JP2006226139A - Jig for assembling coil spring and jig for assembling hydraulic motor with brake - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a jig for assembling a coil spring by which a compression coil spring can be surely assembled even in a hydraulic motor with brake whose motor cover is thin. <P>SOLUTION: The jig for assembling a coil spring is equipped with a spring retaining plate having a recess for retaining a spring at one end, a motor cover gripping plate, a coupling means for coupling the other end of the spring retaining plate to the other end of the motor cover gripping plate and a clearance holding means for holding the spring retaining plate and the motor cover gripping plate with a prescribed space in between. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a coil spring assembly jig for temporarily fixing a plurality of coil springs and a method for assembling a brake hydraulic motor so that the brake coil springs do not fall off during assembly of the brake hydraulic motor.

  In a conventional hydraulic motor with a brake, in order to obtain a desired braking force, several to several tens of compression coil springs pressed against a brake friction plate are incorporated. As an example of the configuration of the hydraulic motor with brake, as shown in FIG. 4, a brake piston that brakes the rotation of the friction plate 35 integral with the cylinder barrel 32 by pressing the friction plate 35 against the motor body 20 and the motor cover 21. 34 and a plurality of compression coil springs 25 disposed between the casing 20 and the brake piston 34 so as to press the brake piston 34 against the friction plate 35, and the plurality of compression coil springs 25 are annular retainers 90. It has been proposed that the annular retainer 90 is inserted into a plurality of holes 91 provided in the casing and fitted into one annular groove provided in the casing (for example, Patent Document 1). In FIG. 4, 33 is a brake device, 30 is a shaft of a hydraulic motor, 31 is a piston of the hydraulic motor, and 36 is a swash plate of the hydraulic motor.

  And in the above-mentioned patent document 1, it is not necessary to provide holes for inserting a plurality of compression coil springs 25 in the motor cover 21 at the time of assembly, and the cost is reduced, and the compression coil springs 25 and the annular cage 90 are provided. It is described that since it is possible to assemble with a combination, it is not necessary to pay close attention to prevent the compression coil spring 25 from falling apart during assembly, and the assembly of the spring is facilitated.

JP 2003-139040 A

  When the brake-equipped hydraulic motor is used for driving an endless crawler belt, the motor gear casing 38 can be rotated via a bearing (not shown) on the other end side of the motor body 20 as shown by a dotted line in FIG. The shaft of the hydraulic motor with brake and the motor gear casing 38 are connected via a built-in speed reducer 37, and a sprocket 39 for an endless crawler belt drive 40 is fixed to the motor gear casing 38. . In this case, since it is necessary to fit the brake-equipped hydraulic motor within the range of the width of the endless crawler belt 40, it is necessary to shorten the overall length of the motor body 20, the motor cover 21, and the motor gear casing 38 as much as possible. In the thing of the cited reference 1, when using it for the drive of an endless crawler belt, since the annular groove 23 is provided in the motor cover 21, the intensity | strength of the motor cover 21 falls. Further, the depth of the plurality of holes 91 of the annular cage 90 into which the compression coil spring 25 is inserted is also reduced, and there remains a possibility that the compression coil spring 25 will be separated when the hydraulic compression coil spring 25 is assembled.

  On the other hand, without having the annular retainer 90, as shown in FIG. 5, a plurality of spring insertion holes 24 are directly drilled in the motor cover 21, and the ends of the plurality of compression coil springs 25 are inserted into the spring insertion holes 24. A method of assembling by inserting each of them and fixing them with a highly viscous grease 92 or the like has also been conventionally performed. However, in the method of fixing and assembling with the above-described grease 92 or the like, since the grease 92 is used, the assembling becomes complicated, and the grease 92 applied in a large amount in the hydraulic motor with brake after the assembling becomes a hydraulic device. There is a problem of clogging the orifice inside.

  The present invention is intended to solve the above-described problems of the conventional configuration, and the compression coil spring 25 is reliably assembled even in a brake-equipped hydraulic motor in which the motor cover 21 is thin. An object of the present invention is to provide a coil spring assembling jig that can be attached and a method of assembling a hydraulic motor with a brake.

  The present invention has been made to solve the above-described conventional problems, and each of the inventions described in the scope of the claims includes the following (1) to (4) as a coil spring assembling jig and assembling method, respectively. ) Are used.

  (1) The coil spring assembling jig of the first means includes a spring holding plate having a spring holding recess at one end, a motor cover holding plate, the other end of the spring holding plate, and the motor cover holding plate. It is characterized by comprising connecting means for connecting the other end, and jig fixing means for holding the spring holding plate and the motor cover holding plate at a predetermined interval.

  (2) The coil spring assembling jig of the second means includes a motor body in which a brake and a motor are incorporated, and a motor cover that covers one end of the motor body and has a plurality of brake spring insertion holes. And a spring holding recess at one end of the coil spring assembly jig used for assembling the brake hydraulic motor having a plurality of brake compression springs inserted into the plurality of spring insertion holes, respectively. A spring holding plate, a motor cover holding plate, a connecting means for connecting the other end of the spring holding plate and the other end of the motor cover holding plate, and the spring holding plate and the motor cover holding plate And a jig fixing means for holding at intervals.

  (3) A third means for assembling the brake-equipped hydraulic motor includes a motor body incorporating the brake and the motor, a motor body that covers one end of the motor body and has a plurality of spring insertion holes for brakes. In a method of assembling a brake-equipped hydraulic motor provided with a cover, a spring holding plate and a motor cover each having a plurality of compression coil springs for braking inserted into the plurality of spring insertion holes and having a spring holding recess at one end A coil spring assembling jig provided with a grip plate is fixed to the motor cover, and the plurality of compression coil springs are held by the spring holding recesses, and then the plurality of compression coil springs are assembled. The motor cover is pressed against the motor body together with the coil spring assembly jig 1, the coil spring assembly jig is removed, and the motor cover is attached to the module. Characterized in that fixed to the motor body.

  (4) A fourth means for assembling the brake-equipped hydraulic motor includes a motor body including the brake and the motor, a motor body that covers one end of the motor body, and a plurality of brake spring insertion holes are formed. A cover, a speed reducer connected to the shaft at the other end of the motor body, a motor gear casing connected to the speed reducer and rotatably provided on the outer periphery of the motor body, and fixed to the motor gear casing In the assembling method of the hydraulic motor with brake provided with the endless crawler sprocket, a plurality of brake coil springs are inserted into the plurality of spring insertion holes, and a spring holding recess is formed at one end. A plurality of coil spring assembling jigs each having a spring holding plate and a motor cover holding plate connected by connecting means are arranged around the motor cover by jig fixing means. After the plurality of compression coil springs are held by the spring holding recesses, the motor cover on which the plurality of compression coil springs are assembled is attached to the motor body together with the coil spring assembly jig. The coil cover assembly jig is pressed to remove the coil spring assembly jig, and the motor cover is fixed to the motor body.

  The invention according to each claim described in the claims employs the means described in the above (1) to (4), and thus has the following effects.

  That is, since the inventions according to claims 1 to 4 employ the first to fourth means, the hydraulic motor with brake is assembled using the coil spring assembly jig of the first or second means. Alternatively, by assembling the hydraulic motor with brake by the method of the third or fourth means, it is possible to prevent a plurality of springs from dropping when the hydraulic motor with brake is assembled.

  Hereinafter, a method for assembling a coil spring assembling jig and a brake-equipped hydraulic motor according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of a coil spring assembly jig according to an embodiment of the present invention, and FIG. 2 shows a state where the coil spring assembly jig according to the embodiment of the present invention is assembled to a motor casing. FIG. 3 is a partially enlarged sectional view of FIG.

  First, referring to FIG. 2 and FIG. 4, the configuration of the hydraulic motor with brake using the coil spring assembling jig according to the embodiment of the present invention or assembling by the method of assembling the hydraulic motor with brake is described. explain. As shown in FIG. 4, a brake device 33, a hydraulic motor, and the like are built in the motor body 20 of the hydraulic motor with brake. That is, in the motor main body 20, a hydraulic motor shaft 30 located at the center, a hydraulic motor swash plate 36 attached to the outer periphery of the shaft 30, and a hydraulic pressure coupled to the swash plate 36 via a spherical bearing. A motor piston 31 is provided. Further, a cylindrical brake piston 34 for braking the rotation of the friction plate 35 integral with the cylinder barrel 32 by pressing the friction plate 35 against the motor body 20 and the motor cover 21 is also provided.

  On the other hand, a motor cover 21 that covers a shaft 30, a piston 31, a cylinder barrel 32, a brake piston 34, and the like built in the motor body 20 is attached to one end of the motor body 20 by a bolt nut and the like (not shown). As shown in FIG. 2, an annular groove 23 is formed in the motor cover 21 at a position where the piston 31 faces. A plurality (10 in FIG. 2) of spring insertion holes 24 are formed in the annular groove 23 in order to position a compression coil spring 25 described later. The annular groove 23 is not necessarily required, and the surface of the motor cover 21 that faces the motor body 20 is a flat surface (excluding portions such as the hydraulic oil flow path), and a plurality of spring insertion holes 24 are formed on the flat surface. May be drilled. A positioning pin 27 for positioning the motor main body 20 and the motor cover 21 is attached to the inner surface of the motor cover 21, and a plurality of motor assembly bolt holes for fixing are provided on the outer periphery of the motor cover 21. 26 is drilled.

  A plurality of compression coil springs 25 are built in between the piston 31 and the plurality of spring insertion holes 24 in order to press against the friction plate 35 for braking in order to obtain a desired braking force. The spring insertion hole 24 into which one end of each compression coil spring 25 is inserted has a shallow depth because the motor cover 21 is thin.

  Further, as shown by a dotted line in FIG. 4, a motor gear casing 38 is rotatable at the other end of the motor body 20 through a roller bearing or the like not shown on the outer periphery of the motor body 20 so as to cover the motor body 20. It is arranged. A reduction gear 37 is disposed between the motor body 20 and the motor gear casing 38, the input side of the reduction gear 37 is connected to the shaft 30 of the hydraulic motor, and the output side is connected to the motor gear casing 38. Has been. Further, a sprocket 39 for the endless crawler belt 40 is fixed to the outer periphery of the motor gear casing 38 by a bolt nut and the like (not shown).

  At this time, the length of the hydraulic motor (the length from the end of the motor cover 21 to the end of the motor gear casing 38) is equal to or less than the width of the endless crawler belt 40, or the amount of protrusion from the left and right ends of the endless crawler belt 40 is Created to be as few as possible. That is, if a part of the hydraulic motor protrudes from the endless crawler belt 40, the hydraulic motor may be damaged by hitting an obstacle when the vehicle with the endless crawler belt 40 is running.

  Next, a coil spring assembling jig 1 used when assembling the above-described hydraulic motor with brake will be described with reference to FIG. As shown in FIG. 1, the coil spring assembling jig 1 includes a spring holding plate 2, a motor cover holding plate 12, a connecting means 18, and a jig fixing means 19.

  In order to hold the plurality of compression coil springs 25, the spring holding plate 2 has a spring holding recess 7 cut out in an arc shape at one end. By inserting the tip of the spring holding recess 7 into each compression coil spring 25 as shown in FIG. 2, each compression coil spring 25 can be temporarily fixed. Further, a positioning pin insertion recess 8 is also provided at the center of the spring holding plate 2. At the other end of the spring holding plate 2, a jig assembling rear plate 3 as a connecting means 18 is formed by bending the other end of the spring holding plate 2. A plurality of fixing bolt insertion holes 5 are formed in the jig assembly rear plate 3, and a handle 9 is attached. Also, jig assembly side plates 4 as jig fixing means 19 are formed on both side surfaces of the spring holding plate 2 by bending the side portions of the spring holding plate 2. A fixing bolt insertion hole 6 is formed in the jig assembly side plate 4.

  The motor cover holding plate 12 has a motor casing fitting recess 17 cut out in a concave shape to hold the motor cover 21. On the other end of the motor cover holding plate 12, a jig assembling rear plate 13 as a connecting means 18 is formed by bending the other end of the motor cover holding plate 12. A plurality of fixing bolt insertion long holes 15 are formed in the jig assembling rear plate 13. Further, jig assembly side plates 14 as jig fixing means 19 are formed on both side surfaces of the motor cover holding plate 12 by bending the side portions of the motor cover holding plate 12. A fixing bolt insertion long hole 16 is formed in the jig assembly side plate 14.

  At the time of assembly, the jig assembly rear plate 3 of the spring holding plate 2 and the jig assembly rear plate 13 of the motor cover holding plate 12 are overlapped, and are not shown in the fixing bolt insertion hole 5 and the fixing bolt insertion long hole 15. The coil spring assembling jig 1 is assembled by inserting a bolt and tightening a nut (not shown).

  When assembling the hydraulic motor with brake, the coil spring assembling jig 1 assembled as described above is gripped by the motor cover 21 as shown in FIGS. Fix it. At this time, the spring holding recess 7 at one end of the spring holding plate 2 is in a state of covering about half of the spring insertion hole 24.

  Thereafter, a plurality of brake coil springs 25 for braking are respectively inserted into the plurality of spring insertion holes 24 of the motor cover 21 while being engaged with the spring holding recesses 7. In this way, all the plurality of compression coil springs 25 are held in the spring holding recesses 7. If the positioning pin 27 is present, the positioning pin 27 is fitted into the positioning pin insertion recess 8.

  In addition, after inserting a plurality of compression coil springs 25 for brakes into a plurality of spring insertion holes 24 in advance, the assembled coil spring assembly jig 1 is connected to the spring holding recess 7 at one end thereof as a compression coil. The motor cover 21 may be sandwiched and held while being engaged with the spring 25 and fixed by the jig fixing means 19.

  The state at this time is shown in FIG. As shown in FIG. 3, the motor cover 21 is sandwiched between the spring holding plate 2 and the motor cover holding plate 12 of the coil spring assembly jig 1, and the motor cover 21, the spring holding plate 2, and the motor cover holding plate 12 are Are fixed by the jig fixing means 19 so as to be in close contact with each other. In FIG. 3, the depth of the spring insertion hole 24 is exaggerated and deeply illustrated, but is actually shallow and about a few turns of the compression coil spring 25.

  As described above, after all of the plurality of compression coil springs 25 are held by the spring holding recesses 7, the motor cover 21 assembled with the plurality of compression coil springs 25 is mounted together with the coil spring assembly jig 1 on the motor body. Press 20 Then, the coil spring assembly jig 1 is removed, a bolt (not shown) is inserted into the motor assembly bolt hole 26, and the motor cover 21 is fixed to the motor body 20.

  In this manner, by assembling the brake-equipped hydraulic motor using the coil spring assembly jig 1, it is possible to prevent the plurality of compression coil springs 25 from dropping when the brake-equipped hydraulic motor is assembled. The coil spring assembling jig 1 can be reused for assembling other hydraulic motors with brakes.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications may be made to the specific structure within the scope of the present invention. Nor.

1 is a perspective view of a coil spring assembling jig according to an embodiment of the present invention. It is a figure which shows the state which assembled | attached the coil spring assembly | attachment jig | tool which concerns on embodiment of this invention to the casing of a motor. FIG. 3 is a partially enlarged sectional view of FIG. 2. It is sectional drawing which shows an example of the conventional hydraulic motor with a brake. It is a figure which shows the conventional coil spring assembly | attaching method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Coil spring assembly jig | tool 2 Spring holding plate 3 Jig assembly rear plate 4 Jig assembly side plate 5 Fixing bolt insertion hole 6 Fixing bolt insertion hole 7 Spring holding recessed part 8 Positioning pin inserting recessed part 9 Handle 9
DESCRIPTION OF SYMBOLS 12 Motor cover holding plate 13 Rear plate for jig assembly 14 Side plate for jig assembly 15 Fixed bolt insertion long hole 16 Fixed bolt insertion long hole 17 Recessed portion for motor casing fitting 18 Connection means 19 Jig fixing means 20 Motor body (casing)
21 Motor cover (casing)
23 annular groove 24 spring insertion hole 25 compression coil spring 26 motor assembly bolt hole 27 positioning pin 30 shaft 31 piston 32 cylinder barrel 33 brake device 34 brake piston 35 friction plate 36 swash plate 37 reduction gear 38 motor gear casing 39 sprocket 40 endless Crawler belt 90 Annular cage 91 Hole 92 Grease

Claims (4)

  A spring holding plate having a spring holding recess at one end, a motor cover holding plate, a connecting means for connecting the other end of the spring holding plate and the other end of the motor cover holding plate, the spring holding plate, A coil spring assembling jig comprising jig fixing means for holding the motor cover holding plate at a predetermined interval.   A motor body including a brake and a motor; a motor cover that covers one end of the motor body and has a plurality of brake spring insertion holes; and a brake cover that is inserted into each of the plurality of spring insertion holes. In a coil spring assembling jig used for assembling a brake-equipped hydraulic motor having a plurality of compression coil springs, a spring holding plate having a spring holding recess at one end, a motor cover holding plate, and the spring holding A connecting means for connecting the other end of the plate and the other end of the motor cover holding plate; and a jig fixing means for holding the spring holding plate and the motor cover holding plate at a predetermined interval. Coil spring assembly jig.   In a method of assembling a brake-equipped hydraulic motor comprising a motor body including a brake and a motor, and a motor cover that covers one end of the motor body and is provided with a plurality of spring insertion holes for brakes. A plurality of compression coil springs for brakes are inserted into the spring insertion holes, and a coil spring assembling jig having a spring holding plate having a spring holding recess at one end and a motor cover holding plate is fixed to the motor cover. Then, after holding the plurality of compression coil springs in the spring holding recess, the motor cover on which the plurality of compression coil springs are assembled is pressed against the motor body together with the coil spring assembly jig. Removing the coil spring assembly jig, and fixing the motor cover to the motor body. How to put. A motor body including a brake and a motor; a motor cover which covers one end of the motor body and has a plurality of spring insertion holes for brakes; and a speed reducer connected to a shaft at the other end of the motor body; A brake-equipped hydraulic motor including a motor gear casing coupled to the speed reducer and rotatably provided on an outer periphery of the motor body; and an endless crawler sprocket fixed to the motor gear casing. In the attaching method, a plurality of compression coil springs for braking are respectively inserted into the plurality of spring insertion holes, and a spring holding plate having a spring holding recess at one end and a motor cover holding plate are connected by a connecting means. The coil spring assembly jig is fixed around the motor cover by jig fixing means, and all of the plurality of compression coil springs are held by the spring. After being held in the recess, the motor cover on which the plurality of compression coil springs are assembled is pressed against the motor body together with the coil spring assembly jig, and the coil spring assembly jig is removed, and the motor A method of assembling a hydraulic motor with a brake, wherein a cover is fixed to the motor body.

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