a second connecting hole 3-2, the second connecting hole 3-2 is fixed with a drive shaft, and the drive shaft is pivotally connected to the pivot hole 4-1.

[0061] 8 and 9 , in an embodiment of the present invention, the drive shaft is the motor shaft 5 of the motor 15 , a first keyway 3-3 is provided in the second connecting hole 3-2 , the motor shaft 5 has a second keyway 5-1 , and the first keyway 3-3 and the second keyway 5-1 are connected by a key.

[0062] Referring to Figure 10, in an embodiment of the present invention, the articulated seat 4 includes a seat body, a first lug 4-3 and a second lug 4-4. The seat body is fixed to the mounting plate 7. The first lug 4-3 and the second lug 4-4 ​​are arranged with relative spacing and are respectively located on both sides of the crank 3. One end of the first lug 4-3 and the second lug 4-4 ​​is fixed to the seat body, and the other ends of the first lug 4-3 and the second lug 4-4 ​​are both provided with a pivot hole 4-1.

[0063] A second aspect of an embodiment of the present invention provides a milling machine comprising any of the above-mentioned milling head mechanisms.

[0064] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the scope defined by the claims.

Claims

1. A milling head mechanism, characterized in that: include: Mounting plate (7); A large arm (1), the front end of which is pivotally connected to a milling head (10), and the rear end of which is pivotally connected to the mounting plate (7); A connecting rod (2), a first end of which is pivotally connected to the middle portion of the upper arm (1), the middle portion of the upper arm (1) being located between the front end of the upper arm (1) and the rear end of the upper arm (1); a crank (3), a first end of which is pivotally connected to the second end of the connecting rod (2), a second end of which is pivotally connected to the mounting plate (7) and is connected to a motor (15); and A limit plate is provided above and / or below the upper arm (1) and one end of which is fixed to the mounting plate (7). A spring is provided between the limit plate and the upper arm (1), and the spring always drives the upper arm (1) to move in a direction close to the limit plate.

2. The milling head mechanism according to claim 1, characterized in that: The spring comprises a first spring (8) and a second spring (9); The limiting plate comprises a first limiting plate (11) and a second limiting plate (12), the first limiting plate (11) being located above the upper arm (1) and having one end fixed to the mounting plate (7), the first limiting plate (11) having a third groove (11-1) on the side facing the upper arm (1), and a third positioning pin (11-2) being provided in the third groove (11-1); the upper wall surface of the upper arm (1) having a first groove (1-5), and a first positioning pin (1-6) being provided in the first groove (1-5); the two ends of the first spring (8) being respectively sleeved on the first positioning pin (1-6) and the third positioning pin (11-2), and the two ends of the first spring (8) being respectively embedded in the first groove (1-5) and the third positioning pin (11-2). The second limiting plate (12) is located below the upper arm (1) and one end of the second limiting plate (12) is fixed to the mounting plate (7); the second limiting plate (12) has a fourth groove (12-1) on the side facing the upper arm (1), and a fourth positioning pin (12-2) is provided in the fourth groove (12-1); the lower wall surface of the upper arm (1) has a second groove (1-7), and a second positioning pin (1-8) is provided in the second groove (1-7); the two ends of the second spring (9) are respectively sleeved on the second positioning pin (1-8) and the fourth positioning pin (12-2), and the two ends of the second spring (9) are respectively embedded in the second groove (1-7) and the fourth groove (12-1).

3. The milling head mechanism according to claim 2, characterized in that: The milling heads (10) are provided in two numbers and are symmetrically arranged on both sides of the upper arm (1); And / or, the front end of the upper arm (1) has a first hole (1-1), the first hole (1-1) is provided with a mounting shaft, and the milling head (10) is pivotally connected to the mounting shaft; the rear end of the upper arm (1) has a second hole (1-2), the second hole (1-2) is provided with a support shaft (6), and the support shaft (6) is pivotally connected to the mounting plate (7); And / or, a connecting seat (1-3) is provided in the middle of the upper arm (1), and the connecting seat (1-3) has a third hole (1-4); a first hinge hole (2-1) is provided at the first end of the connecting rod (2), and a rotating shaft is provided in the first hinge hole (2-1) and the third hole (1-4); And / or, the milling head mechanism further comprises a cover plate (16), the front end of the cover plate (16) being fixed to the first limiting plate (11), and the rear end of the cover plate (16) being fixed to the mounting plate (7).

4. The milling head mechanism according to claim 3, characterized in that: The mounting plate (7) is fixed with a side plate, and the side plate is vertically connected to the first limiting plate (11) and the second limiting plate (12) respectively; the side plate has a rotation hole, and the support shaft (6) is pivotally connected to the rotation hole; And / or, the cover plate (16) is a curved plate.

5. The milling head mechanism according to claim 4, characterized in that: The side panel comprises a first side panel (13) and a second side panel (14), the second side panel (14) and the first side panel (13) are arranged in parallel and spaced apart and are both located on both sides of the first limiting plate (11) and the second limiting plate (12), the rear ends of the first side panel (13) and the second side panel (14) are fixed to the mounting plate (7), the first side panel (13) is connected to the first limiting plate (11) and the second limiting plate (12) respectively, and the second side panel (14) is connected to the first limiting plate (11) and the second limiting plate (12) respectively; The rotating hole comprises a first rotating hole (13-1) and a second rotating hole (14-1), the first rotating hole (13-1) being provided at the rear end of the first side plate (13), the second rotating hole (14-1) being provided at the rear end of the second side plate (14), and the supporting shaft (6) being matched with both the first rotating hole (13-1) and the second rotating hole (14-1).

6. The milling head mechanism according to claim 5, characterized in that: A first limiting groove (13-2) is provided at the front end of the first side plate (13), a third limiting groove (14-2) is provided at the front end of the second side plate (14), the third limiting groove (14-2) and the first limiting groove (13-2) are arranged relative to each other, and the first limiting plate (11) is fixed in the first limiting groove (13-2) and the second limiting groove (13-3); And / or, the rear end of the first side plate (13) is provided with a second limiting groove (13-3), the rear end of the second side plate (14) is provided with a fourth limiting groove (14-3), the fourth limiting groove (14-3) and the second limiting groove (13-3) are arranged relative to each other, and the hinge seat (4) is fixed in the second limiting groove (13-3) and the fourth limiting groove (14-3).

7. The milling head mechanism according to any one of claims 1 to 6, characterized in that: The mounting plate (7) is provided with a hinge seat (4), and the hinge seat (4) has a pivot hole (4-1); the second end of the crank (3) has a second connecting hole (3-2), and the second connecting hole (3-2) is fixed with a drive shaft, and the drive shaft is pivotally connected to the pivot hole (4-1).

8. The milling head mechanism according to claim 7, characterized in that: The drive shaft is the motor shaft (5) of the motor (15), a first keyway (3-3) is provided in the second connecting hole (3-2), the motor shaft (5) has a second keyway (5-1), and the first keyway (3-3) and the second keyway (5-1) are connected via a key; And / or, the hinged seat (4) comprises a seat body, a first lug (4-3) and a second lug (4-4), the seat body being fixed to the mounting plate (7), the first lug (4-3) and the second lug (4-4) being arranged with relative spacing and respectively located on both sides of the crank (3), one end of the first lug (4-3) and the second lug (4-4) being fixed to the seat body, and the other end of the first lug (4-3) and the second lug (4-4) being provided with the pivot hole (4-1).

9. A milling machine, characterized in that: The invention comprises the milling head mechanism according to any one of claims 1 to 8.

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