WO2019114680A1

WO2019114680A1 - Clamping apparatus for slicing machine

Info

Publication number: WO2019114680A1
Application number: PCT/CN2018/120216
Authority: WO
Inventors: 周刚
Original assignee: 徕卡显微系统(上海)有限公司
Priority date: 2017-12-15
Filing date: 2018-12-11
Publication date: 2019-06-20
Also published as: CN207593622U

Abstract

Disclosed is a clamping apparatus for a slicing machine. The clamping apparatus comprises: a base, the base being provided with a non-threaded hole, and a threaded hole which intersects the non-threaded hole; a clamping piece, the clamping piece being movably arranged in the non-threaded hole, a first end of the clamping piece extending out from the non-threaded hole, a second end of the clamping piece being located within the non-threaded hole, a position on the clamping piece near to the second end being provided with a conical hole, the axis of the conical hole being perpendicular to the movement direction of the clamping piece; a first elastic piece, the first elastic piece being arranged within the non-threaded hole, the clamping piece being supported on the first elastic piece; a core shaft, an outer surface of the core shaft being provided with a thread for threaded matching and movement within the threaded hole, a first end of the core shaft being located within the base and having a conical shape so as to be suitable for being inserted into the conical hole, a second end of the core shaft being located outside the base; a driving piece, the driving piece being sleeved on the core shaft and located outside the base; a one-way clutch, the one-way clutch being sleeved on the core shaft and being connected to the driving piece so as to move with the driving piece in a synchronised manner.

Description

Clamping device for a microtome

Technical field

The present disclosure relates to the field of microscopy, and in particular to a clamping device for a microtome.

Background technique

Rotary microtome in the prior art typically uses an eccentric bolt to hold the tool holder. The user can drive the lever connected to the eccentric bolt to rotate the eccentric bolt to secure the tool holder.

However, when different users or the same user drive the levers different times, the eccentric bolts will fix the tool holders with different pressures. At the same time, there is a risk of wear on the friction surfaces used to secure the tool holder. For example, when the force of the user driving the lever is too large, the friction surface for fixing the tool holder may be damaged, which will result in loss of function for fixing the tool holder.

Summary of the invention

The present disclosure aims to solve at least one of the technical problems in the related art to some extent. To this end, it is an object of the present disclosure to provide a gripping device for a microtome that can ensure a consistent grip force and avoid damage to the gripping device caused by excessive force of the user.

A clamping device according to an embodiment of the first aspect of the present disclosure, comprising: a base having a non-threaded hole and a threaded hole intersecting the non-threaded hole; and a clamping member movably disposed in the non-threaded hole And configured to clamp the member to be fixed while moving in the first direction and release the member to be fixed when moving in the second direction opposite to the first direction, the first end of the clamping member extending from the non-threaded hole, a second end of the clamping member is located in the non-threaded hole and the clamping member has a tapered hole at a position near the second end thereof, the axis of the tapered hole being perpendicular to the first direction; the first elastic member, the first elastic member is disposed at In the non-threaded hole, the clamping member is supported on the first elastic member; the mandrel and the outer surface of the mandrel are threaded to be threaded in the threaded hole and movable in the threaded hole, and the first end of the mandrel is located at the base The seat has a tapered shape for inserting into the tapered hole, the second end of the mandrel is located outside the base; the driving member, the driving member is sleeved on the mandrel and located outside the base, and the driving member can The predetermined fastening force is fixed to the mandrel to drive the mandrel to rotate, and Disengaging from the mandrel to stop driving the mandrel when the clamping member clamps the member to be fixed with a predetermined clamping force corresponding to the predetermined fastening force; and the one-way clutch, the one-way clutch is sleeved on the mandrel and Connected to the driving member for synchronous movement with the driving member, the one-way clutch being configured not to be locked with the mandrel in a first rotational direction of the mandrel for clamping the member to be fixed, and Locking with the mandrel in a second direction of rotation of the mandrel for releasing the member to be fixed.

In the clamping device according to an embodiment of the present disclosure, the driving member can be sleeved on the mandrel with a predetermined fastening force, so that the user can operate the driving member to drive the mandrel to rotate, and the rotating mandrel passes through the tapered end thereof The cooperation between the tapered holes of the clamping member causes the clamping member to move, thereby clamping the member to be fixed with a gradually increasing clamping force. When the gripping member holds the member to be fixed with a predetermined clamping force, if the user continues to operate the driving member, the driving member can be disengaged from the mandrel to stop the driving mandrel from rotating, thereby preventing the gripping member from being to be fixed between the members to be fixed. The force continues to increase and damages the clamp or the component to be fixed. In addition, by presetting the fastening force between the driving member and the mandrel, different users or the same user can only hold the member to be fixed at a predetermined clamping force corresponding to the predetermined fastening force at different times. This ensures the consistency of the clamping force.

In addition, the gripping device according to the above embodiment of the present disclosure may also have the following additional technical features.

In an embodiment of the present disclosure, the second end of the clamping member is provided with a groove, one end of the first elastic member is disposed in the groove, and the other end of the first elastic member abuts against the defined non-thread in the base On the bottom wall of the hole.

In an embodiment of the present disclosure, the driving member includes: a knob, the knob is annular and sleeved on the mandrel, the knob has a receiving hole extending along a radial direction thereof, and the mandrel has a supporting hole corresponding to the receiving hole of the knob; An adjusting member movably received in the receiving hole; a ball, the ball being located in the receiving hole and disposed at the supporting hole, the diameter of the ball being larger than the diameter of the supporting hole, so that the ball can be supported on the supporting hole And a second elastic member disposed in the receiving hole between the adjusting member and the ball and configured to press the ball against the supporting hole.

In an embodiment of the present disclosure, the receiving hole is a threaded hole, and the adjusting member is a bolt, and the bolt thread is fitted in the threaded hole and movable along the threaded hole.

In an embodiment of the present disclosure, the knob includes a plurality of receiving holes arranged along a circumferential direction thereof, and the mandrel has a plurality of supporting holes, and the plurality of supporting holes are in one-to-one correspondence with the plurality of receiving holes.

In an embodiment of the present disclosure, the receiving hole is a through hole, and the supporting hole is a blind hole.

In an embodiment of the present disclosure, the one-way clutch includes: an outer ring sleeved on the mandrel, the inner wall of the outer ring having a groove extending along a circumferential direction thereof; and a roller, the roller being rollably received in the concave a third elastic member disposed in the groove, the third elastic member having one end adapted to abut against the roller, and the other end of the third elastic member being adapted to be coupled to the side defining the groove wall.

In an embodiment of the present disclosure, a side of the outer ring adjacent to the driving member is provided with a protrusion, and a side of the driving member adjacent to the outer ring is provided with a notch corresponding to the protrusion, and the protrusion fits in the notch.

In an embodiment of the present disclosure, wherein the protrusions are plural and are arranged along the circumferential direction of the outer ring, the notches are also plural and correspond one-to-one with the plurality of protrusions.

In an embodiment of the present disclosure, the first end of the clamping member passes through the member to be fixed and is provided with a flange which is arranged on the member to be fixed so that the member to be fixed can be clamped at the flange Between the base and the base.

DRAWINGS

1 is a schematic view of a clamping device in accordance with an embodiment of the present disclosure showing components to be secured.

2 is a schematic illustration of a clamping device in accordance with an embodiment of the present disclosure showing the components to be secured while removing the knobs of the base and the drive member.

3 is a partial cross-sectional view of a clamping device showing a member to be secured, in accordance with an embodiment of the present disclosure.

Reference mark:

100 clamping device;

10 drive member; 11 adjustment member; 12 second elastic member; 13 ball; 14 knob; 141 notch;

20 one-way clutch; 21 outer ring; 22 third elastic member; 23 roller; 211 protrusion;

30 core shaft;

42 clamping member; 41 first elastic member; 421 tapered hole; 422 flange;

50 base; 51 non-threaded hole; 52 threaded hole;

60 tool holder; 61 base.

Detailed ways

The embodiments of the present disclosure are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are illustrative, and are not intended to be construed as limiting.

A gripping device 100 for a microtome according to an embodiment of the present disclosure will be described below with reference to FIGS. 1-3.

As shown in FIGS. 1-3, the clamping device 100 according to an embodiment of the present disclosure includes a driving member 10, a one-way clutch 20, a mandrel 30, a first elastic member 41, a clamping member 42, and a base 50. The base 50 has a non-threaded hole 51 and a threaded hole 52 that intersects the non-threaded hole 51. a clamping member 42 movably disposed in the non-threaded hole 51 and configured to clamp the member to be fixed when moving in the first direction and to release the to-be-fixed when moving in a second direction opposite to the first direction The first end of the clamping member 42 extends from the non-threaded hole 51. The second end of the clamping member 42 is located in the non-threaded hole 51 and the clamping member 42 has a tapered hole 421 near the second end thereof. The axis of the tapered hole 421 is perpendicular to the first direction. The first elastic member 41 is disposed in the non-threaded hole 51, and the holding member 42 is supported on the first elastic member 41. The outer surface of the mandrel 30 has threads thereon for threading fit within the threaded bore 52 and movable within the threaded bore 52. The first end of the mandrel 30 is located within the base 50 and has a tapered shape for insertion into the tapered bore 421, the second end of the mandrel 30 being located outside of the base 50. The driving member 10 is sleeved on the mandrel 30 and located outside the base 50. The driving member 10 can be fixed to the mandrel 30 with a predetermined fastening force to drive the mandrel 30 to rotate, and can be fastened at the clamping member 42 with a predetermined The predetermined clamping force corresponding to the force grips the member to be fixed while disengaging from the mandrel 30 to stop the rotation of the drive mandrel 30. The one-way clutch 20 is sleeved on the mandrel 30 and connected to the driving member 10 for synchronous movement with the driving member 10. The one-way clutch 20 is configured not to be locked with the mandrel 30 in the first direction of rotation of the mandrel 30 for clamping the member to be fixed, and for the second rotation of the mandrel 30 for releasing the member to be fixed The mandrel 30 is locked in the direction.

In the clamping device 100 according to an embodiment of the present disclosure, the driving member 10 can be sleeved on the mandrel 30 with a predetermined fastening force, so that the user can operate the driving member 10 to drive the mandrel 30 to rotate, and the rotating mandrel 30 passes The cooperation between the tapered end portion and the tapered hole 421 of the holding member 42 causes the holding member 42 to move, thereby holding the member to be fixed with a gradually increasing clamping force. When the gripping member 42 grips the member to be fixed with a predetermined clamping force, if the user continues to operate the driving member 10, the driving member 10 can be disengaged from the mandrel 30 to stop the rotation of the driving mandrel 30, thereby preventing the gripping member 42 from being rotated. The force between the member to be fixed and the member to be fixed continuously increases to damage the holding member 42 and the member to be fixed, thereby prolonging the service life of the holding device 100 and the member to be fixed. Further, by presetting the fastening force between the driving member 10 and the mandrel 30, different users or the same user can only hold the member to be fixed at a predetermined clamping force corresponding to the predetermined fastening force at different times. Thus, the consistency of the clamping force can be ensured.

Specifically, as shown in FIG. 3, the non-threaded holes 51 of the base 50 extend in the up and down direction, while the threaded holes 52 of the base 50 extend in the left-right direction, and the threaded holes 52 vertically intersect the non-threaded holes 51. The gripping member 42 is movably disposed in the non-threaded hole 51 in the up-and-down direction, and the gripping member 42 is configured to grip the cutter holder 60 when moving in the downward direction (here, as an example of the first direction) Here, as an example of the member to be fixed) and in the upward direction (here as an example of the second direction), the tool holder 60 is released, the upper end of the holder 42 (as the holder 42) An example of one end) extends from the non-threaded bore 51, and the lower end of the clamp member 42 (as an example of the second end of the clamp member 42) is located within the non-threaded bore 51 and has a tapered bore 421. The axis of the tapered hole 421 is perpendicular to the up and down direction. The lower end of the clamping member 42 is provided with a groove, the upper end of the first elastic member 41 is disposed in the groove, and the lower end of the first elastic member 41 abuts against the bottom wall of the base 50 defining the non-threaded hole 51. Those skilled in the art will appreciate that the non-threaded bore 51 is defined by a peripheral wall and a bottom wall located within the base 50.

In the embodiment shown in FIG. 3, the tool holder 60 has a through hole aligned with the non-threaded hole 51, and the upper end of the holder 42 passes through the through hole of the tool holder 60. Further, the upper end of the holding member 42 is provided with a flange which is supported on the tool holder 60 and is stopped by the tool holder 60. Thereby, when the gripping member 42 is moved downward, the cutter holder 60 can be gripped with a gradually increasing gripping force, and when the gripping member 42 is moved upward, the cutter holder 60 can be released. It should be noted that the structure of the upper end of the clamping member 42 is not limited to the structure shown in FIG. 3, and the upper end of the clamping member 42 may be configured as other similar structures as long as it can ensure that when the clamping member 42 moves downward, The gradually increasing clamping force grips the tool holder 60, and when the holder 42 is moved upward, the tool holder 60 can be released.

In some embodiments of the present disclosure, both ends of the first elastic member 41 may be fixedly coupled to the bottom wall of the groove on the clamping member 42 and the bottom wall defining the non-threaded hole 51, respectively, whereby the clamping member 42 may It is stably supported on the first elastic member 41. In some embodiments of the present disclosure, the first elastic member 41 is a spring, however the present disclosure is not limited thereto, and other similar elastic members may also be used.

Further, the outer surface of the mandrel 30 is threaded to be threadedly fitted within the threaded bore 52 and movable within the threaded bore 52 in the left and right direction. Alternatively, only a part of the outer surface of the mandrel 30 is threaded as long as the requirement of the stroke of the mandrel 30 in the left-right direction during operation can be satisfied. The left end of the mandrel 30 (as an example of the first end of the mandrel 30) is located within the base 50 and has a tapered shape to fit into the tapered bore 421, the right end of the mandrel 30 (as the mandrel 30) An example of the two ends) is located outside of the base 50. As shown in FIG. 3, when the mandrel 30 is rotated in the clockwise direction R1 in the threaded hole 52, the left end of the mandrel 30 is gradually moved to the left to extend into the tapered hole 421, thereby driving the holder 42 downward. Moving (as indicated by arrow P3 in Fig. 3), causing the gripping member 42 to grip the cutter holder 60 with a gradually increasing clamping force until the gripping member 42 grips the cutter holder 60 with a predetermined clamping force; When the mandrel 30 rotates in the counterclockwise direction R2 within the threaded hole 52, the left end of the mandrel 30 gradually moves to the right to exit the tapered hole 421, whereby the gripping member 42 moves upward by the action of the first elastic member 41 ( As shown by the arrow P4 in Fig. 3, the tool holder 60 is released.

Further, the driving member 10 is sleeved on the mandrel 30 and near the right end of the mandrel 30. When it is required to fix the tool holder 60 using the clamping device 100, the driving member 10 is fixed to the mandrel 30 with a predetermined fastening force to drive the mandrel 30 to rotate, and the left end of the mandrel 30 gradually extends into the cone while the mandrel 30 rotates. In the shaped hole 421, the clamping member 42 is driven to move downward, so that the clamping member 42 clamps the tool holder 60 with a gradually increasing clamping force until the clamping member 42 holds the tool holding with a predetermined clamping force. At time 60, if the drive member 10 continues to be rotated, the drive member 10 will disengage from the mandrel 30 and will no longer drive the mandrel 30 to rotate. Specifically, during the process of gradually extending the left end of the mandrel 30 into the tapered hole 421, the force between the mandrel 30 and the holding member 42 is gradually increased until the predetermined between the driving member 10 and the mandrel 30. The fastening force is insufficient to overcome the force between the mandrel 30 and the clamp 42. At this time, if the driving member 10 is continuously rotated, the driving member 10 will be disengaged from the mandrel 30, and the mandrel 30 is no longer driven to rotate, while the holding member 42 holds the tool holder 60 with a predetermined clamping force.

In addition, the predetermined tightening force for mounting the driving member 10 on the mandrel 30 is adjustable, and the user can set a predetermined predetermined fastening force by the driving member 10 according to actual needs, thereby causing the holding member 42 to be correspondingly predetermined. The clamping force grips the tool holder 60, wherein the predetermined tightening force is positively correlated with the predetermined clamping force, that is, when the predetermined tightening force is increased, the predetermined clamping force is also increased, and when the predetermined tightening force is decreased, the predetermined The clamping force is also reduced.

In the embodiment shown in FIGS. 2 and 3, the drive member 10 includes an adjustment member 11, a second elastic member 12, a ball 13, and a knob 14. The knob 14 is annular, and the knob 14 is sleeved on the mandrel 30 and near the right end of the mandrel 30. The inner surface of the knob 14 can be attached to the outer surface of the mandrel 30. The knob 14 has a receiving hole extending in a radial direction thereof, and the mandrel 30 has a supporting hole corresponding to the receiving hole of the knob 14, wherein the receiving hole may be a through hole, and the supporting hole may be a blind hole. The adjusting member 11 is movably received in the receiving hole, in other words, the adjusting member 11 is movable in the receiving hole in the radial direction of the knob 14. In some embodiments of the present disclosure, the receiving holes are plural and are arranged along the circumferential direction of the knob 14, and the supporting holes are also plural and correspond one-to-one with the plurality of receiving holes.

In some embodiments of the present disclosure, the receiving aperture is a threaded bore and the adjustment member 11 is a bolt that is threaded into the threaded bore and movable along the threaded bore. Specifically, when the user rotates the bolt, the bolt can move within the threaded hole in the radial direction of the knob 14 by a threaded engagement with the threaded hole, thereby compressing or releasing the second elastic member 12 which will be described later.

Further, the ball 13 is located in the accommodating hole and is disposed at the support hole, and the diameter of the ball 13 is larger than the diameter of the support hole so that the ball 13 can be supported at the support hole. The second elastic member 12 is disposed in the accommodating hole between the adjusting member 11 and the ball 13, and is configured to press the ball 13 against the support hole. It should be noted that the ball 13 is only pressed against the support hole and is not fixed at the support hole. In other words, the ball 13 can be detached from the support hole when needed. For example, as the clamping force between the gripping member 42 and the cutter holder 60 is gradually increased, when the gripping member 42 grips the cutter holder 60 with a predetermined clamping force, the second elastic member 12 is applied to the ball The force of 13 is insufficient to continue to press the ball 13 against the support hole, i.e., the force between the ball 13 and the mandrel 30 cannot overcome the force between the clamp 42 and the mandrel 30. If the user continues to rotate the knob 14, the ball 13 will disengage from the support aperture, and a relative rotational movement between the knob 14 and the mandrel 30 occurs. Specifically, the mandrel 30 does not rotate, and the knob 14 continues to rotate while being sleeved on the mandrel 30. In some embodiments of the present disclosure, the second elastic member 12 is a spring, although the disclosure is not limited thereto, and other similar elastic members may also be used.

In addition, the user can rotate the adjusting member 11 (for example, a bolt) to move the adjusting member 11 in the receiving hole, thereby compressing or releasing the second elastic member 12, thereby adjusting the force of the second elastic member 12 on the ball 13, thereby The force between the ball 13 and the mandrel 30 is adjusted, that is, a predetermined fastening force for fixing the driving member 10 to the mandrel 30 is provided. As described above, the predetermined tightening force corresponds to the predetermined clamping force, and after the predetermined tightening force is set, the gripping device 100 according to the present disclosure will grip the cutter holder 60 with a corresponding predetermined clamping force, even if different The user or the same user uses the clamping device 100 differently.

As shown in FIGS. 2 and 3, the one-way clutch 20 is sleeved on the mandrel 30 and connected to the driving member 10 for synchronous movement with the driving member 10. Specifically, as shown in FIG. 2, the one-way clutch 20 is sleeved on the mandrel 30 and near the right end of the mandrel 30. The one-way clutch 20 includes an outer ring 21, a third elastic member 22, and a roller 23. The outer ring 21 is sleeved on the mandrel 30, and the inner wall of the outer ring 21 has a groove extending in the circumferential direction thereof, and the roller 23 is rollably received in the groove. The third elastic member 22 is also disposed in the recess, one end of the third elastic member 22 is adapted to abut against the roller 23, and the other end of the third elastic member 22 is adapted to be coupled to a side wall defining the recess. Those skilled in the art will appreciate that the grooves are defined by the side walls and the bottom wall located within the outer ring 21.

In the embodiment of the present disclosure, a side of the outer ring 21 adjacent to the driving member 10 is provided with a protrusion 211, and a side of the driving member 10 adjacent to the outer ring 21 (specifically, a side of the knob 14 adjacent to the outer ring 21) A notch 141 corresponding to the protrusion 211 is provided, and the protrusion 211 is adapted to fit in the notch 141, thereby avoiding relative rotation between the one-way clutch 20 and the driving member 10, that is, ensuring the one-way clutch 20 and the driving member 10 synchronized movements.

In some embodiments of the present disclosure, the protrusions 211 are plural and are arranged along the circumferential direction of the outer ring 21, and the notches 141 are also plural and are in one-to-one correspondence with the plurality of protrusions 211, thereby further ensuring the one-way clutch. Synchronous movement with the drive member 10.

In an embodiment of the present disclosure, if the outer ring 21 of the one-way clutch 20 attempts to rotate counterclockwise with respect to the mandrel 30, the roller 23 will wedge between the mandrel 30 and the outer ring 21, both Locked, the two will move synchronously, for example together in a counterclockwise direction R2. If the outer ring 21 of the one-way clutch 20 is rotated in the clockwise direction R1 with respect to the mandrel 30, the roller 23 is not wedged between the mandrel 30 and the outer ring 21, so the outer ring 21 and the mandrel 30 are not locked. That is, there can be relative rotation between the two. In addition, it is to be noted that the specific configuration of the one-way clutch 10 is not limited to the above embodiment, and other configurations may be employed as long as the above functions can be realized.

However, it should be noted that since the driving member 10 is fixed to the mandrel 30 with a predetermined fastening force, the driving member 10 can drive the mandrel 30 to rotate in the clockwise direction R1, and since the driving member 10 and the one-way clutch 20 move synchronously. Therefore, before the holding member 42 has not clamped the tool holder 60 with a predetermined clamping force, the outer ring 21 of the one-way clutch 20 rotates synchronously with the mandrel 30 in the clockwise direction R1 when the holding member 42 is held by the predetermined When the force grips the tool holder 60, if the user continues to operate the driving member 10 (ie, rotates the knob 14 in the clockwise direction R1), the driving member 10 is disengaged from the mandrel 30, that is, the driving member 10 no longer drives the mandrel 30 along. The hour hand direction R1 rotates, and the outer ring 21 of the one-way clutch 20 continues to rotate with the drive member 10, at which time relative rotation between the outer ring 21 and the mandrel 30 can occur.

Thus, by providing the one-way clutch 20 and the drive member 10 connected to the one-way clutch 20, the user can fix or loosen the tool holder 60 using the clamping device 100, in particular in accordance with the predetermined tightening force set. The uniform predetermined clamping force fixes the tool holder 60 without excessive or too small clamping force, ensuring the operational stability of the clamping device 100 and prolonging the service life of the clamping device 100.

The operation of the clamping device 100 according to an embodiment of the present disclosure will be described below with reference to FIGS. 2 and 3.

When the tool holder 60 is held by the gripping device 100, the adjusting member 11 of the driving member 10 is first adjusted to set a predetermined tightening force, thereby fixing the driving member 10 to the mandrel 30 with a predetermined tightening force, and then The hour hand direction R1 rotates the knob 14 to drive the mandrel 30 to rotate in the clockwise direction R1, and the mandrel 30 moves to the left while rotating (as indicated by an arrow P2 in FIG. 3), so that the left end of the mandrel 30 is squeezed and clamped. The side wall of the tapered hole 421 of the member 42 is configured to drive the clamping member 42 to move downward (as indicated by an arrow P3 in FIG. 3), whereby the clamping member 42 clamps the tool holder with a gradually increasing clamping force. 60, until the gripping member 42 grips the cutter holder 60 with a predetermined gripping force corresponding to the set predetermined tightening force. During the clamping of the tool holder 60 by the increasing clamping force, the force between the mandrel 30 and the clamping member 42 is gradually increased until the ball 13 and the mandrel 30 are The force is insufficient to overcome the force between the clamping member 42 and the mandrel 30. At this time, if the rotation of the knob 14 is continued, the driving member 10 will be disengaged from the mandrel 30 to stop the rotation of the driving mandrel 30, and the holding member 42 grips the tool with a predetermined clamping force corresponding to the set predetermined fastening force. Holder 60. In other words, as the knob 14 continues to be rotated, the drive member 10 continues to rotate in the clockwise direction R1 with the one-way clutch 20, while the mandrel 30 is no longer rotated. Therefore, the holder 42 can hold the tool holder 60 fixed with a corresponding predetermined clamping force.

Thereby, it is possible to realize that the tool holder 60 can be fixed with a uniform clamping force when the different users or the same user use the clamping device 100 differently, and the clamping device 100 and the tool holder 60 are prevented from being excessive when the clamping force is excessive. The damage caused, as well as the fixing of the tool holder 60 caused by the insufficient clamping force, is not strong. In addition, the user can set different predetermined fastening forces according to actual needs, thereby fixing the tool holder 60 with corresponding different predetermined clamping forces, thereby meeting the requirements under various working conditions.

When it is necessary to loosen the fixed tool holder 60, the knob 14 is rotated in the counterclockwise direction R2, although the driving member 10 cannot drive the mandrel 3 to rotate at this time, since the rotary knob 14 moves synchronously with the one-way clutch 20 and is unidirectional. The clutch 20 is now locked with the mandrel 30, and the mandrel 30 can still be rotated in the counterclockwise direction R2 together with the one-way clutch 20 and the knob 14 by the one-way clutch 20. The mandrel 30 moves to the right while rotating (as indicated by an arrow P1 in FIG. 3), so that the left end of the mandrel 30 is withdrawn from the tapered hole 421, whereby the holding member 42 is under the action of the second elastic member 41. The upward movement (such as arrow P4 in Fig. 3) releases the tool holder 60.

Thus, by providing the one-way clutch 20 and the drive member 10 that is synchronously coupled to the one-way clutch 20, the user can release the tool holder 60 when the tool holder 60 is not required to be fixed.

In some embodiments of the present disclosure, the member to be fixed is a tool holder 60, the tool holder 60 includes a base 61 having a non-threaded hole 611, a non-threaded hole 611 of the base 61 and a non-threaded hole of the base 50 In alignment with 51, the upper end of the clamp member 42 projects from the non-threaded hole 611 of the base portion 61.

Further, the upper end of the holding member 42 is provided with a flange 422 which is disposed on the base portion 61 so that the base portion 61 can be sandwiched between the flange 422 and the base 50, thereby fixing the tool holder 60.

In the embodiment of the present disclosure, the base portion 61 has two stoppers spaced apart from each other on the upper surface thereof, and two stopper members sandwich the flange 422 therebetween, as shown in FIG. 2 . Further, the clamping stability of the holder 42 to the tool holder 60 is ensured.

It should be noted that other mechanisms of the tool holder 60 other than the base portion 61 are well known to those skilled in the art and will not be described herein.

In the description of the present disclosure, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of describing the present disclosure and the simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the disclosure.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present disclosure, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present disclosure, the terms "installation", "connected", "connected", "fixed", and the like, are to be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated or defined otherwise. , or integrated; can be mechanical or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements, unless otherwise specified Limited. The specific meanings of the above terms in the present disclosure can be understood by those skilled in the art on a case-by-case basis.

In the present disclosure, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material, or feature is included in at least one embodiment or example of the present disclosure. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

While the embodiments of the present disclosure have been shown and described above, it is understood that the foregoing embodiments are illustrative and are not to be construed as limiting the scope of the disclosure The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A clamping device for a microtome comprising:

a base having a non-threaded hole and a threaded hole intersecting the non-threaded hole;

a clamping member movably disposed in the non-threaded hole and configured to clamp a member to be fixed while moving in a first direction and in a second direction opposite to the first direction Release the member to be fixed while moving, the first end of the clamping member protrudes from the non-threaded hole, the second end of the clamping member is located in the non-threaded hole and the clamping member a tapered hole at a position near the second end thereof, the axis of the tapered hole being perpendicular to the first direction;

a first elastic member, the first elastic member is disposed in the non-threaded hole, and the clamping member is supported on the first elastic member;

a mandrel having a thread on an outer surface of the mandrel for threading fit within the threaded bore and movable within the threaded bore, the first end of the mandrel being located within the base and having a taper Shaped to fit into the tapered bore, the second end of the mandrel being located outside the base;

a driving member sleeved on the mandrel and located outside the base, the driving member being fixable to the mandrel with a predetermined fastening force to drive the mandrel to rotate, and capable of being a clamping member disengaging from the mandrel to stop driving the mandrel rotation when the member to be fixed is clamped by a predetermined clamping force corresponding to the predetermined fastening force;

a one-way clutch sleeved on the mandrel and connected to the driving member for synchronous movement with the driving member, the one-way clutch being configured for clamping on the mandrel The first direction of rotation of the member to be fixed is not locked with the mandrel, and a second at the mandrel for releasing the member to be fixed and opposite to the first direction of rotation The mandrel is locked in the direction of rotation.
The clamping device according to claim 1, wherein the second end of the clamping member is provided with a groove, one end of the first elastic member is disposed in the groove, and the first elastic member The other end abuts against a bottom wall in the base defining the non-threaded aperture.
The clamping device of claim 1 wherein said drive member comprises:

a knob, the knob is annular and sleeved on the mandrel, the knob has a receiving hole extending along a radial direction thereof, the mandrel having a supporting hole corresponding to the receiving hole of the knob;

An adjusting member movably received in the receiving hole;

a ball, the ball being located in the receiving hole and disposed at the support hole, the ball having a diameter larger than a diameter of the support hole to enable the ball to be supported in the support hole And;

a second elastic member disposed in the receiving hole between the adjusting member and the ball and configured to press the ball against the supporting hole.
The holding device according to claim 3, wherein said receiving hole is a threaded hole, and said adjusting member is a bolt threadedly fitted in said threaded hole and movable along said threaded hole.
The holding device according to claim 3, wherein said knob includes a plurality of said receiving holes arranged along a circumferential direction thereof, said mandrel having a plurality of said supporting holes, and said plurality of said supporting holes and The receiving holes are in one-to-one correspondence.
The holding device according to claim 3, wherein the receiving hole is a through hole and the supporting hole is a blind hole.
The clamping device of claim 1 wherein said one-way clutch comprises:

An outer ring, the outer ring is sleeved on the mandrel, and an inner wall of the outer ring has a groove extending along a circumferential direction thereof;

a roller that is rollably received within the recess;

a third elastic member, the third elastic member is disposed in the groove, one end of the third elastic member is adapted to abut against the roller, and the other end of the third elastic member is adapted to be connected To define the sidewall of the groove.
The clamping device according to claim 7, wherein a side of the outer ring adjacent to the driving member is provided with a protrusion, and a side of the driving member adjacent to the outer ring is provided with the protrusion Corresponding notches, the projections fit within the recesses.
The holding device according to claim 8, wherein the plurality of projections are arranged along a circumference of the outer ring, and the plurality of notches are also plural and correspond one-to-one with the plurality of projections.
The clamping device according to claim 1, wherein a first end of the clamping member passes through the member to be fixed and is provided with a flange, and the flange is disposed on the member to be fixed, The member to be fixed can be clamped between the flange and the base.