CN205600356U - Left-right rotating screw rod translation type clamp holder - Google Patents

Abstract

The utility model discloses a control and revolve lead screw translation type holder, include: an electric motor; the screw rod is driven by the motor, one end of the screw rod is provided with left-handed threads and a left-handed nut, and the other end of the screw rod is provided with right-handed threads and a right-handed nut; the left claw rod is fixedly connected with the left-handed nut through a nut seat, and the right claw rod is fixedly connected with the right-handed nut through a nut seat. Two threads with opposite rotation directions are arranged at two ends of the screw rod of the utility model, when the motor drives the screw rod to rotate, the left-handed nut and the right-handed nut at the two ends of the screw rod are close to or far away from each other, thereby driving the left claw rod and the right claw rod to clamp or loosen; the utility model discloses dispose solitary servo motor or step motor, when machining, can conveniently press from both sides tightly or loosen the work piece of different dimensions through the rotation of programming control motor.

Description

Left and right screw screw translation gripper

technical field

The utility model relates to a left and right screw screw translation clamper, which belongs to the technical field of clamps.

Background technique

In the cutting process, in order to make the size, shape and position accuracy of each machined surface of the workpiece meet the specified requirements, the workpiece must occupy a definite position in the machine tool or fixture. Positioning is the process of determining that the workpiece occupies the correct position on the machine tool or in the fixture. Whether the workpiece positioning is accurate determines whether the machining accuracy of the workpiece can meet the requirements. Workpiece clamping ensures that the workpiece is accurately positioned to reduce vibration or looseness for processing.

At present, some fixtures can hold workpieces with limited diameters and poor positioning accuracy. During the use of the fixture, the rack and gear will wear and tear, resulting in a large gap. At this time, the active pliers are directly pushed by the oil cylinder, while the driven pliers are moved by the indirect action of the rack and gear. Once there is a gap , the active tongs and driven tongs will be out of sync. Therefore, the center position will shift and the clamping accuracy will be lost.

Contents of the invention

The technical problem to be solved by the utility model is: to overcome the deficiencies of the prior art, to provide a left and right screw screw translation clamper to solve the technical problem that the jaws of the clamp are not synchronized.

In order to solve the above-mentioned technical problems, the technical solution of the present utility model is, a left-right screw screw translation clamper, comprising:

motor;

A screw driven by an electric motor, one end of the screw has a left-handed thread and a left-handed nut is installed, and the other end has a right-handed thread and a right-handed nut is installed;

The claw rod includes a left claw rod and a right claw rod. The left claw rod is fixedly connected with the left-handed nut through a nut seat, and the right claw rod is fixedly connected with the right-handed nut through the nut seat.

A specific structure of the screw rod is further provided, the screw rod includes a pair of two screw rods with opposite rotation directions, the two screw rods are connected as a whole through a connecting shaft, and are simultaneously driven by a motor.

Another structure of the screw rod is further provided, and the screw rod is a bidirectional screw rod with a pair of opposite-hand threads.

Further, in order to guide the clamping action of the claw rod, the left and right screw screw translation clamper also includes a guide rail, between the left claw rod and the left-handed nut, between the right claw rod and the right-handed nut A guide rod is connected, and a through hole matched with the guide rail is opened on the guide rod, and the guide rod is sleeved on the guide rail through the through hole.

Further, in order to improve repeat positioning accuracy, the screw rod is a ball screw, and the guide rail is a rolling guide rail.

Further, in order to conveniently control the rotation of the motor through programming, the left and right screw screw translation clamps also include a servo motor or a stepping motor for controlling the motor, and the motor is connected between the servo motor or the stepping motor. Spin under control.

After adopting the above technical scheme, the two ends of the screw rod of the utility model are provided with two threads with opposite rotation directions. When the motor drives the screw rod to rotate, the left-handed nut and the right-handed nut at the two ends of the screw rod are close to or far away from each other, thereby driving The left claw rod and the right claw rod are clamped or loosened; the utility model can make the left claw rod and the right claw rod move synchronously, avoiding the problem of low clamping precision caused by asynchronous actions; the utility model The new type is equipped with a separate servo motor or stepping motor. During machining, it is convenient to clamp or loosen workpieces of different sizes by controlling the rotation of the motor through programming; in addition, when the screw is a ball screw, the When the guide rail is a rolling guide rail, the repeated positioning accuracy of the left claw rod and the right claw rod can be greatly improved, and it can be used in high-precision processing.

Description of drawings

Fig. 1 is a structural principle diagram of the utility model;

Among the figure, 1, electric motor, 2, screw mandrel, 3, guide rail, 4-1, left claw bar, 4-2, right claw bar, 5, guide rod.

detailed description

In order to make the content of the utility model more clearly understood, the utility model will be further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

As shown in Figure 1, a left and right screw screw translation clamper, including:

motor 1;

A screw 2 driven by the motor 1, one end of the screw 2 has a left-handed thread and a left-handed nut is installed, and the other end has a right-handed thread and a right-handed nut is installed;

Claw rod, including left claw rod 4-1 and right claw rod 4-2, left claw rod 4-1 is fixedly connected with a left-handed nut through a nut seat, and right claw rod 4-2 is connected with a right-handed nut through a nut seat Nut secure connection provides accurate translational clamping action.

Preferably, as shown in FIG. 1 , the screw rod 2 includes a pair of two screw rods that rotate in opposite directions. The two screw rods are connected as a whole through a connecting shaft and driven by the motor 1 at the same time.

Optionally, as shown in Figure 1, the left and right screw screw translation clamper also includes a guide rail 3, between the left claw rod 4-1 and the left-handed nut, and between the right claw rod 4-2 and the right-handed nut. There is a guide rod 5, and a through hole matching with the guide rail 3 is opened on the guide rod 5, and the guide rod 5 is sleeved on the guide rail 3 through the through hole;

When the left claw rod 4-1 and the right claw rod 4-2 moved left and right under the drive of the screw mandrel 2, the guide rod 5 moved along the direction of the guide rail 3 to ensure that the left claw rod 4 connected to the guide rod 5 -1 and the translational movement of the right jaw rod 4-2, and the translation type jaws can automatically center the workpiece.

Preferably, in order to improve repeat positioning accuracy, the screw rod 2 is a ball screw, and the guide rail 3 is a rolling guide rail.

Further, the left and right screw screw translation clamper also includes a servo motor or a stepping motor for controlling the motor 1, and the motor 1 rotates under the control of the servo motor or the stepping motor.

Embodiment two:

As shown in Figure 1, a left and right screw screw translation clamper, including:

motor 1;

A screw 2 driven by the motor 1, one end of the screw 2 has a left-handed thread and a left-handed nut is installed, and the other end has a right-handed thread and a right-handed nut is installed;

Claw rod, including left claw rod 4-1 and right claw rod 4-2, left claw rod 4-1 is fixedly connected with a left-handed nut through a nut seat, and right claw rod 4-2 is connected with a right-handed nut through a nut seat The nut secures the connection.

Preferably, the screw rod 2 is a bi-directional screw rod with a pair of opposite-hand threads.

Further, the left and right screw screw translation clamper also includes a servo motor or a stepping motor for controlling the motor 1, and the motor 1 rotates under the control of the servo motor or the stepping motor.

The calculation formula between the clamping force F _N and the driving torque T provided to the screw in this clamp is:

${\mathrm{<span\; class="notranslate">\; f</span>}}_{\mathrm{<span\; class="notranslate">\; N</span>}}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; T</span>}}{{\mathrm{<span\; class="notranslate">\; d</span>}}_{\mathrm{<span\; class="notranslate">\; o</span>}}\mathrm{<span\; class="notranslate">\; t</span>}\mathrm{<span\; class="notranslate">\; a</span>}\mathrm{<span\; class="notranslate">\; no</span>}\mathrm{<span\; class="notranslate">\; \&beta;</span>}}$

In the formula, d _O is the pitch diameter (mm) of the lead screw thread, and β is the helix angle of the thread.

Two ends of the screw rod 2 of the utility model are provided with two threads with opposite rotation directions. When the motor 1 drives the screw rod 2 to rotate, the left-handed nut and the right-handed nut at the two ends of the screw rod 2 approach or move away from each other, thereby driving the left claw The rod 4-1 and the right claw rod 4-2 are clamped or loosened; the utility model can make the left claw rod 4-1 and the right claw rod 4-2 act synchronously, avoiding the failure caused by asynchronous actions. The problem of low clamping accuracy; the utility model is equipped with a separate servo motor or stepping motor, which can conveniently clamp or loosen workpieces of different sizes and specifications through programming to control the rotation of the motor 1 during machining; in addition, When the screw rod 2 is a ball screw and the guide rail 3 is a rolling guide rail, the repeated positioning accuracy of the left claw rod 4-1 and the right claw rod 4-2 can be greatly improved, and can be suitable for use in high-precision processing.

The specific embodiments described above have further described the technical problems, technical solutions and beneficial effects solved by the utility model in detail. It should be understood that the above descriptions are only specific embodiments of the utility model and are not intended to be used To limit the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims (6)

1. A left and right screw translation clamper, characterized in that it comprises: electric motor (1); A screw (2) driven by the motor (1), one end of the screw (2) has a left-handed thread and a left-handed nut is installed, and the other end has a right-handed thread and a right-handed nut is installed; Claw rod, including left claw rod (4-1) and right claw rod (4-2), left claw rod (4-1) is fixedly connected with left-handed nut through nut seat, right claw rod (4- 2) It is fixedly connected with the right-handed nut through the nut seat. 2. The right-and-left screw screw translation clamper according to claim 1, characterized in that: the screw rod (2) includes a pair of two screw rods with opposite rotation directions, and the two screw rods pass through a connecting shaft They are connected as one and driven simultaneously by the motor (1). 3. The right-and-left screw screw clamp according to claim 1, characterized in that: the screw (2) is a two-way screw with a pair of threads with opposite rotation directions. 4. According to claim 1, 2 or 3, the left and right screw screw translation clamper is characterized in that: the left and right screw screw translation clamper also includes guide rails (3), and the left clamp Between the claw rod (4-1) and the left-handed nut, the right claw rod (4-2) and the right-handed nut are connected with a guide rod (5), and the guide rod (5) is provided with a guide rail (3) With the matched through hole, the guide rod (5) is sleeved on the guide rail (3) through the through hole. 5 . The left and right screw screw clamp according to claim 4 , characterized in that: the screw ( 2 ) is a ball screw, and the guide rail ( 3 ) is a rolling guide rail. 6. The right-and-left screw screw translation clamper according to claim 5, characterized in that: the left-right screw screw translation clamper also includes a servo motor or a servo motor for controlling the motor (1) A stepping motor, the motor (1) rotates under the control of a servo motor or a stepping motor.