High-precision vertical clamp

Abstract

The application provides a high-precision vertical clamp, which comprises a shell, a main shaft arranged in the shell, a motor for driving the main shaft to rotate through a belt and a pulley, an outer clamping overhang rotating synchronously with the main shaft, an outer push-pull fixing body fixedly connected with the outer clamping overhang, a guide groove arranged in the outer push-pull fixing body, at least two groups of clamping jaws rotating synchronously with the outer push-pull fixing body and arranged in the guide groove, elastic clamping blocks connecting the two groups of clamping jaws, and a rotary oil cylinder for driving the clamping jaws to perform a vertical clamping action on a workpiece in the guide groove. The application can improve the precision of clamping the workpiece and the precision of machining the workpiece.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of clamps, in particular to a high-precision vertical clamp. BACKGROUND

[0002] There are many workpieces with circular features in part processing, especially annular workpieces, and most of their welding, polishing and polishing processes are completed by manual work. The clamping degree of the clamp is adjusted manually, and automation production cannot be achieved, which is not efficient. The existing mechanical clamping is usually not synchronous rotation between the clamp and the rotating main shaft, and the differential rotation between the two is realized through bearings. However, this method usually causes rotation jamming at the connection end surface. In addition, the accuracy of clamping cannot be guaranteed due to angle deviation, especially for workpieces with large diameters, which further affects the machining accuracy of the workpieces. SUMMARY

[0003] The present application aims at the deficiencies of the prior art, and provides a high-precision vertical clamp, which solves the problem of low machining accuracy by setting the clamp and the main shaft as a whole and using the cooperation between the guide groove taper surface and the clamping jaw.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A high-precision vertical clamp, comprising a housing, a main shaft arranged in the housing, and a motor driving the main shaft to rotate through a conveyor belt and a pulley, further comprising an outer clamping overhang seat rotating synchronously with the main shaft and an outer push-pull fixed body fixedly connected with the outer clamping overhang seat, wherein the outer push-pull fixed body is provided with a guide groove.

[0006] At least two groups of clamping jaws rotating synchronously with the outer push-pull fixed body and elastic clamping blocks connecting the two groups of clamping jaws are arranged in the guide groove.

[0007] A rotary oil cylinder driving the clamping jaws to perform a vertical clamping action on the workpiece in the guide groove synchronously with the main shaft.

[0008] Preferably, the guide groove is tapered with an increasing inner diameter away from the outer clamping overhang seat, and the clamping jaw is in contact with the taper surface of the guide groove.

[0009] Preferably, each group of clamping jaws and elastic clamping blocks are provided with a workpiece placing groove.

[0010] Preferably, the clamping jaw is provided with a limiting groove, and the outer clamping limiting pin is arranged in the outer push-pull fixed body in a penetrating manner.

[0011] Preferably, a working space is jointly arranged between the outer clamping overhang seat and the outer push-pull fixed body, and an outer push-pull fixed seat is defined in the working space. The outer push-pull fixed seat is annular, and the outer clamping plug is arranged at the inner ring of the outer push-pull fixed seat.

[0012] Preferably, a limiting groove is formed on the outer periphery of the outer clamping plug, and an outer clamping top screw penetratingly arranged in the outer push-pull fixing base cooperates with the limiting groove.

[0013] Preferably, the rotary oil cylinder is arranged at one end of the main shaft away from the outer clamping plug, and an output end of the rotary oil cylinder is connected with a pull rod, the pull rod extends to the inside of the working space through the inside of the main shaft, and one end of a guide member connected with the pull rod through a connecting piece is arranged in a guide groove formed in the outer push-pull fixing base, and the other end of the guide member is connected with an outer push-pull member for driving the action of the clamping jaw.

[0014] Preferably, a push-pull groove cooperated with the outer push-pull member is formed on the clamping jaw.

[0015] Preferably, the one end of the main shaft away from the outer push-pull fixing body is a tapered surface with gradually decreasing diameter, and a tensioning sleeve matched with the shape of the tapered surface is arranged on the tapered surface and used for positioning the tensioning of the pulley.

[0016] The present application has the advantages of:

[0017] (1) The clamping jaw and the main shaft are designed as an integral structure, so that the clamping jaw can rotate synchronously with the main shaft, avoiding the problem of differential speed between the clamping jaw and the main shaft, and the problem of rotation jam at the connecting end face and affecting the machining precision.

[0018] (2) The clamping jaw is horizontally moved by the rotary oil cylinder under the guidance of the tapered surface, and the clamping jaw is vertically clamped to the workpiece, and the high-precision clamping of the workpiece is realized by the cooperation of the groove bottom of the placing groove and the limiting of the workpiece in the horizontal direction, and the elastic clamping block can realize the clamping and releasing operation by controlling the horizontal movement of the clamping jaw, which is convenient and saves resources.

[0019] (3) The pulley is positioned by the tensioning sleeve, which simplifies the structure, reduces the number of parts used, and reduces the cost, and the simple structure makes the production and assembly simple, and improves the production efficiency.

[0020] In summary, the present application has the advantages of increasing the clamping precision of the workpiece and the machining precision, and improving the production efficiency and saving resources. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0022] Figure 2 It is a schematic diagram of the main structure of the present application;

[0023] Figure 3 It is Figure 2A local enlarged view of the middle I;

[0024] Figure 4 A schematic view of the cooperation between the clamping jaw and the elastic clamping block of the present application; Figure 2 A local enlarged view of the middle II;

[0025] Figure 5 A schematic view of the cooperation between the clamping jaw and the elastic clamping block of the present application;

[0026] Figure 6 A schematic view of the cooperation between the clamping jaw and the elastic clamping block of the present application;

[0027] Figure 7 A schematic view of the cooperation between the clamping jaw and the elastic clamping block of the present application;

[0028] Figure 8 A schematic view of the cooperation between the clamping jaw and the elastic clamping block of the present application;

[0029] Figure 9 A local enlarged view of the middle I; Figure 8 A local enlarged view of the middle I;

[0030] Figure 10 A schematic view of the cooperation between the clamping jaw and the elastic clamping block of the present application;

[0031] Figure 11 A schematic view of the cooperation between the clamping jaw and the elastic clamping block of the present application; DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0033] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified.

[0034] Embodiment one

[0035] As Figures 1-4 shown, the present embodiment provides a high-precision vertical clamp, which comprises a shell 1, a main shaft 2 arranged in the shell 1, and a motor 5 driving the main shaft 2 to rotate through a conveying belt 3 and a pulley 4, characterized in that it further comprises an outer clamping overhang seat 6 rotating synchronously with the main shaft 2 and an outer push-pull fixing body 7 fixedly connected therewith, the outer push-pull fixing body 7 being provided with a guide groove 71;

[0036] At least two groups of clamping jaws 72 rotating synchronously with the outer push-pull fixing body and elastic clamping blocks 73 connecting the two groups of clamping jaws 72 are arranged in the guide groove 71;

[0037] and a rotary oil cylinder 74 driving the clamping jaws 72 to perform a vertical clamping action on a workpiece 8 in the guide groove 71 synchronously with the main shaft 2.

[0038] In the present embodiment, the outer clamping overhang seat 6, the outer push-pull fixing body 7 and the clamping jaws 72 all rotate synchronously with the main shaft 2, which is compared with the design of the clamping jaws 72 being fixed in the prior art to avoid the situation that the clamping jaws 72 are stuck at the contact end of the main shaft. In order to increase the smoothness of the rotation of the main shaft 2, a bearing 75 is adaptively arranged between the shell 1 and the main shaft 2, the bearing at this position is selected as a cylindrical roller bearing, the shell 1 and the outer clamping overhang seat 6 are detachably connected, and the maintenance convenience of the clamp is increased; the clamping jaws 72 are provided with three groups, and the three groups of clamping jaws 72 are all vulcanized together through the rubber structure in the elastic clamping blocks 73.

[0039] Combined Figure 4 shown, the guide groove 71 is tapered in shape with an increasing inner diameter away from the outer clamping overhang seat 6, and the clamping jaws are in contact with the tapered surface of the guide groove.

[0040] In the embodiment, the tapered surface of the guide groove 71 can cause the three clamping jaws 72 to simultaneously contract and press the elastic clamping block 73 when the rotary oil cylinder 74 pulls the clamping jaws 72 to move inward, so as to realize vertical clamping of the workpiece 8. When the rotary oil cylinder 74 pushes the clamping jaws 72 to move outward, the elastic clamping block 73 releases the elastic force to drive the three clamping jaws 72 to move away from each other. Compared with the mode of using an external power source to push the three clamping jaws 72 to simultaneously move close to the workpiece 8, the mode is more energy-saving, has better stability, and is more convenient.

[0041] As shown in the combination Figures 4-6 Each set of clamping jaws 72 and the elastic clamping block 73 are provided with a workpiece placing groove 76.

[0042] In the embodiment, the workpiece placing groove 76 is used to place the workpiece 8, which can ensure that the insertion depth of each workpiece 8 is the same, and when the workpiece 8 is completely inserted, the workpiece 8 cannot move in the radial direction of the workpiece 8, thereby increasing the stability of clamping the workpiece 8.

[0043] As shown in the combination Figure 7 The clamping jaw 72 is provided with a limiting groove 721, and the outer push-pull fixed body 7 is provided with an outer clamping limiting pin 722 penetratingly arranged and matched with the limiting groove 721.

[0044] In the embodiment, the outer clamping limiting pin 722 is fixed in the outer push-pull fixed body 7 through an outer clamping top screw 723. The outer clamping limiting pin 722 matched with the limiting groove 721 can prevent the clamping jaw 72 from moving inward excessively to excessively press the elastic clamping block 73 beyond the elastic deformation amount of the elastic clamping block 73, thereby damaging the elastic clamping block 73, and can also prevent the workpiece 8 from being clamped excessively to cause clamping marks on the surface of the workpiece 8.

[0045] As shown in the combination Figure 4 The outer clamping excessive seat 6 and the outer push-pull fixed body 7 are jointly provided with a working space 61, and the working space 61 is limited by an outer push-pull fixed seat 611. The outer push-pull fixed seat 611 is annular, and the inner ring thereof is provided with an outer clamping plug 612.

[0046] In the embodiment, the outer clamping plug 612 is used for secondary limiting of the clamping jaw 72 to prevent it from being excessively deep.

[0047] As shown in the combination Figure 9 The outer periphery of the outer clamping plug 612 is provided with a limiting groove 613, and the outer push-pull fixed seat 611 is provided with an outer clamping top screw 614 penetratingly arranged and matched with the limiting groove 613.

[0048] In the embodiment, the limiting groove 613 is annular, when limiting the limiting groove 613 by using the outer clamping top screw 614, only the outer clamping top screw 614 is screwed to abut against the limiting groove 613 to limit the outer clamping plug 612, compared with the mode that a single cylindrical groove cooperates with the outer clamping top screw 614, the annular limiting groove 613 can make the cooperation installation more convenient.

[0049] In combination Figure 10 As shown, the rotary oil cylinder 74 is arranged at one end of the main shaft 2 away from the outer clamping overhang 6, and the output end of the rotary oil cylinder 74 is connected with the pull rod 62, the pull rod 62 extends to the inside of the working space 61 through the inside of the main shaft 2, and one end of the pull rod 62 is connected with the guide 91 through the connecting piece 9, the outer push-pull fixed seat 611 is provided with a guide groove 615, the guide 91 slides in the guide groove 615, and the other end of the guide 91 is connected with the outer push-pull piece 92 for driving the action of the clamping jaw 72.

[0050] In the embodiment, the screw 93 is threadedly connected in the push-pull piece 92, the screw 93 extends to the inside of the connecting piece 9 through the guide 91 in the direction of the connecting piece 9 to fix the three, and the guide groove 615 can guide the guide 91 to increase the stability when the push-pull piece 92 moves; in some embodiments, the guide 91 can also be designed to be integrated with the push-pull piece 92 to reduce the installation difficulty.

[0051] In combination Figure 10 As shown, the clamping jaw 72 is provided with a push-pull groove 93 matched with the outer push-pull piece 92.

[0052] In the embodiment, the clamping jaw 72 is pushed and pulled by the outer push-pull piece 92 clamped into the push-pull groove 93, so that the clamping jaw 72 can be conveniently replaced alone, and the clamping jaw 72 is not replaced together with the outer push-pull piece 92 when the clamping jaw 72 is damaged.

[0053] In combination Figure 11 As shown, one end of the main shaft 2 away from the outer push-pull fixed body 7 is a tapered surface with a gradually decreasing diameter, and the tapered surface is provided with a tensioning sleeve 41 matched with the shape thereof and used for tensioning and positioning the belt pulley 4.

[0054] In the embodiment, the tensioning sleeve 41 is detachably connected with the end surface of the main shaft 2, the left side of the tensioning sleeve 41 is provided with a fixing piece 42, and the left side of the fixing piece 42 is fixedly connected with the rotary oil cylinder 74.

[0055] Working principle

[0056] In use, the workpiece 8 is placed in the workpiece placing groove, the rotary oil cylinder 74 is started, the pull rod 62 is moved to the left, the clamping jaw 72 is moved to the left through the connecting piece 9, the guide piece 91 and the push-pull piece 92, the clamping jaw 72 is inwards contracted under the action of the guide groove 71, the elastic clamping block 73 is extruded, and then the workpiece 8 is clamped, when the outer clamping limiting pin 722 is in abutment with the limiting groove 721, it is the maximum clamping limit, the clamping jaw 72 cannot continue to move to the left, the workpiece is protected from appearing clamping marks, the motor 5 is started, the motor output end drives the main shaft to rotate through the belt 3 and the pulley 4, and then the outer clamping overhanging seat 6 and the outer push-pull fixed body 7 fixedly connected with the main shaft 2 are rotated, so that the clamping jaw 72 and the clamp 8 are rotated, the workpiece 8 is machined, the rotary oil cylinder 74 is controlled to drive the clamping jaw 72 to move to the right, with the diameter of the guide groove 71 gradually increasing, the elastic clamping block 73 releases the elastic force to drive the three clamping jaws 72 to separate, so that the workpiece 8 is loosened.

[0057] The above only describes the preferred embodiments of the present application and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-precision vertical clamp comprising a housing, a main shaft provided in the housing, and a motor that drives the main shaft to rotate by a belt and a pulley, characterized by, The outer clamping overhang seat and the outer push-pull fixing body fixedly connected with the outer clamping overhang seat are synchronously rotated with the main shaft, and the outer push-pull fixing body is provided with a guide slot; At least two groups of clamping jaws synchronously rotated with the outer push-pull fixing body and elastic clamping blocks connecting the two groups of clamping jaws are arranged in the guide slot; A rotary oil cylinder synchronously rotated with the main shaft is arranged to drive the clamping jaws to perform a vertical clamping action on the workpiece in the guide slot; The clamping jaws are provided with a limiting slot, and the outer clamping limiting pin matched with the limiting slot is arranged through the outer push-pull fixing body; The outer push-pull fixing seat is defined in the working space between the outer clamping overhang seat and the outer push-pull fixing body, the outer push-pull fixing seat is annular, and the outer clamping plug is arranged at the inner ring of the outer push-pull fixing seat; The rotary oil cylinder is arranged at the end of the main shaft away from the outer clamping overhang seat, the output end of the rotary oil cylinder is connected with a pull rod, the pull rod extends to the inside of the working space through the inside of the main shaft, and one end of a guide element connected with the pull rod through a connecting piece is connected with the outer push-pull fixing seat, the outer push-pull fixing seat is provided with a guide slot, the guide element slides in the guide slot, and the other end of the guide element is connected with an outer push-pull element for driving the clamping jaws to act. The clamping jaws are provided with a push-pull slot matched with the outer push-pull element.

2. A high precision vertical fixture according to claim 1, wherein The guide slot is tapered in the direction away from the outer clamping overhang seat, and the clamping jaws are attached to the tapered surface of the guide slot.

3. The high precision vertical fixture of claim 1, wherein, Each group of clamping jaws and elastic clamping blocks are collectively provided with a workpiece placing slot.

4. The high precision vertical fixture of claim 1, wherein, The outer periphery of the outer clamping plug is provided with a limiting slot, and the outer clamping top pin matched with the limiting slot is arranged through the outer push-pull fixing seat.

5. The high precision vertical fixture of claim 1, wherein, The end of the main shaft away from the outer push-pull fixing body is tapered in diameter, and the tapered surface is provided with a tensioning sleeve matched with the shape of the tapered surface for tensioning and positioning the belt wheel.

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