JPH04102705U - Shaft rotation and linear movement mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] To create a rotational and linear movement mechanism that can rotate and move linearly by operating the shaft alone while the supporting member and drive source remain stationary at a fixed position. [Structure] A shaft bearing 7 that slidably supports the shaft 5, and a rotating housing 9 that holds the shaft bearing 7 integrally.
and a fixed housing 11 that rotatably supports the rotary housing 9, and the shaft 5 and the shaft support 7 are provided.
and are engaged in the rotational direction around the axis, and a rotation transmission section 13 is provided in the rotation housing 9.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention attaches tools and work implements to the shaft and allows it to perform rotational movement and linear movement. This invention relates to shaft rotation and translation mechanisms that can be used in equipment and equipment.

0002

[Prior art and its issues]

For drilling units and handling units such as screw tightening robots, etc. Attach a tool or implement to one end of the shaft so that the shaft is in direct contact with rotational motion. By imparting progressive motion, it is possible to perform necessary processing, manipulation, etc. There are many things.

0003 However, there are known methods that allow a shaft equipped with a tool to perform rotational motion and linear motion. In the mechanism, it is necessary to move the support member and drive source along with the linear movement of the shaft. As a result, the unit as a whole becomes a large piece of equipment with a large operating space and a large operating load. There are some defects observed.

0004 In order to solve this problem, this invention keeps the support member and drive source stationary at a fixed position. A rotating and linear mechanism that allows the necessary rotation and linear motion to be performed using the Tamasha shaft alone. This is what we propose.

[0005]

[Means to solve the problem]

The shaft rotation and straight movement mechanism according to the present invention supports the shaft in a slidable manner. A shaft bearing body, a rotating housing that holds this shaft bearing body together, and this rotating housing. A fixed housing rotatably supports the shaft, and the shaft and the bearing body are connected to each other. In addition to engaging in the rotation direction around the axis, a rotation transmission part is provided in the rotation housing. It consists of the following.

[0006]

[Effect] This rotary linear mechanism allows the tool to move straight to the opposite side of the shaft end where the tool or work implement is attached. By connecting the actuator, the system can be slidably supported on the shaft bearing body. It can give straight motion to the shaft. In addition, rotation transmission from the rotary actuator By transmitting rotational force to the rotary housing and rotating the rotary housing, the bearing body can slide automatically. Rotational motion can be applied to the shaft currently supported.

[0007]

【Example】

Hereinafter, embodiments will be described with reference to the drawings.

[0008] Figure 1 shows a rotating linear unit incorporating the shaft rotating linear mechanism according to the present invention. A configuration example is shown. In the figure, 1 is a support frame, and 2 is fixed to the support frame 1. A fixed bracket is shown, and a shaft rotation and translation mechanism 3 is mounted on this bracket 2. It is installed together with the drive source.

[0009] The rotational translation mechanism 3, which is prepared in advance as an assembled product, includes a bracket 2 and the bracket. 2. Insert it into the setting part of the bracket corner defined by the mounting plate 4 installed upright. installed. The rotational translation mechanism 3 supports the shaft 5 in a slidable manner. A shaft bearing 7 and a rotating housing 9 that connects the shaft bearing 7 with a key 8 and holds it together. and a fixed halves that rotatably support this rotary housing 9 via bearings 10. housing 11 is provided as the main element, and the fixed housing 11 on the outer periphery is provided as a bracket. 2 and the mounting plate 4.

0010 The shaft 5 and the shaft support 7 are engaged with each other in the rotational direction around the shaft. It is possible to make the toe 5 perform a rotational movement while performing a linear movement. In the case of the embodiment, the means for engaging the shaft 5 and the bearing body 7 in the rotational direction is The shaft 5 is formed of a spline shaft having a plurality of ball grooves 5a on the outer periphery. At the same time, as shown in FIGS. 2 and 3, the bearing body 7 has a ball groove 7a provided on its inner circumference. and the ball groove 5a provided on the outer periphery of the shaft 5. It is formed of a ball spline which supports the spline shaft 5 via the ball spline. sand In other words, the shaft bearing 7 formed of a ball spline prevents the shaft 5 from moving straight in the axial direction. For motion, each ball 6 rolls and is responsible for the smooth sliding movement of the shaft 5. At the same time, when the outer rotating housing 9 rotates, the shaft is The shaft 5 is rotated in synchronization with the rotary housing 9 by transmitting rotational force around the shaft to the shaft 5. It plays a role in turning things around.

[0011] The rotary housing 9 also has a shaft extending through the shaft bearing 7 at its lower end. A pulley 13 is provided around the foot 5 as a rotation transmission part. This pulley 13 is A collar (bearing holder) 12 is attached to the end face of the rotating housing 9 to connect the bearing body 7 and the like. It is fixed in the heart14.

0012 Next, the overall structure of the unit will be explained. A mounting attachment 16 is attached to the lower end 5A of the shaft 5 which is supported by the shaft 7. It is worn. This mounting attachment 16 is equipped with a Then, tools and implements (not shown) are attached. 17 indicates a hole for installing tools, etc. vinegar.

[0013] On the other hand, the upper end 5B of the shaft 5 is connected to a linear actuator fixed to the ceiling of the bracket 2. A rod 19 that hangs vertically from a chatter (cylinder) 18 and a rotary They are connected via a joint 20 and a floating joint 21. B The tally joint 20 connects and holds the shaft 5 via a bearing 22, and Propagation of rotation from the shaft 5 to the linear actuator 18 is blocked. Also, The steering joint 21 prevents misalignment between the shaft 5 and the linear actuator 18. It plays the role of cleaning. Note that from one side of the rotary joint 20, A detent rod 24 is protruded and inserted into a long hole 23 provided in the bracket 2. There is.

[0014] Further, the pulley 13 provided as a rotation transmission part in the rotation housing 9 includes: A rotary actuator fixed on the bracket 2 at a side position of the rotary linear movement mechanism 3 The rotational force necessary to rotate the shaft 5 is transmitted from the (motor) 25. That is, A pulley 27 provided on the rotation shaft 26 of the rotation actuator 25 and the rotation housing 9 A timing belt 28 is mounted on the pulley 13 provided in the rotating housing 9. The shaft 5 can be rotated via the bearing body 7.

[0015] In the rotary linear unit having the above configuration, the rod 1 of the linear actuator 18 By extending and contracting the shaft 9 up and down, a linear movement can be given to the shaft 5. Rotates from the rotary actuator 25 to the rotary housing 9 via pulleys 27, 13, etc. By transmitting force, rotational motion can be given to the shaft 5, and the For tools and work implements that can be attached to the lower end 5A via the attachment attachment 16, Simultaneously perform a linear motion indicated by an arrow S in the illustration and a rotational motion indicated by an arrow R in the illustration. can be set. That is, the shaft rotational translation mechanism 3 according to the present invention is incorporated. If it is a rotary linear unit composed of The actuator 18 and the rotary actuator 25 remain stationary at the fixed position, and tools etc. are not removed. The attached shaft 5 can be operated independently to perform necessary processing, operation, etc. The entire unit can be assembled into a compact unit with a small operating load. You can

[0016] The shaft rotation and translation mechanism according to the present invention is not limited to the mode of the above-mentioned typical embodiment. However, various other embodiments can be adopted. For example, the shaft and the rotation around the axis. A ball bearing is used as a shaft bearing that engages in the direction of rotation and supports the shaft in a slidable manner. This is not limited to the case where Pline is used. In addition, the rotation transmission part provided in the rotation housing The type and mounting position can also be changed freely. Furthermore, the direct The connection structure of the actuator and the rotation actuator for the rotation transmission part of the rotation housing. The power transmission mechanism of the motor may also be modified as appropriate.

[0017]

[Effect of the idea]

As described above, if the shaft rotation and linear movement mechanism according to the present invention is used, the support member and drive The source remains stationary at a fixed position, and the shaft alone makes rotational and linear movements. can be done. Therefore, if this mechanism is used, the drill unit and handling Rotating linear units such as units have a small operating load weight as a whole unit. It can be constructed into a simple structure that does not take up any operating space.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a rotational translation unit showing one embodiment.

FIG. 2 is a detailed sectional view of the main part of FIG. 1;

FIG. 3 is a sectional view taken along the line AA in FIG. 2;

[Explanation of symbols] 1 Support frame 2 Bracket 3 Rotation linear mechanism 4 Mounting plate 5 Shaft 6 balls 7 Bearing body 8 key 9 Rotating housing 10 Bearing 11 Fixed housing 12 colors 13 Rotation transmission part

Claims (1)

[Scope of utility model registration request] [Claim 1] A bearing body that slidably supports a shaft, a rotating housing that integrally holds this bearing body,
A shaft characterized in that a fixed housing rotatably supports the rotary housing, the shaft and the bearing body are engaged in a rotational direction around the axis, and a rotation transmission part is provided in the rotary housing. Rotation and translation mechanism.