Engineering machinery clutch release fork arm machining vehicle clamp

Abstract

The utility model discloses an engineering machinery clutch release fork arm machining lathe clamp which comprises a fixing plate, the fixing plate is a circular plate, a process through hole is formed in the center of the upper end face of the fixing plate, a positioning pin is arranged on the upper end face of the fixing plate, and the positioning pin is provided with a positioning step. Two limiting blocks are arranged on the periphery of the process through hole in the upper end face of the fixing plate, the end faces, close to the process through hole, of the limiting blocks are cylindrical faces, the cylindrical faces are concentric with the process through hole, and the two limiting blocks are distributed on the two sides of the connecting line of the circle center of the process through hole and the circle center of the positioning pin; and a pressing mechanism is arranged between the process through hole and the positioning pin on the upper end surface of the fixing plate. According to the utility model, the processing technology of the clutch release yoke is technically innovated, batch processing can be met, and the processing precision can meet the dimensional tolerance precision requirement.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, specifically to a clamping fixture for processing clutch release forks in engineering machinery. Background Technology

[0002] During processing Figure 1 When operating the clutch release fork as shown, the upper end face A of the second cylinder and the upper end face B of the first cylinder are generally used as rough datums. The lower end face C of the second cylinder and the lower end face D of the first cylinder are then machined using milling or planing. Next, the first circular hole F is drilled and reamed using a drilling machine. Finally, using the lower end face C of the second cylinder and the lower end face D of the first cylinder as fine datums, the workpiece is held in the four-jaw chuck of a lathe. A dial indicator is mounted on a magnetic base and attached to the lathe carriage or tool post. The dial indicator is used to repeatedly align and adjust the outer wall G of the second cylinder until its center is coaxial with the four-jaw chuck to the required standard. Then, the chuck jaws are clamped, and the second circular hole E and the upper end faces A and B of the second and first cylinders are machined to ensure dimensional accuracy. This alignment process is relatively complicated, and the dimensional accuracy of the center distance between the first circular hole F and the second circular hole E is difficult to guarantee, resulting in low production efficiency. Improving machining accuracy and increasing efficiency while reducing costs remains a major challenge. Utility Model Content

[0003] In view of the above-mentioned defects in the existing technology, the purpose of this utility model is to provide a machining fixture for the clutch release fork arm of engineering machinery, so as to solve the current situation of large production batch and low machining accuracy.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A machining fixture for a clutch release fork arm in engineering machinery includes a fixed plate, which is a circular plate. A process through hole is located at the center of the upper end face of the fixed plate. A positioning pin is located on the upper end face of the fixed plate, and the positioning pin has a positioning step. Two limiting blocks are located on the outer periphery of the process through hole on the upper end face of the fixed plate. The end face of the limiting blocks near the process through hole is a cylindrical surface, concentric with the process through hole. The two limiting blocks are distributed on both sides of the line connecting the center of the process through hole and the center of the positioning pin. A clamping mechanism is provided between the process through hole and the positioning pin on the upper end face of the fixed plate. The positioning pin is used for positioning the first circular hole and the lower end face of the first cylinder of the clutch release fork arm. The cylindrical surface is used for positioning the outer wall of the second cylinder of the clutch release fork arm. The upper end face of the fixed plate is positioned with the lower end face of the second cylinder of the clutch release fork arm.

[0006] Furthermore, a limiting block is connected to the fixing plate by two screws.

[0007] Furthermore, the clamping mechanism includes a pressure plate, with a rotating shaft end and a movable end at both ends;

[0008] Specifically, the rotating shaft end is rotatably connected with the fixed plate through a bolt, a second pin sleeve and a fixed plate, the fixed plate is provided with a second mounting hole in an upper end surface, the rotating shaft end is provided with a rotating hole, the second pin sleeve is located between the second mounting hole and the rotating hole, and a screw rod of the bolt is screwed into the second mounting hole after penetrating through the rotating hole and the second pin sleeve;

[0009] Specifically, the movable end is connected with the fixed plate through a fixed wire shaft, a first pin sleeve and a nut, the fixed plate is provided with a third mounting hole in an upper end surface, the movable end is provided with a lateral opening, the fixed wire shaft is screwed into the third mounting hole, the first pin sleeve and the nut are arranged on the fixed wire shaft, the first pin sleeve is located between the fixed plate and the nut, and the lateral opening can be clamped with the fixed wire shaft to clamp the pressing plate between the first pin sleeve and the nut.

[0010] Further, flat washers are arranged between the bolt and the pressing plate and between the nut and the pressing plate.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model discloses a clutch separating fork arm machining process and can meet batch processing, and the machining precision can meet the size tolerance precision requirement. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structure diagram of separating fork arm machining car clamp Figure 1 .

[0014] Figure 2 It is the structure diagram of separating fork arm machining car clamp Figure 2 .

[0015] Figure 3 It is the structure diagram of separating fork arm machining car clamp of the utility model engineering machinery clutch Figure 1 .

[0016] Figure 4 It is the structure diagram of separating fork arm machining car clamp of the utility model engineering machinery clutch Figure 2 .

[0017] Figure 5 It is the structure diagram of separating fork arm machining car clamp of the utility model engineering machinery clutch Figure 3 .

[0018] Figure 6 It is the structure diagram of the utility model and clutch separating fork arm after assembly Figure 1 .

[0019] Figure 7 It is the structure diagram of the utility model and clutch separating fork arm after assembly Figure 2 .

[0020] Figure 8 Figure 2 is a structure diagram of the clutch separation fork arm assembled by the utility model Figure 3 .

[0021] In the figure: 1, fixed plate; 2, limiting block; 3, pressing plate; 4, fixed silk shaft; 5, positioning pin; 6, inner hexagonal screw; 71, first pin sleeve; 72, second pin sleeve; 8, flat washer; 9, nut; 10, bolt; 11, process through hole; 12, clutch separation fork arm; A, second cylindrical upper end face; B, first cylindrical upper end face; C, second cylindrical lower end face; D, first cylindrical lower end face; E, second circular hole; F, first circular hole; G, second cylindrical outer wall; H, transverse cylindrical protrusion. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] Please refer to Figures 1 to 8 The engineering machinery clutch separation fork arm machining vehicle clamp provided by the utility model comprises a fixed plate 1, the fixed plate 1 is a round plate, a process through hole 11 is arranged at the center of the upper end face of the fixed plate 1, a positioning pin 5 is arranged on the upper end face of the fixed plate 1, two limiting blocks 2 are arranged on the outer periphery of the fixed plate 1 at the process through hole 11, the end face of the limiting block 2 close to the process through hole 11 is a cylindrical surface, the cylindrical surface is concentric with the process through hole 11, the two limiting blocks 2 are distributed on the two sides of the line connecting the center of the process through hole 11 with the center of the positioning pin 5, the positioning pin 5 is provided with a positioning step, and a pressing mechanism is arranged between the process through hole 11 and the positioning pin 5 on the upper end face of the fixed plate 1.

[0024] The positioning pin 5 is used for positioning the first circular hole F and the first cylindrical lower end face D of the clutch separation fork arm 12, the cylindrical surface is used for positioning the second cylindrical outer wall G of the clutch separation fork arm 12, and the upper end face of the fixed plate 1 is positioned with the second cylindrical lower end face C of the clutch separation fork arm 12.

[0025] The size of the process through hole 11 is greater than the size of the second circular hole E of the clutch separation fork arm 12, so that the machining is facilitated.

[0026] The two limiting blocks 2 facilitate avoiding interference with the transverse cylindrical protrusion H of the clutch separation fork arm 12.

[0027] The upper end face of the fixed plate 1 is a finish surface, so that accurate positioning is realized.

[0028] Specifically, the fixed plate 1 is provided with a first mounting hole, the lower end of the positioning pin 5 is provided with a mounting rod and is connected with the first mounting hole in interference, and is directly positioned through the shoulder between the mounting rod and the pin body.

[0029] Specifically, one limiting block 2 is connected with the fixed plate 1 through two inner hexagonal screws 6.

[0030] Further, the pressing mechanism comprises a pressing plate 3, both ends of the pressing plate 3 are respectively a rotating shaft end and a movable end; the rotating shaft end is rotationally connected with the fixed plate 1 through a bolt 10 and a second pin sleeve 72, the fixed plate 1 is provided with a second mounting hole on the upper end surface, the rotating shaft end is provided with a rotating hole, the second pin sleeve 72 is located between the second mounting hole and the rotating hole, and the screw rod of the bolt 10 passes through the rotating hole and the second pin sleeve 72 and is threadedly connected with the second mounting hole; the movable end is connected with the fixed plate 1 through a fixed wire shaft 4, a first pin sleeve 71 and a nut 9, the fixed plate 1 is provided with a third mounting hole on the upper end surface, the movable end is provided with a lateral opening, the third mounting hole is threadedly connected with the fixed wire shaft 4, the fixed wire shaft 4 is provided with the first pin sleeve 71 and the nut 9, the first pin sleeve 71 is located between the fixed plate 1 and the nut 9, and the lateral opening can be clamped with the fixed wire shaft 4, so that the pressing plate 3 is clamped between the first pin sleeve 71 and the nut 9, the movable end is locked by locking the nut 9, and then the pressing plate 3 is fixed, and the arm rod of the clutch release yoke 12 is pressed.

[0031] Specifically, the second mounting hole is positioned by the bolt 10, and the third mounting hole is positioned by the fixed wire shaft 4.

[0032] Specifically, flat washers 8 are arranged between the bolt 10 and the pressing plate 3 and between the nut 9 and the pressing plate.

[0033] In use, the first two processes remain unchanged compared with the original, the last two processes take the lower end surface C of the second cylinder and the lower end surface D of the first cylinder as the machining precision reference, take the first circular hole F as the precision positioning reference, and take the outer wall G of the second cylinder as the rough reference, directly cooperate the clutch release yoke 12 with the positioning pin 5 and the two limiting blocks 2, do not need to find the correct position to adjust the clutch release yoke 12, and can directly process, completely guarantee the center distance of the first circular hole F and the second circular hole E and the hole diameter size of the second circular hole E.

[0034] The set of lathe fixtures only need to clamp and fix the outer circle of the fixed plate 1 by using a three-jaw chuck, facilitate the lathe processing of the tool, after the two limiting blocks 2 are assembled, are used for positioning the blank, facilitate the positioning and taking and placing of the clutch release yoke 12, and the pressing plate 3 is used for clamping the clutch release yoke 12, when the clutch release yoke is processed, the nut 9 is loosened, the pressing plate 3 is removed, and the clutch release yoke 12 can be quickly taken out.

[0035] This car clamp can ensure the machining precision of clutch disconnecting fork arm 12, and the production capacity is several times higher than that of the original.

[0036] In the present application, the parts not discussed in detail, the connection mode of each part in the present application, are all known in the art. Direct application can be used, and will not be repeated.

[0037] In the present application, the term "a plurality of" refers to two or more, unless otherwise specified. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, "connecting" can be fixed connection, or detachable connection, or integral connection; "connected" can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0039] In the description of the present application, the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A fixture for processing an arm of a separating fork of a clutch of a construction machine, comprising a fixed plate, the fixed plate being a circular plate, a process through hole being provided at the center of an upper end surface of the fixed plate, characterized in that, The upper end surface of the fixed plate is provided with a positioning pin, and the positioning pin is provided with a positioning step; Two limiting blocks are arranged on the outer periphery of the process through hole on the upper end surface of the fixed plate, the end surface of the limiting block close to the process through hole is a cylindrical surface, the cylindrical surface is concentric with the process through hole, and the two limiting blocks are distributed on both sides of the line connecting the center of the process through hole and the center of the positioning pin; A pressing mechanism is arranged between the process through hole and the positioning pin on the upper end surface of the fixed plate; The positioning pin is used for positioning the first circular hole and the lower end surface of the first cylinder of the clutch separation fork arm, the cylindrical surface is used for positioning the second cylindrical outer wall of the clutch separation fork arm, and the upper end surface of the fixed plate is positioned with the lower end surface of the second cylinder of the clutch separation fork arm.

2. The construction machine clutch fork arm machining fixture of claim 1, wherein, One limiting block is connected with the fixed plate by two screws.

3. The construction machine clutch fork arm machining fixture of claim 1, wherein, The pressing mechanism comprises a pressing plate, and the two ends of the pressing plate are a rotating shaft end and a movable end respectively; The rotating shaft end is rotationally connected with the fixed plate through a bolt and a second pin sleeve, the fixed plate is provided with a second mounting hole on the upper end surface, the rotating shaft end is provided with a rotating hole, the second pin sleeve is located between the second mounting hole and the rotating hole, and the shank of the bolt passes through the rotating hole, the second pin sleeve and is then threadedly connected with the second mounting hole; The movable end is connected with the fixed plate through a fixed wire shaft, a first pin sleeve and a nut, the upper end surface of the fixed plate is provided with a third mounting hole, the movable end is provided with a lateral opening, the fixed wire shaft is threadedly connected in the third mounting hole, the first pin sleeve and the nut are arranged on the fixed wire shaft, the first pin sleeve is located between the fixed plate and the nut, and the lateral opening can be clamped with the fixed wire shaft to clamp the pressing plate between the first pin sleeve and the nut.

4. The construction machine clutch fork arm machining fixture of claim 3, wherein, Flat washers are arranged between the bolt and the pressing plate and between the nut and the pressing plate.

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