Locking device used for fixing and positioning three components in combined mode and wide-belt grinding machine

Abstract

The present application relates to a locking device for the combined fixing and positioning of three parts, the three parts forming a group, comprising a first part and two second parts, further comprising an externally threaded rod and an internally threaded clamp, the rod and the clamp each comprising at least one stop surface, wherein the locking device can respectively enter a working position and a non-working position, characterized in that the rod mainly comprises an unthreaded part relative to the stop surface, and in addition, a first force storage element at least partially surrounds the rod, which element presses the first part against the stop surface in the non-working position, has an anti-drop device on the end which is spirally fixed to the rod, and the second force storage element applies a force to the clamp when in the non-working position.

Description

Technical Field

[0001] The invention relates to a locking device for closing, fixing and positioning three components and a wide-band grinder. Background Art

[0002] Locking devices come in a variety of common and commonly used shapes and designs. Summary of the invention

[0003] Invention Task

[0004] The object of the described invention is to overcome the disadvantages of the prior art.

[0005] Mission Solution

[0006] According to a preferred embodiment of the invention, the locking device is used to fix and position three components of a wide belt grinding machine in a group, which are composed of a first component and two second components. In particular, the locking device can be used to fix and position the first component relative to the two second components.

[0007] The first component comprises at least one first fitting fixing and positioning element. The two second components each comprise at least one second fitting fixing and positioning element. The second element is complementary in shape to at least one first element. In addition, these elements are suitable for mutually fitting and effectively connected. For example, the shape of these elements can be complementary protrusions and recesses. Various geometric shapes with complementary shapes can be used here. For example, the shape of the protrusions and recesses can be complementary cones.

[0008] At least one first element for mold-fitting, fixing and positioning of the first component can be designed as a recessed portion. At least one second element for mold-fitting, fixing and positioning of each second component can be designed as a protrusion with a shape complementary to that of the first element.

[0009] The locking device also includes an externally threaded rod and an internally threaded clamp. The external thread can be screwed into the internal thread. It can be considered that the clamp is screwed onto the rod like a nut.

[0010] The rod and the clamp each include at least one stop surface. The stop surface of the rod is preferably configured at least partially as a rotation surface. The stop surface of the rod is particularly preferably configured as a circular surface.

[0011] The locking device can be brought into an operating position in which the three components are mutually secured and positioned by effectively connecting the first and second elements. In the operating position, the external thread of the rod is screwed onto the internal thread of the clamp so that the stop surface of the component applies pressure to achieve and maintain the closed fixing and positioning. The pressure can preferably act on at least one of the components through the above-mentioned threads when the rod and the clamp are initially screwed, and can support, achieve or at least favorably promote the closed effective connection.

[0012] The effective connection is preferably carried out by moving the first component parallel to the longitudinal direction of the rod onto the second component. Furthermore, screwing is preferably also carried out parallel to the longitudinal direction of the rod. The clamp is preferably screwed onto the externally threaded rod by its thread. The first and second elements can be conical in order to facilitate positioning and, if necessary, centering. For example, the first element of the first component can be designed as a conically tapered concave portion at least in cross section. Correspondingly, the second element can be designed as a conically tapered convex portion of complementary shape.

[0013] The locking device can also be brought into an inoperative position, in which the inner and outer threads are not screwed into each other.

[0014] In a preferred embodiment, the working position can be referred to as a tightened or screwed state, and the non-working position can be referred to as a loosened state, based on the threads of the rod and the clamp. Therefore, the locking device is preferably a reversibly acting device, which can reversibly fix and position the three components. In the non-working position, the three components are preferably not subjected to pressure from the stop surface or at least not subjected to pressure from the two stop surfaces.

[0015] The reversible fixing and positioning of the three components relative to each other is preferably carried out by moving the first component relative to the two second components (in particular by tightening the process). Even in the non-operating position, the two second components preferably also retain their position. The position applies optimally to their absolute position in space and second best at least to their relative position. Therefore, when determining the operating position, preferably only the position of the first component in space is changed and it is fixed and positioned within the scope of the invention.

[0016] Preferably, the stop surface of the rod can exert pressure on the first component, in particular in the operating position and preferably also in the non-operating position. On the one hand, the stop surface can be used for fixing in the operating position and on the other hand can be used to prevent the rod from being accidentally removed, for example accidentally pushed into a wide belt grinder. The latter is particularly applicable when the rod is guided through a recess, in particular through a bore of the first component, in the operating position and in the non-operating position, i.e. preferably in the tightened and loosened state. The stop surface can thus serve as a release prevention device for the first component.

[0017] Furthermore, in the above-mentioned variants, the locking device is preferably also connected to the first component in the inoperative position.

[0018] The locking device is preferably always connected to the first component in a release-proof manner, including in the inoperative position, wherein the stop surface of the lever and the stop surface of the clamp serve as release-proof means.

[0019] The locking device is particularly preferably used as a component of a wide belt grinding machine.

[0020] Preferably, the rod mainly comprises a non-threaded portion relative to the stop surface. Considering the stop surface, the non-threaded portion is preferably located outside the external thread. The non-threaded portion preferably extends to the end portion of the rod.

[0021] Furthermore, the locking device comprises a first force storage element which at least partially surrounds the rod and is supported on the clamp and the first component. Optionally, the first force storage element can also be fixed to the first component. The force acting on the clamp and the first component from the first force storage element acts parallel to the longitudinal direction of the rod. This force resists the approach between the clamp and the first component.

[0022] In addition, the locking device also includes an anti-detachment device bolted to the end of the rod. The anti-detachment device is preferably attached to the end of the rod to which the unthreaded portion extends. The rod stop surface is located at or near the opposite end of the rod. The anti-detachment device includes at least one adjustment ring. In addition, the anti-detachment device also includes a fixing ring, a sliding disk and a second force storage element described below.

[0023] The locking device further comprises a second force storage element which applies a force to the clamp in a non-operating position, preferably in parallel to the longitudinal direction of the rod. The force acting directions of the first and second force storage elements are preferably parallel to each other.

[0024] The second force storage element is preferably supported on the anti-separation device and the clamp, and prevents the clamp from approaching the anti-separation device. In any case, this applies to the non-operating position. In the operating position, it can be considered that the second force storage element is fixed to the anti-separation device, in particular to the adjustment ring, but not supported on the clamp.

[0025] In the inoperative position, the clamp is not screwed onto the rod and its stop surface does not exert any pressure on the component.

[0026] In the non-working position, the force transmitted from the second force storage element to the clamp ensures that the thread entry of the internal thread in the clamp is always pressed against the thread entry of the external thread of the rod. The component dimensions of the locking device, in particular the spring constants of the two force storage elements, can be selected so that the second force storage element always ensures that the thread entry is pressed against each other in the non-working position. In addition, since the second force storage element supports the clamp and the anti-detachment device in the non-working position, it also causes a displacement of the rod, so that the rod end where the anti-detachment device is located is pushed away from the clamp position. The reaction force of this rod displacement process acts directly on the first component through the first force storage element. As a result, the rod stop surface located near the opposite end of the rod is pressed against the first component, which can prevent rattling in the non-working position. In the absence of the above-mentioned force storage element, the rod may slip and / or vibrate in its longitudinal direction in the non-working position, so that rattling noises may occur due to the collision of the rod stop with the first component.

[0027] When the threaded entries are pressed against each other, the clamp can be rotated at any time in the non-working position and screwed directly onto the rod by means of a rotational movement. This type of clamp rotation can be performed manually or with an impact wrench or similar tool.

[0028] Therefore, preferably adjust the locking device, in particular the second force storage element, so that the thread entry of the clamp internal thread is always pressed against the thread entry of the rod external thread in the non-working position. In this way, time-consuming search for the thread entry is avoided.

[0029] It is understood that the size and spring constant of the force storage element are appropriately selected so that in the non-operating position, both force storage elements exert pressure on the clamp, or only the second force storage element exerts pressure on the clamp. In order to keep the clamp in the non-operating position in a position where the threaded inlets are directly against each other, it may be sufficient for the second force storage element to exert pressure on the clamp.

[0030] It can also be understood that in the non-working position, both force storage elements apply pressure to the clamp, and the two pressures act in opposite directions. At this time, it can be considered that the pressure exerted by the second force storage element on the clamp is greater than the pressure exerted by the first force storage element on the clamp. In this way, the clamp is fixed in a position where the threaded inlets contact each other.

[0031] In all cases, applying pressure via the second energy storage element does two things: first, it prevents rattling in the non-operating position. Second, it allows the clamp to be screwed in easily without the need for time-consuming searching for threaded entry or manual positioning.

[0032] The same applies if the first energy storage element also exerts a certain pressure on the clamp in the non-operating position, but the clamp remains in the above-mentioned position close to the threaded entry, or even preferably in a position of mutual compression. As described above, this is achieved in the simplest way by selecting suitable spring constants and dimensions so that when the threaded entry is in contact with each other in the non-operating position, the pressure of the second energy storage element on the clamp is greater than the pressure of the first energy storage element on the clamp.

[0033] As mentioned above, it is possible to consider reasonably selecting the size and spring parameters of the second force storage element so that it does not apply pressure to the clamp when it is in the working position. When the working position is near the end, the first force storage element can simplify or promote the unscrewing of the clamp, so that the second force storage element does not apply any pressure to the clamp at the beginning of the unscrewing process, which can prevent the clamp from moving parallel to the longitudinal axis of the rod when it is unscrewed. At the latest, when the clamp is unscrewed and the internal thread is not engaged with the external thread, the clamp is subjected to pressure from the second force storage element. Preferably, at the latest, when the working position is near the end and after the clamp is unscrewed, the threads are no longer engaged with each other, the pressure of the second force storage element on the clamp is greater than the pressure of the first force storage element on the clamp. The effective direction of this pressure is parallel and opposite to the effective direction of the pressure transmitted to the clamp by the first force storage element. In this case, since the two force storage elements exert force in opposite directions, the clamp is always positioned in the non-working position, so that the thread entrances of the internal and external threads can approach each other at any time, especially can be close to each other and screwed in, that is, can be screwed or screwed in. This eliminates the need to find a thread entry and move the clamp parallel to the rod radial axis before starting to screw in. It is also possible to consider such an embodiment that only the second force storage element applies pressure to the clamp in the non-operating position.

[0034] The invention also includes a wide belt grinder, which includes a locking device designed according to one of the above embodiments and three components. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] For further advantages, features and details of the present invention, please refer to the following preferred embodiment description and drawings; the details are as follows:

[0036] Figures 1 to 10 Shown are different views of a locking device in different states as part of a belt grinder (only partially shown).

[0037] For the sake of better viewing, not all features are provided in all drawings. DETAILED DESCRIPTION

[0038] Example

[0039] Figure 1 and 3 Shown is an exploded view of the locking mechanism. Figure 2 Shown is an exploded perspective view.

[0040] Here, three components are shown, namely a centering disc 1 and a first matching part 4 and a second matching part 5, which are positioned and fixed relative to each other. Figures 6 to 10 As shown, it can be seen that the centering disk 1 can be reversibly positioned and fixed relative to the counterpart 4, 5. The positioning and position of the counterpart 4, 5 as a component of the wide belt grinder is thus preferably determined in an unchanging manner by installing it in the wide belt grinder.

[0041] In addition, Figures 1 to 3 The following components of the locking device can be seen: rod 2, first pressure spring 3, clamp 6, second pressure spring 7, sliding disk 8, adjustment ring 9 used as anti-disengagement device, fixing ring 10, recess 11, protrusion 12, external threaded portion 13 of rod 2, external threaded portion 14 of clamp 6, stop surface 15 of rod 2, stop surface 16 of clamp 6, non-threaded portion 17 of rod 2, and threaded entry 18 of internal thread 14 and threaded entry 19 of external thread 13.

[0042] Figure 4 and 5 Shown are a perspective view and a cross-sectional view of the locking device in the inoperative position.

[0043] Figure 6 and 7 Shown is a cross-sectional view of a wide belt grinding machine, showing, for example, a connecting element 22 and a plate 20 to an abrasive tool carrier (not shown). Figure 7 and Figure 6 The difference is that it is partially cutaway.

[0044] In addition, from Figure 6 and 7 As can be seen in the figure, the locking devices are preferably used in pairs. Both locking devices are fixed to the plate 20 between the centering disc 1 and the corresponding disc 21. In addition, the handle 23 can also be seen.

[0045] Figure 6 and 7 The locking device is shown in the non-operating position. Figure 8 The following is a cross-sectional view of the locking device in the working position. The clamp 6 is screwed onto the rod 2. The process of screwing the threads 13 and 14 together will be described in detail below. In this working position, the parts 1, 4, 5 are locked and positioned together. In addition, Figure 8 Shown is Figure 6 and 7 Sectional view corresponding to the layout in Figure 1, but with the device in the working position.

[0046] Fig. 9 and 10 Shown is how to turn plate 20 to the left ( Fig.10 Pull out and make it relative to Figure 6 and 7 The plate 20 can be adjusted to the position shown in the figure by 90° in order to facilitate the replacement (not shown) of abrasive tools, in particular abrasive belts (not shown). Fig. 9 and 10 The location shown in .

[0047] Considering the interaction between the two second fittings 4, 5 and the centering disc 1, they can be regarded as a group: both fittings 4, 5 have a conical protrusion 12 that engages with the centering disc recess 11. That is, the centering disc 1 is the first component, and the fittings 4, 5 are the two second components.

[0048] The convex part 12 is complementary to the concave part 11. The concave part 11 is a conical concave part which tapers downward. Figure 2 As shown, the convex portion 12 is substantially semicircular and as shown in FIG. Figure 1 As shown, its cross section is a tapered shape that tapers gradually. Figure 1 It can be seen that both the convex portion 12 and the concave portion 11 gradually taper to the left ( Figure 1 middle).

[0049] refer to Figures 1 to 10 , the working principle of the device designed according to the present invention is explained as follows:

[0050] The centering disc 1 is connected to a plate 20 and a disc 21. The first fitting 4 is connected to a grinding tool carrier (not shown) via a connecting element 22. The second fitting 5 is connected to a base frame (not shown) of the wide belt grinding machine.

[0051] The running position is as follows Figure 8 As shown. The clamp 6 has been screwed onto the rod 2, wherein the effective connection between the clamp 6 and the rod 2 is ensured by its threads 13, 14. The stop surface 15 of the rod 2 and the stop surface 16 of the clamp 6 ensure that the two mating parts 4, 5 form a complementary effective connection with the recess 11 of the centering disk 1 through the protrusion 12. The mating parts 4, 5 are positioned and fixed relative to each other by the pressure of the stop surfaces 15, 16.

[0052] exist Figure 8 It can be clearly seen in the figure that the second pressure spring 7 is in a relaxed state in the working position and does not exert pressure on the clamp 6. On the contrary, the first pressure spring 3 is compressed.

[0053] In order to Figure 8 The working position shown is brought into the inoperative position by loosening the threaded connection of the threads 13, 14 to release the engagement of the clamp 6 with the rod 2. For example, an impact wrench can be used to perform the loosening operation. In particular, when changing abrasive tools (not shown), the locking device is adjusted to the inoperative position.

[0054] As soon as the threads 13, 14 no longer engage with each other, the locking device is in the non-operating position. The spring constant and the size of the pressure springs 3, 7 are selected so that the threaded inlets 18, 19 of the threads 13, 14 are always in the non-operating position. Figure 5 As shown, they are close to or overlap each other. Figure 5In the layout structure, the downward pressure exerted by the second pressure spring 7 on the clamp 6 is greater than the upward pressure transmitted to the clamp 6 by the first pressure spring 3.

[0055] exist Figure 5 It can also be seen that in the non-working position, the fixing ring 10 is located in the groove 25 of the clamp 6, and the sliding plate 8 is located on the clamp 6, so that the pressure from the second pressure spring 7 can be transmitted to the clamp 6.

[0056] like Fig.10 As shown, after the disc 20 is pulled out and rotated, the abrasive tool (not shown) can be replaced.

[0057] During this process, the adjusting ring 9, the second pressure spring 7 and the sliding plate 8 are used together as an anti-separation device to prevent the clamp 6 from being completely loosened from the rod 2 when it is in the non-working position. At this time, only the adjusting ring 9 is still screwed on the rod 2, while the pressure spring 7 and the sliding plate 8 are not.

[0058] If in Fig.10 After the grinding tool is replaced, the wide belt grinder needs to be switched back to normal operation mode. The plate 20 should be rotated and pushed in again. During this pushing process, the centering disc 1 fixed to the plate 20 is also pushed in, and the recessed portion 11 thereof will receive the protruding portion 12 of the mating parts 4 and 5. Then tighten the clamp 6, that is, screw the external thread 13 of the rod 2 and the internal thread 14 of the clamp 6 together until the outer thread 13 of the rod 2 and the inner thread 14 of the clamp 6 are screwed together. Figure 8 This operation is very simple and user-friendly, because the second pressure spring 7 always applies an appropriate force to the clamp 6 in the non-operating position, so that the threaded inlets 18, 19 of the two threads 13, 14 are always close to each other. This can be seen in Figure 5 Clearly seen in.

[0059] As can be seen from the figure, the clamp 6 is screwed onto the rod 2 in the manner of a nut.

[0060] It can also be intuitively observed from the figure that the stop surface 16 of the clamp 6 and the stop surface 15 of the rod 2 press on the centering disc 1 and the matching parts 4, 5 from different directions, and in this way achieve the effect of mold fixing and positioning, or at least play a supporting role. Figure 8 As shown in the layout, the stop surfaces 15, 16 can also ensure that the previously achieved positioning is maintained.

[0061] from Figure 5 It can be seen from FIG. 1 that when the rod 2 and the clamp 6 are connected by the threads 13 and 14, the pressure from the second pressure spring 7 has already acted on the clamp 6. Figure 5 As shown, the threaded entry points 18 , 19 are located next to one another and it is possible to start directly from the first manually performed rotational movement without having to search for the threaded entry points.

[0062] It can also be seen from this figure that the effective connection is achieved by the components (i.e. the centering disc 1 and the fittings 4, 5) approaching each other parallel to the radial direction of the rod 2. During this connection process, the centering disc 1 is also correctly positioned and centered at the same time due to the conical shape of the recess 11 and the protrusion 12.

[0063] Especially combined with Figure 3 , 5 As can be clearly seen from Figures 8 and 9, the rod 2 is guided through the bore 24 in the centering disc 1, and its stop surface 15 is located below the centering disc 1. In this way, the stop surface 15 can exert a pressure on the centering disc (at Figure 5 and 8 At the same time, the stop surface 15 also serves as an anti-detachment device for the rod 2, which otherwise may be (in Figure 5 and 8 from the perspective of “upwards”).

[0064] Especially if Figure 7 and 10 As shown, the adjusting ring 9 acts to prevent disengagement relative to the clamp 6 and the stop surface 15 acts relative to the centering disk 1 , thereby permanently connecting the entire locking device to the plate 20 .

[0065] exist Figure 5 In the non-working position shown, the first pressure spring 3 and the second pressure spring 7 ensure that the clamp 6 is in the position shown in the figure, in which the threads 18 and 19 are directly adjacent to each other and can be tightened at any time by rotating the clamp 6. The appropriate size and spring constant of the pressure springs 3 and 7 are selected so that the first pressure spring 3 does not press the clamp 6 in the direction of the adjustment ring 9, such as Figure 5 shown.

[0066] from Figure 8 It can be seen intuitively that the first pressure spring 3 can promote the unscrewing, that is, the clamp 6 moves upward (at Figure 8 In addition, in the non-operating position, the second pressure spring 7 prevents possible rattling noises caused by the threaded inlets 18, 19 colliding when the clamp 6 could move freely along the rod 2. Such free movement can be suppressed by the second pressure spring 7, because the second pressure spring 7 always presses the clamp 6 downwards, so that the threaded inlet 18 is pressed against the threaded inlet 19 of the external thread 13. This prevents rattling noises.

[0067] In addition, the size and spring constant of the second compression spring 7 have been selected appropriately so that Figure 8 In the working position shown, it does not exert any pressure on the clamp 6 via the sliding plate 8.

[0068] Reference numerals list

[0069] 1 Centering plate

[0070] 2 poles

[0071] 3. First pressure spring

[0072] 4 First matching piece

[0073] 5 Second matching piece

[0074] 6. Fixture

[0075] 7 Second pressure spring

[0076] 8 Sliding plate

[0077] 9 Adjustment ring

[0078] 10 Fixing ring

[0079] 11 recess

[0080] 12 convex part

[0081] 13 External thread

[0082] 14 Internal thread

[0083] 15 Rod stop surface

[0084] 16 Clamp stop surface

[0085] 17 Unthreaded part

[0086] 18 Thread entry for internal thread

[0087] 19 Thread entry for external thread

[0088] 20 Plates

[0089] 21 Plates

[0090] 22 Connecting element (to abrasive carrier)

[0091] 23 Handle

[0092] 24 Drilling

[0093] 25 grooves.

Claims

1. A locking device for closing and positioning three parts, wherein The three components form a group, comprising a first component (1) and two second components (4, 5); The first component (1) comprises at least one first element (11) for mold-fitting, fixing and positioning, and The second components (4, 5) each include at least one second element (12) for mold-fitting, fixing and positioning; The second element (12) is complementary in shape to at least one first element (11), and the first element (11) and the second element (12) are adapted to each other to achieve a form-fitting and effective connection; In addition, the locking device also includes a rod (2) with an external thread (13) and a clamp (6) with an internal thread (14), and the external thread (13) can be threadedly connected with the internal thread (14); The rod (2) and the clamp (6) each include at least one stop surface (15, 16); The locking device can enter a working position, in which the three components are in a mutually engaged, fixed and positioned state, and the stop surfaces (15, 16) exert pressure on the three components through the effective mutual connection between the first element (11) and the second element (12) and the threaded connection between the external thread (13) of the rod (2) and the internal thread (14) of the clamp (6), so as to achieve and maintain the engaged, fixed and positioned state; Furthermore, the locking device can also enter a non-operating position, in which the internal thread (14) and the external thread (13) are not screwed together; It is characterized in that The rod (2) mainly comprises a non-threaded portion (17) relative to a stop surface of the rod (2); A first force storage element (3) at least partially surrounds the rod (2), and the first force storage element presses the first component (1) against a stop surface of the rod (2) in a non-operating position; The locking device also includes an anti-detachment device, which is screw-fixed to the rod (2) at the end; The second force storage element (7) applies a force to the clamp (6) in the non-operating position.

2. The locking device for closing, fixing and positioning three components according to claim 1, characterized in that: The dimensions and spring constants of the first force storage element (3) and the second force storage element (7) are selected so that: in the non-working position, the first force storage element (3) and the second force storage element (7) apply pressure to the clamp (6), or only the second force storage element (7) applies pressure to the clamp (6).

3. The locking device for closing, fixing and positioning three parts according to claim 1 or 2, characterized in that: The dimensions and spring parameters of the second force storage element (7) are selected such that the second force storage element (7) does not exert pressure on the clamp (6) in the working position.

4. The locking device for closing, fixing and positioning three components according to claim 1 or 2, characterized in that: The second force storage element (7) is adjusted and set so that the thread entry (18) of the internal thread of the clamp always presses on the thread entry (19) of the external thread of the rod in the non-working position.

5. Wide belt grinder, characterized in that: The wide belt grinding machine comprises a locking device for mold-fitting, fixing and positioning three components according to any one of claims 1 to 4 and the three components.

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