A V-type cylinder block bore honing fixture

Abstract

The invention discloses a V-type cylinder block cylinder bore honing fixture, which belongs to the honing fixture, and solves the problems of inconvenient operation and low production efficiency of the existing V-type cylinder block cylinder bore honing fixture; the fixture comprises a base, and the two ends of the base are respectively provided with a left positioning support and a right positioning support, the left positioning support is provided with a left spindle hole positioning pin, the right positioning support is provided with a right spindle hole positioning pin, one side of the left positioning support is provided with a driving mechanism that can drive the left spindle hole positioning pin to move, a tray for placing the V-type cylinder block is movably sleeved between the left spindle hole positioning pin and the right spindle hole positioning pin, a locking structure that can make the same group of cylinder holes on the V-type cylinder block face upward is provided between the tray and the right positioning support, and a positioning device for supporting the V-type cylinder block is provided on the base. The invention can realize the honing processing of two groups of cylinder holes on the V-type cylinder block in one hoisting, thereby improving the production efficiency and greatly reducing the labor intensity of the workers.

Description

Technical Field

[0001] The invention relates to a cylinder bore honing fixture, and more specifically, to a V-type cylinder block cylinder bore honing fixture. Background Art

[0002] The cylinder block of a V-type engine is to divide all cylinder holes into two groups, and arrange the adjacent cylinder holes with a certain fixture so that the centers of the two groups of cylinder holes form two planes with an angle of α. When viewed from the end face, the cylinder holes are V-shaped. The cylinder block of a V-type engine has high precision requirements for the roundness, cylindricity, and roughness of the cylinder holes. The surface of the cylinder holes also requires a certain cross-netting. The machining accuracy of these key parts will directly affect the performance and service life of the engine. In the dry cylinder hole machining process, in addition to precision boring, the cylinder holes must also be honed.

[0003] The existing honing fixture for the cylinder bore of a V-shaped cylinder block is based on the main shaft holes at the front and rear ends of the cylinder block, the bottom surface of the cylinder block and one end surface. The cylinder block is rotated around the center of the main shaft hole by an angle of α / 2 so that the top surface of the cylinder block faces upwards, and the cylinder bore is honed. The existing honing fixture for the cylinder bore of a V-shaped cylinder block has the following disadvantages:

[0004] 1. As Figure 1 As shown, since the existing V-type cylinder block cylinder bore honing fixture has only one bottom surface positioning block in one direction, and the cylinder bore of the V-type cylinder block has two groups, after honing one group of cylinder bores, the cylinder block needs to be lifted out of the honing fixture, horizontally rotated 180° on the workstation outside the machine tool, and rotated α in the opposite direction around the center of the cylinder block spindle hole, and then honed on the fixture for positioning, and then honing another group of cylinder bores. The existing V-type cylinder block cylinder bore honing fixture is inconvenient to operate, time-consuming and labor-intensive, with high labor intensity and low production efficiency.

[0005] 2. The existing V-type cylinder block cylinder bore honing fixtures have spindle hole locating pins at both ends that use a screw sleeve structure. Due to the space constraints of the machine tool, only six-cylinder V-type cylinder blocks can be processed. When processing eight-cylinder V-type cylinder blocks, the length of the machine tool workbench is insufficient. Summary of the invention

[0006] The purpose of the present invention is to provide a V-type cylinder block cylinder bore honing fixture, by which two groups of cylinder bores on a V-type cylinder block can be honed in one hoisting operation, which is convenient to operate, greatly reduces the labor intensity of workers, and has high production efficiency.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A V-shaped cylinder block cylinder bore honing fixture comprises a base, wherein a left positioning support and a right positioning support are respectively arranged at both ends of the base, the left positioning support is arranged with a left spindle hole positioning pin, the right positioning support is arranged with a right spindle hole positioning pin, one side of the left positioning support is arranged with a driving mechanism capable of driving the left spindle hole positioning pin to move, a tray for placing the V-shaped cylinder block is movably sleeved between the left spindle hole positioning pin and the right spindle hole positioning pin, a locking structure capable of making the same group of cylinder holes on the V-shaped cylinder block face upward is arranged between the tray and the right positioning support, and a positioning device for supporting the V-shaped cylinder block is arranged on the base.

[0009] Furthermore, the locking structure includes a first through hole and a second through hole arranged on the pallet and a pallet directional pin movably inserted into the right positioning support, and the first through hole, the second through hole and the pallet directional pin are all distributed on the same distribution circle with the center of the right spindle hole locating pin as the center.

[0010] Furthermore, a third through hole is arranged on the symmetric center line of the first through hole and the second through hole on the tray, and the third through hole and the first through hole and the second through hole are located on the same distribution circle.

[0011] Furthermore, the two ends of the right positioning support are respectively provided with a first orienting pin guide sleeve and a second orienting pin guide sleeve which are sleeved on the periphery of the pallet orienting pin, the second orienting pin guide sleeve is respectively provided with a first transverse hole, a second transverse hole and a vertical hole connected to the two, the pallet orienting pin is provided with a shoulder, the pallet orienting pin is sleeved with a spring, the two ends of the spring are respectively pressed against the end surfaces of the shoulder and the second orienting pin guide sleeve, and the pallet orienting pin is provided with an orienting pin handle.

[0012] Furthermore, the driving mechanism includes a gear shaft rotatably arranged in the left positioning support and a gear arranged at one end of the gear shaft, a rack meshing with the gear is arranged on the left main shaft hole positioning pin, and the other end of the gear shaft is connected to the first handle shaft through a first crank.

[0013] Furthermore, a limiting groove is provided on the positioning pin of the left spindle hole, and a limiting screw which is clamped in the limiting groove is provided on the left positioning support.

[0014] Furthermore, a screw sleeve is provided at one end of the right positioning support, a screw rod is provided inside the right positioning support, the screw rod and the screw sleeve are connected by a thread, a U-shaped groove is provided at one end of the right spindle hole locating pin, a boss is provided at one end of the screw rod that is clamped in the U-shaped groove, and the other end of the screw rod is connected to the second handle shaft via a second crank.

[0015] Furthermore, the positioning device comprises two tower-shaped inclined platforms arranged on the base, the tower-shaped inclined platforms are provided with a first inclined surface and a second inclined surface which are symmetrically arranged, and the first inclined surface and the second inclined surface are provided with a first positioning block and a second positioning block respectively.

[0016] Furthermore, notches corresponding to the positions of the tower-shaped inclined platform are provided on both sides of the tray.

[0017] Furthermore, side support blocks and pre-positioning blocks for guiding are respectively arranged on both sides of the base, and bottom support blocks for guiding are respectively arranged on both sides of the tray.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) A V-shaped cylinder block cylinder bore honing fixture of the present invention has a tray for placing the V-shaped cylinder block movably mounted between the left spindle hole locating pin and the right spindle hole locating pin, and a locking structure for making the same group of cylinder holes on the V-shaped cylinder block face upward is provided between the tray and the right positioning support. The V-shaped cylinder block can be placed on the fixture through the tray. After the V-shaped cylinder block is hoisted, the tray is flipped to drive the V-shaped cylinder block to flip, and the position of the tray is fixed by the locking structure, and at the same time, the same group of cylinder holes on the V-shaped cylinder block face upward for honing processing.

[0020] (2) A V-type cylinder block cylinder bore honing fixture of the present invention has a first through hole and a second through hole on a pallet, a pallet directional pin movably inserted in a right positioning support, the first through hole, the second through hole and the pallet directional pin are all distributed on the same distribution circle with the center of the right spindle hole directional pin as the center, and the pallet can be fixed in the flipping position by inserting the pallet directional pin into the first through hole and the second through hole respectively, so that the two groups of cylinder bores of the V-type cylinder block are positioned upward, thereby honing the cylinder bores of the V-type cylinder block.

[0021] (3) A V-type cylinder block bore honing fixture of the present invention has a third through hole arranged on the symmetrical center line of the first through hole and the second through hole, and the third through hole and the first through hole and the second through hole are located on the same distribution circle. When the pallet directional pin is inserted into the third through hole, the pallet is in a horizontal position. At this time, the V-type cylinder block can be hoisted onto the pallet, thereby completing the clamping and fixing of the V-type cylinder block.

[0022] (4) A V-type cylinder block cylinder bore honing fixture of the present invention, wherein a driving mechanism includes a gear shaft rotatably arranged in a left positioning support and a gear arranged at one end of the gear shaft, a rack meshing with the gear is arranged on the left main shaft positioning pin, and the other end of the gear shaft is connected to a first handle shaft via a first crankshaft. By rotating the first handle shaft, the left main shaft positioning pin can be driven to move. The gear rack structure saves operating space at the left end, and the cylinder bore honing processing of both six-cylinder and eight-cylinder V-type cylinder blocks can be compatible, thereby saving a set of fixtures and also saving the installation and adjustment time of replacing the fixtures for the conversion processing of two models. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 It is a structural schematic diagram of a clamp in the prior art;

[0025] Figure 2 It is a schematic diagram of the structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the main structure when the present invention is applied;

[0027] Figure 4 It is a schematic diagram of the top view structure when the present invention is applied;

[0028] Figure 5 yes Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0029] Figure 6 is along Figure 3 Schematic diagram of the cross-sectional structure along the middle BB direction;

[0030] Figure 7 is along Figure 3 Schematic diagram of the cross-sectional structure in the CC direction;

[0031] Figure 8 yes Figure 7 Schematic diagram of the enlarged structure at E in the middle;

[0032] Fig. 9 is along Figure 4 Schematic diagram of the cross-sectional structure at DD in the middle;

[0033] Fig.10 yes Figure 2 Schematic diagram of the three-dimensional structure of the middle base;

[0034] Fig.11 yes Figure 2 Schematic diagram of the three-dimensional structure of the middle tray;

[0035] Fig.12 It is a schematic diagram of the structure of the present invention when it is used for an eight-cylinder V-type cylinder block;

[0036] Fig.13 is along Fig.12 Schematic diagram of the cross-sectional structure in the FF direction;

[0037] In the figure, 1, base, 2, left positioning support, 3, right positioning support, 4, left spindle hole positioning pin, 4a, limiting groove, 5, right spindle hole positioning pin, 5a, U-shaped groove, 6, tray, 6a, first through hole, 6b, second through hole, 6c, third through hole, 6d, notch, 6e, handle, 7, tray directional pin, 7a, shoulder, 8, first directional pin guide sleeve, 9, second directional pin guide sleeve, 9a, first transverse hole, 9b, second transverse hole, 9c, vertical hole, 10, spring, 11, directional pin handle, 12, gear shaft, 13, gear, 14, rack, 15, first crank, 16, first handle shaft, 17, limiting screw, 18, Screw sleeve, 19, screw rod, 19a, boss, 20, second crank, 21, second handle shaft, 22, tower-shaped ramp, 22a, first inclined plane, 22b, second inclined plane, 23, first positioning block, 24, second positioning block, 25, side support block, 26, pre-positioning block, 27, bottom support block, 28, guide sleeve, 29, side limit block, 30, end limit block, 31, bushing, 32, left spindle hole locating pin sleeve, 33, protective cover, 34, gear guide sleeve, 35, flat key, 36, first screw, 37, second screw, 38, handle sleeve, 39, right spindle hole locating pin sleeve, 40, end locating block, 41, V-type cylinder body. DETAILED DESCRIPTION

[0038] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods, but does not constitute any limitation to the present invention.

[0039] Reference Figures 2 to 4 and Fig. 9As shown, a V-type cylinder block cylinder bore honing fixture of the present invention comprises a base 1, and a left positioning support 2 and a right positioning support 3 are respectively provided at both ends of the base 1. A guide sleeve 28 is also provided on the grooves at both ends of the base 1 for connection and positioning with the machine tool worktable. A left spindle hole positioning pin 4 is provided on the left positioning support 2, and a right spindle hole positioning pin 5 is provided on the right positioning support 3. The left spindle positioning pin 4 and the right spindle positioning pin 5 are respectively matched with the spindle holes at both ends of the V-type cylinder block 41. Stops are provided at the ends of the left spindle positioning pin 4 and the right spindle positioning pin 5. When the end faces of the stop are tightly attached to the end faces of the V-type cylinder block 41, the V-type cylinder block 41 can be clamped. A driving mechanism that can drive the left spindle hole positioning pin 4 to move is arranged on one side of the left positioning support 2. Placing the driving mechanism on one side of the left positioning support 2 can effectively avoid the problem of interference between the fixture and the machine tool. A tray 6 for placing the V-shaped cylinder block 41 is movably mounted between the left spindle hole positioning pin 4 and the right spindle hole positioning pin 5. A locking structure that can make the same group of cylinder holes on the V-shaped cylinder block 41 face upward is arranged between the tray 6 and the right positioning support 3. A positioning device that supports the V-shaped cylinder block 41 is arranged on the base 1. Fig.11 As shown, the tray 6 is a semi-frame plate structure, two handles 6e are provided on the top surfaces of the two end plates of the tray 6, six side limit blocks 29 are installed on the two side surfaces of the bottom plate of the tray 6, and end limit blocks 30 are installed on the top surface and the front side of the right end plate of the tray 6. After the V-shaped cylinder body 41 is placed on the tray 6, the tray 6 is flipped by the handle 6e, driving the V-shaped cylinder body 41 to flip, and then the position of the tray 6 is fixed by the locking structure so that the same group of cylinder holes on the V-shaped cylinder body 41 face upward, and the positioning device can support the V-shaped cylinder body 41, thereby honing the cylinder holes on the V-shaped cylinder body 41.

[0040] Reference Figure 7 , Fig. 9 and Fig.13 As shown, the locking structure includes a first through hole 6a and a second through hole 6b provided on the tray 6 and a tray directional pin 7 movably inserted on the right positioning support 3. The first through hole 6a, the second through hole 6b and the tray directional pin 7 are all distributed on the same distribution circle with the center of the right spindle hole directional pin 5 as the center. The tray directional pin 7 can be inserted into the first through hole 6a and the second through hole 6b respectively. Bushings 31 are installed in the first through hole 6a and the second through hole 6b. When the tray directional pin 7 is inserted into the bushing 31 in the first through hole 6a, a group of cylinder holes on the right side of the V-shaped cylinder body 41 faces upward, and the group of cylinder holes on the right side can be honed; when the tray directional pin 7 is inserted into the bushing 31 in the second through hole 6b, a group of cylinder holes on the left side of the V-shaped cylinder body 41 faces upward, and the group of cylinder holes on the left side can be honed.

[0041] A third through hole 6c is provided on the symmetrical center line of the first through hole 6a and the second through hole 6b on the pallet, and the third through hole 6c is located on the same distribution circle as the first through hole 6a and the second through hole 6b, and the pallet orientation pin 7 can be inserted into the third through hole 6c. A bushing 31 is installed in the third through hole 6c. When the pallet orientation pin 7 is inserted into the bushing 31 in the third through hole 6c, the pallet 6 is in a horizontal state. At this time, the V-shaped cylinder block 41 can be hoisted onto the pallet 6, which can prevent the pallet 6 from rotating when the V-shaped cylinder block 41 is hoisted, thereby improving the safety of the operation.

[0042] The two ends of the right positioning support 3 are respectively provided with a first directional pin guide sleeve 8 and a second directional pin guide sleeve 9 which are sleeved on the outer periphery of the tray directional pin 7. The first directional pin guide sleeve 8 and the second directional pin guide sleeve 9 are both installed in the step hole above the right positioning support 3. Figure 5 As shown, the second directional pin guide sleeve 9 is provided with a first transverse hole 9a, a second transverse hole 9b and a vertical hole 9c connected to the first transverse hole 9a and the second transverse hole 9b. Fig. 9 , Figure 7 As shown, a shoulder 7a is provided on the tray orientation pin 7, and a spring 10 is sleeved on the outer periphery of the tray orientation pin 7. The two ends of the spring 10 are respectively pressed against the shoulder 7a and the end surface of the second orientation pin guide sleeve 9. A orientation pin handle 11 is provided on the tray orientation pin 7. The first orientation pin guide sleeve 8 and the second orientation pin guide sleeve 9 can play a guiding role in the movement of the tray orientation pin 7. When the orientation pin handle 11 is inserted into the first transverse hole 9a, the end of the tray orientation pin 7 is inserted into the bushing 31 of the first through hole 6a, the second through hole 6b or the third through hole 6c on the tray 6, so that the positioning of the tray 6 in three different directions can be achieved to fix the position of the tray 6. The elastic force of the spring 10 can improve the stability of the tray orientation pin 7 and prevent the tray orientation pin 7 from being loosened. At the same time, the elastic force can be provided for the tray orientation pin 7 to facilitate the resetting of the tray orientation pin 7. When the orientation pin handle 11 is inserted into the second transverse hole 9b, the end of the tray orientation pin 7 is away from the end surface of the tray 6. At this time, the tray 6 can be driven to flip by the handle 6e on the tray 6.

[0043] Reference Figure 6 and Fig. 9As shown, the driving mechanism includes a gear shaft 12 rotatably arranged in the left positioning support 2 and a gear 13 arranged at one end of the gear shaft 12, a rack 14 meshing and connected with the gear 13 is arranged on the left spindle hole positioning pin 4, and the other end of the gear shaft 12 is connected to the first handle shaft 16 through the first crank 15. A mounting hole is longitudinally opened in the middle of the two ends of the left positioning support 2, and a left spindle hole positioning pin sleeve 32 is installed in the mounting hole, a dustproof protective cover 33 is installed at the left end of the left spindle hole positioning pin sleeve 32, and the left spindle hole positioning pin 4 is installed at the right end. A transverse hole communicating with the mounting hole is horizontally opened in the middle and lower part of the front side of the left positioning support 2. The gear 13 is installed at the inner end of the transverse hole. A gear guide sleeve 34 is installed at the outer end of the transverse hole. The gear shaft 12 connects the gear 13 and the gear guide sleeve 34 together. The relative rotation of the gear 13 and the gear shaft 12 is limited by the flat key 35. The relative movement of the gear 13 and the gear shaft 12 is limited by the first screw 36. The axial movement of the gear shaft 12 is limited by the second screw 37. The hexagonal head at the right end of the gear shaft 12 is sheathed with the hexagonal hole at one end of the first crank 15. The first handle shaft 16 is installed in the threaded hole at the other end of the first crank 15. The outer periphery of the first handle shaft 16 is sheathed with a handle sleeve 38. The first handle shaft 16 is shaken, and then the left spindle hole positioning pin 4 is driven to move through the meshing of the gear shaft 12 and the gear 13, so as to realize the insertion and extraction of the spindle hole at the left end of the V-shaped cylinder body 41.

[0044] Continue to refer to Fig. 9 As shown, a limiting groove 4a is provided on the left spindle hole locating pin 4, and a limiting screw 17 clamped in the limiting groove 4a is provided on the left locating support 2. A countersunk threaded hole communicating with the mounting hole is provided in the middle of the top surface of the left locating support 2 for mounting the limiting screw 17. The limiting screw 17 passes through the radial through hole on the circumference of the left spindle hole locating pin sleeve 32 and is clamped in the limiting groove 4a on the circumference of the left spindle hole locating pin 4, so as to limit the travel of the left spindle hole locating pin 4.

[0045] Continue to refer to Fig. 9As shown, a screw sleeve 18 is provided at one end of the right positioning support 3, a screw rod 19 is rotatably provided in the right positioning support 3, the screw rod 19 and the screw sleeve 18 are connected by threads, a U-shaped groove 5a is provided at one end of the right spindle hole positioning pin 5, a boss 19a that is clamped in the U-shaped groove 5a is provided at one end of the screw rod 19, and the other end of the screw rod 19 is connected to the second handle shaft 21 through the second crank 20. A longitudinal hole is longitudinally provided in the middle of the two ends of the right positioning support 3, a right spindle hole positioning pin sleeve 39 is installed in the longitudinal hole, the right spindle hole positioning pin 5 is installed at the left end of the right spindle hole positioning pin sleeve 39, and the screw sleeve 18 is installed at the right end, the screw rod 19 and the screw sleeve 18 are connected by threads, the hexagonal head at the right end of the screw rod 19 is sleeved together with the hexagonal hole at one end of the second crank 20, the second handle shaft 21 is installed in the threaded hole at the other end of the second crank 20, and the handle sleeve 38 is sleeved on the periphery of the second handle shaft 21. The second handle shaft 21 is shaken, and the right spindle hole positioning pin 5 is driven through the screw rod 19 to achieve the insertion and removal of the spindle hole at the right end of the V-shaped cylinder body 41 .

[0046] Reference Figure 8 and Fig.10 As shown, the positioning device includes two tower-shaped inclined platforms 22 arranged on the base 1, and the tower-shaped inclined platforms 22 are provided with a first inclined surface 22a and a second inclined surface 22b arranged symmetrically, and the first inclined surface 22a and the second inclined surface 22b are respectively provided with a first positioning block 23 and a second positioning block 24. The first positioning block 23 and the second positioning block 24 are both installed on the tower-shaped inclined platform 22 by screws, and the first positioning block 23 and the second positioning block 24 can be used to position and support the bottom surface of the V-shaped cylinder block 41 when honing the cylinder block 41.

[0047] Continue to refer to Fig.11 As shown, both sides of the tray 6 are provided with notches 6d corresponding to the positions of the tower-shaped inclined platforms 22 to avoid interference with the two tower-shaped inclined platforms 22 on the base 1 and the first positioning blocks 23 and the second positioning blocks 24 installed on the two tower-shaped inclined platforms 22.

[0048] Reference Figure 2 As shown, the base 1 is provided with side support blocks 25 and pre-positioning blocks 26 for guiding on both sides. Fig.11 As shown, bottom support blocks 27 for guiding are respectively arranged on both sides of the tray 6. Side support blocks 25 and pre-positioning blocks 26 are arranged on the rectangular platforms raised on both sides of the middle part of the base 1, and six bottom support blocks 27 are installed on the step surfaces on both sides of the bottom plate of the tray 6. During the pinning process of the V-shaped cylinder body 41, the side support blocks 25, pre-positioning blocks 26 and bottom support blocks 27 can guide it.

[0049] Reference Fig. 9As shown, when changing to honing the eight-cylinder V-type cylinder block 41, it is only necessary to replace the end surface positioning block 40 with a smaller thickness dimension and adjust the extension length of the left spindle hole positioning pin 4 and the right spindle hole positioning pin 5 at the same time.

[0050] When the above-mentioned fixture is used, the fixture is installed on the machine tool, and then the V-shaped cylinder body 41 to be processed is hoisted onto the pallet 6, and the end surface positioning block 40 is placed between the left positioning support 2 and the V-shaped cylinder body 41. The first handle shaft 16 and the second handle shaft 21 are shaken to drive the left spindle hole positioning pin 4 and the right spindle hole positioning pin 5 respectively, so that they are inserted into the spindle holes at both ends of the V-shaped cylinder body 41. The second handle shaft 21 is further shaken to support the V-shaped cylinder body 41 through the stop at the end of the right spindle hole positioning pin 5. Make its other end face close to the end face positioning block 40, flip the tray 6 by the handle 6e on the tray 6, insert the directional pin handle 11 into the first transverse hole 9a on the second directional pin guide sleeve 9, at this time, the tray directional pin 7 is inserted into the bushing 31 of the first through hole 6a on the tray 6, the position of the tray 6 is fixed, and at the same time, the V-shaped cylinder body 41 presses the first positioning block 23 under the action of gravity. At this time, the V-shaped cylinder body 41 is in a fully positioned state, and the machine tool is started to hone the cylinder holes on the V-shaped cylinder body 41. After the same group of cylinder holes are processed, insert the directional pin handle 11 into the second transverse hole 9b on the second directional pin guide sleeve 9, and the tray 6 is flipped at an angle of α, so that the tray directional pin 7 is inserted into the bushing 31 of the second through hole 6b on the tray 6, and the other group of cylinder holes of the V-shaped cylinder body 41 are honed in the same way. The fixture can complete the honing of two groups of cylinder holes by hoisting once through the pallet 6 and the locking structure, and can be compatible with the honing of the cylinder holes of two types of V-type cylinder blocks 41, six-cylinder and eight-cylinder, which facilitates operation, greatly reduces the labor intensity of workers, and effectively improves production efficiency.

[0051] The above description is only a preferred embodiment of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A V-shaped cylinder block cylinder bore honing fixture, comprising a base (1), wherein two ends of the base (1) are respectively provided with a left positioning support (2) and a right positioning support (3), wherein the left positioning support (2) is provided with a left spindle hole positioning pin (4), and the right positioning support (3) is provided with a right spindle hole positioning pin (5), characterized in that: A driving mechanism capable of driving the left spindle hole positioning pin (4) to move is disposed on one side of the left positioning support (2); a tray (6) for placing the V-shaped cylinder block (41) is movably mounted between the left spindle hole positioning pin (4) and the right spindle hole positioning pin (5); a locking structure capable of causing the same group of cylinder holes on the V-shaped cylinder block (41) to face upward is disposed between the tray (6) and the right positioning support (3); a positioning device for supporting the V-shaped cylinder block (41) is disposed on the base (1); the locking structure comprises a first through hole disposed on the tray (6); The first through hole (6a), the second through hole (6b) and the tray directional pin (7) movably inserted into the right positioning support (3), the first through hole (6a), the second through hole (6b) and the tray directional pin (7) are all distributed on the same distribution circle with the center of the right spindle hole positioning pin (5) as the center, and a third through hole (6c) is arranged on the symmetrical center line of the first through hole (6a) and the second through hole (6b) on the tray (6), and the third through hole (6c) is located on the same distribution circle as the first through hole (6a) and the second through hole (6b).

2. A V-type cylinder block bore honing fixture according to claim 1, characterized in that: The two ends of the right positioning support (3) are respectively provided with a first orientation pin guide sleeve (8) and a second orientation pin guide sleeve (9) which are sleeved on the periphery of the pallet orientation pin (7); the second orientation pin guide sleeve (9) is respectively provided with a first transverse hole (9a), a second transverse hole (9b) and a vertical hole (9c) which are connected to the two transverse holes; the pallet orientation pin (7) is provided with a shoulder (7a); the pallet orientation pin (7) is sleeved with a spring (10); the two ends of the spring (10) are respectively pressed against the shoulder (7a) and the end surface of the second orientation pin guide sleeve (9); the pallet orientation pin (7) is provided with an orientation pin handle (11).

3. A V-type cylinder block bore honing fixture according to claim 1, characterized in that: The driving mechanism comprises a gear shaft (12) rotatably arranged in the left positioning support (2) and a gear (13) arranged at one end of the gear shaft (12); a rack (14) meshingly connected to the gear (13) is arranged on the left spindle hole positioning pin (4); and the other end of the gear shaft (12) is connected to a first handle shaft (16) via a first crank (15).

4. A V-type cylinder block bore honing fixture according to claim 3, characterized in that: The left spindle hole positioning pin (4) is provided with a limiting groove (4a), and the left positioning support (2) is provided with a limiting screw (17) which is clamped in the limiting groove (4a).

5. A V-type cylinder block bore honing fixture according to claim 1, characterized in that: A screw sleeve (18) is provided at one end of the right positioning support (3), a screw rod (19) is provided inside the right positioning support (3), the screw rod (19) and the screw sleeve (18) are connected via a thread, a U-shaped groove (5a) is provided at one end of the right spindle hole positioning pin (5), a boss (19a) is provided at one end of the screw rod (19) that is clamped in the U-shaped groove (5a), and the other end of the screw rod (19) is connected to a second handle shaft (21) via a second crank (20).

6. A V-type cylinder block bore honing fixture according to claim 1, characterized in that: The positioning device comprises two tower-shaped inclined platforms (22) arranged on the base (1), the tower-shaped inclined platforms (22) being provided with a first inclined surface (22a) and a second inclined surface (22b) which are symmetrically arranged, and the first inclined surface (22a) and the second inclined surface (22b) being provided with a first positioning block (23) and a second positioning block (24) respectively.

7. A V-type cylinder block bore honing fixture according to claim 6, characterized in that: Notches (6d) corresponding to the positions of the tower-shaped inclined platform (22) are provided on both sides of the tray (6).

8. The V-type cylinder block bore honing fixture according to claim 1, characterized in that: Side support blocks (25) and pre-positioning blocks (26) for guiding are respectively arranged on both sides of the base (1), and bottom support blocks (27) for guiding are respectively arranged on both sides of the tray (6).

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