JP2018080001A - Workpiece lifting tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a workpiece lifting tool capable of reducing heavy work, increasing work safety, and reducing the possibility of damaging a workpiece.SOLUTION: A workpiece lifting tool 1 for lifting a workpiece 2 is provided. The workpiece has a first hole 8L and a second hole 8R opposed to each other at one end and the other end in a horizontal axis C direction. The workpiece lifting tool is provided with: a base part 11; a first insertion part 12L and a second insertion part 12R that are configured to be supported on the base part so as to be relatively movable in an axial direction and respectively inserted into the first hole and the second hole; and a link mechanism 13 that is configured to be connected to the first insertion part and the second insertion part and elongated/contracted in a vertical direction so as to move the first insertion part and the second insertion part to get close to or away from each other.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a workpiece lifting tool for lifting a workpiece.

  In the vehicle assembly process, there is a process of assembling a differential assembly, which is a component of the final reduction gear, into the housing. At this time, generally, a differential assembly as a work that has been assembled is transported from the assembly position to another place where the housing stands by, and the differential assembly is assembled in the housing at the other place.

JP 09-278348 A

  In general, the conveyance of the differential assembly is performed manually by an operator. The reason is mainly a reduction in cycle time. However, such work is a heavy muscle work, and there is a problem in terms of safety because there is a concern about pinching of fingers. The differential assembly can also be damaged by being dropped and struck.

  Therefore, the present invention has been created in view of such circumstances, and an object thereof is to provide a work hanging tool that can reduce heavy muscle work, increase work safety, and reduce the possibility of work damage. There is.

According to one aspect of the invention,
A work lifting tool for lifting a work,
The workpiece has a first hole and a second hole facing in opposite directions on one end side and the other end side in a horizontal axial direction;
The work hanging tool is
The base,
A first insertion portion and a second insertion portion that are supported by the base and are relatively movable in the axial direction and configured to be inserted into the first hole and the second hole, respectively;
A link mechanism connected to the first insertion portion and the second insertion portion and configured to extend and contract in the vertical direction to move the first insertion portion and the second insertion portion closer to and away from each other;
There is provided a work hanging tool characterized by comprising:

Preferably, each of the first hole and the second hole is a hole having a circular cross section,
Each of the first insertion portion and the second insertion portion has a circular outer peripheral surface having an outer diameter adapted to the first hole and the second hole, respectively.

Preferably, the base has a fixed frame, and a movable frame provided on the fixed frame so as to be axially slidable.
The first insertion portion is fixed to the fixed frame, and the second insertion portion is fixed to the movable frame.

  Preferably, the base has a guide rod extending from the fixed frame toward the other end in the axial direction, and the movable frame has a bearing through which the guide rod is inserted.

  Preferably, the workpiece suspension further includes a restriction element that restricts relative rotation of the guide rod and the bearing.

  Preferably, the workpiece is a differential assembly of a vehicle, and the first hole and the second hole are shaft insertion holes that are formed in a differential case of the differential assembly and through which an axle shaft is inserted.

  ADVANTAGE OF THE INVENTION According to this invention, while reducing heavy muscle work, the safety | security of work can be improved and the workpiece | work hanging tool which can reduce possibility that a workpiece | work will be damaged can be provided.

It is a front view showing a work hanging tool and a work. It is a front sectional view showing a work hanging tool and a work. It is a perspective view showing a work hanging tool and a work. It is a perspective view for demonstrating the usage method of a work hanging tool. It is a perspective view for demonstrating the usage method of a work hanging tool. It is a perspective view for demonstrating the usage method of a work hanging tool.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1 shows a workpiece lifting tool 1 according to this embodiment and a workpiece that is a lifting target. FIG. 2 shows their cross-sectional structure and FIG. 3 shows them in perspective view. FIG. 1 shows a state before lifting, and FIGS. 2 and 3 show a state after lifting.

  For convenience, the front, rear, left, right, and top directions are defined as shown in FIG. However, it should be noted that the front, rear, left, and right directions are merely defined for convenience of explanation. For example, the left side of FIG. The left-right direction coincides with the left-right direction of the vehicle on which the differential assembly 2 that is the workpiece of this embodiment is to be mounted. However, the left-right direction here does not need to correspond with the left-right direction of a vehicle, and may be reverse.

  The vehicle is a large vehicle such as a truck. However, the vehicle is not limited to a large vehicle, and may be a small vehicle such as a passenger car. The differential assembly 2 is a component part of a vehicle final reduction gear.

  As shown in FIG. 2, the differential assembly 2 has a well-known structure, and includes a differential case 3, a large-diameter ring gear 4 fixed to the outer periphery of the differential case 3, and a pair fixed in the differential case 3. Pinion shafts 5 and 5, differential pinion gears 6 and 6 rotatably attached to the pinion shafts 5 and 5, and left and right gears rotatably supported in the differential case 3 and meshed with the differential pinion gears 6 and 6. It has side gears 7L and 7R. Although not shown, in a vehicle-mounted state, the ring gear 4 meshes with a pinion gear provided at the rear end portion of the propeller shaft, and the rotational driving force from the engine is input. Left and right axle shafts (not shown) are connected to the left and right side gears 7L and 7R, so that the engine driving force is distributed and transmitted to the left and right axle shafts and thus to the driving wheels.

  On the same axis as the left and right side gears 7L and 7R, the differential case 3 is provided with left and right shaft insertion holes 8L and 8R for inserting the left and right axle shafts. These shaft insertion holes 8L and 8R are coaxial with the hole axis C. Therefore, the left and right side gears 7L and 7R are also coaxial with the hole axis C. In the following description, unless otherwise specified, when referring to the axial direction, the circumferential direction, and the radial direction, these refer to the axial direction, the circumferential direction, and the radial direction with respect to the hole axis C.

  In the state before the lifting shown in FIG. 1, the differential assembly 2 is supported by a support base (not shown) so that the hole axis C is horizontal at the assembly location. Accordingly, the differential assembly 2 includes a left shaft insertion hole 8L as a first hole facing the opposite direction (left side and right side) on one end side (left side) and the other end side (right side) in the horizontal axial direction, and the second hole. And the right shaft insertion hole 8R.

  Here, horizontal means substantially horizontal or substantially horizontal, and includes not only accurate horizontal but also a state slightly inclined from accurate horizontal.

  In the present embodiment, the left and right shaft insertion holes 8L and 8R are holes each having a circular cross section. On the radially outer side of the shaft insertion holes 8L and 8R, flanges 9L and 9R for fixing a shaft case for housing the axle shaft are fixed to the differential case 3.

  The work hanging tool 1 is connected to the base 11, the left pin member 12L and the right pin member 12R as the first insertion portion and the second insertion portion supported by the base 11, and the left pin member 12L and the right pin member 12R. The link mechanism 13 is provided. The left pin member 12L and the right pin member 12R are relatively movable in the axial direction, and are configured to be inserted into the left and right shaft insertion holes 8L and 8R, respectively. The link mechanism 13 is configured to expand and contract in the vertical direction or the vertical direction to move the left pin member 12L and the right pin member 12R close to and away from each other.

  The base 11 includes a fixed frame 14 and a movable frame 15 provided on the fixed frame 14 so as to be axially slidable. The fixed frame 14 includes a rectangular top plate 16 that is horizontally disposed and extends in the left-right direction, a substantially triangular front plate 17 and a rear plate 18 fixed to front and rear ends of the top plate 16, and a front plate 17 and a rear plate 18. The left arm 19 is fixed to the left end and extends downward. The left arm 19 is also formed of a plate-like member, such as a metal plate. Each fixing portion is fixed by an appropriate fixing method such as bolting or welding. The same applies to each fixing portion described later unless otherwise specified.

  The movable frame 15 includes a portal frame 20 slidably disposed on the top plate 16. The portal frame 20 includes a movable top plate 21 slidably mounted on the top plate 16, a substantially triangular movable front plate 22 and a movable rear plate 23 that are fixed to the front and rear ends of the movable top plate 21 and extend downward. It is comprised integrally from. The distance between the movable front plate 22 and the movable rear plate 23 is substantially equal to the front-rear width of the top plate 16, so that the movable front plate 22 and the movable rear plate 23 sandwich the top plate 16. When sliding, the movable front plate 22 and the movable rear plate 23 may also be in sliding contact with the front and rear end surfaces of the top plate 16 to guide the sliding movement of the portal frame 20 in the axial direction. Thus, the portal frame 20 is disposed on the fixed frame 14 so as to be axially slidable.

  The movable frame 15 also includes a right arm 24 that is fixed and extends downward while being sandwiched between the right ends of the movable front plate 22 and the movable rear plate 23. That is, the movable frame 15 is configured integrally with the portal frame 20 and the right arm 24. The right arm 24 is also formed of a plate-like member, for example, a metal plate. A slight gap is provided between the right arm 24 and the top plate 16 so as not to hinder the sliding of the movable frame 15.

  In order to accurately guide the sliding movement of the movable frame 15 with respect to the fixed frame 14, the fixed frame 14 is provided with a guide rod 25 that extends to the right side and is disposed horizontally. The movable frame 15 is provided with a bearing 26 through which the guide rod 25 is slidably inserted in the axial direction. The guide rod 25 and the bearing 26 are arranged at a height position below the top plate 16 and above the differential assembly 2 when lifted.

  Regarding the attachment of the guide rod 25, the fixed frame 14 is provided with a guide rod support plate 27. The guide rod support plate 27 is fixed to the lower surface of the top plate 16 and the inner surfaces of the front plate 17 and the rear plate 18. The base end portion or the left end portion of the guide rod 25 is inserted into the guide rod insertion hole 28 of the guide rod support plate 27. A mounting bracket 30 having a guide rod insertion hole 29 is also fixed to the left side surface of the guide rod support plate 27. The left end portion of the guide rod 25 that protrudes to the left from the guide rod support plate 27 is inserted into the guide rod insertion hole 29 and fixed to the mounting bracket 30 by a coaxial bolt 31. Thereby, the left end portion of the guide rod 25 is fixed to the fixed frame 14.

  In the case of this embodiment, the bearing 26 is a tubular slide bearing. The bearing 26 has a flange 32 protruding outward at the right end thereof. The bearing 26 is inserted into the bearing mounting hole 33 of the right arm 24 from the right side until the flange 32 hits the right arm 24. By fixing the flange 32 to the right arm 24, the bearing 26 is fixed to the movable frame 15. The bearing 26 may be a bearing other than a slide bearing.

  In particular, in the case of this embodiment, a restricting element that restricts the relative rotation of the guide rod 25 and the bearing 26 is provided. Thereby, it is possible to prevent the movable frame 15 from rotating around the axis of the guide rod 25 when the movable frame 15 is slid, and to guide the slide movement of the movable frame 15 more accurately.

  In the present embodiment, the restriction element is a spline. That is, a plurality of spline grooves 34 extending in the axial direction are formed on the outer peripheral surface of the guide rod 25, and a plurality of spline protrusions 26 </ b> A that are fitted into the spline grooves 34 are formed on the inner peripheral surface of the bearing 26. . Note that the relationship between the spline groove and the spline protrusion may be reversed. The spline groove 34 is formed over substantially the entire length of the guide rod 25. A plurality of spline protrusions 28 </ b> A that fit into the spline grooves 34 are also formed on the inner peripheral surface of the guide rod insertion hole 28 of the guide rod support plate 27 at the mounting portion of the guide rod 25. Thereby, also in the attachment part of the guide rod 25, rotation prevention is made | formed and the attachment of the guide rod 25 can be made stronger.

  The restricting element may be formed from something other than a spline, for example, a key and a key groove.

  Operation rods 35L and 35R, which are operation members that protrude outward in the left-right direction, are fixed to the left arm 19 and the right arm 24, respectively. The operating rods 35L and 35R are portions that are gripped by the operator when the relative movement of the fixed frame 14 and the movable frame 15 is performed, that is, when the left arm 19 and the right arm 24 are manually opened and closed (described in detail later). It is.

  In the case of this embodiment, the operating rods 35L and 35R are made of tubular members arranged horizontally. The operation rods 35L and 35R are fixed by fixing the flanges 36L and 36R at the base ends of the operation rods 35L and 35R to the left arm 19 and the right arm 24, respectively. The operation member can be arbitrarily deformed, and for example, a portion extending in the vertical direction may be provided so that a force in the opening / closing direction can be more easily applied during the opening / closing operation.

  The left pin member 12L and the right pin member 12R are provided at the lower ends of the left arm 19 and the right arm 24, respectively. The configurations of the left pin member 12L and the right pin member 12R are the same except that they are bilaterally symmetric. Therefore, only the left side will be described in detail below.

  The left pin member 12 </ b> L generally has a form protruding from the left arm 19 toward the left and right center side (right side) of the workpiece suspension 1. In the case of this embodiment, the left pin member 12L has a divided assembly structure. However, it is also possible to configure the left pin member 12L as an integral product.

  The left pin member 12L includes a pin main body 42L inserted into the pin insertion hole 41L of the left arm 19, a pin sleeve 43L fitted to the outside of the pin main body 42L, and a pin sleeve 43L for fixing the pin sleeve 43L to the pin main body 42L. The fixing plate 44L is mainly provided. The pin body 42L, the pin sleeve 43L, and the fixing plate 44L each have a circular cross-sectional shape and are arranged coaxially.

  The pin main body 42L is inserted into the pin insertion hole 41L from the left side, and the flange 45L at the base end thereof is fixed to the left arm 19 by a plurality of (four in this embodiment) bolts 46, whereby the left arm 19 Fixed to.

  The pin sleeve 43L is fitted to the outside of the portion of the pin body 42L that protrudes rightward from the pin insertion hole 41L. The fixing plate 44L is superimposed on the right end surfaces of the pin main body 42L and the pin sleeve 43L, and is fixed to the pin main body 42L by a plurality (four in this embodiment) of bolts 47. Accordingly, the pin sleeve 43L is sandwiched and fixed between the left arm 19 and the fixing plate 44L. In order to more firmly and accurately fix the pin sleeve 43L, the fixing plate 44L may be fitted in the pin sleeve 43L with an inlay.

  The fixing plate 44L has an outer diameter equal to or smaller than that of the pin sleeve 43L, and does not interfere with the left shaft insertion hole 8L when the left pin member 12L is inserted into the left shaft insertion hole 8L. At the base end of the pin sleeve 43L, a protruding portion that protrudes outward in the radial direction, specifically, a circular flange 48L is provided. The flange 48L has a larger diameter than the left shaft insertion hole 8L. When the flange 48L is lifted as shown in FIG. 2, the flange 48L abuts on a peripheral portion of the left shaft insertion hole 8L in the differential case 3, and is sandwiched between the peripheral portion and the left arm 19 to hold the differential case 3 and the flange 9L. Separate from the left arm 19. As a result, the differential case 3 and the flange 9L can be prevented from being damaged during lifting.

  In particular, the left shaft insertion hole 8L is a circular hole having an inner diameter D, while the pin sleeve 43L has an outer peripheral surface having a circular cross section having an outer diameter d adapted to the left shaft insertion hole 8L. Here, “the outer diameter d suitable for the left shaft insertion hole 8L” is an appropriate degree that the fit between the pin sleeve 43L and the left shaft insertion hole 8L is not too loose or too tight, and the left shaft The outer diameter d is such that the pin sleeve 43L can be smoothly inserted into and removed from the insertion hole 8L. Accordingly, the left pin member 12L can be smoothly inserted into and removed from the left shaft insertion hole 8L, and the looseness of the fitting portion between the two can be minimized during lifting, and stable lifting can be performed. .

  Further, in the present embodiment, the left pin member 12L has a divided assembly structure. Therefore, when lifting different types of differential assemblies 2 having different inner diameters D of the left shaft insertion holes 8L, pins having an outer diameter d suitable for the inner diameter D are used. The sleeve 43L can be exchanged. Thereby, it is possible to share the work hanging tool 1 with respect to various different types of differential assemblies 2, and the cost can be reduced. The pin sleeve 43 can be easily replaced when worn.

  The right pin member 12R and related parts thereof are not described by changing the suffix of the reference sign to “R” in the drawing. The “left side” of the names of the above-described parts is replaced with “right side”.

  Thus, the left and right pin members 12L and 12R are arranged so as to face the left and right central sides of the work suspension 1 so as to face each other and to face the left and right shaft insertion holes 8L and 8R. In addition, when the work hanging tool 1 is arranged so that the top plate 16 is parallel to the hole axis C as shown in FIG. 1, the left and right pin members 12L, 12R are arranged coaxially with the hole axis C and are mutually Arranged at the same height.

  The link mechanism 13 includes a raising / lowering arm 51 provided on the fixed frame 14 so as to be rotatable and capable of raising / lowering, and a connecting arm 52 that connects the raising / lowering arm 51 and the movable frame 15.

  An arm support bracket 53 is fixed to the upper surface of the top plate 16 of the fixed frame 14, and a lower end portion of the raising / lowering arm 51 is rotatably connected to the arm support bracket 53 by a pin 54. At the upper end portion of the raising / lowering arm 51, a ring-shaped locking portion 55 on which a wire hook of a lifting and conveying machine (not shown) is hooked is formed. The hoisting and conveying machine is made of, for example, a crane, a hoist, or an air balancer, and in the present embodiment, is made of an air balancer. An air balancer is a device having a function of manually adjusting the height of a suspended load by using air pressure, in addition to a function of lifting and lowering and conveying a suspended load like a crane or a hoist.

  An arm connection bracket 56 is provided on the upper surface of the movable top plate 21 of the movable frame 15, and a lower end portion of the connecting arm 52 is rotatably connected to the arm connection bracket 56 by a pin 57. The connecting arm 52 extends obliquely upward to the left from the lower end portion thereof, and the upper end portion of the connecting arm 52 is pivotally connected to the intermediate portion of the raising / lowering arm 51 by a pin 58.

  According to this configuration, when the raising / lowering arm 51 is moved to the lying position as shown in FIG. 1, the raising / lowering arm 51 pushes the movable frame 15 to the right side via the connecting arm 52, and the movable frame 15 is moved to the pin. The members 12L and 12R are slid to the right, which is the separating direction. As a result, the left arm 19 and the right arm 24, and thus the left and right pin members 12L and 12R, are opened, and the left and right pin members 12L and 12R can be inserted into the left and right shaft insertion holes 8L and 8R, in other words, The left and right pin members 12L and 12R come out of the left and right shaft insertion holes 8L and 8R, respectively.

  In order to limit the sliding amount of the movable frame 15 at this time, a stopper 59 is fixed to the upper surface of the right end of the top plate 16. In this embodiment, the stopper 59 is formed of a rectangular parallelepiped block, and has a front-rear width equal to the top plate 16 and a left-right width shorter than that. The stopper 59 can prevent the movable frame 15 from being detached from the fixed frame 14. The guide rod 25 is provided with a sufficient extra length so that the bearing 26 does not come out of the guide rod 25 even when the movable frame 15 hits the stopper 59.

  On the other hand, when the raising / lowering arm 51 is moved to the standing position as shown in FIG. 2, the raising / lowering arm 51 pulls the movable frame 15 to the left side via the connecting arm 52, and the movable frame 15 is moved to the pin members 12L, 12R. Slide to the left, which is the close direction. As a result, the left arm 19 and the right arm 24, and thus the left and right pin members 12L and 12R are closed, and the left and right pin members 12L and 12R are inserted into the left and right shaft insertion holes 8L and 8R.

  In this way, the link mechanism 13 moves the left pin member 12L and the right pin member 12R close to each other when the elevating arm 51 is moved to the upright position, and the elevating arm 51 falls down. When the contraction operation in the vertical direction moved to the position is performed, the left pin member 12L and the right pin member 12R are configured to move apart.

  In the case of the present embodiment, the link mechanism 13 is connected to the left pin member 12L via the fixed frame 14, and is connected to the right pin member 12R via the movable frame 15.

  Next, the usage method of the work hanging tool 1 of this embodiment is demonstrated.

  As shown in FIG. 1 in the initial state, the differential assembly 2 is horizontally supported by a support base (not shown) at the assembly location. On the other hand, although not shown, the wire hook of the lifting conveyor is hooked on the locking portion 55 of the workpiece suspension 1, and the workpiece suspension 1 is suspended and supported by the lifting conveyor above the differential assembly 2. .

  The workpiece suspension 1 is lowered so as to approach the differential assembly 2. When the work lifting tool 1 is sufficiently close, the operator grasps the operation rods 35L and 35R and manually moves the fixed frame 14 and the movable frame 15 in the separating direction, and the left arm 19 and the right arm 24, and thus the left and right The pin members 12L and 12R are opened, and the left and right pin members 12L and 12R are set in an insertion standby state. And the workpiece hanger 1 is made into an open state.

  Next, while adjusting the positions of the left and right pin members 12L and 12R to the positions of the left and right shaft insertion holes 8L and 8R, the left and right pin members 12L and 12R are moved to the left and right shaft insertion holes 8L and 8R as shown in FIG. Insert it. At this time, the operator grasps the operating rods 35L and 35R, manually moves the fixed frame 14 and the movable frame 15 in the proximity direction, and closes the left arm 19 and the right arm 24, and thus the left and right pin members 12L and 12R, The left and right pin members 12L, 12R are inserted into the left and right shaft insertion holes 8L, 8R. And the workpiece hanger 1 is made into a closed state. In addition, since it can also be made into a closed state also by the movement to the standing position of the raising / lowering arm 51, you may insert by using this movement together. This movement can be performed, for example, by raising the wire hook of the lifting conveyor.

  Next, when the wire hook is further raised, the left arm 19 and the right arm 24 try to be further closed while the left and right pin members 12L and 12R are inserted. As a result, the differential assembly 2 is completely clamped between the left arm 19 and the right arm 24 and is securely held by the workpiece suspension 1.

  When the wire hook is further raised, the workpiece suspension 1 is also raised, and the differential assembly 2 is separated from the support base and floats in the air while maintaining a horizontal state. At this time, the raising / lowering arm 51 further tends to stand up due to the weight of the work hanging tool 1 and the differential assembly 2. As a result, the clamping force is increased, and the differential assembly 2 is safely and reliably held on the workpiece suspension 1.

  At this time, since the position of the locking portion 55 is set so that the center of gravity G (see FIG. 2) of the differential assembly 2 is located almost directly below the locking portion 55, the differential assembly 2 is in a horizontal state without being inclined. The workpiece suspension 1 is stably lifted while keeping

  In this state, the lifting conveyor is moved horizontally, and the differential assembly 2 is moved to a position just above the assembly location where the differential assembly 2 is assembled. Then, the wire hook is lowered, and the differential assembly 2 is lowered toward the assembly location.

  As shown in FIG. 3, the differential housing half 60, which is the assembly counterpart of the differential assembly 2, is waiting at the assembly location. The half body 60 is supported by a support base (not shown) with its opening 61 facing upward. The half 60 has left and right receiving surfaces 62L and 62R that are upward and semi-cylindrical in the opening 61 thereof. The flanges 9L and 9R of the differential assembly 2 are expected to be placed on the receiving surfaces 62L and 62R.

  In a state where the flanges 9L and 9R are positioned at positions just above the receiving surfaces 62L and 62R, the wire hook and thus the differential assembly 2 are lowered. Then, as shown in FIG. 4, when the flanges 9L and 9R are seated on the receiving surfaces 62L and 62R, the wire hook is further lowered to release the clamping force.

  Next, the operator holds the operation rods 35L and 35R and operates the workpiece suspension 1 in the open state. Then, the left and right pin members 12L, 12R are extracted from the left and right shaft insertion holes 8L, 8R, and the workpiece suspension 1 is removed from the differential assembly 2. The wire hook is raised while maintaining this open state, and the workpiece suspension 1 is retracted to an appropriate height position. FIG. 5 shows the state of the differential assembly 2 and the half 60 after the retraction.

  As shown in FIG. 5, the half body 60 is provided with cap joint surfaces 66L and 66R and bolt holes 63 at adjacent positions on both front and rear sides of the receiving surfaces 62L and 62R. As shown in FIG. 6, caps 64L and 64R having downward and semi-cylindrical receiving surfaces (not shown) are put on the upper half portions of the flanges 9L and 9R protruding upward from the receiving surfaces 62L and 62R. . At this time, the caps 64L and 64R are seated on and joined to the cap joint surfaces 66L and 66R. Bolts 65 are inserted from above into bolt insertion holes (not shown) of the caps 64 </ b> L and 64 </ b> R, and the bolts 65 are tightened into the female screws of the bolt holes 63, whereby the caps 64 </ b> L and 64 </ b> R are fixed to the half body 60. . Thereby, the flanges 9L and 9R are sandwiched and fixed between the upper and lower receiving surfaces, and the assembly of the differential assembly 2 is completed. Thereafter, other parts such as an axle shaft are assembled to the differential assembly 2. Then, another half of the differential housing is assembled to the half 60 to complete the differential housing.

  As described above, according to the present embodiment, the differential assembly 2 can be easily and reliably transported from the assembly location to another assembly location using the workpiece suspension 1. Therefore, conveyance by a worker's manual work can be avoided, heavy muscle work can be reduced, work safety can be improved, and the possibility that the differential assembly 2 is damaged can be reduced. Attachment and removal of the workpiece suspension 1 to and from the differential assembly 2 can be quickly performed by the above-described easy and simple operation. Therefore, adverse effects on the cycle time can be avoided, and conveyance can be performed in a short cycle time. At the time of assembly, the differential assembly 2 can be lowered while being suspended by the work suspension 1 and can be seated on the half body 60. Therefore, there is no worry about pinching of fingers, which is a concern when it is performed manually, and safety can be improved.

  Although the embodiments of the present invention have been described in detail above, various other embodiments of the present invention are possible.

  (1) For example, the left and right shaft insertion holes 8L and 8R may not be coaxial with each other, and may be arranged at different heights, for example. Therefore, in accordance with this, the left and right pin members 12L and 12R may not be coaxial with each other, and may be arranged at different heights, for example.

  (2) The link mechanism 13 may be formed by a pantograph mechanism that can expand and contract in the vertical direction.

  (3) The workpiece may be other than the differential assembly 2.

  (4) In the above-described embodiment, a so-called single-open configuration in which only the right pin member 12R is movable with respect to the fixed-side left pin member 12L is shown. However, it can be modified to a so-called double-open configuration. In this case, for example, the left arm 19 may be slidable in the axial direction with respect to the top plate 16 of the base 11.

  The embodiment of the present invention is not limited to the above-described embodiment, and includes all modifications, applications, and equivalents included in the concept of the present invention defined by the claims. Therefore, the present invention should not be construed as being limited, and can be applied to any other technique belonging to the scope of the idea of the present invention.

1 Work Lifter 2 Differential Assembly 3 Differential Case 8L Left Shaft Insertion Hole 8R Right Shaft Insertion Hole 11 Base 12L Left Pin Member 12R Right Pin Member 13 Link Mechanism 14 Fixed Frame 15 Movable Frame 25 Guide Rod 26 Bearing 26A Spline Projection 34 Spline Groove C Hole shaft d Outer diameter

Claims (6)

A work lifting tool for lifting a work,
The workpiece has a first hole and a second hole facing in opposite directions on one end side and the other end side in a horizontal axial direction;
The work hanging tool is
The base,
A first insertion portion and a second insertion portion that are supported by the base and are relatively movable in the axial direction and configured to be inserted into the first hole and the second hole, respectively;
A link mechanism connected to the first insertion portion and the second insertion portion and configured to extend and contract in the vertical direction to move the first insertion portion and the second insertion portion closer to and away from each other;
A workpiece hanging tool characterized by comprising: The first hole and the second hole are holes each having a circular section,
The workpiece suspension according to claim 1, wherein the first insertion portion and the second insertion portion each have a circular outer peripheral surface having an outer diameter adapted to the first hole and the second hole, respectively. Ingredients. The base has a fixed frame and a movable frame provided on the fixed frame so as to be axially slidable;
The work hanging tool according to claim 1 or 2, wherein the first insertion portion is fixed to the fixed frame, and the second insertion portion is fixed to the movable frame. The workpiece lifting tool according to claim 3, wherein the base has a guide rod extending from the fixed frame toward the other axial end, and the movable frame has a bearing through which the guide rod is inserted. . The work hanging tool according to claim 4, further comprising a regulating element that regulates relative rotation between the guide rod and the bearing. The workpiece is a differential assembly of a vehicle, and the first hole and the second hole are shaft insertion holes formed in a differential case of the differential assembly for allowing an axle shaft to pass therethrough. The work hanging tool according to any one of 1 to 5.

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