CN-121973003-A - Clearance eliminating transmission device for tool changing mechanism and double-tool changing-position chain type tool magazine

CN121973003ACN 121973003 ACN121973003 ACN 121973003ACN-121973003-A

Abstract

The invention relates to the technical field of tool changing mechanism transmission, in particular to a clearance eliminating transmission device for a tool changing mechanism and a double-tool changing-position chain type tool magazine, which comprises a first linear assembly, a second linear assembly and a third linear assembly, wherein the first linear assembly is arranged between a beam of a rack and the tool changing mechanism and comprises a main rack, a gear and an auxiliary rack, the main rack is fixed on the side wall of the beam, and meshing teeth are arranged on the lower surface of the main rack; the gear is rotatably arranged on the tool changing mechanism and meshed with the main rack, the auxiliary rack is arranged below the gear, the meshing parts at the two ends of the auxiliary rack in the length direction are respectively and correspondingly arranged at the two sides of the gear, the auxiliary rack is arranged on the cross beam through the driving component, when the tool changing mechanism moves to the position of a tool changing point, the gear stops rotating, the driving component continues to drive the meshing part at one end of the auxiliary rack to push the gear to linearly move, the gear can be driven in a compensating mode in a reversing clearance area, the backlash is filled, transmission delay and reversing impact are eliminated, and reversing transmission without idle stroke, impact and transmission hysteresis is realized.

Inventors

CHEN LIANG
ZHU JIANGUO
Xia Kangjun
GU NING

Assignees

冈田智能(江苏)股份有限公司

Dates

Publication Date: 20260505
Application Date: 20260403

Claims (10)

1. The utility model provides a clearance transmission that disappears for tool changing mechanism, its characterized in that, including setting up between crossbeam and the tool changing mechanism of frame, be used for the drive tool changing mechanism moves to the first linear assembly of tool changing point along the length direction of crossbeam, first linear assembly includes: the main rack is fixedly arranged on the side wall of the cross beam, and meshing teeth are arranged on the lower surface of the main rack; The gear is rotatably arranged on the tool changing mechanism and meshed with the main toothed bar; The auxiliary racks are arranged below the gear, the meshing parts of the auxiliary racks at the two ends of the length direction of the auxiliary racks are respectively and correspondingly arranged at the two sides of the gear, and the auxiliary racks are arranged on the cross beam through a driving assembly; when the gear is meshed with the main rack for transmission, the auxiliary rack is driven by the driving assembly to synchronously move with the gear, and the meshing parts at the two ends are kept separate from and not contacted with the gear; when the tool changing mechanism moves to the position of the tool changing point, the gear stops rotating, and the driving assembly continuously drives the meshing part at one end of the auxiliary rack to push the gear to linearly move so as to fill the backlash between the gear and the main rack.
2. The clearance elimination transmission device for a tool changing mechanism according to claim 1, wherein the tool changing mechanism and the first linear assembly are slidably disposed on a cross beam through a traverse plate; The first linear component is arranged on the inner side wall of the transverse moving plate surface, which is opposite to the cross beam; the first linear assembly further comprises a first driving motor, and the first driving motor and the tool changing mechanism are respectively arranged at two ends of the outer side wall of the transverse moving plate along the moving direction of the gear.
3. The clearance eliminating transmission device for the tool changing mechanism according to claim 2, wherein a hollow vertical beam is arranged between the tool changing mechanism and the traverse plate; the hollow vertical beam is internally provided with a second linear component for driving the tool changing mechanism to move up and down along the vertical direction; the second linear assembly comprises an air cylinder and a driving block arranged on the tool changing mechanism, wherein the driving end of the air cylinder is connected with the driving block, and the air cylinder is arranged in a hollow cavity of the hollow vertical beam.
4. A clearance elimination transmission for a tool changing mechanism according to claim 3, wherein guide rail assemblies are provided between the traverse plate and the cross member, and between the tool changing mechanism and the vertical beam.
5. The clearance eliminating transmission device for a tool changing mechanism according to claim 2, wherein the first driving motor is mounted on the traverse plate through a slide plate; The transverse moving plate is provided with a groove, the sliding plate is embedded into the groove, the top surface and the bottom surface of the sliding plate are respectively provided with an adjusting bolt, and the two adjusting bolts are used for adjusting the upper position and the lower position of the sliding plate in the groove, so that the meshing position of the gear between the main rack and the auxiliary rack is adjusted.
6. The clearance elimination transmission device for a tool changing mechanism according to claim 1, wherein a mounting plate is arranged on the front side wall of the cross beam, and the main rack is fixedly arranged on one side wall of the mounting plate far away from the cross beam; the driving assembly is arranged on the rear side wall of the cross beam and comprises a second driving motor, a screw rod and a nut; The auxiliary rack is provided with an engagement portion and a mounting portion, the engagement portion is located on the front side of the mounting plate, and the mounting portion penetrates through the mounting plate and the cross beam to be connected with the nut of the driving assembly.
7. The clearance eliminating transmission device for a tool changing mechanism according to claim 6, wherein the mounting plate is provided with a bearing platform at a position below the mounting portion corresponding to the auxiliary rack, and a roller pin row is provided on a contact surface of the auxiliary rack and the bearing platform.
8. The backlash eliminating transmission for a tool changing mechanism according to claim 1, wherein a neutral region is provided between the meshing portions at both ends of the auxiliary rack, and both end portions of the meshing portions at both ends, which are adjacent to the neutral region, are inclined tooth surfaces.
9. The clearance elimination transmission for a tool changing mechanism according to claim 1, further comprising a lubrication assembly including a lubrication gear, a gear shaft, and an oil supply assembly; One end of the gear shaft is fixedly arranged, the lubrication gear is rotatably arranged at the other end of the gear shaft, and the lubrication gear is meshed with the main rack; The center of the gear shaft is axially provided with an oil supply hole, the gear shaft and the installation shaft section of the lubricating gear are provided with annular grooves, the annular grooves are radially provided with a plurality of oil distributing holes communicated with the oil supply hole, and the lubricating gear is radially provided with a plurality of through holes communicated with the annular grooves.
10. A double-tool-changing-position chain type tool magazine, characterized by comprising two independently arranged tool changing mechanisms, wherein the two tool changing mechanisms adopt clearance eliminating transmission devices for the tool changing mechanisms according to any one of claims 1 to 9.

Description

Clearance eliminating transmission device for tool changing mechanism and double-tool changing-position chain type tool magazine Technical Field The invention relates to the technical field of tool changing mechanism transmission, in particular to a clearance eliminating transmission device for a tool changing mechanism and a double-tool changing-position chain type tool magazine. Background In the tool changing process of the chain type tool magazine, the tool changing flow has definite time sequence requirements that firstly, a tool changing mechanism is required to be moved to a tool changing point position corresponding to the tool magazine, then the actions of tool buckling and tool drawing are completed through rotation or movement of a tool changing arm, finally, the tool changing mechanism is moved to a tool changing position of a main shaft, and then the tool changing operation of the main shaft is realized through rotation or movement of the tool changing arm. The reliability and accuracy of the tool changing action are directly determined by the position accuracy of the tool changing point, so that in the prior art, the movement of the tool changing mechanism usually adopts a gear-rack precise meshing transmission mode, and the transmission mode can ensure the transmission stability and positioning accuracy of the movement of the tool changing mechanism to a certain extent by virtue of the characteristics of simple structure and high transmission efficiency, thereby meeting the basic tool changing requirement of a chain type tool magazine. However, when the gear needs to rotate reversely to drive the tool changing mechanism to move reversely, due to the fact that a gear side gap inevitably exists between the gear and the rack, in a period of time when the other side tooth surface of the gear is not adhered to the other side tooth surface of the rack, the gear only idles and cannot drive the tool changing mechanism to move reversely, and further obvious motion delay occurs to the tool changing mechanism, so that the tool changing efficiency and the tool changing precision are affected. Disclosure of Invention The invention provides a clearance eliminating transmission device for a tool changing mechanism and a double-tool changing-position chain type tool magazine, which can effectively solve the problems in the background technology. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The utility model provides a clearance transmission that disappears for tool changing mechanism, includes the setting between crossbeam and tool changing mechanism of frame, is used for the drive tool changing mechanism removes to the first linear assembly of tool changing point along the length direction of crossbeam, first linear assembly includes: the main rack is fixedly arranged on the side wall of the cross beam, and meshing teeth are arranged on the lower surface of the main rack; The gear is rotatably arranged on the tool changing mechanism and meshed with the main toothed bar; The auxiliary racks are arranged below the gear, the meshing parts of the auxiliary racks at the two ends of the length direction of the auxiliary racks are respectively and correspondingly arranged at the two sides of the gear, and the auxiliary racks are arranged on the cross beam through a driving assembly; when the gear is meshed with the main rack for transmission, the auxiliary rack is driven by the driving assembly to synchronously move with the gear, and the meshing parts at the two ends are kept separate from and not contacted with the gear; when the tool changing mechanism moves to the position of the tool changing point, the gear stops rotating, and the driving assembly continuously drives the meshing part at one end of the auxiliary rack to push the gear to linearly move so as to fill the backlash between the gear and the main rack. Further, the tool changing mechanism and the first linear component are arranged on the cross beam in a sliding way through a transverse moving plate; The first linear component is arranged on the inner side wall of the transverse moving plate surface, which is opposite to the cross beam; the first linear assembly further comprises a first driving motor, and the first driving motor and the tool changing mechanism are respectively arranged at two ends of the outer side wall of the transverse moving plate along the moving direction of the gear. Further, a hollow vertical beam is arranged between the tool changing mechanism and the transverse moving plate; the hollow vertical beam is internally provided with a second linear component for driving the tool changing mechanism to move up and down along the vertical direction; the second linear assembly comprises an air cylinder and a driving block arranged on the tool changing mechanism, wherein the driving end of the air cylinder is connected with the driving block, and the air cylinder is arranged in a