Tractor four-cylinder engine cylinder body positioning clamp

Abstract

The utility model provides a positioning fixture for a four-cylinder engine cylinder body of a tractor. The positioning fixture comprises a fixture body, a positioning element and a clamping assembly, the positioning element comprises a plurality of lower supporting pieces installed on the bottom face of the clamp body, an upper positioning plate and a lower positioning plate, wherein the upper positioning plate and the lower positioning plate are arranged on the side face of the clamp body at intervals. The lower supporting pieces abut against the four corners of the lower end correspondingly. The upper positioning plate and the lower positioning plate abut against the side end face, a plurality of positioning seats are arranged between the upper positioning plate and the lower positioning plate at intervals in the vertical direction, and U-shaped positioning grooves are formed in the ends, close to the engine cylinder body, of the positioning seats and used for positioning the connecting seats. The clamping assembly comprises a plurality of first pressing pieces which are arranged on the upper side of the upper positioning plate at intervals in the linear direction, and the first pressing pieces are pressed at the turning parts; the positioning clamp for the four-cylinder engine cylinder body of the tractor can be matched with the four-cylinder engine cylinder body, positioning is accurate, clamping is reliable, and a workpiece is convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the field of cylinder block jigs, in particular to a positioning jig for a four-cylinder engine cylinder block of a tractor. Background Art

[0002] As an important agricultural machinery and industrial power equipment, the cylinder block of a tractor is one of the key components of the engine. With the development of technology, the requirements for the performance of tractors are constantly increasing, and existing tractors generally use four-cylinder engines.

[0003] Refer to Figure 1 and Figure 2 , the existing four-cylinder engine cylinder block 4 has a lower end portion 401 and a side end face 402. A first convex seat 403 is provided on one side of the lower end portion 401, a second convex seat 404 is provided on the other side, and a screw hole convex seat 405 is provided between the first convex seat 403 and the second convex seat 404; two positioning holes 406 are arranged at intervals in the upper part of the side end face 402, and a plurality of connecting seats 407 are installed at intervals along a straight line in the middle of the side end face 402. A turning portion 408 is provided at the upper end of the engine cylinder block 4; the structure of the existing four-cylinder engine cylinder block is relatively complex, and traditional cylinder block jigs can no longer be adapted, which affects processing and manufacturing. It is necessary to design a new cylinder block jig to meet the processing requirements. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] The problem to be solved by the utility model is to provide a positioning jig for a four-cylinder engine cylinder block of a tractor, which can be adapted to the four-cylinder engine cylinder block, has accurate positioning, reliable clamping, and is convenient for workpiece disassembly and assembly.

[0006] (2) Technical Solutions

[0007] To solve the above technical problems, the utility model provides a positioning jig for a four-cylinder engine cylinder block of a tractor, including:

[0008] A jig body;

[0009] Positioning elements for positioning the engine cylinder block, including a plurality of lower support members installed on the bottom surface of the jig body and upper positioning plates and lower positioning plates arranged at intervals on the side surface of the jig body. The plurality of lower support members correspondingly abut against the four corners of the lower end portion; the upper positioning plates and the lower positioning plates abut against the side end face, and a plurality of positioning seats are arranged at intervals in the vertical direction between the upper positioning plates and the lower positioning plates. A U-shaped positioning groove is provided at one end of the positioning seat close to the engine cylinder block, and the U-shaped positioning groove is used for positioning the connecting seat;

[0010] The clamping assembly is used to clamp the engine block and includes a plurality of first pressing members spaced apart in a straight line direction on the upper side of the upper positioning plate, and the first pressing members are pressed at the turning portions.

[0011] In some embodiments, the positioning element further includes a first positioning pin and a second positioning pin fixed to the side surface of the jig body. The first positioning pin and the second positioning pin are arranged at intervals, and the first positioning pin and the second positioning pin are inserted into corresponding positioning holes. The upper positioning plate includes a left positioning plate and a right positioning plate arranged at intervals. The first positioning pin is located between the left positioning plate and the right positioning plate, and the second positioning pin is located on one side of the left positioning plate.

[0012] In some embodiments, a support column is provided on one side of the second positioning pin, and the support column abuts against the side end surface.

[0013] In some embodiments, the positioning seat is T-shaped, and a flared opening is provided at the outer end of the U-shaped positioning groove.

[0014] In some embodiments, the clamping assembly further includes a second pressing member and a third pressing member spaced apart on the bottom surface of the jig body. The second pressing member is pressed at the first convex seat, and the third pressing member is pressed at the second convex seat. The clamping assembly further includes a fourth pressing member provided on the bottom surface of the jig body. The fourth pressing member is located between the second pressing member and the third pressing member, and the fourth pressing member is pressed at the screw hole convex seat.

[0015] In some embodiments, the lower support member is a support oil cylinder, and a top head abutting against the lower end portion is provided at the upper end of the support oil cylinder.

[0016] In some embodiments, the first pressing member, the second pressing member, the third pressing member, and the fourth pressing member are all lever oil cylinders, and each includes an oil cylinder body, a connecting rod, and a pressing block for pressing the engine block. The pressing block is hinged to the telescopic rod of the oil cylinder body, and the connecting rod is connected between the pressing block and the oil cylinder body.

[0017] In some embodiments, the jig body includes a bottom plate and a side plate arranged perpendicular to each other, and a reinforcing rib plate is installed between the bottom plate and the side plate; the lower support member is installed on the bottom plate, and the upper positioning plate, the lower positioning plate, the positioning seat, and the first pressing member are installed on the side plate.

[0018] (III) Beneficial effects

[0019] A positioning fixture for the cylinder block of a tractor four-cylinder engine provided by the present utility model can position the cylinder block of the four-cylinder engine. The positioning elements cooperate through the lower support member, the upper positioning plate, the lower positioning plate, the positioning seat, the first positioning pin and the second positioning pin, and can accurately position the engine cylinder block with good positioning effect. Through accurate positioning, the processing accuracy of the product is greatly improved; the clamping assembly cooperates through the first pressing member, the second pressing member, the third pressing member and the fourth pressing member, and can reliably clamp the engine cylinder block, with firm and stable clamping, preventing the workpiece from moving during processing and improving the processing accuracy; all four pressing members adopt lever cylinders, which are convenient for controlling clamping and loosening, convenient for installing the engine cylinder block, and convenient for disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is a three-dimensional view of an existing four-cylinder engine cylinder block;

[0022] Figure 2 is a three-dimensional view of the existing four-cylinder engine cylinder block from another perspective;

[0023] Figure 3 is a three-dimensional view of the present utility model's positioning fixture for the cylinder block of a tractor four-cylinder engine after the engine cylinder block is installed;

[0024] Figure 4 is a structural schematic diagram of the present utility model's positioning fixture for the cylinder block of a tractor four-cylinder engine after the engine cylinder block is installed;

[0025] Figure 5 is a structural schematic diagram of the present utility model's positioning fixture for the cylinder block of a tractor four-cylinder engine from another perspective after the engine cylinder block is installed;

[0026] Figure 6 is a three-dimensional view of the present utility model's positioning fixture for the cylinder block of a tractor four-cylinder engine;

[0027] Figure 7 is a structural schematic diagram of the side plate of the present utility model's positioning fixture for the cylinder block of a tractor four-cylinder engine;

[0028] Figure 8 is a structural schematic diagram of the bottom plate of the present utility model's positioning fixture for the cylinder block of a tractor four-cylinder engine;

[0029] Figure 9Stereogram of the connection between the engine block and the positioning seat of a four-cylinder engine block positioning fixture for a tractor according to the present utility model;

[0030] Figure 10 Stereogram of the positioning seat of a four-cylinder engine block positioning fixture for a tractor according to the present utility model;

[0031] Figure 11 Stereogram of the first pressing member of a four-cylinder engine block positioning fixture for a tractor according to the present utility model;

[0032] The corresponding component names for each reference numeral in the figure are: 1, fixture body; 11, base plate; 12, side plate; 21, lower support member; 211, top head; 22, upper positioning plate; 221, left positioning plate; 222, right positioning plate; 23, lower positioning plate; 24, positioning seat; 241, U-shaped positioning groove; 242, flared opening; 25, first positioning pin; 26, second positioning pin; 27, support column; 31, first pressing member; 311, oil cylinder body; 312, connecting rod; 313, pressing block; 32, second pressing member; 33, third pressing member; 34, fourth pressing member; 4, engine block; 401, lower end portion; 402, side end face; 403, first convex seat; 404, second convex seat; 405, threaded hole convex seat; 406, positioning hole; 407, connecting seat; 408, turning portion. Detailed implementation manners

[0033] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] The following illustrates the implementation manners of the present application through specific examples. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of them. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0035] It should be noted that the following description relates to various aspects of embodiments within the scope of the appended claims. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects described herein can be used to implement a device and / or practice a method. Additionally, this device can be implemented and this method can be practiced using other structures and / or functions in addition to one or more of the aspects described herein.

[0036] It should also be noted that the diagrams provided in the following embodiments only illustrate the basic concept of this application schematically. Only the components related to this application are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and proportion of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0037] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that these examples can be practiced without these specific details.

[0038] The following describes the technical solutions provided by each embodiment of this application in conjunction with the accompanying drawings.

[0039] Refer to Figures 3 to 11 , the present utility model provides a positioning fixture for a four-cylinder engine block of a tractor, including a fixture body 1 and positioning elements and clamping components provided on the fixture body 1.

[0040] Refer to Figures 3 to 6 , the positioning elements are used to position the engine block 4. The positioning elements include four lower support members 21 mounted on the bottom surface of the fixture body 1 and an upper positioning plate 22 and a lower positioning plate 23 arranged at intervals on the side surface of the fixture body 1. The four lower support members 21 correspondingly abut against the four corners of the lower end portion 401, with good positioning effect. The upper positioning plate 22 and the lower positioning plate 23 are arranged in parallel, and the upper positioning plate 22 is located above the lower positioning plate 23. The upper positioning plate 22 and the lower positioning plate 23 abut against the side end surface 402. A plurality of positioning seats 24 are arranged at intervals in the vertical direction between the upper positioning plate 22 and the lower positioning plate 23. In this embodiment, there are two positioning seats 24. The end of the positioning seat 24 close to the engine block 4 is provided with a U-shaped positioning groove 241, and the U-shaped positioning groove 241 is used to position the connecting seat 407, and the connecting seat 407 is placed in the U-shaped positioning groove 241.

[0041] Refer to Figures 3 to 6, the clamping assembly is used to clamp the engine block 4. The clamping assembly includes a plurality of first pressing members 31 that are arranged at intervals in a straight line on the upper side of the upper positioning plate 22. The first pressing members 31 are installed on the side surface of the fixture body 1, and the first pressing members 31 press against the turning portion 408.

[0042] In some embodiments, such as Figure 6 and Figure 7 shown, the positioning element further includes a first positioning pin 25 and a second positioning pin 26 fixed to the side surface of the fixture body 1. The first positioning pin 25 and the second positioning pin 26 are arranged at intervals and correspond to two positioning holes 406. The first positioning pin 25, the second positioning pin 26 are inserted into the corresponding positioning holes 406. Among them, the upper positioning plate 22 adopts a split design, which is convenient for manufacturing. The upper positioning plate 22 includes a left positioning plate 221 and a right positioning plate 222 that are arranged at intervals. The first positioning pin 25 is located between the left positioning plate 221 and the right positioning plate 222, and the second positioning pin 26 is located on one side of the left positioning plate 221. With this structure, the positioning element can accurately position the engine block through the cooperation of the lower support member, the upper positioning plate, the lower positioning plate, the positioning seat, the first positioning pin and the second positioning pin, and the positioning effect is good. Through accurate positioning, the processing accuracy of the product is greatly improved.

[0043] In some embodiments, such as Figure 6 and Figure 7 shown, a support column 27 is provided on one side of the second positioning pin 26, and the support column 27 abuts against the side end face 402. With this structure, the setting of the support column 27 can increase the contact area between the fixture and the side end face 402, and the support effect is better.

[0044] In some embodiments, such as Figure 9 and Figure 10 shown, the positioning seat 24 is in a T shape, and a flared opening 242 is provided at the outer end of the U-shaped positioning groove 241. With this structure, the flared opening 242 facilitates the insertion of the connecting seat 407, and the installation is more convenient.

[0045] In some embodiments, such as Figure 6 and Figure 8As shown, the clamping assembly further includes a second pressing member 32 and a third pressing member 33 that are spaced apart and disposed on the bottom surface of the fixture body 1. The second pressing member 32 presses against the first convex seat 403, and the third pressing member 33 presses against the second convex seat 404. The clamping assembly further includes a fourth pressing member 34 disposed on the bottom surface of the fixture body 1. The fourth pressing member 34 is located between the second pressing member 32 and the third pressing member 33, and the fourth pressing member 34 presses against the screw hole convex seat 405. With this structure, through the cooperation of the first pressing member, the second pressing member, the third pressing member, and the fourth pressing member, the engine block can be reliably clamped, firmly and stably, preventing the workpiece from moving during machining and improving the machining accuracy. All four pressing members use lever cylinders, which are convenient for controlling clamping and loosening, facilitating the installation of the engine block and making disassembly and assembly convenient.

[0046] In some embodiments, as Figure 6 shown, the lower support member 21 is a support cylinder, and the upper end of the support cylinder is provided with a top head 211 that abuts against the lower end portion 401.

[0047] In some embodiments, as Figure 6 and Figure 11 shown, the first pressing member 31, the second pressing member 32, the third pressing member 33, and the fourth pressing member 34 are all lever cylinders, and each includes a cylinder body 311, a connecting rod 312, and a pressing block 313 for pressing the engine block 4. The pressing block 313 is hinged to the telescopic rod of the cylinder body 311, and the connecting rod 312 is connected between the pressing block 313 and the cylinder body 311.

[0048] In some embodiments, as Figures 6 to 8 shown, the fixture body 1 includes a bottom plate 11 and a side plate 12 that are arranged perpendicular to each other. A reinforcing rib plate is installed between the bottom plate 11 and the side plate 12 to ensure the connection strength. The lower support member 21, the second pressing member 32, the third pressing member 33, and the fourth pressing member 34 are all installed on the bottom plate 11, and the upper positioning plate 22, the lower positioning plate 23, the positioning seat 24, and the first pressing member 31 are all installed on the side plate 12.

[0049] For the same and similar parts among the various embodiments in this specification, reference can be made to each other. Each embodiment focuses on the differences from other embodiments.

[0050] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A positioning fixture for the cylinder block of a tractor four-cylinder engine, characterized in that, Comprising: Jig body (1); Positioning elements for positioning the engine block (4), including a plurality of lower support members (21) mounted on the bottom surface of the jig body (1) and upper positioning plates (22) and lower positioning plates (23) spaced apart on the side surface of the jig body (1). A plurality of lower support members (21) correspondingly abut against the four corners of the lower end portion (401); the upper positioning plate (22) and the lower positioning plate (23) abut against the side end surface (402). A plurality of positioning seats (24) are spaced apart in the vertical direction between the upper positioning plate (22) and the lower positioning plate (23). One end of the positioning seat (24) close to the engine block (4) is provided with a U-shaped positioning groove (241) for positioning the connecting seat (407); the positioning elements further include a first positioning pin (25) and a second positioning pin (26) fixed on the side surface of the jig body (1). The first positioning pin (25) and the second positioning pin (26) are arranged at intervals. The first positioning pin (25) and the second positioning pin (26) are inserted into corresponding positioning holes (406). Clamping assembly for clamping the engine block (4), including a plurality of first pressing members (31) spaced apart in a straight line direction on the upper side of the upper positioning plate (22). The first pressing member (31) presses against the turning portion (408).

2. The positioning fixture for the cylinder block of a tractor four-cylinder engine according to claim 1, characterized in that: The upper positioning plate (22) includes a left positioning plate (221) and a right positioning plate (222) arranged at intervals.

3. The positioning fixture for the cylinder block of a tractor four-cylinder engine according to claim 2, characterized in that: The first positioning pin (25) is located between the left positioning plate (221) and the right positioning plate (222), and the second positioning pin (26) is located on one side of the left positioning plate (221).

4. The positioning fixture for the cylinder block of a tractor four-cylinder engine according to claim 1, characterized in that: A support column (27) is provided on one side of the second positioning pin (26), and the support column (27) abuts against the side end surface (402).

5. The positioning fixture for the cylinder block of a tractor four-cylinder engine according to claim 1, characterized in that: The positioning seat (24) is T-shaped, and a flared opening (242) is provided at the outer end of the U-shaped positioning groove (241).

6. The positioning fixture for the cylinder block of a tractor four-cylinder engine according to claim 1, characterized in that: The clamping assembly further includes a second pressing member (32) and a third pressing member (33) spaced apart on the bottom surface of the jig body (1). The second pressing member (32) presses against the first convex seat (403), and the third pressing member (33) presses against the second convex seat (404).

7. The positioning fixture for the cylinder block of a tractor four-cylinder engine according to claim 6, characterized in that: The clamping assembly further includes a fourth pressing member (34) provided on the bottom surface of the jig body (1). The fourth pressing member (34) is located between the second pressing member (32) and the third pressing member (33), and the fourth pressing member (34) presses against the screw hole convex seat (405).

8. The positioning fixture for the cylinder block of a tractor four-cylinder engine according to claim 1, wherein: The lower support member (21) is a support oil cylinder, and a top head (211) abutting against the lower end portion (401) is provided at the upper end of the support oil cylinder.

9. The positioning fixture for the cylinder block of a tractor four-cylinder engine according to claim 7, characterized in that: The first pressing member (31), the second pressing member (32), the third pressing member (33) and the fourth pressing member (34) are all lever cylinders, and each includes a cylinder body (311), a connecting rod (312) and a pressing block (313) for pressing the engine block (4). The pressing block (313) is hinged to the telescopic rod of the cylinder body (311), and the connecting rod (312) is connected between the pressing block (313) and the cylinder body (311).

10. The positioning fixture for the cylinder block of a tractor four-cylinder engine according to claim 1, characterized in that: The fixture body (1) includes a bottom plate (11) and a side plate (12) arranged perpendicular to each other, and a reinforcing rib plate is installed between the bottom plate (11) and the side plate (12); the lower support member (21) is installed on the bottom plate (11), and the upper positioning plate (22), the lower positioning plate (23), the positioning seat (24) and the first pressing member (31) are installed on the side plate (12).

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