A tool for installing a positioning pin on a cylinder main bearing seat

Abstract

The present invention discloses a tool for installing a locating pin on a main bearing seat of a cylinder body, comprising a tool body in the shape of a long rod, the upper end of the tool body being a shaft head in the shape of a spherical crown, a mounting sleeve connected to the lower end of the tool body, a mounting hole for inserting the locating pin and matching with the locating pin clearance being provided at the bottom of the mounting sleeve, and a clamping device for clamping the upper part of the locating pin in the mounting hole being provided on the mounting sleeve. Since the tool body has a certain length, the operator can install the locating pin into the locating pin hole without bending over, thereby reducing the labor intensity of the worker; the locating pin is clamped and fixed by the clamping device on the mounting sleeve for the fingers, and the operator holds the middle part of the tool body, and the hammer head is away from the workpiece and the holding part when hammering, thereby avoiding the occurrence of accidents of hand injury and avoiding damage to the surface structure of the main bearing seat. In addition, after appropriate modification, it can be applied to the assembly of other locating pins of different sizes or narrow positions.

Description

Technical Field

[0001] The invention relates to the technical field of pin shaft installation, and more specifically to a tool for installing a positioning pin on a main bearing seat of a cylinder body. Background Art

[0002] Before machining the crankshaft hole of a diesel engine cylinder block, multiple main bearing caps need to be assembled at multiple main bearing seat positions of the cylinder block. The main bearing seats and main bearing caps need to be repeatedly disassembled and assembled due to machining, assembly, maintenance, etc. To ensure the accuracy of repeated assembly, there are two positioning pins between each pair of main bearing caps and main bearing seats to limit their position accuracy.

[0003] The assembly process of the cylinder block locating pin is as follows: the operator grabs the locating pin with one hand, aligns one end with the pin hole at the main bearing seat, and grabs a hammer with the other hand to knock the locating pin into the hole. During this process, since the locating pin itself is small, it is easy to hurt fingers or hit the main bearing seat installation surface when holding the locating pin, causing safety accidents or quality accidents; at the same time, the main bearing seat pin hole is installed inside the cylinder skirt, and the operator bends a lot during assembly, and the frequent operation has high labor intensity.

[0004] Therefore, how to solve the problem of inconvenience in installation and potential safety hazards during the installation of the cylinder locating pin is an urgent problem to be solved by technical personnel in this field. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a tool for installing the locating pins on the cylinder main bearing seat, which can significantly improve the safety and convenience of installing the locating pins on the cylinder main bearing seat and reduce the labor intensity of the installation workers.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A tool for installing a locating pin on a cylinder main bearing seat, comprising a long rod-shaped tool body, the upper end of the tool body is a spherical crown-shaped shaft head, the lower end of the tool body is connected to a mounting sleeve, the bottom of the mounting sleeve is provided with a mounting hole for inserting the locating pin and matching with the locating pin clearance, and the mounting sleeve is also provided with a clamping device for clamping the upper part of the locating pin to the mounting hole.

[0008] Preferably, the mounting hole is a first through hole that vertically penetrates the mounting sleeve, the lower end of the tooling body is provided with a boss that is inserted into the first through hole from the top of the mounting sleeve, the upper part of the mounting sleeve is provided with a second through hole that horizontally penetrates the mounting sleeve and is orthogonal to the first through hole, the boss is provided with a third through hole that is opposite to the second through hole and has the same diameter as the second through hole, and the tooling body and the mounting sleeve are fixedly connected by a coupling pin inserted into the second through hole and the third through hole.

[0009] Preferably, the mounting sleeve is provided with a retaining spring groove on the outer side of the coupling pin, and a retaining spring for preventing the coupling pin from falling off is installed in the retaining spring groove.

[0010] Preferably, the length of the protruding column is equal to half the length of the first through hole.

[0011] Preferably, the tool body is a steel part, and the mounting sleeve is a copper alloy mounting sleeve.

[0012] Preferably, the cross-section of the tool body is circular, and the diameter of the shaft head is larger than the diameter of the tool body.

[0013] Preferably, the mounting sleeve is a cylindrical mounting sleeve, and the diameter of the mounting sleeve is larger than the diameter of the tooling body.

[0014] Preferably, the axes of the tool body, the mounting sleeve and the mounting hole coincide with each other.

[0015] Preferably, the length of the tool body is 100-200 mm.

[0016] Preferably, the clamping device includes a T-shaped ball pin with a hemispherical head, a screw, and a spring arranged between the ball pin and the screw. The mounting sleeve is provided with stepped holes on both sides of the mounting hole that are connected to the mounting hole and cooperate with the ball pin. The ball pin is inserted into the inner end of the stepped hole, and the outer end of the stepped hole is provided with an internal thread that cooperates with the screw. The screw is screwed into the internal thread and is pressed against the ball pin by a spring so that the hemispherical head of the ball pin extends into the mounting hole.

[0017] The tooling provided by the present invention is used for installing the locating pin on the cylinder main bearing seat. When the locating pin needs to be installed into the locating pin hole on the main bearing seat, the upper end of the locating pin can be inserted into the mounting hole at the bottom of the mounting sleeve that matches the clearance of the locating pin, and the locating pin can be fixed in the mounting hole by a clamping device to prevent the locating pin from falling off. The lower end of the locating pin is exposed outside the mounting sleeve. Then, the tooling body is held with one hand, and the lower end of the locating pin is aligned with the locating pin hole on the main bearing seat. The hammer is held with the other hand and is struck at the shaft head to drive the locating pin into the locating pin hole. Then, the mounting sleeve is pulled out from the locating pin. The locating pin remains on the locating pin hole of the main bearing seat due to the interference fit. Then, the assembly of other locating pins can be completed in the same way.

[0018] Since the tool body has a certain length, the length of the tool body can be selected according to the height of the assembly surface, and the operator can install the locating pin into the locating pin hole without bending over, thereby reducing the labor intensity of the worker; the locating pin is fixed by the fingers through the clamping device on the installation sleeve, and the operator holds the middle part of the tool body, and the hammer head is away from the workpiece and the holding part when hammering, thereby avoiding accidents of hand injuries and avoiding damage to the surface structure of the main bearing seat. In addition, the present invention also has the characteristics of simple structure and good versatility. After appropriate modification, it can be applicable to the assembly of other locating pins of different sizes or narrow positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention 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 embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0020] Figure 1 A schematic diagram of a specific embodiment of a tooling for installing a locating pin on a cylinder main bearing seat provided by the present invention;

[0021] Figure 2 It is a schematic diagram of the internal structure of the installation sleeve;

[0022] Figure 3 A schematic diagram of inserting the locating pin into the mounting hole;

[0023] Figure 4 A schematic diagram of aligning the locating pin with the locating pin hole;

[0024] Figure 5 A schematic diagram of inserting a locating pin into a locating pin hole;

[0025] Figure 6 Illustration of the completed installation of the dowel pin.

[0026] Among them, 1-tooling body, 11-boss, 2-axis head, 3-mounting sleeve, 31-circlip groove, 32-circlip, 33-second through hole, 34-first through hole, 4-mounting hole, 5-clamping device, 51-ball pin, 52-spring, 53-screw, 6-coupling pin, 7-locating pin, 8-main bearing seat, 9-locating pin hole. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The core of the present invention is to provide a tool for installing the locating pins on the main bearing seat of the cylinder body, which can significantly improve the safety and convenience of installing the locating pins on the main bearing seat of the cylinder body and reduce the labor intensity of the installation workers.

[0029] Please refer to Figures 1 to 6 , Figure 1 A schematic diagram of a specific embodiment of a tooling for installing a locating pin on a cylinder main bearing seat provided by the present invention; Figure 2 It is a schematic diagram of the internal structure of the installation sleeve; Figure 3 A schematic diagram of inserting the locating pin into the mounting hole; Figure 4 A schematic diagram of aligning the locating pin with the locating pin hole; Figure 5 A schematic diagram of inserting a locating pin into a locating pin hole; Figure 6 Illustration of the completed installation of the dowel pin.

[0030] The tooling provided by the present invention for installing the locating pin on the main bearing seat of the cylinder body includes a long rod-shaped tooling body 1, the upper end of the tooling body 1 is a spherical crown-shaped shaft head 2, the lower end of the tooling body 1 is connected to a mounting sleeve 3, the bottom of the mounting sleeve 3 is provided with a mounting hole 4 for inserting the locating pin 7 and the clearance fit with the locating pin 7, and the mounting sleeve 3 is also provided with a clamping device 5 for clamping the upper part of the locating pin 7 to the mounting hole 4.

[0031] Among them, the tooling body 1 can be a cylindrical rod-shaped structure, and the upper end of the tooling body 1 is a spherical crown-shaped tapping head, so that the tooling body 1 can be struck with a hammer. Specifically, the shaft head 2 is a hemispherical shaft head 2, and the lower end of the tooling body 1 is connected with a mounting sleeve 3, which can also be a cylindrical structure. Specifically, the diameter of the mounting sleeve 3 can be larger than the diameter of the tooling body 1. Of course, the mounting sleeve 3 can also be an integrated structure with the tooling body 1.

[0032] The bottom of the mounting sleeve 3 is provided with a mounting hole 4, which is used to insert the positioning pin 7. The positioning pin 7 and the mounting hole 4 are matched with each other in a clearance. The mounting sleeve 3 is also provided with a clamping device 5, which is used to clamp the positioning pin 7 inserted in the mounting hole 4, so that when the positioning pin 7 is inserted in the mounting hole 4, the positioning pin 7 can be clamped and fixed in the mounting hole 4 by the clamping device 5 to prevent the positioning pin 7 from sliding out under the action of gravity. Specifically, the axis of the mounting hole 4, the mounting sleeve 3 and the tool body 1 coincide, so that when the hammer is struck on the shaft head 2 of the tool body 1, the positioning pin 7 is ensured to be subjected to pressure along its axial direction, and then the positioning pin 7 is ensured to be driven into the positioning pin hole 9 on the main bearing seat 8 along the axial direction, so as to prevent the main bearing seat 8 from being damaged by lateral impact force. The mounting hole 4 is a hole with a slight clearance processed according to the outer diameter and length of the positioning pin 7.

[0033] It should be pointed out that the depth of the mounting hole 4 should be determined by the length of the locating pin 7 and the length of the locating pin hole 9. Specifically, when the upper end of the locating pin 7 is inserted into the bottom end of the mounting hole 4, the length of the locating pin 7 exposed from the mounting hole 4 should not be less than the length of the locating pin 7 that needs to be inserted into the locating pin hole 9.

[0034] The tooling provided by the present invention is used to install the locating pin on the main bearing seat of the cylinder body. When the locating pin 7 needs to be installed in the locating pin hole 9 on the main bearing seat 8, the upper end of the locating pin 7 can be inserted into the mounting hole 4 at the bottom of the mounting sleeve 3 that is clearance-matched with the locating pin 7, and the locating pin 7 can be fixed in the mounting hole 4 by the clamping device 5 to prevent the locating pin 7 from falling off. The lower end of the locating pin 7 is exposed outside the mounting sleeve 3, and then the tooling body 1 is held in one hand, and the lower end of the locating pin 7 is aligned with the locating pin hole 9 on the main bearing seat 8. The hammer is held in the other hand and is struck at the shaft head 2 to drive the locating pin 7 into the locating pin hole 9, and then the mounting sleeve 3 is pulled out from the locating pin 7. The locating pin 7 remains on the locating pin hole 9 of the main bearing seat 8 due to the interference fit, and then the assembly of other locating pins 7 can be completed in the same way.

[0035] Since the tool body 1 has a certain length, the length of the tool body can be selected according to the height of the assembly surface, and the operator can install the locating pin 7 into the locating pin hole 9 without bending over, thereby reducing the labor intensity of the worker; the clamping device 5 on the mounting sleeve 3 is used to clamp and fix the locating pin 7 for the fingers, and the operator holds the middle part of the tool body 1, and the hammer head is away from the workpiece and the holding part when hammering, thereby avoiding accidents of hand injuries and avoiding damage to the surface structure of the main bearing seat 8. In addition, the present invention also has the characteristics of simple structure and good versatility. After appropriate modification, it can be suitable for assembly operations of other locating pins 7 of different sizes or narrow positions.

[0036] On the basis of the above embodiments, taking into account the setting of the specific connection method between the mounting sleeve 3 and the tooling body 1, as a preferred embodiment, the mounting hole 4 is a first through hole 34 that vertically penetrates the mounting sleeve 3, and the lower end of the tooling body 1 is provided with a boss 11 that is inserted into the first through hole 34 from the top of the mounting sleeve 3, and the upper part of the mounting sleeve 3 is provided with a second through hole 33 that horizontally penetrates the mounting sleeve 3 and is orthogonal to the first through hole 34, and the boss 11 is provided with a third through hole that is opposite to the second through hole 33 and has the same diameter as the second through hole 33, and the tooling body 1 and the mounting sleeve 3 are fixedly connected by a coupling pin 6 inserted into the second through hole 33 and the third through hole.

[0037] The cam 11 is provided with a protruding post 11 which cooperates with the first through hole 34 so as to insert the protruding post 11 into the through hole from the top of the first through hole 34, and the upper part of the mounting sleeve 3 is also provided with a second through hole 33 which is orthogonal to the first through hole 34 and passes the mounting sleeve 3 left and right, and the protruding post 11 is provided with a third through hole which has the same diameter as and is directly opposite to the second through hole 33, so as to fix the mounting sleeve 3 and the fixture body 1 together by means of a coupling pin 6 inserted into the first through hole 34 and the second through hole 33, and the positioning pin 7 inserted into the first through hole 34 from the bottom of the first through hole 34 can be inserted into the protruding post 11 so as to directly apply pressure to the positioning pin 7 through the fixture body 1 to avoid deformation of the positioning sleeve under long-term impact force and deformation of the mounting hole 4, thereby improving the service life of the mounting sleeve 3, and in addition, the mounting sleeve 3 with mounting holes 4 of different apertures can be replaced by disassembling and assembling the coupling pin 6 to meet different needs.

[0038] On the basis of the above embodiment, as a preferred embodiment, the mounting sleeve 3 is provided with a retaining spring groove 31 on the outer side of the coupling pin 6, and a retaining spring 32 for preventing the coupling pin 6 from falling off is installed in the retaining spring groove 31. This prevents the coupling pin 6 from sliding out and falling off during use, and ensures the reliability of the connection between the mounting sleeve 3 and the tooling body 1.

[0039] On the basis of the above embodiment, considering that under normal circumstances, only one half of the locating pin 7 needs to be driven into the locating pin hole 9, in order to further improve the convenience of the present invention, as a preferred embodiment, the length of the boss 11 is equal to one half of the length of the first through hole 34. Specifically, the length of the first through hole 34 can be equal to the length of the locating pin 7, that is, the height of the mounting sleeve 3 is equal to the height of the locating pin 7, so that one half of the locating pin 7 can be inserted into the lower part of the first through hole 34, so that one half of the locating pin 7 is exposed at the lower end of the mounting sleeve 3. When installing the locating pin 7, a hammer can be used to knock the shaft head 2 until the bottom end face of the mounting sleeve 3 contacts the end face of the main bearing seat 8, so as to ensure that the locating pin 7 is pressed into place.

[0040] On the basis of the above embodiment, in order to prevent the end surface structure of the main bearing seat 8 from being damaged when the mounting sleeve 3 contacts the end surface of the main bearing seat 8, as a preferred embodiment, the mounting sleeve 3 is a copper alloy mounting sleeve. The material of the copper alloy is softer than the main bearing seat 8 made of cast iron, which can prevent the mounting sleeve 3 from damaging the end surface structure of the main bearing seat 8 under impact.

[0041] On the basis of the above embodiment, as a preferred embodiment, the cross section of the tool body 1 is circular, and the diameter of the shaft head 2 is larger than the diameter of the tool body 1. In order to facilitate the striking of the shaft head and further reduce the risk of accidental injury to the operator, considering the specific length setting of the tool body 1, preferably, the length of the tool body 1 is 100-200mm. Of course, the length of the tool body 1 can also be set to other sizes as needed, but it should be pointed out that the length of the tool body 1 should not be too long, otherwise it is not easy to hold and operate.

[0042] On the basis of any of the above-mentioned embodiments, taking into account the specific setting method of the clamping device 5, as a preferred embodiment, the clamping device 5 includes a T-shaped ball pin 51 with a hemispherical head, a screw 53 and a spring 52 arranged between the ball pin 51 and the screw 53. The mounting sleeve 3 is provided with stepped holes on both sides of the mounting hole 4, which are connected to the mounting hole 4 and cooperate with the ball pin 51. The ball pin 51 is inserted into the inner end of the stepped hole, and the outer end of the stepped hole is provided with an internal thread that cooperates with the screw 53. The screw 53 is screwed into the internal thread and is pressed against the ball pin 51 by the spring 52, so that the hemispherical head of the ball pin 51 extends into the mounting hole 4.

[0043] In this embodiment, stepped holes with smaller inner sides and larger outer sides are provided on both sides of the mounting hole 4 of the mounting sleeve 3. The stepped holes are installed in cooperation with the T-shaped ball pin 51 so that the T-shaped ball pin 51 can be inserted into the stepped holes. The screw 53 is provided at the outer end of the stepped hole, and a spring 52 is provided between the ball pin 51 and the screw 53 so that the elastic force of the spring 52 can be used to clamp the locating pin 7. After the locating pin 7 leaves the locating pin 7 mounting hole 4, the ball center head of the ball pin 51 automatically extends out of the mounting hole 4.

[0044] Since the head of the ball pin 51 extending into the mounting hole 4 is a hemispherical structure, when inserting the positioning pin 7 into the mounting hole 4, the guide portion of the upper end surface of the positioning pin 7 and the ball head of the ball pin 51 are squeezed, and the spring 52 at the tail is compressed and retreated after the ball head is subjected to force, so that the positioning pin 7 is inserted into the bottom of the mounting hole 4. At the same time, the ball head of the ball pin 51 supports the outer circle of the positioning pin 7, so that the positioning pin 7 will not fall during the turning of the tooling. The compression amount of the spring 52 can be adjusted by screwing the screw 53 to control the clamping force of the ball pin 51 on the positioning pin 7 inserted into the mounting hole 4.

[0045] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0046] The above is a detailed introduction to the tooling provided by the present invention for installing the locating pin on the main bearing seat of the cylinder block. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A tool for installing a locating pin on a cylinder main bearing seat, characterized in that: The tooling body (1) comprises a long rod-shaped tooling body (1), the upper end of the tooling body (1) is a spherical crown-shaped shaft head (2), the lower end of the tooling body (1) is connected to a mounting sleeve (3), the bottom of the mounting sleeve (3) is provided with a mounting hole (4) for inserting a positioning pin (7) and having a clearance fit with the positioning pin (7), and the mounting sleeve (3) is also provided with a clamping device (5) for clamping the upper part of the positioning pin (7) to the mounting hole (4); The mounting hole (4) is a first through hole (34) that vertically penetrates the mounting sleeve (3); a boss (11) is provided at the lower end of the tool body (1) and is inserted into the first through hole (34) from the top of the mounting sleeve (3); a second through hole (33) is provided at the top of the mounting sleeve (3) and is perpendicular to the first through hole (34); a third through hole is provided on the boss (11) and is opposite to the second through hole (33) and has the same diameter as the second through hole (33); the tool body (1) and the mounting sleeve (3) are fixedly connected by a coupling pin (6) inserted into the second through hole (33) and the third through hole; The mounting sleeve (3) is provided with a retaining spring groove (31) on the outer side of the coupling pin (6), and a retaining spring (32) is installed in the retaining spring groove (31) for preventing the coupling pin (6) from falling off; The length of the protruding column (11) is equal to one half of the length of the first through hole (34), and the length of the first through hole (34) is equal to the length of the positioning pin (7), one half of the positioning pin (7) is inserted into the lower part of the first through hole (34), and one half of the positioning pin (7) is exposed at the lower end of the mounting sleeve (3); The tool body (1) is a steel part, and the installation sleeve (3) is a copper alloy installation sleeve; The axes of the tool body (1), the mounting sleeve (3) and the mounting hole (4) coincide with each other; The clamping device (5) comprises a T-shaped ball pin (51) with a hemispherical head, a screw (53) and a spring (52) arranged between the ball pin (51) and the screw (53); the mounting sleeve (3) is provided with stepped holes on both sides of the mounting hole (4) which are connected to the mounting hole (4) and cooperate with the ball pin (51); the ball pin (51) is inserted into the inner end of the stepped hole; the outer end of the stepped hole is provided with an internal thread which cooperates with the screw (53); the screw (53) is screwed into the internal thread and is pressed against the ball pin (51) by the spring (52) so that the hemispherical head of the ball pin (51) extends into the mounting hole (4).

2. The tooling for installing the positioning pin on the cylinder main bearing seat according to claim 1 is characterized in that: The tool body (1) has a circular cross-section, and the diameter of the shaft head (2) is greater than the diameter of the tool body (1).

3. The tooling for installing the positioning pin on the cylinder main bearing seat according to claim 2 is characterized in that: The mounting sleeve (3) is a cylindrical mounting sleeve, and the diameter of the mounting sleeve (3) is greater than the diameter of the tool body (1).

4. The tooling for installing the positioning pin on the cylinder main bearing seat according to claim 1 is characterized in that: The length of the tool body (1) is 100-200 mm.

Images