A multi-link lifting spindle mechanism with self-locking at top dead center and bottom dead center positions

Abstract

The present invention relates to a multi-link type lifting spindle mechanism, which belongs to the field of work jigs. The present invention includes a frame, a bottom plate, a guiding slider, a lifting rod, a spindle, a pressing rod, a pin shaft mounting support, a locking push rod, a small slider, a spring bracket, a spring plunger, an upper dead point position limiting block and a lower dead point position limiting block. The bottom plate is on the frame, the lifting rod is inside the guiding slider, one end of the lifting rod is connected to the spindle, the other end of the lifting rod is connected to the pressing rod, the pressing rod is connected to the pin shaft mounting support, the pin shaft mounting support is installed on the bottom plate, one end of the locking push rod is connected to the pressing rod, the other end of the locking push rod is connected to the small slider, the small slider is on the bottom plate, the spring bracket is on the bottom plate, the spring plunger is installed on the spring bracket, the spring plunger contacts the small slider, and the upper dead point position limiting block and the lower dead point position limiting block are both installed on the bottom plate. The structure of the present invention is simple and reasonable, the cost is low, the operation and maintenance are convenient, the labor intensity is low, the automation degree is high, and the use requirements are met.

Description

Technical Field

[0001] The present invention relates to a tooling mechanism, and in particular to a multi-link type lifting clamping shaft mechanism with self-locking at the top and bottom dead center positions, which belongs to the technical field of tooling fixtures. Background Art

[0002] Tooling fixtures are an indispensable production auxiliary device in the industrial production and manufacturing process, and play a very important role in the entire manufacturing system. In any process of the product production process, tooling fixtures are required to quickly, conveniently and safely install and fix workpieces. Reasonable and efficient tooling fixtures can not only greatly ensure the machining accuracy of workpieces, stabilize product quality, improve production efficiency, reduce production costs, but also improve the working conditions of workers, ensure safe production, and even expand the process range of machine tools to achieve "one machine with multiple functions".

[0003] There are many types of existing tooling fixtures, such as welding fixtures, inspection fixtures, assembly fixtures, machine tool fixtures, etc. However, due to the ever-changing actual production processes of various different products and their different conditions and requirements, there are still some inventions and creations of special tooling fixtures at present. For example, in the production and manufacturing process of hydraulic cylinders, there is an important process that requires the cylinder barrel and the cylinder head to be tightened and assembled into an integral cylinder through a threaded connection method. When the worker tightens and assembles, one hand needs to hold a crowbar and insert it into the C-shaped oil nozzle outside the cylinder barrel to prevent the cylinder barrel from rotating, and the other hand needs to hold a wrench and screw it into the cylinder head until it is tightened. The method of manually clamping the cylinder barrel with a crowbar in this cylinder assembly process is time-consuming and laborious, the labor intensity of workers is very high, the production efficiency is greatly reduced, and it is difficult to ensure the consistency of product assembly quality.

[0004] In a Chinese patent with a publication date of March 21, 2012 and a publication number of 102383966A, an invention patent named "Connection Structure and Connection Method between Cylinder Barrel and Cylinder Head" is disclosed. In this patent, the cylinder barrel and the cylinder head are in interference fit through serrated threads. Although through this patent, the pressure of high-temperature and high-pressure gas in the cylinder is not easy to cause the cylinder barrel and the cylinder head to loosen, and thus the gas is not easy to leak from the joint part of the cylinder barrel and the cylinder head, this structure does not have universality and cannot meet the current demand for automation.

[0005] At present, there is no mature and reliable special tooling fixture for the tightening and assembly process of cylinder barrels and cylinder heads in Chinese cylinder production enterprises. Most enterprises still adopt the above-mentioned method of manually clamping the cylinder barrel with a crowbar.

[0006] Therefore, it is particularly necessary to develop a multi-link type lifting clamping shaft mechanism with self-locking at the top and bottom dead center positions, which is simple in structure, low in cost, convenient and practical, as a special tooling fixture for tightening and assembling cylinder barrels and cylinder heads. Summary of the Invention

[0007] The object of the present invention is to overcome the above-mentioned deficiencies existing in the prior art, and to provide a multi-link type lifting chuck shaft mechanism with self-locking at the top and bottom dead center positions, which has a simple and reasonable structural design, is safe and reliable, has a low cost, is convenient to operate and maintain, reduces the labor intensity of workers, improves the degree of automation, and has good stability of assembly quality.

[0008] The technical solution adopted by the present invention to solve the above problems is: the multi-link type lifting chuck shaft mechanism with self-locking at the top and bottom dead center positions includes a frame and a bottom plate, and the bottom plate is fixed on the frame. It is characterized in that it further includes a guiding slider, a lifting rod, a chuck shaft, a pressure rod, a pin shaft mounting support, a locking push rod, a small slider, a spring support, a spring plunger, a top dead center position limiting block and a bottom dead center position limiting block. The lifting rod is movably arranged in the guiding slider. One end of the lifting rod is connected to the chuck shaft, and the other end of the lifting rod is connected to the pressure rod. The pressure rod is connected to the pin shaft mounting support, and the pin shaft mounting support is mounted on the bottom plate. One end of the locking push rod is connected to the pressure rod, and the other end of the locking push rod is connected to the small slider. The small slider is movably arranged on the bottom plate. The spring support is fixed on the bottom plate, the spring plunger is mounted on the spring support, the spring plunger contacts the small slider, and the top dead center position limiting block and the bottom dead center position limiting block are both mounted on the bottom plate.

[0009] Preferably, the pressure rod is successively provided with a pin shaft hole for connecting with the pin shaft mounting support, a U-shaped groove hole for connecting with the bottom of the lifting rod, and a pin shaft hole for connecting with the locking push rod from left to right, and the U-shaped groove hole is located between the two pin shaft holes.

[0010] Preferably, the bottom plate is provided with a horizontal U-shaped groove hole, and the central axis of the horizontal U-shaped groove hole, the center position of the pin shaft hole of the pin shaft mounting support and the central axis of the spring plunger are at the same horizontal height position.

[0011] Preferably, the left end of the pressure rod is hinged to the pin shaft mounting support through a pin shaft, the right end of the pressure rod is hinged to one end of the locking push rod through a pin shaft, and the other end of the locking push rod is hinged to the small slider through a pin shaft.

[0012] Preferably, the small slider is mounted in the horizontal U-shaped groove hole of the bottom plate, and the small slider moves horizontally in a straight line in the horizontal U-shaped groove hole.

[0013] Preferably, the lower end of the lifting rod is connected to the U-shaped groove hole of the pressure rod through a pin shaft.

[0014] Preferably, the lifting rod is vertically mounted in the guiding slider and forms a translational kinematic pair with it.

[0015] Preferably, the spring bracket, the guide slider, the pin shaft mounting seat, the top dead center position limiting block and the bottom dead center position limiting block of the present invention are all fixed on the bottom plate by bolts.

[0016] Preferably, the bottom plate of the present invention is fixed on the frame by bolts.

[0017] Compared with the prior art, the present invention has the following advantages and effects: 1. The overall structure design is simple and reasonable, with low cost, reliable and durable, convenient for operation and maintenance, reducing the labor intensity of workers, improving the automation degree, improving the assembly efficiency, and having good stability of assembly quality; 2. The top and bottom dead center positions of the lifting clamping shaft mechanism can be self-locked, and the self-locking force can be adjusted by changing the spring constant and the spring compression length of the plunger spring; 3. It has good versatility and strong applicability. Only by adjusting the type of the clamping shaft structure, adjusting the positions of the top and bottom dead center limiting blocks, and adjusting the locking force, it is very suitable as a special tooling fixture for tightening and assembling the cylinder barrel and cylinder head of hydraulic cylinder products, and can also be widely popularized and applied in other industrial production and manufacturing fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural view of the lifting clamping shaft mechanism of the embodiment of the present invention at the top dead center position.

[0019] Figure 2 is a schematic structural view of the lifting clamping shaft mechanism of the embodiment of the present invention at the bottom dead center position.

[0020] In the figure: frame 1, spring bracket 2, spring plunger 3, small slider 4, locking push rod 5, guide slider 6, lifting rod 7, clamping shaft 8, bottom plate 9, top dead center position limiting block 10, pin shaft mounting seat 11, pressure rod 12, bottom dead center position limiting block 13. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present invention will be further described in detail below with reference to the drawings and through embodiments. The following embodiments are explanations of the present invention and the present invention is not limited to the following embodiments.

[0022] Embodiment

[0023] See Figures 1 to 2 , the multi-link type lifting clamping shaft mechanism with self-locking at the top and bottom dead center positions of this embodiment mainly includes a spring bracket 2, a spring plunger 3, a small slider 4, a locking push rod 5, a guide slider 6, a lifting rod 7, a clamping shaft 8, a top dead center position limiting block 10, a pin shaft mounting seat 11, a pressure rod 12 and a bottom dead center position limiting block 13.

[0024] In this embodiment, the bottom plate 9 is fixed to the frame 1 by bolts, the guiding slider 6 is installed on the bottom plate 9 by bolts, and the lifting rod 7 is vertically installed in the guiding slider 6 to form a translational pair of motion, such that the lifting rod 7 can only perform linear motion up and down under the constraint of the guiding slider 6.

[0025] In this embodiment, the clamping shaft 8 is fixedly installed at the upper end of the lifting rod 7, the lower end of the lifting rod 7 is connected to the U-shaped slot hole of the pressure lever 12 through a pin shaft, the left end of the pressure lever 12 is hinged to the pin shaft installation support 11 through a pin shaft, and the pin shaft installation support 11 is fixed to the bottom plate 9 by bolts, such that the pressure lever 12 can only rotate around the pin shaft.

[0026] In this embodiment, the right end of the pressure lever 12 is hinged to one end of the locking push rod 5 through a pin shaft, the other end of the locking push rod 5 is hinged to the small slider 4 through a pin shaft, and the small slider 4 is installed in the horizontal U-shaped slot of the bottom plate 9 to form a translational pair of motion, such that the small slider 4 can only perform linear motion horizontally under the constraint of the U-shaped slot.

[0027] In this embodiment, the spring support 2 is installed on the bottom plate 9 by bolts, the spring plunger 3 is fixed to the spring support 2, and the left end of the spring plunger 3 abuts against the small slider 4 and always maintains a horizontal leftward thrust on the small slider 4.

[0028] In this embodiment, the upper dead point position limiting block 10 is fixed to the bottom plate 9 by bolts to limit the upper limit position of the counterclockwise rotation of the pressure lever 12; the lower dead point position limiting block 13 is fixed to the bottom plate 9 by bolts to limit the lower limit position of the clockwise rotation of the pressure lever 12.

[0029] In this embodiment, the pressure lever 12 is successively provided with a pin shaft hole for connecting with the pin shaft installation support 11, a U-shaped slot hole for connecting with the bottom of the lifting rod 7, and a pin shaft hole for connecting with the locking push rod 5 from left to right, and the U-shaped slot hole is located between the two pin shaft holes.

[0030] In this embodiment, the bottom plate 9 is provided with a horizontal U-shaped slot hole, and it should be ensured that the central axis of the horizontal U-shaped slot hole, the center position of the pin shaft hole of the pin shaft installation support 11, and the central axis of the spring plunger 3 are at the same horizontal height position.

[0031] The working principle of this embodiment is as follows: The pressure lever 12 is used as the operating lever, and the left end of the pressure lever 12 is the operating end. When the left end of the pressure lever 12 is pressed downward, the right end of the pressure lever 12 will drive the lifting rod 7 and the clamping shaft 8 to move vertically upward, and the thrust generated by the spring plunger 3 will be transmitted through the locking push rod 5 to generate an upward thrust on the lifting rod 7, and this thrust can lock the lifting rod 7 and the clamping shaft 8 at the upper dead point position; when the left end of the pressure lever 12 is lifted upward, the right end of the pressure lever 12 will drive the lifting rod 7 and the clamping shaft 8 to move vertically downward, and the thrust generated by the spring plunger 3 will be transmitted through the locking push rod 5 to generate a downward pulling force on the lifting rod 7, locking the lifting rod 7 and the clamping shaft 8 at the lower dead point position.

[0032] In this embodiment, the lifting and clamping shaft mechanism can be self-locked at the upper and lower dead center positions by using the horizontal thrust generated by the spring plunger 3. Moreover, by changing the spring constant and the spring compression length of the plunger spring 3, the self-locking force can be adjusted. This eliminates the cumbersome locking device, features a simple structure, convenient operation, reliable durability, low manufacturing cost, and easy installation and maintenance.

[0033] Through the above description, those skilled in the art can already implement it.

[0034] In addition, it should be noted that for the specific embodiments described in this specification, the shapes and names of the components can be different. The above content described in this specification is only an example of the structure of the present invention. Any equivalent changes or simple changes made according to the structure, features, and principles conceived in this invention patent are included in the protection scope of this invention patent. Those skilled in the technical field to which this invention belongs can make various modifications, supplements, or use similar methods for substitution to the specific embodiments described, as long as they do not deviate from the structure of this invention or exceed the scope defined by this claims, they should all belong to the protection scope of this invention.

Claims

1. A multi-link lifting spindle mechanism with self-locking at the top and bottom dead center positions, comprising a frame and a base plate, the base plate being fixed on the frame, characterized in that: It further includes a guiding slider, a lifting rod, a clamping shaft, a pressing rod, a pin shaft mounting support, a locking push rod, a small slider, a spring support, a spring plunger, an upper dead point position limiting block and a lower dead point position limiting block. The lifting rod is movably arranged in the guiding slider. One end of the lifting rod is connected to the clamping shaft, and the other end of the lifting rod is connected to the pressing rod. The pressing rod is connected to the pin shaft mounting support, and the pin shaft mounting support is mounted on the bottom plate. One end of the locking push rod is connected to the pressing rod, and the other end of the locking push rod is connected to the small slider. The small slider is movably arranged on the bottom plate. The spring support is fixed on the bottom plate. The spring plunger is mounted on the spring support, and the spring plunger contacts the small slider. The upper dead point position limiting block and the lower dead point position limiting block are both mounted on the bottom plate. The pressing rod is successively provided with a pin shaft hole for connecting with the pin shaft mounting support, a U-shaped groove hole for connecting with the bottom of the lifting rod, and a pin shaft hole for connecting with the locking push rod from left to right, and the U-shaped groove hole is located between the two pin shaft holes. The bottom plate is provided with a horizontal U-shaped groove hole, and the central axis of the horizontal U-shaped groove hole, the center position of the pin shaft hole of the pin shaft mounting support and the central axis of the spring plunger are at the same horizontal height position.

2. The multi-link lifting spindle mechanism with self-locking at the top and bottom dead center positions according to claim 1, characterized in that: The left end of the pressing rod is hinged to the pin shaft mounting support through a pin shaft, the right end of the pressing rod is hinged to one end of the locking push rod through a pin shaft, and the other end of the locking push rod is hinged to the small slider through a pin shaft.

3. The multi-link lifting spindle mechanism with self-locking at the top and bottom dead center positions according to claim 1, characterized in that: The small slider is mounted in the horizontal U-shaped groove hole of the bottom plate, and the small slider moves horizontally in a straight line in the horizontal U-shaped groove hole.

4. The multi-link lifting spindle mechanism with self-locking at the top and bottom dead center positions according to claim 1, characterized in that: The lower end of the lifting rod is connected to the U-shaped groove hole of the pressing rod through a pin shaft.

5. The multi-link lifting spindle mechanism with self-locking at the top and bottom dead center positions according to claim 1, characterized in that: The lifting rod is vertically mounted in the guiding slider and forms a translation pair with it.

6. The multi-link lifting spindle mechanism with self-locking at the top and bottom dead center positions according to claim 1, characterized in that: The spring support, the guiding slider, the pin shaft mounting support, the upper dead point position limiting block and the lower dead point position limiting block are all fixed on the bottom plate through bolts.

7. The multi-link lifting spindle mechanism with self-locking at the top and bottom dead center positions according to claim 1, characterized in that: The bottom plate is fixed on the machine frame through bolts.

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