Linkage, transmission, machine tool head assembly and machine tool

Abstract

The utility model provides a connecting rod mechanism, transmission mechanism, machine tool processing head subassembly and machine tool, this connecting rod mechanism includes first connecting rod, second connecting rod, connecting shaft, first sleeve piece, second sleeve piece, separator and locking nut, one end of first connecting rod is overlaid with one end of second connecting rod, and one end of first connecting rod and one end of second connecting rod are all rotatoryly connected with connecting shaft, first connecting rod is rotatoryly connected with connecting shaft through first sleeve piece, second connecting rod is rotatoryly connected with connecting shaft through second sleeve piece, separator is sleeved on connecting shaft and is located between first connecting rod and second connecting rod, connecting shaft includes connecting head and the installation pole of fixed connection with connecting head, the installation pole passes first sleeve piece and second sleeve piece in proper order and is connected with locking nut, the utility model technical scheme provides connecting rod mechanism, can guarantee the security when first connecting rod is active.

Description

Technical Field

[0001] This utility model relates to the field of processing equipment technology, and in particular to a linkage mechanism, a transmission mechanism, a machine tool processing head assembly, and a machine tool. Background Technology

[0002] A linkage mechanism is a mechanical device consisting of multiple rigid links connected by hinges (revolute joints) or sliders (prismatic joints) to transmit and convert motion and force. Its core characteristic is that it achieves specific trajectories, speeds, or force changes through the relative motion of the links.

[0003] The two rods can rotate via a fixed post and switch between extended and folded states. When the rods transmit forces, the stress on the fixed post is mainly concentrated at the threaded connection at its front end, where it bears the force from the rods. This point experiences a large bending moment and is the weakest link in the fixed post during operation. When the two rods rotate in opposite directions, a torsional force is applied to the front end of the fixed post, frequently causing the threaded portion at the front end to bend, deform, and break (see patent publication number WO2021135761A1).

[0004] Therefore, ensuring the safety of linkage mechanisms during operation is an urgent problem to be solved. Utility Model Content

[0005] This utility model provides a linkage mechanism, a transmission mechanism, a machine tool processing head assembly, and a machine tool, which can ensure the safety of the linkage mechanism during operation.

[0006] The first aspect of this utility model provides a linkage mechanism, including a first link, a second link, and a connecting shaft. One end of the first link and one end of the second link are stacked, and both ends of the first link and the second link are rotatably connected to the connecting shaft. The mechanism also includes a first sleeve, a second sleeve, a separator, and a locking nut. The first link is rotatably connected to the connecting shaft via the first sleeve, and the second link is rotatably connected to the connecting shaft via the second sleeve. The separator is sleeved on the connecting shaft and located between the first and second links. The connecting shaft includes a connector and a mounting rod fixedly connected to the connector. The mounting rod passes sequentially through the first sleeve and the second sleeve and is connected to the locking nut.

[0007] In some feasible implementations, the first socket is a bearing or bushing, the second socket is a bearing or bushing, and the first socket and the second socket are respectively located on both sides of the separator.

[0008] In some feasible embodiments, the connector is a roller structure, the diameter of the connector is larger than the diameter of the mounting rod, the end of the mounting rod away from the connector has a threaded portion, the locking nut is fixedly connected to the mounting rod through the threaded portion, and the first socket, the second socket, the first connecting rod and the second connecting rod are located between the connector and the locking nut.

[0009] The second aspect of this utility model provides a transmission mechanism, including a support frame, a guide plate slidably disposed on the support frame, a push plate slidably disposed on the support frame, and the aforementioned linkage mechanism. The other end of the first link is rotatably mounted on the support frame, and the other end of the second link is rotatably mounted on the push plate. The guide plate is inclinedly provided with a guide rail that slidably engages with the connector of the connecting shaft.

[0010] In some feasible implementations, the system further includes a mounting base, a fixing post, and a third connector. The mounting base is detachably connected to the support frame. The mounting base has a receiving groove, the fixing post is disposed in the receiving groove, and the other end of the first connecting rod is disposed in the receiving groove. The other end of the first connecting rod is rotatably connected to the fixing post through the third connector.

[0011] In some feasible implementations, a sleeve is also included, which is fixedly disposed at the other end of the first connecting rod. The sleeve and the fixed post are rotatably connected by the third sleeve. The third sleeve includes two parts, which are spaced apart along the axial direction of the fixed post and located between the sleeve and the fixed post. Both ends of the two third sleeves that are far apart from each other are provided with limiting protrusions that overlap with the sleeve.

[0012] The third fitting is a bearing or a bushing.

[0013] In some feasible implementations, a positioning key is also included between the mounting base and the support frame; both the mounting base and the support frame are provided with positioning grooves that cooperate with the positioning key.

[0014] The transmission mechanism further includes a guide mechanism, and the push plate is slidably connected to the support frame through the guide mechanism. The extension direction of the guide mechanism is parallel to the movement direction of the push plate.

[0015] In some feasible embodiments, the guide rail includes an inclined section and a horizontal section connected in sequence, the extension direction of the horizontal section being parallel to the extension direction of the guide mechanism, and the connector being slidably connected to the inclined section and the horizontal section.

[0016] The third aspect of this utility model provides a machine tool processing head assembly, including a spindle and a protective cover, the protective cover being slidably sleeved on the outer periphery of the spindle, and also including the aforementioned transmission mechanism, the support frame being a slide saddle, the spindle being slidably disposed on the slide saddle, the guide plate being fixedly disposed on the side of the spindle, and the push plate being fixedly connected to the protective cover.

[0017] The fourth aspect of this utility model provides a machine tool, including a base and a column, the column being disposed on the base, and also including the aforementioned machine tool processing head assembly, wherein the slide saddle is movably mounted on the column.

[0018] The aforementioned linkage mechanism, transmission mechanism, machine tool processing head assembly, and machine tool are provided with a first connecting rod, a second connecting rod, a connecting shaft, a first sleeve, a second sleeve, a separator, and a locking nut. One end of the first connecting rod overlaps with one end of the second connecting rod, and both ends of the first and second connecting rods are rotatably connected to the connecting shaft. The first connecting rod is rotatably connected to the connecting shaft via the first sleeve, and the second connecting rod is rotatably connected to the connecting shaft via the second sleeve. The separator is sleeved on the connecting shaft and located between the first and second connecting rods. The connecting shaft includes a connector and a mounting rod fixedly connected to the connector. The mounting rod passes sequentially through the first sleeve and the second sleeve and is connected to the locking nut.

[0019] By setting the first and second couplings, the sliding friction between the first and second links and the connecting shaft is avoided, reducing the torsional force applied to the front end of the connecting shaft when the first and second links close together or spread apart. This prevents the front end of the connecting shaft from bending or even breaking due to excessive torsional force, thus improving the stability and safety of the linkage mechanism. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a machine tool processing head assembly provided in one embodiment of the present invention.

[0022] Figure 2 This is a schematic diagram of a transmission mechanism provided in an embodiment of the present invention.

[0023] Figure 3This is a first cross-sectional view of a transmission mechanism provided in an embodiment of the present invention.

[0024] Figure 4 for Figure 3 An enlarged diagram of A in the diagram.

[0025] Figure 5 This is a second sectional view of a transmission mechanism provided in an embodiment of the present invention.

[0026] Figure 6 for Figure 5 Enlarged diagram of B in the diagram.

[0027] Component Symbol Explanation

[0028] 10. First connecting rod; 11. Sleeve; 20. Second connecting rod; 30. Connecting shaft; 31. Connector; 32. Mounting rod; Z1. First socket; Z2. Second socket; 40. Separator; 50. Locking nut; 100. Support frame; 200. Guide plate; 210. Guide rail; 211. Inclined section; 212. Horizontal section; 300. Push plate; 400. Mounting seat; 410. Receiving groove; 420. Positioning groove; 500. Fixing post; 510. Embedded part; 520. Mounting part; Z3. Third socket; Z31. Limiting protrusion; 600. Positioning key; 700. Guide mechanism; 800. Main shaft; 900. Protective cover.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] To provide a clearer and more accurate understanding of the present invention, a detailed description will now be provided in conjunction with the accompanying drawings. The accompanying drawings illustrate examples of embodiments of the present invention, wherein the same reference numerals denote the same elements. It is to be understood that the scale shown in the accompanying drawings is not the actual scale of the present invention, but is for illustrative purposes only and is not a drawing based on the original dimensions.

[0034] The linkage mechanism in the prior art includes two links and a fixed shaft. The two links are rotatably connected by a fixed shaft. The rotation directions of the two links relative to the fixed shaft are opposite. The rotation of the two links toward each other or toward each other applies a torsional force to the front end of the fixed shaft, causing the threaded part at the front end of the fixed shaft to bend, deform, or even break.

[0035] To ensure the stability and safety of the linkage mechanism during operation, please refer to... Figure 1 and 2 The first aspect of this utility model provides a linkage mechanism, including a first link 10, a second link 20, a connecting shaft 30, a first sleeve Z1, a second sleeve Z2, a separator 40, and a locking nut 50.

[0036] Please refer to Figure 2 and 3 The first link 10, the second link 20, and the connecting shaft 30 form the basic structure of the linkage mechanism. One end of the first link 10 and one end of the second link 20 are stacked, and both ends of the first link 10 and the second link 20 are rotatably connected to the connecting shaft 30. The first link 10 and the second link 20 can be brought closer to each other, so that the other end of the first link 10 is close to the other end of the second link 20, and the height of the linkage mechanism is increased. The first link 10 and the second link 20 can also be extended away from each other, so that the other end of the first link 10 is away from the other end of the second link 20, and the height of the linkage mechanism is reduced.

[0037] Please refer to Figure 3 and 4The first coupling Z1 and the second coupling Z2 work together to replace the contact sliding friction between the first connecting rod 10 and the second connecting rod 20 and the connecting shaft 30 with rolling friction, reducing friction and the torque on the front end of the connecting shaft 30, thus improving the stability and safety of the linkage mechanism during operation. Specifically, the first connecting rod 10 is rotatably connected to the connecting shaft 30 through the first coupling Z1, and the second connecting rod 20 is rotatably connected to the connecting shaft 30 through the second coupling Z2; the first coupling Z1 is a bearing or a bushing, and the second coupling Z2 is a bearing or a bushing.

[0038] Please refer to Figure 3 and 4 The separator 40 is used to separate the first connecting rod 10 from the second connecting rod 20, and also to separate the first socket Z1 from the second socket Z2, preventing interference between the first connecting rod 10 and the second connecting rod 20 along the axial direction of the connecting shaft 30, and also preventing interference between the first socket Z1 and the second socket Z2 along the axial direction of the connecting shaft 30. Specifically, the separator 40 is sleeved on the connecting shaft 30 and located between the first connecting rod 10 and the second connecting rod 20, with the first socket Z1 and the second socket Z2 located on opposite sides of the separator 40.

[0039] Please refer to Figure 4 The locking nut 50 cooperates with the connecting shaft 30 to install the first sleeve Z1 and the second sleeve Z2, as well as the first connecting rod 10 and the second connecting rod 20. It also restricts the first sleeve Z1, the second sleeve Z2, the first connecting rod 10, and the second connecting rod 20 along the axial direction of the connecting shaft 30, preventing them from detaching from the connecting shaft 30 and ensuring the structural stability of the linkage mechanism. Specifically, the connecting shaft 30 includes a connector 31 and a mounting rod 32 fixedly connected to the connector 31. The mounting rod 32 passes sequentially through the first sleeve Z1 and the second sleeve Z2 and is connected to the locking nut 50.

[0040] Please refer to Figure 4 The specific structure of the connecting shaft 30 is described below. The connecting head 31 has a roller structure and the diameter of the connecting head 31 is larger than the diameter of the mounting rod 32. The end of the mounting rod 32 away from the connecting head 31 has a threaded portion. The locking nut 50 is fixedly connected to the mounting rod 32 through the threaded portion. The first sleeve Z1, the second sleeve Z2, the first connecting rod 10, and the second connecting rod 20 are located between the connecting head 31 and the locking nut 50.

[0041] Please refer to Figure 2 and 3Since the first link 10 and the second link 20 in the linkage mechanism can close together in the direction of mutual approach and unfold in the direction of mutual distance, the first link 10 and the second link 20 can be closed and unfolded by driving the connecting shaft 30 to rotate, thereby turning the first link 10 and the second link 20 into a telescopic structure without power.

[0042] The aforementioned linkage mechanism includes a first link 10, a second link 20, a connecting shaft 30, a first sleeve Z1, a second sleeve Z2, a separator 40, and a locking nut 50. One end of the first link 10 overlaps with one end of the second link 20, and both ends of the first link 10 and the second link 20 are rotatably connected to the connecting shaft 30. The first link 10 is rotatably connected to the connecting shaft 30 via the first sleeve Z1, and the second link 20 is rotatably connected to the connecting shaft 30 via the second sleeve Z2. The separator 40 is sleeved on the connecting shaft 30 and located between the first link 10 and the second link 20. The connecting shaft 30 includes a connector 31 and a mounting rod 32 fixedly connected to the connector 31. The mounting rod 32 passes sequentially through the first sleeve Z1 and the second sleeve Z2 and is connected to the locking nut 50. By setting the first coupling Z1 and the second coupling Z2, the sliding friction between the first link 10 and the second link 20 and the connecting shaft 30 is avoided. This reduces the torsional force applied to the front end of the connecting shaft 30 when the first link 10 and the second link 20 are brought together in the direction of mutual approach and extended in the direction of mutual distance. This prevents the front end of the connecting shaft 30 from bending or even breaking due to excessive torsional force, and improves the stability and safety of the linkage mechanism.

[0043] Please refer to Figure 1 and 2 The second aspect of this utility model provides a transmission mechanism, including a support frame 100, a guide plate 200 slidably disposed on the support frame 100, a push plate 300 slidably disposed on the support frame 100, and the aforementioned linkage mechanism. The sliding direction of the push plate 300 is shown in [reference needed]. Figure 1 The sliding direction is indicated in the diagram. Since the transmission mechanism includes the aforementioned linkage mechanism, it possesses the corresponding technical effects of the linkage mechanism, which will not be elaborated upon here.

[0044] Please refer to Figure 1The support frame 100 provides installation space for the linkage mechanism. The guide plate 200 is inclinedly provided with a guide rail 210 that slidably engages with the connector 31 of the connecting shaft 30. Specifically, the guide rail 210 includes an inclined section 211 and a horizontal section 212 connected in sequence. The extension direction of the horizontal section 212 is parallel to the extension direction of the guide mechanism 700. The connector 31 is slidably connected to the inclined section 211 and the horizontal section 212. When the connector 31 slides within the inclined section 211, the connecting shaft 30 of the linkage mechanism rises upward and moves backward in the horizontal direction, or the connecting shaft 30 of the linkage mechanism lowers downward and moves forward in the horizontal direction. When the connector 31 slides within the horizontal section 212, the linkage mechanism maintains its existing shape without change.

[0045] Please refer to Figure 1 The other end of the first connecting rod 10, that is, the end away from the connecting shaft 30, is rotatably mounted on the support frame 100. The connection end of the first connecting rod 10 with the connecting shaft 30 and the second connecting rod 20 rotates with the connection end of the first connecting rod 10 with the support frame 100 as the center. The other end of the second connecting rod 20, that is, the end away from the connecting shaft 30, can both translate in the direction away from and towards the first connecting rod 10, and can also rotate synchronously during translation. Specifically, the other end of the second connecting rod 20 is rotatably mounted on the push plate 300, so that the movement of the second connecting rod 20 in the direction towards and away from the first connecting rod 10 drives the extension and retraction of the push plate 300.

[0046] Please refer to Figure 5 and 6 To facilitate the rotatable mounting of the other end of the first connecting rod 10 away from the connecting shaft 30 onto the support frame 100, the transmission mechanism further includes a mounting base 400, a fixing post 500, and a third connecting piece Z3. The mounting base 400 is detachably connected to the support frame 100. The mounting base 400 has a receiving groove 410, which can be U-shaped to maximize the space of the receiving groove 410 while ensuring the installation of the fixing post 500. The fixing post 500 is disposed within the receiving groove 410 and can be cylindrical. The other end of the first connecting rod 10 is disposed in the receiving groove 410, and the other end of the first connecting rod 10 is rotatably connected to the fixed column 500 through the third sleeve Z3. In this embodiment, the third sleeve Z3 is a bearing or bushing, which changes the friction between the other end of the first connecting rod 10 and the fixed column 500 to rolling friction, reducing the friction between the other end of the first connecting rod 10 and the fixed column 500, and ensuring that the first connecting rod 10 and the fixed column 500 rotate quickly and stably.

[0047] Please refer to Figure 6To increase the contact area between the first connecting rod 10 and the fixed column 500 along the axial direction of the fixed column 500, the transmission mechanism further includes a sleeve 11. The sleeve 11 is fixedly disposed at the other end of the first connecting rod 10. The sleeve 11 and the fixed column 500 are rotatably connected by the third sleeve Z3. Specifically, there are two third sleeves Z3. The two third sleeves Z3 are spaced apart along the axial direction of the fixed column 500 and located between the sleeve 11 and the fixed column 500 along the radial direction of the fixed column 500. By providing two third sleeves Z3, the third sleeves Z3 can be adaptively installed from both ends of the sleeve 11, which facilitates the installation of the third sleeves Z3.

[0048] Furthermore, each of the two third fittings Z3, located at opposite ends, is provided with a limiting protrusion Z31 that overlaps with the sleeve 11. The limiting protrusion Z31 is positioned between the mounting base 400 and the sleeve 11 along the axial direction of the fixing post 500, separating the rotatable sleeve 11 from the fixed mounting base 400 along the axial direction of the fixing post 500, thus preventing frictional contact between the sleeve 11 and the mounting base 400 and preventing wear on the sleeve 11 and the mounting base 400.

[0049] Please refer to Figure 6 To facilitate the installation of the mounting base 400 and the support frame 100, the fixing post 500 includes an embedding portion 510 that is embedded in the support frame 100 and a mounting portion 520 that is connected to the mounting base 400. In this embodiment, the embedding portion 510 includes two coaxial cylinders, the diameter of the cylinder closer to the support frame 100 being smaller than the diameter of the cylinder farther from the support frame 100. The support frame 100 is provided with an embedding groove that mates with the embedding portion 510, thereby facilitating the positioning and engagement of the mounting base 400 with the support frame 100 through the embedding portion 510 of the fixing post 500. The mounting portion 520 is also cylindrical, and its diameter is located between the diameters of the two coaxial cylinders of the embedding portion 510, thereby preventing the diameter of the mounting portion 520 from being too small and ensuring the stability of the connection between the mounting portion 520 and the mounting base 400.

[0050] Please refer to Figure 6To facilitate the quick installation of the mounting base 400 and the support frame 100, the transmission mechanism also includes a positioning key 600 disposed between the mounting base 400 and the support frame 100. Both the mounting base 400 and the support frame 100 are provided with positioning grooves 420 that engage with the positioning key 600. For example, the positioning key 600 is block-shaped, and the positioning groove 420 is elongated. The length of the positioning key 600 is shorter than the length of the positioning groove 420. In this way, after the mounting base 400 engages with the positioning key 600 and the positioning groove 420, it can also move along the extension direction of the positioning groove 420, which facilitates the positioning of the mounting base 400 relative to the support frame 100 along the vertical extension direction of the positioning groove 420. It can be understood that the extension direction of the positioning groove 420 can be the sliding direction of the push plate 300 or it can be vertical. Furthermore, the position of the mounting base 400 relative to the support frame 100 along the extension direction of the positioning groove 420 can be adjusted, so that the through hole on the mounting base 400 can be adjusted to the position corresponding to the threaded hole on the support frame 100, thereby facilitating the fastening bolt to pass through the through hole on the mounting base 400 and screw into the threaded hole on the support frame 100.

[0051] Please refer to Figure 2 and 5 To guide the push plate 300 to move relative to the support frame 100 along a predetermined straight line, the transmission mechanism further includes a guide mechanism 700. The push plate 300 is slidably connected to the support frame 100 via the guide mechanism 700, and the extension direction of the guide mechanism 700 is parallel to the movement direction of the push plate 300. Specifically, the guide mechanism 700 includes a guide rail and a slider. The extension direction of the guide rail is parallel to the movement direction of the push plate 300, and the slider is slidably connected to the guide rail. The guide rail is fixedly installed on one of the support frame 100 and the push plate 300, and the slider is installed on the other of the support frame 100 and the push plate 300. It can be understood that there can be one slider, but when the length of the push plate 300 along the movement direction is long, there can be at least two sliders, thereby allowing the push plate 300 to slide stably relative to the support frame 100.

[0052] A third aspect of this utility model provides a machine tool machining head assembly, including a spindle 800 and a protective cover 900. The protective cover 900 is slidably sleeved on the outer periphery of the spindle 800. It also includes the aforementioned transmission mechanism. The support frame 100 is a slide saddle, the spindle 800 is slidably mounted on the slide saddle, the guide plate 200 is fixedly mounted on the side of the spindle 800, and the push plate 300 is fixedly connected to the protective cover 900. Since the machine tool machining head assembly includes the aforementioned transmission mechanism, it also possesses the corresponding technical effects of the aforementioned transmission mechanism, which will not be elaborated further here.

[0053] The fourth aspect of this utility model provides a machine tool, including a base and a column, the column being disposed on the base, and also including the aforementioned machine tool machining head assembly, with the slide saddle being vertically and elliptically mounted on the column. Since the machine tool includes the aforementioned machine tool machining head assembly, it also possesses the corresponding technical effects of the aforementioned machine tool machining head assembly, which will not be elaborated further here.

[0054] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

[0055] The above-listed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A linkage mechanism, comprising a first link (10), a second link (20), and a connecting shaft (30), wherein one end of the first link (10) and one end of the second link (20) are stacked, and one end of the first link (10) and one end of the second link (20) are rotatably connected to the connecting shaft (30); characterized in that, It also includes a first socket (Z1), a second socket (Z2), a separator (40), and a locking nut (50). The first connecting rod (10) is rotatably connected to the connecting shaft (30) through the first socket (Z1), and the second connecting rod (20) is rotatably connected to the connecting shaft (30) through the second socket (Z2). The separator (40) is sleeved on the connecting shaft (30) and located between the first connecting rod (10) and the second connecting rod (20). The connecting shaft (30) includes a connector (31) and a mounting rod (32) fixedly connected to the connector (31). The mounting rod (32) passes through the first socket (Z1) and the second socket (Z2) in sequence and is connected to the locking nut (50).

2. The linkage mechanism as described in claim 1, characterized in that, The first socket (Z1) is a bearing or bushing, and the second socket (Z2) is a bearing or bushing. The first socket (Z1) and the second socket (Z2) are located on both sides of the separator (40).

3. The linkage mechanism as described in claim 1, characterized in that, The connector (31) has a roller structure and the diameter of the connector (31) is larger than the diameter of the mounting rod (32). The end of the mounting rod (32) away from the connector (31) has a threaded portion. The locking nut (50) is fixedly connected to the mounting rod (32) through the threaded portion. The first socket (Z1), the second socket (Z2), the first connecting rod (10), and the second connecting rod (20) are located between the connector (31) and the locking nut (50).

4. A transmission mechanism, comprising a support frame (100), characterized in that, It also includes a guide plate (200) slidably disposed on the support frame (100), a push plate (300) slidably disposed on the support frame (100), and a linkage mechanism as described in any one of claims 1-3, wherein the other end of the first link (10) is rotatably mounted on the support frame (100), and the other end of the second link (20) is rotatably mounted on the push plate (300); the guide plate (200) is inclinedly provided with a guide rail (210) that slidably engages with the connector (31) of the connecting shaft (30).

5. The transmission mechanism as described in claim 4, characterized in that, It also includes a mounting base (400), a fixing post (500), and a third connector (Z3). The mounting base (400) is detachably connected to the support frame (100). The mounting base (400) is provided with a receiving groove (410). The fixing post (500) is disposed in the receiving groove (410). The other end of the first connecting rod (10) is disposed in the receiving groove (410), and the other end of the first connecting rod (10) is rotatably connected to the fixing post (500) through the third connector (Z3).

6. The transmission mechanism as described in claim 5, characterized in that, It also includes a sleeve (11), which is fixedly disposed at the other end of the first connecting rod (10). The sleeve (11) and the fixed column (500) are rotatably connected through the third sleeve (Z3). The third sleeve (Z3) includes two, which are spaced apart along the axial direction of the fixed column (500) and located between the sleeve (11) and the fixed column (500). Both ends of the two third sleeves (Z3) that are far apart from each other are provided with limiting protrusions (Z31) that overlap with the sleeve (11). The third fitting (Z3) is a bearing or a bushing.

7. The transmission mechanism as described in claim 5, characterized in that, It also includes a positioning key (600) disposed between the mounting base (400) and the support frame (100); both the mounting base (400) and the support frame (100) are provided with positioning grooves (420) that are positioned and engaged with the positioning key (600); The transmission mechanism further includes a guide mechanism (700), and the push plate (300) is slidably connected to the support frame (100) through the guide mechanism (700). The extension direction of the guide mechanism (700) is parallel to the movement direction of the push plate (300).

8. The transmission mechanism as described in claim 7, characterized in that, The guide rail (210) includes an inclined section (211) and a horizontal section (212) connected in sequence. The extension direction of the horizontal section (212) is parallel to the extension direction of the guide mechanism (700). The connector (31) is slidably connected to the inclined section (211) and the horizontal section (212).

9. A machine tool machining head assembly, comprising a spindle (800) and a protective cover (900), wherein the protective cover (900) is slidably sleeved on the outer periphery of the spindle (800), characterized in that, It also includes the transmission mechanism as described in any one of claims 4-8, wherein the support frame (100) is a slide saddle, the main shaft (800) is slidably disposed on the slide saddle, the guide plate (200) is fixedly disposed on the side of the main shaft (800), and the push plate (300) is fixedly connected to the protective cover (900).

10. A machine tool, comprising a base and a column, wherein the column is disposed on the base, characterized in that, It also includes the machine tool processing head assembly as described in claim 9, wherein the slide saddle is elliptically mounted on the column.

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