Butt clamp type tool

Abstract

The utility model discloses a double-clamping type tool, which belongs to the technical field of clamps and comprises a base, a left clamping mechanism and a right clamping mechanism, and the left clamping mechanism and the right clamping mechanism are symmetrically arranged on the base. Each of the left clamping mechanism and the right clamping mechanism comprises a hydraulic cylinder, a main driving wedge-shaped block and a clamping wedge-shaped block; the main driving wedge block is fixedly connected with the extending end of a piston rod of the hydraulic cylinder; the clamping wedge block is in sliding fit with the base; an object placing space is formed between the two clamping wedge blocks of the left clamping mechanism and the right clamping mechanism; when hydraulic oil is introduced into the first cavity of the hydraulic cylinder, the two clamping wedge blocks of the left clamping mechanism and the right clamping mechanism clamp an object; and when hydraulic oil is introduced into the second cavity of the hydraulic cylinder, the two clamping wedge blocks of the left clamping mechanism and the right clamping mechanism release the clamping of the object. According to the tool, force output by the hydraulic cylinder can be amplified through the wedge-shaped block, then an object is clamped, the situation that the hydraulic cylinder directly clamps the object can be avoided, and the service life of the hydraulic cylinder is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of clamps, and in particular relates to a clamping type tooling. Background Art

[0002] At present, most of the common clamping mechanisms driven by hydraulic cylinders are clamped directly by hydraulic cylinders, which cannot achieve the force-increasing effect, that is, the output force of the hydraulic cylinder is the clamping force. In addition, since the hydraulic cylinder directly clamps, the hydraulic cylinder directly bears the load, even a large offset load, which will seriously affect the service life of the hydraulic cylinder and the reliability of clamping. Utility Model Content

[0003] In view of this, the utility model provides a clamping tool, which can clamp an object after amplifying the force output by a hydraulic cylinder through a wedge block.

[0004] The utility model adopts the following technical solutions:

[0005] A clamping tool comprises a base and a left clamping mechanism and a right clamping mechanism symmetrically arranged on the base;

[0006] The left clamping mechanism and the right clamping mechanism both include a hydraulic cylinder, a main driving wedge block, and a clamping wedge block; the main driving wedge block is fixedly connected to one end of the piston rod of the hydraulic cylinder; the clamping wedge block is slidably matched with the base; and an object placement space is formed between the two clamping wedge blocks of the left clamping mechanism and the right clamping mechanism;

[0007] When hydraulic oil is introduced into the first chamber of the hydraulic cylinder, the two clamping wedge blocks of the left clamping mechanism and the right clamping mechanism can move toward each other to clamp the object, and the clamping force is greater than the force output by the hydraulic cylinder; when hydraulic oil is introduced into the second chamber of the hydraulic cylinder, the two clamping wedge blocks of the left clamping mechanism and the right clamping mechanism can move away from each other to release the clamping of the object.

[0008] Further, the main driving wedge block is provided with a first inclined surface;

[0009] The clamping wedge block is provided with a second inclined surface;

[0010] The first inclined surface and the second inclined surface are slidably matched, and the angles between the first inclined surface and the second inclined surface relative to the horizontal plane are acute angles, and both are θ;

[0011] The main driving wedge block moves in a vertical direction, and the clamping wedge block moves in a horizontal direction;

[0012] A vertical plate is arranged on the base, the main driving wedge block is located between the vertical plate and the clamping wedge block, and the vertical plate is slidably matched with the main driving wedge block.

[0013] Furthermore, a T-shaped slide groove is provided on the clamping wedge block;

[0014] The T-shaped sliding block is slidably matched with the T-shaped sliding groove.

[0015] Furthermore, it also includes a displacement sensor and a pressure sensor;

[0016] The displacement sensor is used to monitor the displacement of the piston rod in the hydraulic cylinder;

[0017] The pressure sensor is used to monitor the oil pressure in the first chamber and the second chamber.

[0018] Furthermore, it also includes a controller;

[0019] The displacement sensor and the pressure sensor are both connected to the controller signal;

[0020] The controller can calculate the magnitude of the clamping force in real time according to the included angle θ, the monitoring data of the pressure sensor and the displacement sensor.

[0021] Furthermore, it also includes a guide sleeve, and the guide sleeve can guide the piston rod;

[0022] The first chamber is a rodless chamber, and the second chamber is a rod-containing chamber;

[0023] The displacement sensor is a magnetostrictive displacement sensor.

[0024] Beneficial effects:

[0025] 1. The clamping tooling comprises a base and a left clamping mechanism and a right clamping mechanism symmetrically arranged on the base; the left clamping mechanism and the right clamping mechanism both comprise a hydraulic cylinder, a main driving wedge block, and a clamping wedge block; the main driving wedge block is fixedly connected to one end of the piston rod of the hydraulic cylinder that extends out; the clamping wedge block is slidably matched with the base; a space for placing an object is formed between the two clamping wedge blocks of the left clamping mechanism and the right clamping mechanism; when hydraulic oil is introduced into the first chamber of the hydraulic cylinder, the two clamping wedge blocks of the left clamping mechanism and the right clamping mechanism can move toward each other to clamp the object, and the clamping force is greater than the force output by the hydraulic cylinder; when hydraulic oil is introduced into the second chamber of the hydraulic cylinder, the two clamping wedge blocks of the left clamping mechanism and the right clamping mechanism can move back to back to release the clamping of the object.

[0026] In this way, the force output by the hydraulic cylinder can be amplified by the wedge block before clamping the object; moreover, the hydraulic cylinder can be prevented from directly clamping the object, thereby increasing the service life of the hydraulic cylinder.

[0027] 2. The main driving wedge block is provided with a first inclined surface; the clamping wedge block is provided with a second inclined surface; the first inclined surface and the second inclined surface are slidably matched, and the angles between the first inclined surface and the second inclined surface relative to the horizontal plane are acute angles, and both are θ; the movement direction of the main driving wedge block is the vertical direction, and the movement direction of the clamping wedge block is the horizontal direction; a vertical plate is provided on the base, the main driving wedge block is located between the vertical plate and the clamping wedge block, and the vertical plate and the main driving wedge block are slidably matched.

[0028] In this way, the vertical plate can limit the main driving wedge block, thereby preventing the reaction force of the clamping wedge block on the main driving wedge block from causing the piston rod to be subjected to bending moment, thereby improving the life and reliability of the clamping tooling.

[0029] 3. A T-shaped slider is provided on the main driving wedge block, and a T-shaped slot is provided on the clamping wedge block. The T-shaped slider and the T-shaped slot are slidably matched, which can improve the reliability of the sliding match between the main driving wedge block 7 and the clamping wedge block 8.

[0030] 4. The displacement sensor and the pressure sensor are both connected to the controller signal; the controller can calculate the clamping force in real time according to the monitoring data of the angle θ, the pressure sensor and the displacement sensor. In this way, the clamping force can be automatically controlled by the controller, thereby improving the automation level of the clamping tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of a clamping tool provided by the utility model in a non-clamping state;

[0032] Figure 2 A schematic diagram of a clamping tool provided by the utility model in a clamping state;

[0033] Figure 3 A schematic diagram of the connection relationship between the clamping wedge block and the horizontal slide rail provided by the utility model;

[0034] Figure 4 A schematic diagram of the connection relationship between the clamping wedge block and the main driving wedge block provided by the utility model;

[0035] Figure 5 A schematic structural diagram of the main drive wedge block provided by the utility model;

[0036] Figure 6 A schematic structural diagram of a clamping wedge block provided by the utility model;

[0037] Among them, 1 is the first pressure sensor, 2 is the displacement sensor, 3 is the hydraulic cylinder, 4 is the piston, 5 is the piston rod, 6 is the guide sleeve, 7 is the main driving wedge block, 701 is the T-shaped slider, 8 is the clamping wedge block, 801 is the T-shaped slide groove, 802 is the horizontal slide groove, 9 is the base, 10 is the object, 11 is the first oil port, 12 is the second oil port, 13 is the second pressure sensor, 14 is the vertical plate, and 15 is the horizontal slide rail. DETAILED DESCRIPTION

[0038] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0039] Reference Figure 1-Figure 6 , a clamping tool, comprising a base 9 and a left clamping mechanism and a right clamping mechanism symmetrically arranged on the base 9, wherein:

[0040] The left clamping mechanism and the right clamping mechanism both include a hydraulic cylinder 3, a main driving wedge block 7, and a clamping wedge block 8; the main driving wedge block 7 is fixedly connected to one end of the piston rod 5 of the hydraulic cylinder 3; the clamping wedge block 8 is slidably matched with the base 9; a placement space for an object 10 is formed between the two clamping wedge blocks 8 of the left clamping mechanism and the right clamping mechanism; Figure 1 and Figure 2 When hydraulic oil is introduced into the first chamber of the hydraulic cylinder 3 through the first oil port 11, the two clamping wedge blocks 8 of the left clamping mechanism and the right clamping mechanism can move toward each other to clamp the object 10, and the clamping force is greater than the force output by the hydraulic cylinder 3; refer to Figure 1 and Figure 2 When hydraulic oil is introduced into the second chamber of the hydraulic cylinder 3 through the second oil port 12, the two clamping wedge blocks 8 of the left clamping mechanism and the right clamping mechanism can move in the opposite direction (away from the clamped object 10) to release the clamping of the object 10.

[0041] In this way, the force output by the hydraulic cylinder 3 can be amplified by the wedge block 8 before clamping the object 10; moreover, it can avoid the hydraulic cylinder 3 directly clamping the object 10, thereby increasing the service life of the hydraulic cylinder 3.

[0042] Specifically, in this embodiment, the main driving wedge block 7 is provided with a first inclined surface; the clamping wedge block 8 is provided with a second inclined surface; the first inclined surface and the second inclined surface are slidably matched, and the angle between the first inclined surface and the second inclined surface relative to the horizontal plane is an acute angle, and both are θ; the movement direction of the main driving wedge block 7 is the vertical direction, and the movement direction of the clamping wedge block 8 is the horizontal direction; a vertical plate 14 is provided on the base 9, the main driving wedge block 7 is located between the vertical plate 14 and the clamping wedge block 8, and the vertical plate 14 is slidably matched with the main driving wedge block 7. In this way, the vertical plate 14 can play a role of limiting the main driving wedge block 7, thereby preventing the reaction force of the clamping wedge block 8 on the main driving wedge block 7 from causing the piston rod 5 to be subjected to the bending moment, thereby improving the life and reliability of the clamping tooling.

[0043] Reference Figures 4 to 6 In this embodiment, the main driving wedge block 7 is provided with a T-shaped slider 701, and the clamping wedge block 8 is correspondingly provided with a T-shaped slide groove 801. The T-shaped slider 701 on the main driving wedge block 7 is slidably matched with the T-shaped slide groove 801 on the clamping wedge block 8; and the clamping wedge block 8 is provided with a horizontal slide groove 802, and the clamping wedge block 8 is slidably matched with the horizontal slide rail 15 provided on the base 9 through the horizontal slide groove 802. The main driving wedge block 7 and the clamping wedge block 8 are slidably matched through the cooperation of the T-shaped slide groove 801 and the T-shaped slider 701, which can improve the reliability of the sliding cooperation between the main driving wedge block 7 and the clamping wedge block 8.

[0044] More specifically, in the present embodiment, the piston 4 and the inner wall of the cylinder body form a first chamber, and the first chamber is a rodless chamber; in addition, a guide sleeve 6 is also provided in the hydraulic cylinder 3, the guide sleeve 6 is fixed to the cylinder body, the piston rod 5 and the guide sleeve 6 are slidably matched, the guide sleeve 6 can guide the piston rod 5, and a second chamber is formed between the guide sleeve 6, the inner wall of the cylinder body and the outer wall of the piston rod 5, the second chamber is a rod chamber, and the cross-sectional area of ​​the second chamber is smaller than the cross-sectional area of ​​the first chamber; in addition, in the present embodiment, a displacement sensor 2 is also provided, the displacement sensor 2 is a magnetostrictive displacement sensor, specifically, the magnetic ring of the displacement sensor 2 is fixed to the piston rod 5, the waveguide of the displacement sensor 5 is penetrated by the magnetic ring, when the magnetic ring moves with the piston 4, the waveguide and the magnetic ring have relative movement, based on which the magnetostrictive displacement sensor can measure the displacement of the piston rod 5.

[0045] As an improvement, the clamping tool further includes a pressure sensor, which is used to monitor the oil pressure in the first chamber and the second chamber. Moreover, the clamping tool further includes a controller, and the displacement sensor 2 and the pressure sensor are both connected to the controller signal. The controller can calculate the clamping force in real time according to the angle θ, the pressure sensor and the monitoring data of the displacement sensor 2, thereby effectively controlling the clamping condition. In this way, the clamping force can be automatically controlled by the controller, thereby improving the automation level of the clamping tool.

[0046] Specifically, in this embodiment, the pressure sensor includes a first pressure sensor 1 and a second pressure sensor 13. The first pressure sensor 1 is used to monitor the oil pressure of the first chamber, and the second pressure sensor 13 is used to monitor the oil pressure of the second chamber. In addition, in this embodiment, θ is 70°, the cross-sectional area of ​​the first chamber is A1, the cross-sectional area of ​​the second chamber is A2, the oil pressure of the first chamber is P1, the oil pressure of the second chamber is P2, and the main drive wedge block 7 is vertically downward. The displacement is S1, the horizontal displacement of the clamping wedge block 8 to the right is S2, the force output by the piston rod 5 is F1, the clamping force is F2, the work done by the piston rod 5 to the outside is W1, and the work done by the main driving wedge block 7 to the clamping wedge block 8 is W2, then, F1 = A1*P1-A2*P2 ("*" represents the multiplication sign), W1 = F1*S1, S2 = S1 / tanθ, ignoring energy loss, according to the law of conservation of energy, W2 = W1 = F1*S1 = F2*S2. Because S1 is greater than S2, F2 is greater than F1, that is, the clamping tooling can amplify the force output by the hydraulic cylinder 3 through the wedge block and then clamp the object 10.

[0047] When using the clamping tool, when clamping is required, hydraulic oil is input into the first oil port 11 of the left and right clamping mechanisms respectively. Under the action of the oil, the driving piston 4 drives the piston rod 5 and the main driving wedge block 7 to move downward. Under the drive of the main driving wedge block 7, the clamping wedge block 8 moves toward the clamped object 10 along the horizontal direction until it contacts the clamped object 10, thereby clamping the clamped object 10; when the object 10 needs to be released from clamping, hydraulic oil only needs to be input into the second oil port 12 of the oil cylinder in the left and right clamping mechanisms respectively. Under the action of the oil pressure, the driving piston 4 drives the piston rod 5 and the main driving wedge block 7 to move upward. Under the drive of the main driving wedge block 7, the clamping wedge block 8 moves horizontally in the direction away from the clamped object 10, thereby releasing the clamping of the object 10.

[0048] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A clamping tool, characterized in that: It comprises a base and a left clamping mechanism and a right clamping mechanism symmetrically arranged on the base; The left clamping mechanism and the right clamping mechanism both include a hydraulic cylinder, a main driving wedge block, and a clamping wedge block; the main driving wedge block is fixedly connected to one end of the piston rod of the hydraulic cylinder; the clamping wedge block is slidably matched with the base; and an object placement space is formed between the two clamping wedge blocks of the left clamping mechanism and the right clamping mechanism; When hydraulic oil is introduced into the first chamber of the hydraulic cylinder, the two clamping wedge blocks of the left clamping mechanism and the right clamping mechanism can move toward each other to clamp the object, and the clamping force is greater than the force output by the hydraulic cylinder; when hydraulic oil is introduced into the second chamber of the hydraulic cylinder, the two clamping wedge blocks of the left clamping mechanism and the right clamping mechanism can move away from each other to release the clamping of the object.

2. A clamping tool according to claim 1, characterized in that: The main driving wedge block is provided with a first inclined surface; The clamping wedge block is provided with a second inclined surface; The first inclined surface and the second inclined surface are slidably matched, and the angles between the first inclined surface and the second inclined surface relative to the horizontal plane are acute angles, and both are θ; The main driving wedge block moves in a vertical direction, and the clamping wedge block moves in a horizontal direction; A vertical plate is arranged on the base, the main driving wedge block is located between the vertical plate and the clamping wedge block, and the vertical plate and the main driving wedge block are slidably matched.

3. A clamping tool according to claim 2, characterized in that: The main driving wedge block is provided with a T-shaped sliding block, and the clamping wedge block is provided with a T-shaped sliding groove; The T-shaped sliding block is slidably matched with the T-shaped sliding groove.

4. A clamping tool according to claim 3, characterized in that: Also includes displacement sensors and pressure sensors; The displacement sensor is used to monitor the displacement of the piston rod in the hydraulic cylinder; The pressure sensor is used to monitor the oil pressure in the first chamber and the second chamber.

5. The clamping tool according to claim 4, characterized in that: Also includes a controller; The displacement sensor and the pressure sensor are both connected to the controller signal; The controller can calculate the magnitude of the clamping force in real time according to the angle θ, the monitoring data of the pressure sensor and the displacement sensor.

6. A clamping tool according to any one of claims 4 or 5, characterized in that: It also includes a guide sleeve, which can guide the piston rod; The first chamber is a rodless chamber, and the second chamber is a rod-containing chamber; The displacement sensor is a magnetostrictive displacement sensor.

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