A locking assembly and a vertical machining center equipped with the same

Abstract

The application relates to the technical field of machining equipment, in particular to a locking assembly and a vertical machining machine provided with the same, wherein the locking assembly comprises a clamping base, a brake assembly integrated on the clamping base and a clamping lever; the clamping base is sleeved on the outside of a vertical column and has circumferential discontinuous adjusting openings; the inner wall of the adjusting opening at one end of the clamping base is an arc surface structure; a brake insertion hole is arranged in the tangent direction of the arc surface structure; the brake insertion hole intersects with the arc surface inner wall of the clamping base, forms a cutout through the adjusting opening, and the brake assembly is accommodated in the brake insertion hole; the wedge-shaped curved surface of the brake assembly can abut against or be separated from the surface of the vertical column through the cutout, the mechanism integrated on the locking assembly is prevented from falling rapidly, and the locking is locked through the eccentric mechanism of the clamping lever. The application can feel the change of force during the locking process, effectively prevents false locking, and has the advantages of simple operation, high locking stability, strong reliability and the like.

Description

Technical Field

[0001] This application relates to the field of machining equipment technology, and in particular to a locking assembly and a vertical machining center equipped with the locking assembly. Background Technology

[0002] In the current booming development of the home handicraft industry, power tools have become the first choice for users due to their efficiency and convenience. Among them, vertical machining centers equipped with column structures occupy an important position due to their stable machining performance.

[0003] In existing technologies, taking column-mounted drilling rigs as an example, these rigs utilize the coordinated operation of core components such as the base, column, and support bridge to mount the complete drilling head onto the support bridge. Precise drilling is achieved by utilizing the vertical movement of the drilling head along the column. In actual operation, the drilling head feeds downwards during processing and returns to its original position after completion. This reciprocating motion greatly improves the efficiency and standardization of drilling operations. To ensure equipment safety and processing accuracy, vertical drilling rigs typically incorporate a stop unit on the column to limit the downward travel of the support bridge. For example, in the column-mounted machining center with application number 201110334589.5, especially in vertical drilling rigs, the stop unit employs a clamping hoop structure with slits. Radial contraction and fixation are achieved through a swingable clamping lever, ensuring stable mounting on the column. Simultaneously, the pressure spring design between the stop unit and the support bridge forces the support bridge to overcome spring force during processing, creating a buffer and resistance mechanism to ensure a smooth and controllable drilling process. However, in practical applications, when users need to adjust the axial position of the stop unit on the column, the support bridge will experience uncontrolled swaying motion under the spring force because the pressure spring is always in a compressed and stored state. This unstable motion not only seriously interferes with the operator's precise control over the drilling position and depth, resulting in a significant decrease in processing accuracy, but may also cause the drill head to shift, leading to workpiece scrap or damage to drilling machine components. Furthermore, frequent swaying motion will accelerate the wear of critical components, shorten the service life of the vertical drilling rig, and increase the user's maintenance costs and operational risks.

[0004] Therefore, there is an urgent need for a locking assembly with a stable structure and easy adjustment, as well as a vertical machining center equipped with such a locking assembly. Utility Model Content

[0005] The purpose of this application is to provide a locking assembly and a vertical machining center equipped with the locking assembly.

[0006] The embodiments of this application can be implemented through the following technical solutions:

[0007] A locking assembly is used for braking, clamping, or releasing on the surface of a column. The locking assembly includes a clamping base and a braking assembly. The clamping base is sleeved on the outside of the column and has a circumferentially discontinuous adjustment opening. The inner wall of the clamping base at the end with the adjustment opening has an arc-shaped structure. A braking insertion hole is provided in the tangential direction of the arc-shaped structure. The braking insertion hole intersects with the arc-shaped inner wall of the clamping base to form a cut that communicates with the adjustment opening.

[0008] The braking component is housed in the braking socket, and its surface that mates with the cut is provided with a wedge-shaped curved surface. By adjusting the positioning position of the braking component in the braking socket, the wedge-shaped curved surface of the braking component can pass through the cut and abut or separate from the surface of the column.

[0009] Furthermore, the brake insertion hole is located in the tangential direction of the adjustment opening, and two cuts are formed on the inner wall of the clamping base that are axially penetrating the center, respectively located on both sides of the adjustment opening.

[0010] Furthermore, the braking assembly is a split structure housed within the braking socket, with each of its two split structural components having a wedge-shaped curved surface, the two wedge-shaped curved surfaces gradually narrowing towards the center of the adjustment opening.

[0011] Furthermore, the braking assembly includes an adjusting screw, a positioning nut, and two cylindrical braking blocks;

[0012] The circumferential surface of the brake block is provided with a wedge-shaped curved surface. The two brake blocks are respectively housed in two axially discontinuous insertion holes that are divided by the adjustment opening of the brake insertion hole, and the wedge-shaped curved surface is set towards the cut.

[0013] The brake block is provided with an axially penetrating through hole. One end of the adjusting screw is positioned at the end of the brake insertion hole, and the other end passes through the axial through holes of the two brake blocks in sequence and is connected to the positioning nut.

[0014] Furthermore, the brake block also includes an elastic component, which is sleeved outside the adjusting screw and abuts against the adjusting screw and the end of the brake block.

[0015] Furthermore, the wedge-shaped surface is adapted to the outer surface of the column.

[0016] Furthermore, it also includes a clamping lever, which shares a clamping base with the braking assembly. The clamping lever is connected through the adjustment opening. By adjusting the opening of the adjustment opening, the clamping base can clamp or release the column in the radial direction.

[0017] Furthermore, the clamping base is provided with a locking hole parallel to the brake hole, and the clamping lever is composed of a locking screw, a locking nut, a positioning base and a rotating handle; one end of the locking screw is eccentrically hinged to the rotating handle, the outer surface of the eccentric end of the rotating handle and the positioning groove of the positioning base located at one end of the locking hole are engaged and abutted, and the locking screw passes through the locking hole and is connected to the locking nut located at the other end.

[0018] This application also provides a vertical machining center equipped with the locking assembly described above, and further includes a column and a base connected to its bottom. A support frame that can move up and down along the axial direction of the column is installed on the column. A working device is connected to one side of the support frame. The locking assembly is connected to the bottom of the support frame, and the bottom of the top of the support frame is connected to the locking assembly via a return spring.

[0019] Furthermore, a rack extending axially is provided on one side of the support frame, and the working device meshes with the rack via a transmission device.

[0020] The locking assembly and vertical machining center equipped with the assembly provided in the embodiments of this application have at least the following beneficial effects:

[0021] The locking assembly in this application integrates locking and braking functions. On one hand, the opening of the clamping base's adjustment opening can be adjusted via a clamping lever to clamp or release the column in the radial direction. On the other hand, the arc-shaped surface structure of the inner wall of the clamping base's adjustment opening, in conjunction with the braking socket and braking assembly, allows the wedge-shaped surface of the braking assembly to be adjusted according to the positioning position, contacting or separating from the column surface. When the wedge-shaped surface contacts the column, even if the clamping base is released, the support frame and working device will not fall rapidly due to their own weight, effectively preventing accidents and ensuring operational safety. It boasts advantages such as simple structure, strong practicality, and high stability.

[0022] Regarding the braking function, this application adopts a force application method with the force applied in the tangential direction of the brake socket, which can make the force direction of the braking component work in coordination with the radial contraction force of the clamping base, avoiding mutual cancellation of forces and improving the overall locking stability. The wedge-shaped curved surface adapts to the curved contour of the outer surface of the column, which can form a progressive surface contact during braking. Compared with point contact or line contact, it effectively increases the friction area and ensures the braking reliability under vibration load.

[0023] Regarding the locking function, the locking design of this application has outstanding advantages and significant optimization in preventing false locking. The eccentric hinge structure accurately converts the rotational force into the axial displacement of the locking screw. Combined with the positioning base and positioning groove, it ensures stable and accurate locking. The eccentric mechanism of the clamping lever allows the operator to clearly feel the change in locking force and stop the operation in time to avoid false locking. It also has a self-adjusting capability. If the locking force changes after locking, the displacement can be finely adjusted to maintain stability. The operator can detect and deal with potential false locking problems through force feedback, which greatly improves the reliability of locking. Attached Figure Description

[0024] Figure 1 , Figure 2 This is a schematic diagram of the overall structure of a locking assembly and a vertical machining center equipped with the locking assembly from different perspectives.

[0025] Figure 3 This is a schematic diagram of the overall structure of the locking assembly in this application;

[0026] Figure 4 This is a schematic diagram of the overall structure of the clamping base in this application;

[0027] Figure 5 This is a schematic diagram showing the disassembled state of the braking assembly in this application;

[0028] Figure 6 This is a cross-sectional view of the locking assembly and the column in the locked state in this application;

[0029] Figure 7 This is a schematic diagram of the overall structure of the clamping lever in this application.

[0030] Numbers in the diagram

[0031] 1-Support frame; 10-Column; 11-Base; 12-Rack; 2-Locking assembly; 20-Adjusting opening; 201-Brake socket; 202-Slit; 203-Locking socket; 21-Clamping base; 22-Clamping lever; 221-Locking screw; 222-Locking nut; 223-Positioning base; 2230-Positioning groove; 224-Rotating handle; 23-Brake assembly; 24-Positioning groove; 230-Wedge-shaped surface; 231-Adjusting screw; 232-Positioning nut; 233-Brake block; 234-Elastic component; 3-Working device; 4-Return spring; 5-Transmission device. Detailed Implementation

[0032] The present application will now be further described based on preferred embodiments and with reference to the accompanying drawings.

[0033] Furthermore, for ease of understanding, various components on the drawings have been enlarged or reduced, but this is not intended to limit the scope of protection of this application.

[0034] Singular forms of words also include plural meanings, and vice versa.

[0035] In the description of the embodiments of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use, they are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In addition, in the description of this application, in order to distinguish different units, the terms "first," "second," etc. are used in this specification, but these are not limited by the manufacturing order, nor should they be construed as indicating or implying relative importance. Their names may differ in the detailed description and claims of this application.

[0036] The vocabulary used in this specification is for illustrative purposes and is not intended to limit the scope of this application. It should also be noted that, unless otherwise expressly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection via an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of these terms in this application.

[0037] like Figures 1 to 3 As shown, a vertical machining center includes a column 10 and a base 11 connected to its bottom. A support frame 1, which can move up and down along the axial direction of the column 10, is installed on the column 10. A locking assembly 2 and a working device 3, which can move up and down synchronously with the support frame 1, are connected to the support frame 1. The locking assembly 2 includes a clamping base 21 and a clamping lever 22 sleeved on the outside of the column 10. The clamping base 21 has a circumferentially discontinuous adjustment opening 20. The clamping lever 22 passes through the adjustment opening 20. By adjusting the opening of the adjustment opening 20, the clamping base 21 is adjusted to clamp the outside of the column 10 in the radial direction, thereby locking the connection position of the locking assembly 2 sleeved on the outside of the column 10 and fixing the connection position of the support frame 1 and the working device 3.

[0038] Furthermore, the clamping base 21 is provided with an inner wall that is arc-shaped at one end of the adjustment opening 20. A brake insertion hole 201 is provided along the tangent of this arc-shaped structure, intersecting with it. The brake insertion hole 201 intersects the inner wall of the arc-shaped surface of the clamping base 21. A brake assembly 23 is housed within the brake insertion hole 201. The surface of the brake assembly 23 that mates with the cutout 202 is provided with a wedge-shaped curved surface 230. By adjusting the positioning position of the brake assembly 23 within the brake insertion hole 201, the wedge-shaped curved surface 230 of the brake assembly 23 passes through the... When the cut 202 abuts or separates from the surface of the column 10, even if the clamping base 21 is released by the clamping lever 22, the support frame 1 and the working device 3 will not move rapidly downward along the axial direction of the column 10 under their own gravity, effectively preventing rapid fall under adverse conditions. In addition, since the abutting force provided by the braking component 23 is a continuous rigid force, compared with the pressure spring force in the prior art, it can effectively prevent the support frame 1 and the working device 3 from producing uncontrolled swaying motion under the elastic force of the pressure spring.

[0039] In some preferred embodiments, the clamping lever 22 and the braking component 23 can be respectively disposed on two independent locking components 2. Their specific structural forms are not further limited here. Preferably, in order to simplify the structure and facilitate operation, the clamping lever 22 and the braking component 23 can be integrated on the same locking component 2. However, this arrangement is only an illustrative example and is not a limitation on the technical solution of this application.

[0040] For ease of description, the following detailed description will be based on the example of the clamping lever 22 and the braking assembly 23 sharing a single clamping base 21.

[0041] In some preferred embodiments, as shown in the figure, the brake insertion hole 201 is located in the tangential direction of the adjustment opening 20, and forms two cuts 202 respectively on both sides of the adjustment opening 20 on the inner wall that is axially connected to the clamping base 21. The extension direction of the cuts 202 forms an acute angle with the radial plane of the column 10, forming a guide channel that gradually narrows from the outside to the inside.

[0042] In some preferred embodiments, the braking assembly 23 is a split structure housed within the braking socket 201. The two split structural components are respectively provided with wedge-shaped curved surfaces 230. The two wedge-shaped curved surfaces 230 gradually narrow towards the center of the adjustment opening 20. By applying force in the tangential direction of the braking socket 201, the force direction of the braking assembly is coordinated with the radial contraction force of the clamping base, avoiding mutual cancellation of forces and improving the overall locking stability.

[0043] In some preferred embodiments, such as Figure 5 As shown, the braking assembly 23 includes an adjusting screw 231, a positioning nut 232, and two columnar brake blocks 233. The wedge-shaped curved surfaces 230 are respectively disposed on the circumferential surfaces of the brake blocks 233. The two brake blocks 233 are respectively accommodated in two axially discontinuous insertion holes of the brake insertion hole 201 divided by the adjusting opening 20. The wedge-shaped curved surfaces 230 are disposed facing the cutout 202, so that the two brake blocks 233 can move axially. The braking or locking function is realized by the interaction between the wedge-shaped curved surfaces 230 and the structure where the cutout 202 is located.

[0044] In some preferred embodiments, such as Figure 6 As shown, the brake block 233 is provided with an axially penetrating through hole. One end of the adjusting screw 231 is positioned at the end of the brake insertion hole 201, and the other end passes through the axial through holes of the two brake blocks 233 in sequence and is fixedly connected to the positioning nut 232. By adjusting the connection position between the adjusting screw 231 and the positioning nut 232, the two brake blocks 233 can be moved toward or away from the adjusting opening 20, thereby adjusting the radial displacement of the wedge-shaped surface of each brake block 233 at the corresponding cut 202.

[0045] In some preferred embodiments, such as Figure 6 As shown, the wedge-shaped surface 230 is adapted to the outer surface of the column 10, so that the wedge-shaped surface 230 passes through the cut 202 and has a wrapping progressive surface contact with the surface of the column 10, which effectively increases the stability of the braking friction force and ensures the braking reliability under vibration load.

[0046] In some preferred embodiments, the brake block 233 further includes an elastic component 234. Preferably, the elastic component 234 is a spring. The elastic component 234 is sleeved outside the adjusting screw 231 and abuts between the adjusting screw 231 and the end of the brake block 233. It is used to provide a buffering effect during the displacement of the brake block 233, reduce braking impact, and assist the brake block 233 to return to the initial position after the adjustment is released, so as to ensure the stability and reliability of the operation of the braking assembly 23.

[0047] In some preferred embodiments, such as Figure 4 , Figure 7As shown, the clamping base 21 is provided with a locking hole 203 parallel to the brake hole 201. The clamping lever 22 includes a locking screw 221, a locking nut 222, a positioning base 223, and a rotating handle 224. One end of the locking screw 221 is eccentrically hinged to the rotating handle 224. The outer surface of the eccentric end of the rotating handle 224 abuts against the positioning groove 2230 of the positioning base 223. The positioning base 223 is positioned at the locking hole 201. At one end of 3, the locking screw 221 passes through the locking socket 203 and is connected to the locking nut 222. The locking nut 222 is positioned at the other end of the locking socket 203 and is used to convert the rotational force into the axial displacement of the locking screw 221 by rotating the rotating handle 224 using the eccentric hinge structure, thereby realizing a quick and convenient locking operation on the relevant components. At the same time, the cooperation between the positioning base 223 and the positioning groove 2230 ensures the stability and accuracy of the locking process.

[0048] It should be emphasized that the locking design of this application has significant advantages in preventing false locking and has been optimized. The eccentric hinge structure accurately converts the rotational force into the axial displacement of the locking screw 221, and the high-precision fit between the positioning base 223 and the positioning groove 2230 ensures a stable and accurate locking process.

[0049] The eccentric mechanism of the clamping lever is key to preventing false locking. During operation, as the lever rotates, the change in eccentricity gradually increases the locking force, and the operator can clearly feel the change in resistance. When the lever is fully locked, the resistance increases significantly. This intuitive force feedback allows the operator to stop operation in time, effectively preventing false locking.

[0050] Furthermore, this design possesses self-adjusting capabilities. If the locking force changes slightly due to external factors after locking, the eccentric mechanism and positioning system will finely adjust the displacement of the locking screw 221 to maintain stable locking. When the operator operates again, they can detect changes through force feedback, promptly addressing potential loose locking issues and significantly improving locking reliability.

[0051] In some preferred embodiments, such as Figure 1 , Figure 2 As shown, the support frame 1 is sleeved on the outside of the column 10, the locking assembly 2 is connected to the bottom of the support frame 1, and the bottom of the top of the support frame 1 is connected to the locking assembly 2 through a return spring 4. The upper part of the locking assembly 2 is provided with a positioning groove 24 for positioning the return spring 4, so that the locking assembly 2 is adjustablely held on the column 10 in the vertical direction, and the weight of the support frame 1 and the working device 3 is borne by the return spring 4.

[0052] In some preferred embodiments, a rack 12 extending axially is provided on one side of the support frame 1, and the working device 3 meshes with the rack 12 through a transmission device 5. Under the action of the transmission device 5, the working device 3 can move up and down along the rack 12.

[0053] In some preferred embodiments, the transmission device 5 includes a gear disposed relative to the rack 12. The gear is connected to the handle via a drive shaft. Rotating the handle can drive the gear to move up and down relative to the rack 12 via the drive shaft. The specific transmission method is a conventional setting in the art and will not be described in detail here.

[0054] In some preferred embodiments, the working device 3 is a drilling machine or a milling machine, and its specific form is not further limited here.

[0055] The above provides a detailed description of the specific embodiments of this application. For those skilled in the art, various improvements and modifications can be made to this application without departing from the principles of this application, and such improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A locking assembly for braking, clamping, or releasing on the surface of a column (10), characterized in that: The locking assembly (2) includes a clamping base (21) and a braking assembly (23); The clamping base (21) is sleeved on the outside of the column (10) and has a circumferentially discontinuous adjustment opening (20). The inner wall of the clamping base (21) with the adjustment opening (20) is an arc surface structure. A brake insertion hole (201) is provided in the tangential direction of the arc surface structure. The brake insertion hole (201) intersects with the arc surface inner wall of the clamping base (21) to form a cut (202) that is in communication with the adjustment opening (20). The braking assembly (23) is housed in the braking socket (201), and its surface that mates with the cut (202) is provided with a wedge-shaped curved surface (230). By adjusting the positioning position of the braking assembly (23) in the braking socket (201), the wedge-shaped curved surface (230) of the braking assembly (23) can pass through the cut (202) and abut or separate from the surface of the column (10).

2. The locking assembly according to claim 1, characterized in that: The brake insertion hole (201) is located in the tangential direction of the adjustment opening (20), and two cuts (202) are formed on the inner wall of the clamping base (21) that are axially penetrating the adjustment opening (20), respectively located on both sides of the adjustment opening (20).

3. The locking assembly according to claim 2, characterized in that: The braking assembly (23) is a split structure housed in the braking socket (201). The two split structural components are respectively provided with wedge-shaped curved surfaces (230), and the two wedge-shaped curved surfaces (230) gradually narrow towards the center of the adjustment opening (20).

4. The locking assembly according to claim 3, characterized in that: The braking assembly (23) includes an adjusting screw (231), a positioning nut (232), and two columnar brake blocks (233). The brake block (233) has a wedge-shaped curved surface (230) on its circumferential surface. The two brake blocks (233) are respectively housed in two axially discontinuous insertion holes of the brake insertion hole (201) divided by the adjustment opening (20), and the wedge-shaped curved surface (230) is set towards the cutout (202). The brake block (233) is provided with an axial through hole. One end of the adjusting screw (231) is positioned at the end of the brake insertion hole (201), and the other end passes through the axial through holes of the two brake blocks (233) in sequence and is connected to the positioning nut (232).

5. The locking assembly according to claim 4, characterized in that: The brake block (233) further includes an elastic component (234), which is sleeved on the outside of the adjusting screw (231) and abuts against the end of the adjusting screw (231) and the brake block (233).

6. The locking assembly according to claim 1, characterized in that: The wedge-shaped surface (230) is adapted to the outer surface of the column (10).

7. The locking assembly according to claim 1, characterized in that: It also includes a clamping lever (22), which shares a clamping base (21) with the braking assembly (23). The clamping lever (22) is connected through the adjustment opening (20). By adjusting the opening of the adjustment opening (20), the clamping base (21) can clamp or release the column (10) in the radial direction.

8. The locking assembly according to claim 7, characterized in that: The clamping base (21) is provided with a locking socket (203) parallel to the brake socket (201). The clamping lever (22) is composed of a locking screw (221), a locking nut (222), a positioning base (223), and a rotating handle (224). One end of the locking screw (221) is eccentrically hinged to the rotating handle (224). The outer surface of the eccentric end of the rotating handle (224) and the positioning groove (2230) of the positioning base (223) located at one end of the locking socket (203) are engaged and abutted. The locking screw (221) passes through the locking socket (203) and is connected to the locking nut (222) located at the other end.

9. A vertical machining center, equipped with a locking assembly (2) as described in any one of claims 1-8, characterized in that: It also includes a column (10) and a base (11) connected to its bottom. A support frame (1) that can move up and down along the axial direction of the column (10) is installed on the column (10). A working device (3) is connected to one side of the support frame (1). The locking assembly (2) is connected to the bottom of the support frame (1) and the bottom of the top of the support frame (1) is connected to the locking assembly (2) through a return spring (4).

10. The vertical machining center according to claim 9, characterized in that: The support frame (1) is provided with a rack (12) extending along its axial direction on one side, and the working device (3) meshes with the rack (12) through the transmission device (5).

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