US3747691A - Striking machine - Google Patents

Striking machine Download PDF

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Publication number
US3747691A
US3747691A US00113889A US3747691DA US3747691A US 3747691 A US3747691 A US 3747691A US 00113889 A US00113889 A US 00113889A US 3747691D A US3747691D A US 3747691DA US 3747691 A US3747691 A US 3747691A
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US
United States
Prior art keywords
striking
curve
hammer
lever
longitudinal axis
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00113889A
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English (en)
Inventor
O Lundman
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Individual
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Individual
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Filing date
Publication date
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Publication of US3747691A publication Critical patent/US3747691A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D11/00—Portable percussive tools with electromotor or other motor drive
    • B25D11/06—Means for driving the impulse member
    • B25D11/10—Means for driving the impulse member comprising a cam mechanism

Definitions

  • ABSTRACT [30] Foreign Application Priority Data
  • the striking machine has a hammer which repeatedly Feb. 13, 1970 Sweden 1851/70 Strikes to drive a connected thereto- The hammer is spring biased to the striking position and the 52 U.S. C1.
  • This invention relates to a striking machine comprising a tool holder and a striking mechanism adapted by a hammer member to effect repeated blows against an anvil mounted in connection to the tool holder.
  • Striking machines of the aforesaid kind are previously known and available in many different constructions.
  • the mechanisms utilized in these machines for effecting the striking movement, and thereby the impact proper, are relatively expensive and, consequen'tly, also the purchase price of the machines is high.
  • the present invention therefore, has as its object to produce a striking machine of the aforesaid kind which comprises a simplified but safely operating mechanism for effecting the striking movement, and which is cheap to manufacture.
  • the machine according to the invention is particularly adapted for driving in sheet pilings and the like, for breaking frozen soil, concrete and the like, and is to be designed such that it can be mounted on the bucket of an excavator.
  • the striking machine according to the invention shall also be adapted for use for the same purpose and in the same way as known machines of this kind.
  • the striking machine is characterized in that the striking mechanism comprises a mechanism for moving the hammer member a suitable distance from the anvil, and a striker spring coacting with the hammer member and adapted during the movement of the hammer member to be compressed so as upon spring-back to effect the blow of the hammer member against the anvil.
  • FIG. 1 shows in a section a front view of the machine according to the invention
  • FIG. 2 shows a lateral view, also in a section, of the machine in FIG. 1.
  • 1 designates generally that machine portion in which at the embodiment shown the drive motor of the machine is disposed. It may, however, be pointed out already here, that the necessary driving power can be supplied to the machine in other known ways, so that the machine need not carry any drive motor.
  • the motor applied in the embodiment shown which may be electric, hydraulic, pneumatic or an internal combustion engine, is connected via a suitable transmission (not shown) with a drive shaft 3 supported in a bearing 2.
  • Said bearing 2 is mounted in a partition wall between the motor part 1 and a casing 4, which includes the mechanism of the machine for effecting the striking movement required. Said mechanism hereinafter will be called lifting mechanism.
  • the mounting proper of said plate 7 preferably is made by means of screws 8 rendering it possible to exchange the cam plate, when necessary, easily and rapidly.
  • the cam plate 7 is formed inwardly with a cam curve 9, which may be said to have Z-shape and is symmetric in relation to a plane through the narrowest curve per tion, i.e., said cam curve in the embodiment shown comprises two identical lift curves, which during one revolution effect two blows. It is also possible to form the cam plate with only one such curve or with more than two curves, depending on how many blows per minute at a definite speed of the drive shaft 3 are desired.
  • cam plate 7,7 or more precisely with its cam curve 9 coacts a cam follower in the form of a lift pin 10 mounted for rotary motion in a bearing 11.
  • Said bearing 11 is secured at one end of an arm 12, which is pivotally supported on an axle 13 and with its other end, in the starting position shown in the figures, abuts a mounting sleeve 15 suspended from the axle 13 for mounting therein a hammer member, which is a lift rod 16 with a striking head 17.
  • the lift: rod 16 is rigidly connected with the mounting sleeve: by means of cotter pins, studs, screws 18 or the like.
  • Guide bars 19 are arranged on both sides of the axle 13 for guiding the axle so as to move in a straight line without deflecting laterally along a lift line, which in the embodiment shown coincides with the longitudinal axis of the lift rod and is laterally offset in relation to the center of rotation of the cam plate.
  • a guide sleeve 20 is provided in spaced relationship to the axle 13, which sleeve at its ends is provided with suitable slide bearings for the lift rod.
  • the guide sleeve 20 is supported on a plate 21, which is fastened by bolts between the casing 4 for the lifting mechanism and a. casing 22 enclosing the striking mechanism proper, at the end of which casing 22 a tool holder 23 with anvil 24 is arranged.
  • a strong striker spring 25 enclosing the lift rod 16 is clamped, which spring upon lifting of the lift rod is compressed still more so as upon spring-back to effect the blow.
  • each of the lift curves is designed so as during one third of a revolution to effect one quarter of the total lifting movement, while it during the following one sixth of the revolution effects the remaining part of the lifting movement, provided that the cam curve comprises two identical cam curves.
  • the arm 12 When the lift pin is rolling off from the lift curve, the arm 12 is pivoted vehemently in counter-clockwise direction and abuts the lift rod 16 or, more precisely, the mounting sleeve thereof.
  • a shock-absorbing cushion 28 is fastened at the end of the arm.
  • the cushion has as a further object to limit the pivotal movement of the arm in counter-clockwise direction, so that v the lift pin 10 at the striking movement is guided to the lowermost portion of the lift curve, which does not participate in the lifting carried out, and which now is turned ahead through half a revolution in relation to the position shown in the figures.
  • a striking machine comprising:
  • one end of said striking member being rotatably secured to an axle, said axle being restrained in its travel to a direction along the longitudinal axis of said striking member;
  • lever member a lever member, said lever member being rotatably mounted to said axle at a point between the ends of said lever;
  • g. means for preventing said second end of said lever from passing the longitudinal axis of said striking member.
  • said means for preventing said second end of said lever comprises a mounting sleeve on said striking member.
  • said interior camming surface comprises at least two identical curves each of said curvesdefining a trailing lifting pocket and a leading edge said curves being disposed so that when said trailing pocket of said first curve is substantially in line with the longitudinal axis of said striking hammer said leading edge surface of said second curve is not substantially aligned with said longitudinal axis of said striking hammer whereby said pin falls from said lifting pocket of said first curve to the lowest point of said second curve without striking said leading surface of said second curve as said lifting pocket of said first curve passes the longitudinal axis of said striking hammer.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)
US00113889A 1970-02-13 1971-02-09 Striking machine Expired - Lifetime US3747691A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7001851A SE371129B (enrdf_load_stackoverflow) 1970-02-13 1970-02-13

Publications (1)

Publication Number Publication Date
US3747691A true US3747691A (en) 1973-07-24

Family

ID=20258955

Family Applications (1)

Application Number Title Priority Date Filing Date
US00113889A Expired - Lifetime US3747691A (en) 1970-02-13 1971-02-09 Striking machine

Country Status (7)

Country Link
US (1) US3747691A (enrdf_load_stackoverflow)
AU (1) AU2530071A (enrdf_load_stackoverflow)
CA (1) CA939897A (enrdf_load_stackoverflow)
DE (1) DE2106401A1 (enrdf_load_stackoverflow)
FR (1) FR2078524A5 (enrdf_load_stackoverflow)
GB (1) GB1338022A (enrdf_load_stackoverflow)
SE (1) SE371129B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4214944A (en) * 1978-05-23 1980-07-29 American Can Company Adhesive bonding of assembly parts
US4732220A (en) * 1983-05-19 1988-03-22 Marcus Komponenter Ab Apparatus for briefly and impulsively releasing mechanical energy
CN103046885A (zh) * 2013-01-23 2013-04-17 郭子江 一种采油管接箍松动振击器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2215292B1 (enrdf_load_stackoverflow) * 1973-01-25 1978-08-04 Ecolasse Jean Guy

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1464824A (en) * 1922-03-22 1923-08-14 Electric Hammer Company Electric hammer
US2298792A (en) * 1941-06-27 1942-10-13 Hicks John Royal Rock drill
US2772858A (en) * 1955-04-25 1956-12-04 Joseph C Novack Power hammers
US3587754A (en) * 1969-11-24 1971-06-28 L F Garot Power driven hammers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1464824A (en) * 1922-03-22 1923-08-14 Electric Hammer Company Electric hammer
US2298792A (en) * 1941-06-27 1942-10-13 Hicks John Royal Rock drill
US2772858A (en) * 1955-04-25 1956-12-04 Joseph C Novack Power hammers
US3587754A (en) * 1969-11-24 1971-06-28 L F Garot Power driven hammers

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4214944A (en) * 1978-05-23 1980-07-29 American Can Company Adhesive bonding of assembly parts
US4732220A (en) * 1983-05-19 1988-03-22 Marcus Komponenter Ab Apparatus for briefly and impulsively releasing mechanical energy
CN103046885A (zh) * 2013-01-23 2013-04-17 郭子江 一种采油管接箍松动振击器

Also Published As

Publication number Publication date
DE2106401A1 (enrdf_load_stackoverflow) 1971-08-19
SE371129B (enrdf_load_stackoverflow) 1974-11-11
FR2078524A5 (enrdf_load_stackoverflow) 1971-11-05
CA939897A (en) 1974-01-15
AU2530071A (en) 1972-08-17
GB1338022A (en) 1973-11-21

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