Pressing mechanism for pressing workpiece

Abstract

The utility model relates to a pressing mechanism for pressing a workpiece, which is matched with a positioning seat on a working table and comprises a pressing head, a pressing rod, a pressing rod and a pressing rod, the pressing head comprises an acting end and a base end, and a clamping space for clamping the workpiece to be processed is formed between the acting end and the positioning seat; the driving source is connected with the base end of the pressing head and used for driving the acting end of the pressing head to clamp or loosen the workpiece to be machined; an adjusting piece is arranged at the acting end of the pressing head and can adjust the rotation freedom degree of a pressing point of the acting end relative to the axis Z of the positioning base and / or the movement freedom degree of the pressing point of the acting end in the direction perpendicular to the axis Z or in the direction with an included angle, so that the projection of the pressing point and the fulcrum of the positioning base on the workpiece can coincide. Compared with the prior art, the device has the advantages that an operator can simply move the translation adjusting assembly and the circumferential adjusting assembly in a small range, the pressing point for pressing the workpiece is changed corresponding to the fulcrum of the supporting seat, and the workpiece is prevented from being crushed.

Description

Technical Field

[0001] The utility model relates to the technical field of positioning fixtures, in particular to a clamping mechanism for clamping a workpiece. Background Art

[0002] In the processing of automotive parts, it is often necessary to use a clamping mechanism to clamp the workpiece on the processing table. For example, when processing a battery box, the applicant has applied for a Chinese utility model patent with patent number ZL202220584668.5 (authorization announcement number CN216463217U) entitled "A battery box processing and fixing fixture". It discloses a clamping mechanism, which includes a clamping head for clamping and an articulated seat for hinged connection of the clamping head. A driving source for driving the clamping head to clamp or release the workpiece is also provided under the articulated seat. Correspondingly, the clamping mechanism needs to cooperate with the supporting mechanism to clamp the battery box. If the workpiece is a thin-walled part, the projections of the pressure point of the clamping mechanism and the fulcrum of the supporting mechanism on the workpiece do not overlap, which easily causes deformation of the thin-walled part. For this reason, it is necessary to further improve the existing clamping mechanism. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a clamping mechanism for clamping a workpiece, which can adjust the overlap of a pressure point relative to a fulcrum, in view of the above-mentioned existing technical status.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: the clamping mechanism for clamping the workpiece cooperates with the positioning seat located on the workbench, and includes:

[0005] A clamping head, the clamping head comprising an active end and a base end, a clamping space for clamping a workpiece to be processed is formed between the active end and the positioning seat;

[0006] A driving source is connected to the base end of the clamping head and is used to drive the active end of the clamping head to clamp or release the workpiece to be processed; characterized in that:

[0007] An adjusting member is provided on the active end of the clamping head, and the adjusting member can adjust the rotational freedom of the pressure point of the active end relative to the axis Z of the positioning seat and / or the movement freedom in a direction perpendicular to or at an angle to the axis Z, so as to achieve the overlap of the projection of the pressure point and the fulcrum of the positioning seat on the workpiece.

[0008] In order to facilitate the operator to adjust the pressure point of the action end on the adjusting member, preferably, a pressing member is arranged in the adjusting member, and the pressing member includes a lower section protruding downward from the action end of the pressing head as a pressure point and a lower section protruding upward from the action end of the pressing head as a pressure point.

[0009] The active end of the clamping head is used as the upper section of the adjustment point. The active end of the clamping head is directly transferred to the lower section of the clamping piece, so that when adjusting, the operator only needs to grasp the upper section of the clamping piece to change its freedom of movement relative to the adjustment piece or follow the rotational freedom of the adjustment piece, and finally realize that the projection of the clamping point and the fulcrum of the positioning seat on the workpiece can coincide.

[0010] Furthermore, the pressing member also includes a middle section located between the upper section and the lower section, and correspondingly, the adjusting member is provided with a moving channel for the middle section to be inserted and move according to the corresponding degree of freedom of movement. Due to the setting of the moving channel, the pressing member can move on the adjusting member perpendicular to or at an angle to the axis Z, thereby changing the relative position of the pressure point.

[0011] In order to enable the clamping piece to have rotational freedom on the adjusting piece relative to the axis Z of the positioning seat, preferably, the adjusting piece is cylindrical, and correspondingly, the active end of the clamping head is provided with a mounting hole matching the shape of the adjusting piece, and the adjusting piece can rotate along the axis Z along the peripheral edge of the hole wall of the mounting hole.

[0012] In order to lock the final position of the pressure point after the pressure point of the clamping member is adjusted to coincide with the projection of the fulcrum of the positioning seat on the workpiece, preferably, the upper section of the clamping member that is exposed outside the adjusting member is partially provided with a thread and cooperates with a locking nut to lock the clamping member in the adjusted position.

[0013] In order to prevent the clamping piece itself from rotating when the operator adjusts the pressure point position or uses a locking nut to lock the clamping piece, thereby facilitating the operator's work, preferably, planar ends parallel to the axis Z are provided on both sides of the middle section of the clamping piece, and the planar ends are in contact with the inner wall of the movable channel, thereby limiting the clamping piece to rotate only along the axis Z together with the adjusting piece.

[0014] Furthermore, the end surface of the lower section of the pressing member is an arc surface. This design can avoid the generation of a surface angle between the pressing point and the workpiece, so that the workpiece is not easily deformed due to uneven force after being pressed.

[0015] As a driving method of the clamping head, preferably, the clamping mechanism is a lever cylinder, the driving source is a cylinder, and the base end of the clamping head is connected to a piston rod, the lower end of the piston rod is located inside the cylinder body, and the upper end extends out of the cylinder body and is connected to the base end.

[0016] Compared with the prior art, the advantage of the utility model is that the operator can use the adjusting part to conveniently and accurately adjust the pressure point of the clamping head within a small range, mainly by adjusting the position along a straight line perpendicular to the axis Z or at a certain angle to the axis Z or by rotating along the axis Z, so as to finally achieve the overlap of the projection of the fulcrum of the positioning seat on the workpiece, avoiding the situation where the workpiece is damaged due to uneven force. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the embodiment of the utility model in cooperation with the positioning seat;

[0018] Figure 2 It is a schematic diagram of the structural decomposition of an embodiment of the utility model;

[0019] Figure 3 This is an exploded schematic diagram of the adjusting member, the pressing member and the locking nut in the embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure when the pressing member is assembled in the adjusting member in the embodiment of the utility model;

[0021] Figure 5 This is a schematic structural diagram of a pressing head in an embodiment of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the lever cylinder in the embodiment of the utility model when the positioning seat clamps the workpiece. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below with reference to the accompanying drawings.

[0024] like Figures 1 to 6 The figure shows the best embodiment of the utility model. The clamping mechanism for clamping the workpiece in this embodiment is used in conjunction with the positioning seat 5 located on the workbench, and is described by taking a lever cylinder as an example:

[0025] Specifically, the driving source of the clamping mechanism is a cylinder 6 having a piston rod 61 and a clamping head 1, wherein the lower end of the piston rod 61 is located inside the cylinder body, such as Figure 5 As shown, the clamping head 1 has an active end 11 and a base end 12, and the base end 12 of the clamping head 1 is connected to the upper end of the piston rod 61, and as shown in Figure 1 As shown, a clamping space 41 for clamping the workpiece 4 to be processed is formed between the action end 11 and the positioning seat 5. Figure 6 As shown, the cylinder 6 drives the effective end 11 of the clamping head 1 through the piston rod 61 to clamp or release the workpiece 4 to be processed.

[0026] like Figure 2As shown, an adjusting member 2 is provided on the active end of the pressing head 1, and a pressing member 22 is provided inside the adjusting member 2. Figure 2 to Figure 4 As shown, the pressing member 22 includes a lower section 221 that protrudes downward from the active end 11 of the pressing head 1 as a pressing point, an upper section 223 that protrudes upward from the active end 11 of the pressing head 1 as an adjustment point, and a middle section 222 located between the upper section 223 and the lower section 221. Correspondingly, as shown in Figure 2 to Figure 4 As shown, a moving channel 21 is provided in the adjusting member 2 for the middle section 222 to be inserted and move according to the corresponding degree of freedom, so that the pressing member 22 can have the freedom to move perpendicularly or at an angle to the axis Z on the adjusting member 2.

[0027] The adjusting member 2 of this embodiment is cylindrical, and correspondingly, the active end 11 of the clamping head 1 is provided with a mounting hole 13 that matches the shape of the adjusting member 2. The adjusting member 2 can rotate along the peripheral edge of the hole wall of the mounting hole 13 along the axis Z, so that the clamping member 22 can have a rotational freedom relative to the axis Z of the positioning seat 5 on the adjusting member 2, such as the D1 direction. Therefore, the pressure point on the lower section 221 of the clamping member 22 can be rotated and adjusted within the cross-sectional projection of the adjusting member 2, and can also be adjusted linearly perpendicularly or at an angle to the axis Z, so the contact position of the pressure point with the workpiece 4 to be processed can be changed within a certain range, that is, any point of the circular surface projection formed on the workpiece 4 to be processed with the moving channel 21 as the diameter such as the D2 direction and the axis Z as the rotation center, so that the projection of the pressure point and the fulcrum 51 of the positioning seat 5 on the workpiece 4 to be processed can be overlapped through adjustment.

[0028] like Figure 3 to Figure 5 As shown, the upper section 223 of the clamping member 22 is partially exposed to the adjusting member 2 and is provided with threads, which are threadedly connected to the locking nut 3. Through the cooperation between the lower section 221, the upper section 223 and the locking nut 3, the clamping member 22 can be locked on the clamping head 1 after it moves to coincide with the projection of the fulcrum 51 of the positioning seat 5 on the workpiece 4 to be processed.

[0029] In order to prevent the pressing member 22 from rotating in the adjusting member when adjusting the pressure point position or locking the pressing member 22 with the locking nut 3, so as to facilitate the work of the operator, the middle section 222 of the pressing member 22 is provided with plane ends 2221 parallel to the axis Z on both sides, and the plane ends 2221 are in contact with the inner wall of the moving channel 21, thereby limiting the pressing member 22 to rotate only along the axis Z together with the adjusting member 2. In addition, in order to facilitate installation, the plane ends 2221 can also extend to both sides of the upper section 223 of the pressing member 2, so that the pressing member 22 can directly enter the moving channel 21 during assembly, instead of disassembling the adjusting member 2 and then installing the pressing member 2 and the adjusting member 2 in combination.

[0030] When the manufacturing precision of the clamping member 22 is insufficient, the end surface 2211 of the lower section 221 may form an inclined surface and may have a surface angle with the workpiece 4, which may easily cause the workpiece 4 to be processed to be deformed due to uneven force after being clamped. Figure 3 , Figure 6 As shown, in this embodiment, the end surface 2211 of the lower section 221 of the pressing member 22 is configured as an arc surface, so that it is in point contact with the workpiece 4 to be processed to avoid deformation of the workpiece 4 to be processed.

[0031] Finally, in summary, when the present clamping mechanism is in use, the operator places the workpiece 4 to be processed on the positioning seat 5, aligns the clamping head 1 with the workpiece 4 to be processed, and adjusts the clamping member 22 to a suitable position corresponding to the fulcrum 51 of the positioning seat 5 according to the fulcrum 51 of the positioning seat 5, and then uses the locking nut 3 to lock the clamping member 22 on the clamping head 1, so that the operation of clamping the workpiece 4 to be processed can begin.

Claims

1. A clamping mechanism for clamping a workpiece, cooperating with a positioning seat located on a workbench, comprising: A clamping head (1), the clamping head (1) comprising an active end (11) and a base end (12), a clamping space (41) for clamping a workpiece (4) to be processed is formed between the active end (11) and the positioning seat (5); A driving source connected to the base end (12) of the clamping head (1) and used to drive the action end (11) of the clamping head (1) to clamp or release the workpiece (4) to be processed; Features: An adjusting member (2) is provided on the active end (11) of the clamping head (1), and the adjusting member (2) can adjust the rotational freedom of the pressure point of the active end (11) relative to the axis Z of the positioning seat (5) and / or the movement freedom in a direction perpendicular to or at an angle to the axis Z, so as to achieve the overlap of the projection of the pressure point and the fulcrum (51) of the positioning seat (5) on the workpiece (4).

2. The clamping mechanism for clamping a workpiece according to claim 1, characterized in that: A clamping member (22) is arranged inside the adjusting member (2), and the clamping member (22) includes a lower section (221) protruding downward from the working end (11) of the clamping head (1) to serve as a pressure point, and an upper section (223) protruding upward from the working end (11) of the clamping head (1) to serve as an adjusting point.

3. The clamping mechanism for clamping a workpiece according to claim 2, characterized in that: The pressing member (22) further comprises a middle section (222) located between the upper section (223) and the lower section (221); correspondingly, the adjusting member (2) is provided with a moving channel (21) for the middle section (222) to be inserted and move according to the corresponding degree of freedom.

4. The clamping mechanism for clamping a workpiece according to claim 3, characterized in that: The adjusting member (2) is cylindrical, and correspondingly, the active end (11) of the clamping head (1) is provided with a mounting hole (13) matching the shape of the adjusting member (2), and the adjusting member (2) can rotate along the peripheral edge of the hole wall of the mounting hole (13) along the axis Z.

5. The clamping mechanism for clamping a workpiece according to claim 3 or 4, characterized in that: The upper section (223) of the clamping member (22) that is exposed outside the adjusting member (2) is provided with a thread and cooperates with a locking nut (3) to lock the clamping member (22) at the adjusted position.

6. The clamping mechanism for clamping a workpiece according to claim 5, characterized in that: Plane ends (2221) parallel to the axis Z are provided on both sides of the middle section (222) of the clamping member (22), and the planar ends (2221) are in contact with the inner wall of the movable channel (21), thereby limiting the clamping member (22) to rotate only along the axis Z together with the adjusting member (2).

7. The clamping mechanism for clamping a workpiece according to claim 6, characterized in that: The end surface (2211) of the lower section (221) of the pressing member (22) is an arc surface.

8. The clamping mechanism for clamping a workpiece according to any one of claims 1 to 4, characterized in that: The clamping mechanism is a lever cylinder, the driving source is a cylinder (6), and the base end (12) of the clamping head (1) is connected to a piston rod (61), the lower end of the piston rod (61) is located inside the cylinder body, and the upper end extends out of the cylinder body and is connected to the base end (12).

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