Workpiece pressing device with controllable allowance

Abstract

The utility model discloses an allowance controllable workpiece hold-down device, including chuck body, setting up the jaw on the chuck body, and the hold-down device that surrounds the chuck body periphery, hold-down device includes hold-down rocker arm and driving mechanism that drives hold-down rocker arm swing, the jaw has the displacement that expands and contracts in the circumferential direction, and the hold-down device is equipped with the hold-down rocker arm and the driving mechanism that drives the hold-down rocker arm to swing. A clamping part is arranged at the end of the clamping jaw and used for positioning a workpiece, and the pressing rocker arm is used for pressing the workpiece. A workpiece is positioned through the clamping jaw and then is pressed through the pressing device, the pressing device is pressed through the pressing rocker arm, the pressing force of the pressing rocker arm can be controlled through the driving mechanism, the pressing force is controllable, the workpiece can be pressed through the pressing rocker arm even under the condition of insufficient space, operation is convenient, and the working efficiency is improved. And the machining requirements of specific workpieces can be met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to workpiece clamp technical field, especially relate to a workpiece pressure device of excess amount control. BACKGROUND

[0002] Mechanical parts need to be processed through cutting, grinding and other processes before being put into application, and the workpiece needs to be clamped by a clamp during processing, so the workpiece clamping tool is an essential auxiliary tool in mechanical processing.

[0003] Hydraulic clamping jaws are widely used due to their easy operation and large clamping force. However, when a specific workpiece is insufficient in the pressing space under a specific feeding mode, such as a workpiece with a stepped hole, the side and top surface of the workpiece need to be processed when feeding in the up-down direction. At this time, the workpiece needs to be clamped from the bottom, and a single hydraulic clamping jaw is often difficult to achieve effective pressing, and the pressing allowance is also difficult to accurately control, thereby affecting the processing quality. In this background, the present application proposes a pressing device with controllable allowance to overcome the shortcomings of the prior art.

[0004] The information disclosed in this BACKGROUND section is only intended to increase an understanding of the general background of the application and is not intended to be a recognition or an implication that this information forms a prior art that is already known in the art. SUMMARY

[0005] The utility model aims at providing a simple clamp convenient for workpiece detection, thereby overcoming the defects in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides a workpiece pressure device with controllable allowance, which comprises a chuck body, a clamping jaw arranged on the chuck body, and a pressing device arranged around the outer periphery of the chuck body. The pressing device comprises a pressing rocker arm and a driving mechanism for driving the pressing rocker arm to swing. The clamping jaw has a circumferential expansion and contraction displacement. The end of the clamping jaw is provided with a clamping part for positioning the workpiece, and the pressing rocker arm is used for workpiece pressing.

[0007] Further, as a preferred, the pressing device further comprises a mounting block and a bracket arranged on the mounting block. The pressing rocker arm is arranged on the bracket, and the driving mechanism is arranged on the mounting block and in contact with the pressing rocker arm.

[0008] Further, as a preferred, the driving mechanism adopts a linear oil cylinder.

[0009] Further, as a preferred, the pressing rocker arm is of L-shaped structure, and the driving mechanism is located outside the chuck body and in contact with one side of the L-shaped structure.

[0010] Further, as preferred, the end of the pressing rocker away from the driving mechanism is provided with a pressing head, and the driving mechanism drives the pressing rocker to swing so as to press the workpiece by the pressing head.

[0011] Further, as preferred, the pressing head presses the workpiece by lifting up.

[0012] Further, as preferred, the pressing head is detachably arranged on the pressing rocker.

[0013] Further, as preferred, the claw is controlled in circumferential expansion and contraction by hydraulic pressure.

[0014] Further, as preferred, the claw adopts a three-claw structure.

[0015] Further, as preferred, the pressing device is provided with a plurality of devices which are uniformly distributed on the outer periphery of the chuck body.

[0016] Compared with the prior art, one aspect of the present application has the following beneficial effects:

[0017] The workpiece is positioned by the claw, and then pressed by the pressing device, wherein the pressing device presses by the pressing rocker, and the pressing force of the pressing rocker can be controlled by the driving mechanism, so that the pressing force is controllable, and the workpiece can be pressed by the pressing rocker even in the case of insufficient space.

[0018] The driving mechanism of the present application adopts a linear oil cylinder, and the hydraulic pressure of the oil cylinder is converted into the lever force of the pressing rocker, so that the structure is simple, the controllability is strong, the cutting stability can be ensured, and the machining efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a whole structure schematic view of the workpiece pressing device with controllable excess amount of the present application;

[0020] Figure 2 It is a whole sectional view of the workpiece pressing device with controllable excess amount of the present application;

[0021] Figure 3 It is a schematic view of the workpiece to be pressed by the workpiece pressing device with controllable excess amount of the present application;

[0022] Figure 4 It is a structure schematic view of the pressing device of the present application;

[0023] Figure 5 It is a sectional view of the pressing device of the present application;

[0024] Figure 6 It is a structure schematic view of the chuck body of the present application;

[0025] Figure 7 Partial enlarged view of the clamping jaw of the utility model;

[0026] Mark: 1-chuck body, 2-clamping jaw, 21-clamping part, 3-pressing device, 31-pressing rocker arm, 32-driving mechanism, 33-mounting block, 34-bracket, 35-pressing head, 4-workpiece. DETAILED DESCRIPTION

[0027] The specific embodiments of the utility model will be described in detail below, but it should be understood that the protection scope of the utility model is not limited by the specific embodiments.

[0028] Unless otherwise explicitly stated, throughout the specification and claims, the term "comprise" or its variants such as "comprises" or "comprising" will be understood to encompass the stated elements or components, without excluding the presence of other elements or components. EMBODIMENT

[0029] As Figures 1-7 shown, a workpiece pressing device with controllable residual amount, comprising a chuck body 1, a clamping jaw 2 arranged on the chuck body 1, and a pressing device 3 arranged around the outer periphery of the chuck body 1, the pressing device 3 comprising a pressing rocker arm 31 and a driving mechanism 32 for driving the pressing rocker arm 31 to swing, the clamping jaw 2 has a circumferential expansion and contraction displacement, the clamping jaw 2 is provided with a clamping part 21 at the end for positioning the workpiece 4, and the pressing rocker arm 31 is used for workpiece pressing.

[0030] In this embodiment, as a specific scheme, the pressing device 3 further comprises a mounting block 33 and a bracket 34 arranged on the mounting block 33, the pressing rocker arm 31 is arranged on the bracket 34, and the driving mechanism 32 is arranged on the mounting block 33, and the driving mechanism 32 is in contact with the pressing rocker arm 31.

[0031] In this embodiment, as a specific scheme, the driving mechanism 32 adopts a linear oil cylinder; the linear oil cylinder drives the pressing rocker arm 31 to swing to press the workpiece; of course, the linear oil cylinder can be replaced by other structures, such as a driving motor.

[0032] In this embodiment, as a specific scheme, the pressing rocker arm 31 is of L-shaped structure, the driving mechanism 32 is located outside the chuck body 1 and in contact with one side of the L-shaped structure; more specifically, the other side of the L-shaped structure is located above the chuck body 1; through the driving force conversion of the side surface of the chuck body 1 to the pressure of the pressing rocker arm 31 above the chuck body 1, the workpiece can be better pressed in a compact space, and the pressing force is controllable.

[0033] In the embodiment, as a specific scheme, the pressing rocker arm 31 is provided with a pressing head 35 at the end away from the driving mechanism 32, and the driving mechanism 32 drives the pressing rocker arm 31 to swing so that the pressing head 35 is lifted to press the workpiece.

[0034] In the embodiment, as a specific scheme, the pressing head 35 is detachably arranged on the pressing rocker arm 31.

[0035] In the embodiment, as a specific scheme, the claw 2 is arranged to displace in the circumferential direction by hydraulic control; more specifically, the claw 2 adopts a three-claw structure, which can be expanded and contracted by hydraulic control, and the working principle of the hydraulic chuck belongs to the prior art, which will not be described in detail here.

[0036] In the embodiment, as a specific scheme, the end of two claws 2 of the three-claw structure is provided with a clamping portion 21, and the other one is not provided with a clamping portion 21, so that the pressure of the remaining two claws can be dispersed by the claw without the clamping portion 21, thereby reducing the risk of deformation of the workpiece, especially for parts with low rigidity; in addition, the workpiece can be quickly and roughly positioned by the two claws with the clamping portion 21, and finally positioned by the three claws expanded, so that the positioning efficiency can be improved.

[0037] In the embodiment, as a specific scheme, the pressing device 3 is provided with a plurality of pressing devices, which are uniformly distributed on the outer periphery of the chuck body 1.

[0038] The working principle of the utility model is as follows:

[0039] The workpiece to be processed is placed on the claw 2 above the chuck body 1 (with a stepped hole inside, and the top and outer periphery are the parts to be processed), the clamping portion 21 positions the workpiece from the inside, and then the claw 21 is expanded to clamp the workpiece; the driving mechanism 32 works to drive the pressing rocker arm 31 to swing, so that the pressing head 35 presses the workpiece from the bottom of the workpiece.

[0040] The utility model has the following advantages:

[0041] 1. The utility model positions the workpiece by the claw 2, and then presses the workpiece by the pressing device 3, wherein the pressing device 3 presses by the pressing rocker arm 31, and the pressing force of the pressing rocker arm 31 can be controlled by the driving mechanism 32, so that the pressing force is controllable, and the workpiece can be pressed by the pressing rocker arm 31 even in the case of insufficient space;

[0042] 2. The driving mechanism 32 of the utility model adopts a linear oil cylinder, which converts the hydraulic pressure of the oil cylinder into the lever force of the pressing rocker arm 31, so that the structure is simple, the controllability is strong, the cutting stability can be ensured, and the machining efficiency can be improved;

[0043] 3. The utility model discloses a chuck body side's drive force conversion to the pressure of chuck body top's pressure rocker, can realize better pressure in compact space also, and pressure force is controllable, can satisfy the processing demand of specific workpiece.

[0044] The foregoing description of the specific exemplary embodiments of the present application is presented for the purpose of illustration and description. It is not intended to be a limitation on the present application as it is expressly set forth in the following claims. It is apparent that many changes and variations can be made in the details and with the described exemplary embodiments of the present application without departing from the spirit and scope of the present application. It is therefore intended that the scope of the present application be governed by the following claims and their equivalents.

Claims

1. A workpiece clamping device with controllable allowance, characterized in that: The device includes a chuck body, jaws disposed on the chuck body, and a clamping device disposed around the outer periphery of the chuck body. The clamping device includes a clamping rocker arm and a drive mechanism for driving the clamping rocker arm to swing. The jaws have circumferential expansion and contraction displacement. The jaws have a clamping part at their ends for positioning the workpiece. The clamping rocker arm is used for clamping the workpiece.

2. The workpiece clamping device with controllable allowance according to claim 1, characterized in that: The clamping device also includes a mounting block and a bracket mounted on the mounting block. The clamping rocker arm is mounted on the bracket, and the driving mechanism is mounted on the mounting block, with the driving mechanism in contact with the clamping rocker arm.

3. The workpiece clamping device with controllable allowance according to claim 2, characterized in that: The drive mechanism is a linear hydraulic cylinder.

4. The workpiece clamping device with controllable allowance according to claim 3, characterized in that: The clamping rocker arm has an L-shaped structure, and the driving mechanism is located outside the chuck body and contacts one side of the L-shaped structure.

5. The workpiece clamping device with controllable allowance according to claim 4, characterized in that: The end of the clamping rocker arm away from the drive mechanism is provided with a pressure head, and the drive mechanism drives the clamping rocker arm to swing so that the pressure head clamps the workpiece.

6. The workpiece clamping device with controllable allowance according to claim 5, characterized in that: The pressure head presses the workpiece by lifting it upwards.

7. The workpiece clamping device with controllable allowance according to claim 5, characterized in that: The pressure head is detachably mounted on the clamping rocker arm.

8. The workpiece clamping device with controllable allowance according to claim 1, characterized in that: The gripper uses hydraulic control to expand and contract its circumferential displacement.

9. The workpiece clamping device with controllable allowance according to claim 1, characterized in that: The chuck adopts a three-claw structure.

10. A workpiece clamping device with controllable allowance according to claim 1, characterized in that: The clamping device is provided in several parts, which are evenly distributed around the outer periphery of the chuck body.

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