Eccentric shaft workpiece machining tool clamp

Abstract

The utility model discloses an eccentric shaft workpiece machining tool clamp which comprises a tool base, and a plurality of discharging grooves are formed in the top of the tool base. The clamp further comprises a positioning mechanism used for positioning a workpiece. The positioning mechanism comprises long adjusting rods symmetrically arranged on the two sides, and long adjusting through cavities corresponding to the long adjusting rods are formed in the tool base. The positioning mechanism further comprises a plurality of positioning seats, and the positioning seats are located in the discharging groove; the positioning base is fixedly connected to the long adjusting rod through a short sliding rod, and the short sliding rod is connected with the tool base in a sliding mode. The two ends of the long adjusting rod are slidably connected with long screw rods correspondingly. The long screw rod is in threaded connection with a pushing nut for pushing the long adjusting rods to be close to each other; in the process that the long adjusting rods get close to each other, the positioning seat clamps the lower end of the eccentric shaft blank; and the long screw rod is fixedly connected to the tool base. According to the device, the eccentric shaft is positioned in an efficient and temperature mode, the machining and positioning efficiency is greatly improved, the positioning mode is simple, and synchronous positioning operation is easy.

Description

Technical Field

[0001] The utility model belongs to the technical field of eccentric shaft workpiece processing, in particular to an eccentric shaft workpiece processing tooling fixture. Background Art

[0002] The eccentric shaft is a workpiece whose outer circle is parallel to the axis of the outer circle but does not overlap. It is mainly used for the eccentric movement of mechanical parts. For example, when the eccentric shaft is installed on a motor, the eccentric shaft moves in a cam-like trajectory under the drive of the motor.

[0003] Eccentric shafts are widely used in industry, such as pump bodies, engines, etc. Eccentric shafts vary in size, shape, and structure depending on their use. The eccentric shaft mainly includes an upper shaft body and a lower shaft body that is not concentrically arranged. In addition, the upper shaft body and the lower shaft body often have different shaft radii.

[0004] During the production process, the eccentric shaft has a shaft structure, and it also needs to be milled, bored, slotted, etc. on the shaft structure to meet the installation requirements. At present, CNC lathes are mostly used to process the workpiece. Specifically, the workpiece is mostly positioned by a fixture and installed on the material table of the lathe. As the milling cutter equipment processes the workpiece, structures such as mounting holes, mounting grooves, and chamfers are formed on the eccentric shaft.

[0005] However, there are eccentric shafts, especially workpieces with large differences in shape and size between the upper shaft body and the lower shaft body. During the processing, the shaft blank is placed on the fixture. Because of its large irregularity and unstable center of gravity, it is relatively cumbersome to position the workpiece blank. First, the fixture needs to be positioned through a large number of positioning structures, mostly using bolt structures. During the positioning process, the upper shaft body and the lower shaft body need to be positioned separately, resulting in too many positioning structures and too cumbersome operation. During the positioning process, it is easy for some positioning bolts to fail to tighten, resulting in low positioning stability. Specifically, there are too many positioning bolts, and it is impossible to ensure that each bolt can be effectively positioned during positioning. Utility Model Content

[0006] Based on the above background, the purpose of the utility model is to provide an eccentric shaft workpiece processing fixture.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] An eccentric shaft workpiece processing fixture comprises a fixture base, wherein a plurality of material discharge grooves are provided on the top of the fixture base;

[0009] The eccentric shaft workpiece processing fixture also includes a positioning mechanism for positioning the workpiece;

[0010] The positioning mechanism comprises long adjustment rods symmetrically arranged on both sides, and the tooling base is provided with a long adjustment cavity corresponding to the long adjustment rods;

[0011] The positioning mechanism also includes a plurality of positioning seats fixedly connected to the side walls of the long adjustment rod facing each other, and the positioning seats are located in the discharge trough;

[0012] The positioning seat is fixedly connected to the long adjustment rod through a short sliding rod, and the short sliding rod is slidably connected to the tooling base;

[0013] The two ends of the long adjustment rod are respectively slidably connected with long screw rods; the long screw rods are threadedly connected with pushing nuts for pushing the long adjustment rods to move closer to each other;

[0014] When the long adjustment rods are approaching each other, the positioning seat is clamped to the lower end of the eccentric shaft blank;

[0015] The long screw is fixedly connected to the tooling base.

[0016] Preferably, two rows of material troughs are arranged on the top of the tooling base; each row is provided with a plurality of equidistant material troughs in the front and rear directions;

[0017] The eccentric shaft workpiece processing fixture comprises a positioning mechanism symmetrically arranged on left and right sides for positioning the workpiece.

[0018] Preferably, the front and rear ends of the long adjustment rod are respectively fixedly connected with a slide seat located outside the long adjustment cavity;

[0019] The sliding seat is slidably connected to the long screw rod.

[0020] Preferably, end fixing plates fixedly connected to the long screw rod are respectively welded to the front and rear side walls of the tooling base.

[0021] Preferably, a through hole connecting the material discharge trough and the long adjustment cavity is provided in the tooling base, and the short sliding rod is slidably connected to the through hole.

[0022] Preferably, the top of the discharge trough is fixedly connected to a limiting cylinder seat for limiting the position of the eccentric shaft blank, and the upper end of the eccentric shaft blank is limited in the limiting cylinder seat.

[0023] Preferably, a top annular plate is fixedly connected to the top of the limiting cylinder seat, and a plurality of pressing plate members for pressing the eccentric shaft blank are fixedly assembled and connected to the top annular plate.

[0024] Preferably, the press plate member comprises a longitudinal sliding screw fixed on the top annular plate;

[0025] A pressing plate is slidably connected to the longitudinal sliding screw, and a pressing nut for pressing the pressing plate is threadedly connected to the longitudinal sliding screw.

[0026] Preferably, a spring is sleeved on the longitudinal sliding screw, and the top and bottom of the spring are fixedly connected to the bottom of the pressure plate and the top of the top annular plate.

[0027] The utility model has the following beneficial effects:

[0028] 1. During the working process, the operator discharges the eccentric shaft blank into the discharge trough. At this time, the lower shaft body of the eccentric shaft is limited in the discharge trough (the lower shaft body of the eccentric shaft is not coaxial with the upper shaft body). At this time, the operator pushes the long adjustment rods on both sides to each other and clamps them to the lower shaft body of the eccentric shaft blank. Then the operator pushes the push nuts on both sides to each other. At this time, the long adjustment rod continues to carry the positioning seat to each other and clamp the workpiece. In the above manner, the lower ends of multiple eccentric shaft workpieces can be positioned at one time in a simple manner, thereby greatly improving the processing positioning efficiency. In addition, the positioning method is simple and the positioning stability is high.

[0029] 2. During the working process, the operator adjusts the pressing nut by the tool, and the pressing nut pushes down to press the pressing plate on one side of the upper shaft body of the eccentric shaft blank. Then the workpiece is positioned by the downward pressing method. In cooperation with the positioning method from the lower end of the positioning seat, the upper shaft body and the lower shaft body of the eccentric shaft are fully positioned in an up-down classification manner according to the shape characteristics of the eccentric shaft, thereby maintaining the high stability of the positioning of the entire shaft blank. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0031] Figure 1 It is a schematic diagram of the overall structure in an embodiment of the utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the positioning mechanism in the embodiment of the utility model;

[0033] Figure 3 This is a schematic diagram of the structure of the positioning seat in the embodiment of the utility model;

[0034] Figure 4 This is a schematic diagram of the structure of the press plate in the embodiment of the utility model;

[0035] Figure 5This is a schematic diagram of the structure in which the long adjustment rod is located in the long adjustment cavity in the embodiment of the utility model;

[0036] Figure 6 It is a structural schematic diagram of the eccentric shaft blank in the embodiment of the utility model.

[0037] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0041] Example 1

[0042] like Figure 1-6 As shown, a tooling fixture for machining an eccentric shaft workpiece includes a tooling base 1, and a plurality of material discharge troughs are provided on the top of the tooling base 1. Specifically, two rows of material discharge troughs are provided on the top of the tooling base 1; each row has a plurality of material discharge troughs arranged at equal distances in the front and rear directions.

[0043] The eccentric shaft workpiece processing fixture also includes a positioning mechanism 2 for positioning the workpiece; specifically, each row of material troughs is provided with a corresponding positioning mechanism 2. The positioning mechanism 2 is used to position the eccentric shaft workpiece on each row.

[0044] Specifically, each positioning mechanism 2 includes long adjustment rods symmetrically arranged on the left and right sides, and correspondingly, a long adjustment cavity corresponding to the long adjustment rod is opened on the tooling base 1 (the long adjustment rod is located in the long adjustment cavity, and its front and rear ends are located outside the long adjustment cavity, and the long adjustment cavity has a certain width, and the long adjustment rod can move left and right in the long adjustment cavity).

[0045] The positioning mechanism 2 further comprises a plurality of positioning seats 23 fixedly connected to the mutually facing side walls of the long adjusting rods 22 (ie, the mutually facing side walls of the long adjusting rods 22 on the left and right sides are respectively fixedly connected to the positioning seats 23 located in the discharge trough).

[0046] The above-mentioned positioning seat 23 is fixedly connected to the long adjustment rod 22 through a short sliding rod 232, and the short sliding rod 232 is slidably connected to the tooling base 1 (specifically: a through hole connecting the discharge trough and the long adjustment cavity 12 is opened in the tooling base 1, and the short sliding rod 232 is slidably connected to the through hole).

[0047] At the same time, the two ends of the long adjustment rod 22 are respectively slidably connected with the long screw 21 (the front and rear side walls of the tooling base 1 are respectively welded with end fixing plates 11 fixedly connected to the long screw 21). The sliding mode is: the front and rear ends of the long adjustment rod 22 are respectively fixedly connected with a slide seat 221 located outside the long adjustment cavity 12; the slide seat 221 is slidably connected to the long screw 21.

[0048] The long screw rod 21 is threadedly connected with a pushing nut 211 for pushing the long adjustment rods 22 to move closer to each other (specifically, the pushing nut 211 pushes the slide seat 221 ).

[0049] During the working process, the operator discharges the eccentric shaft blank into the discharge trough. At this time, the lower shaft body of the eccentric shaft is limited in the discharge trough (the lower shaft body of the eccentric shaft is not coaxial with the upper shaft body). At this time, the operator pushes the long adjustment rods 22 on both sides to approach each other and clamps and positions them on the lower shaft body of the eccentric shaft blank with the positioning seat 23. Then the operator pushes the push nuts 211 on both sides to approach each other. At this time, the long adjustment rod 22 continues to carry the positioning seat 23 to approach each other and clamp the workpiece.

[0050] In the above manner, the lower ends of a plurality of eccentric shaft workpieces can be positioned at one time in a simple manner.

[0051] In the process of pushing the long adjusting rod 22, the short sliding rod 232 slides through the through hole. After processing, the operator twists the push nut 211 outward and pushes the long adjusting rod 22 outward. At this time, the positioning seat 23 releases the workpiece synchronously.

[0052] During the actual processing, in order to improve the positioning and clamping efficiency, arc-shaped grooves 231 are opened on the side walls facing each other of the positioning seat 23. The shape and size of the arc-shaped grooves 231 are adapted to the lower shaft body of the eccentric shaft blank. In this way, the clamping surface is increased, thereby improving the stability of the clamping positioning.

[0053] Example 2

[0054] like Figure 1-6 As shown, based on the structure of Example 1, the top of the above-mentioned discharge trough is fixedly connected to a limiting cylinder seat 4 for limiting the eccentric shaft blank (the upper shaft body of the blank is limited by the limiting cylinder seat 4, so its size is larger than the discharge trough), and the upper end of the eccentric shaft blank is limited in the limiting cylinder seat 4.

[0055] At the same time, in order to position the upper end of the eccentric shaft blank and further improve stability, the top of the above-mentioned limiting cylinder seat 4 is fixedly connected with a top annular plate 41, and a plurality of pressing plates 3 for pressing the eccentric shaft blank are fixedly assembled and connected to the top annular plate 41.

[0056] The pressing plate 3 is used to press one side of the top of the eccentric shaft (during the processing, the other side of the top of the eccentric shaft needs to be grooved).

[0057] Specifically, the pressing plate 3 includes a longitudinal sliding screw 31 fixed on the top annular plate 41 ; a pressing plate 32 is slidably connected to the longitudinal sliding screw 31 , and a pressing nut 311 for pressing the pressing plate 32 is threadedly connected to the longitudinal sliding screw 31 .

[0058] During the working process, the operator adjusts the pressing nut 311 downward through the tool, and the pressing nut 311 pushes the pressing plate 32 to press the material on one side of the upper shaft body of the eccentric shaft blank. Then, the workpiece is positioned by the downward pressing method. In cooperation with the positioning seat 23 from the lower end positioning method, the eccentric shaft is fully positioned in an upper and lower classification method according to the shape characteristics of the eccentric shaft.

[0059] Example 3

[0060] like Figure 1-6 As shown, based on the structure of Example 1, a spring 33 is sleeved on the longitudinal sliding screw 31, and the top and bottom of the spring 33 are fixedly connected to the bottom of the pressing plate 32 and the top position of the top annular plate. After processing, the pressing nut is loosened upwards, and the pressing plate 32 is quickly reset under the elastic restoring force of the spring 33, and the workpiece is released, which is convenient for material removal.

[0061] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. An eccentric shaft workpiece processing fixture, characterized in that: It includes a tooling base, and a plurality of material discharge troughs are provided on the top of the tooling base; The eccentric shaft workpiece processing fixture also includes a positioning mechanism for positioning the workpiece; The positioning mechanism comprises long adjustment rods symmetrically arranged on both sides, and the tooling base is provided with a long adjustment cavity corresponding to the long adjustment rods; The positioning mechanism also includes a plurality of positioning seats fixedly connected to the side walls of the long adjustment rod facing each other, and the positioning seats are located in the discharge trough; The positioning seat is fixedly connected to the long adjustment rod through a short sliding rod, and the short sliding rod is slidably connected to the tooling base; The two ends of the long adjustment rod are respectively slidably connected with long screw rods; the long screw rods are threadedly connected with pushing nuts for pushing the long adjustment rods to move closer to each other; When the long adjustment rods are approaching each other, the positioning seat is clamped to the lower end of the eccentric shaft blank; The long screw is fixedly connected to the tooling base.

2. The eccentric shaft workpiece processing fixture according to claim 1 is characterized in that: The top of the tooling base is provided with two rows of material troughs; each row is provided with a number of equidistant material troughs in the front and rear directions; The eccentric shaft workpiece processing fixture comprises a positioning mechanism symmetrically arranged on left and right sides for positioning the workpiece.

3. The eccentric shaft workpiece processing fixture according to claim 1 is characterized in that: The front and rear ends of the long adjustment rod are respectively fixedly connected with a slide seat located outside the long adjustment cavity; The sliding seat is slidably connected to the long screw rod.

4. The eccentric shaft workpiece processing fixture according to claim 1 is characterized in that: End fixing plates fixedly connected to the long screw rod are respectively welded on the front and rear side walls of the tooling base.

5. The eccentric shaft workpiece processing fixture according to claim 1 is characterized in that: A through hole communicating with the material discharge trough and the long adjustment cavity is provided in the tooling base, and the short sliding rod is slidably connected to the through hole.

6. The eccentric shaft workpiece processing fixture according to claim 1, characterized in that: The top of the material discharge trough is fixedly connected to a limiting cylinder seat for limiting the position of the eccentric shaft blank, and the upper end of the eccentric shaft blank is limited in the limiting cylinder seat.

7. The eccentric shaft workpiece processing fixture according to claim 6, characterized in that: A top annular plate is fixedly connected to the top of the position limiting cylinder seat, and a plurality of pressing plate members for pressing the eccentric shaft blank are fixedly assembled and connected to the top annular plate.

8. The eccentric shaft workpiece processing fixture according to claim 7, characterized in that: The press plate member comprises a longitudinal sliding screw fixed on the top annular plate; A pressing plate is slidably connected to the longitudinal sliding screw, and a pressing nut for pressing the pressing plate is threadedly connected to the longitudinal sliding screw.

9. The eccentric shaft workpiece processing fixture according to claim 8, characterized in that: A spring is sleeved on the longitudinal sliding screw, and the top and bottom of the spring are fixedly connected to the bottom of the pressure plate and the top of the top annular plate.

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